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Characteristic analysis of vehicle rollover accidents: Rollover scenarios and prediction/warning
Han, I.,Rho, K. Springer Science + Business Media 2017 International journal of automotive technology Vol.18 No.3
<P>Rollover accidents are relatively more serious than other types of accidents, so it is important that the safety device functions appropriately. For the safety device to work correctly, a rollover criteria system which can predict a rollover is needed. To Figure out the characteristics of rollover, NASS-CDS was used to statistically analyze the seriousness of accident and passenger injuries in various rollover situations. Typical scenarios for each rollover type were established by referring to the test criteria of NHTSA. Rollovers can be largely categorized into tripped or un-tripped rollover depending on the situation, but there is no method for estimating the velocity of the car in each situation. This paper suggests methods for estimating the car velocity through finding the relationship between car velocity and quarter turns by performing repetitive simulation in established typical scenarios. Additionally, simple physical models for rollover were developed and each model was analyzed to find the rollover criteria for each type. The rollover criteria were verified by simulating various rollover situations. The rollover criteria suggested would be helpful in predicting a rollover and appropriately activating the safety device.</P>
Car speed estimation based on cross-ratio using video data of car-mounted camera (black box)
Elsevier Sequoia 2016 Forensic science international Vol.269 No.-
<P>This paper proposes several methods for using footages of car-mounted camera (car black box) to estimate the speed of the car with the camera, or the speed of other cars. This enables estimating car velocities directly from recorded footages without the need of specific physical locations of cars shown in the recorded material. To achieve this, this study collected 96 cases of black box footages and classified them for analysis based on various factors such as travel circumstances and directions. With these data, several case studies relating to speed estimation of camera-mounted car and other cars in recorded footage while the camera-mounted car is stationary, or moving, have been conducted. Additionally, a rough method for estimating the speed of other cars moving through a curvilinear path and its analysis results are described, for practical uses. Speed estimations made using cross-ratio were compared with the results of the traditional footage-analysis method and GPS calculation results for camera-mounted cars, proving its applicability. (C) 2016 Elsevier Ireland Ltd. All rights reserved.</P>
Han, I.,Lee, T.K.,Han, J.,Doan, T.V.,Kim, S.B.,Park, J. Elsevier Scientific Pub. Co 2012 Journal of hazardous materials Vol.227 No.-
High-throughput 16S rRNA gene-targeted pyrosequencing was used with commonly used risk assessment techniques to evaluate the potential microbial risk in soil after inoculating genetically modified (GM) Corynebacterium glutamicum. To verify the risk, reference experiments were conducted in parallel using well-defined and frequently used GM Escherichia coli and wild-type strains. The viable cell count showed that the number of GM bacteria in the soil was reduced to below the detection limit within 10 days, while the molecular indicator for GM plasmids was detected throughout the experiment by using quantitative real-time polymerase chain reactions. Subsequent pyrosequencing showed an insignificant influence of the GM bacteria and/or their GM plasmids on the structure of the soil bacterial community this was similar to non-GM wild-type strains. However, pyrosequencing combined with kanamycin-resistant bacteria selection uncovered a potential risk of GM bacteria on the soil bacterial community and pathogens. The results of the improved methodology showed that the microbial risk attributable to GM C. glutamicum was relatively lower than that attributable to the reference GM E. coli.
Treatment of Ednometrial Carcinoma Stage II
Han I.,Kanellitsas C.,Kumar N.,Amendola B.,Morley G. The Korean Society for Radiation Oncology 1984 Radiation Oncology Journal Vol.2 No.2
Between January 1971 and December 1580 fifteen patients diagnosed of adenocarcinoma of the endometrium, stage II seen and treated at the University of Michigan Hospitals. are reviewed. Ten patients were treated with radiation therapy alone. five received hysterectomy after radiation. The five year survival of the patients receiving radiation and surgery was $100\%$ although one of them died after 62 month aster treatment. Of those receiving radiotherapy alone two died at i and 24months after therapy. All of the patients died of distant metastasis. Radiation cystitis was observed among surgically treated patients. while proctitis was observed in 3 cases receiving radiation alone. Though the number of cases reported is small due to rarity of the disease. it appears that radiation alone could provide reasonable tumor control. Also it appears that preoperative irradiation might lead to a longer survival. One patient who survived 62 months had para-aortic node involvement.
Fabrication of Microfluidic Chip for Investigation of Wound Healing Processes
Hani Go,Tian Tian,이석우 한국바이오칩학회 2018 BioChip Journal Vol.12 No.2
This work describes a microfludic cell culture device embedded with microstructured posts fabricated by a photolithography technique and a replica- molding technique. BALB/3T3 fibroblast cells were cultured inside the PDMS microfludic chip to form a confluent state, and an external pressure was applied to the top part of the microfluidic chip to remove the cells from the contact areas of the posts. The applied pressure was removed after the formation of wound areas in the cell layer, and the wound healing processes were investigated by monitoring the migration and proliferation of BALB/3T3 fibroblast cells. The function of the microfluidic chip actuated by an applied pressure was investigated by a fluorescent material, and the formation of the wound areas by an applied pressure was investigated by optical microscopy. After the formation of the wound in the cell layer, optical microscopic images of the cells at the same positions were captured by an optical microscope at intervals of 12 h in order to monitor the wound healing processes by migration and proliferation of the cells. Finally, the wound healing was quantitatively assessed by plotting a growth curve. In conclusion, because the microfluidic device developed in this work is very simple and easy to use, the device might be applicable to assessing the wound healing processes and monitoring the migration and proliferation of other cells.
Hanie Ahmadi,Reza Ghamsarizade,VAHID HADDADI-ASL,Hossein Eivaz Mohammadloo,Bahram Ramezanzadeh 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.116 No.-
To overcome the magnesium’s high corrosion rate issue, triple polyvinylalcohol (PVA) coatings containinghydroxyapatite (HA) and 8-hydroxyquinoline (8-HQ) were prepared by two different methods of electrospinningand immersion. The formation of HA and Mg(8-HQ)2 layers during exposure to a corrosive mediumwas indicated by X-ray diffraction (XRD) and fluorescent images, respectively. Results showed thatthe electrospinning coating containing HA and 8-HQ, revealed a significant anti-corrosion performance(Rct = 7891, and 12,680 ohm cm2 in NaCl 3.5 wt.%, and simulated body fluid (SBF), respectively) comparedto the same composition immersion samples (Rct = 3231, and 3727 ohm cm2). The increment in anticorrosionperformance is caused by the release of HA and 8-HQ from the nanofibers. The problem of bacterialinfections in magnesium implants has been improved (reduction in bacterial-growth percentage= 90% in coating prepared by electrospinning method) by cleverly designing the triple coatingcontaining 8-HQ as an anti-bacterial compound.
On weakly $S$-prime submodules
Hani A. Khashan,Ece Yetkin Celikel 대한수학회 2022 대한수학회보 Vol.59 No.6
Let $R$ be a commutative ring with a non-zero identity, $S$ be a multiplicatively closed subset of $R$ and $M$ be a unital $R$-module. In this paper, we define a submodule $N$ of $M$ with $(N:_{R}M)\cap S=\emptyset$ to be weakly $S$-prime if there exists $s\in S$ such that whenever $a\in R$ and $m\in M$ with $0\neq am\in N$, then either $sa\in(N:_{R}M)$ or $sm\in N$. Many properties, examples and characterizations of weakly $S$-prime submodules are introduced, especially in multiplication modules. Moreover, we investigate the behavior of this structure under module homomorphisms, localizations, quotient modules, cartesian product and idealizations. Finally, we define two kinds of submodules of the amalgamation module along an ideal and investigate conditions under which they are weakly $S$-prime.