• Journal of the Korean Home Economics Association
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• v.2 no.1
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• pp.198-210
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• 1960

• Proceedings of the Korea Information Processing Society Conference
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• 2023.11a
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• pp.475-478
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• 2023

컴퓨터 단층촬영(CT)을 활용한 골격근 단면적은 근감소증과 관련된 기능을 평가하는 데 사용된다. 일반적인 근감소증 연구는 요추 3번의 골격근량을 주로 보지만 암 또는 폐절제술과의 상관관계를 예측하기 위한 다양한 연구에서는 흉추 4번, 7번, 8번, 10번, 12번 다양한 수준의 골격근량으로 연구를 진행하고 있음을 알 수 있다. 본 논문에서는 흉부와 복부 CT 영상에서 근감소증 진단을 위해서 흉추와 요추의 영역별 슬라이스를 검출하기 위해서 CNN 구조의 EfficientNetV2를 전이학습하여 인공지능 모듈을 개발하였다. 인공지능 모듈은 전체 흉부 및 복부 CT 영상에서 Cervical, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, L1, L2, L3, L4, L5, Sacral 총 19 클래스를 검출하도록 하였다. Test 데이터셋을 사용하여 Confusion Matrix와 Grad-CAM으로 모델의 정확도를 시각화하여 보였으며 검증으로 인공지능 모듈의 정확성을 측정하였다. 끝으로 우리가 개발한 다기관 공동연구 지원플랫폼에 적용하여 시각화된 결과를 보였다.

• The korean journal of orthodontics
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• v.25 no.4
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• pp.465-485
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• 1995

The purpose of this study is to locate the proper position of the lower occlusal plane according to individual skeletal pattern. Cephalometric films of 234 subjects of the control group, 358 of the pretreatment group and 358 of the treated group were analyzed to study proper relationships between vertical dimension ratio(VDR) and lower occlusomandibular plane angle(LOM). The control group was divided into two subgroups by the age. The first subgroup consisted of 113 subjects of the age 14 years and under and with the mean age of 10.82 years. The other subgroup consisted of 113 subjects of the age 18 years and above with the mean age of 23.76 years. The pretreatment group was divided into three subgroups by the age. The first subgroup consisted of 274 subjects of the age 14 years and under with the mean age of 11.36 years. The second subgroup consisted of 54 subjects of the age 14 through 18 years with the mean age of 15.4 years. The last subgroup consisted of 30 subjects of the age 18 years and above with the mean age of 21.35 years. The treated group was also divided into three subgroups by the age. The first subgroup consisted of 145 subjects of the age 14 years and under with the mean age of 12.91 years. The second subgroup consisted of 166 subjects of the age 14 through 18 years with the mean age of 15.64 years. The last subgroup consisted of 47 subjects of the age 18 years and above with the mean age of 21.61 years. Cephalometric films of the sample were traced. Measurements were made to a hundredth using a program specifically prepared for this study, and the results were entered into a 486DX PC. Means and Standard deviations of all the veriables were calculated for each group. Correlation coefficients between pertinent variables were calculated. Significance tests on those coefficients, one-way ANOVA and t-tests between variables or groups were performed. On the basis of the results studied above, certain subjects were selected from the control and the treated groups to locate the proper position of the occlusal plane, and designated as the optimal occluaion group. The subjects of this optimal occlusion group had 1-3 mm overbite, 1-3 mm of overjet and less than 1.75 mm of curve of Spee. A total subjects of 187 in this group consisted 104 treated subjects and 83 control group. Regression analysis was carried out between VDR and LOM, and regression equations were tabulated for this optimal occlusion group. The results were as follows : 1. Highly significant correlations were observed between various variables useful for identifying vertical component of skeletal frame, but any one particular variable did not accurately indicate the magnitude of anterior vertical overbite. 2. Of the variables useful identifying vertical component of skeletal frame, The VDR showed the highest correlation to the LOM. 3. Of the total sample, 80 percent had overbite within the normal range, irrespective of VDR. 4. The optimal occlusion group was divided into 9 subgroups by the age and the anteroposterior skeletal pattern, and correlation coefficient and determination coefficient between VDR and LOM of each group were calculated. Correlation coefficients and determination coefficients were found to be significantly high in all groups. 5. Regression equation was induced for each of the optimal occlusion group to find proper LOM according to the VDR. 6. It was found that the mean value of the cant of occlusal plane itself is not enough for a diagnosis and a treatment plan. Rather, It is very important to locate the proper occlusal plane for an Individual skeletal pattern.

• Journal of Dental Rehabilitation and Applied Science
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• v.26 no.3
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• pp.349-357
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• 2010

Physical factors and intra- and extra-oral factors of a patient have to be considered in order to decide a treatment plan for the skeletal class III malocclusion patient. Most of cases, the pre-prosthodontic treatment requires the orthodontic approaches and maxillofacial surgery. However, in some cases, patients' economic or medical condition makes impracticable situation for the orthodontic or surgical intervention. For those cases, the compromised prosthetic treatment which provides more stable and persistent occlusal stabilization is recommended. In this case report, a woman patient has a skeletal class III maxillomandibular relationship and misses multiple teeth. The prosthetic treatment without orthodontic and surgical intervention is performed due to her physical problem. The functional and esthetic results are achieved by the fixed prosthesis.

• Journal of the Korea Convergence Society
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• v.8 no.2
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• pp.43-51
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• 2017

The purpose of this study was to identify correlations between the musculoskeletal symptoms and job stress of occupational therapists at rehabilitation hospitals. To this end, the study conducted a survey on 210 occupational therapists at rehabilitation hospitals located in Seoul and Gyeonggi-do between June 1 and July 30, 2014. The average age of the subjects who participated in this study was $25.4{\pm}3.4$ years old, and their average work period was $2.3{\pm}2.1$ years. The subjects included 151 women (71.9%) and 171 permanent workers (81.4%). Among the subjects, 114 individuals (54.3%) had experienced a musculoskeletal symptom, and their major affected areas included hands/fingers (21%) and legs (18.6%). The percentage of high risk group of job stress was higher in musculoskeletal symptom group. And the proportion of high risk for job stress was higher in females. In particular, males showed significant differences in 'job demands', 'inappropriate reward', 'occupational climate' and females showed significant differences in 'Interpersonal conflict', 'inappropriate reward'(p<0.05).

• The korean journal of orthodontics
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• v.33 no.1 s.96
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• pp.41-49
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• 2003

This study examined the relations between degree of posterior dental compensation and skeletal discrepancy in Class III malocclusion. The pretreatment lateral cephalogras and dental casts of 87 skeletal Class III adults were selected to provide a random sampling of skeletal Class III malocclusion. Skeletal discrepancy was described with ANB angle, Wits appraisal, SN-Mn plane angle, FMA and ratios of basal arch width. Degree of posterior dental compensation was described with maxillary intermolar angle, mandibular interolar angle and sum of intermoloar angle. The relationships between skeletal discrepancy and degree of posterior dental compensation were analyzed with simple correlation analysis, stepwise multiple regression analysis. The results were as follows 1. A strong association was found between the variation in the anteroposterior measure, ANB angle and the variation of posterior dental compensation measures, sum of intermolar angle and mandibular intermolar angle in skeletal Class III malocclusion. 2. There was no statistically significant relationship between the variation in the vertical measures and the variation of posterior dental compensation measures in skeletal Class III malocclusion. 3. There was no statistically significant relationship between the variation in the anteroposterior and vortical measures and degree of basal arch width discrepancy.

• Journal of Life Science
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• v.26 no.5
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• pp.592-602
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• 2016

This study investigated the muscular dystrophin levels in freely moving Australian cattle mainly fed grass, freely moving Korean cattle fed mainly a grain diet, and Korean cattle fed a grain diet but housed in a relatively limited space of a cow house. The total skeletal muscle specimens of 244 cattle were collected and immediately fixed in 10% neutral formalin. The same area was biopsied from the cattle in both countries. The findings showed that fatty infiltration is highly correlated with membrane-associated protein degradation in skeletal muscle, and that among several membrane-associated proteins, dystrophin showed the most significant reduction in expression in the cattle with fatty infiltration. Similarly, CD36 was more highly expressed in the cattle with fatty infiltration of skeletal muscle. Various breeding factors, such as oxidative stress; the presence of oxidized lipids in the diet; and environmental factors such as exercise, temperature and amount of time spent, may have critical effects on the degradation of normal cytoskeleton proteins, which are required for maintaining normal skeletal muscle architecture. Among the sarcolemma membrane-associated proteins, dystrophin is the most sensitive membrane protein that is involved muscular dystrophy and muscular degeneration. Thus, the present findings may be useful for studies on muscular dystrophy in humans or the pathogenesis of muscular diseases in animal models.

• Journal of Digital Convergence
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• v.11 no.9
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• pp.209-219
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• 2013

The purpose of this study is to investigate the prevalence and to describe the correlation between the working period and musculoskeletal diseases of 119 rescuers. We conducted 485 surveys from 547 rescuers working in Gyeonggi-do from November 5 to December 20, 2011. The collected data were analyzed by cross tabulation analysis, chi-square test, and correlation analysis using PASW 18.0. The p value was set at p<.05. The prevalence of musculoskeletal diseases, 328(67.6%) rescuers suffering from musculoskeletal diseases. General characteristics included gender(p<.01), age(p<.01), marriage(p<.001),household chores(p<.05), working period(p<.001). The correlation between physical loading of subjects and musculoskeletal diseases was significant(p<.001). The rescuers felt the pain at lower back(36.4%), shoulders(19.2%), neck(14.9%), hip/ankles(13.2%), hand/wrist/fingers(12.0%), elbow(4.3%). This study showed that working period and physical loading affect musculoskeletal diseases.

• The korean journal of orthodontics
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• v.29 no.3 s.74
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• pp.339-347
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• 1999

The purpose of this study was to investigate the variations of the skeletal and dentoalveolar dimensions in relation to vertical facial patterns. Lateral cephalogram of 200 cases (100 cases of male and 100 cases of female, average age of which was 23.2 years) were traced and some measurements of skeletal and dentoalveolar dimensions were measured. The ratio of UAFH/LAFH was employed to classify the samples into groups of excess and short lower anterior facial height. And the comparison between two groups were taken statistacally. The following results were obtained. 1. The dentoalveolar height, lower anterior facial height, lower genial angle, and FMA in the excess-lower-anterior-facial-height group were significantly larger than those in short-lower-anterior-facial-height group. 2. The dentoalveolar height, facial height, ramus height, and Jarabak ratio in the male subjects were significantly larger than those in the female subjects. 3. The UAFH/LAFH ratio showed a significant correlation to upper, lower facial height, AUDH, PUDH, ALDH, PLDH, Lower gonial angle, FMA, and $Bj\"{o}rk's$ Sum.

• The korean journal of orthodontics
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• v.25 no.2 s.49
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• pp.175-185
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• 1995

This study was undertaken to investigate the activities of genioglossus and orbicularis oris muscle between normal occlusion and anterior open bite group. 39 subjects without the experience of orthodontic treatment and T.M.disorder were selected for this study. 20 subjects were normal occlusion. 19 subjects were anterior open bite. The twenty items were measured from the cephalometric headplates, and EMG recording of the genioglossus, orbicularis oris muscle were taken at rest position, water swallowing, jaw opening, isometric tongue protrusion, maximum tongue protrusion. All data were analyzed and processed with the computer statistical method. The following results were obtained: 1. Except at rest position. the muscle activities of genioglossus muscle in anterior open bite were higher than in normal occlusion with singificatn difference. 2. Except druing water swallowing, the muscle activities of orbicularis oris muscle in anterior open bite were higher than in normal occlusion with significant difference. 3. During maximum tongue protrusion, the geniolossus muscle of anterior open bite subjects showed the highest muscle activity. 4. Anterior open bite showed closer interrelationship between facial morphology ad the genioglossus, orbiculars oris muscle activities than that of nomral occlusion with significatn difference.