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Park, Seung-Ik,Noh, Jungrae,Cheong, Hee Jun,Kwon, Sanghoon,Song, Yungoo,Kim, Sung Won,Santosh, M. Elsevier 2019 Geoscience frontiers. Vol.10 No.3
<P><B>Abstract</B></P> <P>During subduction, continental margins experience shortening along with inversion of extensional sedimentary basins. Here we explore a tectonic scenario for the inversion of two-phase extensional basin systems, where the Early−Middle Jurassic intra-arc volcano-sedimentary Oseosan Volcanic Complex was developed on top of the Late Triassic−Early Jurassic post-collisional sequences, namely the Chungnam Basin. The basin shortening was accommodated mostly by contractional faults and related folds. In the basement, regional high-angle reverse faults as well as low-angle thrusts accommodate the overall shortening, and are compatible with those preserved in the cover. This suggests that their spatial and temporal development is strongly dependent on the initial basin geometry and inherited structures. Changes in transport direction observed along the basement-sedimentary cover interface is a characteristic structural feature, reflecting sequential kinematic evolution during basin inversion. Propagation of basement faults also enhanced shortening of the overlying sedimentary cover sequences. We constrain timing of the Late Jurassic−Early Cretaceous (ca. 158−110 Ma) inversion from altered K-feldspar <SUP>40</SUP>Ar/<SUP>39</SUP>Ar ages in stacked thrust sheets and K-Ar illite ages of fault gouges, along with previously reported geochronological data from the area. This “non-magmatic phase” of the Daebo Orogeny is contemporaneous with the timing of magmatic quiescence across the Korean Peninsula. We propose the role of flat/low-angle subduction of the Paleo-Pacific Plate for the development of the “Laramide-style” basement-involved orogenic event along East Asian continental margin.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Structural inversion of Early to Middle Mesozoic two-phase extensional systems during subduction of the Paleo-Pacific Plate. </LI> <LI> Basement-involved contractional deformation in relation to the initial basin geometry and inherited structures. </LI> <LI> Late Jurassic to Early Cretaceous magmatic quiescence reflecting flat/shallow subduction-related orogenic event. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
Park, Sujin,Sunesh, Chozhidakath Damodharan,Kim, Hyunsoo,Chae, Hyunhee,Lee, Jungrae,Choe, Youngson John Wiley Sons, Ltd 2012 Surface and interface analysis Vol.44 No.11
<P>The preparation and electrical properties of ionic transition metal complex light‐emitting electrochemical cells using phenanthroline‐based ancillary ligands in metal complexes have been investigated. Luminous layer was prepared by the synthesis of tetrakis(2‐phenylpyridine‐C,<I>N</I>′)(μ‐dichloro)diiridium and two kinds of phenathroline ancillary ligands and the ion exchange of ammonium hexafluorophosphate. Two devices have been fabricated with structures of ITO/poly(3,4‐ethylenedixythionphene)‐poly(styrenesulfonate)(PEDOT:PSS)/[iridium(2‐phenylpyridine)<SUB>2</SUB>(5‐methyl‐1,10‐phenathroline)]PF<SUB>6</SUB>/Al and ITO/poly(3,4‐ethylenedixythionphene)‐poly(styrenesulfonate) (PEDOT:PSS)/[iridium(2‐phenylpyridine)<SUB>2</SUB>(5,6‐dimethyl‐1,10‐phenathroline)]PF<SUB>6</SUB>/Al. Both devices presented yellow emission color and showed low turn‐on voltage, which were approximately 3 V and high luminance. The device based on ITO/PEDOT:PSS/[iridium(2‐phenylpyridine)<SUB>2</SUB>(5,6‐dimethyl‐1,10‐phenathroline)]PF<SUB>6</SUB>/Al showed higher luminance than the other. Copyright © 2012 John Wiley & Sons, Ltd.</P>
NJ+: An Efficient Congestion Control Mechanism for Wireless Networks
( Jaehyung Lee ),( Jungrae Kim ),( Minu Park ),( Jahwan Koo ),( Hyunseung Choo ) 한국인터넷정보학회 2008 KSII Transactions on Internet and Information Syst Vol.2 No.6
Transmission control protocols have to overcome common problems in wireless networks. TCP employing both packet loss discrimination mechanism and available bandwidth estimation algorithm, known as the good existing solution, shows significant performance enhancement in wireless networks. For instance, TCP New Jersey which exhibits high throughput in wireless networks intends to improve TCP performance by using available bandwidth estimation and congestion warning. Even though it achieves 17% and 85% improvements in terms of goodput over TCP Westwood and TCP Reno, respectively, we further improve it by exploring maximized available bandwidth estimation, handling bit-error-rate error recovery, and effective adjustment of sending rate for retransmission timeout. Hence, we propose TCP NJ+, showing that for up to 5% packet loss rate, it outperforms other TCP variants by 19% to 104% in terms of goodput when the network is in bi-directional background traffic.
( Nguyen Thi Trinh ),( Jungrae Kim ),( Sunghoon Park ) 한국공업화학회 2019 한국공업화학회 연구논문 초록집 Vol.2019 No.0
In the present study, to use glucose as a growth carbon source, Pseudomonas putida was developed as host for 3-HP production. The P. putida C3 which can grow well on glucose was isolated, and 3-HP production pathway was heterologously introduced. To enhance the yield and titer of 3-HP, 3-HP degradation pathway and a putative alcohol dehydrogenase converting 3-hydroxypropionaldehyde to 1,3-propanediol were disrupted. In addition, transcriptional regulator GlpR and glycerol kinase GlpK were removed and 3-HP could be produced at the theoretical yield of 1 mol/mol glycerol. On the flask scale, 65 mM 3-HP was produced in 24 h.
Dynamic Microcontainers as Microvacuums for Collecting Nanomaterials After Clinical Treatments
Choi, Daniel S.,Park, Jungrae,Ke Xu,Kringel, Rose,Choi, John J.,Jeon, In Tak,Young Keun Kim IEEE 2013 IEEE transactions on magnetics Vol.49 No.7
<P>We present a feasible method to collect ferromagnetic nanomaterials(FNMs) after clinical utilization by employing ferromagnetic microcontainers (MCs). The cubic MCs with dimensions of 200 micrometers have gold-coated nickel frames and were tethered such a way that they are able to remove FNMs from cells with the use of an external magnetic field. The study has been conducted in two parts: 1) enhancement of the motion of MCs in glass-based microfluidic channels filled with viscous fluids by magnetically-driven spinning MCs, i.e., “dynamic MCs”; 2)sweeping FNMs from the cells using magnetic attractive forces between FNMs and MCs through a “microvacuum”process. Our study shows that spinning MCs can transport better than nonspinning MCs through viscous fluids. We found that approximately 70% of FNMs internalized with human embryonic cells (HEK-293) were removed from the cells by the spinning MCs. Such in-vitro experiments suggest the possibility of resolving the issue of removing FNMs used for clinical treatments from human body after treatments.</P>
Hopkins, Xiaoping,Gill, Waqas Amin,Kringel, Rosemarie,Wang, Guankui,Hass, Jamie,Acharya, Suresh,Park, Jungrae,Jeon, In Tak,An, Boo Hyun,Lee, Ji Sung,Ryu, Jong Eun,Hill, Rod,McIlroy, David,Kim, Young K IOP 2017 Nanotechnology Vol.28 No.3
<P>We present a novel method of radio frequency (RF)-mediated thermotherapy in tumors by remotely heating nickel (Ni)–gold (Au) core–shell nanowires (CSNWs). Ectopic pancreatic tumors were developed in nude mice to evaluate the thermotherapeutic effects on tumor progression. Tumor ablation was produced by RF-mediated thermotherapy via activation of the paramagnetic properties of the Ni–Au CSNWs. Histopathology demonstrated that heat generated by RF irradiation caused significant cellular death with pyknotic nuclei and nuclear fragmentation dispersed throughout the tumors. These preliminary results suggest that thermotherapy ablation induced via RF activation of nanowires provides a potential alternative therapy for cancer treatment.</P>