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  • 1
    Electronic Resource
    Electronic Resource
    A RISK-BASED APPROACH FOR FLOOD CONTROL OPERATION OF A MULTIPURPOSE RESERVOIR (1992)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of the American Water Resources Association 28 (1992), S. 0 
    Details
    ISSN: 1752-1688
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying , Geography
    Notes: : Many approaches are available for operation of a multipurpose reservoir during flood season; one of them is allocation of storage space for flood control. A methodology to determine a reservoir operation policy based on explicit risk consideration is presented. The objective of the formulation is to maximize the reservoir storage at the end of a flood season while ensuring that the risk of an overflow is within acceptable limits. The Dynamic Programming technique has been used to solve the problem. This approach has been applied to develop operation policies for an existing reservoir. The performance of the policy was evaluated through simulation and was found to be satisfactory.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1752-1688.1992.tb04015.x
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  • 2
    Electronic Resource
    Electronic Resource
    ECR ion source using slow wave structures : Proceedings of the fourth International Conference on Ion Sources (1992)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 63 (1992), S. 2525-2528 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: In this ECR ion source, the possibility of maintaining the plasma by slow wave structures (SWS), helical coil, and slotted line antennas, in the region where wce, wpe (very-much-greater-than) wrf (wce, wpe, and wrf are electron cyclotron, plasma, and microwave frequencies, respectively) is exploited. The plasma parameters, plasma density, and electron temperature are maximized by coupling microwave (frequency: 2.45 GHz; power: 650 W) at two places in a magnetic mirror machine (mirror ratio Rm (approximately-equal-to) 1.45) to obtain higher beam current. Initially, the plasma is produced by coupling microwave to SWS at the mirror throat. The microwave is coupled by exciting the dominant slow wave field component of SWS, using an E-plane horn antenna. Then the plasma is brought to the region wce, wpe (very-much-greater-than) wrf at the mirror throat by increasing the magnetic field. Simultaneously, the ECR region is shifted from mirror throat to the center where second microwave coupling is done at the resonant region using another horn antenna. The characterization of plasma parameters are presented for both helical coil and slotted line antennas. Enhancement of plasma parameters are observed in the present scheme. Also, the SLA is found to produce better plasmas (ne ∼ 7 × 1012 cm−3 and Te ∼ 12 eV) than the helical coil and hence the SLA is chosen for the ion beam characterization. The extracted ion beam current density in the present scheme is ∼25 mA/cm2 at 2-kV extraction voltage.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1142877
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  • 3
    Electronic Resource
    Electronic Resource
    E-plane horn excitation of slow wave structures for obtaining high-density electron cyclotron resonance plasmas (1992)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 63 (1992), S. 1939-1944 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: This paper describes a new method of exciting slow wave structures (SWS) for obtaining high-density electron cyclotron resonance plasmas. The electric field component corresponding to the slow wave mode (SWM) of SWS is excited by an E-plane horn antenna. The special features of the microwave transmission line are the stable tuning for a given antenna and no requirement for water cooling on any of the components. Two types of SWS, a helical coil and a slotted line antenna, are studied, and the experiments are carried out in nitrogen and argon. The plasma producing capability is examined for these systems in the region wce,wpe(approximately-greater-than)wrf, where wce, wpe, and wrf correspond to electron cyclotron, plasma, and microwave frequencies, respectively. A high-density, large-diameter plasma (n0∼5×1011 cm−3; diameter ∼8.0 cm) could be obtained and the plasma could be maintained in the region 1≤wce/wrf≤2.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1143308
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  • 4
    Electronic Resource
    Electronic Resource
    Genetics of New Crop Genus Limnanthes I. Five Morphological Marker Loci in L. alba × L. gracilis Progenies (1992)
    Oxford, UK : Blackwell Publishing Ltd
    Plant breeding 109 (1992), S. 0 
    Details
    ISSN: 1439-0523
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: New crop development often depends on a few essential traits such as nonshattering of seed at maturity and pollination control. In order to domesticate Limnanthes alba (meadowfoam), as a source of industrial oil, we performed genetic analysis of crosses between L. alba and its closest relative Limnanthes gracilis var. gracilis which shows higher selfing ability and nutlet abscission. Differences in pubescence, nutlet abscission, and seedling pigmentation were each found to be governed primarily by a single locus; two interacting loci appeared to control capsule dehiscence. Segregation distortion was detected for pigmentation in F2 and F3 populations, and for pubescence in several F3 families. Loci controlling pubescence, nutlet abscission, and capsule dehiscence resided in a single linkage block which assorted independently of the locus controlling pigmentation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1439-0523.1992.tb00173.x
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  • 5
    Electronic Resource
    Electronic Resource
    Determination of trace amounts of morpholine and its thermal degradation products in boiler water by HPLC (1993)
    Springer
    Chromatographia 35 (1993), S. 173-176 
    Details
    ISSN: 1612-1112
    Keywords: Column liquid chromatography ; Pre-column derivatisation ; Morpholine and degradation products ; Boiler feed water
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary Morpholine and its amine-type thermal degradation products present in boiler feed water and steam condensate were derivatised with N-succinimidyl-p-nitrophenylacetate. These pre-column derivatives were determined by high-performance liquid chromatography with UV detection at 280 nm. The analytical column was Supelco-sil-ODS with an isocratic mobile phase. Morpholine and its breakdown products were monitored in the range 0.01–10 μg ml−1 with a relative standard deviation of 0.4–3.0%. Chromatographic analysis of boiler feed water and steam condensate samples collected from a boiler servicing a petroleum refinery is described.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02269698
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  • 6
    Electronic Resource
    Electronic Resource
    Female frequencies and fitness components between sex phenotypes among gynodioecious populations of the colonizing species Trifolium hirtum All. in California (1992)
    Springer
    Oecologia 92 (1992), S. 279-286 
    Details
    ISSN: 1432-1939
    Keywords: Colonizing species ; Ecological genetics ; Gynodioccy ; Sex ratio ; Trifolium hirtum
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Male sterility has been recently discovered in Californian populations of rose clover (Trifolium hirtum). This study describes the frequency distribution of male sterility in Turkish and Californian populations, and compares fitness components of hermaphrodites and females. As male-steriles were found in Turkey, it is likely that they were introduced to California during the 1940's with the original material derived from Turkey. The spread of male-sterile genotypes in California has given rise to an asymmetrical frequency distribution of male sterility with positive skewness. The frequency of females has not exceeded fifty percent and it appears to be temporally stable in most of the Californian populations. The hypothesis that female frequencies and fitness differences between phenotypes are correlated was tested by comparing sex phenotypes in seven populations with contrasting levels of male sterility. The analysis of those populations showed no evidence for such a correlation as no significant differences were found between sex phenotypes for fecundity and seed germination. The hypothesis that females are maintained due to fitness differences in the progeny of hermaphrodites and females was experimentally tested in the population with maximum frequency of male-steriles. The results showed no significant differences in the demographic performance of the progenies of hermaphrodites and females. The present results are discussed in terms of the possible mechanism of maintenance of gynodioecy in rose clover.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00317376
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  • 7
    Electronic Resource
    Electronic Resource
    Breeding systems of hermaphroditic and gynodioecious populations of the colonizing species Trifolium hirtum All. in California (1992)
    Springer
    Theoretical and applied genetics 84 (1992), S. 155-160 
    Details
    ISSN: 1432-2242
    Keywords: Gynodioecy ; Colonizing species ; Mating system ; Isozymes ; Population structure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary A multilocus procedure was used to estimate outcrossing rates in ten roadside populations of Trifolium hirtum in California. Three groups of populations were studied: cultivars, hermaphroditic, and gynodioecious (sexually dimorphic) populations. The multilocus outcrossing rate (tm) varied from 0.05 to 0.43 among populations. Population level tm estimates were significantly correlated with the observed heterozygosity in gynodioecious populations but not in hermaphroditic populations. The outcrossing rate of hermaphrodites and females was estimated in three gynodioecious populations; the estimates of tm varied from 0.09 to 0.23 for hermaphrodites and from 0.73 to 0.80 for females. The distribution of outcrossing rates in gynodioecious populations is bimodal. Our results indicate that for the levels of selfing observed among hermaphrodites, inbreeding depression is likely to be a major factor in the maintenance of females in gynodioecious populations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00223995
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  • 8
    Electronic Resource
    Electronic Resource
    Spatio-temporal fluctuations in HeI 10830 Å line parameters: Evidence for spicule formation (1992)
    Springer
    Solar physics 138 (1992), S. 107-121 
    Details
    ISSN: 1573-093X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The equivalent width, line depth, line width, and Doppler shift of the He i 10830 Å line were extracted from two time series of spectra. Scatter plots of time-averaged line depth, line width, and Doppler shifts, as well as the root mean square temporal fluctuation of these quantities against the time-averaged equivalent width at a few hundred spatial locations were obtained. The statistical behaviour of these line parameters and their fluctuations was used to infer plausible reasons for the fluctuations. Examination of these results showed that the line parameter fluctuations could be caused by fluctuations in the coronal UV radiation (which could drive the spicules) or by the appearance of density inhomogeneities such as spicules within the line forming domain. In either case, the data can be interpreted as representing the initial phases of spicules.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00146199
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  • 9
    Electronic Resource
    Electronic Resource
    Time variability of the Hei 10830 Å line profile (1994)
    Springer
    Solar physics 150 (1994), S. 49-59 
    Details
    ISSN: 1573-093X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We have studied the time-dependent behaviour of the Hei 10830 Å line. These studies show that (i) the fluctuations of the line width are uncorrelated with the equivalent-width fluctuations and (ii) the autocorrelation curves for the equivalent-width fluctuations are broader than those for line-width fluctuations. These results could be interpreted as the signatures of the eruption of density inhomogeneities, like spicules, into the altitudes of formation of the Hei 10830 Å line.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00712875
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  • 10
    Electronic Resource
    Electronic Resource
    Inheritance of male sterility in Trifolium hirtum All (1992)
    Springer
    Genetica 85 (1992), S. 153-161 
    Details
    ISSN: 1573-6857
    Keywords: Gynodioecy ; inheritance of male sterility ; nucleocytoplasmic differentiation ; Trifolium hirtum
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The inheritance of male sterility was studied using a set of intra and interpopulation crosses from Californian populations of rose clover (Trifolium hirtum All.). The F2 gave higher frequencies of male steriles in interpopulation crosses than in intrapopulation crosses. Several F2 families gave ratios that were compatible with models of two and three complementary genes. However, the frequency distribution of male sterility among F3 families rejected such models. Given that single and two gene models were rejected, we interpret the results using a cytoplasmic-nuclear model with more than two restorer loci which is at least consistent with the observed results.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00120322
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