Plasticized polymer interlayer for low temperature fabrication of high quality silver nanowire-based flexible transparent and conductive film

Wonhee Cho,Jaeho Choi,Heetak Kim 한국고분자학회 2016 한국고분자학회 학술대회 연구논문 초록집 Vol.41 No.2

A Case of Infantile Fungal Urinary Tract Infection

Wonhee Cho,Young Min Jo,Yun Kyo Oh,Ji Woo Rim,Won Uk Lee,Kyongeun Choi,Jeong Hee Ko,Yeon Jin Jeon,Yumi Choi 대한소아신장학회 2019 Childhood kidney diseases Vol.23 No.2

Urinary tract infection is common in the pediatric population. The most common causative agents are bacteria, among which Escherichia coli is the most frequent uropathogen. Although fungal urinary tract infection is rare in the healthy pediatric population, it is relatively common among hospitalized patients. Fungus may be isolated from the urine of immunocompromised patients or that of patients with indwelling catheters. The most common cause of funguria is Candida albicans . Although more than 50% of Candida isolates belong to non-albicans Candida , the prevalence of non-albicans candiduria is increasing. Herein, we report a case of community-acquired candiduria in a 4-month-old immunocompetent male infant who had bilateral vesicoureteral reflux and was administered antibiotic prophylaxis. He was diagnosed with urinary tract infection caused by Candida lusitaniae and was managed with fluconazole.

A Case of Infantile Fungal Urinary Tract Infection

Cho, Wonhee,Jo, Young Min,Oh, Yun Kyo,Rim, Ji Woo,Lee, Won Uk,Choi, Kyongeun,Ko, Jeong Hee,Jeon, Yeon Jin,Choi, Yumi Korean Society of Pediatric Nephrology 2019 Childhood kidney diseases Vol.23 No.2

Urinary tract infection is common in the pediatric population. The most common causative agents are bacteria, among which Escherichia coli is the most frequent uropathogen. Although fungal urinary tract infection is rare in the healthy pediatric population, it is relatively common among hospitalized patients. Fungus may be isolated from the urine of immunocompromised patients or that of patients with indwelling catheters. The most common cause of funguria is Candida albicans. Although more than 50% of Candida isolates belong to non-albicans Candida, the prevalence of non-albicans candiduria is increasing. Herein, we report a case of community-acquired candiduria in a 4-month-old immunocompetent male infant who had bilateral vesicoureteral reflux and was administered antibiotic prophylaxis. He was diagnosed with urinary tract infection caused by Candida lusitaniae and was managed with fluconazole.

DTG Big Data Analysis for Fuel Consumption Estimation

( Wonhee Cho ),( Eunmi Choi ) 한국정보처리학회 2017 Journal of information processing systems Vol.13 No.2

Big data information and pattern analysis have applications in many industrial sectors. To reduce energy consumption effectively, the eco-driving method that reduces the fuel consumption of vehicles has recently come under scrutiny. Using big data on commercial vehicles obtained from digital tachographs (DTGs), it is possible not only to aid traffic safety but also improve eco-driving. In this study, we estimate fuel consumption efficiency by processing and analyzing DTG big data for commercial vehicles using parallel processing with the MapReduce mechanism. Compared to the conventional measurement of fuel consumption using the On-Board Diagnostics II (OBD-II) device, in this paper, we use actual DTG data and OBD-II fuel consumption data to identify meaningful relationships to calculate fuel efficiency rates. Based on the driving pattern extracted from DTG data, estimating fuel consumption is possible by analyzing driving patterns obtained only from DTG big data.

DTG Big Data Analysis for Fuel Consumption Estimation

Cho, Wonhee,Choi, Eunmi Korea Information Processing Society 2017 Journal of information processing systems Vol.13 No.2

Big data information and pattern analysis have applications in many industrial sectors. To reduce energy consumption effectively, the eco-driving method that reduces the fuel consumption of vehicles has recently come under scrutiny. Using big data on commercial vehicles obtained from digital tachographs (DTGs), it is possible not only to aid traffic safety but also improve eco-driving. In this study, we estimate fuel consumption efficiency by processing and analyzing DTG big data for commercial vehicles using parallel processing with the MapReduce mechanism. Compared to the conventional measurement of fuel consumption using the On-Board Diagnostics II (OBD-II) device, in this paper, we use actual DTG data and OBD-II fuel consumption data to identify meaningful relationships to calculate fuel efficiency rates. Based on the driving pattern extracted from DTG data, estimating fuel consumption is possible by analyzing driving patterns obtained only from DTG big data.

Hadoop 플랫폼을 이용한 교통데이터 기반 사용자 경로탐색 방법론

조원희 ( Wonhee Cho ),최은미 ( Eunmi Choi ) 한국정보처리학회 2013 한국정보처리학회 학술대회논문집 Vol.20 No.2

본 연구는 최근 활성화된 스마트폰 내비게이션의 교통정보를 이용 시 상대적으로 품질이 취약한 지방지역의 빠른길 및 통행시간 정확도를 개선하는 방안에 대한 연구이다. 본 연구에서는 Hadoop기술을 이용하여 교통데이터에 대한 방대한 양의 데이터를 분석 처리한다. 특히, 실시간 교통정보가 제대로 수집되지 않는 지역의 도로 속도 정보에 대한 개선 방안으로 고객 단말로부터 올라오는 위치 데이터를 실시간으로 수집하여 전자지도 기본 속성값을 실시간 통계 데이터로 교체 반영하여 상대적으로 취약한 지방지역의 경로 품질 및 경로 탐색을 개선하는 방안을 제시하였다. 단말로부터 올라오는 많은 양의 GPS 위치정보등 대용량 데이터 처리를 위해 오픈소스프로젝트인 Hadoop플랫폼 환경에서 빅데이터 처리용 오픈소스를 활용하여 고가의 RDBMS를 대체하는 효과와 시간 단축의 효과를 기대할 수 있게 되었다.

HBase를 이용한 GPS궤적 빅데이터 맵매칭 시스템

조원희 ( Wonhee Cho ),최은미 ( Eunmi Choi ) 한국정보처리학회 2015 한국정보처리학회 학술대회논문집 Vol.22 No.1

최근 GPS가 기본 탑재된 스마트폰이 활성화된 이후 대량의 GPS궤적 데이터를 전자지도에 매칭하여 분석하는 요구가 대두되고 있다. 그러나 기존에 연구된 맵매칭 기법은 주로 내비게이션용 알고리즘으로 대량의 GPS궤적을 서버에서 분석하기에는 속도 및 시스템 성능의 이슈가 있다. 본 연구는 대표적인 분산 NoSQL DB인 하둡 에코시스템의 HBase를 이용한 맵매칭 시스템에 대한 연구이다. 맵매칭을 위한 전자지도를 HBase탑재하기 위한 테이블 사양을 정의하였고, HBase와 연동하여 분석하는 맵매칭 알고리즘을 제시하고 Java로 구현하여 분석하였다. 이를 통해 대량의 GPS궤적을 NoSQL 기반 방법론을 통하여 효율적으로 빅데이터를 분석하였다.

蒙·元 제국 約會 제도의 변천과 종교

조원희(Cho, Wonhee) 동양사학회 2018 東洋史學硏究 Vol.145 No.-

This article examines the so-called institution yuehui 約會 or the “joint courts,” an institution that was established during the Mongol rule of China in the 13th to 14th century. The “joint courts” indicated a legal procedure in which two or three representatives met together to address a case involving different parties. Previous studies have mostly focused on this system within the larger Yuan-dynasty legal framework, and clarified the institutional characteristics such as the legal procedures. Based on these previous research, this article specifically focuses on the case of the “joint courts” involving religions, such as the Buddhist and Daoists. The main purpose of this article is to emphasize the establishment of this legal institutions, to scrutinize the changes over time, and to examine what factors contributed to these changes. The main examples examined are 1) the establishment of the joint court in 1261, followed by the expansion of the legal rights that the religious groups enjoyed during the period around 1300, and 2) the brief abolition and restoration of the joint court system around 1311 to 1313. Through this examination, I emphasize how the changing regulations regarding the religions and joint court were a result of the continuous interaction between the state and the different religions. The changes were by no means a one-sided decision lead by the state alone. In fact, the changes demonstrate the conflicts, negotiations, and interaction that occurred in the multi-religious and diverse society under the Mongol rule of China.

뭉케 카안 즉위 과정의 재검토를 통해서 보는 『集史』의 편향성

조원희(Wonhee Cho) 한국몽골학회 2021 몽골학 Vol.- No.67

본 논문은 이른바 ‘톨루이 혁명,’ 즉 몽골제국의 카안 위(位)가 칭기스 칸의 셋째 아들 우구데이의 후손에서 네 번째 아들 톨루이의 후손으로 넘어간 시기, 구체적으로 몽골 제국의 3대 카안 구육(재위 1246-1248)의 사망 이후 4대 카안 뭉케 카안으로 넘어가는 과정의 일련 사건을 분석함으로써 『集史』의 편향성을 분석하고자 한다. 주로 『集史』와 『征服者史』의 기록을 분석하여 『集史』의 특징은 무엇인지를 분석하고, 두 사료 간의 차이가 단순히 차이가 아닌 특정한 목적, 즉 뭉케 카안 즉위의 정당성을 강조하기 위한 것이었음을 보았다. 이를 위해서 먼저 『征服者史』와 『集史』의 내용을 자세히 비교 분석 후, 각 사료가 가진 특징을 분석하고, 특히 『集史』의 서술에 포함된 여러 모순을 도출하여 『集史』가 어떤 면에서 신빙성과 정확성이 부족한지, 그리고 궁극적으로 어떤 편향성을 가졌는지 살펴보았다. This article re-examines the so-called Tolui Revolution, i. e. the transition of the Qa’an position from the descendants of Ögödei to Tolui, specifically around the events after the death of Güyuk (r. 1246~1248) to the succession of Möngke (r. 1251~1259). Previous studies have primarily focused on reconstructing the events around the succession of Möngke, mostly assuming that all of the relevant sources are mostly historically reliable sources and paying only limited attention to critically evaluating the reliability or bias of the various sources. Through this re-examination, the study identifies the bias within Rashid al-Din’s Collected Histories (Jāmi at-tavārīkh). This will be done through a close comparison of The History of the World Conqueror of Juvaynī and Rashid al-Din’s Collected Histories, and argue that the difference between the two sources has a significant underlying purpose, namely, the justification of the Möngke’s succession to the degree that it distorts important basic facts. Through this examination, I first identify how Rashid al-Din’s Collected Histories emphasized the justification of Möngke’s succession, while seemingly excluding any challenges from Batu Khan, and emphasizing how the descendants of Ögödei and Chaghatai opposed Möngke. Additionally, I identify multiple examples within the Collected Histories that are inconsistent and factually problematic or confusing. For example, a single person is recorded to have been executed, but later found to be alive; in another example, a descendant of Chaghatai is said to have been punished by Möngke, but later a general is dispatched to keep him in check; in another example, a person reported to be at the grand assembly is later recorded as arriving after the assembly was over. Coincidently (or not), these inconsistencies are only found in the Collected Histories but not in The History of the World Conqueror. Based on these examples, I argue the seemingly more readable account of Rashid al-Din is internally incoherent with multiple self-contradicting records, and how these inconsistencies serve to show the legitimacy of Möngke’s succession.

몽원 제국 시기 ‘종교’의 정의에 대한 재검토 - 유대인, 白雲宗, 儒人의 비교를 중심으로 -

조원희(Cho, Wonhee) 동양사학회 2019 東洋史學硏究 Vol.148 No.-

This article examines how the ruling Mongols perceived and understood the different “religions,” focusing on the less familiar, the more minor “religions” during the Mongol rule of China. Specifically, it will focus on the Jews, White Cloud Sect (baiyunzong 白雲宗) and the Confucians. Although most modern scholars would generally agree that these three religions would all fit into what we would call “religions,” the analysis in this research demonstrates that the status of each of the three different religions differed significantly. Unlike the Buddhists, Daoists, Christians, and Muslims, the Jews were often treated as a subgroup of the generic “westerners (huihui 回回)” and did not receive the tax exemption privileges. The White Cloud Sect once established themselves as a separate sect from the larger Han Chinese Buddhists, but due to their reliance of influential individuals such as the Yanglianzhenjia and Danba, their influence in the central court quickly diminished after the death of these two figures. In the early days of the Mongol empire, Confucians were often grouped with other religions, but later the Mongol treated them as a group of individuals who could contribute to the Mongol empire through their knowledge and education. In other words, in the eyes of the Mongols, the three different “religions” were not merely the same, and the relationship between each religion and the Mongol state determined each religions fact. And in that sense, I argue that emphasis on the rulers, and focus on the relation between the empire and subjects can be another useful way to approach and analyze “religions” in history.