General parametric reentry study for several synchronous earth orbits

Reentry graphs for synchronous earth orbit

Structural assembly in space

A cost algorithm for predicting assembly costs for large space structures is given. Assembly scenarios are summarized which describe the erection, deployment, and fabrication tasks for five large space structures. The major activities that impact total costs for structure assembly from launch through deployment and assembly to scientific instrument installation and checkout are described. Individual cost elements such as assembly fixtures, handrails, or remote minipulators are also presented

NASA/DOD earth orbit shuttle traffic models based on end to end loading of payloads

An analysis of the spacecraft configurations and space missions for the Earth Orbit Shuttle traffic model based on an end-to-end loading of payloads is presented. Two possible reusable tugs are considered. The space missions are described with respect to the following: (1) number of earth orbit shuttle flights by inclination, (2) total payloads to orbit, (3) energy stages required, and (4) characteristics of reusable tug

Henri Temianka Correspondence; (pruett)

https://digitalcommons.chapman.edu/temianka_correspondence/2656/thumbnail.jp

Henri Temianka Correspondence; (pruett)

https://digitalcommons.chapman.edu/temianka_correspondence/2658/thumbnail.jp

Henri Temianka Correspondence; (pruett)

https://digitalcommons.chapman.edu/temianka_correspondence/2659/thumbnail.jp

NASA/DOD earth orbit shuttle traffic models based on side by side loading of payloads

An analysis of the spacecraft configurations and space missions for the Earth Orbit Shuttle traffic model based on side-by-side loading of payloads is presented. The reusable tugs to be employed for the mission are examined. The space missions are described with respect to the following: (1) number of Earth Orbit Shuttle flights by inclination, (2) total payloads to orbit, (3) energy states required, and (4) characteristics of reusable tug

Control of Herbaceous Vegetation in Forest Plantings

Chemical and mechanical methods of reducing herbaceous competition within tree plantings on three Iowa soil types were studied. Treatments included Garlon, Esteron-Dowpon, Simazin, Chloro IPC, Mylone, Vapam, disking, mowing, cultivation, and check. Survival and height growth of jack pine, white pine, cottonwood, and black walnut were determined for each method of control. Available light and soil moisture were also determined within each treatment as supplementary measures of the success of competition control. Tree seedling survival and height growth varied somewhat among treatments from soil type to soil type. However, survival and height growth were generally greatest on the cultivated plots followed in order by (1) Garlon and Esteron-Dowpon; (2) Simazin, Chloro IPC, and mowing; and (3) disking, Vapam, and Mylone. Thirty- to fifty-day differences in the length of effectiveness of the chemicals and major changes in weed composition during reinvasion affected responses noticeably. In general, tree survival and height growth varied directly with the effectiveness of weed control as reflected in available soil moisture and light intensities

Coordinating Loan Repayment Assistance Programs with New Federal Legislation

For decades, law school administrators, faculty members, students and graduates have worried about the problem of the ever-increasing cost of attendance at the nation’s law schools, and the rapidly rising average debt of graduating law students. The problem was particularly acute for students who desired careers in public service, because starting salaries in the government and non-profit sectors failed to keep pace with the increase in educational debt of law school graduates. In response, many law schools created loan repayment assistance programs (LRAPs), through which they subsidized loan repayment for some or all of their graduates who undertook public service jobs or careers. Most of these programs are insufficiently funded to meet the needs of their graduates who desire to use them, and demand for financial assistance for lower-income graduates has particularly accelerated as the recession that began in 2008 caused private sector firms to reduce their hiring, prompting more student interest in public sector employment. In addition, many law schools had no LRAP programs at all. Fortunately, Congress has significantly alleviated this problem, passing four laws between 2005 and 2010 that collectively reduce the debt repayment burdens on graduates, particularly (though not exclusively) those in public service. The new legislation also makes it possible for law schools to create or restructure LRAP programs in a way that provides a great deal of debt relief to graduates in public service at the lowest possible cost to the law school. As of this writing (in the summer of 2010), at least seven law schools—the University of California at Berkeley, Georgetown, UCLA, Duke, Northwestern, Virginia, and Suffolk—have altered their LRAP programs to take maximum advantage of the federal legislation, and several others are currently considering modifications. This article, together with an associated web-based calculator, provides guidance for law school administrators and faculty members who desire to coordinate law school LRAP benefits with those provided by federal law, and for law students and alumni who might want to suggest LRAP improvements to their schools