독일産業革命의 特徵

羅慶洙 慶北大學校 經商大學 經濟學科 1981 慶商大學論集 Vol.9 No.-

디지탈 공제 방사선 촬영술에 있어서 기계적 및 투사적 규격화의 평가

나경수,조봉혜,최봉인 大韓口腔顎顔面 放射線學會 1998 Imaging Science in Dentistry Vol.28 No.1

The following conclusions were obtained from the non-reconstructed and reconstructed subtraction images of the standard intraoral radiographs which were taken with paralleling technique with Rinn XCP only and with occlusal bit registration for geometric standardization using bilateral mandibular premolar and molar regions of two dry human skulls. 1. The SD of the overall subtraction images of the premolars and molars of the non-reconstructed, that in, the manual superimposition showed statistically significant difference between the non-registered and registered groups. 2. In non-reconstructed and non-registered cases, the quality of the subtraction images were improved when superimposition was focally done and this was more evident in areas where the radiographic images tend to be distorted due to anatomic reasons. 3. In non-reconstructed and registered cases, the subtraction images were consistent regardless of the anatomic site or the focus of superimposition. This means that the geometric standardization with only occlusal bite registration could produce serial radiographs which is suitable for subtraction. 4. The SD of the overall subtraction images of the premolars and molars of the reconstructed, that is, the automatic superimposition showed statistically insignificant difference between the non-registered and registered groups. This means that using reconstruction, subtraction radiography is possible without occlusal bit registration. 5. In reconstructed and non-registered cases, compatible quality of the subtraction images were obtained regardless of the anatomic site or area of the corresponding points. 6. In reconstructed and registered cases, best subtraction images whose quality showed sensitivity to the areas of corresponding points were obtained.

가토 악하선의 조영제 주입후 방사선 및 조직학적 연구

나경수 大韓口腔顎顔面 放射線學會 1990 Imaging Science in Dentistry Vol.20 No.1

50 submandibular glands of rabbits were examined historadiologically after infusion with normal and over volumes of physiologic saline and 5 radiographic contrast media. The results were as follow: 1. All water soluble contrast media showed similar radiographic contrasts and absorbed about 5 minutes after infusion expert Telebrix 30 which took 30 minutes in both normal and overfilled glands. 2. Lipid soluble medium, Lipiodol UF had excellent radiographic contrast and could be seen on the radiograms even after 24 hours after infusion. 3. Salivary glands infused with physiologic saline didn't show any histologic changes except slight duct right after infusion. 4. Telebrix 30 caused mild to moderate duct dilation and inflammation at immediate & 24 hours after infusion which was more severe in overfilled glands. At 7 days after infusion, there were mild to moderate fibrosis of the gland and areas of necrosis was seen in overfilled glands. 5. Hypaque 60% showed similar histologic reactions to Telebrix 30 except more severe tissue destruction at 7 days after infusion. 6. Urografin 60% showed mildest histologic changes among the media used in the study. 7. Biliscopin had mild duct dilation which returned to normal after 7 days but there were moderate inflammation and tissue necrosis at that time. 8. Lipiodol UF showed severe duct dilation with numerous vacuoles and there were tissue fibrosis at 7 days after infusion but no tissue necrosis was seen.

현대기업의 동향

羅慶洙 경북대학교 교육대학원 1971 논문집 Vol.2 No.-

The Marshallian firm, which was organized at the factory level and confined its activity to a single industry and a single national economy, gave way to the modern corporation. The modern corporation is far cry from the Marshallian firm in both its vision and sphere of activity. This movement began in the 1920 and gathered its momentum after the Second World War. The characteristics of modern corporation consists in its global outlook and its transformation to the stage of multi-national and multi-industrial (conglomerate) enterprise. Multi-national corporation integrates one industry over many countries as in the automobile industry. On the other hand, conglomerate or multi-industrial enterprise integrates many industries over one country as in the textile industry. In this essary, I intended to examine many points in connection with the multi-national and conglomerate enterprises. These are as follows: the relationship between the rise of multi-national enterprise and the increasing direct investment of U.S.A. in Europe, the true nature of multinational enterprise, the process of multinati-onalisation of enterprise, the rise of C onglomerate mergers and governmental reactions, the reasons that give rise to conglomerate mergers, and their impacts on the modern capitalism.

측두하악관절 자기공명영상에서의 삼출에 관한 연구

나경수 大韓口腔顎顔面 放射線學會 2003 Imaging Science in Dentistry Vol.33 No.1

Purpose : The purpose of this study was to investigate the distribution and frequency of temporomandibular joint (TMJ) effusion in magnetic resonance (MR) images of patients with disc displacements. Materials and Methods : On T2 weighted MR images of 148 TMJs taken from 74 patients presenting with TMJ pain and dystunction, we assessed the cases showing TMJ effusion, defined as an amount of fluid that exceeded the maximum amount seen in a control group of asymptomatic volunteers. The amount of TMJ fluid was graded as : Ⅰ (none or minimal), Ⅱ(moderate), Ⅲ (marked), and Ⅳ (extensive), according to a standard set by a reference. Disc displacement categories were also recorded. Results : Of the 148 TMJs examined in this study, 52 joints (35.1%) presented with joint effusion, 24 (16.2%) showing bilateral joint effusion. 38 joints showed upper joint space effusion, 3 showed lower joint space effusion, and 11 showed both upper and lower joint space effusion. 96 joints (64.9%) had grade Ⅰ joint fluid, 27 (18.2%) grade Ⅱ, 15(10.1%) grade Ⅲ, and 10(6.8%) grade Ⅳ. 80.0% of the joints presenting with grade Ⅳ effusion showed disc displacement without reduction. Conclusion : Joint effusion was found not only in upper, but also in lower joint spaces. The higher the effusion grade, the greater the frequency of disc displacement without reduction.

측두하악관절증에서 자기공명영상을 이용한 측두하악관절의 관절강 평가

나경수 대한구강악안면방사선학회 2007 Imaging Science in Dentistry Vol.36 No.1

Purpose : Disc and condylar position were observed on MRIs of temporomandibular joint disorder patients and condylar position agreement between MRI and tranascranal radiography was evaluated. Materials and Methods : MRI and transcranial radiographs of both TM joints from 67 patients with temporo-mandibular disorder were used. On MRI, the position and shape of disc and condylar position as anterior, middle, posterior was evaluated at medial, center, and lateral views. On transcranial radiographs, condylar position was evaluated using the shortest distance from condyle to fossa in anterior, superior, and posterior directions. Results : 1. On MRI, 96 joints (71.6%) of 134 had anterior disc dispalcement with reduction and 38 joints (28.4%) without reduction. 2. Fourteen (14.6%) of 96 reducible joints showed anterior condylar position, 19(19.8%) showed central position, 63 joints (65.6%) showed posterior position. Two joints (5.3%) of 38 non-reducible joints showed anterior condylar position, while 9(23.7%) showed central position, and 27 (71.l%)-posterior position. 3. In 85 joints (63.4%) of 134, the transcranial condylar position agreed with that of the central MRI view, 10 joints (7.5%) with that of medial, 16 joints (11.9%) with that of lateral, and 23 joints (17.2%) disagreed with that of MRI. Conclusion : On MRI, most of the reducible and non-reducible joints showed posterior condylar position. Transcranial radiographs taken with machine designed for TMJ had better agreement of condylar position with that of MRI. Extremely narrow joint spaces or very posterior condylar positons observed on transcranial radiographs had a little more than fifty percent agreement with those of MRIs. (Korean J Oral Maxillofac Radiol 2007; 37: 15-8)

日本의 産業革命初期의 金融構造

羅慶洙 慶北大學校 經商大學 經濟學科 1979 慶商大學論集 Vol.7 No.-

치아와 관련되어 나타나는 악골의 혼합병소에 관한 연구

나경수 大韓口腔顎顔面 放射線學會 2000 Imaging Science in Dentistry Vol.30 No.1

Purpose : 1. Retrospectively evaluate the accuracy of tentative diagnosis or impression from the clinico-radio-graphic materials of jaw lesions which showed mixed lesions associated with teeth. 2. To observe the diagnostic importance of the calcified part of the lesions which appear as radiopaque areas. Materials and Methods : 14 cases of jaw lesions which showed mixed lesions associated with teeth were reviewed. These lesions were mostly diagnosed as adenomatoid odontogenic tumors (6 cases) or calcifying odontogenic cysts with (4 cases) or without odontomas (4 cases). The calcified elements of the lesions which demonstrated various sizes and patterns of radiopaque shadows resembled odontoid tissues in some cases but could not be defined in some other cases radiographically. Results : The final histopathologic diagnosis confirmed adenomatoid odontogenic tumors in 4 of the 6 cases. The remaining 2 cases turned out to be odontoma and ameloblastic fibroodontoma, The 4 cases of calcifying odontogenic cysts with odontomas were correct in 3 cases but remaining 1 case was just odontoma. The 4 cases of calcifying odontogenic cysts were proved to be odontogenic keratocyst, calcified peripheral fibroma, unicystic ameloblastoma and squamous cell carcinoma. Conclusion : The diagnostic accuracy of the adenomatoid odontogenic tumors and calcifying odontogenic cysts were high when the lesions show typical appearance. The calciflcations which show radiopaque areas could be odontomas or dystrophic calficifations or remnants of bone fragments from resorption. (Korean J Oral Maxillofac Radiol 2000; 30: 1-10)

경두개촬영 및 Polytome-U 촬영에서의 하악과두위 비교

나경수,조봉혜 大韓口腔顎顔面 放射線學會 1998 Imaging Science in Dentistry Vol.28 No.2

The authors examined the condylar position and shape of condylar process from the transcranial radiographs and polytomographs of the 130 temporomandibular joints of 65 patients who complained symptoms of temporomandibular disorder and the followings were obtained; 1. The age and sex distribution of 65 patients showed peak incidence in 2nd decade (27.7%) followed by 3rd (18.5%) and 4th decade (18.5%) and female predominance (87.7%) 2. In polytomography 64 joints (49.2%) showed consistent condylar position from lateral to medial and 39 joints (30.0%) of them showed agreement with those of transcranial radiographs. Among the 66 joints (50.8%) which showed changes in condylar position, 48 joints (36.9%) showed agreement with lateral and central tomographic and transcranial radiographic position. 41 joints (31.5%) showed disagreement in condylar position between the polytomographic and transcranial radiographic images. 3. When the condylar position was classified as anterior, central and posterior, the posterior position was the most frequent position, that is, 42.3% of the transcranial radiography and 42.3%, 49.2% and 38.5% of the lateral, central and medial polytomographic radiographs. 4. In polytomography 84 joints (64.6%) showed consistent condylar shape from lateral to medial and 74 joints (56.9%) of them showed agreement with those of transcranial radiographs. Among the 46 joints (35.4%) which showed changes in condylar shape, 40 joints (30.1%) showed agreement with lateral and central tomographic and transcranial radiographic shape. 41 joints (31.5%) showed disagreement in condylar shape between the polytomographic and transcranial radiographic images.

Polytome-U 촬영법을 이용한 측두하악관절증의 하악과두 골변화 관찰

나경수 大韓口腔顎顔面 放射線學會 1998 Imaging Science in Dentistry Vol.28 No.2

The author examined bone changes from 1274 polytomographic images of 182 temporomandibular joints which showed symptoms of temporomandibular disorder and the following results were obtained; 1. The number of temporomandibular joints which showed bone changes were 64 (35.2%) among 182 joints 2. The age and sex distribution of 64 joints which had bone changes showed the prevalence of female (90.6%) and third decade (25.0%) followed by fourth (21.2%) and second decade (17.2%). 3. The 252 images which showed bone changes consisted of 56 images from lateral side (22.2%), 118 images from center (46.8%) and 78 images from medial side (30.9%). 4. The most frequently observed bone changes were flattening (22.7%) followed by sclerosis (19.3%) and cortical unsharpness (19.3%)