ON THE HEDGING PRICES OF EUROPEAN AND AMERICAN OPTION

I, S-H 한국전산응용수학회 1999 Journal of applied mathematics & informatics Vol.6 No.2

In this paper we obtain relation between the heding prices in European and American option and apply to call option.

韓国学習者の日本語動詞獲得モデル: 学習者総体モデルとの比較 ― 「多言語母語の日本語学習者横断コーパス」の絵描写作文を用いた検証 ―

石川慎一郎 ( Shin’ichiro¸ Ishikawa ) 한국일어교육학회 2021 일본어교육연구 Vol.- No.56

本論文では「多言語母語の日本語学習者横断コーパス」(I-JAS)に含まれる韓国学習者(KLJ)による絵描写作文を習熟度レベルごとに分析し、KLJの動詞獲得過程のモデル化を試みた。分析結果は、同コーパスに含まれる海外日本語学習者の総体(WLJ)データを分析した石川(2021)と比較された。RQ1(動詞使用量)については、習熟度別に見た場合、KLJとWLJともに逆U字型のパタンを示すことが確認された。RQ2(マーカー動詞)に関して、母語話者との比較の結果、KLJが使用できない動詞には(a)複合動詞,(b)慣用動詞、(c)否定的ニュアンスを含む動詞など、KLJのみが使用する動詞には(d)意思·意図に関する誤用、(e)文脈の不適合、(f)複合動詞要素の誤用、(g)不要な内容の言語化などが含まれ、いずれもWLJと同じパタンを示すことが確認された。RQ3(習熟度分類)については、KLJの動詞獲得がⅠ(存在動詞·移動動詞など)→Ⅱ(動詞の拡張)→Ⅲ(複合動詞成分·アスペクト成分·サ変動詞など)→Ⅳ(高度な複合動詞成分·変化動詞など)の4段階に区分され、ほぼWLJに重なることが示された。RQ4(習熟度推定)については、7種の動詞(入る·為る·見る·仕舞う·知る·来る·入れる)の使用頻度によって習熟度を63%の精度で予測できるが、予測モデルに含まれる動詞はWLJの場合とは異なることが示された。動詞獲得におけるKLJの固有特性は限定的で、KLJの特徴の大部分は日本語学習者全般の特徴であると言える。この点をふまえれば、日本語学習者コーパス研究においては、L1差よりもL2習熟度差を優先した分析が必要だと考えられる。 Using the International Corpus of Japanese as a Second Language (I-JAS), this study analyzed the picture description essays written by Korean learners of Japanese (KLJ) at different L2 proficiency levels to explore the process of their acquisition of L2 Japanese verbs. The results were compared to the verb acquisition process of the whole learners of Japanese (WLJ) reported in Ishikawa (2021). The corpus-based analyses showed that (1) an inverted U pattern existed in terms of the number of tokens/ types of the verbs used in the essays for both KLJ and WLJ, (2) when compared to the verb usage of Japanese native-speakers (JNS), some verbs were used only by JNS and others only by KLJ, and these “marker” verbs were almost the same for KLJ and WLJ, (3) KLJ’s verb acquisition process could be subdivided into four stages: 1 (existential verbs/ verbs of moving), 2 (a greater variety of verbs), 3 (composite verbs and aspectual verbs), and 4 (complex composite verbs and verbs of change), which were almost identical to the patterns for WLJ, and (4) KLJ’s L2 proficiency could be explained by the frequency of seven types of verbs (hairu, suru, miru, shimau, shiru, kuru, ireru) with 63% accuracy, though these verbs were different from a set of verbs adopted in the regression model for WLJ. These findings corroborated that KLJ’s verb acquisition pattern did not differ much from the pattern for WLJ, which may suggest the need for the Japanese learner corpus studies focusing on learners’ L2 proficiency rather than on their L1 types.

Next generation sequencing-based salivary biomarkers in oral squamous cell carcinoma

Buyanbileg Sodnom-Ish,Mi Young Eo,Hoon Myoung,이종호,Soung Min Kim 대한구강악안면외과학회 2022 대한구강악안면외과학회지 Vol.48 No.1

Selection of potential disease-specific biomarkers from saliva or epithelial tissues through next generation sequencing (NGS)-based protein studies has recently become possible. The early diagnosis of oral squamous cell carcinoma (OSCC) has been difficult, if not impossible, until now due to the lack of an effective OSCC biomarker and efficient molecular validation method. The aim of this study was to summarize the advances in the application of NGS in cancer research and to propose potential proteomic and genomic saliva biomarkers for NGS-based study in OSCC screening and diagnosis programs. We have reviewed four categories including definitions and use of NGS, salivary biomarkers and OSCC, current biomarkers using the NGS-based technique, and potential salivary biomarker candidates in OSCC using NGS.

A 10-year survival rate of tapered self-tapping bone-level implants from medically compromised Korean patients at a maxillofacial surgical unit

Buyanbileg Sodnom-Ish,Mi Young Eo,Myung Joo Kim,Soung Min Kim 대한악안면성형재건외과학회 2023 Maxillofacial Plastic Reconstructive Surgery Vol.45 No.-

Background The 10-year survival rate of dental implants in healthy subjects is 90–95%. While in healthy individuals, dental implants have become commonplace to solve problems of edentulism, whether dental implant treatment is optimal in patients with systemic disease remains unclear. The purpose of this study is to investigate the clinical outcomes of tapered, sand-blasted, and acid-etched internal submerged dental implants installed in medically compromised patients in our maxillofacial surgical unit. Methods A total of 1019 Luna® dental implants were placed in 333 patients at the Department of Oral and Maxillofacial Surgery, Seoul National University Dental Hospital. Kaplan–Meier survival estimates after 10 years of follow-up were computed for healthy vs. medically compromised patients. Results The 10-year follow-up survival rate of 1019 Luna® dental implants in the Korean maxillofacial surgical unit was 97.0% with a mean follow-up of 41.13 ± 35.13 months (0–120 months). The survival rate was 97.0%, in which 31 implants were failed during the follow-up. Cumulative 10-year implant survival rates were 99.4% in healthy individuals without systemic disease and 95.9% in patients with systemic disease. Conclusions Comparable success and survival rates were achieved with those of implants in healthy patients. Preoperative general health assessments including laboratory test results and checking the previous medication records are essential in diagnosing any unrecognized conditions for improved implant success rates in medically compromised patients.

An accurate diagnosis of odontogenic cutaneous sinus tract by different computed tomography unit setting

Buyanbileg Sodnom-Ish,Mi Young Eo,Soung Min Kim 대한구강악안면외과학회 2021 대한구강악안면외과학회지 Vol.47 No.1

Due to their rarity and the lack of associated dental symptoms, odontogenic cutaneous sinus tracts (OCSTs) are often misdiagnosed and confused with cutaneous lesions or non-odontogenic infections. It has been estimated that 50% of individuals affected by OCSTs are subjected to inappropriate treatments before the correct diagnosis is established. We describe the diagnosis and treatment of two cases of OCSTs. By using a computed tomography (CT) with soft tissue window setting, the extent of cortical bone destruction and the path of the sinus tract in the soft tissue was easily identified. Thus, we recommend the use of imaging techniques such as CT, which can confirm the odontogenic origin and the exact location of the OCST.

Acquired synechia of the tongue to the mouth floor

Buyanbileg Sodnom-Ish,Truc Thi Hoang Nguyen,Mi Young Eo,Yun Ju Cho,Soung Min Kim,Jong Ho Lee 대한구강악안면외과학회 2021 대한구강악안면외과학회지 Vol.47 No.5

Sodium hydroxide or caustic soda is a corrosive agent that can cause extensive damage to the oral mucosa, lips, and tongue when ingested either accidentally or intentionally. These injuries include microstomia, shallow vestibule, ankyloglossia, speech impairment, loss of teeth and impairment in facial expression. In the present article, we report a unique case of tongue adhesion to the mouth floor and its surgical management in a 66-year-old female patient, who had a history of caustic soda ingestion.

Layered structure of sialoliths compared with tonsilloliths and antroliths

Buyanbileg Sodnom-Ish,Mi Young Eo,Yun Ju Cho,Mi Hyun Seo,Hyeong-Cheol Yang,Min Keun Kim,Hoon Myoung,Soung Min Kim 대한구강악안면외과학회 2024 대한구강악안면외과학회지 Vol.50 No.1

Objectives: The aim of this study was to perform a comparative analysis of the ultrastructural and chemical composition of sialoliths, tonsilloliths, and antroliths and to describe their growth pattern. Materials and Methods: We obtained 19 specimens from 18 patients and classified the specimens into three groups: sialolith (A), tonsillolith (B), and antrolith (C). The peripheral, middle, and core regions of the specimens were examined in detail by histology, micro-computed tomography (micro- CT), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy, and transmission electron microscopy (TEM). Results: In the micro-CT, group A showed alternating radiodense and radiolucent layers, while group B had a homogeneous structure. Group C specimens revealed a compact homogeneous structure. Histopathologically, group A showed a laminated, teardrop-shaped, globular structure. Group B demonstrated degrees of immature calcification of organic and inorganic materials. In group C, the lesion was not encapsulated and showed a homogeneous lamellar bone structure. SEM revealed that group A showed distinct three layers: a peripheral multilayer zone, intermediate compact zone, and the central nidus area; groups B and C did not show these layers. The main elemental components of sialoliths were O, C, Ca, N, Cu, P, Zn, Si, Zr, F, Na, and Mg. In group B, a small amount of Fe was found in the peripheral region. Group C had a shorter component list: Ca, C, O, P, F, N, Si, Na, and Mg. TEM analysis of group A showed globular structures undergoing intra-vesicular calcification. In group B, bacteria were present in the middle layer. In the outer layer of the group C antrolith, an osteoblastic rimming was observed. Conclusion: Sialoliths had distinct three layers: a peripheral multilayer zone, an intermediate compact zone and the central nidus area, while the tonsillolith and antrolith specimens lacked distinct layers and a core.

The Mongol Khaans and Taoism Before and During the Yuan Period

Bataa Mishig-Ish 동국대학교 불교학술원 2012 International Journal of Buddhist Thought & Cultur Vol.19 No.-

The thirteenth century Mongol invasion of China allowed the native religions of China not only to maintain a high level of autonomy, and but also compete with one another for gaining more influence with their new Mongol rulers. The case of Taoism in China was an excellent example. This paper explores the historical relationship of the Mongol khaans and Taoism from Chinggis Khaan’s reign to Ulziitumur’s reign, who succeeded Khubilai of the Yuan period. This relationship was indeed an interesting one as it reveals that spiritual leaders of influential Taoist sects had always sought for ways in which they could elevate the prestige of their Taoist sects and increase their spiritual supremacy over other religions such as Buddhism by gaining the favor of their Mongol rulers. Likewise, the Mongol Khaans realized the importance of the role of native Chinese religions, especially Taosim, in effective ruling agrarian China. This historical correspondence of the Mongol Khaans with Taoism can be attributed to personal, spiritual, and political benefits for the Mongol rulers, and spiritual and political influences gained by the Taoists for maintaining their institutional power over other faiths throughout Chinese society.

Atraumatic Removal of Displaced Implant in the Fatty Bony Marrow

Buyanbileg Sodnom-Ish,어미영,Truc Thi Hoang Nguyen,Yun Ju Cho,김명주,김성민 대한구강악안면임플란트학회 2019 대한구강악안면임프란트학회지 Vol.23 No.3

A 53-year-old Korean female was referred to the Department of Oral and Maxillofacial Surgery at the Seoul National University Dental Hospital. The patient’s chief complaint and concern involved the occasional feeling of discomfort and pain in the region of the lower right second molar. Panoramic radiograph revealed a #47 implant fixture that was dislocated horizontally deep in the fatty degenerated area of the posterior mandible. A rare case of implant displacement into the fatty degenerated area of the posterior mandible caused inferior alveolar nerve (IAN) compression. Fatty degeneration is a condition that occurs in mostly elderly female patients due to aging and is inevitable. We recommend accurate preoperative evaluation using radiographic imaging techniques such as computer tomography and histopathological analysis for differential diagnosis. Endoscopic intraoperative examinations can reduce the invasiveness of the surgery and provide accuracy in examining the intactness of the IAN. This case report suggests the efficacy of the selected method of treatment and, the removal of the displaced implant and decompression of the IAN using endoscopic visualization followed by 8 months of healing and two-stage implant installation with guided bone regeneration in cases of related implant complications.

Oral Manifestation of Unknown Hematopoietic Malignancy

오현준,Buyanbileg Sodnom-Ish,어미영,이주영,허경회,김성민 대한치의학회 2022 Journal of korean dental science Vol.15 No.2

Burkitt lymphoma is a highly aggressive type of hematopoietic malignancy that is comparatively common in children and young people. It is important that Burkitt lymphoma be diagnosed as early as possible for prompt intervention due to its rapidly progressive, high-grade malignant nature. Dentists, especially maxillofacial surgeons, can play a life-saving role in patients with such unknown malignancy as the first clinical or radiological manifestation might occur in the oral region.