Transient electromagnetics for permafrost

Thesis (Ph.D.) University of Alaska Fairbanks, 1988Transient electromagnetic (TEM) soundings were carried out with a Geonics EM-37 instrument at more than forty sites in Alaska, primarily along a line from Reindeer Island to Glennallen, to investigate its application to the study of permafrost. Procedures were developed for correcting TEM sounding data for the effects of transmitter turnoff time. Best fit geoelectric models of horizontally layered earth were derived by computer inverse modeling, using program NLSTCI (Anderson, 1982), and used to interpret the soundings in terms of the thickness of permafrost at each site. The interpretations indicate permafrost thicknesses vary substantially between sounding sites on land, although the general trend of thicker permafrost at more northern latitudes is evident. Under favorable circumstances, the depth to the base of ice-bearing permafrost may be resolved within $\pm$10%. Soundings taken over sea ice indicate that the thickness of the thawed sediments overlying ice-bearing permafrost can be determined, the subsea permafrost is multilayered beyond about 3 km offshore, but that the TEM system used may not resolve the base of ice-bearing subsea permafrost in this warm, high-salinity, and multilayered environment. An anomalous, double-sign reversal was obtained at a site in the Kuparuk region which was successfully modeled using a complex resistivity of the Cole-Cole type. The model parameters indicate that this unusual signature may be related to the known deposits of gas hydrates beneath the site suggesting that deep deposits of gas hydrates may be detectable from the ground surface using the TEM method. Finally, it is noted that TEM soundings for permafrost are most productively performed in a line or grid tied to sites with known subsurface lithology so that modeling parameters may be constrained to physically reasonable values

Alien Registration- Grant, Gerald S. (Rockland, Knox County)

https://digitalmaine.com/alien_docs/16219/thumbnail.jp

Validating a questionnaire on physical environment factors associated with remote work

Digital technologies, especially information communication technologies (ICTs), make remote work a fashionable method. Remote workers can work from their homes, satellite offices, neighbourhood work centers, and even on the road. People are subjected to various physical environments when working from different places, impacting their work satisfaction, performance, and productivity. In this paper, we conducted an exploratory factor analysis to find factors in a physical environment questionnaire item pool created in a previous study. We also adjusted the factor model and tested its validity and reliability. This questionnaire will be used in research on workplace location, physical environment, and work performance

Dialectics of Routine Performance: A Framework for Investigating Technology Adoption as a Process of Routine Disruption and Renewal

Usage, though necessary for IT value generation, can be inappropriate, unexpected, changing, and often counter to the productive intentions that motivated its deployment. This paper introduces a rather novel conception of usage and adoption as a dialectic process of disruption and renewal that incorporates aspects of the IT artefact into new organizational routines. Fundamental to our contribution is the assertion that digital technology introduction disrupts established routines and that our understanding of the process through which such disruptions are resolved to produce renewed routines is not well understood. We present a dialectic framework through which to understand the interaction between organizational routine disruption and renewal processes. This works expands our ability to analyze the process through which IT effects on organizational effectiveness and performance can manifest

IT Governance in Virtual Communities: An exploration of the issues in the Caribbean context

With the increased usage of information and communication technologies (ICTs) to facilitate information sharing and exchange, there has been increased development of and participation in virtual communities. In the Caribbean context, virtual communities are being formed in various sectors (public, private, NGO) in the region for collaboration and information sharing purposes. With the reliance of virtual communities on information and communication technologies, effective IT governance may be critical to the success of a virtual community. This paper presents research which will examine the current state of IT governance in virtual communities in the Caribbean, using a research model. This research will then guide the development of an IT governance framework for virtual communities with special reference to the Caribbean context

Social Construction of Appropriate Use of Enterprise Social Media

Increasingly companies and governments are turning to enterprise versions of social software to accomplish organizational goals. Unlike public social media, access to Enterprise Social Media (ESM) is normally restricted to the organization or key strategic partners. We know from research on Information Technology (IT) value, that not only is system use necessary to achieve value, but also that this use must be appropriate. System use and specifically appropriate use has received very little attention in the literature. The nature of ESM tools and the absence of specific and detailed use guidelines creates an environment where employees are encouraged to explore means to achieve value. Thus, employees invoke a dynamic and interactive process to socially construct appropriate use. This paper draws on previous research on IT value, and legitimacy to propose a conceptual model to guide future research on how appropriate use of enterprise social media is socially constructed

A Theory of the Firm Perspective on Entrepreneurial Use of Consumer IT as Corporate IT

Why do some employees bring their own information technology (IT) to work? This behavior occurs in firms that provide considerable IT for employee use and in firms that have policies and governance that discourage employees from using consumer IT as corporate IT. In the theory of the firm, IT policy and governance are means for a firm to maximize value from its IT and to ensure employees do what they are supposed to do under their contracts. However, IT governance generally assumes that the only IT that is relevant to the firm is the IT that the firm owns. Employees can create value for the firm using their personal IT in conjunction with the firm’s. Actions like these are consistent with entrepreneurship, if the employees invest in their own IT in expectation of return. Entrepreneurship theory, however, tends to focus on founders and not employees of established firms. This paper proposes a link between the theory of the firm and entrepreneurship theory. This link is significant because it advances the notion that employees of established firms can be entrepreneurial when they use their own consumer IT as corporate IT. This link is also significant because it suggests that managing employee entrepreneurship requires tolerance of value creation that is emergent and that can occur widely within a firm, including anywhere where IT is used