5,978 research outputs found
Reliability of RHS X-connections in Branch Axial Compression
No full textRevisions were recently proposed, by Wei and Packer (2021), to how RHS sidewall instability is handled in AISC 360. This topic is updated with very recent research, and proposed revisions. An expanded database containing both experimental and numerical tests of RHS-to-RHS chord sidewall failure tests is amassed. An analysis of this data reinforces the recommendations by Wei and Packer (2021).
A review is given of methods for determining the structural reliability of steel members and connections. A reliability study is performed on the Wei and Packer (2021) recommendations, using various closed-form reliability methods and Monte Carlo simulation, to determine resistance factors for use with the recommended nominal-strength design equations. The influence of live-to-dead load ratio, as well as material and geometric properties, on the structural reliability of full-width RHS-to-RHS X-connections under branch axial compression is studied.
Test specimens are designed for an investigation of RHS-to-RHS X-connections under branch axial tension.M.A.S
Dr. Jeffrey Hass – Faculty Author Interview
No full textDr. Jeffrey Hass, Associate Professor of Sociology, discusses his new book, Power, Culture, and Economic Change in Russia: To the Undiscovered Country of Post-Socialism, 1988-2008. Utilizing cutting-edge theory and unique data, this book examines the role of power, culture, and practice in Russia’s story of post-socialist economic change, and provides a framework for addressing general economic change
EVALUATING THE FEASIBILITY OF THE PACKER MANAGING FATIGUE PROGRAM IN PARKINSON’S DISEASE: A MIXED METHOD PILOT RANDOMIZED CONTROLLED TRIAL
No full textManagement of fatigue has been identified as an unmet need in Parkinson’s disease (PD) care. To address this gap, this study evaluated the feasibility of conducting a future full-scale randomized controlled trial (RCT) of the individual version of the Packer Managing Fatigue program delivered via videoconference.
The study had two primary objectives: 1) to explore the perspectives of PwPD on the feasibility of the Packer Managing Fatigue program; and 2) to evaluate the feasibility of the proposed research protocol and outcome measures for future RCTs. This pilot, mixed-method RCT employed an assessor-blinded, two-arm design. Participants were recruited from Nova Scotia and Ontario and had to meet specific inclusion criteria: self-reported PD diagnosis, severe fatigue, English proficiency, and internet access. A total of 25 participants completed baseline measures. Standardized outcome measures and non-standardized feasibility questionnaires were used to collect quantitative data. Participants in the intervention group, were also invited to take part in a qualitative interview or focus group. Triangulation was carried out during the interpretation phase. Five themes emerged: (1) program is helpful, (2) strengths of the program, (3) areas for improvement, (4) individual online delivery feasible and (5) more support from OT would be helpful. Quantitative findings confirmed feasibility with high ratings on questionnaires and confidence in using learned strategies. Quantitative findings confirmed the feasibility of the program as well. The mixed-design ANOVA demonstrated trends toward significant improvement in occupational satisfaction and small-moderate effect sizes for occupational performance, occupational balance, and reduced motivation and physical aspects of fatigue.
In conclusion, this feasibility study demonstrated the potential application of the Packer Managing Fatigue Program among PWPD. The findings support the need for future full-scale RCTs to rigorously evaluate the effectiveness of the program. Additionally, this study provided valuable insights into patient perspectives and the feasibility of outcome measures for use in future RCTs. This research makes a significant contribution to the development of fatigue interventions for PD fatigue and informs future investigations
Providence College Faculty Author Series 2018-2019: Jeffrey Johnson
No full textIn this installment of the Faculty Authors Series, Jeffrey Johnson (History, Providence College) discusses his newest book, The 1916 Preparedness Day Bombing: Anarchy and Terrorism in Progressive Era America
Providence College Faculty Author Series 2018-2019: Jeffrey Johnson
No full textIn this installment of the Faculty Authors Series, Jeffrey Johnson (History, Providence College) discusses his newest book, The 1916 Preparedness Day Bombing: Anarchy and Terrorism in Progressive Era America
Mechanical properties of partially damaged structural steel induced by high strain rate loading at elevated temperatures - An experimental investigation
No full textAbstract not availableMahsa Mirmomeni, Amin Heidarpour, Xiao-Ling Zhao, Christopher R. Hutchinson, Jeffrey A. Packer, Chengqing W
Elliptical Hollow Section T and X Connections
No full textElliptical hollow sections (EHS) are the newest steel shape to emerge in the industry, but appropriate design guidance is lacking, being completely absent from Canadian codes and guidelines. Geometric property and compressive resistance tables were established to be potentially added to the Canadian guides. The equivalent RHS method, originally proposed by Zhao and Packer in 2009, was simplified and modified to validate its use for the design of EHS columns and beams. An experimental programme was developed to investigate the behaviour of EHS-to-EHS welded connections. Twelve T and X connection tests were performed to study the effect of connection angle, orientation type and loading. Two methods were developed to predict connection capacities and failure modes: the equivalent CHS and the equivalent RHS approaches. Both methods proved to be conservative on average, but the equivalent RHS approach proved to be more successful at capturing the actual failure mode of EHS-to-EHS connections.MAS
Elliptical Hollow Section T and X Connections
No full textElliptical hollow sections (EHS) are the newest steel shape to emerge in the industry, but appropriate design guidance is lacking, being completely absent from Canadian codes and guidelines. Geometric property and compressive resistance tables were established to be potentially added to the Canadian guides. The equivalent RHS method, originally proposed by Zhao and Packer in 2009, was simplified and modified to validate its use for the design of EHS columns and beams. An experimental programme was developed to investigate the behaviour of EHS-to-EHS welded connections. Twelve T and X connection tests were performed to study the effect of connection angle, orientation type and loading. Two methods were developed to predict connection capacities and failure modes: the equivalent CHS and the equivalent RHS approaches. Both methods proved to be conservative on average, but the equivalent RHS approach proved to be more successful at capturing the actual failure mode of EHS-to-EHS connections.MAS
Books piece on a reading by Jeffrey Lent, author of Lost Nation, that will b
No full textBooks piece on a reading by Jeffrey Lent, author of Lost Nation, that will be presented at the Portland Public Library July 31
University of Texas at Arlington (U. T. A.) President Spaniolo with author Jeffrey Toobin
No full textUniversity of Texas at Arlington (U. T. A.) President Spaniolo with author Jeffrey Toobin, legal analyst for The New Yorker, 03/2010https://mavmatrix.uta.edu/specialcollections_spaniolomaterials/1038/thumbnail.jp
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