STS-26 solid rocket booster post flight structural assessment

A post flight assessment of the Space Shuttle's Solid Rocket Boosters was conducted at the John F. Kennedy Space Center in Florida after the launch of STS-26. The two boosters were inspected for structural damage and the results of this inspection are presented. Overall, the boosters were in good condition. However, there was some minor damage attributed to splash down. Some of this damage is a recurring problem. Explanations of these problems are provided

Molecular lesions associated with white gene mutations induced by I-R hybrid dysgenesis in Drosophila melanogaster

We have identified molecular lesions associated with six mutations, w(IR2) and w(IR4-8), of the white gene of Drosophila melanogaster. These mutations arose in flies subject to I-R hybrid dysgenesis. Four of the mutations give rise to coloured eyes and are associated with insertions of 5.4-kb elements indistinguishable from the I factor controlling I-R dysgenesis. The insertion associated with w(IR4) is at a site which, within the resolution of these experiments, is identical to that of two previously studied I factors. This appears to be a hot-spot for I factor insertion. We have compared the sites of these insertions with sequences complementary to white gene mRNA identified by Pirrotta and Bröckl. The hot-spot is in the fourth intron. The insertion carried by w(IR5) is either within, or just beyond, the last exon. The insertion carried by w(IR6) is near the junction of the first exon and first intron. The w(IR2) mutation is a derivative of w(1). It contains an insertion of I factor DNA within, or immediately adjacent to, the F-like element associated with w(1), and results in restoration of some eye colour. This insertion is just upstream of the start of the white mRNA. Mutations w(IR7) and w(IR8) are deletions removing mRNA coding sequences. Both determine a bleached white phenotype

Crystallization of a Mos1 transposase-inverted-repeat DNA complex: biochemical and preliminary crystallographic analyses

A complex formed between Mos1 transposase and its inverted-repeat DNA has been crystallized. The crystals diffract to 3.25 Å resolution and exhibit monoclinic (P2(1)) symmetry, with unit-cell parameters a = 120.8, b = 85.1, c = 131.6 Å, β = 99.3°. The X-ray diffraction data display noncrystallographic twofold symmetry and characteristic dsDNA diffraction at ∼3.3 Å. Biochemical analyses confirmed the presence of DNA and full-length protein in the crystals. The relationship between the axis of noncrystallographic symmetry, the unit-cell axes and the DNA diffraction pattern are discussed. The data are consistent with the previously proposed model of the paired-ends complex containing a dimer of the transposase

Knowledge sharing in the introduction of a new technology: psychological contracts, subculture interactions and non-codified knowledge in CRM systems

This longitudinal comparative study using a multidisciplinary approach, applies a processual analysis (Pettigrew, 1985; Pettigrew, 1990; Pettigrew, 1997) from a knowledge sharing perspective, to the implementation of what the literature shows to be a relatively under researched area of Customer Relationship Management( CRM) systemsi n contemporary (2001-2004) situations within Birmingham City Council and IBM. A specific focus is given to areas neglected in previous CRM studies - sub-cultures, psychological contracts, how tacit/non-codified knowledge is surfaced and shared, and with what effects on implementation. It investigates how the system stakeholders and the information system (IS) itself evolved through encountering barriers, sharing knowledge, finding new uses and inventing workarounds. A rich picture emerges of how sub-cultural silos of knowledge linked with psychological contracts and power-based relationships influence and inhibit adoption and acceptance of the CRM system. A major contribution of this processual study is to focus on the relatively neglected 'R' in CRM systems implementations. Hitherto, there has been little attempt to analyse the micro elements in the implementation of CRM systems using the lens of a multidisciplinary approach in a longitudinal study. The investigation of knowledge sharing (in particular non-codified knowledge sharing) across the key sub-cultures in the implementation process of CRM systems remains understudied. Scholars such as Lawrence and Lorch (1967), Boland and Tenkasi (1996), Newell et al. (2002) and Iansiti (1993) write of 'knowing of what. others know', 'mutual perspective taking', 'shared mental space' and 'T- shaped skills', as aids to tacit /non-codified knowledge sharing. However, they do not address fully the micro processes that lead to the above. This research aims to fill this knowledge gap, by investigating the micro elements (including in our study the psychological contracts) that lead to 'mutual perspective taking', enabling tacit/noncodified knowledge sharing across the key sub-cultures and their impacts on the adaptation and acceptance of a CRM system. This processual study lays a strong foundation for further research along the route of investigating multiple micro level elements in the process of implementation of a CRM system in order to enhance understanding of such phenomena in a contemporary situation. This qualitative study compares the CRM implementations at IBM. COM and Birmingham City Council. It penetrates the knowledge sharing issues faced by practitioners in a system integration environment. We highlight and discuss the importance of psychological contracts and their interdependencies on sub-cultural interactions and knowledge sharing. We have been able to relate and discuss real life issues in the light of existing academic theories, in order to enhance our understanding of the relatively neglected knowledge sharing phenomena in a CRM environment. The processual analysis framework extensively used and further developed in this research provides keys to its further use in enhancing the richness of future IS implementation studies at a micro level. The research contributes to the study of IS development by providing an integrative approach investigating the existing academic understandings at a micro level in a contemporary situation. A major contribution is also a detailed insight into the process of Boland and Tenkasi's (1996) 'mutual perspective taking' through the investigation of psychological contracts and their interdependencies on sub-cultural interaction and knowledges haring. An interesting finding has been that the distinctive contexts of the two cases have had lesser effects than the distinctive nature of CRM Systems and the implementation processes adopted. The study shows that irrespective of sectoral backgrounds the two organisations studied in this research failed to address adequately a range of common issues related to human behaviour, psychology, organisational characteristics, sub-cultural interactions and knowledge sharing. According to our research findings these factors have greater explanatory power for the results achieved than the distinctive contexts in which the two organisations operated

Deployment of a pair of 3M telescopes in Utah

Journal ArticleTwo 3m telescopes are being installed in Grantsville Utah. They are intended for the testing of various approaches to the implementation of intensity interferometry using Cherenkov Telescopes in large arrays as receivers as well as for the testing of novel technology cameras and electronics for ground based gamma-ray astronomy