Dartmouth, MA, United States
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Etheridge F.S.,Case Western Reserve University | Fernando R.,Case Western Reserve University | Golen J.A.,UMass Dartmouth | Rheingold A.L.,University of California at San Diego | Sauve G.,Case Western Reserve University
RSC Advances | Year: 2015

Selective sulfur substitution of the distal carbonyls of a core-substituted naphthalene diimide was obtained when a combination of core and imide substituents were used. The substituents appear to inhibit thionation of the proximal carbonyl by steric hindrance. Each thionation caused a 50 nm bathochromic shift of the visible absorption band and an anodic shift of the reduction potentials. The dithionated compound has a λmax in the near-IR at 733 nm and an optical gap of 1.59 eV, which is unusually low for this type of molecule. Thionation of carbonyls offers a useful avenue for tuning optoelectronic properties of NDI-based materials. © The Royal Society of Chemistry 2015.


Randic S.,UMass Dartmouth | Connor R.C.,UMass Dartmouth | Connor R.C.,University of New South Wales | Sherwin W.B.,University of New South Wales | And 2 more authors.
Proceedings of the Royal Society B: Biological Sciences | Year: 2012

Terrestrial mammals with differentiated social relationships live in 'semi-closed groups' that occasionally accept new members emigrating from other groups. Bottlenose dolphins (Tursiops sp.) in Shark Bay, Western Australia, exhibit a fission-fusion grouping pattern with strongly differentiated relationships, including nested male alliances. Previous studies failed to detect a group membership 'boundary', suggesting that the dolphins live in an open social network. However, two alternative hypotheses have not been excluded. The community defence model posits that the dolphins live in a large semi-closed 'chimpanzee- like' community defended by males and predicts that a dominant alliance(s) will range over the entire community range. The mating season defence model predicts that alliances will defend matingseason territories or sets of females. Here, both models are tested and rejected: no alliances ranged over the entire community range and alliances showed extensive overlap in mating season ranges and consorted females. The Shark Bay dolphins, therefore, present a combination of traits that is unique among mammals: complex male alliances in an open social network. The open social network of dolphins is linked to their relatively low costs of locomotion. This reveals a surprising and previously unrecognized convergence between adaptations reducing travel costs and complex intergroup-alliance relationships in dolphins, elephants and humans. © 2012 The Royal Society.


Connor R.C.,UMASS Dartmouth | Watson-Capps J.J.,University of Colorado at Boulder | Sherwin W.B.,University of New South Wales | Krutzen M.,University of Zürich
Biology Letters | Year: 2011

Male bottlenose dolphins in Shark Bay, Western Australia form two levels of alliances; two to three males cooperate to herd individual females and teams of greater than three males compete with other groups for females. Previous observation suggested two alliance tactics: small four to six member teams of relatives that formed stable pairs or trios and unrelated males in a large 14-member second-order alliance that had labile trio formation. Here, we present evidence for a third level of alliance formation, a continuum of second-order alliance sizes and no relationship between first-order alliance stability and second-order alliance size. These findings challenge the 'two alliance tactics' hypothesis and add to the evidence that Shark Bay male bottlenose dolphins engage in alliance formation that likely places considerable demands on their social cognition. © 2011 The Royal Society.


Savaria D.T.,Naval Undersea Warfare Center | Balasubramanian R.,UMass Dartmouth
IEEE International Conference on Multisensor Fusion and Integration for Intelligent Systems | Year: 2010

Simultaneous localization and map building (SLAM) is a desired feature for autonomous mobile robots. This SLAM approach allows the robot to create a map on the fly and then backtrack to further explore the area without human interaction. Data from the robot's encoder and sonar sensors are used along with depth information from a stereo camera vision system to explore and map the surroundings. The Speeded Up Robust Features algorithm (SURF) is used to visually identify landmarks in the environment. © 2010 IEEE.


Salvucci M.V.,Deprtment of Mechanical Engineering | Rice J.M.,Deprtment of Mechanical Engineering | Kim Y.K.,UMass Dartmouth
Fiber Society Spring 2014 Technical Conference: Fibers for Progress | Year: 2014

Carbon laminar composites have advantages of very high specific strength and modulus over metal alloys. However their through-thickness thermal conductivity (TTC) is the same order of matrix resin used (∼ 0.2 W/m°K). We report significant approximately 450 % improvement in TTC of carbon composites by flocking short Z-axis carbon fiber together with a conductive interfacial boundary layer of modified matrix resin system.


Holtta-Otto K.,UMass Dartmouth | Chiriac N.A.,UMass Dartmouth | Lysy D.,Xerox | Suk Suh E.,Xerox
Journal of Engineering Design | Year: 2012

Modular design has become a widely accepted developmental strategy to create products and systems that can be easily manufactured, upgraded and maintained. In order to achieve these benefits through improvement of a system's modularity, it must be measured. An ideal measure ought to capture modularity while being independent of other architectural factors such as size, system coupling density or the number of modules. In this work, we review past research on modularity measures. Eight modularity measures are selected for a detailed analysis. We use a design of experiments approach to analyse which metrics best measure the degree of modularity independent of other irrelevant factors. To do this, we conduct a factorial analysis of 24 canonical architectures with idealised modularity, including precisely integral, modular and bus architectures. We find that most measures produce inconsistent results, especially if the system architecture contains a bus or modules with loose internal coupling. We identify the metrics that are able to capture the degree of modularity in the most consistent manner. © 2012 Copyright Taylor and Francis Group, LLC.


Connor R.C.,UMASS Dartmouth
Philosophical Transactions of the Royal Society B: Biological Sciences | Year: 2010

Players in Axelrod and Hamilton's model of cooperation were not only in a Prisoner's Dilemma, but by definition, they were also trapped in a dyad. But animals are rarely so restricted and even the option to interact with third parties allows individuals to escape from the Prisoner's Dilemma into a much more interesting and varied world of cooperation, from the apparently rare 'parcelling' to the widespread phenomenon of market effects. Our understanding of by-product mutualism, pseudo-reciprocity and the snowdrift game is also enriched by thinking 'beyond the dyad'. The concepts of by-product mutualism and pseudo-reciprocity force us to think again about our basic definitions of cooperative behaviour (behaviour by a single individual) and cooperation (the outcome of an interaction between two or more individuals). Reciprocity is surprisingly rare outside of humans, even among large-brained 'intelligent' birds and mammals. Are humans unique in having extensive cooperative interactions among non-kin and an integrated cognitive system for mediating reciprocity? Perhaps, but our best chance for finding a similar phenomenon may be in delphinids, which also live in large societies with extensive cooperative interactions among non-relatives. A system of nested male alliances in bottlenose dolphins illustrates the potential and difficulties of finding a complex system of cooperation close to our own. © 2010 The Royal Society.


Jenkins S.,UMass Dartmouth | Goodman M.,UMass Dartmouth
Journal of Contingencies and Crisis Management | Year: 2015

Early on Friday, 19 April 2013, officials at the University of Massachusetts Dartmouth learned that one of the Boston Marathon bombing suspects was an enrolled student. That morning, the entire campus was transformed into both a crime scene and a potential target for an act of domestic terrorism. This article examines the campus response to this crisis, based on interviews with campus officials and a review of a task force report produced to review the campus response. This case study speaks to three important issues in the crisis management literature. Having a crisis plan helps (1), but testing of these plans is critical for an effective response (2). Furthermore, the plan must allow for real-time decision making that is both centralized and decentralized (3). © 2015 John Wiley & Sons Ltd.


PubMed | UMass Dartmouth
Type: Journal Article | Journal: Proceedings. Biological sciences | Year: 2012

Terrestrial mammals with differentiated social relationships live in semi-closed groups that occasionally accept new members emigrating from other groups. Bottlenose dolphins (Tursiops sp.) in Shark Bay, Western Australia, exhibit a fission-fusion grouping pattern with strongly differentiated relationships, including nested male alliances. Previous studies failed to detect a group membership boundary, suggesting that the dolphins live in an open social network. However, two alternative hypotheses have not been excluded. The community defence model posits that the dolphins live in a large semi-closed chimpanzee-like community defended by males and predicts that a dominant alliance(s) will range over the entire community range. The mating season defence model predicts that alliances will defend mating-season territories or sets of females. Here, both models are tested and rejected: no alliances ranged over the entire community range and alliances showed extensive overlap in mating season ranges and consorted females. The Shark Bay dolphins, therefore, present a combination of traits that is unique among mammals: complex male alliances in an open social network. The open social network of dolphins is linked to their relatively low costs of locomotion. This reveals a surprising and previously unrecognized convergence between adaptations reducing travel costs and complex intergroup-alliance relationships in dolphins, elephants and humans.


PubMed | UMASS Dartmouth
Type: Journal Article | Journal: Nursing education perspectives | Year: 2013

To determine the extent to which safety and quality improvement core competency development occurs in an undergraduate nursing program.Rapid change and increased complexity of health care environments demands that health care professionals are adequately prepared to provide high quality, safe care.A gap analysis compared the present state of competency development to a desirable (ideal) state. The core competencies, Nurse of the Future Nursing Core Competencies, reflect the ideal state and represent minimal expectations for entry into practice from pre-licensure programs.Findings from the gap analysis suggest significant strengths in numerous competency domains, deficiencies in two competency domains, and areas of redundancy in the curriculum.Gap analysis provides valuable data to direct curriculum revision. Opportunities for competency development were identified, and strategies were created jointly with the practice partner, thereby enhancing relevant knowledge, attitudes, and skills nurses need for clinical practice currently and in the future.

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