• Journal of Gastric Cancer
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• v.8 no.3
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• pp.154-159
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• 2008

Purpose: Although most surgeons generally administer prophylactic antibiotics for more than three days, the optimal duration of antimicrobial prophylaxis in elective gastric surgery is still open to debate. The aim of this study was to determine if the duration of prophylactic antibiotic use can affect the recovery of patients after elective gastric surgery. Materials and Methods: A total of 93 patients with gastric cancer were enrolled in this study, between January 2007 and December 2007. Patients were excluded if they had an infection at the time of surgery or they underwent an emergency operation. The first antibiotics were commonly given from just prior to the operation. The patients were divided into three groups according to the operation periods: those who received antibiotics only on the day of operation (arm A), those who received antibiotics for up to 3 days (arm B), and those who received antibiotics for more than 5 days postoperatively (arm C). The antibiotic that was used was second generation cephalosporin. Results: The rate of surgical site infection was 12.9% (n=4) in arm A, 16.1% (n=5) in arm B and 19.4% (n=6) in arm C, respectively (P=0.788). No relationship was observed between the duration of prophylaxis and the rate of fever or the neutrophil counts during postoperative 7 days (P=0.119, P=0.855). Conclusion: The prophylactic effect of antibiotics on recovery, with the antibiotics being received only on the day of the operation, is as effective as receiving antibiotics for a longer duration after gastric cancer surgery.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2007.11a
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• pp.355-356
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• 2007

• Archives of Plastic Surgery
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• v.42 no.4
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• pp.492-494
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• 2015

• Proceedings of the Optical Society of Korea Conference
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• 1990.02a
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• pp.264-268
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• 1990

A guided-wave electro-optic Mach-Zehnder interferometric modulator was fabricated on X-cut LiNbO3 . The channel waveguides were formed by proton diffusion with self-aligned SiO2-cladding. A mach-Zehnder interferometric modulator with arm lengths of 7mm has been fabricated and tested at 0.6328${\mu}{\textrm}{m}$. Its modulation depth with V$\pi$ of only 3.5V was 85% and the 3dB bandwidth was 1.6KHz. For high speed operation, the electrode dimension should be reduced to have smaller R, L, and C.

• Journal of Korean Neurosurgical Society
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• v.53 no.2
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• pp.129-131
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• 2013

The incidence of spinal meningioma is very rare in children. A 14-year-old girl presented with right arm weakness, gait disturbance, and urinary incontinence. Cervical magnetic resonance imaging revealed an intradural extramedullary tumor dorsal to the spinal cord in the level of C1. The tumor was totally removed despite the severe cord compression. Meningotheliomatous meningioma was diagnosed after histological examination.

• Proceedings of the Korean Information Science Society Conference
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• 2004.04a
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• pp.919-921
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• 2004

최근 임베디드 시스템 설계에서 저전력 소모와 SoC가 주된 관심사가 되면서, ARM 프로세서와 AMBA 버스가 각광을 받고 있다. AMBA 버스가 고속 모듈에 대해서는 장점을 지니지만. 저속 모듈과의 인터페이스에는 많은 제약이 따른다. 따라서 속도가 서로 다른 이종 모듈간에 속도 보상을 위한 bridge 가 필요하다. 이러한 용도로 APB bridge가 표준으로 자리 매김하고 있지만, 속도가 고정되어 있기 때문에 융통성이 배제된다. 본 논문에서는 이러한 단정을 보완하기 위해, 구조가 간단하고 구현이 쉬운 ISA 방식의 bridge를 제안하여, 많은 주변장치들을 손쉽게 AHB Slave로 인터페이스 할 수 있게 만든다.

• 제어로봇시스템학회:학술대회논문집
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• 2001.10a
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• pp.45.4-45
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• 2001

In this paper, we present the wet-based monitoring system for industrial controller such as inverter controller for hydraulic elevators. The monitoring system is using an embedded web server on embedded Linux platform. The control board of system-On-Chip (SoC) is based on ARM7TDMI with Ethernet controller. Wet-based monitoring system using embedded Linux platform can reduce the cost, and have flexibility both of technical issues and locations If the system to be monitored. The system shows the feasibility of remote monitoring system based on embedded Linux platform.

• Proceedings of the Korean Information Science Society Conference
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• 2001.10c
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• pp.439-441
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• 2001

본 논문에서는 ARM7TDMI CPU를 기반으로 한 네트워크 장비에 구현된 DHCP의 설계 및 구현에 대하여 논한다. 실시간 운영 체제인 uC/OS와 Watt TCP/IF 등의 소프트웨어가 탑재되어 있는 시스템에 DHCP를 구현 함으로써, 네트워크 설정이 편리한 시스템이 되도록 하였다. 제안할 'tiny-DHCF' 는 본래의 기능은 수행하면서, 그 크기를 축소한 것이다. 임베디드 시스템에서 더 경제적으로 구현할 수 있는 소형 UHCP인 'tiny UHCP' 적용 방법에 관하여 논의하고자 한다.

• Proceedings of the IEEK Conference
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• 2006.06a
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• pp.747-748
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• 2006

In this paper, we describe photonic sensor interface and driver program based on SOPC(System on a programmable chip) platform. This platform uses device that has ARM922T processor and APEX FPGA area on a chip. As for driver program development, three different methods are tried such as simple firmware, real-time OS based program and embedded Linux based program, and results are compared for SoC implementation.

• Proceedings of the Korean Information Science Society Conference
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• 2004.10a
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• pp.553-555
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• 2004

SoC 분야에서 온 칩 버스는 전체 시스템의 성능을 결정하는 중요한 요소이다. 이에 따라 최근 ARM 사에서는 고성능 온 칩 버스 구조인 ML(Multi-Layer) AHB 버스를 제안하였다. ML AHB 버스는 저전력 임베디드 시스템에 적합한 버스 구조로써 현재 널리 사용되고 있다. 하지만, 고가이기 때문에 ADK(AMBA$^{TM}$ Design kit) 구매에 대한 부담이 적지 않다. 본 논문은 ML AHB의 버스 구조인 버스 매트릭스 구현 및 ADK에서 제공되지 않는 테스트 환경 즉, Protocol Checker 및 Performance Monitor Module 구현에 관한 것이다.