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유체-구조 연성해석과 유체해석의 비교를 통한 연료레일에서의 맥동저감 특성 연구
심정연(Jeong-Yeon Shim),김동현(Dong-Hyun Kim),조윤태(Yun-Tae Cho) 한국유체기계학회 2006 유체기계 연구개발 발표회 논문집 Vol.- No.-
Complex pressure pulsation phenomenon in fuel rails is generated by rapid opening and closing of injectors and it commonly causes undesirable noise. In the previous study, fluid-structure interaction analyses based on FEM had been conducted to examine the pulsation damping characteristics for different shapes of fuel rails. The results showed that the fuel rail with a high aspect ratio rectangular cross section seems to be best in order to reduce the pressure pulsations as shown in the previous experimental test by Mizuno, K. et al. In this study, CFD analyses (the fuel rail is regarded as a rigid structure.) have been performed to compare with the fluid-structure interaction analyses. And also the modal analyses for the fuel rails are performed to examine the correlation between the structural behavior and pressure pulsation.
안검에 발생한 원발성 피부 세포표면항원무리 30 양성 림프구증식 질환1예
이상흔,유혜린,심정연.Sang-Hun Lee. M.D.. Helen Lew. M.D.. Jeong-Yun Shim. M.D. 대한안과학회 2005 대한안과학회지 Vol.46 No.7
Purpose: To report one case of lymphoproliferative disorder on the upper eyelid. Methods: Primary CD30+ lymphoproliferative disorder on the skin is very rare. A 31-year-old female patient visited our clinic complaining of red, erosive papules on the right upper eyelid and on the left flank for two weeks. A 2.0 cm erythematous papule showed central ulceration. A 1.5 cm lymph node enlargement was palpated on the left groin. There was no abnormal finding on the slit-lamp test. Computed tomography showed a subcutaneous nodule on the anterolateral aspect of the flank and a lymph node enlargement on the left inguinal area. There was no evidence of other visceral involvement. Histopathologic finding showed diffuse infiltration of atypical cells with lobated nuclei showing multifocal positivity to CD30; a finding consistent with primary cutaneous CD30+ T-cell lymphoproliferative disorder and borderline lesion. Results: This case seems to be a borderline case between CD30+ T-cell large cell lymphoma and lymphoid papulodesis. We are conducting conservative care and observing the progress on the skin lesion for further evaluation.
김은서,이용희,심정연,유영석,Kim Eun-Seo,Lee Yong-Hee,Shim Jeong-Yun,Yoo Yeong-Seok 대한두경부종양학회 2000 대한두경부 종양학회지 Vol.16 No.2
Mucosal melanoma of the head and neck is a rare and usually lethal disease. Primary laryngeal malignant melanoma(LMM) are exceedingly rare tumors that morphologically are readily confused with more common types of laryngeal cancer. Treatment of choice for LMM is complete surgical excision and elective lymph node dissection is usually not recommended. The use of radiation or chemotherapy is generally thought to have no effect on local or distant disease and currently used as adjuvant therapy. The prognosis is extremely poor. We have experienced a 61 year old male patient with symptoms of foreign body and lump sense in throat. A dark pigmented polypoid mass was found on the right aryepiglottic folds with normal mobility of vocal cord. Total laryngectomy was performed under the diagnosis of malignant melanoma. Bone scan revealed multiple bony metastasis on ribs and lumbar vertebrae after 5 months of operation. There have been no evidence of recurrence at primary area. The patient died after 8 months of operation.
신동우,정웅윤,심정연,박정수,Shin Dong-Woo,Chung Woung-Youn,Shim Jeong-Yun,Park Cheong-Soo 대한두경부종양학회 1997 대한두경부 종양학회지 Vol.13 No.2
Parotid canalicular adenoma is a benign neoplasm that is predominantly composed of branching and interconnecting cords of single or double rows of columnar epithelium in a very loose stroma. There has been considerable confusion in the literature concerning the terminology of canalicular adenoma. However, thesedays it has been newly-recognized as a discrete entity of the monomorphic adenoma group. Canalicular adenoma has a remarkable predilection for occurrence in the minor salivary glands such as the upper lip, in contrast with basal cell adenoma that occurs predominantly in major salivary glands such as the parotid gland. We have experienced a case of canalicular adenoma of the parotid gland in a 65-year-old woman. The patient had a palpable mass on the preauricular area for the last 15 years and recently noticed a mild pain and discomfort on the mass. Neck ultrasonography showed a low echogenic mass of 1.0cm in diameter in the right parotid gland and a neck CT scan showed a well-enhanced rectangular-shaped mass. A superficial parotidectomy was performed for the lesion and the final pathologic diagnosis turned out to be 'multifocal canalicular adenoma'.
Insular Component가 공존한 고분화 갑상선암
정웅윤(Woong Yoon Chung),심정연(Jeong Yun Shim),박정수(Cheong Soo Park) 대한두경부종양학회 1997 대한두경부 종양학회지 Vol.13 No.1
We have experienced 5 cases of unusual well differentiated thyroid carcinoma with insular component during the past 5 years. 4 cases were presented with cervical masses but I case (patient 2.) was initiallty with lung and brain metastasis. The tumors from 4 cases showed invasive growths but that of 1 cases(patient 1.) showed intrathyroidal. Total thyroidectomy and cervical lymphnode dissection(CCND or RND) was performed in 4 cases but only RND was performed in spite of mediastinal metastasis of the tumor in patient 5 under the patient's choice. During the follow-up period, we also performed radical nephrectomy and metastatectomy for the kidney and iliac bone metastasis respectively, in patint 2. Microcsopically, the tumors showed the insular growth patterns, focally(less than 50%) in 3 cases and predominantly(more than 75%) in 2 cases. And the insular componentas were combined with papillary carcinoma in 2 cases and follicular carcinoma in 3 cases. Cervical lymphnode metastases were confirmed in 4 cases. Patient 2 died of disease with metastases to lung, brain, bone and kidney, 52 months after initial therapy. Patient 1, 3 and 4 are alive and have no recurrence and distant metastasis. Patient 5 is also alive with the mediastinal metastasis. In our experience, the well differentiated thyroid carcinomas with insular component showed characteristic histologic features, aggressive behavior in initial presentation and unfavorable prognosis regardless of the percentage of the insular component.
박정수(Cheong Soo Park),심정연(Jeong Yun Shim),정웅윤(Woung Youn Chung),신동우(Dong Woo Shin) 대한두경부종양학회 1997 대한두경부 종양학회지 Vol.13 No.2
Parotid canalicular adenoma is a benign neoplasm that is predominantly composed of branching and interconnecting cords of single or double rows of columnar epithelium in a very loose stroma. There has been considerable confusion in the literature concerning the terminology of canalicular adenoma. However, thesedays it has been newly-recognized as a discrete entity of the monomorphic adenoma group. Canalicular adenoma has a remarkable predilection for occurrence in the minor salivary glands such as the upper lip, in contrast with basal cell adenoma that occurs predominantly in major salivary glands such as the parotid gland. We have experienced a case of canalicular adenoma of the parotid gland in a 65-year-old woman. The patient had a palpable mass on the preauricular area for the last 15 years and recently noticed a mild pain and discomfort on the mass. Neck ultrasonography showed a low echogenic mass of 1.0cm in diameter in the right parotid gland and a neck CT scan showed a well-enhanced rectangular-shaped mass. A superficial parotidectomy was performed for the lesion and the final pathologic diagnosis turned out to be 'multifocal canalicular adenoma'.
Henoch-Schonlein 자색반증을 동반한 강직성 척추염
류경희 ( Kyung Hee Ryu ),채윤태 ( Yun Tae Chae ),고은향 ( Eun Hyang Ko ),문재현 ( Jae Hyun Moon ),홍성관 ( Sung Kwan Hong ),심정연 ( Jeong Yun Shim ),홍승재 ( Seung Jae Hong ) 대한내과학회 2005 대한내과학회지 Vol.69 No.-
Cutaneous leucocytoclastic vasculitis in patients with ankylosing spondylitis is rarely reported. Such an association might not be coincidental, as serum immunoglobulin A (Ig A) levels are reported to be high during the active inflammatory phases of ankylosing spondylitis and cutaneous leucocytoclastic vasculitis. But this finding supports the concept of abnormal Ig A immune stimulation in pathogenesis of ankylosing spondylitis and cutaneous leucocytoclastic vasculitis. We report a 17 year-old male patient with ankylosing spondylitis accompanying with H-S purpura who initially presented with fever, abdominal pain, swelling and palpable pur-pura. Cutaneous biopsy showed neutrophilic infiltration of blood vessel wall with marked leukocytoclasia and fibrinoid necrosis of dermal vessels with extravased erythrocytes. The purpuric rash disappeared in one month without specific treatment. The patient was treated with indometacin and Sulfasalazine. (Korean J Med 69:S959-S963, 2005)
임신 제 2 삼분기에 초음파 검사로 진단된 방광외번증 1 예
조성우(Sung Woo Cho),이은혜(Eun Hye Lee),심정연(Jeong Yun Shim),장성운(Sung Woon Chang) 대한산부인과학회 2002 Obstetrics & Gynecology Science Vol.45 No.6
Bladder exstrophy is a rare congenital malformation in which the anterior wall of the bladder is absent, and the posterior wall is exposed. Because of the poor prognosis, prenatal diagnosis is important. We present a case of bladder exstophy which was presented as a solid mass in the lower part of the fetal abdomen instead of fluid-filled urinary bladder, and confirmed at autopsy after termination of pregnancy. To the best of our knowledge, this is the first report of bladder exstrophy prenatally diagnosed in the Korean literature.
골반내 후복막강의 obturator fossa에서 발생한 양성 신경초종
이상걸(Sang Geol Lee),이은혜(Eun Hye Lee),심정연(Jeong Yun Shim),이찬(Chan Lee),신명철(Myung Choel Shin),이위현(Wee Hyun Lee) 대한산부인과학회 2000 Obstetrics & Gynecology Science Vol.43 No.2
The schwannoma is a benign neoplasm originating from Schwann cell. Solitary nerve sheath tumors such as benign schwannomas arising in the pelvic retroperitoneum are infrequently reported. Those tumors can indeed be misdiagnosed for other more common conditions both clinically and instrumentally. We report a very rare case of a benign retroperitoneal pelvic schwannoma of the obturator fossa, which was incidentally found and misdiagnosed as adnexal mass preoperatively in fifty one-years-old postmenopausal women.