• Korean Journal of Environment and Ecology
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• v.24 no.5
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• pp.575-581
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• 2010

This study was accomplished for verifying the biotope field survey accuracy in the forests. Biotope data is used as the standard for the preservation and restoration of the urban ecosystem. The study area is the forests of Gwanak-gu, Seoul. For verifying accuracy, first we compared biotope field survey results between 2000 and 2005, second we compared between field survey results and satellite imagery. For comparing with satellite imagery, we delineated the evergreen-coniferous forests from imagery taken during winter season. As a result of comparison, the ratio of most actual vegetation types by delineated detail field surveys were matched around 92% between 2000 and 2005. But, between 2 field surveys, around 60% of total vegetation type was regionally matched. Evergreen-coniferous forests extracted by satellite imagery were regionally matched 69.4% of field survey result in 2000, and matched 80% of the result in 2005. If we consider the delineating errors from deciphering the picture, the results have high accuracy, especially 2005. The processes of verifying accuracy have not been proceeding in the part of delineating actual vegetation works. The verification of accuracy is important for the renewal process. Thus, the various verification methods will be studied and criteria should be developed for enhancing objectivity.

• Progress in Medical Physics
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• v.19 no.3
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• pp.178-185
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• 2008

Living donor liver transplantation is increasingly performed as an alternative to cadaveric transplantation. Preoperative screening of the donor candidates is very important. The quality, size, and vascular and biliary anatomy of the liver are best assessed with magnetic resonance (MR) imaging or computed tomography (CT). In particular, the volume of the potential graft must be measured to ensure sufficient liver function after surgery. Preoperative liver segmentation has proved useful for measuring the graft volume before living donor liver transplantations in previous studies. In these studies, the liver segments were manually delineated on each image section. The delineated areas were multiplied by the section thickness to obtain volumes and summed to obtain the total volume of the liver segments. This process is tedious and time consuming. To compensate for this problem, automatic segmentation techniques have been proposed with multiplanar CT images. These methods involve the use of sequences of thresholding, morphologic operations (ie, mathematic operations, such as image dilation, erosion, opening, and closing, that are based on shape), and 3D region growing methods. These techniques are complex but require a few computation times. We made a phantom for volume measurement with pig and evaluated actual volume of spleen and liver of phantom. The results represent that our semiautomatic volume measurement algorithm shows a good accuracy and repeatability with actual volume of phantom and possibility for clinical use to assist physician as a measuring tool.

• Journal of Veterinary Clinics
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• v.33 no.1
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• pp.74-79
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• 2016

A 7-year-old female Pointer dog with multiple masses in the axilla, mammary gland, and bladder was submitted to the Pathology Department of the College of Veterinary Medicine in the Jeju National University. Grossly, mass between right axilla and 1st mammary gland, $15{\times}10cm$ in size, was well delineated and firm, slightly soft center, oval shape. And masses in right 1st, 3rd and 5th mammary gland were well delineated and sulphur yellow in color on the cut-surface. Numerous round to oval shaped masses, 0.3 to 2 cm in diameter were existed in the lung. Urinary bladder mucosa had rough and thick and round to oval papillary masses, 0.1 to 2 cm in diameter, on surface. Microscopically, masses in right axilla, 1st mammary gland, lung and axillary lymph node were composed of poorly differentiated tubules originated from apocrine gland. Lining neoplastic epithelium showed high mitotic figures, typical apical secretory blebs, and PAS-positive diastase-resistant cytoplasmic granules. Masses in 3rd and 5th mammary gland were confirmed as mammary complex adenoma and simple adenoma respectively. The masses in the urinary bladder were covered with stratified transitional epithelium with marked cellular atypia and high mitotic figures. Some neoplastic cells showed focal invasion into substantia propria of bladder. Immunohistochemaically, neoplastic transitional epithelium demonstrated positive reactions for cytokeratin 7, AE1/AE3, and MNF116. Based on the gross, histopathologic and immunohistochemical characteristics, this dog was diagnosed as apocrine carcinoma, mammary gland tumor including simple adenoma and complex adenoma and bladder transitional cell carcinoma. And distant metastases of apocrine carcinoma in right axilla were observed in axillary lymph node and lungs. This is the first report for concurrent occurrence of apocrine carcinoma, mammary gland tumor, and transitional cell carcinoma in a same dog.

• Progress in Medical Physics
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• v.24 no.4
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• pp.265-270
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• 2013

Correct target volume delineation is an important part of radiosurgery treatment planning process. We designed head phantom and performed target delineation to evaluate the volume differences due to radiosurgery treatment planning systems and image acquisition system, CT/MR. Delineated mean target volume from CT scan images was $2.23{\pm}0.08cm^3$ on BrainSCAN (NOVALS), $2.13{\pm}0.07cm^3$ on Leksell gamma plan (Gamma Knife) and $2.24{\pm}0.10cm^3$ on Multi plan (Cyber Knife). For MR images, $2.08{\pm}0.06cm^3$ on BrainSCAN, $1.94{\pm}0.05cm^3$ on Leksell gamma plan and $2.15{\pm}0.06cm^3$ on Multi plan. As a result, Differences of delineated mean target volume due to radiotherapy planning system was 3% to 6%. And overall mean target volume from CT scan images was 6.36% larger than those of MR scan images.

• Proceedings of the Korea Inteligent Information System Society Conference
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• 1999.10a
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• pp.121-130
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• 1999

The objective of this paper is to apply Extended AND-OR Graph (EAOG)-related techniques to extract knowledge from a specific problem-domain and perform analysis in complicated decision making area. Expert systems use expertise about a specific domain as their primary source of solving problems belonging to that domain. However, such expertise is complicated as well as uncertain, because most knowledge is expressed in causal relationships between concepts or variables. Therefore, if expert systems can be used effectively to provide more intelligent support for decision making in complicated specific problems, it should be equipped with real-time inference mechanism. We develop two kinds of EAOG-driven inference mechanisms(1) EAOG-based forward chaining and (2) EAOG-based backward chaining. and The EAOG method processes the following three characteristics. 1. Real-time inference : The EAOG inference mechanism is suitable for the real-time inference because its computational mechanism is based on matrix computation. 2. Matrix operation : All the subjective knowledge is delineated in a matrix form, so that inference process can proceed based on the matrix operation which is computationally efficient. 3. Bi-directional inference : Traditional inference method of expert systems is based on either forward chaining or backward chaining which is mutually exclusive in terms of logical process and computational efficiency. However, the proposed EAOG inference mechanism is generically bi-directional without loss of both speed and efficiency.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• v.34 no.6
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• pp.649-652
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• 2008

Osteoblastoma is a relatively rare benign bone tumor representing less than 1% of all bone tumors. The tumor usually involves the spine and sacrum of young individuals, less than 10% being localized to the skull, and nearly half of these affect the mandible, especially the posterior segments. In clinical finding, osteoblastoma present mainly with pain, swelling, and expansion of bone cortex. Radiographic appearances are variable, but frequently a well-delineated radiolucent lesion containing varying amounts of mineral deposits is seen. Histologically, ostoeblastoma is consists of irregular trabeculeae of osteoid and immature bone present within highly vascular connective tissue matrix. Osteoblastoma must be differentiated from a number of bone-producing lesions, including osteoid osteoma, fibrous dysplasia, ossifying fibroma, fibrous dysplasia, and osteosarcoma. If diagnosis may be mistaken for osteosarcoma, there are risks of more aggressive and irreversible treatment. Differential diagnosis of osteoblastoma is important. The preferred treatment of osteoblastoma is conservative approach and surgical excision. Recurrence following surgical intervention is rare. We treated osteoblastoma located in premolar area of mandible by excision with preservation of vital structure, such as nerves and teeth. So we report our clinical treatment with literature review

• Perspectives in Nursing Science
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• v.7 no.1
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• pp.1-9
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• 2010

Purpose: The purpose of this study was to review behavior change theories in terms of important variables, concept definitions, and applicability to diabetes self-management behavior. Methods: Six behavior change theories (the Transtheoretical Model, the Health Belief Model, the Theory of Reasoned Action, the Theory of Planned Behavior, Social cognitive theory, and Information-Motivation-Behavioral skills Model) were reviewed which were applied in diabetes self-management interventions. Results: The five key concepts from the five non-stage behavior change theories were delineated. Based on the key concepts, a theoretical framework was formulated as the explanatory model of diabetes self-management behaviors. The four major concepts in Information-Motivation- Behavioral skills Model were included. The cognitive arm of the proposed theoretical framework included constructs related to diabetes knowledge, motivation (beliefs, attitude, social norm), self-efficacy, and intention. Conclusion: The theoretical framework described here includes the key factors of successful diabetes self- management intervention. However, the concept of motivation needs further exploration and clarification for operationalization.

• Journal of Korean Academy of Fundamentals of Nursing
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• v.19 no.1
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• pp.23-34
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• 2012

Purpose: Respite care is not a discrete intervention, but encompasses a range of services. This research was conducted to clarify the phenomenon of respite care for family caregivers of elders with dementia from a nursing perspective. Method: The Hybrid Model of concept development was applied to clarify the concept of respite care for family caregivers of elders with dementia. The study was conducted in the following three steps, theoretical phase, fieldwork phase, and final analytic phase. Results: The definition of respite care for family caregivers of elders with dementia was delineated through integration of data analyses in theoretical and fieldwork phase, and has three dimensions; tailored supports for caregivers, tailored supports based on physical and cognitive function of elders with dementia and community interventions related to family care function. Conclusion: Through this study, the concept of respite care for family caregivers of elders with dementia is clarified and reformulated as nursing practice phenomena in the Korean context, which indicates ways to develop caring practice forms for a family living with an elder with dementia in a community setting.

• Journal of Korean Academy of Fundamentals of Nursing
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• v.12 no.2
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• pp.162-170
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• 2005

Purpose: This study was conducted to develop a curriculum model for fundamentals of nursing at the graduate level which reflects a consensus of educators and the students in Korean nursing society. Method: A survey was used with three groups to identify consensus on a curriculum model for fundamentals of nursing at the graduate level; 42 educators in fundamentals of nursing, 11 nurse educators whose major was not fundamentals of nursing and 70 nurses with a bachelor degree in nursing. Results: Consensus on a curriculum model at the graduate level were delineated from analysis of the survey, Based on these results, a curriculum model fur fundamentals of nursing at the graduate level is outlined: As one major area of nursing, fundamentals of nursing focuses on nursing practice based on basic human needs. Thus main focus of the curriculum for fundamentals of nursing at the graduate level is research performance and theory development on nursing interventions to meet basic human needs in clinical settings. Conclusions: A curriculum model for fundamentals of nursing at the graduate level suggests that its application may have a positive impact on development of distinct knowledge body for fundamentals of nursing that will differentiate the content of education for undergraduate and graduate levels of nursing. However, the suggestion for the curriculum model needs to be refined and developed for application.

• Journal of Korean Academy of Nursing Administration
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• v.19 no.5
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• pp.599-612
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• 2013

Purpose: To synthesize and identify the studies that delineated the relationship between empowerment and job satisfaction in clinical nurses in Korea. Methods: Electronic databases were searched, including KmBase, KoreaMed. riss4u, National Assembly Digital Library and National Discovery for Science Leaders (NDSL) The search terms included nurse, satisfaction and empowerment. Only papers published in Korean were included. Results: Twelve studies, from 156 references screened, were included the final analysis. All studies were non-experimental and used correlational analysis. A significant positive relationship between structural or psychological empowerment and job satisfaction was found. Older nurses with longer clinical experience and higher education background were more likely to have high level of structural and psychological empowerment and job satisfaction. Conclusion: The study results indicate that to produce an empowering work environment, nurse managers have to create a supportive organizational culture, and provide access to resources and opportunity as well as to strengthen emotional support.