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Kim, Sang-Tae,Lee, Seung-Yeon,Kim, Seung-Chul,Byun, Hye-Won,Lee, Sang-Tae,Kim, Mu-Yeal,Hong, Seok-Pyo,Chung, Young-Jae,Park, Ki-Ryong,Lee, Chung-Hee,Lee, Joong-Ku,Heo, Kyeong-In,Lee, Ji-Ye,Lee, Eun-Je National Science Museum of Korea 2011 Journal of Korean nature Vol.4 No.3
We developed the educational purpose mobile application, named "Wild Flowers of Bukhansan National Park (version 1.0)", aiming for easy identification of wild flowers for students and visitors in the park. When visitors find a flower or part of plant in the park, visitors can search for its name utilizing the pictures and characters provided in their own smartphone mobile devices or tablet PCs. The application provides pictures of wild flowers in the park and character-based searching system based on 12 diagnostic features (e.g., growth form, leaf arrangement, flower symmetry, petal color, petal number, sepal number, etc). We adopted the complete floristic survey of Chung and Lee (1962) and added species that we confirmed their distribution in the park during the development of this application. In summary, number of vascular plants in this park was estimated to be 428 taxa including 100 families, 280 genera, 327 species, 1 subspecies, 50 varieties, and 5 formas. We provided a total of 588 pictures representing 358 taxa and each taxon includes multiple pictures in many cases. Included identification quizzes can be an efficient educational tool as well as fun activity for students and visitors who are learning plant species in Korea. Our next step will include GPS function in the application for indicating visitor's location and for providing previously reported sites of the species that we interested in the map of the park. The future application which includes GPS function will be a valuable tool for the monitoring of rare plants, plant researches related to the climate changes, etc. We currently provide Korean iPhone version only, and English version and both of android versions will be serviced soon.
( Joong Won Park ),( Sun Young Park ),( Ah Rha Wang ),( Min Jee Kim ),( Hae Chul Park1 ),( Iksoo Kim ) 한국잠사학회 2011 International Journal of Industrial Entomology Vol.23 No.1
The leaf beetle, Chrysolina aurichalcea (Coleoptera: Chysomelidae), is a pest damaging plants of Compositae. In order to understand the genetic diversity and geographic variation we sequenced a portion of mitochondrial COI gene (658 bp) and complete nuclear internal transcribed spacer 2 (ITS2) of the species collected from seven Korean localities. A total of 17 haplotypes (CACOI01~CACOI17), with the maximum sequence divergence of 3.04% (20 bp) were obtained from COI gene sequence, whereas 16 sequence types (ITS2CA01~ITS2CA16), with the maximum sequence divergence of 2.013% (9 bp) were obtained from ITS2, indicating substantially larger sequence divergence in COI gene sequence. Phylogenetically, the COI gene provided two haplotype groups with a high nodal support (≥87%), whereas ITS2 provided only one sequence type group with a high nodal support (≥92%). The result of COI gene sequence may suggest the presence of historical biogeographic barriers that bolstered genetic subdivision in the species. Different grouping pattern between COI gene and ITS2 sequences were interpreted in terms of recent dispersal, reflected in the ITS2 sequence. Finding of unique haplotypes and sequence types only from Beakryeng-Islet population was interpreted as an intact remnant of ancient polymorphism. As more samples are analyzed using further hyper-variable marker, further fruitful inference on the geographic contour of the species might be available.
Park, Joong-Won,Park, Sun-Young,Wang, Ah-Rha,Kim, Min-Jee,Park, Hae-Chul,Kim, Ik-Soo Korean Society of Sericultural Science 2011 International Journal of Industrial Entomology Vol.23 No.1
The leaf beetle, $Chrysolina$ $aurichalcea$ (Coleoptera: Chysomelidae), is a pest damaging plants of Compositae. In order to understand the genetic diversity and geographic variation we sequenced a portion of mitochondrial COI gene (658 bp) and complete nuclear internal transcribed spacer 2 (ITS2) of the species collected from seven Korean localities. A total of 17 haplotypes (CACOI01~CACOI17), with the maximum sequence divergence of 3.04% (20 bp) were obtained from COI gene sequence, whereas 16 sequence types (ITS2CA01~ITS2CA16), with the maximum sequence divergence of 2.013% (9 bp) were obtained from ITS2, indicating substantially larger sequence divergence in COI gene sequence. Phylogenetically, the COI gene provided two haplotype groups with a high nodal support (${\geq}87%$), whereas ITS2 provided only one sequence type group with a high nodal support (${\geq}92%$). The result of COI gene sequence may suggest the presence of historical biogeographic barriers that bolstered genetic subdivision in the species. Different grouping pattern between COI gene and ITS2 sequences were interpreted in terms of recent dispersal, reflected in the ITS2 sequence. Finding of unique haplotypes and sequence types only from Beakryeng-Islet population was interpreted as an intact remnant of ancient polymorphism. As more samples are analyzed using further hyper-variable marker, further fruitful inference on the geographic contour of the species might be available.
Park, Hae Gyun,Park, Pyung Gul,Kim, Won Joong,Park, Yong Hee,Kang, Hyun,Baek, Chong Wha,Jung, Yong Hun,Woo, Young Cheol,Koo, Gill Hoi,Shin, Hwa Yong The Korean Pain Society 2014 The Korean Journal of Pain Vol.27 No.1
Postherpetic neuralgia (PHN) is one of the most difficult pain syndromes to treat. Invasive treatments may be considered when patients fail to obtain adequate pain relief from noninvasive treatment approaches. Here, we present three cases of PHN in the mandibular branch treated with ultrasound-assisted mental nerve block and pulsed radiofrequency treatment. None of the patients had adequate pain relief from the medical therapy, so we performed the mental nerve block on the affected side under ultrasound assistance. Two patients showed satisfactory pain relief continuously over 12 months without any further interventions, whereas one patient only had short-term pain relief. For the patient had short-term pain relief we performed pulsed radiofrequency treatment (PRFT) on the left mental nerve under ultrasound assistance. After PRFT, the patient had adequate pain relief for 6 months and there was no need for further management.
Park, Jung-Hoon,Hong, Wan-Shick,Yoon, Kyung Joong,Lee, Jong-Ho,Lee, Hae-Weon,Son, Ji-Won The Electrochemical Society 2014 Journal of the Electrochemical Society Vol.161 No.1
<P>Binary nanocomposite thin films of lanthanum strontium cobaltite and gadolinia-doped ceria (La<SUB>0.6</SUB>Sr<SUB>0.4</SUB>CoO<SUB>3−δ</SUB>-Ce<SUB>0.9</SUB>Gd<SUB>0.1</SUB>O<SUB>2−δ</SUB>, LSC-GDC) were prepared using pulsed laser deposition (PLD) for application as cathodes of low-temperature operating solid oxide fuel cell (LT-SOFC). The thin films were fabricated under identical deposition conditions, but the LSC:GDC mixing ratio was varied. The PLD-processed LSC-GDC nanocomposites exhibit different physical and electrochemical properties than do conventional powder-processed composite SOFC cathodes. The LSC:GDC mixing ratio not only alters the composition of the LSC-GDC nanocomposite thin films but also affects their crystallographic orientation and microstructure. The major component of the composite appears to govern the physical properties of the LSC-GDC nanocomposite thin films. The electrochemical properties measured with AC impedance spectroscopy during the half-cell tests reveal that the electrochemical performance of the LSC-GDC nanocomposite cathode is enhanced as the LSC content in the composite increases, which is in contrast to the behavior of powder-processed composite cathodes. The present study provides important insight into the design and application of thin-film-processed nanocomposite electrodes.</P>
Park, Joong-Min,Suh, Suk-Won,Kwak, Jung-Myun,Kim, Jin,Kim, Seon-Hahn Lippincott Williams Wilkins 2011 Surgical laparoscopy, endoscopy & percutaneous tec Vol.21 No.5
<P>Laparoscopy-assisted colectomy is accepted as a standard procedure for colorectal resection. There have been many attempts to minimize the invasiveness of the procedure by reducing the number of operating ports and changing the specimen retrieval windows. Indeed, the invasiveness of laparoscopy-assisted colectomy has been minimized with these attempts; however, the technical challenges have increased. The technical challenges are related to lack of retraction and triangulation, which is necessary to expose the appropriate surgical field for safe surgery. A new technique based on retraction and triangulation with suspension suture traction for laparoscopy-assisted colorectal surgery is presented.</P>
Park, Chul-Min,Ahn, Won-Ju,Jo, Woong-Kyu,Song, Jin-Hun,Oh, Chang-Yeop,Jeong, Young-Shin,Chung, Min-Chul,Park, Kwon-Pil,Kim, Ki-Joong,Jeong, Woon-Jo,Sohn, Bo-Kyun,Jung, Sang-Chul,Lee, Do-Jin,Ahn, Byeon American Scientific Publishers 2015 Journal of nanoscience and nanotechnology Vol.15 No.1
<P>The greenhouse effect of carbon dioxide (CO2) has been recognized as one of the most serious problems in the world. Conversion of CO2 to methyl alcohol (CH3OH) was studied using catalytic chemical methods. Honeycomb-typed monolith used as catalyst support was 400 cell/inch2. Pretreatment of the monolith surface was carried out by thermal treatment and acid treatment. Monolith-supported nanosized CuO-ZnO catalysts were prepared by wash-coat method. The prepared catalysts were characterized by using SEM, TEM, and XRD. The catalytic activity for CO2 hydrogenation to CH3OH was investigated using a flow-type reactor with varying reaction temperature, reaction pressure and contact time. Conversion of CO2 was increased with increasing reaction temperature, but selectivity to CH3OH was decreased. Optimum reaction temperature was about 250 degrees C under 20 atm. Because of the reverse water gas shift reaction.</P>