Effective transition rates for epitaxial growth using fast modulation

Thin-film deposition is an industrially important process that is highly dependent on the processing conditions. Most films are grown under constant conditions, but a few studies show that modified properties may be obtained with periodic inputs. However, assessing the effects of modulation experimentally becomes impractical with increasing material complexity. Here we consider periodic conditions in which the period is short relative to the time scales of growth. We analyze a stochastic model of thin-film growth, computing effective transition rates associated with rapid periodic process parameters. Combinations of effective rates may exist that are not attainable under steady conditions, potentially enabling new film properties. An algorithm is presented to construct the periodic input for a desired set of effective transition rates. These ideas are demonstrated in three simple examples using kinetic Monte Carlo simulations of epitaxial growth

The Impact of Perceived Subgroup Formation on Transactive Memory Systems and Performance in Distributed Teams

With distributed teams becoming increasingly common in organizations, improving their performance is a critical challenge for both practitioners and researchers. This research examines how group members\u27 perception of subgroup formation affects team performance in fully distributed teams. The authors propose that individual members\u27 perception about the presence of subgroups within the team has a negative effect on team performance, which manifests itself through decreases in a team\u27s transactive memory system (TMS). Using data from 154 members of 41 fully distributed teams (where no group members were colocated), the authors found that members\u27 perceptions of the existence of subgroups impair the team\u27s TMS and its overall performance. They found these effects to be statistically significant. In addition, decreases in a group\u27s TMS partially mediate the effect of perceived subgroup formation on team performance. The authors discuss the implications of their findings for managerial action, as well as for researchers, and they propose directions for future research

X THE INFLUENCE OF SUBGROUP DYNAMICS ON KNOWLEDGE COORDINATION IN DISTRIBUTED SOFTWARE DEVELOPMENT TEAMS: A Transactive Memory System and Group Faultline Perspective

Abstract With the globalization of the software industry, distributed software teams (DSTs

A case of congenital TTP presenting with microganiopathy in adulthood

BACKGROUND: Congenital thrombotic thrombocytopenic purpura (TTP), also known as Upshaw-Schulman Syndrome is a rare inherited deficiency of ADAMTS13. Unlike the more common acquired TTP which is characterized by an acquired inhibitor of ADAMTS13, patients with congenital TTP have an absolute deficiency of ADAMTS13 without an inhibitor. Congenital TTP generally presents in infancy with repeat episodes of acute hemolysis and evidence of microangiopathy, these episodes are usually triggered by illness or physiological stress. Congenital TTP can be effectively treated with plasma infusion either during acute episodes or on a prophylactic schedule to prevent episodes. CASE PRESENTATION: We present a case of a 25 year old Caucasian woman with no know family history of hematological disorders with congenital TTP. She presented with episodes of hemolysis since infancy, but without clear evidence of microangiopathy until the age of 25. At presentation to our center the patient was documented to have thrombocytopenia, elevated creatinine, and schistocytes. She was initially treated with plasma infusion at a rate of 60 ml/hr continuously for a 24 hr period with resolution of her thrombocytopenia and hemolysis. At the time of writing this article she is maintained on a prophylactic schedule of biweekly plasma infusions at 10 mg/kg and is maintaining a normal platelet count with no evidence of hemolysis. CONCLUSION: Congenital TTP is a rare condition, and the above case is atypical as the patient did not present with clear evidence of microangiopathy until adulthood. Although this a rare condition it is important for physicians to be aware of as it, especially the possibility of atypical presentations, as the condition is potentially fatal and effective treatment exists

Collaboration in electronic resource provision in university libraries: SHEDL, a Scottish case study

This case study examines the growth of collaboration among Scottish higher education institutions. Following a summary of the work of the Scottish Confederation of University and Research Libraries (SCURL), more detailed information is provided on collaboration in the fields of acquisition, licensing, selection, and purchasing. Some of the UK background is outlined, relating to NESLi2 in particular, in order to illuminate the options within Scotland. The origins of negotiations on electronic resource provision within Scotland are described, drawing on developments in other countries including Ireland and Scandinavia. After initial setbacks, the implementation of the Scottish Higher Education Digital Library (SHEDL) from 2007 to 2009 is detailed. Current benefits arising from SHEDL are explained, and some possible future developments are discussed

Measurement of the ΔS=-ΔQ Amplitude from K_(e3)^0 Decay

We have measured the time distribution of the π^+e^-ν and π^-e^+ν modes from initial K^0's in a spark-chamber experiment performed at the Bevatron. From 1079 events between 0.2 and 7 K_S^0 lifetime, we find ReX=-0.069±0.036, ImX=+0.108_(-0.074)^(+0.092). This result is consistent with X=0 (relative probability = 0.25), but more than 4 standard deviations from the existing world average, +0.14 -0.13i

Becoming a Great Reviewer for IS Journals

The IS field needs more great reviewers. What is a great reviewer? In her June 2005 editorial for MIS Quarterly, Carol Saunders, the MISQ Editor in Chief, contrasts the gatekeeper reviewer – one who finds and surfaces fatal flaws in research – with the diamond cutter reviewer – one who polishes manuscripts so that the gems in it can surface and shine. Others have argued that a great reviewer is a champion for the paper to the journals editors – so that uncut diamonds are not lost to the field. Our field needs great reviewers of all these types (which, some would argue, are often found in the same great reviewer). This panel presents advice about how to become a great reviewer for IS journals from 4 reviewers who have been recognized as excellent reviewers by editors of various journals in the information systems field. Collectively they will present 12 key characteristics of good reviews, 12 key characteristics of a review process that will produce great reviews, and 4 very important golden rules of reviewing -- Dos and Don\u27ts. They will also distribute a list of suggested reading for those interested in learning more about how to improve their reviewing skills. During the Q&A period, audience members will be asked to write their questions down and submit them to the panel chair, who will moderate them. This should allow the maximum number of questions to be posed to the panel during a short period of time

Motor, not visual, encoding of potential reach targets

SummaryWe often encounter situations in which there are multiple potential targets for action, as when, for example, we hear the request “could you pass the …” at the dinner table. It has recently been shown that, in such situations, activity in sensorimotor brain areas represents competing reach targets in parallel prior to deciding between, and then reaching towards, one of these targets [1]. One intriguing possibility, consistent with the influential notion of action ‘affordances’ [2], is that this activity reflects movement plans towards each potential target [3]. However, an equally plausible explanation is that this activity reflects an encoding of the visual properties of the potential targets (for example, their locations or directions), prior to any target being selected and the associated movement plan being formed. Notably, previous work showing spatial averaging behaviour during reaching, in which initial movements are biased towards the midpoint of the spatial distribution of potential targets [4–6], remains equally equivocal concerning the motor versus visual encoding of reach targets. Here, using a rapid reaching task that disentangles these two competing accounts, we show that reach averaging behaviour reflects the parallel encoding of multiple competing motor plans. This provides direct evidence for theories proposing that the brain prepares multiple available movements before selecting between them [3]

Book Reviews

Book reviews by Edward F. Barrett, Edward J. Gray, David T. Link, James K. Stucko, and Thomas M. Clusserath