Analysis and correlation of the test data from an advanced technology rotor system

Comparisons were made of the performance and blade vibratory loads characteristics for an advanced rotor system as predicted by analysis and as measured in a 1/5 scale model wind tunnel test, a full scale model wind tunnel test and flight test. The accuracy with which the various tools available at the various stages in the design/development process (analysis, model test etc.) could predict final characteristics as measured on the aircraft was determined. The accuracy of the analyses in predicting the effects of systematic tip planform variations investigated in the full scale wind tunnel test was evaluated

Geographies of digital skill.

In an era of rapid technological change, especially considering the rise of robotics and AI, there is widespread anxiety about the impacts of digital technologies across a vast range of industries. Policy responses to this changing employment landscape champion the necessity for growing ‘digital skills’. However, we argue that these dominant macropolitical interpretations draw on a restricted understanding of spatiality where digital skills are discretely located in particular bodies and in particular geographical locations. The paper develops a novel geographical response through an exploration of the micropolitics of digital skills. This focuses on the material and practical dimensions of work with digital technologies that produces a more dynamic spatiality and thus a more complex politics of labour. We argue that the dynamic spatiality of digital skills can be evaluated according to: (1) site-specific dimensions, as digital skills are co-minglings of humans and technologies; (2) extensive dimensions, as digital skills are networked across geographically dispersed sites; and (3) intensive dimensions, as digital skills emerge across bodies and environments through repetitive practices. This analysis suggests that policy declarations of digital skills ‘shortages’ are problematic, since they overlook the contested and shifting forms of enablement and constraint that labour practices involving digital technologies give rise to. Unpacking this labour politics therefore requires geographical approaches that are adept at grasping these complex spatialities of labour

Geographies of digital skill

In an era of rapid technological change, especially considering the rise of robotics and AI, there is widespread anxiety about the impacts of digital technologies across a vast range of industries. Policy responses to this changing employment landscape champion the necessity for growing ‘digital skills’. However, we argue that these dominant macropolitical interpretations draw on a restricted understanding of spatiality where digital skills are discretely located in particular bodies and in particular geographical locations. The paper develops a novel geographical response through an exploration of the micropolitics of digital skills. This focuses on the material and practical dimensions of work with digital technologies that produces a more dynamic spatiality and thus a more complex politics of labour. We argue that the dynamic spatiality of digital skills can be evaluated according to: (1) site-specific dimensions, as digital skills are co-minglings of humans and technologies; (2) extensive dimensions, as digital skills are networked across geographically dispersed sites; and (3) intensive dimensions, as digital skills emerge across bodies and environments through repetitive practices. This analysis suggests that policy declarations of digital skills ‘shortages’ are problematic, since they overlook the contested and shifting forms of enablement and constraint that labour practices involving digital technologies give rise to. Unpacking this labour politics therefore requires geographical approaches that are adept at grasping these complex spatialities of labour

Low-speed inducers for cryogenic upper-stage engines

Two-phase, low-speed hydrogen and oxygen inducers driven by electric motors and applicable to the tug engine were designed and constructed. The oxygen inducer was tested in liquid and two-phase oxygen. Its head and flow performance were approximately as designed, and it was able to accelerate to full speed in 3 seconds and produce its design flow and head. The analysis of the two-phase data indicated that the inducer was able to pump with vapor volume fractions in excess of 60 percent. The pump met all of its requirements (duration of runs and number of starts) to demonstrate its mechanical integrity

Solitude, Silence, and the Training of Psychotherapists: A Preliminary Study

The spiritual disciplines of silence and solitude have long been practiced within the contemplative Christian tradition as a means of character transformation and experiencing God. Do these disciplines affect the use of silence in psychotherapy for Christian clinicians in a graduate training program? Nineteen graduate students in clinical psychology were assigned to a wait-list control condition or a training program involving the disciplines of solitude and silence, and the groups were reversed after the ftrst cohort completed the spiritual disciplines training. One group, which was coincidentally comprised of more introverted individuals, demonstrated a striking increase in the number of silent periods and total duration of silence during simulated psychotherapy sessions during the period of training. The other group, more extraverted in nature, did not show significant changes in therapeutic silence during the training. These results cause us to pose research questions regarding the interaction of personality characteristics and spiritual disciplines in training Christian psychotherapists

MORPHOLOGY AND FUNCTION OF CELLS OF HUMAN EMBRYONIC LIVER IN MONOLAYER CULTURE

A system for culturing human fetal liver cells in monolayers is described and the effects of various conditions of growth on the morphology and function of the cultured cells are presented. The addition of 10% calf serum or 1% human serum to the growth medium accelerated the proliferation of the liver cells, with subsequent loss of characteristic morphology and specific functional activity. In the absence of serum, the cultured liver cells retained their morphology and their function for at least 4 wk, as evidenced by secretion of serum albumin and storage of glycogen and iron