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Search Results: 1 - 10 of 978 matches for " Ryu Okutani "
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Comparison of Clinical Problems in Thoracoscopic Esophagectomy between Prone Position with Pneumothorax Procedure and Lateral Position  [PDF]
Yoshihiro Kasagi,Ryu Okutani,Yukiko Komatsu,Yutaka Oda
Open Journal of Anesthesiology (OJAnes) , 2013, DOI: 10.4236/ojanes.2013.33034
Abstract: Study Objective: We compared the effects of intraoperative body position on blood gas and fluid balance in patients undergoing a thoracoscopic esophagectomy as well as during operation and postoperative laboratory data. Design: Prospective study. Setting: Operating room and intensive care unit. Patients: ASA physical status 1 and 2 patients (n = 26), scheduled for elective thoracoscopic esophagectomy and immediate reconstruction under general anesthesia with one-lung ventilation were enrolled. Interventions: Patients were assigned to either the lateral (n = 16) or prone (n = 10) position groups based on the planned intraoperative body position. A pneumothorax procedure was concomitantly performed only in the prone position group. Measurements: Fluid balance, PaO2/FIO2 ratio (P/F ratio), and maximum PaCO2 during the operation and postoperative laboratory data were analyzed. Main Results: There were no significant differences between the groups for amount of blood loss, blood transfusion, fluid infusion, or urine output. The P/F ratio during one-lung ventilation was significantly higher in the prone than the lateral position group (379 ± 122 vs. 297 ± 67 mmHg, p = 0.017), as was maximum intraoperative PaCO2 (72.2 ± 15.6 vs. 48.3 ± 6.3 mmHg, p < 0.001). Conclusions: A thoracoscopic esophagectomy in the prone position performed concomitantly with a CO2 pneumothorax procedure resulted in a significantly better P/F ratio during one-lung ventilation as compared to the lateral position, indicating that the prone position is more advantageous for oxygenation.
Comparison of Clinical Problems in Thoracoscopic Esophagectomy between Prone Position with Pneumothorax Procedure and Lateral Position  [PDF]
Yoshihiro Kasagi, Ryu Okutani, Yukiko Komatsu, Yutaka Oda, Yoshito Yamashita
Open Journal of Anesthesiology (OJAnes) , 2013, DOI: 10.4236/ojanes.2013.33034
Abstract:

Study Objective: We compared the effects of intraoperative body position on blood gas and fluid balance in patients undergoing a thoracoscopic esophagectomy as well as during operation and postoperative laboratory data. Design: Prospective study. Setting: Operating room and intensive care unit. Patients: ASA physical status 1 and 2 patients (n = 26), scheduled for elective thoracoscopic esophagectomy and immediate reconstruction under general anesthesia with one-lung ventilation were enrolled. Interventions: Patients were assigned to either the lateral (n = 16) or prone (n = 10) position groups based on the planned intraoperative body position. A pneumothorax procedure was concomitantly performed only in the prone position group. Measurements: Fluid balance, PaO2/FIO2 ratio (P/F ratio), and maximum PaCO2 during the operation and postoperative laboratory data were analyzed. Main Results: There were no significant differences between the groups for amount of blood loss, blood transfusion, fluid infusion, or urine output. The P/F ratio during one-lung ventilation was significantly higher in the prone than the lateral position group (379 ± 122 vs. 297 ± 67 mmHg, p = 0.017), as was maximum intraoperative PaCO2

Operating Characteristics of Multiple Evaporators and Multiple Condensers Loop Heat Pipe with Polytetrafluoroethylene Wicks  [PDF]
Sho Okutani, Hosei Nagano, Shun Okazaki, Hiroyuki Ogawa, Hiroki Nagai
Journal of Electronics Cooling and Thermal Control (JECTC) , 2014, DOI: 10.4236/jectc.2014.41003
Abstract:
This paper presents fabrication and testing of a multiple-evaporator and multiple-condenser loop heat pipe (MLHP) with polytetrafluoroethylene (PTFE) porous media as wicks. The MLHP has two evaporators and two condensers in a loop heat pipe in order to adapt to various changes of thermal condition in spacecraft. The PTFE porous media was used as the primary wicks to reduce heat leak from evaporators to compensation chambers. The tests were conducted under an atmospheric condition. In the tests that heat loads are applied to both evaporators, the MLHP was stably operated as with a LHP with a single evaporator and a single condenser. The relation between the sink temperature and the thermal resistance was experimentally evaluated. In the test with the heat load to one evaporator, the heat transfer from the heated evaporator to the unheated evaporator was confirmed. In the heat load switching test, in which the heat load is switched from one evaporator to another evaporator repeatedly, the MLHP could be stably operated. The loop operation with the large temperature difference between the heat sinks was also tested. From this result, the stable operation of the MLHP in the various conditions was demonstrated. It was also found that a flow regulator which prevents the uncondensed vapor from the condensers is required at the inlet of the common liquid line when one condenser has higher temperature and cannot condense the vapor in it.
A case of gastrocolocutaneous fistula as a complication of percutaneous endoscopic gastrostomy
Okutani,Daisuke,Kotani,Kazutoshi,Makihara,Shigeki
Acta Medica Okayama , 2008,
Abstract: A rare complication of percutaneous endoscopic gastrostomy (PEG) is gastrocolocutaneous fistula which usually occurs after replacement of the PEG tube. As tube feeding is directly delivered to the transverse colon, patients typically present with a sudden onset of transient diarrhea within minutes after PEG tube feeding. A radiographic study using water-soluble contrast material via the PEG tube shows the tip of the tube in the transverse colon. We present here a patient who had this complication after PEG insertion. A PEG tube for enteral feeding was placed in a 27-year-old man with cerebral plasty and a severe scoliosis. After replacement of the PEG tube, he developed diarrhea after each PEG tube feeding. The diagnosis of gastrocolocutaneous fistula was made after injection of gastrografin from the PEG tube. Another gastrostomy tube was placed surgically and the fistula was then also excised. In conclusion, gastrocolocutaneous fistula must be considered as a complication of PEG tube placement when patients with a PEG tube develop a sudden onset of transient diarrhea immediately after PEG tube feeding.
Mesocosm Assessment of Stability Habitat for Halophyte  [PDF]
Sunghoon Ryu, Incheol Lee
Journal of Geoscience and Environment Protection (GEP) , 2015, DOI: 10.4236/gep.2015.36003
Abstract:

In this paper, we constructed the halophyte Mesocosm experimental group which was used as a substrate material that consisted of tidal flat and dredged sediment. Depending on whether the ingredients of vegetation and substrate material of Mesocosm, we constructed Mesocosm A (tidal flat sediment + Salicornia herbecea), Mesocosm B (only dredged sediment), Mesocosm C (dredged sediment + Salicornia herbecea). Monitoring was carried out of seawater quality factors (Chemical Oxygen Demand (COD), Total Nitrogen (T-N), Total Phosphorus (T-P), temperature, salinity), sediment factors (Chemical Oxygen Demand (COD), Total (T-N), Total Phosphorus (T-P) and growth of Salricornia herbecea) in each Mesocosm. Habitat Stability Index of vegetation was calculating by using the monitoring results. HSI of Mesocosm C was calculated from 0.87 to 0.95 as compared to the relatively high HSI Mesocosm A, it was evaluated to be able to be used in the restoration of the coastal salt marsh with dredged sediment.

A Comparative Study of Machine Learning Algorithms and Their Ensembles for Botnet Detection  [PDF]
Songhui Ryu, Baijian Yang
Journal of Computer and Communications (JCC) , 2018, DOI: 10.4236/jcc.2018.65010
Abstract: A Botnet is a network of compromised devices that are controlled by malicious “botmaster” in order to perform various tasks, such as executing DoS attack, sending SPAM and obtaining personal data etc. As botmasters generate network traffic while communicating with their bots, analyzing network traffic to detect Botnet traffic can be a promising feature of Intrusion Detection System. Although such system has been applying various machine learning techniques, comparison of machine algorithms including their ensembles on botnet detection has not been figured out. In this study, not only the three most popular classification machine learning algorithms—Naive Bayes, Decision tree, and Neural network are evaluated, but also the ensemble methods known to strengthen classifier are tested to see if they indeed provide enhanced predictions on Botnet detection. This evaluation is conducted with the CTU-13 public dataset, measuring the training time of each classifier and its F measure and MCC score.
Genomic, RNA, and ecological divergences of the Revolver transposon-like multi-gene family in Triticeae
Motonori Tomita, Asuka Okutani, Avigdor Beiles, Eviatar Nevo
BMC Evolutionary Biology , 2011, DOI: 10.1186/1471-2148-11-269
Abstract: Revolver cDNAs varied between 395 and 2,182 bp in length. The first exon exhibited length variation, but the second and third exons were almost identical. These variants in the Revolver family shared the downstream region of the second intron, but varied structurally at the 5' first exon. There were 58 clones, which showed partial homology to Revolver, among 440,000 expressed sequence tagged (EST) clones sourced from Triticeae. In these Revolver homologues with lengths of 360-744 bp, the portion after the 2nd exon was conserved (65-79% homology), but the 1st exon sequences had mutually low homology, with mutations classified into 12 types, and did not have EST sequences with open reading frames (ORFs). By PCR with the 3'-flanking region of a typical genomic clone of Revolver-2 used as a single primer, rye chromosomes 1R and 5R could be simultaneously identified. Extensive eco-geographic diversity and divergence was observed among 161 genotypes of the single species Triticum dicoccoides collected from 18 populations in Israel with varying exposures to abiotic and biotic stresses (soil, temperature, altitude, water availability, and pathogens).On the base of existing differences between Revolver variants, the molecular markers that can distinguish different rye chromosomes were developed. Eco-geographic diversification of wild emmer T. dicoccoides in Israel and high Revolver copy numbers are associated with higher rainfall and biotic stresses. The remarkable quantitative differences among copy numbers of Revolver in the same species from different ecosystems suggest strong amplification activity within the last 10,000 years. It is the interesting finding because the majority of Triticeae high-copy transposable elements seem to be inactive at the recent time except for BARE-1 element in Hordeum and the fact might be interesting to perceive the processes of plant adaptive evolution.In the higher plants, only a small percentage of the genome is required for maintenance o
Dry Small Pleural Dissemination of Adenocarcinoma of the Lung Preoperatively Detected by PET/CT: A Report of Two Cases
Okutani,Daisuke,Yamane,Masaomi,Toyooka,Shinichi,Oto,Takahiro
Acta Medica Okayama , 2008,
Abstract: Dry pleural dissemination in non-small cell lung cancer, defined as solid pleural metastasis of lung cancer without pleural eff usion, is a condition occurring in T4 lung cancer. Positron emission tomography (PET) has been reported to be useful for the diagnosis and staging of lung cancer. It has been reported that positive findings on PET scans of indeterminate pleural abnormalities at computed tomography (CT) are sensitive to malignancy. We encountered two cases of dry small pleural dissemination of adenocarcinoma of the lung preoperatively detected by PET/CT. A 75-year-old man and a 66-year-old man underwent CT scan, which demonstrated solitary tumor in the lung, an enlarged mediastinal lymph node, and a small pleural nodule less than 10 mm in size, all of which were positive findings on the fluorine 18 fluorodeoxyglucose (FDG) PET portion of an integrated PET/CT. Both patients underwent thoracoscopic biopsy of the dry pleural nodule revealing dissemination of adenocarcinoma of the lung (T4). Whereas histological thoracoscopic diagnosis remains mandatory before planning treatment, our cases may suggest that PET/CT will be useful as a screening modality for dry pleural dissemination of lung cancer.
Application of Soft Tissue Artifact Compensation Using Displacement Dependency between Anatomical Landmarks and Skin Markers
Taebeum Ryu
Anatomy Research International , 2012, DOI: 10.1155/2012/123713
Abstract: Soft tissue artifact is known to be one of the main sources of errors in motion analysis by means of stereophotogrammetry. Among many approaches to reduce such errors, one is to estimate the position of anatomical landmarks during a motion with joint angle or displacement of skin markers, which is the so-called compensation method of anatomical landmarks. The position of anatomical landmarks was modeled from the data of the so-called dynamic calibration, in which anatomical landmark positions are calibrated in an ad hoc motion. This study aimed to apply the compensation methods with joint angle and skin marker displacement to three lower extremity motions (walking, sit-to-stand/stand-to-sit, and step up/down) in ten healthy males and compare their reliability. To compare the methods, two sets of kinematic variables were calculated using two different marker clusters, and the difference was obtained. Results showed that the compensation method with skin marker displacement had less differences by 30–60% compared to without compensation. In addition, it had significantly less difference in some kinematic variables (7 of 18) by 25–40% compared to the compensation method with joint angle. 1. Introduction Skin marker-based stereophotogrammetry is the most commonly used technique to analyze motions, despite significant errors due to the deformation of soft tissues such as skin and muscle. The displacement of skin markers relative to the underlying bones is called soft tissue artifact (STA), and it is responsible for errors in motion analysis. Skin marker displacement can be as much as 40?mm in the lower extremities [1, 2]. Error in computed angle due to STA ranges from 10° to 20° and is especially significant in abduction/adduction and internal/external rotation motions [1, 3, 4]. Methods proposed to reduce STA errors are based on either one of two principles: treating the STA as an independent noise irrespective of motor tasks and modeling a systematic pattern of STA in relation to motor tasks. Representatives of the first category are the studies of Challis [5], Ball and Pierrynowski [6], and Alexander and Andriacchi [7]. Challis [5] and Ball and Pierrynowski [6] made models of skin marker cluster deformation using geometric transformations, such as scaling and shearing. Alexander and Andriacchi [7] attempted to model the trajectory of skin marker displacements relative to the underlying bones using the Gaussian function. The second category includes methods that assessed task-related patterns of STA by obtaining the positions of anatomical landmark—which
STRATEGIC LOCALIZATION OF JAPANESE ENTERPRISES IN CHINA-AN EMPIRICAL APPROACH
Keikoh Ryu
Lex et Scientia , 2008,
Abstract: The last decades have been marked by an acceleration of historical and political processes, which brought essential changes in the sphere of geopolitics with ongoing consequences on economics, financial markets and international relationships, and effects on the arising of new worldwide power balance. The economic relationships were set before the foundation of the first states. Commercial relationships have had a long history and at the beginning were independent of the social and state organizations existing at the time. That is why bilateralism – as applied with reference to the relationship between two economic agents - is the oldest notion since life necessities have always implied the exchange of products. Despite these tendencies autarchy dominated economic life ever since this came into being until the great geographic discoveries and industrial revolution. Economic “coagulations” have continued in the course of time and become more prominent reaching unimaginably impenetrable levels recently, thus constituting a balance factor at regional and international level. Present evolutions confirm the old provisions concerning the indissoluble relationship between the economic and the financial monetary factor and international stability.
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