Saint Anselm College

About: Saint Anselm College is a education organization based out in Manchester, New Hampshire, United States. It is known for research contribution in the topics: Nurse education & Extinction (psychology). The organization has 255 authors who have published 522 publications receiving 7222 citations.

A Quasi-realist Synthesis Investigating Professional Breastfeeding Support Failure

Abstract: Background/Purpose: To conduct a synthesis based on a realist perspective, -investigating how professional breastfeeding support can sometimes be ineffective and/or unsatisfactory from the viewpoint of the mother and fail to address the needs of the breastfeeding dyad. Methods: An innovative, targeted "quasi-realist" -synthesis technique was used to explore the context of the interpersonal relationships through which professional breastfeeding intervention is delivered and identify any unintended mechanisms and/or consequences. Results: Multiple expressions of failed breastfeeding support were revealed which had a negative impact on maternal empowerment, informed decision-making, and breastfeeding self-efficacy. The overarching theme, inadequate breastfeeding information/ support, was elucidated by several subthemes: giving inconsistent/contradictory advice, use of the hands-on approach, provision of insensitive care, and making parents feel scrutinized/judged Mothers who experienced inadequate breastfeeding information/support often resorted to the mechanism of duplicity/evasion and withdrew from seeking or following further professional advice. Finally, unintended consequences of not breastfeeding as recommended included feelings of guilt and a sense of failure This was particularly true for mothers who intended to exclusively breastfeed. Implications for Practice: The findings of this unique synthesis suggest that to sustain breastfeeding support relationships and prevent unintentional consequences of inadequate support, professionals must pay more attention to the manner in which breastfeeding intervention is provided. The findings also suggest that they must strive to provide more consistent, engaging, -sensitive, and nonjudgmental care that better meets the needs of breastfeeding dyads.

Ontogenetic Shifts in Oxygen Uptake in Common Mudskipper (Periophthalmus kalolo) and its Role in Microhabitat Selection

Abstract: Aims: The common mudskipper, Periophthalmus kalolo is a tropical, amphibious fish that utilizes both air and water as a respiratory medium. Adult oxygen uptake in water and air is well studied, but requirements of post-metamorphosed fish are virtually unknown. Our study quantifies how ontogenetic shifts across mudskipper life stage affects microhabitat choice. Study Design: metabolic rates in air and water were estimated for common mudskippers with mass values from 0.03 to 28.9 grams. Fish in each media were divided into 5 standard length classes (≤ 2.00, 2.01-4.00, 4.01-6.00, 6.01-8.00, ≥ 8.01 cm). Oxygen consumption for each class was calculated as the mean individual oxygen consumption for the group. Place and Duration of Study: Hoga Research Laboratory, Wakatobi National Park, Sulawesi, Indonesia, between June 14 and August 26, 2005. Methodology: Gilson manometry, and flow-through respirometery was used to determine respective aerial and aquatic oxygen uptake values for common mudskippers Results: Mudskipper lengths varied by an order of magnitude (1.0 to 10.3 cm) and mass varied by three orders of magnitude (0.03 to 17.3 g). Mass-adjusted aerial metabolic rates of fish 2.00 cm or less in length, consumed up to ten times more oxygen than larger fish. whereas, aerial consumption values for size classes 2.01 cm and above did not differ significantly from each other (ANOVA: F4 ,112 = 40.29, P < 0.0001; SNK, α = 0.05). Metabolic rates of submerged fish fell into two statistically distinct subsets. mudskippers with lengths of 4.00 cm or less had significantly higher metabolic rates than fish in remaining size classes; however, mean oxygen uptake values of fish within subsets did not differ significantly (ANOVA: F4,87 = 6.89, P < 0.0001; SNK, α = 0.05). When oxygen consumption values at each size 2.00 cm) differed significantlyclass were compared, only the smallest mudskipper size class ( between air and water (t-test: df = 34, t = 3.44, P < 0.0001). Mudskippers 2 cm in standard length or smaller consumed over seven times more oxygen in air than water. All other size classes had similar rates of oxygen uptake in air and water and air:water oxygen uptake ratios fell to approximately 1:1. Conclusions: (1) Common mudskippers select different mangal habitats based on developmental life stage. (2) Small, post-metamorphosed fish

Intrinsic ratchets: A Hamiltonian approach

Abstract: An asymmetric Brownian particle subjected to an external time-dependent force may acquire a net drift velocity and thus operate as a motor or ratchet, even if the external force is represented by an unbiased time-periodic function or by a zero-centered noise. For an adequate description of such ratchets, a conventional Langevin equation linear in the particle's velocity is insufficient, and one needs to take into account the first nonlinear correction to the dissipation force which emerges beyond the weak coupling limit. We derived microscopically the relevant nonlinear Langevin equation by extending the standard projection operation technique beyond the weak coupling limit. The particle is modeled as a rigid cluster of atoms and its asymmetry may be geometrical, compositional (when a cluster is composed of atoms of different types), or due to a combination of both factors. The drift velocity is quadratic in the external force's amplitude and increases with decreasing the force's frequency (for a periodic force) and inverse correlation time (for a fluctuating force). The maximum value of the drift velocity is independent on the particle's mass and achieved in the adiabatic limit, i.e., for an infinitely slow change of the external field.