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- Title
- IDENTIFICATION OF FACTORS INFLUENCING THE COMMISSION OF BURGLARIES.
- Creator
-
Donmez, MUSTAFA, Wan, Thomas, University of Central Florida
- Abstract / Description
-
As in many countries, burglary is very important crime in Turkey. Scientific methods and techniques are needed to solve complex burglary cases. This study was completed in the Bursa Police context since they classified many crime data conducive to scientific studies under a project called BEMTAP. The main purpose of this study is to examine the factors influencing the commission of burglaries, using an epid-criminological perspective. While measuring the relative importance of predictor...
Show moreAs in many countries, burglary is very important crime in Turkey. Scientific methods and techniques are needed to solve complex burglary cases. This study was completed in the Bursa Police context since they classified many crime data conducive to scientific studies under a project called BEMTAP. The main purpose of this study is to examine the factors influencing the commission of burglaries, using an epid-criminological perspective. While measuring the relative importance of predictor variables on the number of burglaries and on repeated burglaries, two different models were constructed and validated. For the first model of predictors, Hierarchical Multiple Regression Analysis were performed; for the second one, logistic regression was used. The results show that offender factors are more influential than opportunity and environmental factors in explaining the variability in frequency of burglaries committed and the likelihood to commit repeated burglaries. In conclusion, the best way to reduce burglary rate is to focus on offender factors. Dealing with oppportunity and environmental factors would also contribute to a decreased burglary rate.
Show less - Date Issued
- 2011
- Identifier
- CFE0003926, ucf:48706
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0003926
- Title
- ACCIDENTAL INVERSION DURING 3D ROTATION WITH 2-DOF INPUT DEVICES.
- Creator
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Diaz, Derek, Sims, Valerie, University of Central Florida
- Abstract / Description
-
This dissertation focuses on a human operator's ability to perform rotational control of a three-dimensional object using two-degrees of freedom (DOF) interface devices. Although input devices designed specifically for 3D interaction exist, devices traditionally used for two-dimensional user interaction, such as a mouse or joystick, have become ubiquitous to computer tasks. This research examines a particular human-computer interaction issue that arises from stimulus-response...
Show moreThis dissertation focuses on a human operator's ability to perform rotational control of a three-dimensional object using two-degrees of freedom (DOF) interface devices. Although input devices designed specifically for 3D interaction exist, devices traditionally used for two-dimensional user interaction, such as a mouse or joystick, have become ubiquitous to computer tasks. This research examines a particular human-computer interaction issue that arises from stimulus-response compatibility between three-dimensional stimuli spaces and 2-DOF response sets. The focal point of this research is a phenomenon referred to here as accidental inversion. Accidental inversions occur when an operator erroneously moves a three-dimensional object in a direction opposite than was intended. Thus, the effect of accidental inversion results from a mismatch between the operator's intended and actual input. A key assumption in diagnosing the causal factors involved in the accidental inversion effect is contribution from both internal (i.e., having to do with the individual) and external (i.e., having to do with the environment) influences. Three experiments were conducted to study accidental inversion. The first examined population stereotype, a measure of a target population's natural response tendencies to particular stimuli for a particular task. Results indicated a strong population stereotype for horizontal rotations (i.e., yaw) and weak stereotype for vertical rotations (i.e., pitch). This effect was mediated by whether the task was in the context of flight or ground-based movement. The second experiment analyzed the subjective preference for two opposite input-response (I-R) mappings (i.e., how the system responds to different input into the controlling device) for a task requiring control over vertical rotation. Results indicated that subjective preferences for I-R mappings were not heavily polarized. The third experiment also focused on vertical rotational control and examined how subjective preference for a particular I-R mapping affected performance. Furthermore, this experiment also examined performance when interference was introduced in the form of a temporary interruption where the participant had to conduct the task using an opposite I-R mapping. Results indicated that, upon being interrupted with the opposite I-R mapping, the group who used the mapping they subjectively preferred did worse than the group who used the mapping they did not prefer. This research has implications for the design of human-machine systems requiring human-in-the-loop three-dimensional rotational control. Some human-machine systems can have significant consequences from even a single mistake caused by a human-operator accidentally providing the wrong input. Findings from this research lead to two primary recommendations to the design of human-machine systems: a) an easily accessible and clearly indicated method to select input-response mapping which is provided before beginning the actual task, b) be informed of the current input-response mapping in use.
Show less - Date Issued
- 2007
- Identifier
- CFE0001961, ucf:47454
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0001961
- Title
- AN EXPLORATORY FACTOR ANALYSIS OF SELF-REPORTED STATE AND TRAIT GUILT.
- Creator
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Lacerenza, Christina, Cassisi, Jeffrey, University of Central Florida
- Abstract / Description
-
The construct of guilt has been a subject of debate among philosophers, theologians, sociologists and psychologists for centuries. Disagreements concerning guilt have emerged on the definitional level, measurement level, and conceptual level due to the various ways guilt can be experienced and interpreted. Researchers continue to empirically investigate various aspects of guilt in an effort to advance and refine our understanding of the construct; however, differences among researchers in...
Show moreThe construct of guilt has been a subject of debate among philosophers, theologians, sociologists and psychologists for centuries. Disagreements concerning guilt have emerged on the definitional level, measurement level, and conceptual level due to the various ways guilt can be experienced and interpreted. Researchers continue to empirically investigate various aspects of guilt in an effort to advance and refine our understanding of the construct; however, differences among researchers in assessing the impact of guilt on psychological well-being still exist. The purpose of this study is to investigate the internal factor structure of three prominent measures of guilt. This will enable us to develop a more concise guilt measure en route to reconciling these differences and better conceptualizing the construct.
Show less - Date Issued
- 2012
- Identifier
- CFH0004163, ucf:44815
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFH0004163
- Title
- ORIENTING OF VISUAL-SPATIAL ATTENTION WITH AUGMENTED REALITY: EFFECTS OF SPATIAL AND NON-SPATIAL MULTI-MODAL CUES.
- Creator
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Jerome, Christian, Mouloua, Mustapha, University of Central Florida
- Abstract / Description
-
Advances in simulation technology have brought about many improvements to the way we train tasks, as well as how we perform tasks in the operational field. Augmented reality (AR) is an example of how to enhance the user's experience in the real world with computer generated information and graphics. Visual search tasks are known to be capacity demanding and therefore may be improved by training in an AR environment. During the experimental task, participants searched for enemies (while...
Show moreAdvances in simulation technology have brought about many improvements to the way we train tasks, as well as how we perform tasks in the operational field. Augmented reality (AR) is an example of how to enhance the user's experience in the real world with computer generated information and graphics. Visual search tasks are known to be capacity demanding and therefore may be improved by training in an AR environment. During the experimental task, participants searched for enemies (while cued from visual, auditory, tactile, combinations of two, or all three modality cues) and tried to shoot them while avoiding shooting the civilians (fratricide) for two 2-minute low-workload scenarios, and two 2-minute high-workload scenarios. The results showed significant benefits of attentional cuing on visual search task performance as revealed by benefits in reaction time and accuracy from the presence of the haptic cues and auditory cues when displayed alone and the combination of the visual and haptic cues together. Fratricide occurrence was shown to be amplified by the presence of the audio cues. The two levels of workload produced differences within individual's task performance for accuracy and reaction time. Accuracy and reaction time were significantly better with the medium cues than all the others and the control condition during low workload and marginally better during high workload. Cue specificity resulted in a non-linear function in terms of performance in the low workload condition. These results are in support of Posner's (1978) theory that, in general, cueing can benefit locating targets in the environment by aligning the attentional system with the visual input pathways. The cue modality does not have to match the target modality. This research is relevant to potential applications of AR technology. Furthermore, the results identify and describe perceptual and/or cognitive issues with the use of displaying computer generated augmented objects and information overlaid upon the real world. The results also serve as a basis for providing a variety of training and design recommendations to direct attention during military operations. Such recommendations include cueing the Soldier to the location of hazards, and mitigating the effects of stress and workload.
Show less - Date Issued
- 2006
- Identifier
- CFE0001481, ucf:47092
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0001481
- Title
- EMOTIONAL EVALUATION OF A PRODUCT/SYSTEM.
- Creator
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Smith, Hana, Sims, Valerie, University of Central Florida
- Abstract / Description
-
Technological advances in products and systems have brought emotional design or emotional engineering to the forefront of research. While several measures to assess emotional expression of products have been developed, the source of the emotion rating of a product or system was often unclear. The purpose of this dissertation is to conduct three studies to examine the causes of emotional ratings and to establish if product-specific emotion rating scales are useful for capturing accurate user...
Show moreTechnological advances in products and systems have brought emotional design or emotional engineering to the forefront of research. While several measures to assess emotional expression of products have been developed, the source of the emotion rating of a product or system was often unclear. The purpose of this dissertation is to conduct three studies to examine the causes of emotional ratings and to establish if product-specific emotion rating scales are useful for capturing accurate user evaluations. Three studies were conducted using citrus juicers. Juicers were chosen for several reasons: their wide variety of styles, one self-explanatory purpose (to make juice), and the fact that their benign nature is unlikely to harm participants. Study 1 isolated juicers that had unique emotion profiles to use in the Study 2. Participants rated 41 juicers with fourteen product-specific emotions. Participants predominantly used "five" of the fourteen emotions in their juicer ratings. Ten juicers with the highest rating consensus, within these five emotions, were chosen for Study 2. Study 2 determined that anthropomorphic tendencies are predictive of emotional ratings. Extreme Anthropomorphism from the Anthropomorphic Tendency Scale (ATS) was used to test individual differences (Sims et al. 2005;Chin et al., 2005). Individuals with low anthropomorphic tendencies were more critical of the products. Sex differences also were analyzed, and significant interactions were found. Women exhibited different preferences for juicers than me. First impression ratings from Study 1 were validated by first impression ratings from Study 2. Finally, Study 3 measured the impact of product interaction on emotional ratings. Participants used seven juicers to make a minimum of four ounces of juice. Pre and post-interaction ratings were compared to determine the effect of interaction on the emotional appraisal of products. The results confirmed that interaction had an impact on affective ratings. As opposed to experienced users, novice users deviated in their pre-post appraisal, especially on aesthetically boring but highly usable products. Novice users based their entire initial appraisal on aesthetics, while experienced users were influenced by their past experience. Humans rely on past experience to recall likes or dislikes. The findings here suggest that aesthetic appraisal of products (or other environments) will remain influenced by past exposure/experience with those or similar products. Thus, only true novices can remain unbiased by past experience for aesthetic appraisal and capture a true 'first impression'. Also, past experience of users should be assessed when conducting research that relies on emotional appraisal of products. These findings may be especially useful in product development where new designs are based on a golden standard, competition, or go through several iterations of testing. The results may be used to guide human factors professionals to develop measures that more accurately capture affective ratings, and thus create more pleasurable products and systems.
Show less - Date Issued
- 2008
- Identifier
- CFE0002175, ucf:47513
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0002175
- Title
- THE EFFECTS OF A STRUCTURED LIFESTYLE INTERVENTION PROGRAM IN CONJUNCTION WITH DIETARY SUPPLEMENTATION ON WEIGHT LOSS AND RISK FACTORS FOR THE METABOLIC SYNDROME.
- Creator
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Zukley, Linda, Angelopoulos, Theodore, University of Central Florida
- Abstract / Description
-
The objective of this study was to determine the effects of a structured weight loss program that included hypocaloric diet, exercise and dietary supplementation, on weight loss, metabolic syndrome risk factors and antioxidant levels in healthy overweight and obese females. Thirty-seven healthy overweight and obese women (BMI 29.5 ± 2.3 kg/m2, 41.1 ± 7.1 yrs) participated in this study. The subjects were randomized into one of two groups: an exercise, hypocaloric diet and antioxidant...
Show moreThe objective of this study was to determine the effects of a structured weight loss program that included hypocaloric diet, exercise and dietary supplementation, on weight loss, metabolic syndrome risk factors and antioxidant levels in healthy overweight and obese females. Thirty-seven healthy overweight and obese women (BMI 29.5 ± 2.3 kg/m2, 41.1 ± 7.1 yrs) participated in this study. The subjects were randomized into one of two groups: an exercise, hypocaloric diet and antioxidant supplement (LifePak®; LSANT group, n=20) or an exercise, hypocaloric diet and appetite suppression supplement (HTP Complex® and TēGreen®; LSAS group, n=17). A significant weight loss occurred in both groups after 12 weeks (LSANT: -2.8 ± 2.8 kg and LSAS: -4.3 ± 2.7 kg, p<0.001). Body fat mass, percent body fat, and waist circumference significantly improved in both groups (p<0.05). No significant difference was found between the groups for weight loss (p>0.05). However, a significant difference was found between the groups for body fat mass (LSANT: -1.8 ± 2.6 kg; LSAS: -3.4 ± 2.4 kg, p ≤ 0.05). Glucose, insulin and insulin resistance (HOMA-IR) were significantly decreased in the LSAS group (glucose: -5.0 ± 6.8 mg/dl, p=0.008; insulin: -2.6 ± 3.8 uIU/dl, p=0.013; and HOMA-IR: -0.7 ± 1.0, p=0.012) but not in the LSANT group (p>0.05). There were no significant differences (p>0.05) observed within or between the groups for cholesterol, triglycerides or LDL-c. HDL-c decreased significantly in the LSANT group (-2.9 ± 5.3 mg/dl, p=0.024) but not in the LSAS group (p>0.05). Skin carotenoid scores (SCS) increased significantly within the LSANT group (LSANT: 10950 ± 8395 SCS, p<0.001) but not the LSAS group (p>0.05). Lifestyle intervention that involves a structured hypocaloric diet and increased physical activity results in weight loss and improvements in body composition. However, supplementation with an appetite suppressant (HTP Complex®) did not enhance weight loss beyond what was achieved with a structured lifestyle intervention. Antioxidant supplementation may be of benefit during a weight loss program that incorporates physical activity and a low energy diet.
Show less - Date Issued
- 2007
- Identifier
- CFE0001815, ucf:47348
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0001815
- Title
- IMPROVING BUSINESS PERFORMANCE THROUGH THE INTEGRATION OF HUMAN FACTORS ENGINEERING INTO ORGANIZATIONS USING A SYSTEMS ENGINEERING APPROACH.
- Creator
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Philippart, Monica, Karwowski, Waldemar, University of Central Florida
- Abstract / Description
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Most organizations today understand the valuable contribution employees as people (rather than simply bodies) provide to their overall performance. Although efforts are made to make the most of the human in organizations, there is still much room for improvement. Focus in the reduction of employee injuries such as cumulative trauma disorders rose in the 80's. Attempts at increasing performance by addressing employee satisfaction through various methods have also been ongoing for several...
Show moreMost organizations today understand the valuable contribution employees as people (rather than simply bodies) provide to their overall performance. Although efforts are made to make the most of the human in organizations, there is still much room for improvement. Focus in the reduction of employee injuries such as cumulative trauma disorders rose in the 80's. Attempts at increasing performance by addressing employee satisfaction through various methods have also been ongoing for several years now. Knowledge Management is one of the most recent attempts at controlling and making the best use of employees' knowledge. All of these efforts and more towards that same goal of making the most of people's performance at work are encompassed within the domain of the Human Factors Engineering/Ergonomics field. HFE/E provides still untapped potential for organizational performance as the human and its optimal performance are the reason for this discipline's being. Although Human Factors programs have been generated and implemented, there is still the need for a method to help organizations fully integrate this discipline into the enterprise as a whole. The purpose of this research is to develop a method to help organizations integrate HFE/E into it business processes. This research begun with a review of the ways in which the HFE/E discipline is currently used by organizations. The need and desire to integrate HFE/E into organizations was identified, and a method to accomplish this integration was conceptualized. This method consisted on the generation of two domain-specific ontologies (a Human Factors Engineering/Ergonomics ontology, and a Business ontology), and mapping the two creating a concept map that can be used to integrate HFE/E into businesses. The HFE/E ontology was built by generating two concept maps that were merged and then joined with a HFE/E discipline taxonomy. A total of four concept maps, two ontologies and a taxonomy were created, all of which are contributions to the HFE/E, and the business- and management-related fields.
Show less - Date Issued
- 2008
- Identifier
- CFE0002445, ucf:47716
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0002445
- Title
- CHANGING TRADITIONS: EXAMINING THE FACTORS THAT DETERMINE THE PROBABILITY OF BIDDING TO HOST THE OLYMPIC GAMES OVER TIME.
- Creator
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Dickens, Jessie R, Hofler, Richard, University of Central Florida
- Abstract / Description
-
In September 2017, the International Olympic Committee (IOC) announced that, for the first time in its history, it would award the hosting of two different Olympic Games at the same time, giving the 2024 and 2028 Summer Olympic Games to Paris and Los Angeles respectively. As a result, the question is raised as to why the IOC broke tradition in its host city selection process. The break of tradition is presumably due to a lack of candidates to host the 2028 Summer Olympics. With prior host...
Show moreIn September 2017, the International Olympic Committee (IOC) announced that, for the first time in its history, it would award the hosting of two different Olympic Games at the same time, giving the 2024 and 2028 Summer Olympic Games to Paris and Los Angeles respectively. As a result, the question is raised as to why the IOC broke tradition in its host city selection process. The break of tradition is presumably due to a lack of candidates to host the 2028 Summer Olympics. With prior host cities reporting astronomical costs and high debt balances associated with hosting, many cities have retracted their bids or have refused to submit candidature bids altogether. The Olympics are one of the largest, most economically impactful mega-events in modern culture. While hosting does provide a nation with the opportunity to show off its infrastructure and culture before millions of people worldwide, the costs to host the event have steadily risen as the Olympics have become a larger and larger spectacle. This study uses a logistic regression model to determine the relative factors that determine a city's willingness to bid and uses the results to draw conclusions as to why the willingness to host has fluctuated across time. The results show a definite change in the probabilities of a potential city bidding to host the Olympic Games across time and also provide insight into the factors that determine these changes in probabilities. By determining these conclusions, this study hopes to provide insight into ways that hosting the Olympics can become accessible to all prospective host cities so that there is increased competition in the host city selection process.
Show less - Date Issued
- 2018
- Identifier
- CFH2000293, ucf:45727
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFH2000293
- Title
- IDENTIFYING POPULATIONS AT RISK FOR INFECTION AFTER KNEE ARTHROPLASTY: AN INTEGRATED LITERATURE REVIEW.
- Creator
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Coker, Christian, Bushy, Angeline, University of Central Florida
- Abstract / Description
-
The purpose of this integrated review of the literature was to explore the postsurgical infection complications commonly occurring in individuals undergoing total knee replacement surgery, and the relationship of co-morbidities, lifestyle choices, and genetics on the risk for complication. A comprehensive search of the literature focusing on the patient surgical site infection and total knee replacement surgery using the Cumulative Index to Nursing and Allied Health Literature (CINAHL) and...
Show moreThe purpose of this integrated review of the literature was to explore the postsurgical infection complications commonly occurring in individuals undergoing total knee replacement surgery, and the relationship of co-morbidities, lifestyle choices, and genetics on the risk for complication. A comprehensive search of the literature focusing on the patient surgical site infection and total knee replacement surgery using the Cumulative Index to Nursing and Allied Health Literature (CINAHL) and Medical Literature On-line (MEDLINE). Initial searches revealed 80 results. Upon closer scrutiny, duplicates were removed, as well as those not relevant to infection in total knee arthroplasty. This resulted in a review of 6 articles that fit the inclusion criteria. Inclusion criteria were articles written in the English language and published in scholarly, peer-reviewed, journals from 2009 to present. In addition to published articles, pertinent material from current nursing textbooks was evaluated and chosen to further substantiate the literature results. In cases of knee arthroplasty, diagnoses of obesity and diabetes were discovered to be risk factors for postsurgical infection. The findings of this thesis offer interpretation for nursing practice, research, education, and policy. Implications for nursing research, policy, education and practice are highlighted along with limitations of this integrative review.
Show less - Date Issued
- 2014
- Identifier
- CFH0004668, ucf:45302
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFH0004668
- Title
- RISK FACTORS IN WOMEN FOR POSTPARTUM DEPRESSION VERSUS POSTPARTUM PSYCHOSIS: AN INTEGRATIVE LITERATURE REVIEW.
- Creator
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Jamieson, Briana, Bushy, Angeline, University of Central Florida
- Abstract / Description
-
The purpose of this literature review was to identify differentiating risk factors in women for postpartum depression and postpartum psychosis. By understanding differentiating risk factors health care professionals, and nurses in particular, can be alert to women who are at higher risk for postpartum depression or postpartum psychosis. This information allows for early nursing intervention and the development of appropriate treatment plans. Fifteen peer-reviewed, English language research...
Show moreThe purpose of this literature review was to identify differentiating risk factors in women for postpartum depression and postpartum psychosis. By understanding differentiating risk factors health care professionals, and nurses in particular, can be alert to women who are at higher risk for postpartum depression or postpartum psychosis. This information allows for early nursing intervention and the development of appropriate treatment plans. Fifteen peer-reviewed, English language research articles published between 2000 and 2015 were analyzed for the purpose of this literature review. Study results were inconclusive for the intention of this review, but do provide valuable information on independent risk factors for both disorders. A history of depression and significant life stressors are strong predictors for postpartum depression. Whereas a history of bipolar disorder is strongly associated with the development of postpartum psychosis. Further research is needed to examine the role of genetics in both postpartum depression and postpartum psychosis and to further evaluate risk factors for postpartum psychosis, specifically in women with no history of bipolar disorder. Moreover, additional research needs to be conducted within the United States due to a lack of generalizability of studies conducted in other nations.
Show less - Date Issued
- 2016
- Identifier
- CFH2000083, ucf:45562
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFH2000083
- Title
- THE TRANSFORMATION AND DEMISE OF TERRORIST ORGANIZATIONS: CAUSES AND CATEGORIES.
- Creator
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Mehta, Devyani M, Turcu, Anca, University of Central Florida
- Abstract / Description
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In the recent years, the world has experienced devastating losses due to terrorist attacks. Research in the fields of causes of terrorism is abundant, but the amount of research on the end of terrorism does not equally measure up. This paper aims to add to the research focused on analyzing the factors which cause terrorist groups to transition away from violence. This paper introduces an original categorization of the factors which generate this transition. Factors belong to two categories:...
Show moreIn the recent years, the world has experienced devastating losses due to terrorist attacks. Research in the fields of causes of terrorism is abundant, but the amount of research on the end of terrorism does not equally measure up. This paper aims to add to the research focused on analyzing the factors which cause terrorist groups to transition away from violence. This paper introduces an original categorization of the factors which generate this transition. Factors belong to two categories: internal --decisions made by the terrorist organization, and external--actions or features pertaining to organization outside of non-terrorist organizations. These factors will be illustrated through examples of terrorist organizations and their activity. The purpose of this paper is to provide an original, comparative overview of those factors that may best illustrate the study of counterterrorism.
Show less - Date Issued
- 2016
- Identifier
- CFH2000026, ucf:45570
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFH2000026
- Title
- THE RISK OF SECONDARY LYMPHEDEMA DUE TO PROCEDURES IN THE AFFECTED ARM POST-MASTECTOMY: A LITERATURE REVIEW.
- Creator
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Perna, Lindsay, D'Amato-Kubiet, Leslee, University of Central Florida
- Abstract / Description
-
The risk for upper extremity lymphedema post-mastectomy in women surgically treated for breast cancer is a concern since it is often painful, aesthetically displeasing, and can increase the risk of infection. However, there is a paucity of data examining if diagnostic procedures performed in the ipsilateral arm post-mastectomy increases the risk of lymphedema. The purpose of this research is to examine the relationship between diagnostic procedures performed in the ipsilateral arm post...
Show moreThe risk for upper extremity lymphedema post-mastectomy in women surgically treated for breast cancer is a concern since it is often painful, aesthetically displeasing, and can increase the risk of infection. However, there is a paucity of data examining if diagnostic procedures performed in the ipsilateral arm post-mastectomy increases the risk of lymphedema. The purpose of this research is to examine the relationship between diagnostic procedures performed in the ipsilateral arm post-mastectomy and the occurrence of lymphedema with or without related complications. A systematic review of the literature was conducted from multiple, online databases available from 1992 through 2014, and included CINAHL, MedLine, PsychInfo, and ERIC. Search terms included lymphedema, breast cancer, mastectomy, blood pressure, and infection. Exclusion criteria comprised articles focused on male gender, primary lymphedema, metastases, survival, quality of life studies, reoccurrence breast cancer, breast conservation, lymphedema management, lymphedema, and lymphoma. The results of this study were inconclusive concerning a relationship between upper extremity lymphedema and procedures performed in the ipsilateral arm after mastectomy. This literature review outlines gaps in the data showing a need for more focused research on the causes of secondary lymphedema after breast cancer surgery with lymph node removal. Further research on the impact of diagnostic and other invasive procedures on the ispilateral arm after mastectomy should be considered.
Show less - Date Issued
- 2015
- Identifier
- CFH0004857, ucf:45480
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFH0004857
- Title
- STRESS INTENSITY FACTOR DEPENDENCE OF HG-AL LIQUID METAL EMBRITTLEMENT.
- Creator
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Keller, Scott, Gordon, Ali, University of Central Florida
- Abstract / Description
-
When high strength aluminum alloys are subjected to liquid metals, physical and chemical reactions ensue resulting in what is known as liquid metal embrittlement (LME). A subset of environmentally-assisted cracking, LME is exhibited when a liquid metal, e.g. Hg or Ga, comes into intimate contact with a solid metal having significant susceptibility. As mechanical loads are applied, the interaction between the two metals results in a reduction in the flow properties of the solid metal. Several...
Show moreWhen high strength aluminum alloys are subjected to liquid metals, physical and chemical reactions ensue resulting in what is known as liquid metal embrittlement (LME). A subset of environmentally-assisted cracking, LME is exhibited when a liquid metal, e.g. Hg or Ga, comes into intimate contact with a solid metal having significant susceptibility. As mechanical loads are applied, the interaction between the two metals results in a reduction in the flow properties of the solid metal. Several theories have been proposed to identify the underlying microstructural failure mechanism; however, none have been widely accepted, as failures can typically incorporate features common to several failure theories. In an effort to confirm, extend or replace the physically-based theories, fracture mechanics experiments on Al 7075–T651 in liquid mercury have been conducted. Experiments were conducted in a custom environmental chamber capable of exposing specimens to liquid environments while applying a mechanical load. Through both plane-strain fracture and stress intensity factor-dependent (SIF) tests, fracture toughness values along with incubation periods were analyzed and provided data for a load-based theory of LME. These mechanical test data, along with metallographic analysis, show that the phenomena of LME is both strongly time- and SIF-dependent.
Show less - Date Issued
- 2009
- Identifier
- CFE0002893, ucf:48033
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0002893
- Title
- DAGS: AN INFORMATION SYSTEM DESIGN RESEARCH FRAMEWORK SUPPORTING THE DESIGN, DEVELOPMENT AND DELIVERY OF MORE EFFECTIVE INFORMATION SYSTEMS.
- Creator
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Adams, Lascelles, Cheney, Paul, University of Central Florida
- Abstract / Description
-
Many IT systems fail to realize their objectives because not enough attention has been paid to the business context in which the system functions. One reason expressed - an emphasized technical focus which tend to omit business and organizational issues germane to the organization's and the system's success. When an organization's information system is in line with, and provides support for its business strategy – strategic alignment – superior business performance is...
Show moreMany IT systems fail to realize their objectives because not enough attention has been paid to the business context in which the system functions. One reason expressed - an emphasized technical focus which tend to omit business and organizational issues germane to the organization's and the system's success. When an organization's information system is in line with, and provides support for its business strategy – strategic alignment – superior business performance is often the result. Within the Requirements Engineering (RE) community there has been several attempts to develop and utilize approaches which can illuminate business and organizational informational needs. In this dissertation, the DAGS framework is used to develop an integrated web-based requirements elicitation system which is based on Critical Success Factors (CSFs), Jackson's problem diagrams and organizational strategy analysis technique to represent and model an organization's IT requirements. This research employs the DAGS (multi-methodological approach consisting of Design Science, Action Research, Grounded Theory and System Development research methodologies) framework for Information System (IS) design to assist the Information Technology (IT) department in developing a collaborative user requirements system to assist in designing and constructing more effective information systems by incorporating the needs of various stakeholders in support of organizational goals while satisfying these varied needs. Top management's field of vision is represented in the CSFs which provide a compelling clarification of what is important to the organization. Failure to achieve a CSF directly affects the organization's ability to accomplish its mission; Research shows that alignment of IT systems with business strategy leads to superior organizational performance. Industry professionals have consistently considered alignment of IT with business strategy essential to their success thus requirements for an organization's information systems need to be aligned with the objectives of the business strategy that its stakeholders intend to support. This dissertation contributes to the literature on validating an organization's IT and Business Strategic alignment. It has also provided an example of research, grounded in theory but which is nevertheless relevant to business.
Show less - Date Issued
- 2009
- Identifier
- CFE0002966, ucf:47947
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0002966
- Title
- INFLUENCE MAP METHODOLOGY FOR EVALUATING SYSTEMIC SAFETY ISSUES.
- Creator
-
Barth, Timothy, Pet-Armacost, Julia, University of Central Florida
- Abstract / Description
-
"Raising the bar" in safety performance is a critical challenge for many organizations. Contributing factor taxonomies organize information on why accidents occur. Therefore, they are essential elements of accident investigations and safety reporting systems. Organizations must balance efforts to identify causes of specific accidents with efforts to evaluate systemic safety issues in order to become more proactive about improving safety. This research successfully addressed two problems: (1)...
Show more"Raising the bar" in safety performance is a critical challenge for many organizations. Contributing factor taxonomies organize information on why accidents occur. Therefore, they are essential elements of accident investigations and safety reporting systems. Organizations must balance efforts to identify causes of specific accidents with efforts to evaluate systemic safety issues in order to become more proactive about improving safety. This research successfully addressed two problems: (1) limited methods and metrics exist to support the design of effective taxonomies, and (2) influence relationships between contributing factors are not explicitly modeled within a taxonomy. The primary result of the taxonomic relationship modeling efforts was an innovative "dual role" contributing factor taxonomy with significant improvements in comprehensiveness and diagnosticity over existing taxonomies. The influence map methodology was the result of a unique graphical and analytical combination of the dual role taxonomy and influence relationship models. Influence maps were developed for several safety incidents at Kennedy Space Center. An independent assessment was conducted by a team of experts using the new dual role taxonomy and influence chain methodology to evaluate the accuracy and completeness of contributing factors identified during the formal incident investigations. One hundred and sixteen contributing factors were identified using the influence map methodology. Only 16% of these contributing factors were accurately identified with traditional tools, and over half of the 116 contributing factors were completely unaddressed by the findings and recommendations of the formal incident reports. The new methodology is being applied to improve spaceport operations and enhance designs of future NASA launch systems.
Show less - Date Issued
- 2006
- Identifier
- CFE0001274, ucf:46928
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0001274
- Title
- AN INVESTIGATION OF LINGUISTIC, COGNITIVE, AND AFFECTIVE FACTORS THAT IMPACT ENGLISH LANGUAGE LEARNERS' PERFORMANCE ON A STATE STANDARDIZED READING ACHIEVEMENT TEST.
- Creator
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Strebel Halpern, Carine, Nutta, Joyce, University of Central Florida
- Abstract / Description
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The explicit teaching of reading comprehension strategies has been proposed as a means to better prepare secondary school-aged students for today's information-dense, fast-paced, fast-changing global society, and to improve the academic performance of struggling adolescent readers. This proposition of a direct and positive impact of reading comprehension strategies on reading achievement for all students has not been investigated with English language learners (ELLs) who, by definition,...
Show moreThe explicit teaching of reading comprehension strategies has been proposed as a means to better prepare secondary school-aged students for today's information-dense, fast-paced, fast-changing global society, and to improve the academic performance of struggling adolescent readers. This proposition of a direct and positive impact of reading comprehension strategies on reading achievement for all students has not been investigated with English language learners (ELLs) who, by definition, do not possess the same level of English language skills as their native-English speaking peers. This mixed-method study investigated linguistic, cognitive, as well as affective factors that impact adolescent ELLs' performance on a standardized state reading achievement test. The quantitative portion examined the relative contributions of second language proficiency and reading comprehension strategies to a prediction model of reading achievement in 110 ninth and tenth grade ELLs. The qualitative portion of the study involved individual interviews and was aimed at deepening the understanding of ELLs' use of strategies during the standardized reading test, while also investigating affective factors that may impact their performance on this measure of academic achievement. Quantitative findings include two statistically significant prediction models of reading achievement with reading comprehension strategies and English language proficiency as predictor variables. However, only language proficiency made a significant unique contribution to the prediction variable. Qualitative findings suggest that the participants had relatively little metacognitive awareness of their comprehension during the standardized test, had overestimated their use of reading strategies as reported on a 30-item strategy survey instrument, had concentrated on sentence-level comprehension due to unknown vocabulary, and may have been hindered by testing anxiety in being able to wholly concentrate on the task. Recommendations made for the instruction of comprehension strategies consist of the raising of metacognitive awareness through the explicit modeling of the thought processes involved in reading comprehension, including determining the meaning of unknown words.
Show less - Date Issued
- 2009
- Identifier
- CFE0002931, ucf:47989
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0002931
- Title
- FACTORS RELATED TO STRESS IN NURSING STUDENTS.
- Creator
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Shultz, Marie, Covelli, Maureen, University of Central Florida
- Abstract / Description
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The purpose of this review of literature was to explore and critically analyze relevant literature regarding stress factors and the consequences of stress in nursing students. Findings from this review of literature aimed to provide a better understanding of stress factors and the physical and psychological impact of stress on nursing students. Information was collected from the Cumulative Index to Nursing and Allied Health Literature, PsycINFO, and MEDLINE- EBSCOhost databases to explore...
Show moreThe purpose of this review of literature was to explore and critically analyze relevant literature regarding stress factors and the consequences of stress in nursing students. Findings from this review of literature aimed to provide a better understanding of stress factors and the physical and psychological impact of stress on nursing students. Information was collected from the Cumulative Index to Nursing and Allied Health Literature, PsycINFO, and MEDLINE- EBSCOhost databases to explore what research has been conducted and to assess the current knowledge base. Analysis of the literature indicated that nursing students reported experiencing increased levels of stress during the academic year. Nursing students reported higher levels of stress in conjunction with elevated external stressors, including increased responsibilities and course requirements. Analysis of the findings suggested that factors related to stress in nursing students arose from clinical sources, academic sources, and personal sources. Further analysis indicated that experiencing elevated levels of stress had a negative impact on the student. Increased levels of stress, combined with poor coping mechanisms, may lead to poor academic performance and burn-out among nursing students. Future research may evaluate means to reduce stress levels and mitigate stress in nursing students through targeting specific causative factors. Findings from this review of literature aim to influence student management of stress.
Show less - Date Issued
- 2011
- Identifier
- CFH0003825, ucf:44778
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFH0003825
- Title
- HOW BEHAVIORAL FACTORS ARE BEING IMPLEMENTED INTO TODAY'S FINANCIAL EDUCATION PROGRAMS.
- Creator
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Perez, Esperanza, Gilkeson, Jim, University of Central Florida
- Abstract / Description
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This research examined 50 financial education programs within the state of Florida. The purpose of the research was to survey financial education program providers to see how they are evolving to meet the sociological, psychological and behavioral factors that affect individual's financial decision making. In constructing the survey I referenced articles, journals and publications regarding how certain factors can affect an individual and their ability to apply financial education to their...
Show moreThis research examined 50 financial education programs within the state of Florida. The purpose of the research was to survey financial education program providers to see how they are evolving to meet the sociological, psychological and behavioral factors that affect individual's financial decision making. In constructing the survey I referenced articles, journals and publications regarding how certain factors can affect an individual and their ability to apply financial education to their daily life. This review of previous research showed that tailored education, to determine a participant's means, ability and goals, is the best way to help participants achieve financial independence. In this literature review no specific details were found on how programs are evolving or how existing program offerings are filling the need for tailored financial education. This topic is important because financial decisions that people make will not only affect current generations but also future generations. I contacted 50 agencies with a 27 question survey regarding their basic organizational structure, funding, program details, success determinants, primary program goals and focus, and marketing strategies. 36% of those contacted, or 18 organizations, responded. All responses were compiled and compared to determine relationships among program structures, offerings, and goals. The primary findings were that most organizations opened after 2000, have budgets under $100,000 funded primarily by two main sources, and their main goals are to provide basic knowledge and education to help participants improve financial decisions. In addition, most programs conduct a pre-post survey or get participant feedback to evaluate programs and use the number of participants at meetings as their main success factor. The majority of programs do not collect financial information, however they provide one-on-one counseling to focus on tailoring education to 501+ participants per year. Recommendations for future research are to increase the number of respondents, look deeper into funding requirements, the program lifecycle, marketing strategies employed and their effectiveness, and what specific financial education topics programs are addressing. This will add to existing research by providing a broader view of the financial education landscape and help programs to evolve to meet the need for tailored education.
Show less - Date Issued
- 2015
- Identifier
- CFH0004729, ucf:45374
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFH0004729
- Title
- TRAINING WAYFINDING: NATURAL MOVEMENT IN MIXED REALITY.
- Creator
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Savage, Ruthann, Gilson, Richard, University of Central Florida
- Abstract / Description
-
The Army needs a distributed training environment that can be accessed whenever and wherever required for training and mission rehearsal. This paper describes an exploratory experiment designed to investigate the effectiveness of a prototype of such a system in training a navigation task. A wearable computer, acoustic tracking system, and see-through head mounted display (HMD) were used to wirelessly track users' head position and orientation while presenting a graphic representation of...
Show moreThe Army needs a distributed training environment that can be accessed whenever and wherever required for training and mission rehearsal. This paper describes an exploratory experiment designed to investigate the effectiveness of a prototype of such a system in training a navigation task. A wearable computer, acoustic tracking system, and see-through head mounted display (HMD) were used to wirelessly track users' head position and orientation while presenting a graphic representation of their virtual surroundings, through which the user walked using natural movement. As previous studies have shown that virtual environments can be used to train navigation, the ability to add natural movement to a type of virtual environment may enhance that training, based on the proprioceptive feedback gained by walking through the environment. Sixty participants were randomly assigned to one of three conditions: route drawing on printed floor plan, rehearsal in the actual facility, and rehearsal in a mixed reality (MR) environment. Participants, divided equally between male and female in each group, studied verbal directions of route, then performed three rehearsals of the route, with those in the map condition drawing it onto three separate printed floor plans, those in the practice condition walking through the actual facility, and participants in the MR condition walking through a three dimensional virtual environment, with landmarks, waypoints and virtual footprints. A scaling factor was used, with each step in the MR environment equal to three steps in the real environment, with the MR environment also broken into "tiles", like pages in an atlas, through which participant progressed, entering each tile in succession until they completed the entire route. Transfer of training testing that consisted of a timed traversal of the route through the actual facility showed a significant difference in route knowledge based on the total time to complete the route, and the number of errors committed while doing so, with "walkers" performing better than participants in the paper map or MR condition, although the effect was weak. Survey knowledge showed little difference among the three rehearsal conditions. Three standardized tests of spatial abilities did not correlate with route traversal time, or errors, or with 3 of the 4 orientation localization tasks. Within the MR rehearsal condition there was a clear performance improvement over the three rehearsal trials as measured by the time required to complete the route in the MR environment which was accepted as an indication that learning occurred. As measured using the Simulator Sickness Questionnaire, there were no incidents of simulator sickness in the MR environment. Rehearsal in the actual facility was the most effective training condition; however, it is often not an acceptable form of rehearsal given an inaccessible or hostile environment. Performance between participants in the other two conditions were indistinguishable, pointing toward continued experimentation that should include the combined effect of paper map rehearsal with mixed reality, especially as it is likely to be the more realistic case for mission rehearsal, since there is no indication that maps should be eliminated. To walk through the environment beforehand can enhance the Soldiers' understanding of their surroundings, as was evident through the comments from participants as they moved from MR to the actual space: "This looks like I was just here", and "There's that pole I kept having trouble with". Such comments lead one to believe that this is a tool to continue to explore and apply. While additional research on the scaling and tiling factors is likely warranted, to determine if the effect can be applied to other environments or tasks, it should be pointed out that this is not a new task for most adults who have interacted with maps, where a scaling factor of 1 to 15,000 is common in orienteering maps, and 1 to 25,000 in military maps. Rehearsal time spent in the MR condition varied widely, some of which could be blamed on an issue referred to as "avatar excursions", a system anomaly that should be addressed in future research. The proprioceptive feedback in MR was expected to positively impact performance scores. It is very likely that proprioceptive feedback is what led to the lack of simulator sickness among these participants. The design of the HMD may have aided in the minimal reported symptoms as it allowed participants some peripheral vision that provided orientation cues as to their body position and movement. Future research might include a direct comparison between this MR, and a virtual environment system through which users move by manipulating an input device such as a mouse or joystick, while physically remaining stationary. The exploration and confirmation of the training capabilities of MR as is an important step in the development and application of the system to the U.S. Army training mission. This experiment was designed to examine one potential training area in a small controlled environment, which can be used as the foundation for experimentation with more complex tasks such as wayfinding through an urban environment, and or in direct comparison to more established virtual environments to determine strengths, as well as areas for improvement, to make MR as an effective addition to the Army training mission.
Show less - Date Issued
- 2006
- Identifier
- CFE0001288, ucf:46917
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0001288
- Title
- FRIEND/FOE IDENTIFICATION ACCURACY AND SHOOTING PERFORMANCE: EFFECTS OF PRIOR TASK LOADING AND TIME PRESSURE.
- Creator
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Burke, Kelly, Hancock, Peter, University of Central Florida
- Abstract / Description
-
The current dismounted soldier and the soldier of the future will be loaded' with more information processing tasks while they perform shooting tasks. It is conceivable that some increased level of cognitive tasking may be performed simultaneously with required shooting tasks. The effect of cognitive load on shooting performance has been previously examined (Scribner and Harper, 2001). This study concentrated on the effect of various cognitive workload demands on a friend-foe...
Show moreThe current dismounted soldier and the soldier of the future will be loaded' with more information processing tasks while they perform shooting tasks. It is conceivable that some increased level of cognitive tasking may be performed simultaneously with required shooting tasks. The effect of cognitive load on shooting performance has been previously examined (Scribner and Harper, 2001). This study concentrated on the effect of various cognitive workload demands on a friend-foe discrimination shooting task in a single- and dual-task scenario. In light of this, it is imperative that the soldier not be overburdened mentally, which may result in decreased survivability and lethality. Specifically, this study was designed to examine the ability of the soldier to perform friend-foe target discrimination and shooting accuracy, with varying target exposure times, friendly target signatures, and varying cognitive load demands (working memory recall task). Using the Small Arms Simulator Testbed (SAST) we examined the effects of manipulations of working memory load and sustained information transfer, on shooting performance (as measured by target acquisition and friend/foe discrimination indices). Additionally, we investigated subjective measures of workload and stress. A secondary task, administered aurally, was given to subjects to attend to while they performed shooting (friend/foe discrimination task) scenarios: working memory recall task. Each type of task consisted of three levels of difficulty. Analysis of variance revealed significant differences for the memory recall task during shooting and non-shooting conditions. Furthermore, results showed that workload increased as a function of task demand, with associated decreases in shooting performance.
Show less - Date Issued
- 2007
- Identifier
- CFE0001681, ucf:47212
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0001681
