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대용량무선전송장비 전처리장치의 시험 소요시간 단축을 위한 자동 측정 프로그램 연구
신석호,조태종,Shin, Suk-Ho,Cho, Tae-Chong 한국인터넷방송통신학회 2020 한국인터넷방송통신학회 논문지 Vol.20 No.5
전술정보통신체계(TICN)의 핵심체계인 대용량무선전송장비(HCTRS)용 전처리장치는 송신신호를 증폭시키는 역할을 한다. 전처리장치 성능 시험 중 상호 혼변조와 고조파 시험은 계측기 설정 및 측정을 수동으로 확인하여 시험시간이 오래 걸린다. 따라서 본 논문에서는 각 시험에 필요한 계측기 설정 및 측정을 자동화하는 프로그램을 개발하여 시험 방법을 개선하였다. 본 제안 방법은 상호 혼변조와 고조파 시험을 동시에 진행할 수 있었다. 개선한 시험 방법은 기존 시험 방법과 비교하여 소요시간이 단축됨을 확인하였다. 또한 작업자 숙련도에 따라 시험시간이 결정됐던 기존 시험 방법과는 달리 독립적으로 소요시간을 관리할 수 있어 효율적인 품질보증이 가능할 것으로 기대된다. FEU which is a important device in HCTRS of TICN amplifies transmission signals. Tests of intermodulation distortion and harmonic distortion for FEU have been performed manually, and take a lot of time. This paper improves the test methods using program that set up the measurement instruments and read the data automatically. This proposal allows intermodulation distortion and harmonic distortion test simultaneously. And the new test methods show that the measurement time is shorter than before. Also, it is expected that efficient quality assurance is possible because the test time can be independently managed, unlike the previous methods, where the test time was determined according to the skill level of the operator.
신석호(Suk-Ho Shin) 대한소아청소년정신의학회 2017 소아청소년정신의학 Vol.28 No.4
Social (pragmatic) communication disorder (SCD) is a new diagnosis included under communication disorders in the neurodevelopmental disorders section of Diagnostic and Statistical Manual of Mental Disorders-5. SCD is defined as a primary deficit in the social use of nonverbal and verbal communication. SCD has very much in common with pragmatic language impairment, which is characterized by difficulties in understanding and using language in context and following the social rules of language, despite relative strengths in word knowledge and grammar. SCD and Autism Spectrum Disorder (ASD) are similar in that they both involve deficits in social communication skills, however individuals with SCD do not demonstrate restricted interests, repetitive behaviors, insistence on sameness, or sensory abnormalities. It is essential to rule out a diagnosis of ASD by verifying the lack of these additional symptoms, current or past. The criteria for SCD are qualitatively different from those of ASD and are not equivalent to those of mild ASD. It is clinically important that SCD should be differentiated from high-functioning ASD (such as Asperger syndrome) and nonverbal learning disabilities. The ultimate goals are the refinement of the conceptualization, development and validation of assessment tools and interventions, and obtaining a comprehensive understanding of the shared and unique etiologic factors for SCD in relation to those of other neurodevelopmental disorders.
Ka 밴드에서 Power Meter 계측 명령어에 따른 측정 정확도와 소요시간에 대한 연구
조태종,신석호,Cho, Tae-Chong,Shin, Suk-Ho 한국인터넷방송통신학회 2020 한국인터넷방송통신학회 논문지 Vol.20 No.5
측정 명령어에 따른 정확도와 소요시간은 효율적인 Ka 밴드용 자동 시험 장비(ATE)를 구축하는데 중요한 요소이다. 이에 따라 본 논문에서는 RF 대표 계측기 Power Meter의 측정 명령어에 대해 연구하였다. 30 G ~ 31 GHz에서 Power Meter의 측정 명령어 FETCH와 MEASURE의 각 측정 레벨에 따른 정확도와 소요시간을 비교하였으며, -70 ~ +20 dBm 영역을 2가지 Power Sensor로 측정하였다. 측정 결과 신속하게 데이터를 불러오는 FETCH 명령어는 잡음 레벨보다 높은 선형 구간에서 비교적 정확한 데이터를 얻을 수 있었다. 가장 정확한 데이터를 얻을 수 있는 MEASURE 명령어는 FETCH 대비 시간이 많이 소요 되었으며, 최대 13.2초가 소요 되었다. 이를 통해 30 G ~ 31 GHz에서 Power Meter 측정 명령어의 정확도와 측정 소요시간을 확인할 수 있었고, 해당 연구 결과는 효율적인 Ka 밴드용 ATE를 구축하는데 기준을 제시할 수 있을 것으로 기대된다. Measurement accuracy and required time is important to make ATE(Automatic test equipment) system in Ka band, and SCPI commands of power meter which is a representative RF test equipment are studied in this paper. Comparison data between FETCH and MEASURE which are SCPI commands are measured in 30 G ~ 31 GHz and -70 ~ +20 dBm using two power sensor. The data show that FETCH which is the fastest SCPI is able to get reliable data in linear interval above noise level. MEASURE which is the best accurate command takes longer time than FETCH, and the longest time is 13.2 seconds. These results offer that measurement accuracy and required time of the two SCPI for power meter and would be used as a guideline for efficient ATE system in Ka band.
전관선 ( Kwan Sun Chun ),신석호 ( Suk Ho Shin ),김수현 ( Su Hyun Kim ),고재기 ( Jae Ki Koh ),김인영 ( In Yung Kim ),황환식 ( Hwan Sik Hwang ),박훈기 ( Hoon Ki Park ) 대한내과학회 2007 대한내과학회지 Vol.73 No.4
Background: Atherosclerotic cardiovascular disease and metabolic syndrome are both rapidly increasing in Koreans due to the new westernized eating habits and the aging of the population. The pulse wave velocity (PWV) reflects arterial stiffness and it may be used as an indicator of atherosclerosis. This study was conducted to investigate the association of the PWV with metabolic syndrome. Methods: Among 1438 persons who visited the Internal Medicine Clinic or Health Center of a general hospital in Seoul, Korea, 384 adults (age range: 30-69 years old) were selected as study subjects. Those patients with cardiovascular disease or other systemic disease were excluded, but the patients with hypertension and diabetes mellitus were included. Ninety four (25.4%) subjects were classified as patients with metabolic syndrome when jointly applying the WHO Asia-Pacific criteria and NCEP ATPIII criteria. Results: The PWV was higher in the older aged group and in the men compared to the other group. The greater the number of diagnostic criteria of the metabolic syndrome subjects had, the higher was their PWV. After adjustment for age, gender, blood pressure, BMI and fasting blood glucose, a PWV change of 1.0 m/sec increased the risk of metabolic syndrome by 1.31 times (95% CI: 0.81-2.09). The risk of metabolic syndrome was 7.62 times higher among the subjects with a PWV greater than 7.5 m/sec (95% CI: 1.07-54.42), as compared with that of subjects with a PWV less than 7.5 m/sec. Conclusions: The PWV may independently increase the risk of metabolic syndrome as a non-linear pattern. A prospective study needs to be conducted to confirm the meaning of PWV as a risk factor for metabolic syndrome, and especially to determine the cut off point.(Korean J Med 73:384-392, 2007)