401 research outputs found
Ethical theory and stakeholder-related decisions: The role of stakeholder culture
We use convergent elements of major ethical theories to create a typology of corporate stakeholder cultures—the aspects of organizational culture consisting of the beliefs, values, and practices that have evolved for solving problems and otherwise managing stakeholder relationships. We describe five stakeholder cultures—agency, corporate egoist, instrumentalist, moralist, and altruist—and explain how these cultures lie on a continuum, ranging from individually self-interested (agency culture) to fully other-regarding (altruist culture). We demonstrate the utility of our framework by showing how it can refine stakeholder salience theory
Dopexamine reduces the incidence of colonic ischaemia following aortic surgery: a randomized placebo controlled study
Biallelic interferon regulatory factor 8 mutation: A complex immunodeficiency syndrome with dendritic cell deficiency, monocytopenia, and immune dysregulation
Background: The homozygous K108E mutation of interferon regulatory factor 8 (IRF8) is reported to cause dendritic cell (DC) and monocyte deficiency. However, more widespread immune dysfunction is predicted from the multiple roles ascribed to IRF8 in immune cell development and function.
Objective: We sought to describe the effect on hematopoiesis and immunity of the compound heterozygous R83C/R291Q mutation of IRF8, which is present in a patient with recurrent viral infection, granuloproliferation, and intracerebral calcification.
Methods: Variant IRF8 alleles were identified by means of exome sequencing, and their function was tested by using reporter assays. The cellular phenotype was studied in detail by using flow cytometry, functional immunologic assay transcriptional profiling, and antigen receptor profiling.
Results: Both mutations affected conserved residues, and R291Q is orthologous to R294, which is mutated in the BXH2 IRF8-deficient mouse. R83C showed reduced nuclear translocation, and neither mutant was able to regulate the Ets/IRF composite element or interferon-stimulated response element, whereas R291Q retained BATF/JUN interactions. DC deficiency and monocytopenia were observed in blood, dermis, and lung lavage fluid. Granulocytes were consistently increased, dysplastic, and hypofunctional. Natural killer cell development and maturation were arrested. TH1, TH17, and CD8+ memory T-cell differentiation was significantly reduced, and T cells did not express CXCR3. B-cell development was impaired, with fewer memory cells, reduced class-switching, and lower frequency and complexity of somatic hypermutation. Cell-specific gene expression was widely disturbed in interferon- and IRF8-regulated transcripts.
Conclusions: This analysis defines the clinical features of human biallelic IRF8 deficiency, revealing a complex immunodeficiency syndrome caused by DC and monocyte deficiency combined with widespread immune dysregulation
Thirty Years After Michael E. Porter: What Do We Know About Business Exit?
Although a business exit is an important corporate change initiative, the buyer’s side seems to be more appealing to management researchers than the seller’s because acquisitions imply growth, i.e., success. Yet from an optimistic viewpoint, business exit can effectively create value for the selling company. In this paper we attempt to bring the relevance of the seller’s side back into our consciousness by asking: What do we know about business exit? We start our exploration with Porter (1976), focusing on literature that investigates the antecedents of, barriers to, and outcomes of business exit. We also include studies from related fields such as finance and economics.1 Through this research we determine three clusters of findings: factors promoting business exit, exit barriers, and exit outcomes. Overall, it is the intention of this paper to highlight the importance of business exit for research and practice. Knowing what we know about business exits and their high financial value we should bear in mind that exit need not mean failure but a new beginning for a corporation
The assessment of information technology maturity in emergency response organizations
[EN] In emergency response organizations, information technologies are not
adequately explored. Sometimes, the mere adoption of new information technologies
is not productive, as their efficient use depends on other interrelated technologies and
the environment where they are installed. This work describes a model to help organizations
understand their capability in respect to the adoption of these technologies.
The model also helps the performing of the evaluation from different perspectives,
making it suitable to collaborative evaluation. Using the proposed model, an organization
can measure its maturity level in different aspects of the evaluation and guide
the investment on its capabilities. Part of the model has been developed for emergency
response organizations and the information technology dimension of the model has
been applied to two fire department installations.Marcos R. S. Borges was partially supported by grants No. 560223/2010-2 and 480461/2009-0 from CNPq (Brazil). Work of José H. Canós is partially funded by the Spanish Ministerio. de Educación y Ciencia (MEC) under grant TIPEX (TIN2010–19859-C03-03). The cooperation between
the Brazilian and the Spanish research groups was partially sponsored by the CAPES/MECD Cooperation Program, Project #169/ PHB2007-0064-PC.Santos, RS.; Borges, MRS.; Canos Cerda, JH.; Gomes, JO. (2011). The assessment of information technology maturity in emergency response organizations. Group Decision and Negotiation. 20(5):593-613. doi:10.1007/s10726-011-9232-zS593613205Bigley G, Roberts KH (2001) The incident command system: high reliability organizing for complex and volatile task environments. Acad Manag J 44(6): 1281–1299Chinowsky P, Molenaar K, Realph A (2007) Learning organizations in construction. J Manag Eng 23(1): 27–34Diniz VB, Borges MRS, Gomes JO, Canós JH (2008) Decision making support in emergency response. In: Encyclopedia of decision making, Information Science Reference (an imprint of IGI Global), New York, pp 184–191Dörner R, Grimm P, Seiler C (2001) ETOILE—an environment for team, organizational and individual learning. CG Top 13(3): 5–6Dykstra E (2003) Concept paper: toward an international system model in emergency management. In: Proceedings of toward an international system model in emergency management, Public Entity Risk InstituteFederal Emergency Management Agency (FEMA) (1998) Emergency management guide for business and industry: a step-by-step approach to emergency planning, response and recovery for companies of all sizesGu Q, Mendonça D (2005) Patterns of group information seeking in a simulated emergency response environment. In: Proceedings of the 2nd international ISCRAM conference, Brussels, BelgiumHale J (1997) A layered communication architecture for the support of crisis response. J Manag Inf Syst 14(1): 235–255King W, Teo T (1997) Integration between business planning and information systems planning: validating a stage hypothesis. Decis Sci 28(2): 279–307Lachner J, Hellwagner H (2008) Information and communication systems for mobile emergency response. Lecture notes in business information processing, vol 5. pp 213–224Lavoie D, Culbert A (1978) Stages in organization and development. Human Relat 31(5): 417–438Lindel MK, Prater C, Perry RW (2007) Emergency management. Wiley, New YorkLlavador M, Letelier P, Penadés MC, Borges MRS, SolÃs C (2006) Precise yet flexible specification of emergency resolution procedures. In: Proceedings of the information systems for crisis response and management (ISCRAM), pp 110–120Meissner A, Wang Z, Putz W, Grimmer J (2006) MIKoBOS: a mobile information and communication system for emergency response. In: Proceedings of the 3rd international ISCRAM conference, Newark, New JerseyNonaka I, Takeuchi H (1995) The knowledge creating company: how Japanese companies create the dynamics of innovation. Oxford University Press, OxfordOchoa S, Neyem A, Pino JA, Borges MRS (2007) Supporting group decision making and coordination in urban disasters relief efforts. J Decis Syst 16(2): 143–172Paton D, Flin R (1999) Disaster stress: an emergency management perspective. Disaster Prev Manag 8(4): 261–267Paulk MC, Weber C, Curtis B, Chrissis M (1995) The capability maturity model: guidelines for improving the software process. Addison-Wesley, ReadingQuarantelli EL (1997) Problematical aspects of the information/communication revolution for disaster planning and research: ten non-technical issues and questions. Disaster Prev Manag 6(2): 94–106Santos RS, Borges MRS, Gomes JO, Canós JH (2008) Maturity levels of information technologies in emergency response organizations. In: Proceedings of the international workshop on groupware, Omaha, Nebraska, USA. Groupware: design, implementation and use. Lecture notes in computer science, vol 5411. Springer, Berlin, pp 135–150Schoenharl T, Szabo G, Madey G, Barabasi AL (2006) WIPER: a multi-agent system for emergency response. In: Proceedings of the 3rd international ISCRAM conference, Newark, New JerseyTuroff M (2002) Past and future emergency response information systems. Commun ACM 45(4): 29–33Turoff M, Chumer M, Hiltz R, Clasher R, Alles M, Vasarhelyi M, Kogan A (2004a) Assuring homeland security: continuous monitoring, control and assurance of emergency preparedness. J Inf Technol Theor Appl (JITTA) 6(3): 1–24Turoff M, Chumer M, Vande Walle B, Yao X (2004b) The design of a dynamic emergency response management information system (DERMIS). J Inf Technol Theor Appl (JITTA) 5(4): 1–35Van der Lee MDE, Van Vugt M (2004) IMI—An information system for effective multidisciplinary incident management. In: Proceedings of the 1st international ISCRAM conference, Brussels, BelgiumYuan Y, Deltor B (2005) Intelligent mobile crisis response systems. Commun ACM 28(2): 95–98Zimmerman R, Restrepo CE (2006) Information technology (IT) and critical infrastructure interdependencies for emergency response. In: Proceedings of the 3rd international ISCRAM conference, Newark, New Jerse
Imaging denervation in motor neuron disease for future clinical trials: a longitudinal cohort study
A key area-of-need in motor neuron disease/amyotrophic lateral sclerosis (MND/ALS) translational research is a tool to objectively track disease progression over short timescales, to reduce duration and cost of clinical trials. Previous studies have focused on the central nervous system
Space Telescope and Optical Reverberation Mapping Project. XII. Broad-line Region Modeling of NGC 5548
We present geometric and dynamical modeling of the broad line region (BLR) for the multi-wavelength reverberation mapping campaign focused on NGC 5548 in 2014. The data set includes photometric and spectroscopic monitoring in the optical and ultraviolet, covering the Hβ, C iv, and Ly broad emission lines. We find an extended disk-like Hβ BLR with a mixture of near-circular and outflowing gas trajectories, while the C iv and Ly BLRs are much less extended and resemble shell-like structures. There is clear radial structure in the BLR, with C iv and Ly emission arising at smaller radii than the Hβ emission. Using the three lines, we make three independent black hole mass measurements, all of which are consistent. Combining these results gives a joint inference of . We examine the effect of using the V band instead of the UV continuum light curve on the results and find a size difference that is consistent with the measured UV-optical time lag, but the other structural and kinematic parameters remain unchanged, suggesting that the V band is a suitable proxy for the ionizing continuum when exploring the BLR structure and kinematics. Finally, we compare the Hβ results to similar models of data obtained in 2008 when the active galactic nucleus was at a lower luminosity state. We find that the size of the emitting region increased during this time period, but the geometry and black hole mass remained unchanged, which confirms that the BLR kinematics suitably gauge the gravitational field of the central black hole
Space Telescope and Optical Reverberation Mapping Project. V. Optical Spectroscopic Campaign and Emission-line Analysis for NGC 5548
We present the results of an optical spectroscopic monitoring program targeting NGC 5548 as part of a larger multiwavelength reverberation mapping campaign. The campaign spanned 6 months and achieved an almost daily cadence with observations from five ground-based telescopes. The Hβ and He ii λ4686 broad emission-line light curves lag that of the 5100 +-optical continuum by 4.17+0.36-0.36 and 0.79+0.35-0.34 days, respectively. The Hβ lag relative to the 1158 ultraviolet continuum light curve measured by the Hubble Space Telescope is ∼50% longer than that measured against the optical continuum, and the lag difference is consistent with the observed lag between the optical and ultraviolet continua. This suggests that the characteristic radius of the broad-line region is ∼50% larger than the value inferred from optical data alone. We also measured velocity-resolved emission-line lags for Hβ and found a complex velocity-lag structure with shorter lags in the line wings, indicative of a broad-line region dominated by Keplerian motion. The responses of both the Hβ and He ii emission lines to the driving continuum changed significantly halfway through the campaign, a phenomenon also observed for C iv, Lyα, He ii(+O iii]), and Si iv(+O iv]) during the same monitoring period. Finally, given the optical luminosity of NGC 5548 during our campaign, the measured Hβ lag is a factor of five shorter than the expected value implied by the R BLR-L AGN relation based on the past behavior of NGC 5548
- …