• 대한골관절종양학회지
• /
• 제5권3호
• /
• pp.155-161
• /
• 1999

비골화성 섬유종에서 피질골 관(cortical tract)과 개구관(opening tract), 섬유성 피질골 결손에서 피질골내 병소의 존재는 두 병소의 형태학적인 중요한 특징이며, 이 질환을 진단하는데 중요한 단서로 활용될 수 있으리라 사료된다.

• 터널과지하공간
• /
• 제20권1호
• /
• pp.15-27
• /
• 2010

국토의 약 70%가 산악지형인 우리나라의 지형적 특성상 각종 건설공사에 따른 대절토 사면의 형성으로 인해 낙석의 위험성이 급증하고 있다. 특히 해마다 반복되는 집중호우 시의 사면 붕괴는 대규모 낙석을 동반하면서 막대한 인적, 물적 피해를 초래하고 있다. 이러한 문제점들을 해결하기 위해 많은 현장조사연구 및 기초연구들이 수행되고 있으나 이들 연구의 대부분은 낙석이 발생할 경우의 보강 및 낙석 위험도 분석 등에 국한되고 있어, 근본적인 낙석의 거동에 관한 검토 및 분석은 미진한 실정이다. 따라서 본 연구에서는 수치해석적 기법을 이용하여 사면의 외적 요소에 따른 낙석의 거동 특성을 규명하였으며, 이를 위해 개별요소법의 하나인 PFC2D가 이용되었다. 사면의 외적 요소로 사면의 표면상태, 구배, 소단 개수, 소단 구배 및 낙석의 크기에 대한 소단의 너비의 비 등이 검토되었으며, 이들 요소에 대한 다양한 변화를 통해 낙석의 거동 메커니즘이 수치해석적으로 분석되었다.

• 사상체질의학회지
• /
• 제19권3호
• /
• pp.62-74
• /
• 2007

1. Objectives This study is a pilot study to investigate the Mongolian's morphologic characteristics of face according to Sasang Constitution. 2. Methods We had collected 100 cases of Mongolian and took pictures their frontal view, lateral view of face and measured height, breaths and projected length of face with Face Features Measurement Program(FFMP) and analyzed shape differences of face according to Sasang constitution. 3. Results and Conclusions (1) In the frontal view of female, there were 11 items(total 322 items) significantly different among three constitutions, and in lateral view 13 items(total 191 items). (2) In the frontal view of male, there were 88 items(total 322 items) significantly different among three constitutions, and in lateral view 46 items(total 191 items).

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
• /
• 제29권4호
• /
• pp.249-256
• /
• 2003

The lack of sufficient oral mucosa available for intra-oral reconstruction has been dealt with by the use of skin or oral mucosa grafts harvested from donor sites but grafts requires more than one surgical procedures and could cause donor site morbidity. Many investigators have attempted to increase available soft tissue by tissue engineered skin or oral mucosa replacements for clinical applications. But, reconstructed mucosa by several methods have low physical properties such as rolling and contraction. The aims of this study were to develope an in vitro experimental model that maintains an epithelial-mesenchymal interaction by organotypic raft culture, and to characterize biologic properties of three-dimensionally cultured oral mucosa embedded with Polydioxanone mesh by histological and immunohistochemical analysis. The results were as follows; 1. Oral mucosa reconstructed by three-dimensional organotypic culture revealed similar morphologic characteristics to equvalent normal oral mucosa in the point that they show stratification and differentiation. 2. The expression of cytokeratin 10/13 and involucrin in the cultured tissue showed the same pattern with normal oral mucosa suggesting that organotypic co-culture condition is able to induce cellular differentiation. 3. After insertion of polydioxanone mesh, increased tensile strength were observed. These results suggest that three-dimensional organotypic co-culture of the oral mucosa cell lines with the dermal equvalent consisting type I collagen and fibroblasts reproduce the morphologic and immunohistochemical characteristics similar to those in vivo condition. And increased physical properties by use of polydioxanone mesh will helpful for clinical applications.

• 농촌계획
• /
• 제19권3호
• /
• pp.51-59
• /
• 2013

The objective of this study was to make a map of farmland vulnerability to flood inundation based on morphologic characteristics from the flood-damaged areas. Vulnerability mapping based on the records of flood damages has been conducted in four successive steps; data preparation and preprocessing, identification of morphologic criteria, calculation of inundation vulnerability index using a fuzzy membership function, and evaluation of inundation vulnerability. At the first step, three primary digital data at 30-m resolution were produced as follows: digital elevation model, hill slopes map, and distance from water body map. Secondly zonal statistics were conducted from such three raster data to identify geomorphic features in common. Thirdly inundation vulnerability index was defined as the value of 0 to 1 by applying a fuzzy linear membership function to the accumulation of raster data reclassified as 1 for cells satisfying each geomorphic condition. Lastly inundation vulnerability was suggested to be divided into five stages by 0.25 interval i.e. extremely vulnerable, highly vulnerable, normally vulnerable, less vulnerable, and resilient. For a case study of the Jinju, farmlands of $138.6km^2$, about 18% of the whole area of Jinju, were classified as vulnerable to inundation, and about $6.6km^2$ of farmlands with elevation of below 19 m at sea water level, slope of below 3.5 degrees, and within 115 m distance from water body were exposed to extremely vulnerable to inundation. Comparatively Geumsan-myeon and Sabong-myeon were revealed as the most vulnerable to farmland inundation in the Jinju.

• 구강회복응용과학지
• /
• 제17권4호
• /
• pp.225-230
• /
• 2001

Morphological characteristics of the asymmetric mandible in 135 adult male patients were investigated. Panoramic X-ray images were recorded. Age, ramus height, antegonial notch height, condylar height, coronoid process height, ramus body height and condylar neck angle were calculated and measured. Statistical analysis of unpaired two-tailed t-test and correlation coefficients was performed to find the morphologic differences between short ramus height side and the other. Condylar height and ramus body height in short ramus height side were smaller than those of the other side. Antegonial notch height, coronoid process height, condylar neck angle showed no differences. Condylar neck height was correlated with condylar neck angle.

• Applied Microscopy
• /
• 제12권2호
• /
• pp.23-33
• /
• 1982

The parotid glands of squirrels(Tamias sibiricus asiaticus) were observed by the electron microscope. According to the characteristics of secretory granules and the morphology of cell organelles, the acinar cells could be distinguished into five types of cells(Type I , Type II, Type III, Type IV and Type V cell). Among these, Type III, Type IV and Type V cell were not identified up to date. The morphologic characteristics of the intercalated and striated ducts were the appearance of numerous long slender mitochondria which are located between the numerous basal infoldings, and the epithelium were consisted of light and dark cells. The desmosomes were also observed, and could not found the secretory granules in the cytoplasm of the both epithelium.

• Investigative Magnetic Resonance Imaging
• /
• 제22권3호
• /
• pp.150-157
• /
• 2018

Purpose: To assess associations between morphological characteristics of intracranial arteries in time-of-flight MR angiography (TOF-MRA) and atherosclerotic risk factors. Materials and Methods: From January 2014 to October 2015, a total of 129 patients (65 men and 64 women) without intracranial arterial stenosis > 50% were included in this study. All MRIs were performed using a 3T machine with 3D TOF-MRA sequences. We evaluated irregularity, tortuosity, and dilatation of intracranial arteries in maximal intensity projection (MIP) of TOF-MRA. Subjects' risk factors for atherosclerosis including history of hypertension and diabetes were collected by reviewing their medical records. Associations between morphological characteristics and each known atherosclerosis risk factor were examined using univariate regression analysis. Multivariate regression models were built to determine combined association between those risk factors and morphologic changes of intracranial arteries. Results: In multivariate analysis, hypertension (coefficient [95% CI]: 0.162 [0.036, 0.289], P = 0.012) and absence of diabetes (coefficient [95% CI]: -0.159 [-0.296, -0.023], P = 0.022) were associated with large diameter of intracranial arteries. Males (coefficient [95% CI]: 0.11 [-0.006, 0.23], P = 0.062) and higher age (coefficient [95% CI]: 0.003 [-0.001, 0.008], P = 0.138) had marginal association with increased diameter. Tortuosity was associated with old age (OR: 1.04 [1.02, 1.07], P < 0.001). Irregular contour of intracranial arteries was significantly associated with old age (OR: 1.05 [1.02, 1.09], P = 0.004), presence of diabetes (OR: 2.88 [1.36, 6.15], P = 0.0058), and previous ischemic stroke (OR: 3.91 [1.41, 11.16], P = 0.0092). Conclusion: Morphological characteristics (irregularity, tortuosity, dilatation) of intracranial arteries seen in TOF-MRA might be associated with atherosclerotic risk factors in subjects with no or mild stenosis.

• Tuberculosis and Respiratory Diseases
• /
• 제80권2호
• /
• pp.179-186
• /
• 2017

Background: Although the World Health Organization (WHO) classification of lung squamous cell carcinoma (SCC) was revised in 2015, its clinical implications for lung SCC subsets remain unclear. We investigated whether the morphologic characteristics of lung SCC, including keratinization, were associated with clinical parameters and clinical outcome of patients. Methods: A total of 81 patients who underwent curative surgical resection of diagnosed lung SCC, were enrolled in this study. Attributes such as keratinization, tumor budding, single cell invasion, and nuclear size within the tumor, as well as immunohistochemistry of Bcl-xL and pS6 expressions, were evaluated. Results: The keratinizing and nonkeratinizing subtypes did not differ with respect to age, sex, TNM stage, and morphologic parameters such as nuclear diameter, tumor budding, and single cell invasion at the tumor edge. Most patients with the keratinizing subtype (98.0%) had a history of smoking, whereas the nonkeratinizing group had a relatively higher proportion of never-smokers relative to the keratinizing group (24.0% vs. 2.0%; p=0.008, chi-square test). Expression of pS6 (a surrogate marker of mammalian target of rapamycin complex 1 [mTORC1] signaling that regulates keratinocyte differentiation), and Bcl-xL (a key anti-apoptotic molecule that may inhibit keratinization), did not correlate significantly with the presence of keratinization. Patients with the keratinizing subtype had a significantly shorter overall survival (85.2 months vs. 135.7 months, p=0.010, log-rank test), and a multivariate analysis showed that keratinization was an independent, poor prognostic factor (hazard ratio, 2.389; 95% confidence interval, 1.090-5.233; p=0.030). Conclusion: In lung SCC, keratinization is associated with a poor prognosis, and might be associated with smoking.

• 대한소아치과학회지
• /
• 제26권1호
• /
• pp.172-184
• /
• 1999

The present study was performed to identify morphologic sub-groupings in Korean children with Class I malocclusions, and to find out anatomic differences between the sub-groups. Standardized lateral cephalometric radiographs of 152 Korean children, aged between 6 and 12 years, with Class I malocclusions were analyzed by the Counterpart Analysis. A statistical method, Ward's Minimum Variance Cluster Analysis, was employed to divide the sample into sub-groups those with similar morphologic characteristics. The results were as follows; 1. There appeared two facial types, Type I and Type II, in Korean children with Class I malocclusions, 48.7% and 51.3%, respectively. 2. In both sub-groups, there existed strong Class III skeletal patterns due to a counterclockwise rotation of the Middle Cranial Fossa alignment, and strong Class II skeletal patterns due to the long Posterior Maxillary vertical dimension and a clockwise rotation of the Ramus alignment. 3. There were no significant differences in Upper Anterior Facial Height between Type I and Type II, $52.6{\pm}2.92mm\;and\;52.8{\pm}3.23mm$, respectively. 4. The Lower Anterior Facial Height in Type II was longer ($66.0{\pm}4.03mm$) due to the long Posterior Maxillary vertical dimension, the clockwise rotation of the Ramus alignment, and a clockwise rotation of the Mandibular plane alignment than that of Type I ($64.2{\pm}4.15mm$).