말쥐치의 생화학적 특성에 관한 연구 : 1 . 일반성분의 연간 변화 1 . Changes of General Components for One Year

강성구,김우준 한국수산학회 1981 한국수산과학회지 Vol.14 No.1

말쥐치의 年間 探肉率과 化學成分을 測定 分析한 結果는 다음과 같다. 1. 採肉率은 3∼6月에 낮고, 7∼12月에 높다. 2. 水分은 3∼6月에 81.4∼82.0%로 높고, 7∼12月에 77.5∼80.1%로 낮다. 1∼2月에는 79.4∼81.4% 였다. 3. 蛋白質은 3∼6月에 含有量이 15.4∼15.7%로 낮고 7∼12月에 71.0∼19.9%로 높다. 1∼2月에는 16.1∼17.0%였다. 4. 脂質의 含有量은 3∼6月에 0.31∼0.41%로 낮고, 7∼1月에는 0.46∼0.48%로 높다. 2月에는 0.43%였다. 5. 炭水化物의 含有量은 3∼7月에 0.3∼0.4%로 낮고 8∼1月에 0.5∼0.7%로 높다. 2月에는 0.3%였다. 探肉率과 化學成分 測定結果는 7∼12月에 採肉率이 높고 蛋白質의 含有量도 많다. The ratio of the eatable flesh taken from the filefish and its chemical components were investigated from March 1980 to February 1981 and the results are as follows: 1. The ratio of the eatable flesh taken from the fish was low during March to June and high during July to December. 2. The moisture content was 81.4-82.0% during March to June, 77.5-80.1% during July to December and 79.4-81.4% duriug January to February. 3. The protein content was 15.4-15.7% during March to June, 17.0-19.9% during July to December and 16.1-17.0% during January to February. 4. The Lipid content was 0.31-0.41% during March to January, 0.46-0.84% during July to January and 0.43% during February. 5. The carbohydrate content was 0.3-0.4% during March to July, 0.5-0.7% during August to January and 0.3% during February. In conclusion, the ratios of the eatable flesh taken from the filefish and its protein content were highest durng July to December in one year.

청소년 특기ㆍ적성교육 활동과 만족도의 관계

강성구,최재원 한국사회체육학회 2002 한국사회체육학회지 Vol.18 No.2

The Relations between the Satisfaction of Participationin Extra-Class Activities of Teenagers

Two Different Renal Cell Carcinomas and Multiple Angiomyolipomas in a Patient with Tuberous Sclerosis

강성구,고영휘,강석호,김진,김철환,박홍석,문두건,이정구,김제종,천준 대한비뇨의학회 2010 Investigative and Clinical Urology Vol.51 No.10

We report a case of tuberous sclerosis associated with two histologically different renal cell carcinomas (RCCs) and multiple angiomyolipomas (AMLs) in the same kidney. A 43-year-old female was admitted to our hospital with left flank pain and a huge palpable mass in the left flank area. Abdominal computed tomography revealed two concurrent RCCs and multiple AMLs in the left kidney. Because of the clinical suspicion of RCC, the patient underwent left radical nephrectomy. On gross examination, the total size of the resected left kidney was 30.5x17x8 cm. Microscopically, the upper pole tumor features were consistent with chromophobe RCC and the midpole tumor was a clear-cell RCC. The multifocal masses in the remaining remnant parenchyma were AMLs. Six months after surgery, the patient is healthy without signs of tumor recurrence.

Robot-Assisted Laparoscopic Distal Ureterectomy and Ureteral Reimplantation

강성구,최훈,고영휘,태범식,조석,안홍재,채지윤,강석호,천준 대한비뇨의학회 2009 Investigative and Clinical Urology Vol.50 No.9

We report here on our technique and outcomes of the first case of robot-assisted laparoscopic distal ureterectomy with a bladder cuff excision and ureteroneocystostomy. A 74-year-old male patient who had a distal ureter tumor underwent robot-assisted transperitoneal distal ureterectomy. After distal ureterectomy with bladder cuff excision was performed, direct ureteroneocystostomy was performed. The whole procedure was successfully performed by using the robot without conversion to open surgery. The total operative time was 207 minutes, and the estimated blood loss was 30 ml. The final pathological examination showed stage T2 invasive transitional cell carcinoma of the distal ureter. The patient's postoperative recovery was uneventful and the bladder cuff was free of tumor. Robot-assisted laparoscopic distal ureterectomy with ureteroneocystostomy is safe and feasible and offers patients the advantages of minimally invasive surgery.

Aspect ratio control of Au nanorods via temperature and hydroxylamine concentration of reaction medium

강성구,김영훈,한미선,최인희,이정진,이종협 한국물리학회 2006 Current Applied Physics Vol.6 No.1l

Gold nanorods were prepared by the seed-mediated method described by Jana et al. Eects of reaction temperature and hydroxyl-amine concentration on the aspect ratio and yield of the gold nanorods were investigated by UVVisNIR spectroscopy and transmis-that the addition of hydroxylamine drastically improved the yield. In addition, Au/Pt hybrid nanodumbbells were synthesized by con-trolling the growth conditions. The growth mechanism of the gold nanorods is discussed with respect to the reaction temperature andhydroxylamine concentration of reaction medium.

Investigation on shape variation of Au nanocrystals

강성구,최인희,이정진,이종협,김영훈 한국물리학회 2008 Current Applied Physics Vol.8 No.6

A variety of shapes, such as rod, tripod, /φ-shape and cube, of Au nanocrystals were synthesized by employing different reaction conditions. The nanocrystals and their shape variation were characterized by transmission electron microscopy and UV–vis spectrophotometry. The evolution of shape was accomplished by controlling the parameters used in their synthesis, the concentration of reducing agent and surface capping agent. The effect of synthetic parameters on shape was explored, to determine suitable conditions for producing each shape of nanocrystals. Nanocrystals with different shapes have different plasmon bands in the visible region of the spectrum, which is a valuable property for sensor applications. A variety of shapes, such as rod, tripod, /φ-shape and cube, of Au nanocrystals were synthesized by employing different reaction conditions. The nanocrystals and their shape variation were characterized by transmission electron microscopy and UV–vis spectrophotometry. The evolution of shape was accomplished by controlling the parameters used in their synthesis, the concentration of reducing agent and surface capping agent. The effect of synthetic parameters on shape was explored, to determine suitable conditions for producing each shape of nanocrystals. Nanocrystals with different shapes have different plasmon bands in the visible region of the spectrum, which is a valuable property for sensor applications.

실시간 운영체제의 우선순위 역전현상 해결을 위한 프로토콜 설계 및 구현

강성구,경계현,고광선,엄영익 한국정보처리학회 2006 정보처리학회논문지. 컴퓨터 및 통신시스템 Vol.13 No.5

Real-time operating systems have been used in various computing environments, where a job must be completed in its deadline, with various conditions, such as effective scheduling policies, the minimum of an interrupt delay, and the solutions of priority inversion problems, that should be perfectly satisfied to design and develop optimal real-time operating systems. Up to now, in order to solve priority inversion problems among several those conditions. There have been two representative protocols: basic priority inheritance protocol and priority ceiling emulation protocol. However, these protocols cannot solve complicated priority inversion problems. In this paper, we design a protocol, called recursive priority inheritance (RPI), protocol that effectively solves the complicated priority inversion problems. Our proposed protocol is also implemented in the Linux kernel and is compared with other existing protocols in the aspect of qualitative analysis. 실시간 운영체제는 정해진 시간 내에 작업처리를 완료해야 하는 분야에 주로 사용되고 있으며, 최적의 실시간 운영체제를 설계하고 개발하기 위해서는 효과적인 스케줄링 정책, 인터럽트 지연 최소화, 우선순위 역전현상 해결 등의 조건을 만족시켜야한다. 이러한 조건들 중에서 우선순위 역전현상을 해결하기 위해 지금까지 basic priority inheritance 프로토콜, priority ceiling emulation 프로토콜 등이 제안되었으나, 하나의 프로세스가 동시에 다수의 자원을 소유하는 경우 또는 재귀적으로 자원을 소유하거나 요청하는 경우와 같이 대표적인 두 가지 복잡한 우선순위 역전현상에 대해서는 해결이 불가능하다. 이에 본 논문에서는 재귀적 자료구조를 기반으로 다양한 우선순위 역전현상을 효과적으로 해결할 수 있는 RPI(Recursive Priority Inheritance) 프로토콜을 설계하고, 이를 리눅스 커널에 구현하여 검증한 내용을 보인다.

전기자동차 충전 인프라에서의 보안위협 및 보안요구사항 분석

강성구,서정택 한국정보보호학회 2012 정보보호학회논문지 Vol.22 No.5

With response to the critical issue of global warming, Smart Grid system has been extensively investigated as next efficient power grid system. Domestically, Korean is trying to expand the usage of Electric Vehicles (EVs) and the charging infrastructure in order to replace the current transportation using fossil fuels holding 20% of overall CO2 emission. The EVs charging infrastructures are combined with IT technologies to build intelligent environments but have considerable number of cyber security issues because of its inherent nature of the technologies. This work not only provides logical architecture of EV charging infrastructures with security threats based on them but also analyses security requirements against security threats in order to overcome the adversarial activities to Smart Grid. 지구 온난화에 대한 대응 노력으로 스마트그리드가 주목받고 있으며, 국내의 경우 정부는 CO2 배출량의 20%를차지하고 있는 수송 분야를 대체하기 위한 노력으로 전기자동차 및 충전 인프라 구축을 확대하고 있다. 하지만 전기자동차 충전 인프라는 지능화를 위해 IT기술을 접목하고 있어 기존 IT기술이 가지고 있던 보안위협들을 그대로 상속받을 수 있다. 이로 인해 발생할 수 있는 보안 사고를 미연에 방지할 수 있도록 보다 안전한 전기자동차 충전 인프라 구축이 요구된다. 이에 본 논문은 전기자동차 충전 인프라에 대한 논리적 아키텍처를 제시하고 이를 바탕으로 발생 가능한 보안위협들을 식별하였다. 또한, 이러한 보안위협들을 대응하기 위한 보안요구사항을 분석 및 제시하였다.

Design of a Passive Brake Mechanism for Tendon Driven Devices

강성구,조규진,인현기 한국정밀공학회 2012 International Journal of Precision Engineering and Vol.13 No.8

Tendon driven mechanism is one of the most popular mechanism for transmitting force and power from a distance. The energy efficiency of a tendon driven system can be improved if it can maintain actuation force while it is not moving without mechanical work. This could be achieved by a brake; a brake without an additional actuator is preferred for the compactness of the whole system. We present a novel passive brake mechanism, a capstan brake, which consists of a capstan and two one-way clutches. The friction between the capstan and the cable amplifies a small resisting force (originated from an inactive motor) to gain enough brake force. Because no additional actuator is involved, generation of the brake force does not consume energy. Also, the one-way clutches enable the capstan to rotate in the winding direction. Therefore, the brake force is exerted only when it is needed, and the performance of the whole device does not decrease owing to the use of the capstan brake. The performance of the proposed brake mechanism has been evaluated through several tests. The results show that the amount of the maximum brake force for the test condition is more than 55 N (and can be further increased by increasing the number of windings), and that the force loss from the brake is negligible.

더 좋은 방송을 위하여

姜成求 관훈클럽 1993 관훈저널 Vol.- No.56