Skew group algebras of piecewise hereditary algebras are piecewise hereditary

We show that the main results of Happel-Rickard-Schofield (1988) and Happel-Reiten-Smalo (1996) on piecewise hereditary algebras are coherent with the notion of group action on an algebra. Then, we take advantage of this compatibility and show that if G is a finite group acting on a piecewise hereditary algebra A over an algebraically closed field whose characteristic does not divide the order of G, then the resulting skew group algebra A[G] is also piecewise hereditary.Comment: 13 pages, typos corrected. To appear in J. Pure Appl. Algebr

The Business Value of Social Network Technologies: A Framework for Identifying Opportunities for Business Value and an Emerging Research Program

Although social network technologies have been the focus of many articles in the popular and business press, businesses remain unclear about their value. We use theory and data gathered from IT leaders to develop an initial model assessing the value of social network technologies in the business environment. Insights are given into when different features should be used to enhance existing business processes and to provide business value

Representation theory of partial relation extensions

Let C be a finite dimensional algebra of global dimension at most two. A partial relation extension is any trivial extension of C by a direct summand of its relation C-C-bimodule. When C is a tilted algebra, this construction provides an intermediate class of algebras between tilted and cluster tilted algebras. The text investigates the representation theory of partial relation extensions. When C is tilted, any complete slice in the Auslander-Reiten quiver of C embeds as a local slice in the Auslander-Reiten quiver of the partial relation extension; Moreover, a systematic way of producing partial relation extensions is introduced by considering direct sum decompositions of the potential arising from a minimal system of relations of C

Business Process Agility

Business processes are the central building blocks of how individuals, organizations, and industries participate with one another. In a dynamic environment, a firm’s ability to respond and adapt is dependent on the agility of its business processes. However, agility from a business process perspective has yet to be defined and measured. This paper refines the definition of operational agility from the IS literature and tests a conceptual model. A field study is used to evaluate a metric created for measuring business process agility and understanding the relationship between the firm’s system capabilities and management’s factors driving adoption of agile business processes

Global, Regional and Local food chains: an assessment of sustainability performance of wheat-to-bread chains across Italy and the UK

Peer reviewe

Research in Home-Care Telemedicine: Challenges in Patient Recruitment

This study reports challenges in recruiting patients for a randomized controHed trial of home-care telemedicinae. Descriptive statistics on patient eligibility for home-care telemedidne services and patient refusals for participation are provided. Frequency counts of reasons for study exclusion and participant refusal and Chi-square tests to compare race and age-related differences are given. Of 302 home-care patients reviewed, 197 (65.2%) did not meet inclusion criteria. The most common reasons for study exclusion were patients either needing \u3c2 visits per month (n = 59, 30%) or \u3e3 skilled nurse visits per week (n = 46, 23.4%). Of the eligible patients (n = 105), 79 persons (75.2%) refused participation. The most common reasons for refusals were lack of perceived addition benefit of telemedicine (n = 27, 34.2%), and that routine health care was sufficient (n = 23, 29.1%). Higher than expected proportions of patients did not meet chosen eligibility criteria or refused to participate. These results should be helpful in designing home-care telemedidne programs and clinical trials

Rebirth of Accounting Information Systems Curricula

Businesses’ increased reliance upon information technologies (for improved transaction processing, process redesign, electronic commerce, knowledge management, and other key activities) has led to new roles for corporate accountants, IT professionals, and internal and external auditors (Bell, et all, 1997; Elliott, 1994). Public accounting firms are attempting to adapt to these changes by identifying new business opportunities and developing new knowledge-management capabilities (Black, 1995). Frank Marrs, KPMG national managing partner of assurance services, recently stated: “We were offering a 100-year-old product, based on techniques that have not kept pace with the technology...” (Cheney, 1995). Marrs reports that the introduction of new, more broadly defined “assurance services” are accompanied by significant changes in strategy (e.g., broader scope of work) and organizational structure (e.g., more specialists; fewer hires of recent college graduates)

Migrant Semipalmated Sandpipers (Calidris pusilla) Have Over Four Decades Steadily Shifted Towards Safer Stopover Locations

Peregrine falcons (Falco peregrinus) have undergone a steady hemisphere-wide recovery since the ban on DDT in 1973, resulting in an ongoing increase in the level of danger posed for migrant birds, such as Arctic-breeding sandpipers. We anticipate that in response migrant semipalmated sandpipers (Calidris pusilla) have adjusted migratory behavior, including a shift in stopover site usage toward locations offering greater safety from falcon predation. We assessed semipalmated sandpiper stopover usage within the Atlantic Canada Shorebird Survey dataset. Based on 3,030 surveys (totalling ~32M birds) made during southward migration, 1974–2017, at 198 stopover locations, we assessed the spatial distribution of site usage in each year (with a “priority matching distribution” index, PMD) in relation to the size (intertidal area) and safety (proportion of a site\u27s intertidal area further than 150 m of the shoreline) of each location. The PMD index value is >1 when usage is concentrated at dangerous locations, 1.0 when usage matches location size, and <1 when usage is concentrated at safer locations. A large majority of migrants were found at the safest sites in all years, however our analysis of the PMD demonstrated that the fraction using safer sites increased over time. In 1974, 80% of birds were found at the safest 20% of the sites, while in 2017, this had increased to 97%. A sensitivity analysis shows that the shift was made specifically toward safer (and not just larger) sites. The shift as measured by a PMD index decline cannot be accounted for by possible biases inherent in the data set. We conclude that the data support the prediction that increasing predator danger has induced a shift by southbound migrant semipalmated sandpipers to safer sites

A New Way Forward for Teaching Science: A Report on the Future of the Teaching Science Journal

The Executive of the Australian Science Teachers Association is considering strategic options for the future of their journal, Teaching Science. ASTA Executive asked the research team to initiate the work around this; the first stage being a 'landscape survey' of some of the factors that need to be considered when reviewing the future of the publication and achieving maximum benefit to the members of the state and territory science teachers associations

Research in Home-Care Telemedicine: Challenges in Patient Recruitment

This study reports challenges in recruiting patients for a randomized controlled trial of homecare telemedicine. Descriptive statistics on patient eligibility for home-care telemedicine services and patient refusals for participation are provided. Frequency counts of reasons for study exclusion and participant refusal and Chi-square tests to compare race and age-related differences are given. Of 302 home-care patients reviewed, 197 (65.2%) did not meet inclusion criteria. The most common reasons for study exclusion were patients either needing 3 skilled nurse visits per week (n = 46, 23.4%). Of the eligible patients (n = 105), 79 persons (75.2%) refused participation. The most common reasons for refusals were lack of perceived addition benefit of telemedicine (n = 27, 34.2%), and that routine health care was sufficient (n = 23, 29.1%). Higher than expected proportions of patients did not meet chosen eligibility criteria or refused to participate. These results should be helpful in designing home-care telemedicine programs and clinical trials.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/63390/1/tmj.2004.10.155.pd