• 디지털융복합연구
• /
• 제18권1호
• /
• pp.309-314
• /
• 2020

모바일게임에서 지식재산권인 IP를 활용한 게임 개발 방식은, 모바일게임의 경쟁심화에 따른 시장에서 경쟁우위 확보를 위해 그 중요성이 부각되어 왔다. 본 연구에서는 IP활용 모바일게임의 효과성을 검증하고, IP 활용 모바일게임 제작 시 보다 효과적인 IP선택 기준을 제시하고자 하였다. 이를 위하여, 국내 모바일게임 시장에서 대표성을 가진 구글 플레이 스토어의 매출순위 상위 200위 내에 위치한 게임들을 대상으로, IP활용 모바일게임을 분류하고, IP활용 모바일 게임에 활용된 IP를 각 타입 별로 나누어 그 비중을 분석하였다. 분석결과, IP활용 모바일게임은 매출성과에 있어 유의미한 성과를 거두고 있는 것으로 나타났다. 모바일게임 제작 시 활용된 IP 타입 중, '게임(국내게임 원작)'타입 IP가 가장 높은 매출 성과를 얻을 수 있는 IP 타입으로 분석 되었다. 게임의 성공에는 IP이외에도 다양한 요소가 영향을 주는 만큼, IP가 게임의 성공에 미치는 영향에 대해 보다 다각적인 방향에서 추가연구가 필요하다.

• Journal of Periodontal and Implant Science
• /
• 제39권1호
• /
• pp.27-36
• /
• 2009

Purpose: The stability of periodontal condition and marginal bone level were important to achieve long-term success of dental implant treatment. The aim of this study was to evaluate periodontal conditions and marginal bone loss around 67 GSII(OSSTEM, Seoul, Korea) dental implants with dual-microthread at the neck portion, 1 year after prosthetic loading. Materials and methods: Sixty-seven GS II dental implants in 27 patients(mean age; $47.4{\pm}14.0$ years) who received implant treatments at Pusan National University Hospital, were included in this study. Thirteen US II(OSSTEM, Seoul, Korea) implants with smooth neck design were selected for the control group. Periodontal and radiographic evaluations were carried out at baseline, 6 months and 12 months after prosthetic loading. Results: In the GS II group, plaque index(PI), gingival index(GI) and probing depth(PD) increased as time passed. In the US II group, GI and PD increased. Although marginal bone level was lower in the US II group in all evaluation periods, the changes between the periods were not statistically significant(p>0.05). In each period, periodontal parameters were not statistically significant between groups. Conclusion: One year after prosthetic loading, GS II and US II dental implants showed similar periodontal conditions and marginal bone response, and were within the criteria of success.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
• /
• 제47권6호
• /
• pp.411-426
• /
• 2021

Combining different procedures to reduce the number of surgical sessions and patient discomfort in implant placement and sinus floor elevation has been recommended, and evidence supports good outcomes. The aim of this study was to review the results of clinical studies on sinus floor elevation through extraction sockets and simultaneous immediate posterior implant placement. An electronic search was carried out in PubMed, Scopus, and Web of Science to find English articles published in or before August 2020. A manual search was also performed. Titles, abstracts, and the full-text of the retrieved articles were studied. Thirteen studies met our eligibility criteria: 6 retrospective case series, 3 case reports, 2 prospective cohort case-series, 1 prospective case series, and 1 randomized controlled trial. Overall, 306 implants were placed; 2 studies reported implant survival rates of 91.7% and 98.57%. The others either did not report the survival rate or reported 100% survival. Sinus floor elevation through a fresh extraction socket and simultaneous immediate implant placement appears to be a predictable modality with a high success rate. However, proper case selection and the expertise of the clinician play fundamental roles in the success of such complex procedures.

• The Journal of Advanced Prosthodontics
• /
• 제15권1호
• /
• pp.44-54
• /
• 2023

PURPOSE. To assess the clinical performance of monolithic CAD-CAM lithium disilicate glass-ceramic (LDGC) crowns and metal-ceramic (MC) crowns provided by predoctoral students. This study also assessed the effects of patient and provider-related factors on their clinical performance as well as patient preference for these types of crowns. MATERIALS AND METHODS. Twenty-five patients who received 50 crowns (25 LDGC CAD-CAM and 25 MC) provided by predoctoral students were retrospectively examined. LDGC CAD-CAM crowns were milled in-house using the CEREC Bluecam system and cemented with either RelyX Unicem or Calibra Esthetic resin cements. MC crowns were cemented with RelyX Unicem cement. Clinical assessment of the crowns and the supporting periodontal structures were performed following the modified California Dental Association (CDA) criteria. Patients' preference was recorded using a visual analog scale (VAS). The results were statistically analyzed using log-rank test, Pearson Chi-squared test and Kaplan-Meier survival analysis. RESULTS. Twelve complications were observed in the MC crown group (9-esthetic, 2-technical and 1-biological). In comparison, 2 complications in the LDGC CAD-CAM crown group were observed (1-technical and 1-esthetic). The 6-year cumulative survival rates for MC crowns and LDGC CAD-CAM were 90.8% and 96%, respectively, whereas the success rates were 83.4% and 96%, respectively. Overall, patients preferred the esthetic outcomes of LDGC CAD-CAM crowns over MC crowns. CONCLUSION. The high survival and success rates, low number of complications, and the high level of patients' acceptance of monolithic LDGC CAD-CAM crowns lend them well as predictable and viable alternatives to the "gold standard" MC crowns.

• Journal of Periodontal and Implant Science
• /
• 제53권1호
• /
• pp.38-53
• /
• 2023

Purpose: The current Classification of Periodontal and Peri-Implant Diseases and Conditions, published and disseminated in 2018, involves some difficulties and causes diagnostic conflicts due to its criteria, especially for inexperienced clinicians. The aim of this study was to design a decision system based on machine learning algorithms by using clinical measurements and radiographic images in order to determine and facilitate the staging and grading of periodontitis. Methods: In the first part of this study, machine learning models were created using the Python programming language based on clinical data from 144 individuals who presented to the Department of Periodontology, Faculty of Dentistry, Süleyman Demirel University. In the second part, panoramic radiographic images were processed and classification was carried out with deep learning algorithms. Results: Using clinical data, the accuracy of staging with the tree algorithm reached 97.2%, while the random forest and k-nearest neighbor algorithms reached 98.6% accuracy. The best staging accuracy for processing panoramic radiographic images was provided by a hybrid network model algorithm combining the proposed ResNet50 architecture and the support vector machine algorithm. For this, the images were preprocessed, and high success was obtained, with a classification accuracy of 88.2% for staging. However, in general, it was observed that the radiographic images provided a low level of success, in terms of accuracy, for modeling the grading of periodontitis. Conclusions: The machine learning-based decision system presented herein can facilitate periodontal diagnoses despite its current limitations. Further studies are planned to optimize the algorithm and improve the results.

• Clinical Endoscopy
• /
• 제56권5호
• /
• pp.650-657
• /
• 2023

Background/Aims: Endoscopic ultrasound gallbladder drainage (EUS-GBD) is gaining attention as a treatment method for cholecystitis. However, only a few studies have assessed the outcomes of permanent stenting with EUS-GBD. Therefore, we evaluated the clinical outcomes of permanent stenting using EUS-GBD. Methods: This was a retrospective, single-center cohort study. The criteria for EUS-GBD at our institution are a high risk for surgery, inability to perform surgery owing to poor performance status, and inability to obtain consent for emergency surgery. EUS-GBD was performed using a 7-Fr double-pigtail plastic stent with a dilating device. The primary outcomes were the recurrence-free rate of cholecystitis and the late-stage complication-avoidance rate. Secondary outcomes were technical success, clinical success, and procedural adverse events. Results: A total of 41 patients were included in the analysis. The median follow-up period was 168 (range, 10-1,238) days. The recurrence-free and late-stage complication-avoidance rates during the follow-up period were 95% (38 cases) and 90% (36 cases), respectively. There were only two cases of cholecystitis recurrence during the study period. Conclusions: EUS-GBD using double-pigtail plastic stent was safe and effective with few complications, even in the long term, in patients with acute cholecystitis.

• The Journal of Advanced Prosthodontics
• /
• 제16권4호
• /
• pp.255-266
• /
• 2024

PURPOSE. This study aimed to evaluate the clinical performance of implant-assisted removable partial dentures (IARPD) with surveyed crowns, also known as implant-crown-retained removable partial dentures (ICRPDs). MATERIALS AND METHODS. Electronic searches of MEDLINE/PubMed, the Cochrane Central Register of Controlled Trials, the Web of Science, and the Korea Citation Index were performed according to the established search terms for ICRPD. A literature search was conducted for studies published in English or Korean until September 2023, using the Preferred Reporting Items for Systematic Reviews and Meta-analysis (PRISMA) guidelines. RESULTS. A total of 216 journals were searched, and 31 eligible studies were selected based on the inclusion and exclusion criteria. One systematic review included five case reports of ICRPD. Nine retrospective studies evaluated implant survival/success rate, implant failure cases, marginal bone loss, periodontal status, clinical complications, and patient satisfaction. Twenty-one case reports published in Korea showed good prognoses. CONCLUSION. According to the findings of this systematic review, ICRPD has a reasonable survival/success rate, minimal bone loss, and high patient satisfaction.

• Asian Pacific Journal of Cancer Prevention
• /
• 제17권3호
• /
• pp.1115-1118
• /
• 2016

Background: There is controversy about ablation efficacy of low or high doses of radioiodine-131 (RAI) in patients with differentiated thyroid cancers (DTC). The purpose of this prospective study was to determine efficacy of 30 mCi and 100 mCi of RAI to achieve successful ablation in patients with low to intermediate risk DTC. Materials and Methods: This prospective cross sectional study was conducted from April 2013 to November 2015. Inclusion criteria were patients of either gender, 18 years or older, having low to intermediate risk papillary and follicular thyroid cancers with T1-3, N0/N1/Nx but no evidence of distant metastasis. Thirty-nine patients were administered 30 mCi of RAI while 61 patients were given 100 mCi. Informed consent was acquired from all patients and counseling was done by nuclear physicians regarding benefits and possible side effects of RAI. After an average of 6 months (range 6-16 months; 2-3 weeks after thyroxin withdrawal), these patients were followed up for stimulated TSH, thyroglobulin (sTg) and thyroglobulin antibodies, ultrasound neck (U/S) and a diagnostic whole body iodine scan (WBIS) for ablation outcome. Successful ablation was concluded with stimulated Tg< 2ng/ml with negative antibodies, negative U/S and a negative diagnostic WBIS (triple negative criteria). ROC curve analysis was used to find diagnostic strength of baseline sTg to predict successful ablation. Results: Successful ablation based upon triple negative criteria was 56% in the low dose and 57% in the high dose group (non-significant difference). Based on a single criterion (follow-up sTg<2 ng/ml), values were 82% and 77% (again non-significant). The ROC curve revealed that a baseline sTg level ${\leq}7.4ng/ml$ had the highest diagnostic strength to predict successful ablation in all patients. Conclusions: We conclude that 30 mCi of RAI has similar ablation success to 100 mCi dose in patients with low to intermediate risk DTC. A baseline $sTg{\leq}7.4ng/ml$ is a strong predictor of successful ablation in all patients. Low dose RAI is safer, more cost effective and more convenient for patients and healthcare providers.

• 패션비즈니스
• /
• 제16권3호
• /
• pp.45-62
• /
• 2012

This study aims to examine the effect of talent types on the purchasing behaviour of beauty-service products in 367 adults(female and male). The present study is the first to consider both talent types and the purchasing behaviour of beauty-service products correlates to appearance management behaviour. Frequency analysis showed that the mean of 8 talent types of 367 participants was 3.324. The highest talent type of 367 participants was interpersonal talent, the lowest talent type was logical-mathematical talent among 8 talent types. There were statistically significant relationships between the talent types(specially, bodily-kinesthetic talent and interpersonal talent) and the purchasing criteria of beauty-service products on the correlation analysis. And the effects of 8 talent types on the purchasing frequency of 4 beauty-service products were significant on the regression analysis, specifically, the results showed that the most significant among 8 talent factors was the interpersonal talent, next, the bodily-kinesthetic was. Thus, the more purchasing frequency of beauty-services products, the higher interpersonal talent were, and the better affinity with others were. As a results, the interpersonal talent factor and bodily-kinesthetic talent factor among 8 talent factors were ultimately affecting the appearance management behaviour. The higher the score, it was concluded that the subject was more active in beauty-related behavior. Conclusively, the appearance is a form of personal asset for one's self-fulfillment, and strong and beautiful appearance is a medium to improve self-esteem and dominance. It is possessing a significant influence in personal satisfaction, self-identity, and social success.

• 한국건설관리학회논문집
• /
• 제7권6호
• /
• pp.121-131
• /
• 2006

2005년 1월 사회기반시설에 대한 민간투자법 개정으로 공공서비스시설을 국민들에게 제공할 수 있는 새로운 민간투자방식인 BTL민간투자사업(Build-Transfer-Lease)이 국내건설시장에 도입하게 되었다. BTL사업은 설계, 시공, 운영 및 유지관리까지 포함하여 최장 30여년 이상의 프로젝트 수명주기 전 과정을 대상으로 하는 포괄적인 형태의 사업방식으로 사업자의 역할과 수행능력 여하에 따라 사업의 성패가 좌우됨으로 최적 사업시행자의 선정이 중요하다 그러나 BTL사업의 사업시행자 선정시 가격평가점수에 따라 많은 영향을 받아 최저가 투찰로 인하여 우수한 기술능력을 갖춘 사업시행자보다 최저가격을 제안한 사업시행자가 선정 될 수 있는 가능성이 높아 건설계획 운영계획 유지관리측면 등에서 품질수준이 저하될 우려가 있는 것으로 조사되었다. 따라서 본 연구는 BTL사업의 사업시행자 선정을 위한 평가기준의 문제점을 분석하고 전문가 설문조사를 통하여 개선방향을 모색하여 평가기준 개선방안을 제안하였다.