포항지진의 피해 결과를 반영한 기존 저층 필로티 건물의 지진취약도함수

김진영,김태완,Kim, Jinyoung,Kim, Taewan 한국지진공학회 2021 한국지진공학회논문집 Vol.25 No.6

Current seismic fragility functions for buildings were developed by defining damage state threshold based on story drift concerning foreign references and using the capacity spectrum method based on spectral displacement. In this study, insufficient details and dependence on the core location of piloti-type buildings were not reflected in the fragility function because it was developed before the Pohang earthquake. In order to develop an improved one for piloti-type buildings, several types of core were selected, damage state threshold was determined based on the capacity of structural members, and three-dimensional analyses were utilized. As a result, seismic fragility functions based on spectral acceleration were developed for various core locations and different shear strengths of the column stirrup. The fragility of piloti-type buildings significantly varied according to core location, an additional single wall, and whether the contribution of column stirrup was included or not. To estimate fragility more reasonably, it is necessary to prepare the parameters to reflect actual state well.

경기지역 삼국시대 횡혈식석실묘의 구조특징과 축조주체 검토

김진영 ( Kim¸ Jinyoung ) 단국사학회 2020 史學志 Vol.60 No.-

경기지역은 삼국이 모두 영유하였던 지역으로 삼국의 횡혈식석실묘가 공존하였고, 박장에 구조적 동질성이 강하여 축조주체 변별에 어려움이 많아 삼국의 고분문화 규명에 상당한 오류를 초래하였다. 그렇기에 경기지역 삼국시대 횡혈식석실묘 중 축조주체 귀속에 있어 재고의 여지가 있는 석실묘의 구조적 차이를 검토하여 축조주체를 명확히 하였다. 기존 축조주체 관련 연구성과와 더불어 입지와 석실의 평면형태, 규격성, 축조방법, 장법 등을 보다 면밀히 검토한 결과, 기존 연구에서 한성기 백제석실로 비정한 것은 고구려·신라와의 묘·장제 차이가 뚜렷하여 재론의 여지가 적은 반면, 신라 석실로 보고된 상당수 석실은 고구려 영역기에 조영된 것으로 파악되었다. 아울러 축조주체 논란이 지속되었던 가락동·방이동 고분군은 가락동 3호와 5호를 제외하고는 신라 석실임을 더욱 공고히 하게 되었다. 이 같은 연구결과를 통해 경기지역에 이식된 삼국의 고분문화가 더욱 선명해졌고, 고분을 통해 경기지역을 영유하였던 삼국의 지배양상과 사회구조를 구체화하는데 오류를 줄일 수 있을 것이라 기대된다. The Gyeonggi region was an area occupied and contested by all the Three Kingdoms of Silla, Goguryeo, and Baekje, thus the horizontal tombs of the Three Kingdoms coexist. Due to the lack of burial relics and strong structural homogeneity, however, there were considerable errors and difficulties in the identification of the tomb's origins. Therefore, the structural differences of each stone chamber tomb that had room for reconsideration were clarified among the horizontal stone chambers of the Three Kingdoms era in Gyeonggi. After a closer examination of the location and the floor plan, standard dimensions, construction method, and funeral methods of the stone chamber, along with the research findings related to the existing construction sites in previous studies, the difference between the Baekje stone chamber tombs and burial mounds of Goguryeo and Silla was clear, so there was little room for reconsideration. However, in Deokeun-dong in Goyang, Deoksori in Namyangju, Soha-dong No. 3 in Gwangmyeong, Seondong-ri Nos. 5 and 6 in Gwangju, Eobiri in Yongin, Ichiri No. 9 in Icheon, and Nos. Na-7 and 8 in Eumseong's Munchon-ri, many of the stone chambers previously reported as Silla stone chambers were found to have been built in the Goguryeo occupation time. In addition, the tombs in Garak-dong and Bangi-dong, where the controversy over who built them continued, further consolidated their status as Silla stone chamber tombs, except for Garak-dong Nos. 3 and 5. Through the results of studies such as this, cultures of the Three Kingdoms transplanted in the Gyeonggi region has become clearer, and it is expected that errors in estimating the governance pattern and social structure of each of the Three Kingdoms that had occupied the area through the tombs may be minimized.

분자동역학 해석 기반 가교율에 따른 에폭시 폴리머의 항복 표면 형상 평가

김진영,박형범,Jinyoung Kim,Hyungbum Park 한국복합재료학회 2023 Composites research Vol.36 No.5

This study focuses on investigating the influence of epoxy polymer crosslinking density, a crucial aspect in composite material matrices, on the yield surface using molecular dynamics simulations. Our approach involved generating epoxy models with diverse crosslinking densities and subjecting them to both uniaxial and multiaxial deformation simulations, accounting for the elasto-plastic deformation behaviors. Through this, we obtained key mechanical parameters including elastic modulus, yield point, and strain hardening coefficient, all correlated with crosslinking conversion ratios. A particularly noteworthy finding is the rapid expansion of the yield surface in the biaxial compression region with increasing crosslinking ratios, compared to the uniaxial tensile region. This unique behavior led to observable yield surface variations, indicating a significant pressure-dependent relationship of the yield surface considering plastic strain and crosslinking conversion ratio. These results contribute to a deeper understanding of the complex interplay between crosslinking density and plastic mechanical response, especially in the aspect of multiaxial deformation behaviors.

묵시적 가중 예측기법을 이용한 저 메모리 대역폭 인터 예측기 설계

김진영,류광기,Kim, Jinyoung,Ryoo, Kwangki 한국정보통신학회 2012 한국정보통신학회논문지 Vol.16 No.12

본 논문에서는 H.264/AVC 인코더의 성능 향상을 위해 다중 참조 프레임 기법과 묵시적 가중 예측 기법을 이용하고 낮은 외부 메모리 접근율을 위해 이전 참조 프레임 데이터를 재사용하는 인터 예측기 하드웨어 구조를 제안한다. 참조 소프트웨어JM16.0과 비교하여 참조 프레임 접근율이 약 24%만큼 감소하고 참조 영역 메모리가 약 46%만큼 감소하였다. 통합 구조는 Verilog HDL로 설계되고 Magnachip 0.18um공정으로 합성한 결과 게이트 수는 약 2,061k 이고 91Mhz로 동작한다. In this paper, for improving the H.264/AVC hardware performance, we propose an inter predictor hardware design using a multi reference frame selector and an implicit weighted predictor. previous reference frame are reused for Low Memory Bandwidth. The size of the reference memory in the predictor was reduced by about 46% and the external memory access rate was reduced by about 24% compared with the one in the reference software JM16.0. We designed the proposed system with Verilog-HDL and synthesized inter predictor circuit using the Magnachip 0.18um CMOS standard cell library. The synthesis result shows that the gate count is about 2,061k and the design can run at 91MHz.

K-means 알고리즘과 GBR 알고리즘을 이용한 정수장 응집제 투입률 결정 기법

김진영,강복선,정회경,Kim, Jinyoung,Kang, Bokseon,Jung, Hoekyung 한국정보통신학회 2021 한국정보통신학회논문지 Vol.25 No.6

본 논문에서는 인공지능 기반의 빅데이터 분석과 예측을 통하여 정수장의 공정 중 약품투입곤정에서 응집제 투입률을 결정하는 알고리즘을 도출하였다. 또한, 빅데이터 기술 및 인공지능 알고리즘 적용 방법에 대한 분석 및 기존의 학문적, 기술적 자료를 검토하여 유사 분야 적용 사례를 분석 검토하였다. 이를 통한 최적 응집제 투입률 제시를 목표로 운영 근무자의 의사결정 패턴을 입력 변수와 출력변수의 관계 패턴으로 학습한 후 학습된 패턴을 실제 응집제 주입 공정에 적용하여 침전수 탁도가 목표치에 근사한 일정 수준을 유지할 수 있도록 운영이 가능하였다. 데이터 범위 산정과 전처리를 거친 변수를 선정하여 알고리즘 수행을 준비한 후 군집화와 분류 알고리즘을 적용하여 알고리즘 수행과 결과에 대한 피드백을 반복하여 학습을 진행하였다. In this paper, an algorithm for determining the coagulant input rate in the drug-injection tank during the process of the water purification plant was derived through big data analysis and prediction based on artificial intelligence. In addition, analysis of big data technology and AI algorithm application methods and existing academic and technical data were reviewed to analyze and review application cases in similar fields. Through this, the goal was to develop an algorithm for determining the coagulant input rate and to present the optimal input rate through autonomous driving simulator and pilot operation of the coagulant input process. Through this study, the coagulant injection rate, which is an output variable, is determined based on various input variables, and it is developed to simulate the relationship pattern between the input variable and the output variable and apply the learned pattern to the decision-making pattern of water plant operating workers.

지하수위와 세립분 함유량에 따른 지반함몰 메커니즘

김진영,이성열,최창호,강재모,강권수,정효진,홍재철,이재수,백원진,Kim, JinYoung,Lee, SungYeol,Choi, ChangHo,Kang, JaeMo,Kang, KwonSoo,Jeong, HyoJin,Hong, JaeCheol,Lee, JaeSoo,Baek, WonJin 한국농공학회 2017 한국농공학회논문집 Vol.59 No.5

Recently, ground subsidence frequently occurs in downtown area. The major causes of the subsidence on the subsurface were the damages of the water supply and sewer pipelines and excavation works in adjacent areas, etc. Because of these various factors, it is not easy to analyze the tendency of occurrence of ground subsidence. The purpose of this study is to clarify the effect of ground subsidence by the change of the fine particle content and ground water level and to establish the ground subsidence mechanism. In this study, a model soil-box was manufactured to simulate the failure of the old sewer pipe which is one of the causes on ground subsidence. And a model test was conducted to investigate the effects of fine contents and ground water level on the cavity occurrence. From the test results, firstly the higher the ground water level, the faster the primary cavity is formed as the seepage stress increases. As a result, the secondary cavity and the ground subsidence rapidly progress due to the relaxation of the surrounding ground. The total amount of discharged soil was decreased as the fine content increased.

다중열원 히트펌프 난방 성능에 관한 실험적 연구

김진영(Jinyoung Kim),이민우(Minwoo Lee),김용찬(Yongchan Kim) 대한설비공학회 2019 대한설비공학회 학술발표대회논문집 Vol.2019 No.11

Ground-source heat pumps, also called geothermal heat pumps, show better performance in heating mode than air-source heat pumps owing to higher temperature of the ground heat source. However, the ground temperature decreases progressively in an area where heat extrusion from the ground is much larger than injection into the ground. To prevent this problem, another heat source is necessarily involved in the system. In this study, dual source heat pump which uses secondary heat source as well as ground heat source is presented. To analyze the performance of the dual source heat pump, experiments are conducted and the performance is compared with that of the conventional ground-source heat pump. As a result, the dual source heat pump achieves higher heating capacity in the condenser by 13 to 25 %, and lower ground heat usage in the ‘Evaporator I’ by 43 to 83 % than the ground-source heat pump system. In addition, the dual source heat pump achieves 1 to 7 % higher COP than the ground-source heat pump system.

Assertion 재배치를 통한 스마트 컨트랙트의 수수료 최적화

김진영(Jinyoung Kim),김미수(Misoo Kim),이은석(Eunseok Lee) 한국정보과학회 2023 한국정보과학회 학술발표논문집 Vol.2023 No.6

〈報心錄〉의 構造的 特性과 文學的 價値

김진영(Kim Jinyoung) 한국언어문학회 2008 한국언어문학 Vol.65 No.-

This thesis is studied about lineage and construction of Bosimrok(報心錄). First it is examined literature aspect of Bosimrok typically, and then studied about structural characteristic. Finally it is generalized constructual method of Bosimrok, and after valued literature merit. This can be summarized as follows. First it is studied about typically literature aspect of Bosimrok. The origin of Bosimrok is Chunchu(春秋), but specially revealing of biography literature is Cosega(趙世家) in Sagi(史記). On the ground of this story Orphan Cho(趙氏孤兒) is made by Gigunsang in Yuan china, and the original story is included in Dongjuyeolkukgi(東周列國志) in Ming china. Internationally it is transmitted Europe in 18c, and in Japanese it would be a repertory of Gabukki(歌舞伎). In korea it is transmitted a novel as Jomujeon(趙武傳) and Bosimrok, Keumnangisan(錦囊二山), Myeongsasipri(明沙十里). In upper transmission, Chunchu and Sagi is a first type text as having historical events, and Seodongjiran, Rehabilitation cho in Dongjuyeolkukgi and drama work in china, and Jjomujeon in korea is a second type text as increase literary embellishment. Bosimrok, Keumnangisan, Myeongsasipri is third type text as turn sharp change. Second it is studied about structural characteristic of Bosimrok. The work in China has no important person Chosak, the plot is so simple and cause and effect of event is missed. But Bosimrok has that subject person’s good deed is worked as a cause, then he took a good deed. So the plot is like that in beginning and expansion good deed is presented variously, so it is worked ground and cause of event transmission. And in crisis and climax good cause is worked, so subject person could be overcome that crisis. Like this, this work has a structure of cause and effect. Third it is studied about formation method and literary value of Bosimrok. In Bosimrok Yangsechung as Josak didn"t die, and revenged, so whole story making method should be changed. First dislike in china story, with remaking person it is classified good man and bad man clearly. And stressing the causality, every event are ended cause and effect. And with laying stress on meeting, separating family should be meet again in last part altogether. Finally add a soldier story, story making method of hero novel in the last period of cohseon is used.

5G 밀리미터파 시장 전망 및 Use Case

김진영(Jinyoung Kim),송영근(Youngkeun Song) 한국콘텐츠학회 2023 한국콘텐츠학회 종합학술대회 논문집 Vol.2023 No.5