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Search Results: 1 - 10 of 352720 matches for " Emmel P.D. "
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Temperature dependence of the absorption coefficient in doped quantum wells
Baldan, M.R.;Serra, R.M.;Emmel, P.D.;Silva, A. Ferreira da;
Brazilian Journal of Physics , 1999, DOI: 10.1590/S0103-97331999000400021
Abstract: in this work we present a calculation of the infrared optical absorption coefficient for a ga1-xalxas quantum well (qw) as a function of donor impurity concentration, compensation and temperature. we treat this problem using a self-consistent method (sc) calculation taking into account donors as major impurities. the variational method was used to obtain the ground state wave-function of an electron bound to a donor impurity in a qw. the results show a shift of energy in the absorption coefficient.
Temperature dependence of the absorption coefficient in doped quantum wells
Baldan M.R.,Serra R.M.,Emmel P.D.,Silva A. Ferreira da
Brazilian Journal of Physics , 1999,
Abstract: In this work we present a calculation of the infrared optical absorption coefficient for a Ga1-xAl xAs quantum well (QW) as a function of donor impurity concentration, compensation and temperature. We treat this problem using a Self-Consistent Method (SC) calculation taking into account donors as major impurities. The Variational Method was used to obtain the ground state wave-function of an electron bound to a donor impurity in a QW. The results show a shift of energy in the absorption coefficient.
Competenze professionali su una nuova frontiera dell'Estimo: il controllo tempi-costi nel processo costruttivo edilizio (una proposta operativa: il Construction Management)
P.D. Patrone
Aestimum , 1995,
Abstract:
SYNTHESIS OF NEW ANTHRANILIC ACID DYES AND EVALUATION FOR THEIR ANTIMICROBIAL AND ANTI-INFLAMMATORY ACTIVITIES.
P.D. Gaikwad*
International Journal of Pharmacy and Technology , 2010,
Abstract: A new series of dyes were synthesized from anthranilic acid derivatives by reacting p-aminobenzoic acid to HCl salt of ammonium benzoyl chloride. Then condensation of HCl salt of ammonium benzoylchloride with anthranilic acid and its derivatives at various conditions like temperature, condition of reactants and solvents were maintained for the preparation of dyes. All the dyes were screened forantibacterial activity against S.aureus and E.coli. These dyes were also shows significant anti-inflammatory activity. The structures of new synthesized dyes were established on the basis of elemental analysis, UV, IR and NMR.
T. Bosch, Om de macht over het water. De nationale waterstaatsdienst tussen staat en samenleving 1798-1849
P.D. Groote
BMGN : Low Countries Historical Review , 2001,
Abstract:
The Effect of Carbon Content in Martensite on the Strength of Dual Phase Steel
P.D. Sudersanan
Bonfring International Journal of Industrial Engineering and Management Science , 2012, DOI: 10.9756/bijiems.1254
Abstract: The objective of this investigation is to study the variation of strength of dual phase steel with the percentage of carbon content in the martensite phase. The study is conducted on samples of dual phase steel prepared by intercritical annealing process with temperature varying from 730oC to 810oC. In this process both coarse and fine ferrite- martensite structures are produced with volume fraction of martensite varying from 48 to 69%. It has been observed from the investigation that both yield strength and tensile strength increased with increasing carbon content in the martensite phase of dual phase steel up to 0.195% and then decreased. The optimum values of strength are observed at 0.195 % of carbon
Statistical analysis for stability and adaptability testing of mungbean (Vigna radiata (L.) Wilczek) genotypes
P.D.Abeytilakarathna
Electronic Journal of Plant Breeding , 2010,
Abstract: Aimed at developing a precise and efficient parsimonious method of testing the stability of promising mungbean lines,particularly using small number of observations, this paper presents the analysis of variance of 10 mungbean lines in 4environments for 2 years. Simultaneous varietal selection using the AMMI (additive main effects and multiplicativeinteraction) model along with mean deviation from maximum plot yield ,suggested single value of IPCA (interactionprincipal component analysis axes) scores (IPCAs)and IPCAs vs. mean yield biplot were found to be more effective forevaluating wide adaptability and stability of mungbean over diverse environments. Mungbean lines with above grand meanyield having the lowest mean deviation (D) and IPCAs scores which are close to zero are selected as the most adaptablepromising lines in the multi-location trial. The AMMI1 biplot ordinate with IPCA1 captures lower percentage of genotype xenvironment interaction (GEI), while suggested biplot of the reference method that ordinate with IPCAs scores capture 100% of GEI
G. Nabrink, Seksuele hervorming in Nederland. Achtergronden en geschiedenis van de Nieuw-Malthusiaanse Bond (NMB) en de Nederlandse Vereniging voor Seksuele Hervorming (NVSH) 1881-1971
P.D. 't Hart
BMGN : Low Countries Historical Review , 1980,
Abstract:
H.A. Diederiks, D.J. Noordam, H.D. Tjalsma, Armoede en sociale spanning. Sociaal-historische studies over Leiden in de achttiende eeuw
P.D. 't Hart
BMGN : Low Countries Historical Review , 1986,
Abstract:
R.M. van Daalen, Klaagbrieven en gemeentelijk ingrijpen. Amsterdam 1865-1920
P.D. 't Hart
BMGN : Low Countries Historical Review , 1989,
Abstract:
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