Refurbishment of the cryogenic coolers for the Skylab earth resources experiment package

Skylab Earth Resources Experiment Package (EREP) experiments, S191 and S192, required a cold temperature reference for operation of a spectrometer. This cold temperature reference was provided by a subminiature Stirling cycle cooler. However, the failure of the cooler to pass the qualification test made it necessary for additional cooler development, refurbishment, and qualification. A description of the failures and the cause of these failures for each of the coolers is presented. The solutions to the various failure modes are discussed along with problems which arose during the refurbishment program. The rationale and results of various tests are presented. The successful completion of the cryogenic cooler refurbishment program resulted in four of these coolers being flown on Skylab. The system operation during the flight is presented

Correlation tracking study for meter-class solar telescope on space shuttle

The theory and expected performance level of correlation trackers used to control the pointing of a solar telescope in space using white light granulation as a target were studied. Three specific trackers were modeled and their performance levels predicted for telescopes of various apertures. The performance of the computer model trackers on computer enhanced granulation photographs was evaluated. Parametric equations for predicting tracker performance are presented

A Cryogenic Helium Pressurization System for the Lunar Excursion Module

No abstract availabl

All the colours of the rainbow.

Our perception of colour has always been a source of fascination, so it's little wonder that studies of the phenomenon date back hundreds of years. What, though, can modern scientists learn from medieval literature — and how do we go about it

From theory to impact: bringing work-life initiatives into the mainstream

In this special issue we focus on the work and influence of Sue Lewis, one of the Community, Work and Family’s two founding editors. In launching this journal Sue, together with Carolyn Kagan, aimed to encourage debate and critical examination of, and reflection on, existing perspectives, frameworks and practices (Kagan and Lewis, 2015). They also explicitly aimed “to publish work that challenged the status quo, encouraged personal reflection and reflexivity, and put professional and lay views side by side” (Kagan and Lewis, 2015). For this special issue we invited researchers who have worked with Sue at different stages of her career – from her Ph.D. supervisor (Cary Cooper), some of her international research partners (Marcie Pitt-Catsouphes, Ellen Kossek), her previous colleagues at Manchester Metropolitan University (Carolyn Kagan, Rebecca Lawthom), her national and international research partners on a series of European projects (Julia Brannen, Ann Nilsen, Laura den Dulk, Bram Peper), through to one of Sue’s former Ph.D. students and colleague at Middlesex University (Uracha Chatrakul Na Ayudhya) and early career researchers (Sweta Rajan-Rankin). In the articles that are to follow, the authors draw upon and highlight the considerable and invaluable influences that Sue’s work has had in the field of Community, Work and Family

Defining, Developing, and Using Curriculum Indicators

We begin with a brief review of the lessons learned in the Reform Up Close study, a Consortium for Policy Research in Education (CPRE) project funded by the National Science Foundation, then discuss the central issues involved in defining and measuring curriculum indicators, while noting how our approach has developed over the past 10 years (1992-2002). This is followed by a discussion about using curriculum indicators in school improvement, program evaluation, and informing policy decisions

Color-coordinate system from a 13th-century account of rainbows.

We present a new analysis of Robert Grosseteste’s account of color in his treatise De iride (On the Rainbow), dating from the early 13th century. The work explores color within the 3D framework set out in Grosseteste’s De colore [see J. Opt. Soc. Am. A 29, A346 (2012)], but now links the axes of variation to observable properties of rainbows. We combine a modern understanding of the physics of rainbows and of human color perception to resolve the linguistic ambiguities of the medieval text and to interpret Grosseteste’s key terms

All the colours of the rainbow

Our perception of colour has always been a source of fascination, so it's little wonder that studies of the phenomenon date back hundreds of years. What, though, can modern scientists learn from medieval literature — and how do we go about it