전술통신망 성능분석을 위한 네트워크 시뮬레이터 구현

최정인,신상헌,백해현,박민호,Choi, Jeong-In,Shin, Sang-Heon,Baek, Hae-Hyeon,Park, Min-Ho 한국군사과학기술학회 2013 한국군사과학기술학회지 Vol.16 No.5

This paper studied about the design and implementation of tactical communication network simulator in order to obtain tactical communication network parameter, such as link capacity and routing plan, and a number of exceptional cases that may occur during actual deployment by conducting simulation of a large-scale tactical communication networks. This tactical communication network simulator provides equipment models and link models of commercial OPNET simulator for tactical communication network. In addition, 6 types of simulation scenario writings convenience functions and traffic generation models that may occur in situations of tactical communication network environment were implemented in order to enhance user friendliness. By taking advantages of SITL(System-In-The-Loop) function of OPNET, the tactical communication network simulator allows users to perform interoperability test between M&S models and actual equipment in operating simulation of tactical communication network, which is run on software. In order to confirm the functions and performance of the simulator, small-scale of tactical communication network was configured to make sure interoperability between SITL-based equipment and a large-scale tactical communication network was simulated and checked how to cope with traffic generated for each network node. As the results, we were able to confirm that the simulator is operated properly.

고춧가루의 저장 온도와 기간에 따른 이화학적 품질 특성 변화

최정인,오혜인,조미숙,오지은,Choi, Jeong In,Oh, Hye In,Cho, Mi Sook,Oh, Ji Eun 한국식생활문화학회 2018 韓國食生活文化學會誌 Vol.33 No.2

This study was carried out to determine the optimal storage conditions by examining the effects of the storage conditions on the quality of red pepper powder during storage in households. Red pepper powder was stored at room temperature ($20^{\circ}C$), refrigeration (2 and $-1^{\circ}C$) and frozen (-5 and $-20^{\circ}C$) for 3, 6, 9 and 12 months. The ASTA color value, capsanthin content and redness ($a^{\ast}$) of the red pepper powders stored at -5 and $-20^{\circ}C$ were not decreased significantly depending on the storage temperatures until 9 months. The pH of red pepper powder stored at $20^{\circ}C$ decreased significantly until 9 months and increased at 12 months. The microbiological quality of the red pepper powder stored at -5 and $-20^{\circ}C$ was more stable during long-term storage. In the sensory evaluation of red pepper powder stored under all conditions, the overall freshness, redness, hot flavor, moisture release, and edibility decreased with increasing storage period from the control to 12 months. Moisture release increased from 3 months to 12 months. Overall, red pepper should be stored at low temperatures (2, $-1^{\circ}C$) for up to 6 months, and frozen (${\geq} -5^{\circ}C$) for 6 to 9 months. The optimal temperature for long-term storage (${\geq}9$ months) was $-20^{\circ}C$.

시계열 자료에서의 특이치 발견

최정인,엄인옥,조형준,Choi, Jeong In,Um, In Ok,Choa, Hyung Jun 한국통계학회 2016 응용통계연구 Vol.29 No.5

This study suggests an outlier detection algorithm that uses quantile autoregressive model in time series data, eventually applying it to actual stock manipulation cases by comparing its performance to existing methods. Studies on outlier detection have traditionally been conducted mostly in general data and those in time series data are insufficient. They have also been limited to a parametric model, which is not convenient as it is complicated with an analysis that takes a long time. Thus, we suggest a new algorithm of outlier detection in time series data and through various simulations, compare it to existing algorithms. Especially, the outlier detection algorithm in time series data can be useful in finding stock manipulation. If stock price which had a certain pattern goes out of flow and generates an outlier, it can be due to intentional intervention and manipulation. We examined how fast the model can detect stock manipulations by applying it to actual stock manipulation cases. 본 논문의 목표는 분위수 자기회귀모형을 활용하여 시계열 자료에서 특이치를 발견하는 알고리즘을 제안하고, 기존의 방법들과 그 성능을 비교하여 실제 주가 조작 사례에 적용해 보는 것이다. 지금까지의 특이치 발견 연구는 대부분 일반적인 데이터 형태에서만 있어왔기 때문에 시계열 데이터에서의 연구는 미미한 편이다. 또한 모수적인 방법에만 제한되었는데, 모수적 모형은 복잡할 뿐만 아니라 소요되는 분석 시간도 길기 때문에 편리하지 않다. 따라서 본 연구에서는 분위수 자기회귀모형을 활용한 특이치 발견 알고리즘을 새롭게 제시하고, 다양한 경우의 모의실험을 통해 기존 알고리즘과 비교하도록 한다. 특히 시계열 자료에서의 특이치 발견은 주가 조작을 적발하는 데에 유용하게 활용될 수 있다. 시간에 따라 관측되던 주가가 갑자기 그 동안의 흐름에서 벗어나 특이치로 발견되었다면 혹시 인위적인 개입으로 조작된 것은 아닌지 의심해 볼 수 있기 때문이다. 따라서 실제 주가 조작 사례에 적용해 봄으로써 얼마나 빠른 시일 내에 주가 조작을 적발해 낼 수 있는지 살펴보았다.

아사이베리를 첨가한 샐러드드레싱의 품질특성 및 항산화활성

최정인,정해정,Choi, Jeong-In,Chung, Hai-Jung 한국식생활문화학회 2017 韓國食生活文化學會誌 Vol.32 No.5

This study was conducted to evaluate the quality characteristics and antioxidant activities of salad dressing prepared with acaiberry powder (0, 1, 3, and 5%). The pH and titratable acidity increased as the acaiberry powder increased. The sugar content showed no significant differences between samples. The viscosity was lowest in the controls and increased with increasing amounts of the acaiberry powder. The lightness and yellowness values decreased, while the redness values increased with increasing amounts of acaiberry powder. The total polyphenol content ranged from 10.26-45.19 mg GAE/100 g, increasing with increased acaiberry powder levels. The antioxidant activities measured via DPPH radical scavenging activity, reducing power and FRAP also increased with increasing acaiberry powder concentrations. Finally, a consumer acceptance test revealed that up to 3% acaiberry powder could be added to salad dressing to provide high antioxidant activity without sacrificing sensory quality.

경기북부지역 주요 호소수의 수질오염특성 평가

최정인(Jeong-in Choi),임흥빈( Heung-bin Im),정은희(Eun-hee Jung),김태열(Tae-yuel Kim),손영금(Yeong-geum Son),고순미(Sun-mi Ko),이호정(Ho-jung Lee),오조교(Jo-gyo Oh) 한국환경보건학회 2018 한국환경보건학회지 Vol.44 No.4

Objectives: A lake is a place used by many people, and compared to rivers it is easy for them to become polluted. The water quality in lakes and reservoirs has been worsening recently. The purpose of this study is to evaluate the water pollution characteristics of major lakes in northern Gyeonggi-do Province. Methods: Six lakes were selected as major lakes and were evaluated in terms of water pollution characteristics and eutrophication (as defined by results for COD Mn , TOC, SS, Chl-a, T-N and T-P) over one year (from December 2016 through November 2017) in northern Gyeonggi-do Province. Results: The annual average COD Mn was found to be 3.1 mg/L in Onam, 3.6 mg/L in Sanjeong, 4.7 mg/L in Gisan, 4.8 mg/L in Ilsan, and 6.1 mg/L in Jangja. The results of the Korean trophic state index (TSI KO ) value indicated a eutrophic state (TSI KO 59.0) in Jangja lake. The other lakes were classified as being in a mesotrophic state (TSI KO of 38.1 in Sanjeong, 40.2 in Ilsan, 41.9 in Onam, 46.1 in Gisan, and 47.8 in Gomo). Conclusions: Ilsan Lake’s water quality is being well maintained. Sanjeong, Onam, and Gisan are appropriate for use as agricultural water. Jangja lake requires efforts for water quality improvement and to prevent the inflow of non-point pollutant sources.

무선통신을 이용한 시각장애인의 상황인지 시스템

최정인(Jeong In Choi),이기영(Ki Young Lee),이돈희(Don Hee Lee) 한국IT마케팅학회 2015 한국IT마케팅학회 논문집 Vol.1 No.1

Information Technology is expanding to various industrial fields. The trend was behind the birh of a new form of IT service combined with devices and wireless communication technologies. This paper designs and implementations a system that helps the visually impaired to determine a situation through devices and applications by using wireless communication technology. As part of the ETA service, the user’s mobile application and devices communicate through Bluetooth and identify destinations and obstacles. Finally they are informed to the user. It is expected that the visually impaired can take advantage of an easy and accurate direction service through the system we propose in the study.

ATM - XTI를 사용한 CMIP - over - ATM의 설계 및 구현

최정인(Jeong In Choi),신상헌(Sang Heon Shin),김영탁(Young Tak Kim) 영남대학교 정보통신연구소 1998 정보통신연구소논문집 Vol.5 No.1

N/A

Stacked RRAM과 Binary-Sized Coupling Capacitors 이용한 고해상도 가중합을 위한 VMM cell

최정인(Jeong-In Choi),권기원(Kee-Won Kwon) 대한전자공학회 2023 대한전자공학회 학술대회 Vol.2023 No.6

무선통신을 이용한 시각장애인의 상황인지 시스템

최정인(Jeong In Choi),이기영(Ki Young Lee),이돈희(Don Hee Lee) 한국IT마케팅학회 2015 한국IT마케팅학회 학술대회 Vol.2015 No.1

Information Technology is expanding to various industrial fields. The trend was behind the birh of a new form of IT service combined with devices and wireless communication technologies. This paper designs and implementations a system that helps the visually impaired to determine a situation through devices and applications by using wireless communication technology. As part of the ETA service, the user’s mobile application and devices communicate through Bluetooth and identify destinations and obstacles. Finally they are informed to the user. It is expected that the visually impaired can take advantage of an easy and accurate direction service through the system we propose in the study.

소셜데이터를 활용한 재난예방 애플리케이션 설계 및 구현

최정인(Jeong In Choi),박초롱(Cho Rong Park),이기영(Ki Young Lee),권정호(Jeong Ho Kwon) 한국IT마케팅학회 2015 한국IT마케팅학회 논문집 Vol.1 No.1

We are now comfortable with the development of the cutting-edge technology, quality lives. However, the Safety of forest fires and earthquakes worldwide human today's technology and a barrier and as such can not succeed in holding back the progress of civilization. To prevent this disaster forecasting system in many countries to design and implement these disaster management system is bifurcating Specially, our country, have a disaster for an accident.Information transfer and communication system is not enough. In this paper, disaster or accident management system more systematically trying to convey a bit. Sns realise what currently under no circumstances, the crisscrossing the words of text mining applications, requesting disaster relief systems design and implementation.