4,165 research outputs found

    Summary of investigations of light scattering in highly reflecting pigmented coatings

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    Light scattering in highly reflecting pigmented coatings - silver bromide and particle suspensions and paint film

    Investigation of light scattering in highly reflecting pigmented coatings. Volume 3 - Monte Carlo and other statistical investigations Final report, 1 May 1963 - 30 Sep. 1966

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    Monte Carlo methods, Mie theory, and random walk and screen models for predicting reflective properties of paint film

    Investigation of Light Scattering in Highly Reflecting Pigmented Coatings Quarterly Report, Feb. 1 - May 1, 1966

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    Monte Carlo method applied to pigment particle clusters, and relevance of Mie scattering function to reflected ligh

    Investigation of light scattering in highly reflecting pigmented coatings Quarterly report, Nov. 1, 1965 - Feb. 1, 1966

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    Monte Carlo treatment to find light scattering parameters of metal filled, reflecting pigmented coating

    The Denying of Death: A Social Psychological Study

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    Cultural studies indicate the existence of a ubiquitous death fear This fear is usually manifest through the defense mechanism of denial. In American society, the contradiction between life-oriented cultural themes and the death theme intensifies the denial of death. Past studies indicate that a host of social and psychological variables are associated with death denial. The present study consisted of a survey of death attitudes. The results showed that death denial is associated with age, marital status, death of a parent, feeling of nervousness, and participation in dangerous activities. On the other hand. sex, health, and religious activity were not found associated with death denial

    Business strategies and employment decisions: Interviews with New Zealand firms

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    A firm’s business strategy does not exist in a vacuum; it requires employees to implement it. However, firms often say that they have difficulties hiring certain types of employees. Through interviews with firms and analysis of the 2008 New Zealand Business Operations Survey, this research explored the interaction between strategy and employees’ skills, and differences between high value-add (HVA) and medium value-add (MVA) firms. MVA firms focused more on production methods, technical skills, and margins over costs. HVA firms focused more on the business skills of a few, professional core employees, as well as the marketing aspects of their products.The research was conducted with funding from the Ministry of Economic Development and the Cross- Department Research Pool (CDRP)

    Analysis of stratospheric ozone, temperature, and minor constituent data

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    The objective of this research is to use available satellite measurements of temperature and constituent concentrations to test the conceptual picture of stratospheric chemistry and transport. This was originally broken down into two sub-goals: first, to use the constituent data to search for critical tests of our understanding of stratospheric chemistry and second, to examine constituent transport processes emphasizing interactions with chemistry on various time scales. A third important goal which has evolved is to use the available solar backscattered ultraviolet (SBUV) and Total Ozone Mapping Spectrometer (TOMS) data from Nimbus 7 to describe the morphology of recent changes in Antarctic and global ozone with emphasis on searching for constraints to theories. The major effort now being pursued relative to the two original goals is our effort as a theoretical team for the Arctic Airborne Stratospheric Expedition (AASE). Our effort for the AASE is based on the 3D transport and chemistry model at Goddard. Our goal is to use this model to place the results from the mission data in a regional and global context. Specifically, we set out to make model runs starting in late December and running through March of 1989, both with and without heterogeneous chemistry. The transport is to be carried out using dynamical fields from a 4D data assimilation model being developed under separate funding from this task. We have successfully carried out a series of single constituent transport experiments. One of the things demonstrated by these runs was the difficulty in obtaining observed low N2O abundances in the vortex without simultaneously obtaining very high ozone values. Because the runs start in late December, this difficulty arises in the attempt to define consistent initial conditions for the 3D model. To accomplish a consistent set of initial conditions, we are using the 2D photochemistry-transport model of Jackman and Douglass and mapping in potential temperature, potential vorticity space as developed by Schoeberl and coworkers

    Contribution of a Real Depth Distance Stereoacuity Test to Clinical Management

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    Measurement of Stereopsis forms an important part of the clinical assessment of patients with disorders of ocular motility. The introduction of a real depth distance stereoacuity test (FD2) was evaluated in clinical practice and to what extent the introduction affected clinical management. Seventy-three patients under evaluation before and following the introduction of the test were included. Combined thresholds were measured at near using the Frisby and TNO test and at distance using the FD2. Fifty healthy controls were included. Forty-five patients demonstrated Stereopsis using the FD2 and 23 of these had a change in their management based in part on their responses using the FD2. Patients with evidence of Stereopsis using the FD2 were significantly more likely to have change in their management than expected from the whole sample (P = .02). The introduction of a real depth distance stereoacuity test into clinical practice contributed to a change in management when used in conjunction with other tests. The usefulness of the FD2 is limited by its range at 6 m. Use at closer distances necessitates the calculation of binocular threshold from the combined and monocular threshold

    Can Jury Trial Innovations Improve Juror Understanding of DNA Evidence?

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    A single spot of blood on a pink windowsill will tell investigators who broke a windowpane, turned a lock, and kidnapped 2-year-old Molly Evans from her bedroom in the middle of the night. An expert witness will testify that the DNA profile of the blood evidence recovered from the windowsill was entered into CODIS, an electronic database of DNA profiles. That process yielded a “hit,” identifying the defendant as the most likely source of the blood inside Molly’s room. But will jurors be able to understand the expert’s intricate analysis and use it to reach a verdict? And what—if any—steps can be taken to increase jurors’ comprehension of complex DNA evidence? Questions such as these prompted an NIJ-funded study on the impact of jury trial innovations upon mock jurors’ understanding of contested mitochondrial DNA (mtNDA) evidence. By examining how jurors in different experimental conditions performed on a Juror Comprehension Scale both before and after deliberations, researchers were able to assess whether four specific innovations improved jurors’ understanding of this complex evidence and identify which innovations worked best
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