Case Study on Message Races in Data Distribution Service Programs

Hyun-Ji Kim,Ok-Kyoon Ha,Yong-Kee Jun,Hee-Dong Park 보안공학연구지원센터 2016 International Journal of Software Engineering and Vol.10 No.3

Data Distribution Service (DDS) is a dependable communication middleware architecture to provide real-time interoperable data exchanges for airborne software. It is important to efficiently detect message races for debugging DDS programs, because it is the most serious type of software faults. Because message races in DDS cause unpredictable results, they must be detected for debugging. However, there has been no report yet on the existence and its confirmation of unintended message races in DDS programs. This paper empirically presents fault cases how it lead to message races on the different order of events. In order to prove it, we show four cases of message races considering the order of two write events and the quality of service (QoS), which lead to nondeterministic results.

Approximate estimation of soil moisture from NDVI and Land Surface Temperature over Andong region, Korea

( Hyun Ji Kim ),( Jae Hyun Ryu ),( Min Ji Seo ),( Chang Suk Lee ),( Kyung Soo Han ) 대한원격탐사학회 2014 大韓遠隔探査學會誌 Vol.30 No.3

Soil moisture is an essential satellite-driven variable for understanding hydrologic, pedologic and geomorphic processes. The European Space Agency (ESA) has endorsed soil moisture as one of Climate Change Initiates (CCI) and had merged multi-satellites over 30 years. The 0.25°coarse resolution soil moisture satellite data showed correlations with variables of a water stress index, Temperature-Vegetation Dryness Index (TVDI), from a stepwise regression analysis. The ancillary data from TVDI, Land Surface Temperature (LST) and Normalized Difference Vegetation Index (NDVI) from MODIS were inputted to a multi-regression analysis for estimating the surface soil moisture. The estimated soil moisture was validated with in-situ soil moisture data from April, 2012 to March, 2013 at Andong observation sites in South Korea. The soil moisture estimated using satellite-based LST and NDVI showed a good agreement with the observed ground data that this approach is plausible to define spatial distribution of surface soil moisture.

Paclitaxel inhibits the hyper-activation of spleen cells by lipopolysaccharide and induces cell death

Hyun-Ji Kim,주홍구 대한수의학회 2016 Journal of Veterinary Science Vol.17 No.4

Paclitaxel was isolated from the bark of the Pacific yew, Taxus brevifolia, and used as an anticancer agent. Paclitaxel prevents cancer celldivision by inhibiting spindle fiber function, inducing cell death. A recent study demonstrated that paclitaxel binds to myeloid differentiationprotein-2 of Toll-like receptor 4 and prevents the signal transduction of lipopolysaccharide (LPS). Paclitaxel converts immune cellshypo-responsive to LPS. In this study, we investigated whether paclitaxel can inhibit the phenotype and function of immune cells. Toaccomplish this, we used spleen cells, a major type of immune cell, LPS, a representative inflammatory agent and a mitogen for B lymphocytes. LPS profoundly increased the activation and cytokine production of spleen cells. However, paclitaxel significantly inhibited LPS-inducedhyper-activation of spleen cells. Furthermore, we found that paclitaxel induced cell death of LPS-treated spleen cells. These results suggestthat paclitaxel can inhibit the hyper-immune response of LPS in spleen cells via a variety of mechanisms. These findings suggest that paclitaxelcan be used as a modulating agent for diseases induced by hyper-activation of B lymphocytes. Taken together, these results demonstrate thatpaclitaxel inhibits the function of spleen cells activated by LPS, and further induces cell death.

Vehicle routing and scheduling problem with additional production or relocation to handle urgent order in pharmaceutical cold chain

Hyun Ji Kim,Byung Soo Kim 대한산업공학회 2023 대한산업공학회 춘계학술대회논문집 Vol.2023 No.5

A Study on Brand Image Analysis of Gaming Business Corporation using KoBERT and Twitter Data

Hyunji Kim 한국게임학회 2021 한국게임학회 논문지 Vol.21 No.6

브랜드 이미지는 고객, 이해관계자, 시장 전체가 해당 브랜드를 어떻게 보고 인지하는지를 뜻한다. 긍정적 브랜드 이미지는 계속적인 구매를 유발하지만, 부정적인 브랜드 이미지는 구매를 중단하게 만드는 등 소비자의 구매행동에 직결되기 때문에, 기업 입장에서는 빠르고 정확히 파악할 필요가 있다. 현재 브랜드 이미지를 조사하는 방법으로는 설문조사, SNS조사 등이 있는데, 표본의 수가 한정되고 시간과 비용이 많이 소요된다는 이슈가 있다. 따라서 본 연구에서는 딥러닝 기반의 KoBERT 모델을 활용하여 소셜미디어 상의 텍스트 데이터에 대한 감성분석을 실시한 후, 이를 브랜드 이미지 분석에 활용하는 방법을 제시하고, 이에 대한 성능을 검증하였다. 결과적으로, 다섯 개의 브랜드 이미지 순위를 매긴 결과가 한국기업평판연구소의 순위와 일치함으로써 본 연구의 사용성을 입증하였다. Brand image refers to how customers, stakeholders and the market see and recognize the brand. A positive brand image leads to continuous purchases, but a negative brand image is directly linked to consumers" buying behavior, such as stopping purchases, so from the corporate perspective, it needs to be quickly and accurately identified. Currently, methods of investigating brand images include surveys and SNS surveys, which have limited number of samples and are time-consuming and costly. Therefore, in this study, we are going to conduct an emotional analysis of text data on social media by utilizing the machine learning based KoBERT model, and then suggest how to use it for game corporate brand image analysis and verify its performance. The result has proved some degree of usability showing the same ranking within five brands when compared with the BRI Korea’s brand reputation ranking.

Evaluation of an Amniotic Membrane-Collagen Dermal Substitute in the Management of Full-Thickness Skin Defects in a Pig

Hyunji Kim,권선영,최태현,Samhyun Jung,Sun Young Kwon,Junhyung Kim,Kihwan Han 대한성형외과학회 2013 Archives of Plastic Surgery Vol.40 No.1

Background - To minimize the inflammatory reaction and improve healing, a new modified dermal substitute composed of an atelocollagen, chondroitin-6-sulfate, and amniotic membrane (AM) was applied to full-thickness skin defects in a pig. Atelocollagen was extracted from bovine skin, and two modified dermal substitutes were generated according to the cross-linking type. Methods - The AM-collagen dermal substitutes were characterized and compared with currently used dermal substitutes in a pig skin defect model. There were five experimental groups: dehydrothermal (DHT) cross-linking atelocollagen with the AM on the top (AM-DHT), DHT and chemical cross-linking atelocollagen with the AM on the top (AM-DHT/chemical), Terudermis, Integra, and AlloDerm. After 3×3 cm full-thickness skin defects on the back of a pig were created, each dermal substitutes dermal substitutes was randomly grafted on the defects. Two weeks after grafting, autologous partial-thickness skin was over-grafted on the neodermis. The take rate of the dermal substitutes, skin, and histological sections were all assessed at 1, 2, and 4 weeks postoperatively. Results - More rapid healing and a higher take rate were evident in the AM-DHT and Terudermis groups. Histological examination revealed fewer inflammatory cells and more fibroblast hyperplasia in these two groups. Four weeks after surgery, the amount of newly formed collagen was significantly more appropriate in the AM-DHT group. * Conclusions - These observations provide supporting evidence that a newly developed amniotic-collagen dermal substitute may inhibit inflammatory reactions and promote wound healing.

Constituents of PG201 (Layla), a multi-component phytopharmaceutical, with inhibitory activity on LPS-induced nitric oxide and prostaglandin E2 productions in macrophages

Hyun Ji Kim,Hye Mi Kim,Byeol Ryu,Woo-Seok Lee,신지선,Kyung-Tae LEE,Dae Sik Jang 대한약학회 2016 Archives of Pharmacal Research Vol.39 No.2

Fourteen compounds, coumarin (1), demethylsuberosin (2), xanthotoxin (3), psoralen (4), decursinol (5), decursin (6), decursinol angelate (7), chikusetsusaponin IVa (8), chikusetsusaponin IVa methyl ester (9), ethyl caffeate (10), syringaresinol (11), cnidilide (12), farnesol (13), and linoleic acid (14), were isolated from phytopharmaceutical PG201 (Layla) by activity-guided fractionation utilizing inhibitory activity on nitric oxide (NO) production in vitro. The isolates 1–14 were evaluated for their inhibitory activity on LPS-induced NO and prostaglandin E2 (PGE2) productions in RAW 264.7 cells. All the compounds except 14 displayed suppressive effects on LPS-induced NO and PGE2 production with IC50 values ranging from 8 to 60 lM. Among these, compound 10 showed the most potent inhibitory effect on NO production from RAW 264.7 cells with an IC50 value of 8.25 lM. Compounds 2, 9, and 10 exhibited high inhibitory effects on PGE2 production with the IC50 values of 9.42, 7.51, and 6.49 lM, respectively. These findings suggest that compounds 2, 9, and 10 are the potential anti-inflammatory active constituents of PG201 and further study may be needed to explain their mechanism of action.

A Survey and Analysis on the Current Status of the Mobile Applications for Garden Design

Hyun Ji Kim,Kyoung Youn Lee,Yu Jin Song,Yi Seul Joo,Kyung Mee Lee 인간식물환경학회 2019 인간식물환경학회지 Vol.22 No.1

This study aimed to examine the current status of mobile applications for garden design and extract valuable contents for the development of garden design programs for future reference. Mobile applications released in Korean or English on Google Play App Market as of July, 2018 were analyzed in this study (1 application in Korea and 14 applications overseas). The purposes of this study are to analyze the components of the programs for those who actually intend to create a garden and to use it as a resource for developing mobile applications for garden design. Thus, program components and contents were analyzed for garden design applications based on real space (1 application in Korea and 3 applications overseas) that could actually help users. The analysis of mobile applications for garden design shows that while overseas garden programs are rapidly developing in various fields, the number of garden design mobile applications developed in Korea and the amount of information platforms are significantly insufficient. This study suggested flowchart for garden design mobile applications based on the analysis results of existing garden design application. This flowchart includes a series of processes from planning/designing gardens to purchasing plants and facilities to constructing/maintaining gardens for users who intend to design and create a real garden. Furthermore, this study proposed a freemium business model based on 4R(Reflex, Reality, Real place, Real communication) marketing strategies for mobile applications. Realistic experiences can be increased through graphics and information about gardens and plants provided in this study, and location-based information services as well as the creation of systems connected with vendors and suppliers of products related to gardens can induce consumers’ purchasing behaviors. Additionally PR activities through various garden-related cultural events are expected to attract more users.

A Simple and Sensitive High Performance Liquid Chromatography-Electrospray Ionization/Mass Spectrometry Method for the Quantification of Ethyl Pyruvate in Rat Plasma

Hyun-Ji Kim,Seung-Woo Kim,이자경,윤성화 대한화학회 2011 Bulletin of the Korean Chemical Society Vol.32 No.4

Ethyl pyruvate (EP) is known as a scavenger of reactive oxygen species (ROS) in the body through its role in the donation of diketone groups to metals to form an EP-metal complex. In order to develop a method for the quantification of EP in biological media, a sensitive and specific, high-performance liquid chromatographyelectrospray ionization-mass spectrometry (HPLC-ESI/MS) method is used to determine the EP-alkali metal ion binding species. The analyte was separated on a ZORBOX SB-C8 (3.5 μm, 30 mm × 2.1 mm I.D.) column and analyzed in selected ion monitoring (SIM) mode with a positive ESI interface using the m/z 255 [2M +Na]^+ ion. The method was validated over the concentration range of 0.5-60.0 μg/mL under 1/9 (v/v) of acetonitrile/methanol solvent system with flow rate 0.05 mL/min. The limit of quantification (LOQ) was 0.5μg/mL.

p-Coumaroyl Anthocyanins from the Tuber Epidermis of a Colored Potato Solanum tuberosum L. cv Jayoung

Hyun Ji Kim,김혜미,Kyoung-Goo Lee,신지선,Hyo-Jin Ahn,Jin Cheol Jeong,Oh-Keun Kwon,Jung-Hwan Nam,이경태,장대식 대한화학회 2014 Bulletin of the Korean Chemical Society Vol.35 No.8