108 research outputs found

    The role of organisational change management in offshore outsourcing of information technology services : qualitative case studies from a multinational pharmaceutical company

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    This research study seeks to understand the nature of organisational change with respect to offshore outsourcing of information technology services in a multinational pharmaceutical company, and to examine the effectiveness of approaches used to manage this change so that lessons may be drawn from these experiences. Despite the abundant literature on effective organisational change management, the key factors that need to be managed properly at different stages of the offshore outsourcing process are not well understood. The research adopts a processual view to paint a broad picture of the issues involved in these different stages. A generic process model of change, based on the review of the change literature, was first developed to represent how change was intended to occur. This model focuses on the following four stages in the change process: context, diagnosis and planning, implementation, and institutionalisation. The research employs an interpretive case study approach and draws on fieldwork from three independent information systems departments (cases) of the company, where offshore outsourcing programmes were implemented. Qualitative data from semi- structured interviews, direct observation and document analysis are analysed by applying the generic process model to produce a detailed account of the way in which change was managed in the case organisations. The findings reveal that a combination of contextual factors, both external and internal to the company, influenced the adoption and use of offshore outsourcing in the case organisations. Externally, the economic forces were found to be the main catalyst for the change, while internally the role of the executive leadership and the lack of internal resources further explain the motivations behind the adoption of offshore outsourcing. The study illustrates that achieving successful outcomes from offshore outsourcing activities critically depends on the organisation adequately addressing a number of factors, such as conveying a sense of urgency, developing and communicating the vision, identifying the benefits of change and how they will be delivered, generating short-term wins, providing education and training, developing a fit between the change and organisational culture, etc., throughout the change process. The findings also highlight the effects of offshore outsourcing on the case organisations, including change in job roles and responsibilities and organisational learning activities that enable corrective actions to improve change management efforts. An important contribution of this research is the development of a model providing a more comprehensive understanding of the change process associated with the implementation of offshore IT outsourcing. Recommendations for policy makers and change managers to improve change management practice based on the research findings, as well as recommendations for further research, form a significant part of the conclusions

    Bioremediation of Nitroaromatic Compounds

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    Nitroaromatics are major pollutants released in the environment during the post-industrialization era and pose toxic effects to living organisms. Several bacterial strains have been isolated for the degradation of these nitroaromatic pollutants. Some of them have been used in field trial experiments for the removal of nitroaromatics from industrial water and groundwater. Very few bacterial pathways have been characterized at genetic and molecular levels. In this review, we cover all reported degradation pathways and their gene evolution. These studies for nitroaromatics clearly indicate that most of the involved genes have evolved from preexisting enzymes by using all means of gene evolution like horizontal gene transfer, mutation, and promiscuity principle. This information has been exploited for the creation of hybrid pathways and better biocatalysts for degradation

    Depression in patients following limb reconstructive surgeries for trauma

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    Background: Psychological complications are common following physical trauma and its surgical treatment. Studies on trauma patients are mostly from the Western world and have focussed more on posttraumatic stress disorder and less on depression.Methods: This study was conducted in a tertiary referral centre for trauma in South India. One hundred patients who had undergone limb reconstructive surgeries following trauma were included in the study. The major causes of trauma were occupational accidents and road traffic accidents. Beck depression inventory II was used to diagnose depression. The severity of trauma, impairment in joint motion and sensory impairment were also determined. Association between the variables was assessed using Chi -Square/ Fisher’s exact test.Results: The prevalence of depression was found to be 36% (95% CI: 26.6-45.4). Age between 41 and 60 years, unemployment, severe degree of injury, and the period between three months and one year of trauma were found to have significant association with depression.Conclusions: Depression is common following physical trauma and its surgical treatment. Its early recognition and treatment is important to ensure faster recovery and better quality of life.

    Onset of Propagation of Planar Cracks in Heterogeneous Media

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    The dynamics of planar crack fronts in hetergeneous media near the critical load for onset of crack motion are investigated both analytically and by numerical simulations. Elasticity of the solid leads to long range stress transfer along the crack front which is non-monotonic in time due to the elastic waves in the medium. In the quasistatic limit with instantaneous stress transfer, the crack front exhibits dynamic critical phenomenon, with a second order like transition from a pinned to a moving phase as the applied load is increased through a critical value. At criticality, the crack-front is self-affine, with a roughness exponent ζ=0.34±0.02\zeta =0.34\pm 0.02. The dynamic exponent zz is found to be equal to 0.74±0.03 0.74\pm 0.03 and the correlation length exponent ν=1.52±0.02\nu =1.52\pm 0.02. These results are in good agreement with those obtained from an epsilon expansion. Sound-travel time delays in the stress transfer do not change the static exponents but the dynamic exponent zz becomes exactly one. Real elastic waves, however, lead to overshoots in the stresses above their eventual static value when one part of the crack front moves forward. Simplified models of these stress overshoots are used to show that overshoots are relevant at the depinning transition leading to a decrease in the critical load and an apparent jump in the velocity of the crack front directly to a non-zero value. In finite systems, the velocity also shows hysteretic behaviour as a function of the loading. These results suggest a first order like transition. Possible implications for real tensile cracks are discussed.Comment: 51 pages + 20 figur

    Inhibition of constitutive and cxc-chemokine-induced NF-κB activity potentiates ansamycin-based HSP90-inhibitor cytotoxicity in castrate-resistant prostate cancer cells

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    Background: We determined how CXC-chemokine signalling and necrosis factor-B (NF-B) activity affected heat-shock protein 90 (Hsp90) inhibitor (geldanamycin (GA) and 17-allylamino-demethoxygeldanamycin (17-AAG)) cytotoxicity in castrate-resistant prostate cancer (CRPC).Methods:Geldanamycin and 17-AAG toxicity, together with the CXCR2 antagonist AZ10397767 or NF-B inhibitor BAY11-7082, was assessed by 3-(4, 5-Dimethylthiazol-2-yl)-2, 5-diphenyltetrazolium bromide assay in two CRPC lines, DU145 and PC3. Flow cytometry quantified apoptotic or necrosis profiles. Necrosis factor-B activity was determined by luciferase readouts or indirectly by quantitative PCR and ELISA-based determination of CXCL8 expression.Results:Geldanamycin and 17-AAG reduced PC3 and DU145 cell viability, although PC3 cells were less sensitive. Addition of AZ10397767 increased GA (e.g., PC3 IC 20: from 1.670.4 to 0.180.2 nM) and 17-AAG (PC3 IC 20: 43.77.8 to 0.641.8 nM) potency in PC3 but not DU145 cells. Similarly, BAY11-7082 increased the potency of 17-AAG in PC3 but not in DU145 cells, correlating with the elevated constitutive NF-B activity in PC3 cells. AZ10397767 increased 17-AAG-induced apoptosis and necrosis and decreased NF-B activity/CXCL8 expression in 17-AAG-treated PC3 cells.Conclusion:Ansamycin cytotoxicity is enhanced by inhibiting NF-B activity and/or CXC-chemokine signalling in CRPC cells. Detecting and/or inhibiting NF-B activity may aid the selection and treatment response of CRPC patients to Hsp90 inhibitors.</p
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