Characterization of cricket song patterns and the behavior observation of Teleogryllus emma (Orthoptera:Grylloidea)

Ji Chang Woo,Kim Nam-Jung,Lee Sang-Guei,Hwang-Yong Kim,Choi Hoon-Sik,Song In-Sun,Ko Jee Sun 한국응용곤충학회 2010 한국응용곤충학회 학술대회논문집 Vol.2010 No.05

We analyzed the chirp sound and behavior of Teleogryllus emma with observation system, which was consisted of computer, ccd-camera and microphone. Computational methods of wavelet transformation and Self-Organizing Maps (SOM) were utilized to characterized the chirp sound of insect species for automatic counting in this study. Wavelets were initially applied to feature extraction of the chirp sound. Wavelet coefficients were accordingly calculated based on the basis function (e.g., Morlet). The obtained coefficients were subsequently provided to count number of chirps in each song. Sound structure of insect specimens consisted with long chirp and short chirp and the patterns of song were grouped by frequency of long chirp and short chirp. The song patterns of insect specimens were divided by Self-Organizing Map (SOM) that was used number of chirp as input data. Application of computational methods to automatic detection of chirp sound was further discussed for obtaining objective assessment in behavior science.

유산소성 운동이 노인들의 신체조성과 등속성 슬관절 근력 및 요부근력에 미치는 영향

한종우(Jong Woo Han),이상석(Sang Sug Lee),송분도(Bun Do Song),지용석(Yong Suk Ji),김난수(Nan Su Kim),서경호(Kyeong Ho Seo) 한국사회체육학회 2000 한국사회체육학회지 Vol.13 No.-

This study was designed to investigate the effect of a year aerobic exercise training on body composition, isokinetic knee and trunk muscular strength of elders. The subjects for this study were eighty healthy elderly people who were members of seniors tower at Song-Do Hospital and didn`t have any history of cardiorepiratory disease. Subjects have been trained three times a week for a year. The exercise program was made up of a 15-minute warm-up, cool-down. Stretching was performed every eight minutes for the prevention of injuries which could occur during the main exercise and quick recovery of the used muscle. Aerobic training was performed for each 15-20minutes using the treadmill and cycle ergometer at the intensity of 50-70% HRmax. For the data, all the measurements were represented by mean and standard deviation using SAS package(version 6.12). Statistical techniques for data analysis were paired t-test to determine the difference between pre and post exercise program. The 5% level of significance was used as the critical level for acceptance of hypotheses for the study. The following results were obtained from this study. 1. There is a statistically significant difference in the VO_2max, fat mass, lean mass and %body fat both old men and women after a year training. 2. There is not a statistically significant difference in the weight, WHR and thigh circumference both old men and women after a year training. 3. There is a statistically significant difference in the right knee flexor/extensor peak torque, peak torque % body weight, total work and total work % body weight both old men and women after a year training. 4. There is a statistically significant difference in the left knee flexor/extensor peak torque, peak torque % body weight, total work and total work % body weight both old men and women after a year training.

Solvent Extraction of Silver from Nitric Acid Solution with 5,8-Diethyl-7-hydroxy-dodecan-6-oxime

Song, Hyoung-Il,Min, Byoung-Jun,Cho, Sung-Yong,Sun, Pan-Pan The Society of Chemical Engineers Japan 2015 Journal of chemical engineering of Japan Vol.48 No.10

Zero-internal fields in nonpolar InGaN/GaN multi-quantum wells grown by the multi-buffer layer technique

Song, Hooyoung,Kim, Jin Soak,Kim, Eun Kyu,Seo, Yong Gon,Hwang, Sung-Min IOP Pub 2010 Nanotechnology Vol.21 No.13

<P>The potential of nonpolar <I>a</I>-plane InGaN/GaN multi-quantum wells (MQWs), which are free from a strong piezoelectric field, was demonstrated. An <I>a</I>-GaN template grown on an <I>r</I>-plane sapphire substrate by the multi-buffer layer technique showed high structural quality with an omega full width at half maximum value along the <I>c</I>-axis of 418 arcsec obtained from high-resolution x-ray diffraction analysis. From barrier analysis by deep level transient spectroscopy, it appeared that <I>a</I>-plane InGaN/GaN MQWs can solve the efficiency droop problem as they have a lower electron capture barrier than the <I>c</I>-plane sample. The peak shift of the temperature-dependent photoluminescence signal for the nonpolar InGaN/GaN MQWs was well fitted by Varshni’s empirical equation with zero-internal fields. A high photoluminescence efficiency of 0.27 from this sample also showed that nonpolar MQWs can be the key factor to solve the efficiency limitation in conventional <I>c</I>-plane GaN based light emitting diodes. </P>

Detection of K-ras Oncogene Point Mutations in Human Colorectal Cancers by Using Paired Polymerase Chain Reaction

Song, Young Tack,Lee, Jong Seo,Chang, Suk Kyun,Choo, Sang Yong CATHOLIC MEDICAL CENTER 1992 Bulletin of the Clinical Research Institute Vol.20 No.1

The genetic and hereditary alteration such as gene amplification, point mutation, allelic loss of tumor suppressor goner change of oncogene products have been studied and reported recently. Among the those genetic alterations, the point mutation of ras oncogene is thought to be one of the most important event during colorectal tumorigenesis. There are reports that about 11 kinds of ras oncogene point mutation on codon 12, 13 and 61 were detected. The frequency of mutation is 40%-5095 in colorectal cancers and is related with metastatic acquisition, location of tumors, stage of disease but not with tumor cell differentiation. In order to detect ras oncogene point mutation in colorectal cancers, authors tried to develop new methods using paired PCR of DNA samples followed by gel electrophoresis after confirming by dot blot test of PCR-DNA with synthetic oligonucleotide probe tailing with digoxigenin-11-dUTP and terminal transferase. With this method, 30 cases of colorectal cancer tissues and 10 cases of normal colonic mucosa were examined the frequency of point mutations on codon 12 of ras oncogene and analysed the relation with stage of disease, location of tumors, lymph node metastasis and tumor cell differentiation. The obtained results were as follows; 1. The dot blot test for PCR-DNA which were positive by gel-electrophoresis revealed positive results with synthetic oligonucleotide probe-Ⅰ and Ⅱ in cases of primer-Ⅰand Ⅱ positive PCR-DNA from colorectal cancer cases. 2. The DNA labeling method with nonradioactive digoxigenin-11-dUTP by tailing with terminal transferase and dot blot by digoxigenin detection method are considered relatively simple, less time consumed and sensitive methods. 3. The incidence of four point mutation on codon 12 in 30 colorectal cancer cases was 66.7% (20/30 cases) and distribution was GGT-GAT 26.7%, GGT-AGT 23.3%, GGT-TGT 23.3%, GGT-GTT 30.0%. 4. The frequency of point mutation by Dukes’ stages were 81.8% in Dukes’ B, 60.0% in Dukes’ C and 50.0% in Dukes’ D which revealed more frequent detection in early stage of disease. But there was no relation with tumor cell differentiation. On the other hand, the incidence of location were 90% from above sigmoid colon, 72.7% from sigmoid colon and 33.3% in rectum which revealed decreasing frequency from proximal colon to distal rectum. With above results authors concluded that the point mutations on codon 12 of ras oncogene is considered to be an important genetic change in colorectal cancers and the method to detect point mutations using paired PCR and gel electrophoresis is relatively simple, less time consuming and sensitive.

Effects of different cellulose membranes regenerated from <i>Styela clava</i> tunics on wound healing

Song, Sung Hwa,Seong, Keum Yong,Kim, Ji Eun,Go, Jun,Koh, Eun Kyoung,Sung, Ji Eun,Son, Hong Joo,Jung, Young Jin,Kim, Hye Sung,Hong, Jin Tae,Hwang, Dae Youn UNKNOWN 2017 INTERNATIONAL JOURNAL OF MOLECULAR MEDICINE Vol.39 No.5

<P>The aim of this study was to investigate the therapeutic effects of three different cellulose membranes (CMs) manufactured from <I>Styela clava</I> tunics (SCTs) on the healing of cutaneous wounds. We examined the physical properties and therapeutic effects of three CMs regenerated from SCTs (referred to as SCT- CMs), including normal CM (SCT-CM), freeze-dried SCT-CM (FSCT-CM) and sodium alginate-supplemented SCT-CM (ASCT-CM) on skin regeneration and angiogenesis using Sprague-Dawley (SD) rats. FSCT-CM exhibited an outstanding interlayered structure, a high tensile strength (1.64 MPa), low elongation (28.59%) and a low water vapor transmission rate (WVTR) compared with the other SCT-CMs, although the fluid uptake rate was maintained at a medium level. In the SD rats with surgically wounded skin, the wound area and score of wound edge were lower in the FSCT-CM-treated group than in the gauze (GZ)-treated group on days 3–6 and 12–14. In addition, a significant attenuation in the histopathological changes was observed in the FSCT-CM-treated group. Furthermore, the expression level of collagen-1 and the signaling pathway of transforming growth factor (TGF)-β1 were significantly stimulated by the topical application of FSCT-CM. However, no signs of toxicity were detected in the livers or kidneys of the three SCT-CM-treated groups. Overall, our data indicate that the FSCT-CM may accelerate the process of wound healing in the surgically wounded skin of SD rats through the regulation of angiogenesis and connective tissue formation without inducing any specific toxicity.</P>

Usage of retro MTA for apexogenesis in immature permanent teeth

( Yong-ho Song ),( Sang-ho Lee ),( Nan-young Lee ),( Young-mi Yoon ),( Sung-ok Im ),( Se-ok Kwon ),( Hwa-kyoung Jeong ) 조선대학교 구강생물학연구소 2016 Oral Biology Research (Oral Biol Res) Vol.40 No.2

As long as the pulp vitality is maintained, partial pulpotomy can promote healing of the necrotized pulp and induce root development in the treatment of immature permanent crowns which are fractured and have pulp exposure due to trauma. However, mineral trioxide aggregate (MTA) is commonly used in this technique due to its superior sealing effect, but the disadvantage of discoloration when used for the anterior teeth still persists. In this case study, for prevention of tooth discoloration following regenerative root canal treatment, Retro MTA was used as an alternative for MTA. Retro MTA is made of zirconium aluminate cement, which replaces Portland cement used in MTA, which is thought to be the factor that induces discoloration. We report a successful case without any noticeable discoloration after applying Retro MTA, following partial pulpotomy.

Package-level integrated antennas based on LTCC technology

Sang-Hyuk Wi,Yong-Bin Sun,In-Sang Song,Sung-Hoon Choa,Koh, I.-S.,Yong-Shik Lee,Jong-Gwan Yook IEEE 2006 IEEE transactions on antennas and propagation Vol.54 No.8

<P>We propose a novel package topology integrating multilayer miniaturized antennas. Such a functional package is suitable for the design of a system-on-chip device, or of system-on-package applications. A stacked patch antenna is designed and integrated in a package using a low temperature co-fired ceramic process. The overall size of the package is 10.3times10.3times1.3 mm<SUP>3</SUP>, and this package contains an 8.3times8.3times0.7 mm<SUP>3</SUP> internal space for the integration of chip-scale packaged components. The package is mounted on a 20times20 mm<SUP>2</SUP> ground plane to miniaturize the volume of the system. The antenna is designed to have two neighboring resonant frequencies at 5.264 and 5.355 GHz, resulting in a 140 MHz impedance bandwidth. However, the measured resonant frequencies occur at slightly higher frequencies due to manufacturing tolerances. Radiation patterns are similar to a conventional patch antenna. In addition, various parasitic effects rooted in the package size, ground size, antenna height, SMA connector, via misalignment, and the number of via holes and their locations are fully investigated</P>

Growth of FePt nanocrystals by a single bimetallic precursor [(CO)₃Fe(μ-dppm)(μ-CO)PtCl₂]

Song, Hyon Min,Hong, Jung Hoon,Lee, Yong Bok,Kim, Wan Seop,Kim, Youngmee,Kim, Sung-Jin,Hur, Nam Hwi Royal Society of Chemistry 2006 Chemical communications Vol.2006 No.12

<P>A new single source approach was developed to synthesize face-centered tetragonal (fct) FePt nanoparticles using bimetallic compound (CO)<SUB>3</SUB>Fe(μ-dppm)(μ-CO)PtCl<SUB>2</SUB>, which has been characterized by single crystal X-ray diffraction and was used as the precursor to ensure the accurate stoichiometry of the final FePt product; the ability of the molecular complex to act as a single source precursor for the formation of fct FePt nanocrystals with an average diameter of 3.2 nm has been demonstrated.</P> <P>Graphic Abstract</P><P>Face-centered tetragonal FePt nanoparticles were synthesized from the bimetallic compound (CO)<SUB>3</SUB>Fe(μ-dppm)(μ-CO)PtCl<SUB>2</SUB>. This process represents an important step toward the synthesis of ferromagnetic nanoparticles which serve as a high density magnetic media matrix. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=b516831g'> </P>

Effects of Green Tea Extract and Its Components on the Brain Neurotransmitters in ICR Mice

Sung-Jin Choi(최성진),Hee-Yong Lee(이희용),Ho-Sub Lee(이호섭),Ari Cho(조애리),Sung-Don Yang(양승돈),Hye-Suk Lee(이혜숙),Chang-Woo Song(송창우),Sang-Seop Han(한상섭) 한국실험동물학회 1999 Laboratory Animal Research Vol.15 No.3