http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Performance Analysis of a Toroid-Type HTS SMES Adopted for Frequency Stabilization
A-Rong Kim,Sang-Yong Kim,Kwang-Min Kim,Jin-Geun Kim,Seokho Kim,Minwon Park,In-Keun Yu,Sangjin Lee,Myung-Hwan Sohn,Hae-Jong Kim,Joon-Han Bae,Ki-Chul Seong IEEE 2011 IEEE transactions on applied superconductivity Vol.21 No.3
<P>Superconducting magnetic energy storage (SMES) can overcome fluctuations in frequency because of its fast response time in charging and discharging energy. To stabilize the fluctuations in frequency of wind power generation systems (WPGSs), HTS SMES systems should be connected to the terminal of the WPGSs. Ulleung Island's power network in Korea was modeled with a real-time digital simulator (RTDS) to demonstrate the effectiveness of SMES at stabilizing frequency. A toroid-type HTS SMES cooled by conduction cooling and a DC/DC chopper to charge and discharge current were fabricated for the experiment. The simulation results show the frequency stabilization effected by the HTS SMES system with its operational characteristics such as real time variation in current and temperature.</P>
Kim, Sangjin,Kim, Yeongmo,Kim, Hyojoong The Korean Society of Systematic Zoology 2022 Animal Systematics, Evolution and Diversity Vol.38 No.4
The genus Ephedrus Haliday, 1833 is a large taxon of Aphidiinae, consisting of 48 valid species in the world. This genus is considered to be important as a biological control agency, which includes solitary koinobiont parasitoids on aphids. One of its interesting characteristics is both male and female have 11-segmented antennae. In previous study, this genus was subdivided into three subgenus, Breviephedrus, Ephedrus and Fovephedrus, based on molecular and morphological characters. In this study, one Ephedrus species is firstly recorded from South Korea. Since it has been collected from Geumsan-gun in 2005 and deposited as dried specimen at Naturalis Biodiversity Center in Netherland, we recently confirmed it. Description and illustrations of the E. lacertosus are provided.
SangJin Kim,SeongWoo Nam,WonChul Yang,JinChul Kim,JaeHee Kim,SangSoo Kim 제어로봇시스템학회 2008 제어로봇시스템학회 국제학술대회 논문집 Vol.2008 No.10
Utilities in advanced power markets realized the importance of power value-added services, and they have studied power value-added services and the infrastructure for the services. In Korea, we also know the importance of power value-added services but R&D for the services is not vitalized. As time goes by, the importance of the services will be increased because the services are caused by the change of power market and this change will continue. Because this power value-added service market is the Blue ocean which is undeveloped yet, it has potentialities to penetrate world market which these services are not introduced. In this paper, we will introduce how to develop the value added-service BM(Business Model) and its system for Korea power market through analyzing international power market change, the effect of this change for Korea power market and present state of Korea power value-added service environment.
Kim, Un Jeong,Lee, IL Ha,Bae, Jung Jun,Lee, Sangjin,Han, Gang Hee,Chae, Seung Jin,Gü,neş,, Fethullah,Choi, Jun Hee,Baik, Chan Wook,Kim, Sun Il,Kim, Jong Min,Lee, Young Hee WILEY‐VCH Verlag 2011 ADVANCED MATERIALS Vol.23 No.33
<P>Direct integration of vertically aligned carbon nanotube (VACNTs) patterns on a graphene layer combined with a liquid crystal cell can be utilized as an optical array. The hybrid structures have high transparency and conductivity and, as reported by Sun IL Kim, Jong Min Kim, Young Hee Lee, and co‐workers, clear diffraction patterns are obtained by modulating an external electric field. </P>
Anti-obesity efficacy of nanoemulsion oleoresin capsicum in obese rats fed a high-fat diet
Kim, Joo-Yeon,Lee, Mak-Soon,Jung, Sunyoon,Joo, Hyunjin,Kim, Chong-Tai,Kim, In-Hwan,Seo, Sangjin,Oh, Soojung,Kim, Yangha Dove Medical Press 2014 INTERNATIONAL JOURNAL OF NANOMEDICINE Vol.9 No.-
<P><B>Purpose</B></P><P>This study determined the effects of oleoresin capsicum (OC) and nanoemulsion OC (NOC) on obesity in obese rats fed a high-fat diet.</P><P><B>Methods</B></P><P>The rats were randomly separated into three groups: a high-fat (HF) diet group, HF + OC diet group, and HF + NOC diet group. All groups were fed the diet and water ad libitum for 14 weeks.</P><P><B>Results</B></P><P>NOC reduced the body weight and adipose tissue mass, whereas OC did not. OC and NOC reduced mRNA levels of adipogenic genes, including peroxisome proliferator-activated receptor (<I>PPAR</I>)-γ, sterol regulatory element-binding protein-1c, and fatty acid-binding protein in white adipose tissue. The mRNA levels of genes related to β-oxidation or thermogenesis including <I>PPAR</I>-<I>α</I>, palmitoyltransferase-1α, and uncoupling protein-2 were increased by the OC and NOC relative to the HF group. Both OC and NOC clearly stimulated AMP-activated protein kinase (AMPK) activity. In particular, <I>PPAR</I>-<I>α</I>, palmitoyltransferase-1α, uncoupling protein-2 expression, and AMPK activity were significantly increased in the NOC group compared to in the OC group. NOC decreased glycerol-3-phosphate dehydrogenase activity whereas OC did not.</P><P><B>Conclusion</B></P><P>From these results, NOC could be suggested as a potential anti-obesity agent in obese rats fed a HF diet. The effects of the NOC on obesity were associated with changes of multiple gene expression, activation of AMPK, and inhibition of glycerol-3-phosphate dehydrogenase in white adipose tissue.</P>
Kim, Jinbum,Choi, Seongheum,Park, Taejin,Kim, Jinyong,Kim, Chulsung,Cha, Taeho,Lee, Hyangsook,Lee, Eunha,Won, Jung Yeon,Lee, Hyung-Ik,Hyun, Sangjin,Kim, Sunjung,Shin, Dongsuk,Kim, Yihwan,Kwon, Keewon American Chemical Society 2017 ACS APPLIED MATERIALS & INTERFACES Vol.9 No.1
<P>To synthesize a thermally robust Ni1-xPtxSi film suitable for ultrashallow junctions in advanced metal-oxide-semiconductor field-effect transistors, we used a continuous laser beam to carry out millisecond annealing (MSA) on a preformed Ni-rich silicide film at a-local surface temperature above 1000 degrees C while heating the substrate to initiate a phase transition. The melting and quenching process by this unique high-temperature MSA process formed a Ni1-xPtxSi film with homogeneous Pt distribution across the entire film thickness. After additional substantial thermal treatment up to 800 degrees C, the noble Ni1-xPtxSi film maintained a low-resistive phase without agglomeration and even exhibited interface flattening with the underlying Si substrate.</P>
A resistivity anomaly at 380 K in reproduced LK-99
Sangjin Kim,Kwang-Tak Kim,Jeonghun Kang,Dong-Hyeon Gim,Yoon Han Lee,Kee Hoon Kim 한국초전도저온학회 2023 한국초전도저온공학회논문지 Vol.25 No.4
To confirm the room-temperature superconductivity at ambient pressure as claimed in recent arXiv preprints by Lee et al., we followed the original authors’ systematic solid-state synthesis recipe to reproduce Cu-doped Pb-apatite, known as LK-99. Using X-ray diffraction and Raman spectroscopy, we identified inclusion of various impurities alongside the apatite phase in our sample. While the sample exhibited an overall semiconducting behavior in electrical transport, an intriguing resistivity anomaly at 380 K was observed, possibly originating from a structural phase transition of the Cu2-δS impurity. Based on the transport and magnetization measurements, we conclud that the sample is a non-magnetic semiconductor, with absence of superconductivity.
Kim, Jeonghyo,Tran, Van Tan,Oh, Sangjin,Kim, Chang-Seok,Hong, Jong Chul,Kim, SungIl,Joo, Young-Seon,Mun, Saem,Kim, Myoung-Ho,Jung, Jae-Wan,Lee, Jiyoung,Kang, Yong Seok,Koo, Ja-Won,Lee, Jaebeom American Chemical Society 2018 ACS APPLIED MATERIALS & INTERFACES Vol.10 No.49
<P>Magnetic nanoparticles have had a significant impact on a wide range of advanced applications in the academic and industrial fields. In particular, in nanomedicine, the nanoparticles require specific properties, including hydrophilic behavior, uniform and tunable dimensions, and good magnetic properties, which are still challenging to achieve by industrial-scale synthesis. Here, we report a gram-scale synthesis of hydrophilic magnetic nanoclusters based on a one-pot solvothermal system. Using this approach, we achieved the nanoclusters with controlled size composed of magnetite nanocrystals in close-packed superstructures that exhibited hydrophilicity, superparamagnetism, high magnetization, and colloidal stability. The proposed solvothermal method is found to be highly suitable for synthesizing industrial quantities (gram-per-batch level) of magnetic spheres with unchanged structural and magnetic properties. Furthermore, coating the magnetic spheres with an additional silica layer provided further stability and specific functionalities favorable for biological applications. Using in vitro and in vivo studies, we successfully demonstrated both positive and negative separation and the use of the magnetic nanoclusters as a theragnostic nanoprobe. This scalable synthetic procedure is expected to be highly suitable for widespread use in biomedical, energy storage, photonics, and catalysis fields, among others.</P> [FIG OMISSION]</BR>
Shin, Sangjin,Park, Sae Eun,Kim, Soo Young,Hyun, Min Kyung,Kim, Sun Wook,Kwon, Jin Won,Kim, Yeol,Kim, Won Bae,Na, Dong Gyu,Park, Hyun-Ah,Sheen, Seung Soo,Yi, Ka Hee,Chang, Hang-Seok,Cho, Jung Jin,Chun Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.12
Background: The incidence rate of thyroid cancer has been increasing worldwide in recent years, and it is also the most prevalent cancer when it comes to the number of patients among Korean women. With it, ultrasonographic screening test has also become very common. However, there is still controversy over the performance of this screening test. Therefore, the National Evidence-based Healthcare Collaborating Agency (NECA) organized a Round-table Conference on the issues regarding ultrasonographic screening for thyroid cancer in Korea. The objective of the conference was mainly about delivering worthwhile information reflecting social value for the current situation, which was based on evidence surrounding thyroid cancer screening that relevant experts investigated and agreed on. The significance of this Round-table Conference lies in the fact that we reviewed the current evidence, and we were able to discuss the social value and future direction for ultrasonographic screening in Korea.