Development of a Mobile Application, "Wild Flowers of Bukhansan National Park (version 1.0)", for Identification of Plants in Bukhansan National Park

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.

Sugical Treatment of Mucositis and Fungal Infection in the Acute Leukemic Patients

( Won Suk Ha ),( Young Geun Ye ),( Jae Hong Park ),( Sung Un Pyo ),( Hyun Jung Yun ),( Sang Hwa Lee ) 대한악안면성형재건외과학회 2006 Maxillofacial Plastic Reconstructive Surgery Vol.28 No.S1

Performance Analysis for Mirrors of 30 cm Cryogenic Space Infrared Telescope

Park, Kwi-Jong,Moon, Bong-Kon,Lee, Dae-Hee,Jeong, Woong-Seob,Nam, Uk-Won,Park, Young-Sik,Pyo, Jeong-Hyun,Han, Won-Yong 한국우주과학회 2012 Journal of Astronomy and Space Sciences Vol.29 No.3

We have designed a 30 cm cryogenic space infrared telescope for astronomical observation. The telescope is designed to observe in the wavelength range of 0.5~2.1 μm, when it is cooled down to 77 K. The result of the preliminary design of the support structure and support method of the mirror of a 30 cm cryogenic space infrared telescope is shown in this paper. As a Cassegrain prescription, the optical system of a 30 cm cryogenic space infrared telescope has a focal ratio of f/3.1 with a 300 mm primary mirror (M-1) and 113 mm secondary mirror (M-2). The material of the whole structure including mirrors is aluminum alloy (Al6061-T6). Flexures that can withstand random vibration were designed, and it was validated through opto-mechanical analysis that both primary and secondary mirrors, which are assembled in the support structure, meet the requirement of root mean square wavefront error <λ/8 for all gravity direction. Additionally, when the M-1 and flexures are assembled by bolts, the effect of thermal stress occurring from a stainless steel bolt when cooled and bolt torque on the M-1 was analyzed.

Determination of Boron Isotopic Ratio by Using an Alpha Track Technique

Park, Yong-Joon,Pyo, Hyung-Yeal,Song, Kyu-Seok,Song, Byoung-Chul,Jee, Kwang-Yong,Kim, Won-Ho Korean Chemical Society 2006 Bulletin of the Korean Chemical Society Vol.27 No.10

The determination of the boron isotopic ratio in solutions was achieved by means of a solid state track detector by using an alpha track. The neutron flux was optimized by using a Cd-foil to find the optimum conditions for counting the number of alpha tracks on the selected solid detector caused by the (n, $\alpha$) nuclear reaction of boron. The home-made multi-dot detector plate was utilized in this study to increase the reproducibility of the measurement by uniformly drying the boron solution within the marked circle area on the detector plate. The experimental results of this study verified that the $^{11}B/^{10}B $ isotopic ratio can be measured by observing the number of alpha tracks for different concentrated standard solutions with various isotopic compositions. This technique was applied to the determination of $^{10}B$ enrichment factor in a biological sample for a boron neutron capture therapy.

Cation Exchange Capacity in Korean Soils Determined by the Copper(II) Acetate Spectrophotometry Method

Won-Pyo Park,Kong-Man Chang,Bon-Jun Koo,Hae-Nam Hyun 한국토양비료학회 2017 한국토양비료학회지 Vol.50 No.6

Copper(II) acetate spectrophotometry method (CASM) was used for the rapid and convenient determination of cation exchange capacity (CEC) in soils. This method is composed of a single-step exchange reaction that adsorbs copper and is measured through spectrophotometry. The CEC of 16 Korean soils were measured using 1M ammonium acetate method (AAM) and the CASM. The CEC values determined by CASM and AAM were not significantly different, and were highly correlated (r = 0.966**). Due to the convenience, cost effectiveness, and time saving analysis of CASM, this method is recommended for most soil laboratories to measure CEC in Korean soils. However, CASM may not be applicable for soils that have a much higher CEC (greater than 20 cmolc kg<SUP>-1</SUP>).

Lung function, coronary artery calcification, and metabolic syndrome in 4905 Korean males

Park, Hye Yun,Lim, Seong Yong,Hwang, Jung Hye,Choi, Jin-Ho,Koh, Won-Jung,Sung, Jidong,Suh, Gee Young,Chung, Man Pyo,Kim, Hojoong,Choe, Yeon Hyeon,Woo, Sookyoung,Jung Kwon, O. Elsevier 2010 Respiratory medicine Vol.104 No.9

<P><B>Summary</B></P><P><B>Background</B></P><P>Impaired lung function is an independent predictor of cardiovascular mortality. We assessed the relationships of lung function with insulin resistance (IR), metabolic syndrome (MetS), systemic inflammation and coronary artery calcification score (CACS) measured by computed tomography (CT) scan an indicator of coronary atherosclerosis.</P><P><B>Methods</B></P><P>We identified 4905 adult male patients of the Health Promotion Center in Samsung Medical Center between March 2005 and February 2008 and retrospectively reviewed the following data for these patients: pulmonary function, CT-measured CACS, anthropometric measurement, fasting glucose, insulin, lipid profiles, serum C-reactive protein (CRP) and homeostatic model assessment (HOMA-IR). MetS was defined according to the AHA/NHLBI criteria.</P><P><B>Results</B></P><P>When the subjects were divided into four groups according to quartiles of FVC or FEV<SUB>1</SUB> (% pred), serum CRP level, HOMA-IR, prevalence of MetS and CACS significantly increased as the FVC or FEV<SUB>1</SUB> (% pred) decreased. The odds ratios (ORs) for MetS in the lowest quartiles of FVC and FEV<SUB>1</SUB> (% pred) were 1.85 (95% CI, 1.49–2.30; <I>p</I><0.001) and 1.47 (95% CI, 1.20–1.81; <I>p</I><0.001) respectively. The ORs for the presence of coronary artery calcification in the lowest quartiles of FVC and FEV<SUB>1</SUB> (% pred) were 1.31 (95% CI, 1.09–1.58; <I>p</I>=0.004) and 1.22 (95% CI, 1.02–1.46; <I>p</I>=0.029) respectively. Obesity, CRP, HOMA-IR, and the presence of coronary artery calcium were independent risk predictors for impaired lung function.</P><P><B>Conclusion</B></P><P>Metabolic syndrome, insulin resistance, coronary atherosclerosis, and systemic inflammation are closely related to the impaired lung function.</P>

Validation of the Pentax-AWS Airwayscope as a Prehospital Intubation Device by Korean Level 1 Emergency Medical Technicians; A Simulation Study Using an Airway Training Manikin

( Won Suk Jung ),( Yong Jin Park ),( Sun Pyo Kim ),( Seong Jung Kim ),( Soo Hyung Cho ),( Nam Soo Cho ),( Kyeong Hoon Seon ) 대한응급의학회 2012 대한응급의학회지 Vol.23 No.5

Purpose: Tracheal intubation in the pre-hospital setting may be lifesaving in severely ill and injured patients. The aim of the current study was to evaluate whether use of the video laryngoscope, when used by Korean level 1 emergency medical technicians, resulted in faster or more secure facilitation of tracheal intubation, compared with the conventional laryngoscope with the immobilized cervical spine lying on the ground. Methods: Thirty two level 1 EMTs working as 119 rescuers performed tracheal intubation on a manikin using the Macintosh laryngoscope (McL) and the Pentax-AWS? airwayscope (AWS) “on-the-bed” and “on-the-ground” in simulations with or without cervical spine immobilization. We compared intubation time, dental injury, and visual analog scale for both types of laryngoscope. Results: In the McL trial, four participants failed on the bed, and 11 failed on the ground with cervical immobilization. In the AWS trial, all participants successfully secured the airway regardless of cervical spine immobilization both on the bed and on the ground. With the AWS, intubation time was not lengthened due to cervical spine immobilization either on the bed or on the ground. The AWS score was better than the McL on the visual analog scale in ease of handling the laryngoscope both on the bed and on the ground. And use of the AWS resulted in the lowest number of dental compressions. Conclusion: We conclude that the AWS is an effective and safe device for use in pre-hospital intubation with cervical spine immobilization, not only on the bed but also on the ground, when used by Korean level 1 EMTs. However, conduct of further studies is required in order to validate the clinical relevance of these findings.

Bacterial Solubilization of Phosphorus from Bone Meal through Oxidization of Bio-Sulfur with Acidithiobacillus thiooxidans

Won-Pyo Park,Myung-Hyup Oh,Yong-Chull Jeun 한국토양비료학회 2021 한국토양비료학회지 Vol.54 No.4

Leaching experiments of bone-meal phosphorus (P) solubilization by the sulfur-oxidizing bacteria Acidithiobacillus thiooxidans was carried out using the shake-flask methodology. The effects of bone meal dosage, bio-sulfur (bio-S) concentration, and amount of bacterial inoculum on the efficiency of P solubilization were determined. The bone meal was dissolved in bacterially produced sulfuric acid to form “soluble P.” An increase in concentration of bio-S as an energy substrate for the acidophilic A. thiooxidans increased the P solubilization efficiency. Upon addition of 5% bio-S, 10% bone meal, and 10% A. thiooxidans to the leach suspension, its pH dropped from 5.22 to 1.92 between days 30 and 40 of the leaching experiment; this resulted in an increase in water-soluble P concentration by 23.8 g P2O5 L<SUP>-1</SUP>. The soluble P concentration in the suspension from the bioleaching experiment was >20 times higher than that in conventional liquid bone-meal fertilizers. Inorganic nutrients, such as N, Ca, and Mg, were also solubilized in the suspension during the bioleaching experiment. The role of bio-S as an energy substrate for acidophilic bacteria to leach P from bone meal during formulation of biofertilizers could potentially be exploited in the management of crop nutrients in organic farming.

Determination of Chemical Compositions and Oxidation States for Corrosion Products in LiCl Molten Salts

Park, Yong-Joon,Pyo, Hyung-Ryul,Kim, Do-Yang,Jee, Kwang-Yong,Kim, Won-Ho Korean Nuclear Society 2000 Nuclear Engineering and Technology Vol.32 No.5

The mechanism of corrosion behavior has to be understood clearly to select an optimum material for handling molten salts to be used in the oxide reduction process of PWR spent fuel. In this study, the oxidation states of corrosion products on the surface of Inconel 600 and 800H as well as their chemical compositions and structural informations were determined by using XPS, ICP-AES, AAS, EPMA and XRD after the corrosion experiment with lithium molten salts at 75$0^{\circ}C$ for 25 hours. Nickel and oxygen were detected from the corrosion products on the surface of Inconel plates and chromium was found to be dissolved out into lithium molten salts leaving cracks on the surface. The corrosion products were identified as metal oxides such as Fe$_2$O$_3$, Cr$_2$O$_3$, NiO, NiFe$_2$O$_4$and MnO by using XPS and XRD.

Chemical Methods Used in Petrological Analysis of Koongarra Uranium Ore Samples in ASSAR Natural Analogue Program

Park, Yong-Joon,Pyo, Hyung-Ryul,Kim, Ji-Young,Kim, Won-Ho Korean Nuclear Society 1998 Nuclear Engineering and Technology Vol.30 No.6

A natural analogue study has been performed for the Koongarra uranium ore deposit in Australia as an international agreement of the Analogue Studies in the Alligator Rivers Region (ASARR). Rocks obtained from the Koongarra deposit, Northern Territory of Australia, were examined in order to understand uranium migration processes of primary and secondary ore-body in both weathered and unweathered zones. Total alpha activities of rock samples were measured to compare the relative amount of uranium in the sample. Uranium distributions have been investigated by means of both the alpha-autoradiography and the fission track registration technique after irradiation in a flux of thermal neutrons (~10$\times$$10^{13}$nㆍ$cm^{-2}$ㆍs$^{-1}$) for 2 minutes. The mineral phases corresponding to the registered alpha-tracks and fission tracks were identified by petrological observation with optical microscope as well as X-ray diffraction and electron microprobe analysis (EPMA). Uranium was found mostly inside of the fracture of the quartzite and its mineral phase was identified as sklodowskite. The mineral phase associated with high uranium concentration was found as illeminite by petrological observation with optical microscope as well as EPMA.