• 대한전기학회:학술대회논문집
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• 대한전기학회 2007년도 추계학술대회 논문집 전력기술부문
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• pp.220-222
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• 2007

자연재해 및 전력 시스템의 복잡성, 외부 노출 등으로 인해 전력 설비는 언제나 고장에 노출되어 있다. 전력회사는 전력의 안정성과 신뢰도 확보를 위해 끊임없이 노력하고 있지만 전력설비의 자그마한 이상에도 그 파급효과는 상당히 클 수 있다. 이에 선진 국가와 기업에서는 전력설비의 예방진단에 대한 많은 관심과 기술 개발이 이루어지고 있으며, 제품화되어 출시되고 있는 실정이다. (주)효성에서는 변압기 진단을 위한 센서 및 IED가 포함된 지능형 변압기(Intelligent Power Transformer)용 Local Unit을 개발하였다.

• 한국자동차공학회논문집
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• 제15권3호
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• pp.1-9
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• 2007

A major concern for Autonomous Military Robot in the rough terrain is the problem of moving robot from an initial configuration to goal configuration. In this paper, We generate a local path to looking for the best route to move an goal configuration while avoiding known obstacle from world model, not violating the mobility constraints of robot. Trough a Simulator for Unmanned Autonomous Vehicle, We can simulate a traversability of unmanned autonomous vehicle based on steering, acceleration, braking command obtained from local path planning.

• 의료ㆍ복지 건축 : 한국의료복지건축학회 논문집
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• 제30권1호
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• pp.27-36
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• 2024

Purpose: The role and facilities of public health centers responsible for local health are becoming increasingly important due to recurring infectious diseases such as COVID-19. With sudden outbreaks of infectious diseases, the infrastructure of public health center facilities like screening clinics are constructed varies depending on local conditions. resulting in discrepancies between intended usage and actual usage. Establishing guidelines for infectious disease response facilities that can be efficiently used within local communities is necessary. Methods: Field surveys are conducted at 6 public health centers to gather insights into the essential rooms, circulation patterns, and key considerations for space planning in screening clinics. Results: Ten design considerations emerge from the data, including spatial requirements, circulation guidelines, and considerations for accommodating diverse user needs and local conditions. Implications: Further research is needed to translate these guidelines into prototypes of temporary facilities.

• Archives of Plastic Surgery
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• 제39권4호
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• pp.376-383
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• 2012

Background No consensus has been reached regarding the outcome of management of local recurrence after transverse rectus abdominis myocutaneous (TRAM) flap breast reconstruction. This study demonstrated the presentation, management, and outcomes of local recurrence after immediate TRAM breast reconstruction. Methods A comparison was conducted among 1,000 consecutive patients who underwent immediate breast reconstruction with a pedicled TRAM flap (TRAM group) and 3,183 consecutive patients who underwent only modified radical mastectomy without reconstruction (MRM group) from January 2001 to December 2009. The presentation, treatment, and outcome including aesthetics and overall survival rate were analyzed. Results Local recurrences occurred in 18 (1.8%) patients (TRAM-LR group) who underwent TRAM breast reconstruction and 38 (1.2%) patients (MRM-LR group) who underwent MRM only (P=0.1712). Wide excision was indicated in almost all the local recurrence cases. Skin graft was required in 4 patients in the MRM-LR group, whereas only one patient required a skin graft to preserve the mound shape in the TRAM-LR group. The breast mound was maintained in all 17 patients that survived in the TRAM-LR group even after wide excision. The overall survival rate was 94.4% in the TRAM-LR group and 65.8% in the MRM-LR group (P=0.276). Conclusions Local recurrence after immediate TRAM flap breast reconstruction could be detected without delay and managed effectively by multiple modalities without reducing overall survival rates. Breast mound reconstruction with soft autologous tissue allowed for primary closure in most of the cases. In all of the patients who survived, the contour of their reconstructed breast remained.

• Radiation Oncology Journal
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• 제22권1호
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• pp.11-16
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• 2004

목적: 유방 관상피내암 환자들의 유방 보존술 및 방사선 치료 후 생존율과 국소 재발률, 재발 양상 및 국소 재발에 영향을 준 인자들을 분석하고, 적절한 치료법을 결정하고자 하였다. 대상 및 방법: 1995년 6월부터 2001년 12월까지 유방 관상피내암으로 유방 보존술 후 방사선 치료를 받았던 96명의 환자를 대상으로 후향적 분석을 시행하였다. 수술은 국소 절제 또는 광범위 절제가 시행되었고, 일부에서 액와 림프절 곽청술이 시행되었다. 방사선 치료는 전 유방에 50.4 Gy /28회를 조사하였고, 절단면에 종양이 있거나 절단면에서 종양이 가까웠던 경우($\leq$ 2 mm) 일부에서 종양이 있었던 부위에 $10\~14$ Gy를 추가 조사하였다. 전체 환자의 중앙 추적 관찰기간은 43개월($12\~102$개월)이었다. 결과: 5년 국소 무병생존율, 생존율은 각각 $91\%,\;100\%$였다. 국소 재발은 6명($6.3\%$)에서 발생하였고, 이 중 침윤성 유방암으로 재발한 환자는 1명이었다. 수술에서 재발까지의 기간은 1명을 제외하고는 모두 2년 이상이었다. 주위 림프절 재발이나 원격전이는 없었다. 재발한 환자 중 5명은 유방 전절제술 후 무병생존 중이고, 1명은 구제 치료예정이다. 국소 재발에 영향을 준 인자들에 대해 분석했을 때, 연령, 절단면 상태, comedo type, 핵분화도 모두 국소 재발에 영향을 주지 않는 것으로 나타났다. 수술 범위에 따라서도 국소 재발에 차이를 보이지 않았고(p=0.30), 절단면이 종양에서 가까웠던 경우 초기 종양 부위에 추가 조사도 국소 재발에 영향을 주지 않았다(p=1.0). 결론: 유방 관상피내암의 치료로 유방 보존술 및 방사선 치료 시행 후 높은 국소 제어율과 생존율을 얻을 수 있었다. 종양이 절단면을 침범하지 않는 한 절단면과 종양과의 거리와 추가 방사선 조사는 국소 재발에 영향을 주지 않는 것으로 나타났으나 향후 더 많은 환자로 장기적인 추적관찰이 필요할 것으로 생각된다.

• 대한기계학회논문집B
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• 제20권7호
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• pp.2337-2346
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• 1996

One of the most useful method for increasing combustion loading of premixed flame is to strengthen the turbulent intensity of unburned mixture. It produces an important information to a design of efficient combustion equipment that analysing microstructure of strong turbulence premixed flame. The flame structure and characteristics are depend on the turbulence of unburned mixture. Therefore, to strengthen the turbulent intensity of unburned mixture make flame scale small and accomplish efficient combustion. We measured the velocity of local flame front movements, local eddy radius and local reaction zone thickness quantitatively with increasing turbulent intensity of unburned mixture. We researched the microstructure of flame using ion currents that react sensitively in the reaction zone. Consequently, the velocity of local flame front movements is depend on the velocity of unburned mixture and local eddy scale is to be small with increasing turbulent intensity. But there is no change in local reaction zone thickness with turbulence.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2008년도 추계학술대회 논문집 전력기술부문
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• pp.336-338
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• 2008

송변전기기는 고압 대용량화로 진행되어, 기기의 고장 발생 시 그 파급효과는 엄청나다. 이에 전력설비들은 매우 높은 신뢰성이 요구되며 특히 기기의 고장을 예측 진단하여 신뢰성을 높이는 부분은 필수 불가결한 부분이 되었다. 이에 (주)효성에서는 변압기 진단을 위한 센서 및 IED가 포함된 지능형 변압기(Intelligent Power Transformer)용 Local Unit을 개발하였다. 본 논문은 (주)효성에서 개발한 Local Unit의 진단알고리즘에 대해 기술하였다.

• Radiation Oncology Journal
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• 제38권1호
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• pp.26-34
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• 2020

Purpose: Intensity-modulated radiotherapy (IMRT) allows for more precise treatment, reducing unwanted radiation to nearby structures. We investigated the safety and feasibility of IMRT for anaplastic ependymoma patients below 3 years of age. Materials and Methods: A total of 9 anaplastic ependymoma patients below 3 years of age, who received IMRT between October 2011 and December 2017 were retrospectively reviewed. The median equivalent dose in 2 Gy fractions was 52.0 Gy (range, 48.0 to 60.0 Gy). Treatment outcomes and neurologic morbidities were reviewed in detail. Results: The median patient age was 20.9 months (range, 12.1 to 31.2 months). All patients underwent surgery. The rates of 5-year overall survival, freedom from local recurrence, and progression-free survival were 40.6%, 53.3%, and 26.7%, respectively. Of the 9 patients, 5 experienced recurrences (3 had local recurrence, 1 had both local recurrence and cerebrospinal fluid [CSF] seeding, and 1 had CSF seeding alone). Five patients died because of disease progression. Assessment of neurologic morbidity revealed motor dysfunction in 3 patients, all of whom presented with hydrocephalus at initial diagnosis because of the location of the tumor and already had neurologic deficits before radiotherapy (RT). Conclusion: Neurologic morbidity is not caused by RT alone but may result from mass effects of the tumor and surgical sequelae. Administration of IMRT to anaplastic ependymoma patients below 3 years of age yielded encouraging local control and tolerable morbidities. High-precision modern RT such as IMRT can be considered for very young patients with anaplastic ependymoma.

• 한국수학교육학회지시리즈B:순수및응용수학
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• 제13권4호
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• pp.261-267
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• 2006

A local convergence analysis of Newton's method for perturbed generalized equations is provided in a Banach space setting. Using center Lipschitzian conditions which are actually needed instead of Lipschitzian hypotheses on the $Fr\'{e}chet$-derivative of the operator involved and more precise estimates under less computational cost we provide a finer convergence analysis of Newton's method than before [5]-[7].

• 한국실내디자인학회논문집
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• 제19권3호
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• pp.224-233
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• 2010

As urban function has become diversified and complicated, multifunctional complex facilities to satisfy new functional desires are necessary. Since local autonomy started, many facilities previously run and managed by central administrative agencies are now under management of localities, and functionally, the necessity for governments complexes town to satisfy diverse taste of populace such as creating local community becomes imminent. Analyzing characteristics by space composition factor of the public health center, newly built as part of such governments complexes town and understanding required area of each part, this project is to be used as basic material for construction plan of public health center that is equipped with local characters while devising construction of the public health center in the governments complexes town. Research method is to analyze four public health center facilities located in governments complexes town sites built after 2007, among twenty five public health centers in Seoul, by spatial functions. Also, based on statistical documents of usage of public health center facilities, research over spatial compositional factors and area composition has been conducted. As a result, connectivity between local government building located inside the governments complexes town and public health center and that of spatial composition factor by part, area ratio by part and floor type of public health center are comprehended. Connectivity type of public health centers are divided into horizontal and vertical connectivity and it is found that spatial composition of public health center is compartmentalized into low level, mid level and high level, to make access by users easier. Level type is decided as radial, rotational and combined by hallway connecting facilities.