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Jin, Wook,Kim, Gou Young,Park, So Young,Chun, Young Soo,Nam, Deok Ho,Park, Ji Seon,Ryu, Kyung Nam American Roentgen Ray Society, etc.] 2010 American Journal of Roentgenology Vol.195 No.2
<P>The objective of this article is to illustrate the sonographic findings of benign, vascularized superficial soft-tissue tumors.</P>
Jin, Wook,Kim, Gou Young,Park, So Young,Chun, Young Soo,Rhyu, Kee Hyung,Park, Ji Seon,Ryu, Kyung Nam American Roentgen Ray Society, etc.] 2010 American Journal of Roentgenology Vol.195 No.2
<P>The objective of this article is to illustrate the sonographic findings of malignant, vascularized superficial soft-tissue masses and their look-alikes.</P>
Jin, Wook,Ryu, Yong Gu,Kang, Sung Gyun,Kim, Sung Keun,Saito, Natsumi,Ochi, Kozo,Lee, Sang Hee,Lee, Kye Joon Microbiology Society 2004 Microbiology Vol.150 No.5
<P>This study is focused on the involvement of the unusual nucleotide (p)ppGpp during the morphological and physiological differentiation of Streptomyces clavuligerus. In particular, the functional and structural elements of two genes encoding the proteins RelA and Rsh were identified. The relA gene encodes an 843 aa protein (RelA), while the rsh gene encodes a 738 aa protein (Rsh). The relA and rsh genes were disrupted by the insertion of a hygromycin resistance gene and an apramycin resistance gene, respectively. The synthesis of ppGpp in the relA gene-disrupted mutant was completely eliminated under conditions of starvation for amino acids, whereas synthesis persisted, but was greatly reduced in the rsh gene-disrupted mutant. The relA gene-disrupted mutant had a bald appearance on agar plate cultures and retarded growth in submerged culture, while the rsh-disrupted mutant was unchanged in growth characteristics relative to the wild-type culture. The production of both clavulanic acid and cephamycin C were completely abolished in the relA-disrupted mutant. Thus, it is concluded that the relA gene rather than rsh is essential for morphological and physiological differentiation in S. clavuligerus and that RelA primarily governs the stringent response of S. clavuligerus to starvation for amino acids.</P>
Jin, Wook,Ryu, Kyung Nam,Kim, Gou Young,Kim, Hyun Cheol,Lee, Jae Hoon,Park, Ji Seon W.B. Saunders 2008 Journal of ultrasound in medicine Vol.27 No.2
<P>OBJECTIVE: The purpose of this study was to retrospectively evaluate the sonographic findings of ruptured epidermal inclusion cysts in superficial soft tissue, with an emphasis on shapes, pericystic changes, and pericystic vascularity. METHODS: The cases of 61 patients with surgically confirmed epidermal inclusion cysts were reviewed, and 13 patients were found to have ruptured cysts. The Ethics Committees of our institutions did not require patient approval or informed patient consent for this retrospective study. We evaluated the shapes, sizes, locations, pericystic changes, and pericystic vascularity for the 13 cases. RESULTS: The shapes of the ruptured epidermal inclusion cysts were classified into 3 types: with lobulations (type I, 2 cases), with protrusions (type II, 8 cases), and with abscess pocket formations (type III, 3 cases). The mean long diameter of the cysts was 3 cm. Common sites of ruptured epidermal inclusion cysts were the plantar surface of the metatarsophalangeal joint (4 cases) and buttocks (3 cases). Pericystic changes were noted in all of the type II and III cysts. Increased vascularity on color Doppler sonography was prominent in 3 type II cysts and 3 type III cysts. Deep abscess formation was noted in the epidermal inclusion cysts, especially for the type III cysts. CONCLUSIONS: A ruptured epidermal inclusion cyst visualized by sonography had variable shapes; the sonographic findings can be useful for obtaining a correct diagnosis of a ruptured epidermal inclusion cyst.</P>
Jin, Wook,Kim, Hyo Kyung,Kim, Jae Young,Kang, Sung Gyun,Lee, Sang Hee,Lee, Kye Joon Elsevier 2004 Journal of biotechnology Vol.114 No.1
<P><B>Abstract</B></P><P>The effects of growth rate and nutrient uptake rate on the production of cephamycin C were determined in the parental strain, <I>ΔrelA</I> mutant, and <I>Δrsh</I> null mutant of <I>S. clavuligerus</I>. Production of cephamycin C was inversely related to mycelium growth and the phosphate feed rate was more critical for the production of cephmycin C. On the contrary, the production of cephamycin C was completely abolished in the <I>ΔrelA</I> mutant, but not in <I>Δrsh</I> mutant. The changes in the cephamycin C production by disruption of the <I>relA</I> and <I>rsh</I> genes are presumably associated with the consequent ability of the mutants to accumulate (p)ppGpp under nutrient starvation. Therefore, it is concluded that the stringent response of <I>S. clavuligerus</I> to starvation for nutrients is governed mainly by RelA rather than Rsh and that the response is more apparently regulated by the limitation of phosphate.</P>
A 320 mW 342 GOPS Real-Time Dynamic Object Recognition Processor for HD 720p Video Streams
Jinwook Oh,Gyeonghoon Kim,Junyoung Park,Injoon Hong,Seungjin Lee,Joo-Young Kim,Jeong-Ho Woo,Hoi-Jun Yoo IEEE 2013 IEEE journal of solid-state circuits Vol.48 No.1
<P>A heterogeneous multi-core processor is proposed to achieve real-time dynamic object recognition on HD 720p video streams. The context-aware visual attention model is proposed to reduce the required computing power for HD object recognition based on enhanced attention accuracy. In order to realize real-time execution of the proposed algorithm, the processor adopts a 5-stage task-level pipeline that maximizes the utilization of its 31 heterogeneous cores, comprising four simultaneous multithreading feature extraction clusters, a cache-based feature matching processor and a machine learning engine. Dynamic resource management is applied to adaptively tune thread allocation and power management during execution based on the detected amount of tasks and hardware utilization to increase energy efficiency. As a result, the 32 mm<SUP>2</SUP> chip, fabricated in 0.13 μm CMOS technology, achieves 30 frame/sec with 342 8-bit GOPS peak performance and 320 mW average power dissipation, which are a 2.72 times performance improvement and 2.54 times per-pixel energy reduction compared to the previous state-of-the-art.</P>