Equilibrium States of Liquid, Solid, and Vapor and the Configurations for Copper, Tungsten, and Pores in Liquid-Phase Sintering

The equilibrium state of the liquid-solid structure during liquid-phase sintering (LPS) is pondered with respect to minimum energy geometries. Besides the solid-liquid ratio, several interfacial energies determine the most stable geometric configuration. In this study, we rely on the attributes of the copper or nickel as the liquid, tungsten as the solid, and vapor to solve for terminal configurations that include liquid pools inside the solid grains. Surface evolution is enabled using a stepwise computer program[1] to rearrange and reshape small grain clusters reflective of LPS based on a preset combination of wetting and dihedral angles. The findings show how different interfacial energies, as a result of oxidation or impurity segregation, play a role in determining the final geometry. The specific concern is identification of situations in which a liquid is stable inside the solid, as observed in some LPS materials.open112Nsciescopu

Research in advanced formal theorem-proving techniques

The results are summarised of a project aimed at the design and implementation of computer languages to aid in expressing problem solving procedures in several areas of artificial intelligence including automatic programming, theorem proving, and robot planning. The principal results of the project were the design and implementation of two complete systems, QA4 and QLISP, and their preliminary experimental use. The various applications of both QA4 and QLISP are given

Description of the three axis low-g accelerometer package

The three axis low-g accelerometer package designed for use on the Space Processing Application Rocket (SPAR) Program is described. The package consists of the following major sections: (1) three Kearfott model 2412 accelerometers mounted in an orthogonal triad configuration on a temperature controlled, thermally isolated cube, (2) the accelerometer servoelectronics (printed circuit cards PC-6 through PC-12), and (3) the signal conditioner (printed circuit cards PC-15 and PC-16). The measurement range is 0 + or - 0.031 g with a quantization of 1.1 x 10 to the 7th power g. The package was flown successfully on six SPAR launches with the Black Brant booster. These flights provide approximately 300 s of free fall or zero-g environment

Rapid Analysis and Manufacturing Propulsion Technology (RAMPT)

NASA's strategic plan calls for the development of enabling technologies, improved production methods, and advanced design and analysis tools related to the agency's objectives to expand human presence in the solar system. NASA seeks to advance exploration, science, innovation, benefits to humanity, and international collaboration, as well as facilitate and utilize U.S. commercial capabilities to deliver cargo and crew to space

Carlos Castaneda (1925-1998): Reading Between His Lines, a Summary Judgment

Don Juan is a fictional character. Yaqui in Sonora and Arizona have no history of peyote rituals. These two facts help explain why, by 1975, Castaneda’s followers were seeking shamans comparable to Don Juan among the Huichol of Mexico. In recent years peyote tourists have invaded the sacred land where Huichol venerate the peyote spirit. The rising tide of tourists in that area is rapidly depleting peyote and has stimulated Mexican authorities to incarcerate Huichol peyote hunters (Fikes, 1993; 2013). In the early 1990s Castaneda created a cult, Tensegrity, which taught disciples stylized movements combining “tai chi, modern dance and karate” (Marshall, 2007). He established an inner circle, demanding that his followers sever all family ties or “erase personal history.” He seduced women followers and probably induced several of them to commit suicide (Austin, 2007; Marshall, 2007). Castaneda’s erratic “acting out” and his insistence that followers cut themselves off entirely from everyone essential to perpetuating their identity exemplified harmful practices described by his followers

Rapid Analysis and Manufacturing Propulsion Technology (RAMPT)

The RAMPT project is maturing novel design and manufacturing technologies to increase scale, significantly reduce cost, and improve performance for regeneratively-cooled thrust chamber assemblies, specifically the combustion chamber and nozzle for government and industry programs

Low Cost Upper Stage-Class Propulsion

No abstract availabl

When Shall I Reach That Happy Place? Apocalyptic Themes in the Hymns of the Stone-Campbell Movement

Mankin, Jim and Fikes, Jason (1996) When Shall I Reach That Happy Place? Apocalyptic Themes in the Hymns of the Stone-Campbell Movement, Restoration Quarterly: Vol. 38 : No. 1. This repository hosts selected Restoration Quarterly articles in downloadable PDF format. For the benefit of users who would like to browse the contents of RQ, we have included all issue covers even when full-text articles from that issue are unavailable. All Restoration Quarterly articles are available in full text in the ATLA Religion Database, available through most university and theological libraries or through your local library’s inter-library loan service

Advanced Manufacturing Technology

No abstract availabl

Additively Manufactured Oxidizer Turbopump

Additive Manufacturing, or 3D printing, is a key technology for enhancing rocket engine designs and making them more affordable for future exploration missions. The Oxidzer Turbopump (OTP) offers the ability to demonstrate additively manufactured rotating, vaned, and critical pressure vessel components in relevant oxygen turbopump environments. The additively manufactured components of the OTP include the main housings, impeller, and turbine components. A key technology development goal is to understand the benefits and limitations of additive manufacturing as it applies to the complex geometries needed for a rocket engine turbopump