Weighted Association Rule Mining for Item Groups with Different Properties and Risk Assessment for Networked Systems

KIM, Jungja,CEONG, Heetaek,WON, Yonggwan The Institute of Electronics, Information and Comm 2009 IEICE transactions on information and systems Vol.92 No.1

<P>In market-basket analysis, weighted association rule (WAR) discovery can mine the rules that include more beneficial information by reflecting item importance for special products. In the point-of-sale database, each transaction is composed of items with similar properties, and item weights are pre-defined and fixed by a factor such as the profit. However, when items are divided into more than one group and the item importance must be measured independently for each group, traditional weighted association rule discovery cannot be used. To solve this problem, we propose a new weighted association rule mining methodology. The items should be first divided into subgroups according to their properties, and the item importance, i.e. item weight, is defined or calculated only with the items included in the subgroup. Then, transaction weight is measured by appropriately summing the item weights from each subgroup, and the weighted support is computed as the fraction of the transaction weights that contains the candidate items relative to the weight of all transactions. As an example, our proposed methodology is applied to assess the vulnerability to threats of computer systems that provide networked services. Our algorithm provides both quantitative risk-level values and qualitative risk rules for the security assessment of networked computer systems using WAR discovery. Also, it can be widely used for new applications with many data sets in which the data items are distinctly separated.</P>

Master Plan for Tourist Destination Jeongeupsa, a Ballad Made during Baekje Kingdom Applying Spatial Storytelling System

Jungjae Kim,Kyungjin Lee 전북대학교 휴양및경관계획연구소 2017 휴양및경관연구 (J East Asian Landscape Studies) Vol.11 No.3

The recent trend of local tourism is moving toward the discovery of hidden resources, breaking from the concept of utilizing the existing resources, and of creating various stories based upon discovered resources. Accordingly, this research is about establishing master plans for a tourist destination named Jeongeupsa, a ballad made during Baekje Kingdom, which is a literary resource representing Jeongeup-si. These plans will be established by applying a research process of spatial storytelling. This research contains theoretical consideration through advanced research on spatial storytelling and Jeongeupsa. The spatial storytelling research process that is suggested shall include an analysis of the context of texts, understanding of sense of place, application of a theme and a story, construction of a space, and sharing of a story. The space composition is as follows: First, district of Jeongeupsa based on the story resources of Jeongeupsa, a ballad made during Baekje Kingdom; second, Beakje Jeongchonhyun based on the story resources of the Keunsaeam wells; finally, it was composed of Jeonghae village district through story resources of Jeonghae village. The spatial storytelling system has applied while establishing master plans for the tourist destination in order to turn a tourist destination into a space where visitors can easily be aware of various story resources that a space has and stories and visitors can interact and communicate each other, breaking from the old unified planning system. The purpose of this research is to find a new method of tourist spot planning. I hope the method suggested by this research can be of help to a process of realizing various tourism resources.

Impact of White Matter Lesions on Depression in the Patients with Alzheimer’s Disease

JungJae Lee,EunYoung Lee,SeokBum Lee,JoonHyuk Park,TaeHui Kim,HyunGhang Jeong,JaeHyoung Kim,JiWon Han,KiWoong Kim 대한신경정신의학회 2015 PSYCHIATRY INVESTIGATION Vol.12 No.4

Objective-Comorbid depression is common in patients with Alzheimer’s disease (AD). An increase in white matter lesions (WMLs) has been associated with depression in both elderly individuals with normal cognition and patients with Alzheimer’s disease. We investigated whether the severity and location of WMLs influence the association between WMLs and comorbid depression in AD. Methods-We enrolled 93 AD patients from Seoul National University Bundang Hospital. We administered both the Mini International Neuropsychiatric Inventory (MINI) and the Korean version of the Consortium to Establish a Registry for Alzheimer’s Disease Assessment Packet (CERAD-K) clinical and neuropsychological battery. Subjects also underwent brain magnetic resonance imaging (MRI). We diagnosed AD according to the criteria of the National Institute of Neurological and Communicative Disorders and Stroke and the Alzheimer’s Disease and Related Disorders Association. We diagnosed depressive disorders according to the DSM-IV diagnostic criteria, and evaluated the severity of depressive symptoms using the Korean version of the Geriatric Depression Scale (GDS-K). We quantified the WML volumes from the brain MRI using a fully automated segmentation algorithm. Results-The log of the WML volume in the frontal lobe was significantly associated with depressive disorders (odds ratio=1.905, 95% CI=1.027–3.533, p=0.041), but not with the severity of depressive symptoms as measured by the GDS-K. Conclusion-The WML volume in the frontal lobe conferred a risk of comorbid depressive disorders in AD, which implies that comorbid depression in AD may be attributed to vascular causes.

A Decline Cause Analysis of Korean Tourist Areas Depending on Stage in the Life Cycle

Jungjae Kim,Kyoungjin Lee 전북대학교 휴양및경관계획연구소 2016 휴양및경관연구 (J East Asian Landscape Studies) Vol.10 No.2

Since Taejongdae Resort Park’s designation as the first tourist area in 1969, a total of 230 domestic tourist areas have been designated, constructed, and operated thus far. Forty-seven years after the first tourist area designation, 38.8% of domestic tourist areas are now in a stage of stagnation/decline. As these declining domestic tourist areas only play their role as normal tourist areas during peak season, this study examined the causes of decline in tourist areas in general and of each tourist area in particular, so that the analysis could be used as basic data for the regeneration/revitalization of tourist areas. In order to understand the causes of decline, an index of cause of decline in tourist areas was drawn up. Data were collected based on this index, with tourist areas in the stagnation/decline stage as the target, which was drawn from previous research. Based on the results, factor analysis was conducted on both decline cause and discriminant analysis to understand the causes of decline in each tourist area. The results demonstrate that the diverse uses for tourists, sustainability, and preservation of tourism resources have a huge influence as internal factors, while the external capital investment and competitiveness of tourism resources have a huge influence as external factors. As this study only analyzed the quantitative index in accordance with physical characteristics, it is necessary to conduct additional research based on qualitative indices. In this case, this study could be used as basic data. This study is expected to be applied as basic research to seek solutions for each cause of stagnation/ decline in tourist areas, and also to establish measures to regenerate/revitalize those areas.

Video identification based on common features in a scene segmented by CNN

Kim Jongweon(김종원),Han Sungjun(한성준),Kim Yongbae(김용배),Lee Jungjae(이정재) 한국전시산업융합연구원 2017 한국과학예술융합학회 Vol.31 No.-

Video fingerprinting is an important issue in the copyright protection field as digital environment enables the copyright infringement to get easier and easier. Copyright owners want to identify contents on the net and to block infringed contents. In this paper, we propose an efficient algorithm to identify video contents even if we only have a video frame. The algorithm divides a video content into scenes using deep learning network and then extracts common feature from a scene. We use deep learning with convolution neural network for video scene segmentation. It can be more precise than traditional method that use histogram. The feature database contains only a set of common features per a scene. The proposed algorithm can reduce the size of the database by a factor of a hundred, which can reduce the database comparison time by a factor of a few.

Development of a Nanoprecision 3-DOF Vertical Positioning System With a Flexure Hinge

Hyoyoung Kim,Jungjae Kim,Dahoon Ahn,Daegab Gweon IEEE 2013 IEEE TRANSACTIONS ON NANOTECHNOLOGY Vol.12 No.2

<P>This paper describes the conceptual design of an ultraprecision 3-DOF (Z, Ox, Oy) vertical positioning system with nanometer precision. The vertical out-of-plane positioning system can be used for various nanoalignment applications, such as optical instrument alignment. The proposed vertical positioning system is driven by three piezoelectric (PZT) actuators and is guided by three rotationally symmetric hinges. Because the displacement generated by a PZT actuator is very small, the proposed system also includes an amplification hinge mechanism. Because the relationships between the variables of the hinge parameters and system performance levels are complicated, an optimization procedure to obtain optimal design parameters, which maximize the system bandwidth, is developed. Based on the solution to the optimization problem, the design of a vertical positioning system and finite-element-method simulation results are presented. Finally, the stage is manufactured and tested for verification. The stroke of the translational movement is 190 mm, and the stroke of the rotational movement is 0.5 mrad, whereas their in-position stability levels are ±2 nm and ±20 nrad and resolutions are 5 nm and 80 nrad, respectively. The settling time is less than 45 ms.</P>

아브라함 언약의 신학적 함의와 개혁주의생명신학적 적용 : 창세기 15장과 17장을 중심으로

김정자 ( Jungja Kim ) 개혁주의생명신학회 2021 생명과 말씀 Vol.31 No.3

이 논문의 목적은 창세기에 나타난 아브라함 언약의 신학적 연구를 바탕으로 하여 그것이 개혁주의생명신학에 주는 함의를 보여주는 데 있다. 아브라함 언약은 성서학 연구에서 매우 중요하다고 할 수 있다. 왜냐하면 모세오경과 역사서 그리고 선지서에 이르기까지 계속해서 이스라엘 백성들에게 언급되며 성취와 미래적 약속으로 전개되고 있기 때문이다. 본고에서 필자는 아브라함 언약이 언급된 창세기 15장과 17장에 나타난 언약이 일부 역사비평학자들이 주장하는 것과 같이 전혀 다른 별개의 언약이 아니라 유기적 통일성을 가지고 있다는 것을 고찰하였다. 이를 위해 본문이 학계에서 어떻게 해석되어 왔는지 연구사를 개관하고, 이후 본문의 구조를 분석하며 중심주제가 본문에서 어떻게 작용하고 있는지를 살펴보았다. 창세기 15장과 17장을 이끌고 가는 기본적인 요소에서 후손에 대한 약속, 땅에 대한 약속, 하나님과의 관계에 대한 약속은 두 장에 모두 나타나며 주제적 일관성을 갖는다. 또한 이곳에 나타난 씨에 대한 언급은 아브라함의 자손으로 장차 다윗 왕의 계통을 통해 이땅에 오실 왕적 메시아인 그리스도에게까지 이른다. 아브라함 언약에서 강조하고 있는 것은 언약 당사자의 믿음과 순종이다. 창세기 15장은 아브라함의 믿음이 강조되어 언급되었다. 반면 창세기 17장은 아브라함이 하나님께 온전히 순종해야 함을 강조하고 있다. 이것은 하나님께 대한 믿음과 온전한 순종의 미덕을 보여준다. 따라서 창세기 15장과 17장의 언약이 공고하게 되고 아브라함과 아브라함의 후손 그리고 열방까지 하나님의 복을 받게 된다. 본 연구가 오늘날 개혁주의생명신학에 던지는 메시지는 분명하다. 아브라함 언약 연구는 믿음과 실천적 순종을 중요시하는 개혁주의생명신학이 지향해야 할 방향성을 잘 보여준다. The purpose of this thesis is to show the meaning it gives to the Reformed Life Theology based on the theological research of the Abrahamic covenant in Genesis. The Abrahamic covenant can be said to be very important in biblical research. This is because even the Pentateuch, the historical books, and the prophets continue to be mentioned to the people of Israel and unfold as fulfillment and future promises. In this study, I studied that the covenant in Genesis 15 and 17 mentioned by the Abrahamic covenant has organic unity, unlike some historical critics who claim that it is a completely different covenant. In addition, we outlined the research history on how the text has been interpreted in academia, analyzed the structure of the text, and examined how the central theme is working in the text. In the basic elements of Genesis 15 and 17, the promise of descendants, the promise of the land, and the promise of a relationship with God appear in both chapters and are consistent in subject matter. The reference to the seed here also extends to Christ, the royal Messiah, the descendant of Abraham, who will come through the lineage of King David. The Abrahamic covenant emphasizes the faith and obedience of the covenant parties. On the other hand, Genesis 17 emphasizes that Abraham must obey God completely. This shows the virtue of faith in God and perfect obedience. Therefore, the covenant of Genesis 15 and 17 will become firm, and Abraham, his descendants, and even the nations will receive God's blessings. The implications of this study for today's Reformed Life Theology are clear. The study of the Abrahamic covenant shows the direction that Reformed Life Theology should aim for, which emphasizes faith and practical obedience.

Vibration-insensitive measurements of the thickness profile of large glass panels

Park, Jungjae,Bae, Jaeseok,Jin, Jonghan,Kim, Jong-Ahn,Kim, Jae Wan The Optical Society 2015 Optics express Vol.23 No.26

통학차량에 남겨진 유아 감지 및 경고 시스템 설계

김정재(Jungjae Kim),노태송(Taesong Noh),황중일(Jungil Hwang),김정민(Jeongmin Kim) 한국자동차공학회 2016 한국자동차공학회 학술대회 및 전시회 Vol.2016 No.11

EGR을 이용한 승용디젤엔진의 오일웜업 특성에 관한 연구

한정재(JungJae Han),정충수(ChoongSoo Jeong),김중현(JoongHyun Kim),김태우(TaeWoo Kim),박성진(SungJin Park),정영록(YoungRock Chung),배상수(SangSoo Pae) 한국자동차공학회 2016 한국자동차공학회 부문종합 학술대회 Vol.2016 No.5

During a cold start, engine consumes more fuels compared with in hot operating condition. Because high viscosity of engine oil at low temperature increases mechanical frictions and thermal losses. Therefore, many warm up devices were researched about shortening its heat-up time to reduce mechanical frictions and fuel consumptions for decades. An exhaust gas with high temperature and volumetric flow rate can provide a possibility of high thermal potential to an engine. In this paper, heat exchanger system was consisted of engine oil circuit and heating components installation using EGR. The oil heater stand on CFD and engine numerical optimization applied to real engine test. And it is analyzed the effects of engine oil heater about the warm-up characteristics of engine variables and the fuel consumption in WLTP cycle. The results were compared with analytical modeling and engine bench test results in WLTP cycle.