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  • 1
    Online Resource
    Online Resource
    Correlation of Seed Weight and Nurserybed Traits with 5-, 10-, and 15-Year Volumes in a Loblolly Pine Progeny Test
    Oxford University Press (OUP) ; 1979
    In:  Forest Science Vol. 25, No. 4 ( 1979-12-01), p. 591-596
    Details
    In: Forest Science, Oxford University Press (OUP), Vol. 25, No. 4 ( 1979-12-01), p. 591-596
    Abstract: Seed weight and nurserybed traits of loblolly pine families measured in detail in 1958 were compared to volumes attained 5, 10, and 15 years after outplanting. Three out of eight characteristics showed significant correlations. These were: (1) percent of seedlings within a family with distinct terminal buds in December, (2) percent of seedlings within a family without basal branches and (3) seed weight. A multiple regression was developed using two of these characteristics to predict volume at age 15. Although the regression R² value was low, a genetic gain of 8.0 percent could have been realized by selecting the best 20 percent of the families from the nurserybed. Forest Sci. 25:591-596.
    Type of Medium: Online Resource
    ISSN: 0015-749X , 1938-3738
    URL: Article
    DOI: 10.1093/forestscience/25.4.591
    Language: English
    Publisher: Oxford University Press (OUP)
    Publication Date: 1979
    detail.hit.zdb_id: 2043866-7
    SSG: 23
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  • 2
    Online Resource
    Online Resource
    Insecticides for Seed Orchards—A Case Study in Applied Research
    Oxford University Press (OUP) ; 1981
    In:  Southern Journal of Applied Forestry Vol. 5, No. 1 ( 1981-02-01), p. 33-37
    Details
    In: Southern Journal of Applied Forestry, Oxford University Press (OUP), Vol. 5, No. 1 ( 1981-02-01), p. 33-37
    Abstract: In 1973 the control of cone and seed insects was the most serious problem facing the seed orchard manager, but no pesticides were registered for that particular use. The Southern Seed Orchard Pest Committee was formed to address itself to this problem. Through a cooperative effort of industry, universities, state, and federal organizations, some of the major problems were solved and registration of two insecticides obtained in slightly less than three years.
    Type of Medium: Online Resource
    ISSN: 0148-4419 , 1938-3754
    URL: Article
    DOI: 10.1093/sjaf/5.1.33
    Language: English
    Publisher: Oxford University Press (OUP)
    Publication Date: 1981
    detail.hit.zdb_id: 2043998-2
    SSG: 23
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  • 3
    Online Resource
    Online Resource
    Traits Measured on Seedlings Can Be Used to Select for Later Volume of Loblolly Pine
    Oxford University Press (OUP) ; 1984
    In:  Southern Journal of Applied Forestry Vol. 8, No. 1 ( 1984-02-01), p. 59-63
    Details
    In: Southern Journal of Applied Forestry, Oxford University Press (OUP), Vol. 8, No. 1 ( 1984-02-01), p. 59-63
    Abstract: Seed was collected from individual trees in loblolly pine (Pinus taeda L.) stands in southeast Texas. Although selection on seed characteristics proved ineffective as an indirect selection method for improving five-year volume, selection for seedling characteristics prior to outplanting proved very effective. Families selected in greenhouse and nursery beds averaged 36 percent greater volume after five years in the field than checklots from the same stands. Seed from the southernmost stands produced more volume than seed from more northern stands. Seed weights of selected families were significantly greater than those of appropriate checks.
    Type of Medium: Online Resource
    ISSN: 0148-4419 , 1938-3754
    URL: Article
    DOI: 10.1093/sjaf/8.1.59
    Language: English
    Publisher: Oxford University Press (OUP)
    Publication Date: 1984
    detail.hit.zdb_id: 2043998-2
    SSG: 23
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  • 4
    Online Resource
    Online Resource
    Investigation of Flow Characteristics in Lean Direct Injection Combustors
    American Institute of Aeronautics and Astronautics (AIAA) ; 2012
    In:  Journal of Propulsion and Power Vol. 28, No. 1 ( 2012-01), p. 181-196
    Details
    In: Journal of Propulsion and Power, American Institute of Aeronautics and Astronautics (AIAA), Vol. 28, No. 1 ( 2012-01), p. 181-196
    Type of Medium: Online Resource
    ISSN: 0748-4658 , 1533-3876
    URL: Article
    DOI: 10.2514/1.B34264
    Language: English
    Publisher: American Institute of Aeronautics and Astronautics (AIAA)
    Publication Date: 2012
    detail.hit.zdb_id: 2025913-X
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  • 5
    Online Resource
    Online Resource
    Optimization of a Centrifugal Compressor Impeller for Robustness to Manufacturing Uncertainties
    ASME International ; 2016
    In:  Journal of Engineering for Gas Turbines and Power Vol. 138, No. 11 ( 2016-11-01)
    Details
    In: Journal of Engineering for Gas Turbines and Power, ASME International, Vol. 138, No. 11 ( 2016-11-01)
    Abstract: Compressor impellers for mass-market turbochargers are die-casted and machined with an aim to achieve high dimensional accuracy and acquire specific performance. However, manufacturing uncertainties result in dimensional deviations causing incompatible operational performance and assembly errors. Process capability limitations of the manufacturer can cause an increase in part rejections, resulting in high production cost. This paper presents a study on a centrifugal impeller with focus on the conceptual design phase to obtain a turbomachine that is robust to manufacturing uncertainties. The impeller has been parameterized and evaluated using a commercial computational fluid dynamics (CFDs) solver. Considering the computational cost of CFD, a surrogate model has been prepared for the impeller by response surface methodology (RSM) using space-filling Latin hypercube designs. A sensitivity analysis has been performed initially to identify the critical geometric parameters which influence the performance mainly. Sensitivity analysis is followed by the uncertainty propagation and quantification using the surrogate model based Monte Carlo simulation. Finally, a robust design optimization has been carried out using a stochastic optimization algorithm leading to a robust impeller design for which the performance is relatively insensitive to variability in geometry without reducing the sources of inherent variation, i.e., the manufacturing noise.
    Type of Medium: Online Resource
    ISSN: 0742-4795 , 1528-8919
    URL: Article
    DOI: 10.1115/1.4033185
    Language: English
    Publisher: ASME International
    Publication Date: 2016
    detail.hit.zdb_id: 2010437-6
    detail.hit.zdb_id: 165371-4
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    BTU Cottbus
  • 6
    Online Resource
    Online Resource
    Juvenile–mature relationships and heritability estimates of several traits in loblolly pine ( Pinus taeda )
    Canadian Science Publishing ; 1984
    In:  Canadian Journal of Forest Research Vol. 14, No. 6 ( 1984-12-01), p. 822-825
    Details
    In: Canadian Journal of Forest Research, Canadian Science Publishing, Vol. 14, No. 6 ( 1984-12-01), p. 822-825
    Abstract: Heritability estimates for wood specific gravity of loblolly pine (Pinustaeda L.) in east Texas were high and relatively constant for all ages of wood sampled, but tracheid length was found to have low heritability at all ages. Heritability estimates for tracheid length declined with age after age 4 years. Coefficients of genetic prediction indicated that specific gravity of age 2 wood is a reliable predictor of wood specific gravity at age 25. Genetic covariances between juvenile and mature tracheid length were approximately zero. Coefficients of genetic prediction and genetic correlations between specific gravity and height and diameter at age 20 years indicated a strong negative relationship.
    Type of Medium: Online Resource
    ISSN: 0045-5067 , 1208-6037
    URL: Article
    DOI: 10.1139/x84-145
    Language: English
    Publisher: Canadian Science Publishing
    Publication Date: 1984
    detail.hit.zdb_id: 1473096-0
    SSG: 23
    SSG: 12
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  • 7
    Online Resource
    Online Resource
    Effect of shortened auxin treatments on the rooting of girdled slash pine shoots
    Canadian Science Publishing ; 1983
    In:  Canadian Journal of Forest Research Vol. 13, No. 5 ( 1983-10-01), p. 917-920
    Details
    In: Canadian Journal of Forest Research, Canadian Science Publishing, Vol. 13, No. 5 ( 1983-10-01), p. 917-920
    Abstract: Slash pine (Pinuselliottii Engl.) shoots collected from 30 ortets, approximately 8 years from seed, were girdled for different lengths of time and treated at the time they were girdled with one of five rooting powders varying in indolebutyric acid concentration. Girdling 2, 4, or 6 weeks prior to placement in the rooting bench significantly promoted rooting, but girdling times did not significantly differ from one another. Treatment with 1 or 2% IBA also promoted rooting, with 2-weeks' girdling plus 1 or 2% indolebutyric acid yielding the best results (70 and 73%, respectively). Shoots treated with 2% IBA produced significantly more primary roots than the other auxin treatments.
    Type of Medium: Online Resource
    ISSN: 0045-5067 , 1208-6037
    URL: Article
    DOI: 10.1139/x83-122
    Language: English
    Publisher: Canadian Science Publishing
    Publication Date: 1983
    detail.hit.zdb_id: 1473096-0
    SSG: 23
    SSG: 12
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  • 8
    Online Resource
    Online Resource
    Expected efficiencies of mating designs for reselection of parents
    Canadian Science Publishing ; 1990
    In:  Canadian Journal of Forest Research Vol. 20, No. 10 ( 1990-10-01), p. 1664-1671
    Details
    In: Canadian Journal of Forest Research, Canadian Science Publishing, Vol. 20, No. 10 ( 1990-10-01), p. 1664-1671
    Abstract: Expected efficiencies, in terms of genetic gain from reselection of parents (backwards selection), were compared for hierarchical mating, factorial, partial factorial, modified half diallel, and partial diallel crossing designs and polycrosses; this was done in parallel with a separate study of expected efficiencies for advanced-generation (forwards) selection, assuming a fixed-resources model of 100 parents and 10 000 offspring. The present study considered a single-trait case, with variable numbers of crosses per parent, varying heritability (h 2 ) levels (h 2  = 0.1, 0.2, and 0.5), and varying ratios of specific combining ability to general combining ability variance (0, 0.5, and 1). Compared with the case of forwards selection, the relative efficiencies of the different designs were generally similar. Two notable exceptions were the comparative inefficiency of small, disconnected factorial sets for backwards selection and the generally high (but not always maximal) efficiency of polycrosses for this purpose.
    Type of Medium: Online Resource
    ISSN: 0045-5067 , 1208-6037
    URL: Article
    DOI: 10.1139/x90-219
    Language: English
    Publisher: Canadian Science Publishing
    Publication Date: 1990
    detail.hit.zdb_id: 1473096-0
    SSG: 23
    SSG: 12
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  • 9
    Online Resource
    Online Resource
    Genomics and quantitative genetics
    Canadian Science Publishing ; 2001
    In:  Canadian Journal of Forest Research Vol. 31, No. 4 ( 2001-04-01), p. 617-622
    Details
    In: Canadian Journal of Forest Research, Canadian Science Publishing, Vol. 31, No. 4 ( 2001-04-01), p. 617-622
    Abstract: The interaction between genomics and quantitative genetics has been a two-way street. Genomics contributed genetic markers and genetic maps making it possible to study quantitative trait loci (QTLs), and quantitative genetics contributed new theories and computational techniques to deal with the data generated by QTL studies. QTL studies in forest trees have led to the discovery of a few major genes masquerading as quantitative genes, such as genes for rust resistance in several pine species. QTLs for many traits including height growth, leaf traits, wood specific gravity, flowering, frost resistance, disease resistance, and ease of vegetative propagation were found in one or more species. Spring cold hardiness in Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) holds the record for number of QTLs with 14. Generally the number is under seven. The effects are often large, but this may often be due to small population sizes. At this time the impact on forest tree breeding is small, although the potential is certainly there. An interesting marker aided back-crossing program is underway in American chestnut (Castanea dentata (Marsh.) Borkh.).
    Type of Medium: Online Resource
    ISSN: 0045-5067 , 1208-6037
    URL: Article
    DOI: 10.1139/x00-171
    Language: English
    Publisher: Canadian Science Publishing
    Publication Date: 2001
    detail.hit.zdb_id: 1473096-0
    SSG: 23
    SSG: 12
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    Wissenschaftspark Albert Einstein
  • 10
    Online Resource
    Online Resource
    A Paulownia Seed Source Trial in East Texas and its Implications to Species Introduction
    Oxford University Press (OUP) ; 1994
    In:  Southern Journal of Applied Forestry Vol. 18, No. 2 ( 1994-05-01), p. 65-67
    Details
    In: Southern Journal of Applied Forestry, Oxford University Press (OUP), Vol. 18, No. 2 ( 1994-05-01), p. 65-67
    Abstract: A seed source trial of royal paulownia (Paulownia tomentosa) and white-flowered paulownia (P. fortunei) was established in East Texas in 1987. Results showed that the two seed sources of white-flowered paulownia performed better in survival and in height and dbh growth than both seed sources of royal paulownia over the 6-yr period. No significant difference was found between the two seed sources within each species at the 5% level. The largest tree of white-flowered paulownia was 45 ft tall and 13.8 in. in diameter. The results suggest that white-flowered paulownia is a preferred species in climates similar to East Texas. South. J. Appl. For. 18(2): 65-67.
    Type of Medium: Online Resource
    ISSN: 0148-4419 , 1938-3754
    URL: Article
    DOI: 10.1093/sjaf/18.2.65
    Language: English
    Publisher: Oxford University Press (OUP)
    Publication Date: 1994
    detail.hit.zdb_id: 2043998-2
    SSG: 23
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