• Journal of IKEEE
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• v.22 no.3
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• pp.539-547
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• 2018

Grid-connected inverter is required to cut off the power supplied to the grid at the islanding condition, immediately. For this reason, an islanding detection is an indispensable function for grid-connected distributed generation system. Slip-Mode frequency Shift (SMS) islanding detection method is very popular method to determine the grid state. SMS method supplies the reactive power to the load according to the grid frequency. In the islanding condition of grid, this injected reactive power pulls out the grid frequency from the allowable range, then the inverter system can detect the islanding condition of the grid. The SMS method can detect the islanding state well and does not generate any harmonics of the grid current. However, the reactive power would be generated and the power quality is reduced even though the grid is not islanding condition, but normal condition. In this paper, a modified SMS method is proposed to remove the reactive power in the normal condition. The performance of the proposed method is evaluated by 600W single phase inverter experimental results.

• The Journal of Korean Medicine
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• v.26 no.1 s.61
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• pp.187-194
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• 2005

Objective: Two Korea-mode sport beverages with medicinal herbs added, Saeng Mac San (SMS) and Je Ho Tang (JHT), were developed by the Ginseng Research Group of the Korea Food Research Institute. For their practical usage, we examined their taste tests at rest including sense-analysis (S-A) and preference-inquiry (P-I). Methods: Five beverage-treatments, SMS, JHT and three commercial sport beverages (CSBs) and a control (CON) were offered randomly. Eighty-two subjects under stable control of their taste sense filled out the questionnaires for their S-A and p-I, which were developed by the Exercise Physiology Laboratory of Kyungpook National University. The collected data $(means{\pm}SD)$ were analyzed by repeated measures one-way ANOVA; Tukey' s test was administrated for identification of statistically significant differences (p<0.05). Results: Overall beverage likeability values of SMS and JHT were significantly lower than those of CSBs, JHT lower than CON. Overall flavor values of SMS and JHT were significantly lower than those of CSBs and CON. SMS was similar to CON in the amount of flavor. SMS and JHT were less tart than CSBs and the former was significantly lower than CSBs and CON in four drinkability-related items. Conclusion : SMS rated less than CSBs in tartness and the amount of flavor. JHT was avoided most. Thus, the results indicate that JHT is not fit as a sport beverdge and the overall likeability of SMS must be elevated by way of strengthening its tartness and amount of flavor for practical usage.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2003.05a
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• pp.534-537
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• 2003

The patient monitoring system is equipment that is taking and displaying vital signals from patient. among the rest, the patient monitoring system for doctor guarantee mobility. So, doctor can use information of patients at any time, in any place. The proposed patient monitoring system to get more mobility, efficiency, and have good function. SMS Protocol in CDMA have profits which is low power, low cost, and low microwave output.

• Proceedings of the IEEK Conference
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• 2001.06a
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• pp.125-128
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• 2001

본 논문에서는 SMS 트래픽을 측정하고 트래픽의 주요 통계량에 대해 측정 자료를 기반으로 추정값을 구한다. 이어서 측정자료에 대한 관찰에 기초하여 가입자 큐잉 시스템을 근간으로 하는 SMS 트래픽 모델을 구축한다. 또한 이러한 모델로부터 모의 실험을 통해 트래픽을 발생시키고 주요 통계량에 대한 추정값을 구해서 측정자료를 바탕으로 한 추정값과 비교하여 개발된 SMS 트래픽 모델의 정확성을 검증한다.

• Annual Conference of KIPS
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• 2003.11b
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• pp.1057-1060
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• 2003

네트워크 사용자들의 다양한 요구를 수용하고 신뢰성이 있는 서비스를 제공하기 위하여 많은 통신 사업자들은 SLA(Service Level Agreement)를 제공하고자 하고 있다. 통신 사업자들은 다양한 네트워크 서비스를 제공하고 있으며 각 네트워크 서비스에 대한 SLA 를 제공하기 위한 SLA 시스템은 유연한 구조를 가져야 한다. SLA 서비스는 계속적인 상황 감시를 통해 서비스 이용자와 계약 상황이 지켜질 수 있도록 해야 한다. 이를 위해서는 SLA 시스템 운용자의 부재시에 운용자에게 긴급 상황을 알려 주는 SMS(Short Message Service) 제공이 필요하다. SLA 시스템 운용자는 여러 등급이 존재하며 관리해야 하는 사항과 서비스도 다양하다. 이런 경우를 고려하여 효과적인 SMS 기능을 SLA 시스템 운용자에게 제공하는 SMS 기능을 본 논문에서 설계하고 구현하였다.

• Journal of the Korea Safety Management & Science
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• v.7 no.5
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• pp.43-58
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• 2005

According to Korea was re-elected as ICAO council member state at the 35th session of the assembly, there are more contributions and roles of international aviation society. Being developed technology and grown international transportation, world is focusing to aviation safety, Safety Management System(SMS) is systematic approach to manage risks caused by human and organizational factors. ICAO is specified that 'As of 24 November 2005, certified aerodrome shell have in operation a safety management system.' at Annex 14 to implement it airports as a first step. This study introduced SMS principle, analysed SMS's of advanced states and developed appropriate Korean Aerodrome SMS Model in our cultural and industrial circumstances.

• Proceedings of the Korean Society of Computer Information Conference
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• 2014.01a
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• pp.357-360
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• 2014

현대 사회에서는 휴대 전화 때문에 신속하고 효율적이 된다. 사람은 휴대 전화를 이용해서 서로 통신할 수 있다. 그리고 안드로이드가 빠르게 발전하고 다양한 지능 전자 상품에서 사용하고 있다. 본 논문에서는 구글 안드로이드 플랫폼기반으로 스마트폰의 SMS 관리 응용 애플리케이션을 설계 및 구현하였으면 기본 메시징 기능뿐만 아니라 블랙리스트 및 모바일 그룹 채팅 기능을 포함하고 있다. 그룹 채팅 기능은 네트워크 환경을 기반으로 설정될 수 있다. 모바일 네트워크가 켜져있을 때, 네트워크 트래픽 그룹 채팅을 사용할 수 있고 모바일 네트워크가 꺼져있을 때, SMS 기능 그룹 채팅을 사용할 수 있다.

• Proceedings of the KIPE Conference
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• 2008.10a
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• pp.36-38
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• 2008

본 논문에서는 여러 대의 인버터를 동시에 사용하는 분산전원 환경하에서 Anti-islanding을 효과적으로 할 수 있는 방안을 제안한다. 제안하는 Anti-islanding기법은 SMS(Sliding Mode Frequency Shift)를 근간으로 하면서 공진 Q가 높을 때 검출이 어려운 단점을 해결하는 방법을 제시한다. SMS위상의 변동 값을 판단근거를 사용하지 않고 SMS위상의 적분 값을 판단근거로 사용한다. Run on시간이 0.5초 이내로 국내외 규격을 모두 만족시킨다. 여러 대의 인버터를 병렬로 접속해도 islanding 검출이 탁월하다. 출력전력의 품질 면에 있어서도 다른 Anti-islanding기법에 비해 우수하다. 본 알고리즘의 우수성을 시뮬레이션과 실험을 통해 검증하였다.

• Journal of Animal Science and Technology
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• v.64 no.4
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• pp.696-706
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• 2022

This study was conducted to evaluate the effects of dietary supplementation of Silybum marianum seed (SMS) extract on the growth performance, nutrient digestibility, fecal noxious gas emission, and hematology parameters in weaned piglets. A total of 120, 21-day-old weaned piglets ([Yorkshire × Landrace] × Duroc) were randomly assigned to 3 groups based on the average initial body weight (6.46 ± 0.45 kg). There were 8 replicate pens per treatment and 5 pigs (mixed sex) per pen. The experimental period was 42 days. Dietary groups included a basal diet, and a basal diet supplemented with 0.05% or 0.10% SMS extract. Feeding weaned piglets with SMS extract containing diet significantly increased average daily gain and average daily feed intake. Additionally, the supplementation of SMS extract had no significant effects on nutrient digestibility, serum hematology, and fecal noxious gas emission parameters. We considered that the supplementation of SMS extract had positive effects on the voluntary feed intake in weaned piglets, thus improving growth performance.

• Journal of Digital Contents Society
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• v.7 no.4
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• pp.295-300
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• 2006

A cell phone is a necessity for the modern society. The function of mobile phone enables us to exchange various information beyond the time and space. In addition it has lots of function such as shooting of moving picture. This study is to research the accuracy and rapidity of the information by means of SMS, and to propose a new system of transmission in order to create a profit for the life economy. Through the function, which is suggested in this paper, we can store the phone number to the sending category of the other party's phone by combining character or number. We can expect the most accuracy and swiftness of the cellphone information via of this proposed research.