Survey of reader preferences concerning the format of NASA langley-authored technical reports

The U.S. government technical report is a primary means by which the results of federally funded research and development (R&D) are transferred to the U.S. aerospace industry. However, little is known about this information product in terms of its actual use, importance, and value in the transfer of federally funded R&D. Little is also known about the intermediary-based system that is used to transfer the results of federally funded R&D to the U.S. aerospace industry. To help establish a body of knowledge, the U.S. government technical report is being investigated as part of the NASA/DoD Aerospace Knowledge Diffusion Research Project. In this article, we summarize the literature on the U.S. government technical report and present the results of a survey of U.S. aerospace engineers and scientists that solicited their opinions concerning the format of NASA Langley Research Center (LaRC)-authored technical reports. To learn more about the preferences of U.S. aerospace engineers and scientists concerning the format of NASA LaRC-authored technical reports, we surveyed 133 report producers (i.e., authors) and 137 report users in March–April 1996. Questions covered such topics as: (a) the order in which report components are read; (b) components used to determine if a report would be read; (c) those components that could be deleted; (d) the placement of such components as the symbols list; (e) the desirability of a table of contents; (f) the format of reference citations; (g) column layout and right margin treatment; and (h) writing style in terms of person and voice. Mail (self-reported) surveys were used to collect the data. The response rates for report producers (i.e., authors) was 68% and for users, was 62%.     

Analysis of academic administrators’ attitudes: annual evaluations and factors that improve teaching

This article examines academic administrators’ attitudes towards the academic evaluation process in the US and those factors that are utilised to improve teaching. We use path regressions to examine satisfaction with evaluation procedures, as well as the direct and indirect effects of these factors on perceptions of whether the evaluation process facilitates quality instruction. With increased pressure for accountability being placed on higher education, it is important to ensure that we are meeting both public and academic expectations. The evaluation process is an important tool to ensure the university’s goals and values are articulated and that academics can be successful in their individual career paths. The problem is most research finds flaws with the current method of evaluation, and academics and academic administrators are sceptical about the process and results. We find there are environmental factors that influence academic administrators’ perceptions of academic evaluations and the ability to improve classroom instruction.     

Hemoglobin, growth, and attention of infants in southern Ethiopia

Male and female infants from rural Ethiopia were tested to investigate relations among hemoglobin (Hb), anthropometry, and attention. A longitudinal design was used to examine differences in attention performance from 6 (M = 24.9 weeks, n = 89) to 9 months of age (M = 40.6 weeks, n = 85), differences hypothesized to be related to changes in iron status and growth delays. Stunting (length‐for‐age z scores < ?2.0) and attention performance, t(30) = ?2.42, p = .022, worsened over time. Growth and Hb predicted attention at 9 months, R² = .15, p < .05, but not at 6. The study contributes to the knowledge base concerning the relations among Hb, early growth, and attention.     

Analysis of a laminar-flow diffusional mixer for directed self-assembly of liposomes

The present work describes the operation and simulation of a microfluidic laminar-flow mixer. Diffusive mixing takes place between a core solution containing lipids in ethanol and a sheath solution containing aqueous buffer, leading to self assembly of liposomes. Present device architecture hydrodynamically focuses the lipid solution into a cylindrical core positioned at the center of a microfluidic channel of 125 × 125-μm² cross-section. Use of the device produces liposomes in the size range of 100–300 nm, with larger liposomes forming at greater ionic strength in the sheath solution and at lower lipid concentration in the core solution. Finite element simulations compute the concentration distributions of solutes at axial distances of greater than 100 channel widths. These simulations reduce computation time and enable computation at long axial distances by utilizing long hexahedral elements in the axial flow region and fine tetrahedral elements in the hydrodynamic focusing region. Present meshing technique is generally useful for simulation of long microfluidic channels and is fully implementable using comsol Multiphysics. Confocal microscopy provides experimental validation of the simulations using fluorescent solutions containing fluorescein or enhanced green fluorescent protein.     

Characteristics of child abuse in immigrant Korean families and correlates of placement decisions

OBJECTIVE: This study examined the characteristics and patterns of child abuse among immigrant Korean families in Los Angeles and critical variables that contribute to the type of placement made by the child protective services (CPS) system. METHOD: Data were obtained from reviewing and analyzing 170 active Korean case files maintained by the Asian Pacific Unit (APU) of the Los Angeles County Department of Children and Family Services (LAC-DCFS) during July through September, 2001. Logistic regression analysis was employed to examine the odds of children being kept in or removed from the home. RESULTS: Some of the major findings from this study include: (1) immigrant Korean families are more likely to be charged with physical abuse (49.4%) and less likely to be charged with neglect (20.6%) in comparison with all other groups in Los Angeles (13.2% and 27.1%, respectively); (2) the circumstance under which physical abuse occurred most frequently was corporal punishment used by Korean parents with an intention to discipline their children; and (3) the context under which emotional abuse occurred among the Korean families was likely to be children's witnessing domestic violence. In addition, the logistic regression showed that response status, referral source, living arrangement, victim's relationship to perpetrator, and chronicity of abuse were significant in predicting out-of-home placement. CONCLUSIONS: An analysis of Korean child abuse cases reported to child protective service revealed that culture and child rearing practices shaped the patterns of child maltreatment. A culturally sensitive approach is strongly suggested for effective child abuse prevention and intervention services with this group by CPS agencies.