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You searched for subject:(population attrition). Showing records 1 – 3 of 3 total matches.

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Delft University of Technology

1. De Ruiter, C. (author). Dynamic modeling and validation of an industrial adipic acid plant.

Degree: 2009, Delft University of Technology

An industrial crystallization process is a complex process consisting of a lot of physical phenomena. Temperature, stirrer speed and other process inputs determine the rate of physical phenomena like agglomeration and growth. This study aims to develop a dynamic model structure that describes the physical phenomena in the crystallization process. The population balance equation is the basis of the model structure. Simple kinetic relations and the concentration balance are coupled to the population balance. The high resolution finite volume scheme is applied as the numerical solution method to solve the population balance equation. The dynamic model is validated with experimental results from an adipic acid crystallizer. Gathering the experimental results is a large part of this study. The process inputs of the crystallizer are changed to see the effect on the crystal size distribution (CSD). A change in the temperature seems to have the largest influence on the CSD. But the recirculation rate is the most effective process input to vary. The experimental results were used to validate the model structure. The model results shows that the model can simulate the measured mean crystal size accurately. Improvements on the kinetic relations have to be made to also simulate the complete CSD.

PEQ

Process and Energy

Mechanical, Maritime and Materials Engineering

Advisors/Committee Members: Kramer, H.J.M. (mentor).

Subjects/Keywords: Population Balance Equition; Crystallization; Dynamic Modeling; high resolution shemes; attrition; agglomeratio; adipic acid

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APA (6th Edition):

De Ruiter, C. (. (2009). Dynamic modeling and validation of an industrial adipic acid plant. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:0fa28bb7-647b-4c6c-bfeb-01c5857cf969

Chicago Manual of Style (16th Edition):

De Ruiter, C (author). “Dynamic modeling and validation of an industrial adipic acid plant.” 2009. Masters Thesis, Delft University of Technology. Accessed March 03, 2021. http://resolver.tudelft.nl/uuid:0fa28bb7-647b-4c6c-bfeb-01c5857cf969.

MLA Handbook (7th Edition):

De Ruiter, C (author). “Dynamic modeling and validation of an industrial adipic acid plant.” 2009. Web. 03 Mar 2021.

Vancouver:

De Ruiter C(. Dynamic modeling and validation of an industrial adipic acid plant. [Internet] [Masters thesis]. Delft University of Technology; 2009. [cited 2021 Mar 03]. Available from: http://resolver.tudelft.nl/uuid:0fa28bb7-647b-4c6c-bfeb-01c5857cf969.

Council of Science Editors:

De Ruiter C(. Dynamic modeling and validation of an industrial adipic acid plant. [Masters Thesis]. Delft University of Technology; 2009. Available from: http://resolver.tudelft.nl/uuid:0fa28bb7-647b-4c6c-bfeb-01c5857cf969


East Carolina University

2. Rogerson, C. Lisa. The Impact of Populating the Freshman Seminar on Retention, Student Perception of Content, Student Satisfaction and Connection to the Institution.

Degree: EdD, Educational Leadership, 2008, East Carolina University

The purpose of this study was to examine the relationship between how the freshman seminar course in extended orientation format is populated at a large research institution and its impact on student perception of content, student satisfaction with the course as a vehicle for successful transition to the institution and building relationships with peers and faculty, as well as, student retention. Race and gender were considered as well. The study, involving survey research, addressed five research questions and fifteen null hypotheses. Analysis of the dependent and independent variables in this study allowed for the retention of twelve and rejection of three of the hypotheses. Findings indicate that populating the freshman seminar intentionally by major and/or advisor allows for greater opportunities for students to make connections with peers and faculty members. This, in turn, can perpetuate higher retention of these students. Population method of the freshman seminar does not appear to have a significant impact on student perception of content, student satisfaction with the course or opportunities for building connections with the university. Race and gender appear to have no significant impact on the outcomes of the study. Seven implications for practitioners and four recommendations for further research were suggested. Both implications and recommendations focused on how the freshman seminar, currently a viable retention tool, might be enhanced to yield greater student benefits resulting in increased retention. Advisors/Committee Members: Poock, Michael (advisor).

Subjects/Keywords: Education, Higher; Education; Administration; Universities; Retention; Population method; Freshman seminar; First year initiatives; Attrition; College student orientation – North Carolina – Pitt County; College freshmen – North Carolina – Pitt County – Attitudes; Dropouts – North Carolina – Pitt County – Prevention; East Carolina University – Students

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APA (6th Edition):

Rogerson, C. L. (2008). The Impact of Populating the Freshman Seminar on Retention, Student Perception of Content, Student Satisfaction and Connection to the Institution. (Doctoral Dissertation). East Carolina University. Retrieved from http://hdl.handle.net/10342/1079

Chicago Manual of Style (16th Edition):

Rogerson, C Lisa. “The Impact of Populating the Freshman Seminar on Retention, Student Perception of Content, Student Satisfaction and Connection to the Institution.” 2008. Doctoral Dissertation, East Carolina University. Accessed March 03, 2021. http://hdl.handle.net/10342/1079.

MLA Handbook (7th Edition):

Rogerson, C Lisa. “The Impact of Populating the Freshman Seminar on Retention, Student Perception of Content, Student Satisfaction and Connection to the Institution.” 2008. Web. 03 Mar 2021.

Vancouver:

Rogerson CL. The Impact of Populating the Freshman Seminar on Retention, Student Perception of Content, Student Satisfaction and Connection to the Institution. [Internet] [Doctoral dissertation]. East Carolina University; 2008. [cited 2021 Mar 03]. Available from: http://hdl.handle.net/10342/1079.

Council of Science Editors:

Rogerson CL. The Impact of Populating the Freshman Seminar on Retention, Student Perception of Content, Student Satisfaction and Connection to the Institution. [Doctoral Dissertation]. East Carolina University; 2008. Available from: http://hdl.handle.net/10342/1079


University of New Mexico

3. Medina, Una E. MADD MESSAGE EFFECTS: A TWELVE-YEAR RANDOMIZED TRIAL.

Degree: Department of Communication and Journalism, 2010, University of New Mexico

One out of three Americans undergoes drunk-driving crashes; 23% result in death. To deter DWIs (Driving While under Influence), MADD (Mothers Against Drunk Drivers) created VIPs (Victim Impact Panels) where victims impact offenders with gory stories, photos, and threats of punishments and loss of freedom, hoping this message will deter DWIs. It is remarkable that although the VIP message is considered a primary DWI intervention, yet no studies have investigated VIP message effects. VIP message effects, their persistence and decay, are chronicled here over the course of 12 years. This study extends an empirical investigation of VIPs, conducted by Woodall, Delaney, Rogers, and Wheeler (2007) (n = 833) during 1994-1996. At 2 years, these researchers found MADD VIP participants' recidivism rates were 30% higher than their DWI School comparison group, trending toward significance at p = .0583. This study supports those results as significant at 12 years. As an extension, it investigates whether reactance theory explains VIP message effects failure. Reactance theory research, a subset of message effects research, explains how emotional, confrontational, and threatening messages induce psychological reactance in the mind of the message receiver, who then seeks to preserve his or her sense of freedom by behaving contrarily (Brehm, 1966). Hierarchically intensifying effects of these theoretical reactance antecedents are studied here in an unusual manner, as they occur in vivo, in real life. The same intervention was observed to have different effects depending on prior conditions and demographics. The emotional high-threat, high-confrontation MADD VIP message coincided with significantly shorter time to recidivism (p = .009, d = 1.64) and significantly higher number of subsequent arrests (p < .0001, d = 1.64) among recent prior offenders, and those with no priors under age 30 (p = .01, d = 0.35). Younger offenders may be associated with more iconoclastic behavior than older offenders (Beirness & Simpson, 1997; Greenberg, 2005; NHTSA, 2008), partially explaining the under-30 age effect. This study furthers persuasive message design as a science and suggests a message-based approach to intervention analysis. There was no effect when MADD VIP was analyzed simply as an intervention. However, there were highly significant effect sizes when the same MADD VIP intervention was analyzed as a message. This study concludes by offering MADD VIP best practice recommendations. Advisors/Committee Members: Woodall, W. Gill, Schuetz, Janice, Rivera, Mario A., McDermott, Virginia, Delaney, Harold.

Subjects/Keywords: Victim Impact panels; MADD; message effects; randomized trial; effect size; drunk driving; DWI; efficacy trial; method problems; methodological problems; communication theory; theory building; rhetorical analysis; triangulation; drunk driving; interventions; covariates; ANOVA; ANCOVA; survival analysis; message context; message content; message function; message intensity; message frequency; message metrics; message pathos; pathos; message decay; decay rate; message decay rate; intent to persuade; persuasion; confrontation; shame; shaming; public shaming; public censure; forewarning; perceived threat; reactance theory; assumptions; sampling error; recruitment error; non-adherence to condition; random assignment error; factorial design; operationalization; theory construct operationalization; methods informed by literature; methodological symbiosis; questionnaire reliability and validity; secondary data sources; public arrest record; public data; covariate operationalization; reactance constructs; content analysis; theme analysis; prior arrest; censored cases; QSR N6; SPSS; Excel; limitations; under-identification; attrition; population attrition; bimodal distribution; dichotomous variables; data splitting; discretizing data; time to recidivism; subsequent arrests; emotional change; emotion score; outliers; reactance antecedent; message dose; message dosage; treatment fidelity; assess treatment fidelity; predictor variables; controlling variables; demographic covariate; demographic predictor; confirmation bias; data bias; interaction effect; treatment effect; message design; fear appeal; message strength; anger; survival analysis; time dependence; mixed methods; study design; message standardization; internal validity; hard data; hard end-point data; marginal sample size; observed variables; intervening factors; intervening variables; sample size; in vivo; hierarchy of effects; emotional threat; older offenders; young offenders; intervention analysis; message-based approach; best practices; DWI intervention; DWI treatment; prior conditions; iconoclast; Drunks Against MADD Mothers; resistance; message design science

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Medina, U. E. (2010). MADD MESSAGE EFFECTS: A TWELVE-YEAR RANDOMIZED TRIAL. (Doctoral Dissertation). University of New Mexico. Retrieved from http://hdl.handle.net/1928/12395

Chicago Manual of Style (16th Edition):

Medina, Una E. “MADD MESSAGE EFFECTS: A TWELVE-YEAR RANDOMIZED TRIAL.” 2010. Doctoral Dissertation, University of New Mexico. Accessed March 03, 2021. http://hdl.handle.net/1928/12395.

MLA Handbook (7th Edition):

Medina, Una E. “MADD MESSAGE EFFECTS: A TWELVE-YEAR RANDOMIZED TRIAL.” 2010. Web. 03 Mar 2021.

Vancouver:

Medina UE. MADD MESSAGE EFFECTS: A TWELVE-YEAR RANDOMIZED TRIAL. [Internet] [Doctoral dissertation]. University of New Mexico; 2010. [cited 2021 Mar 03]. Available from: http://hdl.handle.net/1928/12395.

Council of Science Editors:

Medina UE. MADD MESSAGE EFFECTS: A TWELVE-YEAR RANDOMIZED TRIAL. [Doctoral Dissertation]. University of New Mexico; 2010. Available from: http://hdl.handle.net/1928/12395

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