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Search Results: 1 - 10 of 45091 matches for " Dong Gyu Kim "
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Organizing Pneumonia by Paragonimiasis and Coexistent Aspergilloma Manifested as a Pulmonary Irregular Nodule
In Jae Lee,Jinwon Seo,Dong Gyu Kim
Case Reports in Radiology , 2011, DOI: 10.1155/2011/692405
Abstract: Organizing pneumonia by paragonimiasis and coexistent aspergilloma as a pulmonary nodule is a rare case of lung disease. Its radiographic or CT feature has not been described before in the radiologic literature. We present organizing pneumonia by paragonimiasis and coexistent aspergilloma manifested as a pulmonary irregular nodule on CT.
An Auto-Configuration of 4M Group Management Using Wireless Sensor Networks  [PDF]
Suk-Keun Cha, Jeong-Hoon Lee, Han Gyu Kim, Joon Jae Yoo, Jung Hoon Kang, Dong Hoon Kim, Jun Yeob Song
Wireless Sensor Network (WSN) , 2010, DOI: 10.4236/wsn.2010.24052
Abstract: The first tier of automotive manufacturers has faced to pressures about move, modify, updating tasks for manufacturing resources in production processes from demand response of production order sequence for motor company and process innovation purpose for productivity. For meets this requirements, it has to require absolutely lead time to re-wiring of physical interface for production equipment, needs for change existing program and test over again. For prepare this constraints, it needs studying an auto-configuration functions that build for both visibility and flexibility based on the 4M (Man, Machine, Material, Method) group management which is supports from WSN (Wireless Sensor Network) of the open embedded device called M2M (Machine to Machine) and major functions of middleware including point manager for real-time device communication, real-time data management, Standard API (Application Program Interface) and application template management. To be application system to RMS (Reconfigurable Manufacturing System) for rapidly response from various orders and model from motor company that is beginning to establishing the mapping of manufacturing resources of 4M using WSN.
Comparison of Cervical Parameters by Three-Dimensional Ultrasound according to Parity and Previous Delivery Mode
Yun Sung Jo, Dong Gyu Jang, Narinay Kim, Sa Jin Kim, Guisera Lee
International Journal of Medical Sciences , 2011,
Abstract: Background: We would like to find out that whether the patient's parity, previous delivery mode and previous labor could influence cervical parameters. Cervical length, volume and width were measured using two-dimensional (2D) and three-dimensional (3D) transvaginal ultrasound on normal pregnant women. Method: This study was conducted between January 2009 and December 2010 in singleton pregnant women who were admitted for routine antenatal care at hospitals in affiliation with the Catholic University, Seoul, Korea. The study group was classified by parity (nullipara and multipara) and previous delivery mode (cesarean section group and vaginal delivery group). The previous cesarean section group was divided by elective group who did not undergo labor and labor group who underwent labor. Cervical parameters such as cervical length, volume and width were measured using 2D and 3D ultrasound examinations in the first and second trimesters and the results were analyzed between those groups mentioned above. Results: One hundred and twenty-one pregnant women in their 1st trimester and 233 pregnant women in their 2nd trimester (a total of 354) were enrolled in this study. Cervical parameters were not statistically significant from parity, nor previous delivery mode and previous labor in 1st trimester. Cervical volumes were not statistically significant from nullipara and elective cesarean section groups (35.96±9.81 vs. 34.73±9.75 cm3), but the nullipara groups were significantly lowered in the vaginal group (35.96±9.81 vs. 43.10±11.87 cm3) in 2nd trimester. For the nullipara group, cervical widths were not statistically significant in the elective cesarean section group but these were significantly lower than labor and previous vaginal group in the 2nd trimester. Conclusion: The cervical volume and width have an influence on parity, previous delivery mode and labor in the 2nd trimester.
Absorbable Plate as a Perpendicular Strut for Acute Saddle Nose Deformities
Jong Gyu Kim,Seung Chul Rhee,Pil Dong Cho,Deok Jung Kim
Archives of Plastic Surgery , 2012, DOI: http://dx.doi.org/10.5999/aps.2012.39.2.113
Abstract: Background Nasal pyramid fractures accompanied by saddle nose deformities are noteasily corrected by closed reduction. We used an absorbable plate as a perpendicular strut tosupport the collapsed “keystone area” and obtained good results.Methods Between September 2008 and June 2011, 18 patients who had nasal pyramidfractures with saddle nose deformities underwent surgery. Pre- and postoperative facialcomputed tomographic images and photographs were taken to estimate outcomes. Theoperative technique included the mucoperichondrial dissection of the nasal septum, insertionof an absorbable plate prepared to an appropriate length to support the “keystone area”, andfixation of the absorbable plate strut to the cartilaginous septum.Results Functional and esthetic outcomes were satisfactory in all patients. Eleven patientsassessed the postoperative appearance of the external nose as ‘markedly improved’ and 7patients as ‘improved’. The 5 surgeons scored the results as a mean of 4.5 on a 5-point scale.Conclusions The use of an absorbable plate as a perpendicular strut requires no additionalprocedures because the plate is gradually absorbed. The mechanical strength provided by abuttress between the “keystone area” and the maxillary crest lasts for a long time before thestrut is absorbed.
Image and Video Quality Assessment Based on the Similarity of Edge Projections
Dong-O Kim,Rae-Hong Park,Dong-Gyu Sim
Signal & Image Processing , 2013,
Abstract: The goal of image or video quality assessment is toevaluate if a distorted image or video is of a goodquality by quantifying the difference between the original and distorted images or videos. In this paper, toassess the visual quality of an arbitrary distortedimage or a compressed video, visual features of the imageor video are compared with those of the original image or video instead of direct comparison of two imagesor videos. As visual features, we use directional edge projections that are simply obtained by projectingvertical and horizontal edges detected by verticaland horizontal Sobel masks, respectively. Then, toassessthe image or video quality, edge projections are compared using the similarity measures of one-dimensionalhistograms such as the histogram difference, histogram intersection, Kullback-Leibler divergence,χ-squaretest, and Bhattacharyya distance. Experimental results using LIVE data set and 140 video clips that arecompressed with H.263 and H.264/AVC show the effectiveness of the proposed methods through thecomparison with conventional algorithms such as thepeak signal-to-noise ratio (PSNR), structuralsimilarity, mean singular value decomposition, andedge PSNR (EPSNR) methods.
Patterned thin metal film for the lateral resolution measurement of photoacoustic tomography
Do-Hyun Kim, Dong Ho Shin, Sang-Hun Ryu, Chul-Gyu Song
BioMedical Engineering OnLine , 2012, DOI: 10.1186/1475-925x-11-37
Abstract: A patterned thin metal film deposited on silica glass provides high contrast in optical imaging due to high reflectivity from the metal film and high transmission from the glass. It provides high contrast when it is used for photoacoustic tomography because thin metal film can absorb pulsed laser energy. An US Air Force 1951 resolution target was used to generate patterned photoacoustic signal to measure the lateral resolution. Transducer with 2.25?MHz bandwidth and a sample submerged in water and gelatinous block were tested for lateral resolution measurement.Photoacoustic signal generated from a thin metal film deposited on a glass can propagate along the surface or through the surrounding medium. First, a series of experiments with tilted sample confirmed that the measured photoacoustic signal is what is propagating through the medium. Lateral resolution of the photoacoustic tomography system was successfully measured for water and gelatinous block as media: 0.33?mm and 0.35?mm in water and gelatinous material, respectively, when 2.25?MHz transducer was used. Chicken embryo was tested for biomedical applications.A patterned thin metal film sample was tested for its feasibility of measuring lateral resolution of a photoacoustic tomography system. Lateral resolutions in water and gelatinous material were successfully measured using the proposed method. Measured resolutions agreed well with theoretical values.
Comparison of Laparoscopic and Laparotomic Surgery for the Treatment of Peritoneal Inclusion Cyst
Suk Woo Lee, Sung Jong Lee, Dong Gyu Jang, Joo Hee Yoon, Jang Heub Kim
International Journal of Medical Sciences , 2012,
Abstract: Objectives: Peritoneal inclusion cyst (PIC) is defined as a fluid-filled mesothelial-lined cysts of the pelvis and it is most frequently encountered in women of reproductive age. The treatment options are observation, hormonal management, imaging-guided aspiration, image-guided sclerotherapy and surgical excision. The objective of this study is to compare between the laparoscopic and laparotomic surgery for the treatment of PIC. Methods: Thirty-five patients with laparoscopy and forty-eight patients with laparotomy were included in the study. We compared the perioperative and postoperative data, the complications and the recurrence between the two groups. Results: There was a significantly reduced mean length of the hospital stay, estimated blood loss and complication rate in the laparoscopic group as compared to that of the laparotomic group (P=0.037, P=0.047 and P=0.037 respectively). There was also no statistical difference of recurrence rate between thelaparoscopic and laparotomic groups on the Cox proportional hazards model (p=0.209). Conclusion: Our study showed that laparoscopy was superior to the laparotomy for the mean estimated blood loss, the mean length of the hospital stay and the complication rate except for the recurrence rate.
Monoamniotic Twins with One Fetal Anencephaly and Cord Entanglement Diagnosed with Three Dimensional Ultrasound at 14 Weeks of Gestation
Yun Sung Jo, Hyun Joo Son, Dong Gyu Jang, Narinay Kim, Guisera Lee
International Journal of Medical Sciences , 2011,
Abstract: A 29-year-old pregnant woman with parity 0-0-0-0 was diagnosed with monoamniotic twin pregnancy discordant for anencephaly at 14 weeks gestation. Umbilical cord entanglement, which is an important cause of fetal death in monoamniotic twins, was confirmed by three-dimensional ultrasound. Cesarean section was performed at 34 weeks of gestation, and the normal newborn infant was discharged without any complications. We report a case of monoamniotic twin pregnancy discordant for anencephaly and diagnosed with cord entanglement by three-dimensional ultrasound at 14 weeks of gestation, and now report it along with a literature review.
Clinical Efficacy of Cervical Length and Volume for Prediction of Labor Onset in VBAC Candidates
Yun Sung Jo, Gui Se Ra Lee, Narinay Kim, Dong Gyu Jang, Sa Jin Kim, Young Lee
International Journal of Medical Sciences , 2012,
Abstract: Background: The purpose of this research is to discover whether measurement of cervical length and cervical volume at term is helpful in predicting the onset of labor in VBAC candidates. Methods: Transvaginal sonographic evaluations of the cervixes of pregnant women who desired to undergo VBAC were performed between 36 - 40 weeks gestation. Clinical information such as labor onset time, gestational age at delivery and delivery mode was gathered from medical records. Results: A total of 514 pregnant women participated in this study. Cervical length was significantly longer in the group that delivered 7 days or more after measurement than in the group that delivered within 7 days of measurement (43±0.77 cm vs. 2.99±0.72 cm, p< 0.001). Cervical volume was significantly larger in the group that delivered at and after 7 days than in the group that delivered within 7 days (29.21±11.62 cm3 vs. 34.07±13.41 cm3, p=0.014). The cervical length ROC curve was significantly more predictive than the cervical volume ROC curve (AUC: 0.711 vs 0.594, p= 0.001). There were no significant differences between the combined cervical length/volume ROC curve and the cervical length ROC curve alone (p= 0.565). The AUC of the cervical length ROC curve to predict postterm pregnancy was 0.729. Conclusion: Measuring cervical length is helpful in predicting the onset of spontaneous labor within 7 days and posterm delivery in VBAC candidates.
Luminescence Properties of Si Nanocrystals Fabricated by Ion Beam Sputtering and Annealing
Sung Kim,Dong Hee Shin,Dong Yeol Shin,Chang Oh Kim,Jae Hee Park,Seung Bum Yang,Suk-Ho Choi,Seung Jo Yoo,Jin-Gyu Kim
Journal of Nanomaterials , 2012, DOI: 10.1155/2012/572746
Abstract: During the past several decades, Si nanocrystals (NCs) have received remarkable attention in view of potential optoelectronic device applications. This paper summarizes recent progress in the study of luminescence from Si NCs, such as photoluminescence (PL), cathodoluminescence, time-solved PL, and electroluminescence. The paper is especially focused on Si NCs produced by ion beam sputtering deposition of SiO single layer or SiO/SiO2 multilayers and subsequent annealing. The effects of stoichiometry () and thickness of SiO layers on the luminescence are analyzed in detail and discussed based on possible mechanisms.
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