Baba Chaminade

Praise of Blessed Chaminad

Direct Assessment of Juvenile Atlantic Bluefin Tuna: Integrating Sonar and Aerial Results in Support of Fishery-Incident Surveys

There is a clear need for direct assessment approaches for Atlantic bluefin tuna (Thunnus thynnus, ABFT), including formulation of experimental designs and pilot surveys for abundance estimation. In the western Atlantic, aerial surveys are highly feasible for juvenile ABFT because of their surface availability in summer and autumn on the mid-Atlantic shelf. Our goals are to design, implement, and analyze a fisheries-independent survey of juvenile ABFT and to assess the feasibility of biomass estimation in the Gulf of Maine (USA). From initial field trials using sonar and aerial mapping we demonstrated feasibility of determining size, area, and total biomass of schools as well as sizes of individuals within schools. We used aerial imagery to determine the school’s surface shape and to enumerate bluefin tuna visible in the upper few meters of the water column. The sonar data provided information on school height and number of individuals not captured in aerial photographs. By integrating sonar and aerial data we can estimate school biomass, number and sizes of individuals in schools, and aggregation behavior. In 2015 we plan to use a marine hexacopter to obtain more highly resolved aerial images of schools, with improved geo-rectification required for automated target recognition and objective counts of individuals. Current bluefin surveys rely primarily on observer and spotter pilot estimates of school metrics. Although not without challenges, the analytical techniques we’re developing will provide more objective, multi-dimensional information on ABFT schools and less biased estimates of biomass. Direct assessment also offers a means of tracking shifts in coastal distribution of highly mobile ABFT, especially as traditional indices of abundance may no longer be appropriate

Cost-effectiveness of superficial femoral artery endovascular interventions in the UK and Germany: a modelling study

Objectives: To assess the lifetime costs and cost-effectiveness of 5 endovascular interventions to treat superficial femoral arterial disease. Design: A model-based health economic evaluation. An existing decision analytical model was used, with updated effectiveness data taken from the literature, and updated costs based on purchasing prices. Setting: UK and German healthcare perspectives were considered. Participants: Patients with intermittent claudication of the femoropopliteal arteries eligible for endovascular treatment. Methods: UK and German healthcare perspectives were considered, as were different strategies for re-intervention. Interventions: Percutaneous transluminal angioplasty (PTA) with bail-out bare metal stenting (assumed to represent the existing standard of care, and 4 alternatives: primary bare metal stents, drug-eluting stents, drug-eluting balloons (DEBs) and biomimetic stents). Primary outcome measures: The incremental cost-effectiveness ratio between 2 treatments, defined as the incremental costs divided by the incremental quality-adjusted life years (QALYs). Results: Use of a biomimetic stent, BioMimics 3D, was always estimated to dominate the other interventions, having lower lifetime costs and greater effectiveness, as measured by QALYs. Of the remaining interventions, DEBs were always the most effective, and PTA the least effective. There was uncertainty in the cost-effectiveness results, with key drivers being the costs and effectiveness of the biomimetic stent along with the costs of DEBs. Conclusions: All 4 of the alternatives to PTA were more effective, with the biomimetic stent being the most cost-effective. As there was uncertainty in the results, and all of the interventions have different mechanisms of action, all 4 may be considered to be alternatives to PTA

Chemical, mineralogical and petrological characterization of Gyaza iron ore deposit, Katsina State, Nigeria

No Abstract

Keratoacanthoma management: results of a survey of UK dermatologists and surgeons.

Distinction of keratoacanthoma (KA) from squamous cell carcinoma (SCC) is challenging. Management is controversial, with some advocating prompt surgical excision and others monitoring to allow for spontaneous resolution(1) . The controversy is compounded by rare reports of metastasis(2) . And yet the benign natural history of KA is supported by various studies, including a systematic review of 455 cases with no cases of metastasis or death(1) , and observational studies confirming spontaneous resolution(1)

Lady of Fatima

In praise of Mar