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  • SAGE Publications  (7)
  • 2000-2004  (7)
  • 1
    Online Resource
    Online Resource
    On the prediction of chip flow angle in non-free oblique machining
    SAGE Publications ; 2004
    In:  Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture Vol. 218, No. 10 ( 2004-10-01), p. 1267-1278
    Details
    In: Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture, SAGE Publications, Vol. 218, No. 10 ( 2004-10-01), p. 1267-1278
    Abstract: A new method for predicting the chip flow angle of inserts with different cutting conditions was studied in non-free oblique machining process. The effects of the major cutting edge, minor cutting edge, corner radius and cutting parameters (depth of cut and feed rate) on the chip flow direction were studied by calculating the components of the thrust cutting force for the major and minor cutting edges based on the hypothesis that the chip flow direction is also the thrust force direction. This method was verified by comparing the calculated and experimental results with the single-point and nose-radiused cutting edge for different cutting conditions. The prediction results under different cutting parameters show good agreement with experimental data.
    Type of Medium: Online Resource
    ISSN: 0954-4054 , 2041-2975
    URL: Article
    DOI: 10.1243/0954405042323540
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2004
    detail.hit.zdb_id: 2032745-6
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  • 2
    Online Resource
    Online Resource
    Clonal Expansion of Hepatic Stem/Progenitor Cells following Flow Cytometric Cell Sorting
    SAGE Publications ; 2001
    In:  Cell Transplantation Vol. 10, No. 4-5 ( 2001-05), p. 393-396
    Details
    In: Cell Transplantation, SAGE Publications, Vol. 10, No. 4-5 ( 2001-05), p. 393-396
    Abstract: Although hepatic stem cells are believed to exist and play a critical role in developing and regenerating liver, little is known about their cell surface specificity or differentiation capabilities. To make prospective studies of hepatic stem cells possible, we established an in vitro culture system for identification and characterization of hepatic stem/progenitor cells. By combining this culture system with fluorescence activated cell sorting (FACS), a population of cells that were capable of forming large colonies and providing their descendants for relative longer period was isolated from fetal mouse livers. These data suggest that hepatic stem/progenitor cells with high proliferative potential are existent in the developing mouse liver, and that they are enriched by using flow cytometry.
    Type of Medium: Online Resource
    ISSN: 0963-6897 , 1555-3892
    URL: Article
    DOI: 10.3727/000000001783986602
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2001
    detail.hit.zdb_id: 2020466-8
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  • 3
    Online Resource
    Online Resource
    Lung Perfusion with Oxygenated Blood during Aortic Clamping Prevents Lung Injury
    SAGE Publications ; 2004
    In:  Asian Cardiovascular and Thoracic Annals Vol. 12, No. 1 ( 2004-03), p. 58-60
    Details
    In: Asian Cardiovascular and Thoracic Annals, SAGE Publications, Vol. 12, No. 1 ( 2004-03), p. 58-60
    Abstract: To evaluate the protective effect of continuous pulmonary perfusion with oxygenated blood during aortic crossclamping, 12 mixed-breed piglets (7–12 kg) were placed on cardiopulmonary bypass for 130 minutes. An experiment group of 6 (group E) had continuous pulmonary perfusion with oxygenated blood during cardiopulmonary bypass, while the other 6 served as controls (group C). Pulmonary function was measured at the beginning and end of cardiopulmonary bypass and one hour later. Histology was compared before and after cardiopulmonary bypass. Pulmonary function after cardiopulmonary bypass was significantly better in group E than group C. There was preservation of the normal pulmonary parenchyma in group E, whereas group C had marked intra-alveolar edema and abundant intra-alveolar neutrophils. Anoxia of lung tissue during aortic crossclamping on cardiopulmonary bypass is probably the major factor in lung injury. Continuous pulmonary perfusion was effective in preventing lung injury during aortic crossclamping.
    Type of Medium: Online Resource
    ISSN: 0218-4923 , 1816-5370
    URL: Article
    DOI: 10.1177/021849230401200114
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2004
    detail.hit.zdb_id: 2044527-1
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  • 4
    Online Resource
    Online Resource
    An improved chip flow model considering cutting geometry variations based on the equivalent cutting edge method
    SAGE Publications ; 2003
    In:  Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture Vol. 217, No. 12 ( 2003-12-01), p. 1737-1745
    Details
    In: Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture, SAGE Publications, Vol. 217, No. 12 ( 2003-12-01), p. 1737-1745
    Abstract: An improved chip flow model of a nose-radiused cutting tool in oblique turning is developed considering cutting geometry variations based on the equivalent cutting edge method. The model-building procedure divided the arbitrary cutting area engaged with workpiece into a single edge and a nose-radiused cutting edge according to the depth of cut and tool nose radius. The individual effects on the chip flow angle are distinguished by the equivalent cutting edge method and the total chip flow angle obtained. The chip flow angle prediction results obtained under different cutting parameters show good agreement with experimental data.
    Type of Medium: Online Resource
    ISSN: 0954-4054 , 2041-2975
    URL: Article
    DOI: 10.1243/095440503772680659
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2003
    detail.hit.zdb_id: 2032745-6
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  • 5
    Online Resource
    Online Resource
    Video-Assisted Thoracoscopic Surgery for Congenital Heart Disease
    SAGE Publications ; 2002
    In:  Asian Cardiovascular and Thoracic Annals Vol. 10, No. 3 ( 2002-09), p. 228-230
    Details
    In: Asian Cardiovascular and Thoracic Annals, SAGE Publications, Vol. 10, No. 3 ( 2002-09), p. 228-230
    Abstract: We report our experience with video-assisted thoracoscopy in the surgical closure of heart septal defects. Nine patients, aged 10 to 26 years, underwent operation for closure of an atrial septal defect; and 3, aged 10 to 22 years, for closure of a ventricular septal defect. Three minithoracotomies with a diameter of 2 to 3 cm were made in the fourth intercostal space of the right parasternum and the fourth and seventh intercostal spaces of the right middle axillary line, respectively. Through the openings and guided by a thoracoscope, a catheter was inserted into the superior vena cava, femorofemoral extracorporeal circulation was built, the aorta was crossclamped, and the myocardium was protected by cold cardioplegia. The right atrium was opened, and the defect was exposed with a traction suture. Primary closure of defects was performed successfully in all patients. The duration of aortic crossclamping and extracorporeal circulation ranged from 11 to 56 minutes and from 50 to 168 minutes, respectively. Postoperatively, cardiac murmur disappeared and echocardiograms showed no residual shunt. Repair of heart septal defects can be completely done with the assistance of video-assisted thoracoscopy, offering a new option with minimal incision.
    Type of Medium: Online Resource
    ISSN: 0218-4923 , 1816-5370
    URL: Article
    DOI: 10.1177/021849230201000308
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2002
    detail.hit.zdb_id: 2044527-1
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  • 6
    Online Resource
    Online Resource
    The Psychology of E-Learning: A Field of Study
    SAGE Publications ; 2003
    In:  Journal of Educational Computing Research Vol. 29, No. 3 ( 2003-10), p. 285-296
    Details
    In: Journal of Educational Computing Research, SAGE Publications, Vol. 29, No. 3 ( 2003-10), p. 285-296
    Abstract: In this article, we present our views of the psychology of E-learning as a field of study that is important, interdisciplinary, emerging, and promising. We first define E-learning as the third learning system in the history of human learning, specify two major E-learning practices in education and corporations, and indicate the importance of psychological studies of E-learning. We then point out the interdisciplinary nature of the psychology of learning and summarize the existing literature of the psychology of E-learning in cognitive, social, developmental, and school and counseling psychology. We comment on major accomplishments and limitations of the special issue, and conclude with a brief discussion of possible future research directions.
    Type of Medium: Online Resource
    ISSN: 0735-6331 , 1541-4140
    URL: Article
    DOI: 10.2190/D0MU-61Y8-BCRJ-2881
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2003
    detail.hit.zdb_id: 55234-3
    detail.hit.zdb_id: 2071875-5
    SSG: 5,3
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  • 7
    Online Resource
    Online Resource
    Clonogenic Colony-Forming Ability of Flow Cytometrically Isolated Hepatic Progenitor Cells in the Murine Fetal Liver
    SAGE Publications ; 2000
    In:  Cell Transplantation Vol. 9, No. 5 ( 2000-09), p. 697-700
    Details
    In: Cell Transplantation, SAGE Publications, Vol. 9, No. 5 ( 2000-09), p. 697-700
    Abstract: Stem cells are defined as cells having multilineage differentiation potential and self-renewal capability. Hepatic stem cells have aroused considerable interest not only because of their developmental importance but also for their therapeutic potential. However, their presence in the liver has not yet been demonstrated. With the use of a fluorescence-activated cell sorter (FACS) and monoclonal antibodies, we attempted to ascertain whether hepatic stem cells are present in the murine fetal liver. For this purpose, we optimized a cell isolation technique for FACS sorting of fetal liver cells. When isolated CD45 – TER119 – cells (the non-blood cell fraction in the fetal liver) were tested for their clonogenic colony-forming ability, mechanical dissociation (pipetting) was the most suitable cell isolation technique for FACS sorting. We confirmed that these colonies contained not only cells expressing hepatocyte markers but also cells expressing cholangiocyte markers. To identify hepatic stem cells, studies must focus on CD45 – TER119 – cells in the murine fetal liver.
    Type of Medium: Online Resource
    ISSN: 0963-6897 , 1555-3892
    URL: Article
    DOI: 10.1177/096368970000900517
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2000
    detail.hit.zdb_id: 2020466-8
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