http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
개별검색 DB통합검색이 안되는 DB는 DB아이콘을 클릭하여 이용하실 수 있습니다.
통계정보 및 조사
예술 / 패션
<해외전자자료 이용권한 안내>
- 이용 대상 : RISS의 모든 해외전자자료는 교수, 강사, 대학(원)생, 연구원, 대학직원에 한하여(로그인 필수) 이용 가능
- 구독대학 소속 이용자: RISS 해외전자자료 통합검색 및 등록된 대학IP 대역 내에서 24시간 무료 이용
- 미구독대학 소속 이용자: RISS 해외전자자료 통합검색을 통한 오후 4시~익일 오전 9시 무료 이용
※ 단, EBSCO ASC/BSC(오후 5시~익일 오전 9시 무료 이용)
This report presents an analysis of 25 Korean patients with metastatic brain tumor seen at Seoul Natienal University Hospital from 1968 to 1977. In the same period there were 386 cases of brain tumors, so about 6.5% of total brain tumors was metastatic. The results are as following; 1) The sexes were represented, almost equally, with 12 males and. 13 females. In 21 cases (84%) the disease occurred between the ages of 31-60 years. 2) The most frequent site of primary malignancy was lung and the nexts were gastrointestinal tract, breast, liver and chorioepithelium in order. 3) About two-thirds of metastatic brain tumors were located in the middle cerebral artery supplying areas. 4) Average interval between the clinical onset of primary and secondary growths was short in liver and lung cancer, and long in breast and stomach cancer. 5) In cases which can be treated surgically chemotherapy and radiation seemed to improve the prognosis.
Surgical treatment of posterior circulation aneurysms are still challenging to the neurosurgeons, requiring highly skilled hands. During the past 10 years, the senior author(DH Han) operated upon 64 posterior circulation aneurysms. The number of the basilar bifurcation aneurysms(BBAA) were 31(48%), the posterior cerebral artery aneurysms(PCEAA) 7, the superior cerebellar artery aneurysms(SCAA) 10, the anterior inferior cerebellar aneurysms(AICAA) 3, the vertebro-basilar junction aneurysms(VBJA) 2, the vertebral artery aneurysms(VAA) 5 and the posterior inferior cerebellar artery aneurysms(PICAA) 6. The surgical approaches for BBAA, SCAA and PCEAA(proximal to P4) were pterional route in 41 aneurysms and subtemporal in 4. Modified pterional approach was suitable for most of such aneurysms. For lower basilar trunk aneurysms(AICAA and VBJA), both far lateral suboccipital craniectomy and petrosal presigmoid approach had been tried and the presigmoid one seemed to be the choice of approach. The author achieved aneurysmal neck clipping in the 48(75%) aneurysms, wrapping in other 8 and proximal clipping in the other 8. The operative mortality and morbidity were 6% and 17% each, which were comparable to the other series. Concerning surgical complications, transient oculomotor palsies were most frequent(38%), followed by transient hemiparesis, thalamic infarction, status epilepticus and peripheral infarction of the parent-arterial territory.
In this study, we reviewed the Pestalozzi's theory of Mathematics education. His aim of instruction is the development of human nature, by the harmonious cultivation of its powers and talents and promotion of manliness of life. In his educational theory, he emphasized on building up the Anschuuug by number, form and language which were named as an ABC of Anschuug. Therefore, Arithmetics, elements Geometry and Language were composed of the basic curriculum of Pestalzzi's school. We could appreciate the educational value of the Arithmentics and elements Geometry through Pestalozz's educational thought.
현재 국내 ITS는 현장장비 유지관리에 대한 연구 및 고장관련 DB가 부족하여 예비부품수 및 교체시기 산정에 대한 규정이 없는 실정이다. 이에 본 연구는 실제 고장이력자료를 갖고 신뢰성 분석을 실시하여 단거리전용통신(DSRC)방식 노변기지국(RSE)의 예비부품수 및 교체시기를 산정하였다. 전체 수집기간동안의 고장자료는 욕조곡선의 형상을 나타내어 우발고장기간의 자료로 신뢰성 분석을 실시하였으나 고장 수명 분포 중 적합되는 분포가 없었으며, 이러한 사실은 본 연구대상 노변기지국(RSE)의 경우 통계적 모형에 의한 예방 정비가 어려움을 의미한다. 따라서, 본 연구는 실증적인 방법으로 하자보수기간 년 동안의 수리비용 및 고장빈도 이력자료를 활용하여 노변기지국(RSE)의 교체여부를 결정하는 방법 및 필요 예비부품수를 산정하는 방법을 제안하였다. 향후에는 노변기지국(RSE) 외에 다른 ITS 장비에 대한 신뢰성 분석이 필요하다. There are not many studies on the maintenance and replacement for the ITS equipments. Most of ITS center has no comprehensive regulation on the equipment replacement. This study was focusing on estimation of equipment replacement period and the number of spare parts in stock using the actual failure data of Road Side Equipment (RSE) by Dedicated Short Range Communication (DSRC). The failure data showed a type of bath-tub curves. The data, however, did not fit to any probability distribution curve, which means that the preventive replacement cannot be strongly applied for the RSE. In the aspect of practical strategy, this study suggest that repairing cost and failure frequency be used for decision of replacement of RSE after the 1 or 2 year warrant period. The future study needs to include more RSE failure data as well as other equipments of the ITS.
Over a period of 11 years and 8 months, from January, 1957 to August, 1968, 29 patients with intracranial aneurysms and arteriovenous malformations had admitted in the neurosurgical department of Seoul National University Hospital. Of the 29 patients, 25 patients had intracranial aneurysms and 4 patients had arteriovenous malformations of the brain. In patients with aneurysms 14 were male and 11 were female. The age incidence was from 19 years to 62 years. The most frequent age was 30 to 50 in which 19 cases of 29 cases were present. With respect to aneurysms 15 cases of 25 occurred in the same age range. With respect to symptoms and signs, the most frequent symptom was headache and the most frequent sign was sitffness of the neck. Other symptoms and signs were contralateral motor weakness, pathological reflexes, and bruit in order. In arteriovenous malformations the incidence of convulsive seizure and intracerebral hematoma were more frequent than in aneurysms. A-11 cases were performed.angiographic study and proved as aneurysms or arteriovenous malformations. The hematoma was present 7%25 in aneurysms and 2/4 in AVM. The incidence of vasospasm were 12/29. In CSF study all cases showed bloody fluid except two unruptured cases. According to site the most frequent site was internal carotid-posterior communicating region. The frequent site in order middle crebral, posterior cerebral, anterior cerebral-anterior communicating region. The carotid-cavernous fistula was found in two cases. The arteriovenous malformations were present in cerebral hemisphere. The results of treatment were as follows: Mortality of conservative treatment was 37,0o, carotid ligation was 1750, cranitomy was 0% So total mortality was 00, 20%
Objective: To evaluate possible variability in chest radiologists’ interpretations of the Lung Imaging Reporting and Data System (Lung-RADS) on difficult-to-classify scenarios. Materials and Methods: Ten scenarios of difficult-to-classify imaginary lung nodules were prepared as an online survey that targeted Korean Society of Thoracic Radiology members. In each question, a description was provided of the size, consistency, and interval change (new or growing) of a lung nodule observed using annual repeat computed tomography, and the respondent was instructed to choose one answer from five choices: category 2, 3, 4A, or 4B, or “un-categorizable.” Consensus answers were established by members of the Korean Imaging Study Group for Lung Cancer. Results: Of the 420 answers from 42 respondents (excluding multiple submissions), 310 (73.8%) agreed with the consensus answers; eleven (26.2%) respondents agreed with the consensus answers to six or fewer questions. Assigning the imaginary nodules to categories higher than the consensus answer was more frequent (16.0%) than assigning them to lower categories (5.5%), and the agreement rate was below 50% for two scenarios. Conclusion: When given difficult-to-classify scenarios, chest radiologists showed large variability in their interpretations of the Lung-RADS categories, with high frequencies of disagreement in some specific scenarios.
Suprasellar meningiomas are uncommon intracranial tumors representing approximately 4-10% of intracranial meningiomas and the total excision is sometimes hazardous because of surrounding vital structures. We have experienced four cases of this lesion during last three years and the masses were approached through frontoparietal craniotomy and lateral subfrontal approach and were removed completely with microsurgical technique. Visual disturbances were improved in three cases and unchanged in one case. The literatures are also reviewed.