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Dissertations / Theses on the topic 'Comparison assessment models'

Author: Grafiati

Published: 4 June 2021

Last updated: 19 February 2022

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1

Patil, Sumeet Rajshekhar. "Identification, Application, and Comparison of Sensitivity Analysis Methods for Food Safety Risk Assessment Models." NCSU, 2001. http://www.lib.ncsu.edu/theses/available/etd-20011206-174616.

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<p>Identification and qualitative comparison of sensitivity analysis methods that have been used across various disciplines, and that merit consideration for application to food safety risk assessment models are presented in this paper. Sensitivity analysis can help in identifying critical control points, prioritizing additional data collection or research, and verifying and validating a model. Ten sensitivity analysis methods, including four mathematical methods, five statistical methods and one graphical method, are identified. Application of these methods was also illustrated with the examp

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2

Plevrakis, Viktor. "Comparison of risk assessment methods for polluted soils in Sweden, Norway and Denmark." Thesis, Stockholms universitet, Institutionen för naturgeografi och kvartärgeologi (INK), 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-109376.

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Land contamination is an acknowledged problem around the world due to its potentially adverse impacts on human health and the environment. Specifically in Europe there are estimated to be 2,500,000 potentially contaminated sites. The risk that contaminated sites pose is investigated by risk assessments. The methods and the models though used in risk assessments, vary both on a national and an international level. In this study, the risk assessment methods and models for polluted soils used in Scandinavia and issued by the Environmental Protection Agencies were compared. The comparison aimed to

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Nemeth, Lyle John. "A Comparison of Risk Assessment Models for Pipe Replacement and Rehabilitation in a Water Distribution System." DigitalCommons@CalPoly, 2016. https://digitalcommons.calpoly.edu/theses/1599.

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A water distribution system is composed of thousands of pipes of varying materials, sizes, and ages. These pipes experience physical, environmental, and operational factors that cause deterioration and ultimately lead to their failure. Pipe deterioration results in increased break rates, decreased hydraulic capacity, and adverse effects on water quality. Pipe failures result in economic losses to the governing municipality due to loss of service, cost of pipe repair/replacement, damage incurred due to flooding, and disruptions to normal business operations. Inspecting the entire water distribu

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4

Westerberg, Erik. "AI-based Age Estimation using X-ray Hand Images : A comparison of Object Detection and Deep Learning models." Thesis, Blekinge Tekniska Högskola, Fakulteten för datavetenskaper, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-19598.

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Bone age assessment can be useful in a variety of ways. It can help pediatricians predict growth, puberty entrance, identify diseases, and assess if a person lacking proper identification is a minor or not. It is a time-consuming process that is also prone to intra-observer variation, which can cause problems in many ways. This thesis attempts to improve and speed up bone age assessments by using different object detection methods to detect and segment bones anatomically important for the assessment and using these segmented bones to train deep learning models to predict bone age. A dataset co

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Corti, Rachele. "Benchmarking the ability of different stock-assessment models to capture the highly-fluctuating dynamics of small pelagics." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2017.

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Small pelagics dynamics are characterised by extreme variability owing to environmental factors, fishing and natural mortality. Because of highly-fluctuating dynamics, it is difficult to evaluate the stock status through models. To assess these evaluation difficulties, a model comparison framework based on the Management Strategy Evaluation (MSE) approach has been developed and tested in the Gulf of Cadiz anchovy stock. We have used a minimum realistic model (MRM) as operating model, including well documented environmental drivers for this stock to simulate abundance indexes and catches, and

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Mhlongo, Nanikie Charity, and n/a. "Competency-Based assessment in Australia - does it work?" University of Canberra. Education and Community Studies, 2002. http://erl.canberra.edu.au./public/adt-AUC20050530.094237.

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South Africa since the liberation in 1994 has faced a lot of changes. The changes include being a member of the international community. As part of the international community, South Africa is finding itself largely faced by the challenges associated with this position. Looking at other countries South Africa is realizing that the world is looking at better ways of educating their people and organizing their education and training systems so that they might gain the edge in an increasingly competitive economic global environment. Success and survival in such a world demands that South Africa h

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7

Chee, Yenlai. "Remote sensing analysis of cratered surfaces Mars landing hazard assessment, comparison to terrestrial crater analogs, and Mars crater dating models /." To access this resource online via ProQuest Dissertations and Theses @ UTEP, 2007. http://0-proquest.umi.com.lib.utep.edu/login?COPT=REJTPTU0YmImSU5UPTAmVkVSPTI=&clientId=2515.

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8

Negretto, Giacomo. "The impact of spatial representation on flood hazard assessment: a comparison between 1D, quasi-2D and fully 2D hydrodynamic models of Rio Marano (Rimini)." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2019. http://amslaurea.unibo.it/17600/.

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Four hydrodynamic numerical models were constructed and compared for a case study along the Marano stream (Rimini) using the software HEC-RAS . The models include a 1D model, with extended cross-sections to represent the floodplain flow; a 1D model, with floodplain represented as hydrostatic Storage Areas; a coupled 1D/2D model, with a 1D representation of the main channel and a 2D representation of the floodplain inundation, and a fully 2D model, with both main channel and floodplains represented through a two-dimensional hydrodynamic numerical scheme. First, 1D steady flow simulations were p

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9

Shen, Hui. "Model comparison and assessment by cross validation." Thesis, University of British Columbia, 2008. http://hdl.handle.net/2429/1286.

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Cross validation (CV) is widely used for model assessment and comparison. In this thesis, we first review and compare three v-fold CV strategies: best single CV, repeated and averaged CV and double CV. The mean squared errors of the CV strategies in estimating the best predictive performance are illustrated by using simulated and real data examples. The results show that repeated and averaged CV is a good strategy and outperforms the other two CV strategies for finite samples in terms of the mean squared error in estimating prediction accuracy and the probability of choosing an optimal model.

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Peterson, Viktor, and Zihao Wang. "Cross-comparison of Non-Linear Seismic Assessment Methods for Unreinforced Masonry Structures in Groningen." Thesis, KTH, Betongbyggnad, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-289386.

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A large amount of low-rise unreinforced masonry structures (URM) can be foundin Groningen, the Netherlands. More and more induced earthquakes with shortduration have been detected in this region due to gas exploitation. Local unreinforcedmasonry (URM) buildings were initially not designed for withstanding seismicactions, so that unexpected damage may occur due to their vulnerability, raising insecurityamong residents. Existing low-rise masonry buildings in Groningen can bedivided into different categories based on their characteristics. Two types of residentialmasonry buildings that fulfil the

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Rajele, Molefi Joseph. "A comparison of SAAS and chemical monitoring of the rivers of the Lesotho Highlands Water Project." Thesis, University of the Western Cape, 2004. http://etd.uwc.ac.za/index.php?module=etd&amp.

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The Lesotho Highlands Development Authority routinely uses the South African Scoring System version 4 (SASS4) in conjunction with water chemistry to monitor water quality of rivers in the Lesotho Highlands Water Project areas. The objective of this study was to test the efficiency of SASS4 in these areas.

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Fitzgibbon, Daniel Nathan, and n/a. "Assessment and comparison of osseointegration in conventionally and immediately restored titanium implants in a sheep model." University of Otago. School of Dentistry, 2008. http://adt.otago.ac.nz./public/adt-NZDU20081201.161832.

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Objectives: The present work was under taken to compare osseointegration of immediately and delayed restored implants in a sheep model, and to compare methods of assessing osseointegration. Methods: Twenty wide-platform implants were placed in the posterior mandibles of 10 sheep, 3 months after premolar extractions. Ten were control implants placed and restored after 3 months of submerged healing. Ten were test implants placed contralaterally and immediately restored. Animals were sacrificed after a further 3 months of healing. At each experimental stage implant stability was measured with r

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Gomez, Vera Gabriela. "Languages as factors of reading achievement in PIRLS assessments." Phd thesis, Université de Bourgogne, 2011. http://tel.archives-ouvertes.fr/tel-00563710.

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The starting point of this research is the question, may reading acquisition be more or less effective depending on the language in which it is perform? Two categories for classifying the languages have been developed. First the notion of linguistic family is employed to describe the languages from a cultural and historical perspective. Secondly, the notion of orthographic depth is used for differentiating the languages according to the correspondence between orthography and phonetic. These categories have been related to the databases PIRLS 2001 and 2006 (international assessments about readi

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Sims, Maureen Estelle. "Rubric Rating with MFRM vs. Randomly Distributed Comparative Judgment: A Comparison of Two Approaches to Second-Language Writing Assessment." BYU ScholarsArchive, 2018. https://scholarsarchive.byu.edu/etd/7312.

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The purpose of this study is to explore a potentially more practical approach to direct writing assessment using computer algorithms. Traditional rubric rating (RR) is a common yet highly resource-intensive evaluation practice when performed reliably. This study compared the traditional rubric model of ESL writing assessment and many-facet Rasch modeling (MFRM) to comparative judgment (CJ), the new approach, which shows promising results in terms of reliability and validity. We employed two groups of raters<&hyphen>”novice and experienced<&hyphen>”and used essays that had been previously doubl

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Gómez, Vera Gabriela. "Languages as factors of reading achievement in PIRLS assessments." Thesis, Dijon, 2011. http://www.theses.fr/2011DIJOL013/document.

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Le point de départ de cette recherche concerne la question suivante : l’acquisition de la lecture, peut-il être plus ou moins efficace en fonction de la langue dans laquelle il s’effectue? Deux catégories pour classer les langues on été définies dans ce travail. Premièrement, la notion de famille linguistique est à la base d’une description des langues à partir d'une perspective historique et culturelle. Deuxièmement la notion de profondeur orthographique est mobilisée, celle-ci différencie les langues en fonction de la correspondance entre l'orthographe et la phonétique. Ces catégories ont ét

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Blum-Evitts, Shemariah. "Designing a foodshed assessment model guidance for local and regional planners in understanding local farm capacity in comparison to local food needs /." Amherst, Mass. : University of Massachusetts Amherst, 2009. http://scholarworks.umass.edu/theses/288/.

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17

Martinez, Nicole. "Selected techniques in radioecology| Model development and comparison for internal dosimetry of rainbow trout (Oncorhynchus mykiss) and feasibiltiy assessment of reflectance spectroscopy use as a tool in phytoremediation." Thesis, Colorado State University, 2014. http://pqdtopen.proquest.com/#viewpdf?dispub=3624304.

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<p>Over the past five to ten years, public interest in nuclear energy, decommissioning, and waste management and stewardship has increased, leading to a renewed interest in radioecology (Kuhne 2012), or the study of the relationships between ionizing radiation and the environment (Whicker and Shultz 1982a). Several groups supporting collaborative radioecological research have recently been established, including the European Radioecology ALLIANCE in 2009 (Hinton et al. 2013), the Strategy for Allied Radioecology (STAR) network in 2011 (Kuhne 2012), and the National Center for Radioecology (N

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18

Beauchet, Sandra. "Evaluation multicritère d'itinéraires techniques viticoles associant l'évaluation environnementale par Analyse du Cycle de Vie avec l'évaluation de la qualité du raisin. : Contribution au choix des pratiques pour une amélioration des itinéraires techniques viticoles." Electronic Thesis or Diss., Angers, 2016. http://www.theses.fr/2016ANGE0078.

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La production du raisin à l’origine de vins AOC (Appellation d’Origine Contrôlée) est soumise à des cahiers de charges imposant des exigences en termes de rendement, de qualité des produits et de pratiques. En plus de ces exigences, le viticulteur doit désormais faire évoluer ses itinéraires techniques viticoles pour en améliorer les performances environnementales. Or, définir des lignes directrices d’action pour une amélioration des pratiques viticoles en s'appuyant sur les évaluations environnementales et de qualité du raisin est complexe tant ces évaluations fournissent un nombre important

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19

"A Comparison of Fuzzy Models in Similarity Assessment of Misregistered Area Class Maps." Master's thesis, 2010. http://hdl.handle.net/2286/R.I.8672.

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abstract: Spatial uncertainty refers to unknown error and vagueness in geographic data. It is relevant to land change and urban growth modelers, soil and biome scientists, geological surveyors and others, who must assess thematic maps for similarity, or categorical agreement. In this paper I build upon prior map comparison research, testing the effectiveness of similarity measures on misregistered data. Though several methods compare uncertain thematic maps, few methods have been tested on misregistration. My objective is to test five map comparison methods for sensitivity to misregistration,

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20

Gripp, Natalie Mary. "A comparison of three brief analysis models with the inclusion of contingency reversals." Thesis, 2011. http://hdl.handle.net/2152/ETD-UT-2011-12-4851.

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Functional Analysis is a widely used and effective tool for the assessment of challenging behavior. However, there are several practical issues associated with analogue functional analysis, including the reinforcement of challenging behavior and the extended duration of the assessment process. These issues have been addressed in several modified functional analysis models, including the brief functional analysis. The brief functional analysis allows practitioners and researchers to complete an assessment of challenging behavior within a 90-minute period, thus addressing the practical issue

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21

Feryandi, Faus Tinus Handi. "Landslide susceptibility assessment in Karanganyar regency - Indonesia - Comparison of knowledge-based and Data-driven Models." Master's thesis, 2011. http://hdl.handle.net/10362/8277.

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Dissertation submitted in partial fulfillment of the requirements for the Degree of Master of Science in Geospatial Technologies.<br>Disaster management requires spatial information as a backbone of preparedness and mitigation process. In that context, an assessment of landslide susceptibility becomes essential in an area that is prone to landslide due to its geographical condition. The Tawangmangu, Jenawi and Ngargoyoso Subdistric in Karanganyar Regency is the one of such areas, and is the area most frequently hit by landslides in the Central Java Province of Indonesia. In this study, t

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Svensson, Josefin. "Dispersion of Drilling Discharges : A comparison of two dispersion models and consequences for the risk picture of cold water corals." Thesis, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-210077.

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One of the ocean’s greatest resources is the coral reefs, providing unique habitats for alarge variety of organisms. During drilling operations offshore many activities maypotentially harm these sensitive habitats. Det Norske Veritas (DNV) has developed arisk-based approach for planning of drilling operations called Coral Risk Assessment (CRA) to reduce the risk of negative effects upon cold water corals (Lophelia pertusa) on the Norwegian Continental Shelf (NCS). In order to get a good risk assessment amodelled dispersion plume of the drilling discharges is recommended. This study concerned a

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Brock, Terry A. "A comparison of deterministic and probabilistic radiation dose assessments at three fictitious ��Cs contaminated sites in California, Colorado, and Florida." Thesis, 1997. http://hdl.handle.net/1957/34111.

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"Visual Analytics Tool for the Global Change Assessment Model." Master's thesis, 2015. http://hdl.handle.net/2286/R.I.35998.

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abstract: The Global Change Assessment Model (GCAM) is an integrated assessment tool for exploring consequences and responses to global change. However, the current iteration of GCAM relies on NetCDF file outputs which need to be exported for visualization and analysis purposes. Such a requirement limits the uptake of this modeling platform for analysts that may wish to explore future scenarios. This work has focused on a web-based geovisual analytics interface for GCAM. Challenges of this work include enabling both domain expert and model experts to be able to functionally explore the model.

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Mokilane, Paul Moloantoa. "The application and empirical comparison of item parameters of Classical Test Theory and Partial Credit Model of Rasch in performance assessments." Diss., 2014. http://hdl.handle.net/10500/18362.

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This study empirically compares the Classical Test Theory (CTT) and the Partial Credit Model (PCM) of Rasch focusing on the invariance of item parameters. The invariance concept which is the consequence of the principle of specific objectivity was tested in both CTT and PCM using the results of learners who wrote the National Senior Certificate (NSC) Mathematics examinations in 2010. The difficulty levels of the test items were estimated from the independent samples of learn- ers. The same sample of learners used in the calibration of the difficulty levels of the test items in the PCM mo

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Ally, Idrees Abdul Latif. "Comparison of hr-pQCT & MRTA to DXA & QUS for the Ex-vivo Assessment of Bone Strength." Thesis, 2010. http://hdl.handle.net/1807/24527.

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There is a pressing need for better assessment of bone strength as current clinical tools do not directly measure bone mechanical properties, but offer only surrogate measures of bone strength. We conducted an ex-vivo study of emu bones to examine how two investigative devices, hr-pQCT and MRTA, compare to current clinical tools (DXA and QUS) in predicting true bone mechanical properties. We found that hr-pQCT parameters were able to assess bone strength as well as DXA and better than QUS, while MRTA was able to predict bone strength well in low-density but not high-density bones. Our resul

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"A Comparison of DIMTEST and Generalized Dimensionality Discrepancy Approaches to Assessing Dimensionality in Item Response Theory." Master's thesis, 2013. http://hdl.handle.net/2286/R.I.18167.

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abstract: Dimensionality assessment is an important component of evaluating item response data. Existing approaches to evaluating common assumptions of unidimensionality, such as DIMTEST (Nandakumar & Stout, 1993; Stout, 1987; Stout, Froelich, & Gao, 2001), have been shown to work well under large-scale assessment conditions (e.g., large sample sizes and item pools; see e.g., Froelich & Habing, 2007). It remains to be seen how such procedures perform in the context of small-scale assessments characterized by relatively small sample sizes and/or short tests. The fact that some procedures come w

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Lin, Wei Chiu, and 林維秋. "An Assessment of Intention Models in the Overseas Traveling Domain for the Senior Group–also with Comparisons with Other Age Groups." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/02171853469165734623.

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碩士<br>南開科技大學<br>福祉科技與服務管理所<br>98<br>The purpose of this study is to explore how the overseas traveling intention model differs among young adults of 25-49 years old, the pre-senior of 50-64 and the senior of 65 years old (including and above). According to the related literature, three models including Theory of Reasoned Action (TRA), Theory of Planed Behavior (TPB), Theory of Self-Regulation (TSR) were adopted to test their abilities of serviceability and prediction of overseas traveling intention. In the period between October 20th and Nov 30th 2009, 2400 questionnaires were distributed upo

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Blum-evitts, Shemariah. "Designing a Foodshed Assessment Model: Guidance for Local and Regional Planners in Understanding Local Farm Capacity in Comparison to Local Food Needs." 2009. https://scholarworks.umass.edu/theses/288.

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This thesis explores how to conduct a regional foodshed assessment and further provides guidance to local and regional planners on the use of foodshed assessments. A foodshed is the geographic origin of a food supply. Before the 1800s, foodsheds were predominantly local — within the city or neighboring countryside. Today most urban areas are supported by a global foodshed. While the global foodshed can present many benefits, it also creates tremendous externalities. In an attempt to address these concerns, promotion of alternative local foodsheds has re-emerged. A foodshed assessment serves as

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