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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.
911

The Effects of Indiscriminable Contingencies on the Accuracy and Completion of Homework in Middle School Students with Learning Disabilities

Boggs, Melissa 07 October 2014 (has links)
No description available.
912

The Impact of Education and Experience on Diagnostic Accuracy

Gross, Susan I. 02 September 2015 (has links)
No description available.
913

Nutrient-Specific System v. Full Fact Panel: Understanding Nutritional Judgment Using Lens Model Analysis

Carter, Kristina A. 13 June 2017 (has links)
No description available.
914

Automatic Liver and Tumor Segmentation from CT Scan Images using Gabor Feature and Machine Learning Algorithms

Shrestha, Ujjwal 19 December 2018 (has links)
No description available.
915

Efficacy of Cool-Down Exercises In the Practice Regimen of Elite Singers

Gottliebson, Renee O. 20 September 2011 (has links)
No description available.
916

How Does Intergroup Contact Predict Stereotypes in a Complex Social Reality?A Cross-Cultural Study of Intergroup Contact, Stereotypes, and Group Status

Pertiwi, Yopina Galih January 2016 (has links)
No description available.
917

The Effects of Rater Characteristics on Validity Coefficients

Van Bremen, Kathleen Michele 08 September 2016 (has links)
No description available.
918

An Empirical Study of Using Internet-Based Desktop Videoconferencing in an EFL Setting

Xiao, Mingli January 2007 (has links)
No description available.
919

Laser-induced fluorescence spectroscopy of the alkoxy radicals

Liu, Jinjun 26 February 2007 (has links)
No description available.
920

Geometrical accuracy of metallic objects produced with Additive or Subtractive Manufacturing: a comparative in-vitro study

Jönsson, David, Kevci, Mir January 2017 (has links)
Syftet: Utvärdera produktionstolerans av objekt som producerats genom additiv framställningsteknik (AF) för användning inom tandvård, samt att jämföra denna teknik med subtraktiv framställningsteknik (SF) genom reverse engineering.Material och metod: Tio exemplar av två olika geometriska objekt framställdes från fem olika AF maskiner och en SF maskin. Objekt A efterliknar ett inlay, medan objekt B återspeglar en modell av en fyrledsbro. Alla objekt delades in i olika mätled; X, Y och Z. Mätningarna utfördes med validerade och kalibrerade instrument. Linjära avstånd mättes med ett digitalt skjutmått och hörnradie samt vinklar mättes med ett digitalt mikroskop.Resultat: Vare sig additiv eller subtraktiv framställning uppvisade en perfekt matchning till CAD-filen med hänsyn till de parametrar som utvärderades i denna studie. Standardavvikelsen gällande linjära mätningar för subtraktiv framställning uppvisade konsekventa resultat i alla led, med undantag för X- och Y-led för objektet A och i Y-led för objekt B. Samtliga additiva tillverkningsgrupper hade en konsekvent standardavvikelse i X- och Y-led, men inte i Z-led. Med avseende på hörnradiemätningar, hade SF gruppen i överlag bättre produktionsnoggrannhet för både objekt A och B medan AM grupperna var mindre noggranna.Konklusion: Med hänsyn till begränsningarna med denna in vitro studie, stödjer resultat hypotesen, med hänsyn till att AF hade en bättre förmåga att återskapa komplexa och små geometrier jämfört med SF. Samtidigt identifierades en bättre reproducerbarhet hos SF gällande enkla geometrier och linjära avstånd. Vidare studier krävs för att bekräfta dessa resultat. / Purpose: To evaluate the production tolerance of objects produced by additive manufacturing systems (AM) for usage in dentistry and to compare with subtractive manufacturing system (SM) through reverse engineering. Materials and methods: Ten specimens of two geometrical objects were produced by five different AM machines and one SM machine. Object A mimics an inlay-shaped object, meanwhile object B reflects a four-unit bridge model. All the objects were divided into different measuring-axis; X, Y and Z. Measurements were performed with validated and calibrated equipment. Linear distances were measured with a digital calliper while corner radius and angle were measured with a digital microscope. Results: None of the additive manufacturing or subtractive manufacturing groups presented a perfect match to the CAD-file regarding all parameters included in present study. Considering linear measurements, the standard deviation for subtractive manufacturing group were consistent in all axis, except for X- and Y-axis in object A and Y-axis for object B. Meanwhile additive manufacturing groups had a consistent standard deviation in X- and Y- axis but not in Z-axis. Regarding corner radius measurements, SM group overall had the best accuracy for both object A and B comparing to AM groups. Conclusion: Within the limitations of this in vitro study, results support the hypothesis, considering AM had preferable capability to re-create complex and small geometry compare to SM. Meanwhile, SM were superior producing simple geometry and linear distances. Further studies are required to confirm these results.

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