• Journal of Korean Neurosurgical Society
• /
• v.61 no.3
• /
• pp.352-362
• /
• 2018

Gliomas are the most common pediatric tumors of the central nervous system. In this review, we discuss the clinical features, treatment paradigms, and evolving concepts related to two types of pediatric gliomas affecting two main locations: the optic pathway and thalamus. In particular, we discuss recently revised pathologic classification, which adopting molecular parameter. We believe that our review contribute to the readers' better understanding of pediatric glioma because pediatric glioma differs in many ways from adult glioma according to the newest advances in molecular characterization of this tumor. A better understanding of current and evolving issues in pediatric glioma is needed to ensure effective management decision.

• Journal of Chest Surgery
• /
• v.20 no.4
• /
• pp.723-729
• /
• 1987

A retrospective study of 21 cases of chest wall tumors, 12 benign and 9 malignant, was carried out to review their clinical radiological and pathological features. On age distribution, most cases [80.9%] were found in 4th to 6th decades. The sex ration [M:F] was represented as 2.5:1. Of the 21 lesions, there were 8 cases of soft tissue tumors, 4 cases of bone and cartilage origined tumors and 9 malignant tumors which included 3 metastatic tumors. The overall mortality was 22.2% and all of the deaths were found in the malignant tumors. All of the patients with benign tumors were treated by excision without recurrence. Distinction between benign and malignant chest wall tumors was not possible using radiographic criteria unless cortical destruction and involvement of soft tissue were visualized. On the basis of our analysis, we believe that all tumors of chest wall should be considered malignant until proven otherwise and that wide excision should be carried out. This is necessary not only to obtain as adequate diagnosis but also to provide the best chance for cure in both benign and malignant lesions.

• Journal of Korean Neurosurgical Society
• /
• v.48 no.3
• /
• pp.294-297
• /
• 2010

Abnormalities of the posterior arch, including congenitally absent cervical pedicle and cervical spondylolysis, are rare entities that are usually found incidentally on neck radiographs. It is important to recognize these characteristic radiological features because their radiographic appearance may cause them to be confused with more serious entities such as fractures, locked facets, and tumor-induced bony erosions. Also, it is important to distinguish these abnormalities from similar pathologies to prevent the use of inappropriate treatment We report the relevant clinical and radiological findings seen in three cases of posterior arch defect after trauma with review of pertinent literature.

• Journal of computational fluids engineering
• /
• v.15 no.3
• /
• pp.46-53
• /
• 2010

Recently, several open source codes for computational fluid dynamics (CFD) have been introduced and are spreading fast. Our group has chosen the OpenFOAM as a platform to develop our own in-house code. In this brief review, we would like to share the information on the codes and what we have experienced so far. We introduce several features of OpenFOAM, which include the performance compared with commercial packages, estimation for current user population, and our own prospect for future improvement in performance and growth in user population. In addition, we briefly introduce our experience gained in embedding the level set method into the OpenFOAM.

• Journal of the Korean Society of Manufacturing Process Engineers
• /
• v.14 no.4
• /
• pp.14-20
• /
• 2015

Molding technologies for plastic microstructures have been extensively investigated during the last two decades, and theoretical and numerical studies on the micro molding process have provided efficient tools for the development of such molding technologies. In this paper, we present a review of numerical simulation methods for the micro molding process. Basic models for a description of the material property, governing equations of the flow and heat transfer during the molding process, and numerical methods will be described. Particularly, numerical simulations for micro injection molding and hot embossing processes will be presented, and their main features noted and compared to those for conventional molding processes.

• Korean Medical Education Review
• /
• v.16 no.1
• /
• pp.7-10
• /
• 2014

Portfolios have gained attention in medical education as a tool for promoting student learning and assessment since Miller's call for better tools for assessing students' clinical competencies. This paper reviews the development and use of e-portfolios for promoting learning and assessment in medical schools, both domestically in Korea and internationally. This review finds that some specific features need to be incorporated into e-portfolio systems for medical education and that these systems can be used to manage student learning in clinical clerkships and to support competency-based assessment. The author asserts that the e-portfolio is key to promoting competency-based education and suggests practical tips for effective development and use of e-portfolios in Korean medical schools.

• The Research Journal of the Costume Culture
• /
• v.11 no.2
• /
• pp.243-252
• /
• 2003

The study was designed to review the changes in designs and the manufacturing methods of french hood, one of the headdresses which play an important role in showing the appearance of costume, to understand design expression techniques through manufacturing of the head dress of the western costumes, and to provide materials to exert creativity for new designs. Based on literature review and portrait study, 1 manufactured a frenchhood. I set the study cope as from the late 15 century when frenchhood was used for the first time, to the mid 16 century. For the frenchhood selected, 1 examined the hair style, the characteristics of the french hood, and the pattern first, and proceeded to manufacturing. 1 used velvet and silk for the textile as explained in the literature. And, 1 purchased such similar ornaments as shown in the pictures, making the color so similar to the original to the most. Dimensions in manufacturing were those In the literature, since the study is focusing on the reproduction of the features of the portraits. Dimensions of detailed decoration were measured using the ratio of the headdress in the portraits.

• Journal of Korean Neurosurgical Society
• /
• v.47 no.4
• /
• pp.306-309
• /
• 2010

We recently experienced a case of synovial sarcoma in the posterior neck, which involved adjacent bony structures. Synovial sarcoma is rare, malignant soft tissue tumor that occur predominantly in the lower extremities. Wide surgical excision with involved tissue is the treatment of first choice, because most synovial sarcomas reveal aggressive features. We removed the tumor with involved bony structures and patient was given postoperative radiation therapy. Despite these treatment options, the patient died 1 year after surgery. We report this case with a review of the literature.

• Annual Conference of KIPS
• /
• 2016.10a
• /
• pp.677-680
• /
• 2016

In computer vision and image processing, feature detection and description are essential parts of many applications which require a representation for objects of interest. Applications like object recognition or motion tracking will not produce high accuracy results without good features. Due to its importance, research on image feature has attracted a significant attention and several techniques have been introduced. This paper provides a review on well-known image feature detection and description techniques. Moreover, two experiments are conducted for the purpose of evaluating the performance of mentioned techniques.

• Journal of Biosystems Engineering
• /
• v.39 no.3
• /
• pp.215-226
• /
• 2014

Recently, spectroscopy has emerged as a potential tool for quality evaluation of numerous food and agricultural products because it provides information regarding both spectral distribution and image features of the sample (i.e., hyperspectral imaging). Spectroscopic techniques reveal hidden information regarding the sample and do so in a non-destructive manner. This review describes the various approaches of spectroscopic modalities, especially hyperspectroscopy and vibrational spectroscopies (i.e., Raman spectroscopy and Fourier transform near infrared spectroscopy) combined with chemometrics for the non-destructive assessment of contaminations and defects in agro-food products.