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  • 1
    Electronic Resource
    Electronic Resource
    Reducing the consumption of iron in smelting steel in converters (1973)
    Springer
    Metallurgist 17 (1973), S. 807-807 
    Details
    ISSN: 1573-8892
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01089517
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Degree of oxidation of the final slag in the smelting of low-carbon converter steel (1974)
    Springer
    Metallurgist 18 (1974), S. 524-525 
    Details
    ISSN: 1573-8892
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01286784
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Determining the fusing points of fettling and ramming mixes for the hearth of the basic open-hearth furnace (1963)
    Springer
    Refractories and industrial ceramics 4 (1963), S. 565-567 
    Details
    ISSN: 1573-9139
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Conclusions It was shown to be possible to use an ordinary laboratory electric furnace of the Tamman type for determining the fusion temperature of highly refractory materials up to 2500°C in neutral atmospheres. The method developed yields an objective evaluation of the refractoriness of specimens of rammed and fettled basic open hearth linings and can be used for research work carried out to increase the life of basic linings of steelmelting furnaces.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01290695
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    Paper (German National Licenses)
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  • 4
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    The Secondary Emission from a Nickel Surface due to Slow Positive Ion Bombardment (1925)
    American Physical Society
    Details
    Publication Date: 1925-12-01
    Print ISSN: 0031-899X
    Electronic ISSN: 1536-6065
    Topics: Physics
    Published by American Physical Society
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    PAPER CURRENT
  • 5
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    Efficacy of anticoagulation in resolving left atrial and left atrial appendage thrombi: A transesophageal echocardiographic study (2000)
    In:  Other Sources
    Details
    Publication Date: 2011-08-24
    Description: BACKGROUND: Transesophageal echocardiography (TEE) is the gold standard for evaluation of the left atrium and the left atrial appendage (LAA) for the presence of thrombi. Anticoagulation is conventionally used for patients with atrial fibrillation to prevent embolization of atrial thrombi. The mechanism of benefit and effectiveness of thrombi resolution with anticoagulation is not well defined. METHODS AND RESULTS: We used a TEE database of 9058 consecutive studies performed between January 1996 and November 1998 to identify all patients with thrombi reported in the left atrium and/or LAA. One hundred seventy-four patients with thrombi in the left atrial cavity (LAC) and LAA were identified (1.9% of transesophageal studies performed). The incidence of LAA thrombi was 6.6 times higher than LAC thrombi (151 vs 23, respectively). Almost all LAC thrombi were visualized on transthoracic echocardiography (90.5%). Mitral valve pathology was associated with LAC location of thrombi (P 〈.0001), whereas atrial fibrillation or flutter was present in most patients with LAA location of thrombi. Anticoagulation of 47 +/- 18 days was associated with thrombus resolution in 80.1% of the patients on follow-up TEE. Further anticoagulation resulted in limited additional benefit. CONCLUSIONS: LAC thrombi are rare and are usually associated with mitral valve pathology. Transthoracic echocardiography is effective in identifying these thrombi. LAA thrombi occur predominantly in patients with atrial fibrillation or flutter. Short-term anticoagulation achieves a high rate of resolution of LAA and LAC thrombi but does not obviate the need for follow-up TEE.
    Keywords: Life Sciences (General)
    Type: American heart journal (ISSN 0002-8703); Volume 140; 1; 150-6
    Format: text
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    NASA TECHNICAL REPORTS
  • 6
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    Assessment of diastolic function by tissue Doppler echocardiography: comparison with standard transmitral and pulmonary venous flow (1999)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: The objective of this study was to determine the utility of Doppler tissue echocardiography in the evaluation of diastolic filling and in discriminating between normal subjects and those with various stages of diastolic dysfunction. We measured myocardial velocities in 51 patients with various stages of diastolic dysfunction and in 27 normal volunteers. The discriminating power of each of the standard Doppler indexes of left ventricular filling, pulmonary venous flow, and myocardial velocities was determined with the use of Spearman rank correlation and analysis of variance F statistics. Early diastolic myocardial velocity (E(m)) was higher in normal subjects (16.0 +/- 3.8 cm/s) than in patients with either delayed relaxation (n = 15, 7.5 +/- 2.2 cm/s), pseudonormal filling (n = 26, 7.6 +/- 2.3 cm/s), or restrictive filling (n = 10, 7.4 +/- 2.4 cm/s, P 〈.0001). E(m ) was the best single discriminator between control subjects and patients with diastolic dysfunction (P =.7, F = 64.5). Myocardial velocities assessed by Doppler tissue echocardiography are useful in differentiating patients with normal from those with abnormal diastolic function. Myocardial velocity remains reduced even in those stages of diastolic dysfunction characterized by increased preload compensation.
    Keywords: Life Sciences (General)
    Type: Journal of the American Society of Echocardiography : official publication of the American Society of Echocardiography (ISSN 0894-7317); 12; 8; 609-17
    Format: text
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    NASA TECHNICAL REPORTS
  • 7
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    Internet-based transfer of cardiac ultrasound images (2000)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: A drawback to large-scale multicentre studies is the time required for the centralized evaluation of diagnostic images. We evaluated the feasibility of digital transfer of echocardiographic images to a central laboratory for rapid and accurate interpretation. Ten patients undergoing trans-oesophageal echocardiographic scanning at three sites had representative single images and multiframe loops stored digitally. The images were analysed in the ordinary way. All images were then transferred via the Internet to a central laboratory and reanalysed by a different observer. The file sizes were 1.5-72 MByte and the transfer rates achieved were 0.6-4.8 Mbit/min. Quantitative measurements were similar between most on-site and central laboratory measurements (all P 〉 0.25), although measurements differed for left atrial width and pulmonary venous systolic velocities (both P 〈 0.05). Digital transfer of echocardiographic images and data to a central laboratory may be useful for multicentre trials.
    Keywords: Life Sciences (General)
    Type: Journal of telemedicine and telecare (ISSN 1357-633X); 6; 3; 168-71
    Format: text
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    NASA TECHNICAL REPORTS
  • 8
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    New Doppler echocardiographic applications for the study of diastolic function (1998)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Doppler echocardiography is one of the most useful clinical tools for the assessment of left ventricular (LV) diastolic function. Doppler indices of LV filling and pulmonary venous (PV) flow are used not only for diagnostic purposes but also for establishing prognosis and evaluating the effect of therapeutic interventions. The utility of these indices is limited, however, by the confounding effects of different physiologic variables such as LV relaxation, compliance and filling pressure. Since alterations in these variables result in changes in Doppler indices of opposite direction, it is often difficult to determine the status of a given variable when a specific Doppler filling pattern is observed. Recently, color M-mode and tissue Doppler have provided useful insights in the study of diastolic function. These new Doppler applications have been shown to provide an accurate estimate of LV relaxation and appear to be relatively insensitive to the effects of preload compensation. This review will focus on the complementary role of color M-mode and tissue Doppler echocardiography and traditional Doppler indices of LV filling and PV flow in the assessment of diastolic function.
    Keywords: Life Sciences (General)
    Type: Journal of the American College of Cardiology (ISSN 0735-1097); 32; 4; 865-75
    Format: text
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    NASA TECHNICAL REPORTS
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