Career Exploration at the Middle School Level: Barriers and Opportunities

In this essay, we discuss issues related to the integration of career exploration in our nation’s middle schools. We discuss the theoretical and empirical basis for career exploration at the middle school level and identify selected barriers to its effective implementation, namely with regards to career advising and parent involvement. We also propose new directions for practice and research as we work to counteract these barriers

Midcourse maneuver operations program

Midcourse Maneuver Operations Program /MMOP/ computes the required velocity change to correct a spacecraft trajectory. The program establishes the existence of maneuvers which satisfy spacecraft constraints, explores alternate trajectories in the event that some out-of-tolerance condition forces a change in plans, and codes the maneuvers into commands

Critical speeds and forced response solutions for active magnetic bearing turbomachinery, part 2

The need for better performance of turbomachinery with active magnetic bearings has necessitated a study of such systems for accurate prediction of their vibrational characteristics. A modification of existing transfer matrix methods for rotor analysis is presented to predict the response of rotor systems with active magnetic bearings. The position of the magnetic bearing sensors is taken into account and the effect of changing sensor position on the vibrational characteristics of the rotor system is studied. The modified algorithm is validated using a simpler Jeffcott model described previously. The effect of changing from a rotating unbalance excitation to a constant excitation in a single plane is also studied. A typical eight stage centrifugal compressor rotor is analyzed using the modified transfer matrix code. The results for a two mass Jeffcott model were presented previously. The results obtained by running this model with the transfer matrix method were compared with the results of the Jeffcott analysis for the purposes of verification. Also included are plots of amplitude versus frequency for the eight stage centrifugal compressor rotor. These plots demonstrate the significant influence that sensor location has on the amplitude and critical frequencies of the rotor system

Surveying the Agents of Galaxy Evolution in the Tidally Stripped, Low Metallicity Small Magellanic Cloud (SAGE-SMC). I. Overview

The Small Magellanic Cloud (SMC) provides a unique laboratory for the study of the lifecycle of dust given its low metallicity (~1/5 solar) and relative proximity (~60 kpc). This motivated the SAGE-SMC (Surveying the Agents of Galaxy Evolution in the Tidally Stripped, Low Metallicity Small Magellanic Cloud) Spitzer Legacy program with the specific goals of studying the amount and type of dust in the present interstellar medium, the sources of dust in the winds of evolved stars, and how much dust is consumed in star formation. This program mapped the full SMC (30 deg^2) including the body, wing, and tail in seven bands from 3.6 to 160 μm using IRAC and MIPS on the Spitzer Space Telescope. The data were reduced and mosaicked, and the point sources were measured using customized routines specific for large surveys. We have made the resulting mosaics and point-source catalogs available to the community. The infrared colors of the SMC are compared to those of other nearby galaxies and the 8 μm/24 μm ratio is somewhat lower than the average and the 70 μm/160 μm ratio is somewhat higher than the average. The global infrared spectral energy distribution (SED) shows that the SMC has approximately 1/3 the aromatic emission/polycyclic aromatic hydrocarbon abundance of most nearby galaxies. Infrared color-magnitude diagrams are given illustrating the distribution of different asymptotic giant branch stars and the locations of young stellar objects. Finally, the average SED of H II/star formation regions is compared to the equivalent Large Magellanic Cloud average H II/star formation region SED. These preliminary results will be expanded in detail in subsequent papers

Laminated ferrite memory, phase II FINAL technical report, Jun. 1, 1965 - Jun. 30, 1966

Thermally stable ferrite materials tailored to laminated memory arrays operated at low current level

Identification of Selected Factors That Impact the Preparation Of CTE Teachers

Career and technical education (CTE) has remained a dynamic entity in the world of education since its inception. The changes in the 1990s have made significant advancements in the image and validity of career and technical education programs. These programs have become an important factor of economy and social growth worldwide. The success of students begins with how they are educated and the quality and training of their teachers. Improving teacher quality will be important if CTE is expected to alter its mission. The availability, experience, priorities, and selected practices of teachers can be expected to affect quality of instruction. This conceptual paper reported the following factors as impacting the preparation of CTE teachers: industry experience and academic background, teacher shortages, alternative routes to licensure, professional development, recruitment. Substantial investments in recruitment and in-service training approaches may be required if federal legislation continues to make supporting academic achievement a priority for CTE.Career and technical education (CTE) has remained a dynamic entity in the world of education since its inception. The changes in the 1990s have made significant advancements in the image and validity of career and technical education programs. These programs have become an important factor of economy and social growth worldwide. The success of students begins with how they are educated and the quality and training of their teachers. Improving teacher quality will be important if CTE is expected to alter its mission. The availability, experience, priorities, and selected practices of teachers can be expected to affect quality of instruction. This conceptual paper reported the following factors as impacting the preparation of CTE teachers: industry experience and academic background, teacher shortages, alternative routes to licensure, professional development, recruitment. Substantial investments in recruitment and in-service training approaches may be required if federal legislation continues to make supporting academic achievement a priority for CTE

MIDAS, prototype Multivariate Interactive Digital Analysis System for large area earth resources surveys. Volume 1: System description

A third-generation, fast, low cost, multispectral recognition system (MIDAS) able to keep pace with the large quantity and high rates of data acquisition from large regions with present and projected sensots is described. The program can process a complete ERTS frame in forty seconds and provide a color map of sixteen constituent categories in a few minutes. A principle objective of the MIDAS program is to provide a system well interfaced with the human operator and thus to obtain large overall reductions in turn-around time and significant gains in throughput. The hardware and software generated in the overall program is described. The system contains a midi-computer to control the various high speed processing elements in the data path, a preprocessor to condition data, and a classifier which implements an all digital prototype multivariate Gaussian maximum likelihood or a Bayesian decision algorithm. Sufficient software was developed to perform signature extraction, control the preprocessor, compute classifier coefficients, control the classifier operation, operate the color display and printer, and diagnose operation