Induction of Cytokinin-Independent Tobacco Tissues by Substituted Fluorenes

Two morphactins and three aminofluorenes initiated the formation of compact tissue nodules in hormone-dependent tobacco callus cultures. These nodules, upon subculture, behaved like partially transformed plant tumors. They grew on cytokinin-free media, while control callus and nonnodule tissue still required an exogenous cytokinin source. The data indicate that substituted fluorenes, including carcinogenic aminofluorenes, can cause a neoplastic growth response in cultured tobacco tissues. Of particular interest in this study is the finding that a directed and heritable cellular change is induced in tobacco tissue in which a specific (the endogenous cytokinin) biosynthetic system is regularly and persistently activated

Individual emergence in contextual analysis

Located within the tradition of Hermeneutic Dialectics (HD) this paper offers an approach which can further an analysis of a fit between information and organizational systems. Drawn upon Information Systems Development projects a relationship between theory and practice is aided through a multi-disciplinary approach to sense making activity. Using a contemporary version of contextual analysis to understand a way in which individuals construct adapt and create meaning from their environment offers a route to improve a systems analysis process. This type of enquiry into contextual dependencies of knowledge creation can help direct a development of systems that have the intention to serve specific organizational actors and their needs. Combining methods outside of a traditional polar divide, sense making research undertaken within a systems thinking arena can enrich understanding by complementing qualitative and / or quantitative analysis with reflective depth. Drawing together interdisciplinary strands through a critical systems thinking approach offers new levels of professionalism for computer- and management-, practitioners or researchers in the 21st Century

Virtual personal assistant

Abstract This report discusses ways in which new technology could be harnessed to create an intelligent Virtual Personal Assistant (VPA) with a focus on user-based information. It will look at examples of intelligent programs with natural language processing that are currently available, with different categories of support, and examine the potential usefulness of one specific piece of software as a VPA. This engages the ability to communicate socially through natural language processing, holding (and analysing) information within the context of the user. It is suggested that new technologies may soon make the idea of virtual personal assistants a reality. Experiments conducted on this system, combined with user testing, have provided evidence that a basic program with natural language processing algorithms in the form of a VPA, with basic natural language processing and the ability to function without the need for other type of human input (or programming) may already be viable

Professional desire, competence and engagement in IS context

This paper attempts to address the failings of a predominant paradigm in IS research and practice that emphasises technological determinism. This paradigm makes use of a false belief in the power of rationality in organizational decision-making, and a mythology in which organizational actors can be viewed as passive ‘users’ of technology. We wish to create a discussion of the nature and role of professionalism as an expression of more than technical competence. Both system analysts and organizational stakeholders (e.g. ‘users’) are to be viewed as professionals. We discuss desire, exercise of will and their role in professional judgment in relation to transcendent values espoused within communities of practice. We go on to relate this to the environments of Information Systems research and practice. It is pointed out that many researchers, over a number of years, have dealt with these issues in relation to effective management of technological development and organizational change. The paper attempts to encourage renewed attention to interpretivist perspectives on IS development and organizational change, including recognition of the importance of contextual dependencies

Tilt Aftereffects in a Self-Organizing Model of the Primary Visual Cortex

RF-LISSOM, a self-organizing model of laterally connected orientation maps in the primary visual cortex, was used to study the psychological phenomenon known as the tilt aftereffect. The same self-organizing processes that are responsible for the long-term development of the map are shown to result in tilt aftereffects over short time scales in the adult. The model permits simultaneous observation of large numbers of neurons and connections, making it possible to relate high-level phenomena to low-level events, which is difficult to do experimentally. The results give detailed computational support for the long-standing conjecture that the direct tilt aftereffect arises from adaptive lateral interactions between feature detectors. They also make a new prediction that the indirect effect results from the normalization of synaptic efficacies during this process. The model thus provides a unified computational explanation of self-organization and both the direct and indirect tilt aftereffect in the primary visual cortex

Contextual analysis: a multiperspective inquiry into emergence of complex socio-cultural systems

This paper explores the concept of organizations as complex human activity systems, through the perspectives of alternative systemic models. The impact of alternative models on perception of individual and organizational emergence is highlighted. Using information systems development as an example of management activity, individual and collective sense-making and learning processes are discussed. Their roles in relation to information systems concepts are examined. The main locus of the paper is on individual emergence in the context of organizational systems. A case is made for the importance of attending to individual uniqueness and contextual dependency when carrying out organizational analyses, e.g. information systems analysis. One particular method for contextual inquiry, the framework for Strategic Systemic Thinking, is then introduced, The framework supports stakeholders to own and control their own analyses. This approach provides a vehicle through which multiple levels of contextual dependencies can be explored and allows for individual emergence to develop

On the complexity of collaborative cyber crime investigations

This article considers the challenges faced by digital evidence specialists when collaborating with other specialists and agencies in other jurisdictions when investigating cyber crime. The opportunities, operational environment and modus operandi of a cyber criminal are considered, with a view to developing the skills and procedural support that investigators might usefully consider in order to respond more effectively to the investigation of cyber crimes across State boundaries

Internationally Coordinated Emission Permit Policies: An Option for Withdrawers from the Kyoto Protocol?

This paper investigates the welfare costs of unilateral versus internationally coordinated emission permit policies in a two-country overlapping generations model with producer carbon emissions. We show that, for a net foreign debtor country, the domestic welfare costs of a unilateral domestic permit policy are larger than of an internationally coordinated policy if the world economy is dynamically efficient. From the perspective of a net foreign debtor country that has withdrawn from the Kyoto Protocol, an internationally coordinated permit policy is dominated by climate political inaction also in the post-Kyoto era since bearing the costs of foreign actionism is cheaper, in terms of welfare, than agreeing on international policy coordination unless the world economy becomes dynamically inefficient.emission permit policies, trade, overlapping generations, welfare

Recognising the challenge: how to realise the potential benefits of ICT use in SME’s

There is evidence to suggest that small businesses often start with innovative business ideas but fail within the first 3 years because the proprietors lack the expertise to make them thrive. In this context, it has been suggested that SMEs would benefit from support to select suitable ICTs that can help them to make the most of their business potential. Such suggestions tend to overlook a need to design a system for use of these ICTs within the context of a particular business. Technology alone solves no problems. Managers need to develop relevant expertise to exploit all the assembled resources available to them, and design of an Information System that will be experienced as useful is a prerequisite for successful development of business opportunities. While the technical aspects of e.g. data processing and storage can be consigned to a contractor, responsibility for a customer’s experience in interacting with the business cannot. It is necessary to design business processes and technologies in synergy, paying as much attention to design of effective use of ICTs as to the technologies themselves. The authors believe it is vital for the proprietors of small to medium-sized enterprises to consider what may be the unintended consequences of investment in ICTs and to devote due time and effort to development of effective systems for use