• 충청수학회지
• /
• 제34권3호
• /
• pp.295-306
• /
• 2021

The general sextic functional equation is a generalization of many functional equations such as the additive functional equation, the quadratic functional equation, the cubic functional equation, the quartic functional equation and the quintic functional equation. In this paper, motivating the method of Găvruta [J. Math. Anal. Appl., 184 (1994), 431-436], we will investigate the stability of the general sextic functional equation.

• Journal of the Korean Society for Industrial and Applied Mathematics
• /
• 제26권1호
• /
• pp.1-22
• /
• 2022

A tandem queue that consists of nodes with buffers of finite capacity and general blocking scheme is considered. The service time distribution of each node is exponential whose rate depends on the state of the node. The blocking scheme at a node may be different from that of other nodes. An approximation method for the system based on decomposition method is presented. The effectiveness of the method is investigated numerically.

• 한국환경복원기술학회지
• /
• 제10권3호
• /
• pp.88-99
• /
• 2007

This study is aimed to suggest a direction for the general environment education through analyzing current environment education curriculums and survey of educational needs for students in Korean universities. Since the result of this survey shows that most university students lack experience in environmental education in their secondary education, the basic educational programs as well as advanced educational programs should be included to develop a general environmental education curriculum for university students. So far, general environmental education for university students has not witnessed a clear and distinct object and direction. Since we live in a situation where environmental problems should be considered in every aspect of our society, the general environmental education curriculum for university students shall play a role to solve these problems. Additionally, we need to change the way of environment education from educating and raising the environment professionals to educating and raising people who comprehensively understand economy, society and environment under the sustainable development paradigm. Also the focus of environmental education should swift from natural science to over all perspectives. Recently, the need of interdisciplinary curriculum for the environment education field has been discussed in universities. However, it has not been integrated into the normal curriculum. In this regard, systemic improvement which enables general education curriculum to operate flexibly will be followed. The key to establish an interdisciplinary curriculum is a flexible educational curriculum system which can solve problems arising from departmental curriculums, and promptly respond to the demand of educational and social consumers. Additionally, the result of survey shows that students want diverse educational operations and teaching methods, equipping educational assistance system for these needs will be required.

• Asian Pacific Journal of Cancer Prevention
• /
• 제15권1호
• /
• pp.407-411
• /
• 2014

Objective: To observe local and systemic toxicity after sustained-release 5-fluorouracil (5-Fu) implantation in canine peritoneum and para-aortic abdominalis and the changes of drug concentration in the local implanted tissue with time. Methods: 300 mg sustained-release 5-Fu was implanted into canine peritoneum and para-aorta abdominalis. Samples were taken 3, 5, 7 and 10 days after implantation for assessment of changes and systemic reactions. High performance liquid chromatography was applied to detect the drug concentrations of peritoneal tissue at different distances from the implanted site, lymphatic tissue of para-aortic abdominalis, peripheral blood and portal venous blood. Results: 10 days after implantation, the drug concentrations in the peritoneum, lymphatic tissue and portal vein remained relatively high within 5 cm of the implanted site. There appeared inflammatory reaction in the local implanted tissue, but no visible pathological changes such as cell degeneration and necrosis, and systemic reaction like anorexia, nausea, vomiting and fever. Conclusions: Sustained-release 5-Fu implantation in canine peritoneum and para-aortic abdominalis can maintain a relatively high tumour-inhibiting concentration for a longer time in the local implanted area and portal vein, and has mild local and systemic reactions. Besides, it is safe and effective to prevent or treat recurrence of gastrointestinal tumours and liver metastasis.

• Journal of Dental Anesthesia and Pain Medicine
• /
• 제16권3호
• /
• pp.213-216
• /
• 2016

Children with an intellectual disability often demonstrate lack of cooperation during dental treatment and require behavioral management. A child with mild intellectual disability can be managed adequately using restraints and medication. However, in cases of profound intellectual disability, dental treatment under general anesthesia is usually required. In cases where the patient is an intellectually disabled child who has intellectually disabled parents, it is difficult to evaluate the patient's preoperative condition and to obtain consent for treatment under general anesthesia. Furthermore, they are unable to respond to emergencies after treatment. Therefore, dental treatment should be performed under general anesthesia with hospitalization for children with an intellectual disability. This case presents the dental treatment of an intellectually disabled child, who has intellectually disabled parents, and who required general anesthesia and hospitalization.

• 한국간담췌외과학회지
• /
• 제28권2호
• /
• pp.125-133
• /
• 2024

Undifferentiated carcinoma with osteoclast-like giant cells (UC-OGCs) of the pancreas is a rare neoplasm that accounts for less than 1% of all pancreatic malignancies. The aim of this study was to review the literature regarding UC-OGC, and to highlight its biological behavior, clinicopathologic characteristics, prognosis, and therapeutic options. A systematic review of the literature in PubMed/Medline and Scopus databases was performed (last search October 31st, 2023) for articles concerning pancreatic UC-OGC in the adult population. Fifty-seven studies met the inclusion criteria, involving 69 patients with a male-to-female ratio of 1.1:1 and a mean age of 62.96. Main symptoms included abdominal pain (33.3%), jaundice (14.5%), weight loss (8.7%), while fourteen patients (20.3%) were asymptomatic. Surgical resection was performed in 88.4% of cases. Survival rates at one, three, and five years were 58%, 44.7%, and 37.3% respectively. Sex, age, size (cut-off of 4 cm), location, and adjuvant treatment did not significantly affect patient survival. UC-OGC of the pancreas is a rare subtype of undifferentiated pancreatic carcinoma with a better prognosis than conventional pancreatic ductal adenocarcinoma or undifferentiated carcinoma without giant cells. The establishment of a dedicated patient registry is imperative to further delineate the optimal treatment for this uncommon clinical entity.

• 보건의료산업학회지
• /
• 제11권4호
• /
• pp.67-76
• /
• 2017

Objectives : This study compared Value added to personnel expenses between 12 private general hospitals and 12 regional public hospitals, based on location and size, to examine industry competitiveness in terms of management. Methods : From 2011 to 2015, the value added and value added to personnel expenses were calculated by year. and a SPSS statistical program was used to determine and influential factors between private general hospitals and regional public hospitals. Results : The total value added to personnel expenses was 26.85 percent lower than general hospitals compared to regional public hospitals. The product category most influenced by the value added to personnel expenses was Stationeries & expendables at general hospitals and Outsourcing at regional public hospitals. Conclusions : Regional public hospitals have relatively low value added to personnel expenses compared to the general hospitals. Therefore, it is necessary for hospital management to reexamine gross revenue relative to total manpower.

• Journal of Preventive Medicine and Public Health
• /
• 제24권3호
• /
• pp.400-413
• /
• 1991

The purpose of this paper is to identify factors affecting the optimum mix of required inputs and other relevant factors which account for the variation in physician's productivity in general hospitals, and to find out their implications for the efficient health planning and management. An extended version of Cobb-Douglas production function and cross sectional data of one day patient census from all general hospitals in Korea in 1988 were used in the analysis. Main results of the analysis and their implications could be summarized as follows : (1) The production function for physician's inpatient service shows the evidence of economies of scale, but the production function for physician's outpatient and adjusted-patient service, which combines both out- and in-patient service, shows that of dis-economies of scale. (2) The physician's role for production for all service is smaller than auxiliary personnel's, which imply that more intensive utilization of nurses, nursing aides and other auxiliary personnel is desirable for improving general hospital productivity (3) In case of physician's inpatient and adjusted-patient service, nurses' role is greater than nursing aides'. Therefore, more extensive utilization of nurses is recommended for the efficient operation of general hospitals. (4) The factor of hospital beds plays the leading role among required inputs in the production for physician's in- and adjusted-patient service. (5) The physician's productivity of general hospitals in rural area is lower than that in urban area. And the productivity of teaching hospitals is lower than that of the other hospitals. Further analysis was made in physician production function based upon the size of hospitals, namely those hospitals below 250 beds and those above. Explained variances by the factor of hospital beds was significantly increased in the case of those hospitals above 250. A more detailed and thorough investigation is needed for verifying factors influencing physician's productivity in general hospitals in Korea.

• Journal of applied mathematics & informatics
• /
• 제17권1_2_3호
• /
• pp.171-183
• /
• 2005

In this paper, we introduce and study a class of general strongly nonlinear quasivariational inequalities in Hilbert spaces. We prove the existence and uniqueness of solution and convergence of the perturbed the three-step iterative sequences with errors for this kind of general strongly nonlinear quasivariational inquality problems involving relaxed Lipschitz, relaxed monotone, and strongly monotone mappings. Our results extend, improve, and unify many known results due to Liu-Ume-Kang, Kim-Kyung, Zeng and others.

• 대한족부족관절학회지
• /
• 제8권1호
• /
• pp.114-115
• /
• 2004

A 18-year-old male soccer player had painful triggering and occasional locking of the great toe caused by entrapment of the flexor hallucis longus tendon within the flexor sheath posterior to the right medial malleolus. After other treatment modalities failed, the condition was relieved by a surgical procedure that removed the nodule on the flexor hallucis longus tendon and the ganglion under flexor retinaculum. Tendon rupture was not found, although there was tendinitis.