4,367 research outputs found

    Equations-of-motion method including renormalization and double-excitation mixing

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    The equations‐of‐motion method is discussed as an approach to calculating excitation energies and transition moments directly. The proposed solution [T. Shibuya and V. McKoy, Phys. Rev. A 2, 2208 (1970)] of these equations is extended in two ways. First we include the proper renormalization of the equations with respect to the ground state particle‐hole densities. We then show how to include the effects of two‐particle‐hole components in excited states which are primarily single‐particle‐hole states. This is seen to be equivalent to a single‐particle‐hole theory with a normalized interaction. Applications to various diatomic and polyatomic molecules indicate that the theory can predict excitation energies and transition moments accurately and economically

    Electronic excitations of benzene from the equations of motion method

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    We have used the equations of motion method to calculate the excitation energies and intensities of several transitions in benzene. The ordering of the singlet and triplet states of B_(2u), B_(1u), and E_(1u) symmetry agrees with experiment and the error in the calculated frequencies ranges from 3% to 25%. This error range is reasonable considering the relatively small basis set used. The most extensive calculation included 10 hole and 28 particle states and shows the effect of changes in the sigma core for each transition. The calculated transition moment of 1.74 a.u. for the ^1A_(1g)→^1E_(1u) transition agrees well with the experimental value of 1.61 a.u

    The use of covert reinforcement in the modification of external locus of control

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    An analogue study was conducted to test the clinical efficacy of covert reinforcement (Cautela, 1970) and to assess the role of behavioral .rehearsal in covert reinforcement. A secondary purpose was to determine the effects of image clarity, subject anxiety level and rate of extra session imagery on the therapeutic effect of covert reinforcement. Forty introductory psychology students who scored above 8 on Rotter\u27s (1966) I-E scale were seen for four, fifteen minute sessions over a two week period. Subjects were divided into five groups: a covert reinforcement group, an overt reinforcement group, a behavioral rehearsal group, an activity control group and a no treatment control group. Subjects were assessed on Rotter\u27s I-E scale before treatment, after treatment, and at a two week follow up. The covert reinforcement and overt reinforcement groups read outloud statements implying internal and external locus of control and were reinforced after reading statements implying internal locus of control. The behavioral rehearsal group read outloud statements which implied internal locus of control and neutral statements. They were instructed to say, Yes, it would be nice to be that way after internal statements. The activity control group read outloud statements which implied internal and external locus of control with no consequence for reading either type of statement. The no treatment control was tested at the same times as the above groups but had no contact with the experimenter during the two week treatment phase

    Pozzo

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    Man and woman dancing together on a stagehttps://scholarsjunction.msstate.edu/cht-sheet-music/13829/thumbnail.jp

    Idol : Just Let Me Worship You

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    https://digitalcommons.library.umaine.edu/mmb-vp/3906/thumbnail.jp

    Tell Me Why (I\u27d Like To Know The Reason Why)

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    https://digitalcommons.library.umaine.edu/mmb-vp/6221/thumbnail.jp

    Linger Awhile

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    1. The time is coming soon to say goodbye,A time of sadness it will be,But Honey listen to my parting sigh,And linger on awhile with me. CHORUSThe stars shine above you,Yet linger awhile;They whisper I love you, So linger awhile,And when you have gone away,Each hour will seem a day,I\u27ve something to tell you,So linger awhile. 2. Your pretty smile will always linger on,Tho\u27 you are many miles away,I will be lonely dear, when you are gone,The skies of blue will turn to gray. FRENCHTremblante comme une ingénue,Tu viens à notre rendezvous,Mais tu n\u27es pas si tÎt venue,Que tu veux retourner chez vous: La nuit est si belle,Reste encor un peu;L\u27amour nous appelle,Reste encor un peu;C\u27est l\u27heure bénieDes douces folies,Je t\u27en prie, ma mie,Reste encor un peu

    Oriental: Some Day In Araby

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    https://digitalcommons.library.umaine.edu/mmb-vp/3345/thumbnail.jp

    Identification of GSK-3 Beta Inhibitors from Natural Products

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