Fish Census: Monitoring Finfish Populations in Chesapeake Bay

Grades: 9-12 Subjects: Life Science | Biology | Oceanography In this activity, students will utilize data collected from a scientific survey to explore where different fishes live in a coastal estuary, and how their populations change over time

Evaluating multiagency interventions for children living with intimate partner violence in Birmingham

This research endeavour was born out of the need for a systematic evaluation of the efficacy of the multiagency Domestic Abuse Risk Assessment tool, which necessitates that all incidents of ‘domestic abuse’ (any incident within the family domain) reported to West Midlands Police, where a child or unborn child resides within that home, are scrutinised by Police and Social Care (and partners from Health, Education and the voluntary sector where possible) using a joint protocol. The primary purpose of the protocol is to promote safeguarding and provide a timely and appropriate response to children at risk following domestic abuse. The protocol incorporates the Banardos’ Multiagency Domestic Violence Risk Identification Threshold Scales (MDVRITS), which aids decision making about appropriate interventions based on predicted risk to children using a four level scale

Signal enhancement of the in-plane and out-of-plane Rayleigh wave components

Several groups have reported an enhancement of the ultrasonic Rayleigh wave when scanning close to a surface-breaking defect in a metal sample. This enhancement may be explained as an interference effect where the waves passing directly between source and receiver interfere with those waves reflected back from the defect. We present finite element models of the predicted enhancement when approaching a defect, along with experiments performed using electromagnetic acoustic transducers sensitive to either in-plane or out-of-plane motion. A larger enhancement of the in-plane motion than the out-of-plane motion is observed and can be explained by considering ultrasonic reflections and mode conversion at the defect

Infanticide, a mother’s crime : expert evidence and infanticide cases, 1688-1955

“Infanticide: A Mother’s Crime” explores expert evidence in cases of infanticide with a view to determining the extent of certainty, created by medical men who founded their evidence on anatomical exploration and science. As the thesis progresses, it becomes clear that medical men were unable to scientifically establish cause of death, and in doing so convey certainty; instead medical men conveyed uncertainty. However, rather than being seen as a professional failing, this thesis will argue, that the uncertainty created by medical men made a positive contribution to infanticide cases. The combination of uncertainty created by medical experts and the changing perceptions of infanticidal women by the court, allowed the jury to find infanticidal women not guilty of a capital offence. A number of cases demonstrate that the jury found the women guilty of the lesser offence of concealment of birth; a favourable outcome for both the women and the collective conscience of the jury.This research begins in the year 1688 with an examination of evidence given by the midwife. In the absence of medical reasoning or discourse, she gave evidence based purely on her experience and knowledge, until the eighteenth century when the courts seemed to demand greater certainty from expert evidence. As the midwife was replaced in the courtroom by medical men, during the eighteenth century, this research will continue by drawing on the testimony of medical men, mental state experts and pathologists until its conclusion in 1955. The longevity of this research has been divided into forty or fifty year periods, allowing the testimony to be examined within each period, and timeframes to be compared over a substantial period of time. Cases have been examined both within and outside the London area, by drawing on examplesfrom the Old Bailey and Hull and the surrounding area

Phased electromagnetic acoustic transducer array for Rayleigh wave surface defect detection

A phased electromagnetic acoustic transducer (EMAT) array system has been developed for detection and characterisation of surface breaking defects. An array of four linear coils which are individually controlled are used to generate a Rayleigh wave. The high current electronics combined with the coil designs enables the array to generate either narrowband or broadband signals, and controlling the phase delay between the channels makes it possible to change the ultrasound wavelength without requiring the physical separation of the coils to be changed. Experimental results show that the four-coil phased array is able to generate a wavelength range from 3.0 mm to 11.7 mm. Surface breaking defects were characterised using a transmit-receive set-up with a broadband EMAT detector being used to detect the Rayleigh wave. Machined surface slots with different depths were used for technique validation. The results show that the array is sensitive to surface defects and that a wide depth sensitivity range for defect sizing can be easily achieved by applying phasing to tune the wavelength of operation. A large increase in detection flexibility is immediately shown

Non-linear enhancement of laser generated ultrasonic Rayleigh waves by cracks

Laser generated ultrasound has been widely used for detecting cracks, surface and sub-surface defects in many different materials. It provides a non-contact wideband excitation source which can be focused into different geometries. Previous workers have reported enhancement of the laser generated Rayleigh wave when a crack is illuminated by pulsed laser beam irradiation. We demonstrate that the enhancement observed is due to a combination of source truncation, the free boundary condition at the edge of the crack and interference effects. Generating a Rayleigh wave over a crack can lead to enhancement of the amplitude of the Rayleigh wave signal, a shift in the dominant frequency of the wideband Rayleigh wave and strong enhancement of the high frequency components of the Rayleigh wave

On We Go, with Hope: Remembering Our Founding Editor-in-Chief, Dr. F. Douglas Scutchfield

With the passing of our founding Editor-in-Chief, Dr. F. Douglas Scutchfield, the Journal of Appalachian Health team reflects on a life well lived and a monumental public legacy left behind. We thank Scutch for enriching the lives of so many, and we commit to growing the Journal in his honor

Shear wave generation using a spiral electromagnetic acoustic transducer

A spiral electromagnetic acoustic transducer (EMAT) is efficient in eddy current generation and has been used for surface defect inspection using Rayleigh waves or thickness gauging based on plane waves in echo mode. Measured and calculated particle velocities and directivities are presented. It is found that the shear wave is not predominantly a plane wave. It has zero amplitude on the axis of the generation EMAT and has maximum amplitude at the critical angle. The shear wave could be used in the steel industry for both internal and surface defect inspections together with Rayleigh wave

Finding qualitative research: an evaluation of search strategies

BACKGROUND: Qualitative research makes an important contribution to our understanding of health and healthcare. However, qualitative evidence can be difficult to search for and identify, and the effectiveness of different types of search strategies is unknown. METHODS: Three search strategies for qualitative research in the example area of support for breast-feeding were evaluated using six electronic bibliographic databases. The strategies were based on using thesaurus terms, free-text terms and broad-based terms. These strategies were combined with recognised search terms for support for breast-feeding previously used in a Cochrane review. For each strategy, we evaluated the recall (potentially relevant records found) and precision (actually relevant records found). RESULTS: A total yield of 7420 potentially relevant records was retrieved by the three strategies combined. Of these, 262 were judged relevant. Using one strategy alone would miss relevant records. The broad-based strategy had the highest recall and the thesaurus strategy the highest precision. Precision was generally poor: 96% of records initially identified as potentially relevant were deemed irrelevant. Searching for qualitative research involves trade-offs between recall and precision. CONCLUSIONS: These findings confirm that strategies that attempt to maximise the number of potentially relevant records found are likely to result in a large number of false positives. The findings also suggest that a range of search terms is required to optimise searching for qualitative evidence. This underlines the problems of current methods for indexing qualitative research in bibliographic databases and indicates where improvements need to be made

Temperature contour maps at the strain-induced martensitic transition of a Cu–Zn–Al shape-memory single crystal

We study temperature changes at the reverse strain-induced martensitic transformation in a Cu–Zn–Al single crystal. Infrared thermal imaging reveals a markedly inhomogeneous temperature distribution. The evolution of the contour temperature maps enables information to be extracted on the kinetics of the interface motion