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  • 1
    Electronic Resource
    Electronic Resource
    NETWORK DESIGN OF ONE-WAY STREETS WITH SIMULATED ANNEALING (1994)
    Oxford, UK : Blackwell Publishing Ltd
    Papers in regional science 73 (1994), S. 0 
    Details
    ISSN: 1435-5957
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geography , Economics
    Notes: This paper reports on an attempt to use a simulated annealing algorithm to solve a discrete equilibrium network design model for planning one way streets in urban areas. There has been little research on applying network design techniques to the widely used traffic management strategy of one way streets, and there has been an interest in applying global search methods to large scale and difficult problems The paper explains how to develop an algorithm by following the general framework of simulated annealing for a discrete network in which a heuristic and a simulated annealing algorithm may be a useful addition to the arsenal of techniques for researchers and practitioners who wish to tackle discrete equilibrium network design problems.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1435-5597.1994.tb00606.x
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Dispersibility and Charge Property of Different Surface Modified Titanium Dioxide as Electrophoretic Particles (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Advanced materials research Vol. 11-12 (Feb. 2006), p. 563-566 
    Details
    ISSN: 1662-8985
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: To prepare stable electrophoretic ink (E Ink) contains titanium dioxide particles, oilsoluble red, dispersant and tetrachloroethylene (TCE), the modification of organic and inorganicmaterial onto the particle surface was investigated. Modified particles were characterized bymeasurement of X-ray photoelectron spectroscopy (XPS) and Fourier transform infraredspectroscopy (FT-IR) to confirm the composites and structures. The electrophoretic properties ofsample in TCE were investigated by static sedimentation experiment and electrophoresis instrument.The type of inorganic and organic materials used for the surface modification influencedispersibility and charge property of particles. On the whole, organic modified particles especiallymodified by anionic surfactant show better properties. The process conditions were investigated indetail using SDBS as the modifier. The dispersibility and charge property have significantlyimproved in optimized modifying condition that the proportion of surfactant is 15%, pH is 6 andreaction time is 1 hour which means SDBS modified TiO2 is suitable for electrophoretic particles
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/39/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.11-12.563.pdf
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  • 3
    Electronic Resource
    Electronic Resource
    Usefulness of pig-tail catheter for palliative drainage of malignant pleural effusions in cancer patients (2000)
    Springer
    Supportive care in cancer 8 (2000), S. 423-426 
    Details
    ISSN: 1433-7339
    Keywords: Key words Cancer ; Pig-tail catheter ; Pleural effusion ; Sonography
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  We retrospectively collected data from patients enrolled between 1996 and 1997, to evaluate the efficacy of sono-guided pig-tail-catheter drainage in cancer patients with large, symptomatic, amounts of malignant effusion and to evaluate the hemodynamic change after effusion drainage. A total of 477 pig-tail catheter drainage procedures were performed on 342 cancer patients. Sonographic findings, volume drained within 36 h after pig-tail insertion, heart rate and respiratory rate 24 h before and after drainage, and dyspnea sensations were recorded. We found that unilateral right-side effusion was the most frequent presentation. The mean amount of effusion drained within 36 h was 1747 ml in cancer patients. The decreases in heart rate (from 97/min to 91/min) and in respiratory rate (from 23/min to 21/min) were both statistically significant. There was no significant correlation between the amount of effusion before drainage and the heart rate or respiratory rate. The amount drained within 36 h was correlated significantly with the changes in heart and respiratory rates. Dyspnea sensations decreased or subsided in 91% of the patients within this time period. There were few complications with the pig-tail drainage procedure. Sono-guided pig-tail drainage is a safe and convenient method of effusion drainage in cancer patients. It not only provides temporary relief of symptoms from massive pleural effusions, but can also be used for pleurodesis if needed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s005200050012
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  • 4
    Electronic Resource
    Electronic Resource
    A semi-automated method for edge detection in the evaluation of left ventricular function using ECG-gated single-photon emission tomography (1994)
    Springer
    European journal of nuclear medicine 21 (1994), S. 1206-1211 
    Details
    ISSN: 1619-7089
    Keywords: Thallium-201 myocardial gated single photon emission tomography ; ECG-gated single-photon emission tomography ; Thallium-201 scintigraphy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Thallium-201 gated single-photon emission tomography (GSPET) of myocardium was performed at rest in 18 patients. Images were reconstructed to obtain end-diastolic (ED) and end-systolic (ES) images. The endocardial and epicardial edges of the left ventricle (LV) for the ED and ES images were defined for the mid-ventricular images of the short-axis slices, using a semi-automated method. LV wall thickness was measured for ED and ES images at 10° intervals. Mean LV thickness was derived as the mean of the LV thickness for the three mid-ventricular slices. The systolic thickening (ST) was derived as: mean LV thickness (ES) —mean LV thickness (ED). The systolic thickening ratio (STR) was defined as: ST/mean LV thickness (ED). LV cavity area was measured. The dilation ratio (DR) was defined as: [mean cavity area (ED) — mean cavity area (ES)]/mean cavity area (ED). LV ejection fraction (LVEF) was estimated using technetium-99m gated blood pool study. There was a linear correlation between LVEF and ST (r=0.85), LVEF and STR (r=0.77) and LVEF and DR (r=0.81). There was a strong correlation (r=0.85) between regional STR and regional percent count increase in 52 segments which did not have perfusion defects. As well as for the evaluation of myocardial perfusion, GSPET images can be of use for the assessment of LV function using an appropriate method for LV edge detection.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00182354
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  • 5
    Electronic Resource
    Electronic Resource
    Evaluation of global and regional left ventricular function using technetium-99m sestamibi ECG-gated single-photon emission tomography (1998)
    Springer
    European journal of nuclear medicine 25 (1998), S. 515-521 
    Details
    ISSN: 1619-7089
    Keywords: Key words: Technetium-99m sestamibi ; Systolic thickening ; ECG-gated single-photon emission tomography ; Left ventricular ejection fraction ; Regional wall motion
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract. We evaluated a method for the assessment of left ventricular (LV) function with technetium-99m sestamibi ECG-gated single-photon emission tomography (GSPET). GSPET was performed at rest in 21 patients. Images were reconstructed to obtain end-diastolic (ED) and end-systolic (ES) images. Endocardial and epicardial edges of the left ventricle for the ED and ES images were defined using the gradient images and the algorithm developed. LV wall thickness was measured for the mid-ventricular slices of ED and ES images at 10° intervals. The systolic thickening (ST) and the LV ejection fraction [LVEF(GSPECT)] could be determined. These values were compared with the LV ejection fraction (LVEF) estimated using the gated blood pool method. There was a linear correlation between LVEF and ST (r=0.79), and LVEF and LVEF(GSPET) (r=0.87). Histograms of LV thicknesses were generated. Agreement for evaluation of regional wall motion between the method using histograms of LV thicknesses and the gated blood pool study was 92.8% (kappa=0.75). It is concluded that with an appropriate method for LV edge detection, GSPET with 99mTc-labelled perfusion agents is of use for simultaneous evaluation of myocardial perfusion and assessment of LV function.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002590050252
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  • 6
    Electronic Resource
    Electronic Resource
    Quality control of 99mTc-labeled dextran for lymphoscintigraphy (1989)
    Springer
    European journal of nuclear medicine 15 (1989), S. 171-173 
    Details
    ISSN: 1619-7089
    Keywords: 99mTc-labeled dextran ; Lymphoscintigraphy ; Chromatography
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract 99mTc-labeled dextran has been suggested as a lymphoscintigraphic agent. However, quality-control results from previous studies have been controversial. In this study, the optimal concentration of stannous ion and pH value were determined to obtain maximal labeling. Paper and thin-layer chromatography showed total labeling efficiency as high as 98.4%. Anthrone test of the supernatant of the segments from thin-layer chromatographic strip was performed. Colorimetric determinations verified that dextran was found in the same locations as the peak radioactivty.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00253788
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