Drought monitoring using high resolution soil moisture through multi-sensor satellite data fusion over the Korean peninsula

Park, Seonyoung,Im, Jungho,Park, Sumin,Rhee, Jinyoung Elsevier 2017 Agricultural and forest meteorology Vol.237 No.-

<P><B>Abstract</B></P> <P>Droughts, typically caused by the deficiencies of precipitation and soil moisture, affect water resources and agriculture. As soil moisture is of key importance in understanding the interaction between the atmosphere and Earth’s surface, it can be used to monitor droughts. In this study, a High resolution Soil Moisture Drought Index (HSMDI) was proposed and evaluated for meteorological, agricultural, and hydrological droughts. HSMDI was developed using the 1km downscaled soil moisture data produced from the Advanced Microwave Scanning Radiometer on the Earth Observing System (AMSR-E) from 2003 to 2011 (March to November) over the Korean peninsula. Seven products from the Moderate Resolution Imaging Spectroradiometer (MODIS) and Tropical Rainfall Measuring Mission (TRMM) satellite sensors were used to downscale AMSR-E soil moisture based on random forest machine learning. The downscaled 1km soil moisture was correlated well with both <I>in situ</I> and AMSR-E soil moisture with the mean coefficient of determination (<I>R<SUP>2</SUP> </I>) of 0.29 and 0.59, respectively. The Standardized Precipitation Index (SPI) with time scales from 1 to 12 months, crop yields (for sesame, highland radish, and highland napa cabbage) and streamflow data were used to validate HSMDI for various types of droughts. The results showed that HSMDI depicted meteorological drought well, especially during the dry season, with a similar pattern with the 3-month SPI. However, the performance fluctuated a bit during the wet season possibly due to the limited availability of optical sensor data and heterogeneous land covers around the stations. HSMDI also showed high correlation with crop yield data, in particular the highland radish and napa cabbage cultivated in non-irrigated regions with a mean <I>R<SUP>2</SUP> </I> of 0.77. However, HSMDI did not monitor streamflow well for hydrological drought presenting a various range of correlations with streamflow data (from 0.03 to 0.83).</P> <P><B>Highlights</B></P> <P> <UL> <LI> Surface variables were integrated to produce high resolution soil moisture (1km). </LI> <LI> Machine learning was used to model high resolution soil moisture. </LI> <LI> High resolution Soil Moisture Drought Index (HSMDI) was proposed. </LI> <LI> HSMDI was evaluated for three types of droughts. </LI> <LI> HSMDI provided good performance to monitor meteorological and agricultural droughts. </LI> </UL> </P>

Detection of tropical cyclone genesis via quantitative satellite ocean surface wind pattern and intensity analyses using decision trees

Park, Myung-Sook,Kim, Minsang,Lee, Myong-In,Im, Jungho,Park, Seonyoung American Elsevier Pub. Co 2016 Remote sensing of environment Vol.183 No.-

<P><B>Abstract</B></P> <P>Microwave remote sensing can be used to measure ocean surface winds, which can be used to detect tropical cyclone (TC) formation in an objective and quantitative way. This study develops a new model using WindSat data and a machine learning approach. Dynamic and hydrologic indices are quantified from WindSat wind and rainfall snapshot images over 352 developing and 973 non-developing tropical disturbances from 2005 to 2009. The degree of cyclonic circulation symmetry near the system center is quantified using circular variances, and the degree of strong wind aggregation (heavy rainfall) is defined using a spatial pattern analysis program tool called FRAGSTATS. In addition, the circulation strength and convection are defined based on the areal averages of wind speed and rainfall. An objective TC formation detection model is then developed by applying those indices to a machine-learning decision tree algorithm using calibration data from 2005 to 2007. Results suggest that the circulation symmetry and intensity are the most important parameters that characterize developing tropical disturbances. Despite inherent sampling issues associated with the polar orbiting satellite, a validation from 2008 to 2009 shows that the model produced a positive detection rate of approximately 95.3% and false alarm rate of 28.5%, which is comparable with the pre-existing objective methods based on cloud-pattern recognition. This study suggests that the quantitative microwave-sensed dynamic ocean surface wind pattern and intensity recognition model provides a new method of detecting TC formation.</P> <P><B>Highlights</B></P> <P> <UL> <LI> A tropical cyclone genesis detection model is developed using remote sensing. </LI> <LI> Dynamical and hydrologic factors are quantified from WindSat. </LI> <LI> An objective model is constructed using decision trees algorithm. </LI> <LI> The model shows the circulation symmetry and intensity are the most important. </LI> <LI> Validation shows that the model produces high hit rate and low false alarm rate. </LI> </UL> </P>

Immunomodulatory Effects of Echinacea on the Restraint-Induced Immunosuppression in Mice

Seonyoung Park,Mak-Soon Lee,Sunyoon Jung,Seohyun Lee,Hye-yeon Son,Yangha Kim 한국식품영양과학회 2016 한국식품영양과학회 학술대회발표집 Vol.2016 No.10

『오레스테아』에 나타난 모친살해의 상징과 주체 형성

박선영(Seonyoung Park) 한국비평이론학회 2010 비평과이론 Vol.15 No.1

Just as the myth of Oedipus illuminates Freudian theory, Klein focuses on the myth of Orestes after diagnosing the matricidal fantasy in her clinic to discovery its underlying logic. Klein highlights a different sort of logical process that reflects subjective autonomy. In the ancient Greek tragedy, the murder of Orestes’s mother grants him freedom, though at the price of a depressive remorse that symbolizes the endless hounding of the Erinyes. Matricide clearly led to Orestes’s guilt, but he acquired an immense freedom and a preeminent symbolic capacity. Such an interpretation is not far removed from Sartre’s own reading of The Oresteia, a reading that informs his play Les Mouches. Klein shows the symbolic process by way of Dick’s case. She introduces Dick into the Symbolic through the constellation of the Oedipal triangle and brings about Dick’s Oedipal identification. The cult of the primary mother is a pretext for matricide in Klein. To get rid of the mother becomes the required condition for accessing the symbol.

조선시대 자연재해 기록에 대한 일고찰

박선영(Seonyoung Park),최지은(Jieun Choi),박경(Kyung Park),양보경(Bokyung Yang) 성신여자대학교 한국지리연구소 2014 應用地理 Vol.- No.31

연구는 《조선왕조실록(朝鮮王朝實錄)》에서 해일(海溢)로 검색되는 데이터를 추출·정리 하여 조선시대에 해일을 기록한 양상과 해일의 규모와 빈도, 피해상황과 시공간적 분포를 살펴보았다. ArcMap 9.3을 이용하여 지도화하였고, Base_map으로는 고려대학교 민족문화연구소, 조선시대 전자문화지도 중 대동여지도를 복원한 것을 이용하였다. 《조선왕조실록(朝鮮王朝實錄)》에 기록된 해일 기록은 네 가지 유형으로 나뉜다. 첫 번째는 단순한 해일 발생기록, 두 번째는 해일 피해에 대한 설명, 세 번째는 해일의 파고 및 해일 높이 기록, 네 번째는 해일에 의한 재산 또는 인명피해를 기록한 것이다. 조선시대 해일 기록의 빈도를 보면 먼저 연도별로 1701년에서 1750년 사이에 빈도수가 48건으로 가장 많았음을 알 수 있었다. 다음으로 1651년에서 1700년이 다음 순으로 40건, 1601년에서 1650년이 16건으로 나타난 것을 확인하였다. 조선 중기에 17세기~18세기 초에 해일 발생 기록이 많았음을 알 수 있었다. 이 시기는 잘 알려진 대로 소빙기와 같은 시대로 판단된다. 월별로는 7월이 35건으로 가장 많이 발생한 것으로 기록되었고, 다음 순으로는 6월이 20건, 8월이 18건순으로 나타났다. 여름철에 해일 발생 빈도수가 높다는 것을 알 수 있었다. 마지막으로 해일의 해안별 빈도수는 서해안이 가장 많았은 해일이 발생한 해안으로 나타났다. 정리된 자료를 통해 조선시대에 지진해일로 판단되는 해일과 우리나라 주변 지진과의 관련성을 검토한 결과 찾아보니, 일본 훗카이도 남서해역과 중국 산둥성에서 발생한 해일이 조선시대 지진해일에 영향을 준 것을 확인할 수 있었다. 조선시대 해일은 현대의 관점으로 분류되어 있지 않기 때문에 추가적 자료 조사 및 연구가 필요하고, 비변사등록, 승정원일기, 증보문헌비고, 군현지지 등 다른 고문헌 확인이 필요할 것으로 사료된다. This study analyzed old literatures including the Annals of Joseon Dynasty(朝鮮王朝實錄) and examined diverse high tide cases on geographical perspective by using ArcMap 9.3 and 《Daedongyeojido(1864)》 as a base map, of which the source is from the Chosun Culture Electronic Atlas at the Research Institute of Korea Studies in Korea University. High tide records in the Annals of Joseon Dynasty(朝鮮王朝實錄) can be classified into 4 categories: simple records of incidence, describing damages from the incidents, recording numerical values such as a wave height and a water level, and reporting casualties and property damages. According to the analysis on periodic distribution, it is found that tsunami was most frequently occurred on the largest scale from 1701 to 1750, followed by a period of 1651 to 1700 and a period of 1601 to 1650 respectively, which periods coincide with well-known Little Ice Age. By month, we found that high-tide incidents largely concentrated in summer from June to August in lunar calendar, especially in July. According to the analysis on regional distribution of high-tide hazards, it is found that they were occurred most frequently on the west coast. We found that tsunami reports in Joseon can traced to the occurrence of earthquake in neighboring nations. Tsunami occurred in the southwest coast of Hokkaido in Japan and earthquakes occurred in Shandong, China affected coastal areas in Joseon. Further studies are required by using other literatures such as Seungjeongwon ilgi The Daily Records of the Royal Secretariat of Josen Dynasty the Diaries of Royal Secretariat of Joseon Dynasty(承政院日記), Enlarged and Supplemented Encyclopedia of Historic Records of Joseon Dynasty the Collection of Korean Civilization & Institution Histories(增補文獻備考)and Bibyonsa Deungnok(備邊司謄錄) Records of the Border Defense Council etc.

HDFS 암호화 성능 분석

박선영(Seonyoung Park),이영석(Youngseok Lee) 한국정보과학회 2014 정보과학회논문지 : 데이타베이스 Vol.41 No.1

하둡(Hadoop)은 대용량 데이터를 저장하고 처리하는 플랫폼으로 널리 사용되고 있다. 현재 하둡은 커버로스(Kerberos)를 통해 사용자 인증, HDFS(Hadoop Distributed File system) 및 맵리듀스 접근 권한 설정과 클러스터의 노드 관리 등을 제공하지만 아직 데이터를 암호화하여 저장하지 않는다. 또한 하둡은 방대한 양의 데이터를 하나의 클러스터에 저장하기 때문에 데이터 유출과 같이 기업에 막대한 피해를 초래하는 보안 사고에 매우 취약할 수 밖에 없다. 본 논문에서는 Java API에 포함되어 암호화 기능을 제공하는 JCA(Java Cryptography Architecture)를 이용하여 HDFS 암호화를 구현하고 성능 실험을 진행하였다. AES로 암호화된 HDFS의 성능 실험 결과, 암호화는 HDFS의 구조적인 한계로 한 대의 클라이언트에서 단일 쓰레드로 처리하기 때문에 25%의 성능 저하를 보였지만 복호화는 맵리듀스에 의해 HDFS에 저장된 데이터를 다수의 클러스터 노드가 처리하기 때문에 5%의 성능 저하만을 보였다. 또한 클러스터를 구성하는 노드 수를 5대에서 30대까지 늘리는 실험에서는 노드 수에 상관없이 3∼4%의 성능 저하가 나타났다. Hadoop is widely used as a platform for storing and processing large data sets. Hadoop supports Kerberos authentication and authorization for HDFS(Hadoop Distributed File system) and MapReduce, but files are not stored in an encrypted form. In addition, since Hadoop stores a huge amount of data in a cluster, data loss can cause a very serious security incident. This paper presents a more secure HDFS with encryption using JCA(Java Cryptography Architecture) and evaluates its performance. The evaluation results show a performance degradation of 25% during storing files to AES encrypted HDFS because it is processed by only a client and a single thread. In contrast, in the decryption in MapReduce, the overhead is only 5% on average since it is possible to decrypt encrypted files on multiple nodes. In addition, the results of the experiment under the different numbers of nodes show a marginal overhead of about 3∼4%.

교사피드백과 언어적성이 초등학생의 문법 습득에 미치는 영향

박선영 ( Park Seonyoung ),구재명 ( Goo Jaemyung ) 글로벌영어교육학회(구 호남영어교육학회) 2017 Studies in English education Vol.22 No.4

The present study explores the effectiveness of two different corrective feedback (CF) moves in the learning of two English target features (English question formation and comparatives) and whether language aptitude mediates the extent to which learners benefit from the two CF moves in the process. Three 5th-grade intact classes were selected and randomly assigned to three conditions: implicit (recasts), explicit (explicit correction), and comparison (no feedback) conditions. Learners (N = 55) carried out various classroom activities including story retelling, information gap tasks, and guessing games over 4 treatment sessions. CF was provided in response to learners’ nontargetlike utterances (with respect to the two target features) during the treatment sessions, according to their group affiliation. Results show that the implicit feedback class outperformed the explicit feedback class, albeit not statistically significantly, in both written and oral measures on comparatives. With respect to the learning of question formation, the implicit condition also performed better in the written test than the explicit condition, but vice versa in the oral test. Language aptitude measured via LLAMA F was found to be significantly correlated with the efficacy of CF moves on the development of the two structures, but with target type and test type interacting with language aptitude.

근대 여성과 여행, 문화소비와 구별 짓기 -『신여성(新女性)』(1923-1934)과 『여성(女性)』(1936-1940) 담론을 중심으로-

박선영 ( Park Seonyoung ) 아시아문화학술원 2017 인문사회 21 Vol.8 No.5

본 논문은 여행문화가 조선의 근대적 여성 정체성을 형성하는데 중요한 역할을 했다는 점에 주목한다. 이에 연구목적을 여성잡지 『신여성』과 『여성』에서 유의미한 공통유형을 추출해 여행문화의 변별성을 드러내고 여성사적, 문화사적 의미를 제고하는 것에 둔다. 본 연구의 연구방법은 당대 여성의 여행문화, 여행의 사회적 가치, 미디어의 여행 표상을 의미화하는 매체분석방법론이다. 관광담론에서 여성은 관광의 특정요소를 강조하거나 배제한다. 원족과 하이킹은 건강담론에서 발전한 유희와 아름다움을 강조한다. 교육담론은 대사회적 책무, 희생과 봉사심 등을 내세운다. 결론적으로 1920년대~30년대 여성 잡지 내 여행담론은 다양한 서사전략을 통해 여성의 사회정체성 형성에 관여하였다. 여성의 여행은 매체를 범위로 한 연구를 통해 윤리적 일탈에 대한 잠재적 비난, 대응전략의 차별화로 확장되어야 한다. This study paid attention to the finding that the travel culture played an important role in the formation of modern women’s identity in Joseon. The scope of the present study included the related discourse published in Sinyeosung and Yeosung, which were representative women’s magazines in the 1920s and 1930s, to analyze the travel culture of modern women, the social values of travel, relations between the subject and the object of watching, and the travel representations of the media. The goals of the study were to reveal the distinctive characteristics of the travel culture of women those days by extracting the types of significant vertical commonality from the related articles and address its meanings in the history of women and culture. There is a need to take interest in women's consumption, curiosity and latent criticism of ethical deviation, and differentiation of response strategies in an analogous study with the media as its scope.

CFD모델을 이용해 타이어와 브레이크 마모가 도심 내 PM2.5에 미치는 영향 파악

박선영(Seonyoung Park),김재진(Jae Jin Kim),최진영(Jinyoung Choi),이대균(Daegyun Lee),김민중(Minjoong Kim) 대한환경공학회 2022 대한환경공학회 학술발표논문집 Vol.2022 No.11

불안, 거울단계, 부정성

박선영(Seonyoung Park) 한국비평이론학회 2009 비평과이론 Vol.14 No.1

This paper is intended to reveal psychic development of infants. Between six and eight months old, a child begins to recognize a familiar figure, in particular the mother, and a stranger. The child manifests anxiety when a stranger approaches him. Spitz call it the second organizer. The so-called eight-month-anxiety is the sign of attachment and true object relation, an indicator of new achievement. But this anxiety isn't merely an adaptive mechanism and it's understanding needs a deep, psychoanalytic interpretation. In Freudian thought, eight-month-anxiety is a response to the child's perception that the stranger's face is not identical with the memory of mother's face, which is so-called a dangerous situation. Many attachment theorists and Spitz agree to this idea. This early dangerous situation is an anxiety not only from the strangers, but also from the primary mother(a mother's body) who is Thing(das Ding). When Thing isn't symbolized, the young subject feels anxiety. In Sartre's perspective, being seen, rather than seeing, is the cause of the anxiety of an eight-month-old baby. The mother's look is supportive and affectionate while stranger's look is alienating, so the stranger's look give rise to anxiety in child. We often see that the child continues to look at the stranger, even if he is in the arms of his mother because the stranger evokes the child's epistemorphilic drive and curiosity in the development process. Anxiety and horror which are caused by primary mother (Thing) make the baby look at the stranger, keep distance from the real mother. So the other's look contain's the baby's anxiety and is needed for the development of the subject in Lacan and Klein. In this context what Lacan's mirror stage indicates becomes clear. Mirror stage is not simply imaginary but also symbolic. To arrive at the imaginary identity the baby need the symbolic, pacifying looking of the Other. So the eight month anxiety means not only the horror against the stranger, but also could be a defence against the persecuting imaginary mother. In the middle of the second year, the child's no-saying to the mother emerges, which is accompanied by a feeling of autonomy. The child's no-saying means the acquisition of communicative, symbolic capacity and the beginning of autonomy. Saying "no" as a means of separating from the mother is to accept The Name of Father, a triadic symbolic structure.