• 한국군사과학기술학회지
• /
• 제21권5호
• /
• pp.583-590
• /
• 2018

Cross eye technique was proposed as an angle deception jamming technique against monopulse radars. Tracking radars use monopulse or conical scan methods for angle estimation of a target. Thus, if we verify deception performance of cross eye technique against a conical scan radar, efficient jamming systems can be developed to disturb both monopulse radars and conical scan radars. In this paper, we propose a mathematical model for a conical scan radar and a cross eye system. Using the proposed model, angular deception performance of the cross eye technique against conical scan radar is analyzed.

• 마케팅과학연구
• /
• 제7권
• /
• pp.147-165
• /
• 2001

인터넷비즈니스 기업이 고객과의 성공적인 관계유지를 위해서는 자신들이 구축한 고객베이스내 고객들간 태도나 구매행동패턴 차이에 대한 정확한 이해가 선행되어야 한다. 이러 한 맥락에서 본 연구는 인터넷 고객의 장기지향성에 영향을 미치는 선행변수와 장기지행성 간의 관계가 거래 특성변수인 거래기간에 따라 어떠한 차이가 있는지를 탐색적으로 살펴보 았다. 탐색적 연구문제를 검증하기 위해 인터넷 쇼핑몰에서 상품구매 경험이 있는 고객을 대상 으로 수집된 자료를 분석하고, 분석결과에 대한 전략적 시사점에 대해 논의하였다.

• Journal of Chest Surgery
• /
• 제9권2호
• /
• pp.287-292
• /
• 1976

This is a report of a case of congenital esophageal hiatus hernia, occurring in a younger child at the age of one year and two months. The child was suffered from vomiting (intermittently coffee-ground vomitus or blood-flecked vomitus), coughing, and high fever for about 3 months.Diagnosis was confirmed by the radiologic barium study of the gastrointestinal tracts. The herniated organs were entire stomach and a part of the transverse colon. They were located in the right chest. The etiologic pathology was mainly congenital developmental defect of the musculature of the diaphragm, forming the posterior margin of the esophgeal hiatus, and additionally slight shorted esophagus. After reduction of herniated organs back to the abdominal cavity through abdominal approach, herniorrhaphy was performed through transthoracic approach with modified Allison's procedure. At the same time, any associated anomalies, such as hypertrophic pyloric stenosis, were not seen. Postoperative course was uneventful.

• Journal of Chest Surgery
• /
• 제34권11호
• /
• pp.858-860
• /
• 2001

VATER 증후군은 심장의 기형을 동반하기 쉬운 복합기형이지만 적절하고 적극적인 수술적 치료에 의해 완치에 이를 수 있는 기형이다. 저자들은 VATER 증후군에 심장기형이 동반된 여아에서 적극적인 수술적 치료로 만족할만한 성과를 얻어 이 증례를 고찰과 함께 보고하는바이다.

• Journal of Chest Surgery
• /
• 제23권2호
• /
• pp.285-298
• /
• 1990

The records of 67 patients who had been operated as an esophageal cancer during the period from 1973 to 1989 at the Department of Thoracic and Cardiovascular Surgery, Hanyang University Hospital were reviewed retrospectively. The results were summarized as follows ; The age ranged from 28 years old to 80 years old. The highest incidence was 5th decades, then 6th decades, and the incidence of male was 10 times as the incidence of female[M:F= 10.16: 1]. The locations were lower esophagus 44%, middle esophagus 38.8%, upper esophagus 11.9% and cervical esophagus 4.4% The frequent symptoms were dysphagia [88%], epigastric or substernal pain and discomfort [29.8%], weight loss [20.8%], and laryngeal dryness [1.4%]. The most common interval between the onset of dysphagia and admission was 2-3 months; 82% of patients was within 6 months, The cancer consisted of stage I [3%], stage II [11.9%], stage III[47.6%], and stage IV [33.7%] The resectability of cancer was 67%. The organs of substitute were stomach in 21 cases, right colon 6 cases, and jejunum in 8 CRSCS. The relation between invasion of tumor and lymph node metastasis was analyzed: mucosal involvement: 1 case/2case, muscle invasion; 0/2 full thickness; 4/6, adjacent structure 7/12. Postoperative complications were pneumonia, pleural effusion, hoarseness, mediastinitis, anastomosis site leakage, reoperation due to stenosis, chylothorax, empyema, mechanical ileus, wound infection, meat impaction at anastomosis site, and repair of gastrostomy site leakage. Adjuvant therapies were irradiation [15cases], chemotherapy [14cases], and Bougie dilatation [4 cases],

• Journal of Chest Surgery
• /
• 제20권3호
• /
• pp.588-592
• /
• 1987

A successful repair of traumatic descending thoracic aorta rupture was performed in a 27 year old man. The patient had automobile accident and transferred to our hospital. On admission, a chest film showed mediastinal widening and soon aortography was done. There was a fusiform aneurysm on the descending thoracic aorta just distal to the origin of the left subclavian artery measuring 5cm in diameter and 7cm in length. He underwent thoracotomy and the injured part of the aorta was replaced with a 24mm tightly Woven Dacron graft using femora-femoral bypass. The postoperative course was uneventful.

• Journal of Chest Surgery
• /
• 제34권2호
• /
• pp.176-179
• /
• 2001

이차성 대동맥장루는 아주 드물며 대동맥-장골동맥의 재건수술의 중대한 합병증으로 발생할 수 있다. 이 질환은 진성 대동맥장루와 paraprosthetic enteric fistula 로 분류할 수 있다. 이러한 합병증의 예방, 진단 및 치료는 추구해야할 문제로 되어 있다. 염증성 가성동맥류로 복부대동맥 및 장골동맥을 인조혈관으로 치환한 후 41개월에 내시경으로 Paraprosthetic enteric Fistula로 진단되어 수술을 시행한 39세 남자환자를 치험하였기에 보고한다.

• Journal of Chest Surgery
• /
• 제20권2호
• /
• pp.348-352
• /
• 1987

A 51 year-old male was admitted with the chief complaints of swallowing difficulty and pain on neck and upper chest for 2 months prior to admission: He was taken biopsy under esophagoscopy, and the result was squamous cell carcinoma. Preoperatively we studied the esophagogram and chest CT. On these, we found the main appreciable mass at midesophagus easily. But, we missed the upper cervical unexpected mass. So we performed the esophagectomy and lymph node dissection from upper clavicle level to the esophagogastric junction by thoracic approach as wide as possible, and cervical esophagostomy and feeding gastrostomy also. At that evening we reviewed the studied films in detail, and we found another mass lesion at C4-C6 level of cervical esophagus. We performed the 2nd operation e.g. cervical esophagectomy on next morning without hesitation. Between these two masses, there was almostly normally looking skip area grossly. The squamous cell carcinoma of the esophagus could be multicentric in character and may have skip area. But, we heard little reports until now. The two masses could be different in origin or be same probably by submucosal spreading. Anyway, it was an alarming case to the surgeon not to neglect the another possible lesions in squamous cell type. Postoperative course was uneventful, he took G-tube feeding with no problems on 7th postoperative day. Now he took the postoperative irradiation at out patient department.

• Journal of Chest Surgery
• /
• 제32권4호
• /
• pp.408-412
• /
• 1999

1956년 Liebow and Hubbell 의해 폐에 생긴 경화성 혈관종이 처음 보고된 이후 단독결절에 대해서는 여러 차례 발표된 예가 있었으나 다발성으로 경 \ulcorner\ulcorner혈관종이 생긴 예는 극히 드물다. 이 종양의 조직생성 원인은 아직 논란의 여지가 있으며 그 기원에 대한 여러가설이 있는 것으로 알려져 있다. 환자는 57세 여자 주부였으며 3개의 다른 결절이 발견되였고 하나는 우중엽에 또 다른 하나는 좌상엽의 폐첨후 분절에 나머지는 좌하엽의 상분엽에 위치하였다. 환자의 유일한 증상은 마른기침 이였다. 수술은 좌상엽의 폐첨후 분절 절제술 및 좌하엽의 상분절 쐐기 절제술의 방법으로 시행하였다. 수술후 경과는 큰 문제가 없었으며 환자는 술후 15일에 퇴원하였다.

• Journal of Chest Surgery
• /
• 제33권4호
• /
• pp.329-332
• /
• 2000

Synovial sarcoma is a malignant soft tissue tumor originated from the primitive mesencymal cell. It occurs primarily in the extremities, especially in the lower extremities. Primary pulmonary synovial sarcoma has been rarely reported in literatures. We experienced a case of intrapulmonary synovial sarcoma with brain metastasis which originated from the lung.