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New Encoding Method for Low Power Sequential Access ROMs
Cho, Seong-Ik,Jung, Ki-Sang,Kim, Sung-Mi,You, Namhee,Lee, Jong-Yeol The Institute of Electronics and Information Engin 2013 Journal of semiconductor technology and science Vol.13 No.5
This paper propose a new ROM data encoding method that takes into account of a sequential access pattern to reduce the power consumption in ROMs used in applications such as FIR filters that access the ROM sequentially. In the proposed encoding method, the number of 1's, of which the increment leads to the increase of the power consumption, is reduced by applying an exclusive-or (XOR) operation to a bit pair composed of two consecutive bits in a bit line. The encoded data can be decoded by using XOR gates and D flip-flops, which are usually used in digital systems for synchronization and glitch suppression. By applying the proposed encoding method to coefficient ROMs of FIR filters designed by using various design methods, we can achieve average reduction of 43.7% over the unencoded original data in the power consumption, which is larger reduction than those achieved by previous methods.
New Encoding Method for Low Power Sequential Access ROMs
Seong-Ik Cho,Ki-Sang Jung,Sung-mi Kim,Namhee You,Jong-Yeol Lee 대한전자공학회 2013 Journal of semiconductor technology and science Vol.13 No.5
This paper propose a new ROM data encoding method that takes into account of a sequential access pattern to reduce the power consumption in ROMs used in applications such as FIR filters that access the ROM sequentially. In the proposed encoding method, the number of 1’s, of which the increment leads to the increase of the power consumption, is reduced by applying an exclusive-or (XOR) operation to a bit pair composed of two consecutive bits in a bit line. The encoded data can be decoded by using XOR gates and D flip-flops, which are usually used in digital systems for synchronization and glitch suppression. By applying the proposed encoding method to coefficient ROMs of FIR filters designed by using various design methods, we can achieve average reduction of 43.7% over the unencoded original data in the power consumption, which is larger reduction than those achieved by previous methods.
The Role of News Media Literacy in Predicting News Personalization and News Engagement
Asraful Alam,Namhee Cho,Kyun Soo Kim 이화여자대학교 이화사회과학원 2018 사회과학연구논총 Vol.34 No.1
This study underscores the implication of news media literacy (NML) on news personalization and news engagement in online environment. Borrowing Mihailidis’s model of media literacy in the context of news media, it examines how different components of NML predict individual’s news curation, news selection preferences, and their news engagement. Data was collected from a total of 601 respondents using an internet based nationwide survey in South Korea. Results show that news consumers’ perceived ability of appreciation and their self-perceived media literacy (SPML) have strong relation with news curation, and news selection via algorithmic, journalistic, friends’ recommendation and amateur. On top of this, perceived importance of ubiquitous accessibility to news media and the SPML are positively associated with news engagement. However, people who embraced with critical understanding (e.g., awareness) of news media are more likely to control their news engagement in digital media platform. The findings will add a new insight considering the potential role of NML into the implication of future news engagement.
Human cytomegalovirus induces and exploits Roquin to counteract the IRF1-mediated antiviral state
Song, Jaewon,Lee, Sanghyun,Cho, Dong-Yeon,Lee, Sungwon,Kim, Hyewon,Yu, Namhee,Lee, Sanghyuk,Ahn, Kwangseog National Academy of Sciences 2019 PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF Vol.116 No.37
<P><B>Significance</B></P><P>Human cytomegalovirus (HCMV) is a major cause of birth defects and diseases in immune-compromised patients. HCMV is able to infect and establish latency in large populations by employing multiple strategies to evading the host immune response. Here, we report that HCMV suppresses cytokine-mediated antiviral responses by increasing the expression of cellular RNA-binding protein, Roquin. We show that Roquin inhibits cytokine production by directly binding to cytokine mRNAs and by repressing the expression of their transcription activator. This study highlights that cellular RNA metabolism, which is controlled by HCMV for immune evasion, can be the target for developing anti-HCMV therapeutics.</P><P>RNA represents a pivotal component of host–pathogen interactions. Human cytomegalovirus (HCMV) infection causes extensive alteration in host RNA metabolism, but the functional relationship between the virus and cellular RNA processing remains largely unknown. Through loss-of-function screening, we show that HCMV requires multiple RNA-processing machineries for efficient viral lytic production. In particular, the cellular RNA-binding protein Roquin, whose expression is actively stimulated by HCMV, plays an essential role in inhibiting the innate immune response. Transcriptome profiling revealed Roquin-dependent global down-regulation of proinflammatory cytokines and antiviral genes in HCMV-infected cells. Furthermore, using cross-linking immunoprecipitation (CLIP)-sequencing (seq), we identified IFN regulatory factor 1 (<I>IRF1</I>), a master transcriptional activator of immune responses, as a Roquin target gene. Roquin reduces IRF1 expression by directly binding to its mRNA, thereby enabling suppression of a variety of antiviral genes. This study demonstrates how HCMV exploits host RNA-binding protein to prevent a cellular antiviral response and offers mechanistic insight into the potential development of CMV therapeutics.</P>
Current Status, Challenges, Policies, and Bioethics of Biobanks
Kang, Byunghak,Park, Jaesun,Cho, Sangyun,Lee, Meehee,Kim, Namhee,Min, Haesook,Lee, Sooyoun,Park, Ok,Han, Bokghee Korea Genome Organization 2013 Genomics & informatics Vol.11 No.4
Many biobanks were established as biorepositories for biomedical research, and a number of biobanks were founded in the 1990s. The main aim of the biobank is to store and to maintain biomaterials for studying chronic disease, identifying risk factors of specific diseases, and applying personalized drug therapies. This report provides a review of biobanks, including Korean biobanks and an analysis of sample volumes, regulations, policies, and ethical issues of the biobank. Until now, the top 6 countries according to the number of large-scale biobanks are the United Kingdom, United States, Sweden, France, the Netherlands, and Italy, and there is one major National Biobank of Korea (NBK) and 17 regional biobanks in Korea. Many countries have regulations and guidelines for the biobanks, and the importance of good management of biobanks is increasing. Meanwhile, according to a first survey of 456 biobank managers in the United States, biobankers are concerned with the underuse of the samples in their repositories, which need to be advertised for researchers. Korea Biobank Network (KBN) project phase II (2013-2015) was also planned for the promotion to use biospecimens in the KBN. The KBN is continuously introducing for researchers to use biospecimens in the biobank. An accreditation process can also be introduced for biobanks to harmonize collections and encourage use of biospecimens in the biobanks. KBN is preparing an on-line application system for the distribution of biospecimens and a biobank accreditation program and is trying to harmonize the biobanks.
Growth of SnO2 nanowires by thermal evaporation on Au-coated Si substrates
박성훈,홍찬석,Jungwoo Kang,Namhee Cho,이종무 한국물리학회 2009 Current Applied Physics Vol.9 No.3
Tin oxide (SnO2) nanowires have been grown on Au-coated Si substrates via a conventional thermal evaporation route using Sn powder. X-ray diffraction (XRD), field-emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), and photoluminescence (PL) spectroscopy analyses have been performed to investigate the structure and PL properties of the products. The as-synthesized nanostructures have been found to have monocrystalline tetragonal rutile structure. The diameters and the lengths of the SnO2 nanowires are in ranges of 50–550 nm and 200–500 lm, respectively. The PL spectrum of the as-grown SnO2 nanowires exhibited a broad emission band centered at around 595 nm and with a shoulder at around 555 nm in the yellow region. The growth mechanism of SnO2 nanowires by thermal evaporation have also been discussed.
윤복자,박영순,박남희,조명은,신영숙,유옥순 연세대학교 생활과학연구소 1999 生活科學論集 Vol.13 No.-
This is part of a five-year study supported by the Hanssem Kitchen Manufacturing Company, Which has investigated the possession of kitchen appliances by Seoul residents. In the previous study, there were significant differences in the ownership of kitchen appliances among different socioeconomic classes, age of family, housing size, and housing type. Often kitchen appliances and equipment were not efficiently used due to inappropriate storage. The purpose of this study, therefore, is to suggest an efficient kitchen storage plan, for four selected cases, using for the types and number of applianced shown in the previous study. Kitchens were selected according to housing size, using data from the fourth kitchen remodeling study. Selected cases of kitchen storage plans were as rollows: 290ft^2 (8pyung) one-room apartment, 640ft^2 (18pyung) small apartment, 1138ft^2 (32pyung) medium-sized apartment, and 1779ft^2 (50pyung) single detached house. The suggested kitchen storage plans of this study would enable the efficient storage and use of appliances in each case. This study can be utilized as a reference to consumers who want to have an efficient kitchen storage and to students who need to know how to approach a design problem and apply it to CAD.