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22 results on '"Walton, Alexandra"'

8. Predicting breast cancer-specific survival in metaplastic breast cancer patients using machine learning algorithms.

Author

Yufan Feng, McGuire, Natasha, Walton, Alexandra, Consortium, AP-MBC, Fox, Stephen, Papa, Antonella, Lakhani, Sunil R., and McCart Reed, Amy E.

Subjects
RANDOM forest algorithms, BREAST cancer, CANCER patients, MACHINE learning, DECISION trees, FORECASTING
Abstract

Metaplastic breast cancer (MpBC) is a rare and aggressive subtype of breast cancer, with data emerging on prognostic factors and survival prediction. This study aimed to develop machine learning models to predict breast cancer-specific survival (BCSS) in MpBC patients, utilizing a dataset of 160 patients with clinical, pathological, and biological variables. An in-depth variable selection process was carried out using gain ratio and correlation-based methods, resulting in 10 variables for model estimation. Five models (decision tree with bagging; logistic regression; multilayer perceptron; naïve Bayes; and, random forest algorithms) were evaluated using 10-fold cross-validation. Despite the constraints posed by the absence of therapeutic information, the random forest model exhibited the highest performance in predicting BCSS, with an ROC area of 0.808. This study emphasizes the potential of machine learning algorithms in predicting prognosis for complex and heterogeneous cancer subtypes using clinical datasets, and their potential to contribute to patient management. Further research that incorporates additional variables, such as treatment response, and more advanced machine learning techniques will likely enhance the predictive power of MpBC prognostic models. [ABSTRACT FROM AUTHOR]

Published
2023
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18. Art and Learning at the Imperial War Museum (IWM), London.

Author

Walton, Alexandra F.

Subjects
ART education, MILITARY museums
Abstract

This article argues that visual art has an integral role to play in the educational mission of war museums that goes beyond merely illustrating historical narratives. The significant fine art collection of the IWM (Imperial War Museums), which contains over 20,000 items, is explored with a specific focus on how art curators from IWM London engage with these works to inform the Museum’s narratives. More than any other part of the IWM collection, art has the ability to address abstract concepts and analytical themes related to the history of war. The article draws on interviews with IWM art curators, and examines the often contested role that the art collection plays in the broader efforts of a museum currently celebrating its centenary year. [ABSTRACT FROM AUTHOR]

Published
2017

20. Reconciling Tradition and Innovation: An Analysis of Indigenous Iron and Lead Use, Modification, and Remanufacture at the Onöndowa'ga:' (Seneca Iroquois) White Springs Archaeological Site, Circa 1688–1715

Author

Walton, Alexandra Diane

Subjects
Colonialism, Cultural Entanglement, Haudenosaunee, Iroquois, Object Modification, Tradition
Abstract

This thesis analyzes 366 iron and lead artifacts from the Onöndowa'ga:' (Seneca Iroquois) White Springs archaeological site (c. 1688–1715) in conjunction with Hodinöhsö:ni' (Haudenosaunee/Iroquois) burial data and the ethnohistoric record. Artifacts were identified by consulting reference materials, visually comparing fragmentary artifacts to complete objects at the Rochester Museum and Science Center (RMSC), and taking digital radiographs of highly corroded objects. Thirty-one of these European trade items were modified into more “traditional” forms. This represents a unique opportunity to reconcile the seemingly contradictory concepts of tradition and innovation by applying a practice-based approach to the White Springs assemblage. White Springs artifacts are compared to iron and lead assemblages from earlier Hodinöhsö:ni' sites and to the subsequent Onöndowa'ga:' Townley-Read site (c. 1715–1754) in order to examine iron and lead use, modification, and remanufacture through time. The White Springs and Townley-Read assemblages contain higher quantities of nails and hardware, while assemblages from earlier sites are comprised of more tools, implements, and modified iron. Nail, iron, and lead densities were calculated for each spatial area of the White Springs site to identify the activities performed across different spaces. An examination of the iron and lead White Springs objects additionally provided evidence of Onöndowa'ga:' construction methods, warfare tactics, hunting practices, and lead smithing techniques. Ultimately, this thesis attempts to answer several related research questions, such as, why did the Onöndowa'ga:' modify iron and lead obtained from colonial traders? How were iron and lead objects repaired and remanufactured? How were iron and lead used? Did the use of iron and lead change warfare tactics and hunting practices? How were nails used in construction? Were European or Indigenous blacksmiths present at White Springs?

Published
2021

21. Howard Arkley and Juan Davila Interior with built in bar.

Author

Walton, Alexandra

Abstract

The article features the screenprint "Interior With Built in Bar 1992," which is a collaborative work by Australian artists Juan Davila and Howard Arkley. The artwork is part of the collections of Melbourne, Victoria-based screenprinter Larry Rawling that were acquired by the National Gallery of Australia. The screenprint was featured at an exhibition at the Kalli Rolfe Contemporary Galleries in 2001.

Published
2008

22. Franck Gohier archive.

Author

Walton, Alexandra

Abstract

This article examines an archive of Australian prints and drawings that has been acquired by the National Gallery of Australia in 2007. The archive represents 12 years of collaborative printmaking from Northern Territory University and Red Hand Prints. Franck Gohier worked as senior printmaker at both institutions, helping in the realisation of the plates and printing editions between the years 1992-2004. The archive comprises the work of indigenous artists, including Bede Tungutalum, Rover Thomas and Queenie McKenzie.

Published
2007

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