A robust lesion boundary segmentation algorithm using level set methods

This paper addresses the issue of accurate lesion segmentation in retinal imagery, using level set methods and a novel stopping mechanism - an elementary features scheme. Specifically, the curve propagation is guided by a gradient map built using a combination of histogram equalization and robust statistics. The stopping mechanism uses elementary features gathered as the curve deforms over time, and then using a lesionness measure, defined herein, ’looks back in time’ to find the point at which the curve best fits the real object. We compare the proposed method against five other segmentation algorithms performed on 50 randomly selected images of exudates with a database of clinician demarcated boundaries as ground truth

Using shape entropy as a feature to lesion boundary segmentation with level sets

Accurate lesion segmentation in retinal imagery is an area of vast research. Of the many segmentation methods available very few are insensitive to topological changes on noisy surfaces. This paper presents an extension to earlier work on a novel stopping mechanism for level sets. The elementary features scheme (ELS) in [5] is extended to include shape entropy as a feature used to ’look back in time’ and find the point at which the curve best fits the real object. We compare the proposed extension against the original algorithm for timing and accuracy using 50 randomly selected images of exudates with a database of clinician demarcated boundaries as ground truth. While this work is presented applied to medical imagery, it can be used for any application involving the segmentation of bright or dark blobs on noisy images

Lesion boundary segmentation using level set methods

This paper addresses the issue of accurate lesion segmentation in retinal imagery, using level set methods and a novel stopping mechanism - an elementary features scheme. Specifically, the curve propagation is guided by a gradient map built using a combination of histogram equalization and robust statistics. The stopping mechanism uses elementary features gathered as the curve deforms over time, and then using a lesionness measure, defined herein, ’looks back in time’ to find the point at which the curve best fits the real object. We implement the level set using a fast upwind scheme and compare the proposed method against five other segmentation algorithms performed on 50 randomly selected images of exudates with a database of clinician marked-up boundaries as ground truth

06-06 “European Chemical Policy and the United States: The Impacts of REACH”

The European Union is moving toward adoption of its new Registration, Evaluation and Authorization of Chemicals (REACH) policy, an innovative system of chemicals regulation that will provide crucial information on the safety profile of chemicals used in industry. Chemicals produced elsewhere, such as in the United States, and exported to Europe will have to meet the same standards as chemicals produced within the European Union. What is at stake for the U.S. is substantial: we estimate that chemical exports to Europe that are subject to REACH amount to about $14 billion per year, and are directly and indirectly responsible for 54,000 jobs. Revenues and employment of this magnitude dwarf the costs of compliance with REACH, which will amount to no more than$14 million per year. Even if, as the U.S. chemicals industry has argued, REACH is a needless mistake, it will be far more profitable to pay the modest compliance costs than to lose access to the enormous European market.

Mary Elizabeth to Jim, 15 February 1962

Personal correspondenc

Mary Elizabeth Massey Papers - Accession 20

The Mary Elizabeth Massey Papers consist of Dr. Massey’s professional and organizational files and includes biographical data, correspondence, lecture and teaching materials, rough notes and unpublished drafts of Dr. Massey’s journal articles and books, speeches, research notes and photocopies and typescript copies of historical manuscripts from other repositories. Most of the material pertains to Dr. Massey’s publishing efforts, her work as a Winthrop faculty member and scholar and her involvement with professional organizations, especially the Southern Historical Association and the Civil War Centennial Commission. While there is material extending from Dr. Massey’s student days at Hendrix College (a 1937 graduate), most of the substantive material extends from 1953-1973.https://digitalcommons.winthrop.edu/manuscriptcollection_findingaids/1042/thumbnail.jp

Hannah Elizabeth Massey in a Senior Voice Recital

This is the program for the senior voice recital of Hannah Elizabeth Massey, accompanied by pianist, Bill Borland. The recital was held on March 18, 1968, in Mitchell Hall

Evolution of a Cross-year Mentoring Scheme

In a university department where less than seven percent of the students and staff are women, a sense of isolation can have a detrimental effect on the progression and retention of those female students. To address issues of isolation, progression, and retention the University of Lincoln's Department of Computing and Informatics (DCI)1 began a cross-year mentoring scheme in 2005 and has tracked the progress and the changes that this scheme has brought about over the past two years. Key issues addressed include better support for women students to ensure they successfully complete their studies and progress to successful careers in Computing; raising awareness of the predominantly male staff in the department regarding the impacts on female student retention; raising awareness university-wide about the support provided to female students and transferring the knowledge gained across the university to other departments. The cross-year mentoring scheme for DCI women students has resulted in a dramatic increase in female student retention. A 2004 census of students showed that only 25% of female students progressed into their 3rd academic year. However, in 2006 100% of female students advanced into their 3rd year class. The mentoring scheme initially focused on students from the year above mentoring students in the year below, and now continues by promoting postgraduate students as mentors

Soundings

"[These] poems often consider characters who are coming to terms with a difficult or painful past." -- Cf. leaf iii