충돌 위험 모델을 활용한 UAM 평행 항로 충돌 위험 분석

김연실,배중원 한국항행학회 2023 韓國航行學會論文誌 Vol.27 No.5

In this study, the collision risk of the UAM (Urban Air Mobility) corridor was analyzed using a collision risk model applied to the manned aircraft corridor. According to the K-UAM roadmap and operating concept, UAM is expected to fly on a designated route similar to existing manned aircraft operations and operate on two routes, traveling back and forth between the departure point and the destination point. Among domestic manned aircraft routes, the manned aircraft operation between Gimpo Airport and Jeju Airport is similar to this and takes the form of a parallel route with a lateral separation distance between the two routes. In this study, we analyzed the collision risk of the UAM corridor according to the lateral separation distance using a collision risk model used to analyze the collision risk of manned aircraft parallel routes for a similar type of UAM corridor. Based on this, we finally analyzed how many parallel routes could be installed within the width of the Han River, considering the K-UAM demonstration route.

이달의 수필 : 살림살이

김연실 대한지방행정공제회 1969 地方行政 Vol.18 No.188

두 번 울어버린 날

김연실 샘터사 1994 월간 샘터 Vol.25 No.12

Reirradiation of head and neck cancer in the era of intensity-modulated radiotherapy: patient selection, practical aspects, and current evidence

김연실 대한방사선종양학회 2017 Radiation Oncology Journal Vol.35 No.1

Locoregional failure is the most frequent pattern of failure in locally advanced head and neck cancer patients and it leads to death in most of the patients. Second primary tumors occurring in the other head and neck region reach up to almost 40% of long-term survivors. Recommended and preferred retreatment option in operable patients is salvage surgical resection, reporting a 5-year overall survival of up to 40%. However, because of tumor location, extent, and underlying comorbidities, salvage surgery is often limited and compromised by incomplete resection. Reirradiation with or without combined chemotherapy is an appropriate option for unresectable recurrence. Reirradiation is carefully considered with a case-by-case basis. Reirradiation protocol enrollment is highly encouraged prior to committing patient to an aggressive therapy. Radiation doses greater than 60 Gy are usually recommended for successful salvage. Despite recent technical improvement in intensity-modulated radiotherapy (IMRT), the use of concurrent chemotherapy, and the emergence of molecularly targeted agents, careful patient selection remain as the most paramount factor in reirradiation. Tumors that recur or persist despite aggressive prior chemoradiation therapy imply the presence of chemoradio-resistant clonogens. Treatment protocols that combine novel targeted radiosensitizing agents with conformal high precision radiation are required to overcome the resistance while minimizing toxicity. Recent large number of data showed that IMRT may provide better locoregional control with acceptable acute or chronic morbidities. However, are required before a definitive conclusion can be drawn on safety and effectiveness of IMRT.

Evaluation of skin surface dose for head and neck cancer patients treated with intensity-modulated radiation therapy using in vivo dosimetry

김연실,이동수,강영남,유미나,홍주영,윤세철,장홍석 대한방사선방어학회 2011 대한방사선방어학회 학술발표회 논문요약집 Vol.2011 No.04

특집/사이버나이프 로봇형 방사선수술장치를 이용한 암 치료

김연실 대한의사협회 2008 대한의사협회지 Vol.51 No.7

The Cyberknife is an integrated image-guided, frameless radiosurgery system. The physical component includes a compact 6 MV X-band linear accelerator mounted to the mobile arm of a robotic manipulator and a real- time imaging system connected to a remote image registration console. Two orthogonally positioned diagnostic x-ray cameras provide real time images of the patient’s internal anatomy during treatment. The images are processed automatically to identify radiographic features, such as skull bone landmarks or implanted fiducials and are then automatically compared with digitally reconstructed image of the patient’s planning CT. In this processing, the direction of the radiation beam is continuously re-adjusted to reflect any changes in the patient position. An analysis of the accuracy of the Cyberknife radiosurgery system found that the machine has a clinically relevant accuracy of 1.0 ± 0.3mm. While clinical results with intracranial lesions are comparable to frame-based radiosurgical technique using gamma-knife or linac, recent experiences demonstrate the potential to broadly expand the scope of radiosurgery to many extracranial sites especially for cancer patients. The major potential benefit of radiosurgical ablation of malignant tumors are relatively short treatment time in an out-patients setting combined with better local control of the tumor with minimal risk of side effects. Cyberknife radiosurgery offers a new and alternative therapeutic modality for the medically inoperable early cancers, previous irradiated sites, and difficult lesions not amenable to open surgery, as a boost therapy with surgery or external radiation therapy or for rapid symptom relief of palliative care patients. While we are encouraged by excellent local control of early clinical experiences of Cyberknife, we also stressed the importance of long term follow-up results.

차량 환경에서 RTK 위치 결정을 위한 저가 관성센서 기반 GPS 반송파 불연속 측정치 검출

김연실,송준솔,박병운,기창돈 한국항공우주학회 2014 한국항공우주학회 학술발표회 논문집 Vol.2014 No.4

사이클 슬립은 RTK(Real-time Kinematics)와 같은 GPS 반송파 기반 위치 결정 알고리즘에 있어서 매우 중요한 이슈 중 하나이다. 약한 신호에서 매우 빈번히 발생하며 위치 결정 정확도를 현저히 저하시키기 때문이다. 사이클 슬립을 검출하기 위하여 많은 연구가 진행되어 왔으며 INS(Inertial Navigation System)를 이용한 방법 또한 연구되어 왔다. 본 논문은 차량환경에서 RTK 위치 결정을 위하여 저가 관성센서를 이용하여 사이클 슬립을 검출하는 알고리즘을 제시한다. GPS 수신기에서 수신된 반송파 신호와 INS 로부터 추정한 반송파 신호를 비교하여 잔여오차를 모니터링 값으로 정의하여 검사함으로써 사이클 슬립 발생 여부를 판단한다. 저가의 시스템을 구성하기 위해 MEMS 급의 관성센서를 사용하였으며 고 해상도의 사이클 슬립 검출 성능을 위해 짧은 시간 동안 정확한 상대위치 추정이 가능한 INS 의 장점을 고려한 모니터링 값을 정의하고 결과를 분석하였다. 실 차량을 이용한 실험을 통해 제시한 알고리즘의 성능을 평가하였다. Cycle-slip detection is one of the most important issue to implement a GPS carrier phase positioning system to a vehicle, because cycle-slip is very frequent to the weak carrier signal. It results in a degradation of the vehicle’s position accuracy with a wrong ambiguity resolution. Cycle slip detection algorithms have been studied and developed for several decades. To detect the cycle-slip INS (Inertial Navigation System) occasionally suggested to be integrated with GPS. This paper represents the GPS cycle slip detection algorithm by using Low-cost MEMS IMU for RTK positioning of land vehicle. The cycle slip is detected by comparing carrier phase measurement from GPS satellite with estimated range from integration navigation solution. The residual between the estimated and measured range is defined as a monitoring value. To achieve the cost-effectiveness, we use MEMS grade IMU. And to achieve the high resolution cycle slip detection performance, we define the monitoring value by considering the advantage of INS which has accurate relative positioning performance in short time duration. By conducting the land vehicle experiment, we verify the performance of proposed algorithm.

纖維工業 女從業員의 活動空間(action space)에 關한 硏究

金姸實,장혜정 효성여자대학교 사범대학 학도호국단 1983 師大論壇 Vol.2 No.-

Elective Neck Node Irradiation of Cervical Lymphnode in Head and Neck Cancer

김연실 가톨릭대학교 가톨릭암센터 2007 암심포지움 Vol.- No.1

비성장 교회를 통한 문제점 진단과 방향성 제기

김연실 선문대학교 신학대학 1999 선문대학교 신학대학논문집 Vol.1999 No.-

성장하고 있는 교회는 건강한 교회이다. 살아 숨쉬는 교회이다. 그러나 이것을 반대로 생각하면 성장하지 못하는 교회는 곧 건강하지 못한 교회가 된다. 정체되어 있으며 죽은 교회라 할 수 있다. 상처가 난 부위를 누군가가 건드린다면 심한 통증을 느끼게 될 것이다. 그러나 그 상처를 그냥 내버려 두어서 스스로 아물게 할 것이 아니라, 지금의 작은 상처로 인해 도리어 더 큰 아픔을 겪어야 된다면, 그 상처를 건드려 지금 당장은 심한 통증을 느낄지라도 치료를 시도하여야 할 것이다. In order to develop the multi-heat pump system for two zones with different capacity, the optimum refrigerant control circuit using capillary tubes was designed. The system characteristics of multi-heat pump was investigated from the rating test and the reliability test, by using the multi-calorimeter with a high performance. The results of the rating test showed that the capacity of the multi-heat pump system satisfied about 93% of the design value. In particular, the capacity of cooling single mode increased about 13% and the capacity of heating multi mode increased about 5%, compared to the design value. And the rating refrigerant, the compressor capacity and the accumulator capacity for the multi-heat pump were obtained.