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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Seismic performance of precast concrete cladding systems.

Baird, Andrew January 2014 (has links)
Structural engineering is facing an extraordinarily challenging era. These challenges are driven by the increasing expectations of modern society to provide low-cost, architecturally appealing structures which can withstand large earthquakes. However, being able to avoid collapse in a large earthquake is no longer enough. A building must now be able to withstand a major seismic event with negligible damage so that it is immediately occupiable following such an event. As recent earthquakes have shown, the economic consequences of not achieving this level of performance are not acceptable. Technological solutions for low-damage structural systems are emerging. However, the goal of developing a low-damage building requires improving the performance of both the structural skeleton and the non-structural components. These non-structural components include items such as the claddings, partitions, ceilings and contents. Previous research has shown that damage to such items contributes a disproportionate amount to the overall economic losses in an earthquake. One such non-structural element that has a history of poor performance is the external cladding system, and this forms the focus of this research. Cladding systems are invariably complicated and provide a number of architectural functions. Therefore, it is important than when seeking to improve their seismic performance that these functions are not neglected. The seismic vulnerability of cladding systems are determined in this research through a desktop background study, literature review, and postearthquake reconnaissance survey of their performance in the 2010 – 2011 Canterbury earthquake sequence. This study identified that precast concrete claddings present a significant life-safety risk to pedestrians, and that the effect they have upon the primary structure is not well understood. The main objective of this research is consequently to better understand the performance of precast concrete cladding systems in earthquakes. This is achieved through an experimental campaign and numerical modelling of a range of precast concrete cladding systems. The experimental campaign consists of uni-directional, quasi static cyclic earthquake simulation on a test frame which represents a single-storey, single-bay portion of a reinforced concrete building. The test frame is clad with various precast concrete cladding panel configurations. A major focus is placed upon the influence the connection between the cladding panel and structural frame has upon seismic performance. A combination of experimental component testing, finite element modelling and analytical derivation is used to develop cladding models of the cladding systems investigated. The cyclic responses of the models are compared with the experimental data to evaluate their accuracy and validity. The comparison shows that the cladding models developed provide an excellent representation of real-world cladding behaviour. The cladding models are subsequently applied to a ten-storey case-study building. The expected seismic performance is examined with and without the cladding taken into consideration. The numerical analyses of the case-study building include modal analyses, nonlinear adaptive pushover analyses, and non-linear dynamic seismic response (time history) analyses to different levels of seismic hazard. The clad frame models are compared to the bare frame model to investigate the effect the cladding has upon the structural behaviour. Both the structural performance and cladding performance are also assessed using qualitative damage states. The results show a poor performance of precast concrete cladding systems is expected when traditional connection typologies are used. This result confirms the misalignment of structural and cladding damage observed in recent earthquake events. Consequently, this research explores the potential of an innovative cladding connection. The outcomes from this research shows that the innovative cladding connection proposed here is able to achieve low-damage performance whilst also being cost comparable to a traditional cladding connection. It is also theoretically possible that the connection can provide a positive value to the seismic performance of the structure by adding addition strength, stiffness and damping. Finally, the losses associated with both the traditional and innovative cladding systems are compared in terms of tangible outcomes, namely: repair costs, repair time and casualties. The results confirm that the use of innovative cladding technology can substantially reduce the overall losses that result from cladding damage.
2

Using Transaction-Level Data in Online Assessment

Nyland, Robert Scott 01 June 2016 (has links)
This article format dissertation explores the benefits of using detailed forms of assessment to enable feedback in educational contexts, and includes three separate, yet related articles. In the first article, I reviewed the current state of educational research in using online learning tools that collect detailed data regarding student learning. The article examined the type of data being collected, the way that these data are processed, and how the results are presented to instructors and students as feedback. In the second article, I describe a special case of these detailed forms of assessment in an Introduction to Microsoft Excel class, and look at the potential benefits of using transaction-level data to give feedback to instructors and students. This article provides empirical evidence for the difference between transaction-level data and final answer data in identifying student knowledge gaps and misconceptions. In the final article, I analyzed knowledge gaps and misconceptions identified in the Introduction to Microsoft Excel class by using additional student activity data (video watching and reading) to predict these knowledge gaps. This article serves as a case study for using data from integrated learning environments to provide feedback regarding student performance.
3

Examining the Impact of Hostile and Communion Films on Self-Reported Experiences and the Rorschach’s Interpersonally Related Thematic Codes and Critical Content Codes

Hsiao, Wei-Cheng January 2015 (has links)
No description available.
4

Development and validation of a performance-based assessment in work and family life personal development

Warner, Victoria Jay January 2003 (has links)
No description available.
5

The Characteristics of Accurate Assessors on the Resident Educator Summative Assessment (RESA) Required for Advancing Licensure in Ohio

Simmerer, Julia L. 03 June 2021 (has links)
No description available.
6

Linguistic Issues in Culturally Sensitive Assessment: A Rorschach Case Study

Weisberg, Lauren Margaret 17 December 2019 (has links)
No description available.
7

An Analysis of the Factor Structure and Measurement Invariance of the Performance Assessment and Evaluation System Ratings of Preservice Teachers

Steadman, Anna Kay 14 April 2023 (has links)
The Performance Assessment and Evaluation System (PAES) is used by all major universities in the state of Utah to measure the effective teaching skills of preservice candidates as they progress through their teaching preparation program. The resulting ratings are used to make high-stakes decisions relating to course completion as well as recommendation for licensure. This study analyzes the factor structure and tests for measurement invariance of PAES ratings assigned to 663 elementary education candidates at Brigham Young University across two measurement occasions. The candidates were rated by 30 clinical faculty associates. This study also examines the degree to which differential rater effects impact the PAES ratings of these candidates. A bifactor model, with a general factor measuring effective teaching skills measured through observation, and a specific factor measuring effective teaching skills evaluated through conversation best fit the model. Evidence of measurement invariance was found between evaluations completed for Practicum 1 and Practicum 2 candidates. This study also found that differential rater effects impact the PAES ratings of individual candidates, indicating that a candidate's rating may depend on which rater completed the evaluation. Similar research studies should be conducted to analyze the quality of PAES ratings of teacher candidates in the various secondary education programs at BYU. In addition, since the PAES is used at other teacher preparation colleges and universities in Utah, similar research studies should be conducted to examine the quality of PAES ratings of teacher candidates at these other institutions.
8

A Comparison of Methods of Rating Creative Writing: A Many-Facets Rasch and User Experience Analysis

McIntire, Alicia 14 December 2022 (has links) (PDF)
The use of analytic rubrics remains popular in the field of writing assessment. Previous work in second-language writing assessment and other fields like economics suggest that ratings produced using this method may have lower reliability on average than other methods. Currently, there is little research on the reliability of ratings of creative writing, specifically creative writing authored by adults. This study evaluated the reliability of ratings from an analytic rubric against those produced by a comparative method called Randomly Distributed Comparative Judgment and the rater experience of the methods. The author administered a science fiction and fantasy contest in which 9 raters rated subsets of 47 total contest entries. Raters used both methods on two occasions for a total of four ratings per assigned artifact. The analytic rubric ratings were analyzed using the Many-Facets Rasch Model to model story, rater, occasion, and interaction effects. The comparisons from the RDCJ method were used in a proprietary version of the Bradley-Terry Model to calculate true scores and rater effects. Analysis showed rater effects in the ratings of both methods, though greater for those associated with the rubric model. The ratings from the rubric also contained occasion effects, but the RDCJ ratings did not. Interviews with the raters found that raters generally favored the RDCJ method, though some would have preferred a modified version. However, they all found the rubric less useful, even though many thought that it covered the generally accepted factors of good creative writing. These findings may influence practitioners' decisions when choosing a rating method for shorter works of creative writing, particularly in contexts like story contests or university admissions. However, rating of creative writing is an understudied field compared to academic writing, and more work is needed in the areas of reliability and rating.
9

Evaluation Of Shear Wall Indexes For Reinforced Concrete Buildings

Soydas, Ozan 01 February 2009 (has links) (PDF)
An analytical study was carried out to evaluate shear wall indexes for low to mid-rise reinforced concrete structures. The aim of this study was to evaluate the effect of different shear wall ratios on performance of buildings to be utilized in the preliminary assessment and design stages of reinforced concrete buildings with shear walls. In order to achieve this aim, forty five 3D building models with two, five and eight storeys having different wall ratios were generated. Linearly elastic and nonlinear static pushover analyses of the models were performed by SAP2000. Variation of roof drift and interstorey drift with shear wall ratio was obtained and results were compared with the results of approximate procedures in the literature. Additionally, performance evaluation of building models was carried out according to the linearly elastic method of Turkish Earthquake Code 2007 with Probina Orion. According to the results of the analysis, it was concluded that drift is generally not the primary concern for low to mid-rise buildings with shear walls. A direct relationship could not be established between wall index and code performance criteria. However, approximate limits for wall indexes that can be used in the preliminary design and assessment stages of buildings were proposed for different performance levels.
10

Actions Speak Louder Than Resumes: How Performance-Based Interviews Facilitate Hiring the Best Library Candidates

Tolley, Rebecca, Doucette, Wendy 01 January 2020 (has links)
This case study describes an academic library search committee's decision-making, practice, and assessment of using performance-based interviews as part of a national search for lecturer-level positions with a primary focus of reference and research services and minimal expectations of teaching information literacy in the classroom. The search committee determined performance-based interviews were successful in establishing candidates’ depth of skill in simulated reference transactions. The authors recommend incorporating an element of unscripted job simulation to employment interviews in libraries of all types.

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