Uses of lunar sulfur

Sulfur and sulfur compounds have a wide range of applications for their fluid, electrical, chemical, and biochemical properties. Although known abundances on the Moon are limited (approximately 0.1 percent in mare soils), sulfur is relatively extractable by heating. Coproduction of sulfur during oxygen extraction from ilmenite-rich mare soils could yield sulfur in masses up to 10 percent of the mass of oxygen produced. Sulfur deserves serious consideration as a lunar resource

Laer-induced Breakdown Spectroscopy Instrument for Element Analysis of Planetary Surfaces

One of the most fundamental pieces of information about any planetary body is the elemental and mineralogical composition of its surface materials. We are developing an instrument to obtain such data at ranges of up to several hundreds of meters using the technique of Laser-Induced Breakdown Spectroscopy (LIBS). We envision our instrument being used from a spacecraft in close rendezvous with small bodies such as comets and asteroids, or deployed on surface-rover vehicles on large bodies such as Mars and the Moon. The elemental analysis is based on atomic emission spectroscopy of a laser-induced plasma or spark. A pulsed, diode pumped Nd:YAG laser of several hundred millijoules optical energy is used to vaporize and electronically excite the constituent elements of a rock surface remotely located from the laser. Light emitted from the excited plasma is collected and introduced to the entrance slit of a small grating spectrometer. The spectrally dispersed spark light is detected with either a linear photo diode array or area CCD array. When the latter detector is used, the optical and spectrometer components of the LIBS instrument can also be used in a passive imaging mode to collect and integrate reflected sunlight from the same rock surface. Absorption spectral analysis of this reflected light gives mineralogical information that provides a remote geochemical characterization of the rock surface. We performed laboratory calibrations in air and in vacuum on standard rock powders to quantify the LIBS analysis. We performed preliminary field tests using commercially available components to demonstrate remote LIBS analysis of terrestrial rock surfaces at ranges of over 25 m, and we have demonstrated compatibility with a six-wheeled Russian robotic rover vehicle. Based on these results, we believe that all major and most minor elements expected on planetary surfaces can be measured with absolute accuracy of 10-15 percent and much higher relative accuracy. We have performed preliminary systems analysis of a LIBS instrument to evaluate probable mass and power requirements; results of this analysis are summarized

Young Citizens of the World Unite! A Case for the Model United Nations in Middle School Classrooms

In this manuscript, the authors describe the benefits and theoretical connections the Junior Model United Nations (JMUN) program has with middle school classrooms. The lens used to view the JMUN program is informed by literature on the needs of young adolescents, inquiry learning, and global citizenship. Findings from this literature illuminate nuances in the interaction between inquiry learning through the C3 Framework and active learning participation. Implications for middle school students, in-service teachers, and teacher candidates are discussed

Flaw growth behavior of Inconel 718 at room and cryogenic temperature Final report, 29 Apr. 1968 - 31 Oct. 1969

Fracture crack propagation in Inconel at room and cryogenic temperatures for surface defective sample

The Effectiveness Of Computer Assisted Instruction On Children\u27s Mathematical Problem-Solving Ability

The author provided activities for a target group of third grade students who were experiencing difficulties in mastering the skills required to solve problems involving money. The program’s aims were to remediate these students by giving them the opportunity to use instructional software that would increase their mathematical vocabulary, strengthen the logic behind their thought patterns, and assist them in mastering the skills necessary to solve word problems with confidence and success. The author developed and implemented a computer program that included reading, understanding, analyzing estimating, and computing with regard to the solving of word problems having to do with money and the making of change. Focus was placed upon the importance of estimation in developing the thinking skills necessary to achieve success in solving word problems. Each of the students in the target group was given a pretest and an attitudinal survey. Records of students performance were stored to disk automatically. Each of student was then given the opportunity to view the computer program and work on an individualized basis with the author. The students also received instruction in vocabulary. Parents were asked to provide written documentation concerning activities performed at home. At the end of the instructional period, the posttest and the attitudinal survey were administered to all students in the target group. Results of the posttest indicated that the students in the target group improved their ability to solve word problems concerned with money and the making of change. The attitudinal survey indicated that the students gained both confidence and a feeling of success. The computer program was shared with other teachers in the school. It was also donated to the public domain catalog of the school district in which the author teaches so that other county teachers would have the opportunity to use it with their students.(Appendices include county minimum standards, state minimum standards, attitudinal questionnaire, sample tests, parental form, software evaluation form, and letters from both principal and teachers.

An evaluation of Te Rau Puawai workforce 100: Stakeholder perspectives

To evaluate the Te Rau Puawai programme, the Ministry of Health commissioned the Maori and Psychology Research Unit of the University of Waikato in July 2001. The overall aim of the evaluation was to provide the Ministry with a clearer understanding of the programme including: the perceived critical success factors, the barriers if any regarding Te Rau Puawai, the impact of the programme, the extent to which the programme may be transferable, gaps in the programme, and suggested improvements. There are a number of stakeholders who do not have a direct role in the provision of Te Rau Puawai. These people are not involved in the day to day running of Te Rau Puawai (as do, for example, the coordinator, support team or academic mentors), nevertheless they play an important role, contributing in a variety of ways to the programme

Letters between Mary Pettit and William Kerr\u27s secretary

Letters concerning a position in Domestic Science at Utah Agricultural College

The Impact of Mainstreaming on Pre-Service Reading Education

Mainstreaming is a complex phenomenon that reaches far beyond placing children in regular classes. Special education people are advocating a mainstreaming process as it applies to exceptional or handicapped students. But mainstreaming should be considered as a new delivery system which can be a potent vehicle to bring about major curriculum and systems changes in American education. In fact, the new delivery system en compassed in mainstreaming seems to be the tip of an iceberg that touches all aspects of the educational process

Factors that Contribute to Resident Teaching Effectiveness

Background One of the key components of residency training is to become an educator. Resident physicians teach students, advanced practice providers, nurses, and even faculty on a daily basis. Objective The goal of this study was to identify the objective characteristics of residents, which correlate with perceived overall teaching effectiveness. Methods We conducted a one-year, retrospective study to identify factors that were associated with higher resident teaching evaluations. Senior emergency medicine (EM) teaching residents are evaluated by medical students following clinical teaching shifts. Eighteen factors pertaining to resident teaching effectiveness were chosen. Two items from the medical students' evaluations were analyzed against each factor: teaching effectiveness was measured on a five-point Likert scale and an overall teaching score (1-75). Results A total of 46 EM residents and 843 medical student evaluations were analyzed. The ACGME milestones for systems-based practice (p = 0.02) and accountability (p = 0.05) showed a statistically significant association with a rating of "five" on the Likert scale for teaching effectiveness. Three other ACGME milestones, systems-based practice (p = 0.01), task switching (p = 0.04), and team management (p = 0.03) also showed a statically significant association of receiving a score of 70 or greater on the overall teaching score. Conclusion Residents with higher performance associated with system management and accountability were perceived as highly effective teachers. USMLE and in-service exams were not predictive of higher teaching evaluations. Our data also suggest that effective teachers are working in both academic and community settings, providing a potential resource to academic departments and institutions