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  • 1
    Electronic Resource
    Electronic Resource
    Development of a fluorescent x-ray source for medical imaging : Proceedings of the 5th international conference on synchrotron radiation instrumentation (1995)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 66 (1995), S. 1981-1983 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A fluorescent x-ray source for medical imaging, such as K-edge subtraction angiography and monochromatic x-ray CT, has been developed. Using a 6.5 GeV accumulation ring in Tsukuba, fluorescent x rays, which range from about 30 to 70 keV are generated by irradiating several target materials. Measurements have been made of output intensities and energy spectra for different target angles and extraction angles. The intensities of fluorescent x rays at a 30 mA beam current are on the order of 1–3×106 photons/mm2/s at 30 cm from the local spot where the incident beam is collimated to 1 mm2. A phantom which contains three different contrast media (iodine, barium, gadolinium) was used for the K-edge energy subtraction, and element selective CT images were obtained. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1145776
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  • 2
    Electronic Resource
    Electronic Resource
    Case report: glomus tumour of the nasal cavity and paranasal sinuses (1998)
    Springer
    Neuroradiology 40 (1998), S. 527-529 
    Details
    ISSN: 1432-1920
    Keywords: Key words Computed tomography ; Glomus tumour ; Nasal cavity ; Sinuses ; paranasal
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Glomus tumours are relatively rare in the head and neck. We present a glomus tumour of the nasal cavity and paranasal sinuses in a 55-year-old man and describe the CT appearances of this tumour and its histopathology.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002340050640
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  • 3
    Electronic Resource
    Electronic Resource
    Stochastic Simulation of Microseisms Using Theory of Conditional Random Fields (1998)
    Springer
    Pure and applied geophysics 151 (1998), S. 81-99 
    Details
    ISSN: 1420-9136
    Keywords: Key words: Stochastic simulation, stochastic interpolation, microseisms, stationary Gaussian process, conditional random fields, nonparametric test, sign test.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract. —We examine the applicability of conditional stochastic simulation to interpretation of microseisms observed on soft soil sediments at Kushiro, Hokkaido, Japan. The theory of conditional random fields developed by Kameda and Morikawa (1994) is used, which allows one to perform interpolation of a Gaussian stochastic time-space field that is conditioned by realized values of time functions specified at some discrete locations. The applicability is examined by a blind test, that is, by comparing a set of simulated seismograms and recorded ones obtained from three-point array observa tions. A test of fitness was performed by means of the sign test. It is concluded that the method is applicable to interpretation of microseisms, and that the wave field of microseisms can be treated as Gaussian random fields both in time and space.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s000240050106
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  • 4
    Electronic Resource
    Electronic Resource
    CT imaging of biliary enteric fistula (1998)
    Springer
    Abdominal imaging 23 (1998), S. 172-176 
    Details
    ISSN: 1432-0509
    Keywords: Key words: CT—Biliary enteric fistula—Pneumobilia—Cholecystoduodenal fistula—Choledochoduodenal fistula—Cholecystocolic fistula.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract. Background: To define the signs useful for differentiating between gallbladder–enteric fistula (GB-EF) and common bile duct–enteric fistula (CBD-EF) on computed tomography (CT) because the prognosis and management of the two are different. Methods: CT scans in 13 patients with pneumobilia, who had not had surgical biliary–enteric anastomosis and endoscopic sphincterotomy, were reviewed. The presence of fistula itself, the location of air in the biliary system, and the appearance of the gallbladder were assessed. Results: The causes of pneumobilia were GB-EF in seven patients, CBD-EF in three patients, emphysematous cholecystitis (EC) in one patient, gallbladder cancer (GBC) in one patient, and incompetent sphincter of Oddi in one patient. In three of seven GB-EF patients (43%) and in none of the three CBD-EF patients (0%), the fistula itself was detected. Air was detected in the common bile duct in four of seven GB-EF (57%) and in all three CBD-EF (100%) patients, and GBC. In six of seven GB-EF (86%) and in one of three CBD-EF (33%) patients, the gallbladder was contracted. Thus, the location of air and the contraction of gallbladder were useful signs to differentiate GB-EF from CBD-EF. Conclusion: CT can distinguish between GB-EF and CBD-EF.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002619900314
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  • 5
    Electronic Resource
    Electronic Resource
    Peliosis of the spleen: splenic rupture with intraperitoneal hemorrhage (1998)
    Springer
    Abdominal imaging 23 (1998), S. 201-202 
    Details
    ISSN: 1432-0509
    Keywords: Key words: CT—Spleen—Peliosis—Rupture.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract. Peliosis is a rare disease that is characterized by multiple blood-filled cystic spaces. We report the computed tomographic findings of splenic rupture secondary to splenic peliosis in a patient receiving anabolic steroids for aplastic anemia.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002619900323
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  • 6
    Electronic Resource
    Electronic Resource
    Ping-pong ball avalanche at a ski jump (1998)
    Springer
    Archive for history of exact sciences 1 (1998), S. 51-56 
    Details
    ISSN: 1432-0657
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Natural Sciences in General
    Notes: Abstract Three dimensional granular flow experiments were carried out on a ski jump with 300,000 ping-pong balls. Since the air drag was a large effect, the flow arrived at a steady state within a short distance. The terminal velocities attained showed a remarkable increase with the number of released balls. In addition, the flow formed a distinct head and tail structure, which has often been observed in large-scale geophysical flows in nature. Similarity analysis is used to show that the experiment corresponds to a natural snow avalanche that runs for several kilometers. Video cameras positioned above the flow allowed the measurement of the location and the distance of a single ball, which finally led to the particle velocity profiles. The static pressure depression measurements in and above the flow showed the air velocity profiles and suggested the strong interaction between the balls and the surrounding fluid(air). Computer simulation of 3-dimensional, inhomogeneous two-phase flows that uses the DEM for the particles and the Reynolds-averaged Navier Stokes equations for the fluid are currently in progress.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/PL00010911
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  • 7
    Electronic Resource
    Electronic Resource
    Correlation between terbium and the other rare earth element contents in fern leaves (1998)
    Springer
    Journal of radioanalytical and nuclear chemistry 236 (1998), S. 35-38 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The lanthanides (REEs) in 142 fern leaves collected from 9 sampling sites in Japan were analyzed by instrumental neutron activation analysis. Between two REEs a strong positive correlation was found in the logarithmic scattering diagram with correlation and regression coefficients close to unity, suggesting neither selective accumulation by plants nor different availability from soil between the two elements. However, between Tb and the other REEs the relationship showed two lines with the same correlation coefficient. This suggested that there must be a difference in the availability of REEs or in their absorption characteristics by plants. Further analysis revealed that the splitting was due to some difference in the environmental factors where the fern grew. However, the amount of REE in the soil collected together with the corresponding fern did not reflect the REE concentration in the fern leaves.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02386314
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  • 8
    Electronic Resource
    Electronic Resource
    Conidial surface ultrastructure of human-pathogenic and saprobicCladosporium species (1995)
    Springer
    Antonie van Leeuwenhoek 68 (1995), S. 51-55 
    Details
    ISSN: 1572-9699
    Keywords: Cladosporium ; conidial surface ; conidial ultrastructure ; freeze-fracturing ; pathogenic species ; rodlets
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Freeze-fracturing of outer wall layers ofCladosporium conidia revealed two types of ultrastructure, coinciding with taxonomic characteristics. The outer conidial layers were essentially smooth in the human pathogenic species,C. bantianum, C. carrionii, andC. trichoides. In contrast, mosaic arrays of rodlets on conidia were observed with freeze-fracturing in the saprobic species,C. cladosporioides, C. coralloides, C. herbarum, C. sphaerospermum, andC. variabile. Conidia ofC. elatum were an exception among the saprobic species as they had smooth surfaces. The present study supports the suggestion that the human pathogenicCladosporium species should be transferred to another genus.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00873292
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  • 9
    Electronic Resource
    Electronic Resource
    Mitochondrial DNA analysis ofExophiala spinifera (1995)
    Springer
    Mycopathologia 131 (1995), S. 67-70 
    Details
    ISSN: 1573-0832
    Keywords: Exophiala spinifera ; Mitochondrial DNA ; Restriction fragment length polymorphism
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Restriction fragment length polymorphism (RFLP) of mitochondrial DNA (mtDNA) was examined in 36 isolates ofExophiala spinifera (8 isolates from Brazil, 9 from China, 15 from Columbia, 1 from the United States and 2 from Venezuela).E. spinifera isolates displayed a high degree of mtDNA diversity in RFLP patterns and were clustered into six genetically heterogeneous groups (Group 1 through Group 6). Isolates of Group 2 including the type strain seemed to have a worldwide distribution. RFLP patterns ofE. spinifera were also distinct from those of other dematiaceous fungi, such asE. jeanselmei, E. moniliae, E. dermatitidis, Fonsecaea pedrosoi, Cladosporium carrionii andPhialophora verrucosa. These results indicate thatE. spinifera may be a taxonomic complex and that RFLP patterns will be useful in the identification, typing and epidemiology of theE. spinifera variants.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01102880
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  • 10
    Electronic Resource
    Electronic Resource
    Measurements of powder snow avalanche- nature - (1995)
    Springer
    Surveys in geophysics 16 (1995), S. 649-660 
    Details
    ISSN: 1573-0956
    Keywords: Powder snow avalanche ; growth rate of snow cloud ; air movement ; suspension criterion
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract Snow cloud growth rates of powder snow avalanche were obtained with analysing the pictures recorded in Ryggfonn, Norway. Although results showed wide scattering, as far as the data obtained in runout zone are concerned, they roughly agreed with the water tank experiments by Beghin and Olagne (1991). Air movement in snow avalanche cloud was measured with an ultra-sonic anemometer in Kurobe Canyon, Japan. It showed rising current existed near the front and downward at the trail. Comparing with drifting snow threshold and particle suspension criterion, entrainment, suspension and deposition of snow particles in the snow cloud were discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00665745
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