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- Title
- Frames and Phase Retrieval.
- Creator
-
Juste, Ted, Han, Deguang, Sun, Qiyu, Dutkay, Dorin, Wang, Dingbao, University of Central Florida
- Abstract / Description
-
Phase retrieval tackles the problem of recovering a signal after loss of phase. The phase problem shows up in many different settings such as X-ray crystallography, speech recognition, quantum information theory, and coherent diffraction imaging. In this dissertation we present some results relating to three topics on phase retrieval. Chapters 1 and 2 contain the relevant background materials. In chapter 3, we introduce the notion of exact phase-retrievable frames as a way of measuring aframe...
Show morePhase retrieval tackles the problem of recovering a signal after loss of phase. The phase problem shows up in many different settings such as X-ray crystallography, speech recognition, quantum information theory, and coherent diffraction imaging. In this dissertation we present some results relating to three topics on phase retrieval. Chapters 1 and 2 contain the relevant background materials. In chapter 3, we introduce the notion of exact phase-retrievable frames as a way of measuring aframe's redundancy with respect to its phase retrieval property. We show that, in the d-dimensional real Hilbert space case, exact phase-retrievable frames can be of any lengths between 2d ? 1 and d(d + 1)/2, inclusive. The complex Hilbert space case remains open.In chapter 4, we investigate phase-retrievability by studying maximal phase-retrievable subspaces with respect to a given frame. These maximal PR-subspaces can have different dimensions. We are able to identify the ones with the largest dimension and this can be considered as a generalizationof the characterization of real phase-retrievable frames. In the basis case, we prove that if M is a k-dimensional PR-subspace then |supp(x)| ? k for every nonzero vector x ? M . Moreover, if1 ? k (<) [(d + 1)/2], then a k-dimensional PR-subspace is maximal if and only if there exists a vector x ? M such that |supp(x)| = k.Chapter 5 is devoted to investigating phase-retrievable operator-valued frames. We obtain some characterizations of phase-retrievable frames for general operator systems acting on both finite and infinite dimensional Hilbert spaces; thus generalizing known results for vector-valued frames, fusion frames, and frames of Hermitian matrices.Finally, in Chapter 6, we consider the problem of characterizing projective representations that admit frame vectors with the maximal span property, a property that allows for an algebraic recov-ering of the phase-retrieval problem. We prove that every irreducible projective representation of a finite abelian group admits a frame vector with the maximal span property. All such vectors can be explicitly characterized. These generalize some of the recent results about phase-retrieval with Gabor (or STFT) measurements.
Show less - Date Issued
- 2019
- Identifier
- CFE0007660, ucf:52503
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0007660
- Title
- Spectrally Uniform Frames and Spectrally Optimal Dual Frames.
- Creator
-
Pehlivan, Saliha, Han, Deguang, Mohapatra, Ram, Sun, Qiyu, Tatari, Mehmet, University of Central Florida
- Abstract / Description
-
Frames have been useful in signal transmission due to the built in redundancy. In recent years, theerasure problem in data transmission has been the focus of considerable research in the case theerror estimate is measured by operator (or matrix) norm. Sample results include the characterizationof one-erasure optimal Parseval frames, the connection between two-erasure optimal Parsevalframes and equiangular frames, and some characterization of optimal dual frames.If iterations are allowed in...
Show moreFrames have been useful in signal transmission due to the built in redundancy. In recent years, theerasure problem in data transmission has been the focus of considerable research in the case theerror estimate is measured by operator (or matrix) norm. Sample results include the characterizationof one-erasure optimal Parseval frames, the connection between two-erasure optimal Parsevalframes and equiangular frames, and some characterization of optimal dual frames.If iterations are allowed in the reconstruction process of the signal vector, then spectral radiusmeasurement for the error operators is more appropriate then the operator norm measurement.We obtain a complete characterization of spectrally one-uniform frames (i.e., one-erasure optimalframes with respect to the spectral radius measurement) in terms of the redundancy distributionof the frame. Our characterization relies on the connection between spectrally optimal frames andthe linear connectivity property of the frame. We prove that the linear connectivity property isequivalent to the intersection dependence property, and is also closely related to the well-knownconcept of k-independent set. For spectrally two-uniform frames, it is necessary that the framemust be linearly connected. We conjecture that it is also necessary that a two-uniform frame mustbe n-independent. We confirmed this conjecture for the case when N = n+1, n+2, where N is thenumber of vectors in a frame for an n-dimensional Hilbert space. Additionally we also establishseveral necessary and sufficient conditions for the existence of an alternate dual frame to make the iterated reconstruction to work.
Show less - Date Issued
- 2013
- Identifier
- CFE0005111, ucf:50747
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0005111
- Title
- COMPARING MEDIA COVERAGE OF THE GULF OIL SPILL IN THE US AND UK: IMPLICATIONS FOR GLOBAL CRISIS COMMUNICATION.
- Creator
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Crytzer, Sarah, Coombs, Timothy, University of Central Florida
- Abstract / Description
-
The following research is a content analysis of 114 articles written by the American and British news media outlets in the first month following the BP Gulf oil spill in April 2010. The goal of the research was to identify any dominant frames evident in the reports and to compare the two countries to see if there was a difference in the dominant frames used. Positive, negative, and neutral tones were also evaluated to determine if there was a difference between the countries. The results show...
Show moreThe following research is a content analysis of 114 articles written by the American and British news media outlets in the first month following the BP Gulf oil spill in April 2010. The goal of the research was to identify any dominant frames evident in the reports and to compare the two countries to see if there was a difference in the dominant frames used. Positive, negative, and neutral tones were also evaluated to determine if there was a difference between the countries. The results show that both countries reports predominantly used an ecology and action frame, while British media outlets also used an economic frame. Both countries reported with primarily a negative and neutral tone. The implications of these findings for crisis communication managers are discussed.
Show less - Date Issued
- 2011
- Identifier
- CFE0003890, ucf:48743
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0003890
- Title
- OPTIMAL DUAL FRAMES FOR ERASURES AND DISCRETE GABOR FRAMES.
- Creator
-
Lopez, Jerry, Han, Deguang, University of Central Florida
- Abstract / Description
-
Since their discovery in the early 1950's, frames have emerged as an important tool in areas such as signal processing, image processing, data compression and sampling theory, just to name a few. Our purpose of this dissertation is to investigate dual frames and the ability to find dual frames which are optimal when coping with the problem of erasures in data transmission. In addition, we study a special class of frames which exhibit algebraic structure, discrete Gabor frames. Much work...
Show moreSince their discovery in the early 1950's, frames have emerged as an important tool in areas such as signal processing, image processing, data compression and sampling theory, just to name a few. Our purpose of this dissertation is to investigate dual frames and the ability to find dual frames which are optimal when coping with the problem of erasures in data transmission. In addition, we study a special class of frames which exhibit algebraic structure, discrete Gabor frames. Much work has been done in the study of discrete Gabor frames in $\mathbb^n$, but very little is known about the $\ell^2(\mathbb)$ case or the $\ell^2(\mathbb^d)$ case. We establish some basic Gabor frame theory for $\ell^2(\mathbb)$ and then generalize to the $\ell^2(\mathbb^d)$ case.
Show less - Date Issued
- 2009
- Identifier
- CFE0002614, ucf:48274
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0002614
- Title
- KAHO'OLAWE:A CASE STUDY OF A MOVEMENT AND THE MEDIA IN RECLAIMING A HAWAIIAN ISLAND.
- Creator
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Pedro, Danielle, Collins, Steve, University of Central Florida
- Abstract / Description
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The reclaiming of land can provide for heated controversy between communities. The controversy at the outset may seem simple, but is actually quite complex involving hegemonic factors such as social, political, and economic influence. One such factor is the media. This research examines media coverage via framing in a battle between the United States Navy and the Hawaiian people to claim ownership of a Hawaiian island named Kaho'olawe. This research analyzes 519 newspaper articles from...
Show moreThe reclaiming of land can provide for heated controversy between communities. The controversy at the outset may seem simple, but is actually quite complex involving hegemonic factors such as social, political, and economic influence. One such factor is the media. This research examines media coverage via framing in a battle between the United States Navy and the Hawaiian people to claim ownership of a Hawaiian island named Kaho'olawe. This research analyzes 519 newspaper articles from two Hawaiian newspapers--The Honolulu Star Bulletin and The Honolulu Advertiser--over a seven-year period. Six framing devices--advocate, economic, environment, Hawaiian, military, and political--are devised and implemented. This analysis shows that media frames change over time, when a frame changes so does the tone of the article, and each level of article showed different frame usage. For example, the headline of an article tended to use the political frame most. In addition, this analysis is one of the first to examine the use of pictures within each article and between newspapers. The findings suggest that the media's coverage of land debates needs to be examined further to include the use of media frames, quotes, and pictures.
Show less - Date Issued
- 2007
- Identifier
- CFE0001792, ucf:47266
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0001792
- Title
- FRAMES IN HILBERT C*-MODULES.
- Creator
-
Jing, Wu, Han, Deguang, University of Central Florida
- Abstract / Description
-
Since the discovery in the early 1950's, frames have emerged as an important tool in signal processing, image processing, data compression and sampling theory etc. Today, powerful tools from operator theory and Banach space theory are being introduced to the study of frames producing deep results in frame theory. In recent years, many mathematicians generalized the frame theory from Hilbert spaces to Hilbert C*-modules and got significant results which enrich the theory of frames. Also...
Show moreSince the discovery in the early 1950's, frames have emerged as an important tool in signal processing, image processing, data compression and sampling theory etc. Today, powerful tools from operator theory and Banach space theory are being introduced to the study of frames producing deep results in frame theory. In recent years, many mathematicians generalized the frame theory from Hilbert spaces to Hilbert C*-modules and got significant results which enrich the theory of frames. Also there is growing evidence that Hilbert C*-modules theory and the theory of wavelets and frames are tightly related to each other in many aspects. Both research fields can benefit from achievements of the other field. Our purpose of this dissertation is to work on several basic problems on frames for Hilbert C*-modules. We first give a very useful characterization of modular frames which is easy to be applied. Using this characterization we investigate the modular frames from the operator theory point of view. A condition under which the removal of element from a frame in Hilbert C*-modules leaves a frame or a non-frame set is also given. In contrast to the Hilbert space situation, Riesz bases of Hilbert C*-modules may possess infinitely many alternative duals due to the existence of zero-divisors and not every dual of a Riesz basis is again a Riesz basis. We will present several such examples showing that the duals of Riesz bases in Hilbert $C^*$-modules are much different and more complicated than the Hilbert space cases. A complete characterization of all the dual sequences for a Riesz basis, and a necessary and sufficient condition for a dual sequence of a Riesz basis to be a Riesz basis are also given. In the case that the underlying C*-algebra is a commutative W*-algebra, we prove that the set of the Parseval frame generators for a unitary group can be parameterized by the set of all the unitary operators in the double commutant of the unitary group. Similar result holds for the set of all the general frame generators where the unitary operators are replaced by invertible and adjointable operators. Consequently, the set of all the Parseval frame generators is path-connected. We also prove the existence and uniqueness of the best Parseval multi-frame approximations for multi-frame generators of unitary groups on Hilbert C*-modules when the underlying C*-algebra is commutative. For the dilation results of frames we show that a complete Parseval frame vector for a unitary group on Hilbert C*-module can be dilated to a complete wandering vector. For any dual frame pair in Hilbert C*-modules, we prove that the pair are orthogonal compressions of a Riesz basis and its canonical dual basis for some larger Hilbert C*-module. For the perturbation of frames and Riesz bases in Hilbert C*-modules we prove that the Casazza-Christensen general perturbation theorem for frames in Hilbert spaces remains valid in Hilbert C*-modules. In the Hilbert space setting, under the same perturbation condition, the perturbation of any Riesz basis remains a Riesz basis. However, this no longer holds for Riesz bases in Hilbert C*-modules. We also give a complete characterization on all the Riesz bases for Hilbert C*-modules such that the perturbation (under Casazza-Christensen's perturbation condition) of a Riesz basis still remains a Riesz basis.
Show less - Date Issued
- 2006
- Identifier
- CFE0001182, ucf:46859
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0001182
- Title
- The Priming Effects of Media Frames in Regard to News Images and Stereotypes Held by Hispanic Audiences.
- Creator
-
Morris, Meredith, Kinnally, William, Voss, Kimberly, Brown, Timothy, University of Central Florida
- Abstract / Description
-
This study applies priming, framing, and exemplification theories to examine the ways in which photos published with a news story influenced readers' judgments about the ethnicities of the people receiving emergency hunger services. Of particular interest were the perceptions of Caucasian respondents about minorities, and Hispanic perceptions about African Americans and other Hispanics. A sample of 506 college students was randomly assigned to read one of three versions of an online news...
Show moreThis study applies priming, framing, and exemplification theories to examine the ways in which photos published with a news story influenced readers' judgments about the ethnicities of the people receiving emergency hunger services. Of particular interest were the perceptions of Caucasian respondents about minorities, and Hispanic perceptions about African Americans and other Hispanics. A sample of 506 college students was randomly assigned to read one of three versions of an online news article about emergency hunger services in Central Florida. One version included two photographs of African American adults receiving food at a food bank. The second version included two photographs of Hispanic adults receiving food at a food bank. The third version was text-only and included no photographs. All three articles included base-rate statistics of ethnicities using emergency hunger services. Results showed images influence the way Caucasians and Hispanics perceive those people suffering from hunger. Key findings included that Caucasians in the study were susceptible to Hispanic primes, which altered their views on their perceptions about the number of Hispanics receiving emergency food services. However, Caucasians' perceptions of African Americans did not change. Additionally, Hispanic participants were affected by primes in such a way that limitations on societal advancement were perceived more strongly than those of the Caucasian participants. The difference between Caucasians' stereotypes regarding African Americans and Hispanics is an interesting development. The role of priming stereotype in relation to social issues is discussed.
Show less - Date Issued
- 2013
- Identifier
- CFE0004894, ucf:49667
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0004894
- Title
- CATCHING SATISFACTION: PERSONAL AND POLITICAL FRAMING IN THE HOMEBIRTH MOVEMENT.
- Creator
-
Pfaffl, Nasima, Huff-Corzine, Lin, University of Central Florida
- Abstract / Description
-
This thesis illuminates the experiences, motives, and framing process of a cohort of homebirthing women in Tucson, Arizona who embody the collective action frames of the national homebirth movement. A model of birth frame construction, alignment and adoption is presented that expands current theory on social movement framing processes, cognitive liberation, and life politics in health and self-help related movements. The study explores the evolution of homebirth midwifery nationally and...
Show moreThis thesis illuminates the experiences, motives, and framing process of a cohort of homebirthing women in Tucson, Arizona who embody the collective action frames of the national homebirth movement. A model of birth frame construction, alignment and adoption is presented that expands current theory on social movement framing processes, cognitive liberation, and life politics in health and self-help related movements. The study explores the evolution of homebirth midwifery nationally and locally. It articulates the main collective action frames that argue against standard maternity care and presents the alternatives proffered by the homebirth movement. It presents micro-level experiences of movement pioneers, macro-articulations of movement leaders, respondent's micro-level birth model framing processes; and how "life politics" have changed birth culture in America. Written materials augmented data obtained from in-depth interviews with (n=38) respondents who homebirthed in Tucson between 1970 and 2000. Content analysis was utilized and grounded theory was employed.
Show less - Date Issued
- 2006
- Identifier
- CFE0001072, ucf:46785
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0001072
- Title
- I'M BEING FRAMED: PHASE RETRIEVAL AND FRAME DILATION IN FINITE-DIMENSIONAL REAL HILBERT SPACES.
- Creator
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Greuling, Jason L, Han, Deguang, University of Central Florida
- Abstract / Description
-
Research has shown that a frame for an n-dimensional real Hilbert space offers phase retrieval if and only if it has the complement property. There is a geometric characterization of general frames, the Han-Larson-Naimark Dilation Theorem, which gives us the necessary and suffcient conditions required to dilate a frame for an n-dimensional Hilbert space to a frame for a Hilbert space of higher dimension k. However, a frame having the complement property in an n-dimensional real Hilbert space...
Show moreResearch has shown that a frame for an n-dimensional real Hilbert space offers phase retrieval if and only if it has the complement property. There is a geometric characterization of general frames, the Han-Larson-Naimark Dilation Theorem, which gives us the necessary and suffcient conditions required to dilate a frame for an n-dimensional Hilbert space to a frame for a Hilbert space of higher dimension k. However, a frame having the complement property in an n-dimensional real Hilbert space does not ensure that its dilation will offer phase retrieval. In this thesis, we will explore and provide what necessary and suffcient conditions must be satisfed to dilate a phase retrieval frame for an n-dimensional real Hilbert space to a phase retrieval frame for a k-dimensional real Hilbert.
Show less - Date Issued
- 2018
- Identifier
- CFH2000319, ucf:45868
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFH2000319
- Title
- THIRD GRADE SCIENCE TEACHERS' PERSPECTIVES ON IMPLEMENTING SENTENCE FRAMES AND WORD BANKS DURING SCIENCE LECTURES TO INCREASE THE WRITING LEVELS OF ENGLISH LANGUAGE LEARNERS.
- Creator
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Shimada, Mary-Margaret M, Grissom, Donita, University of Central Florida
- Abstract / Description
-
Each year, there is an increase of English Language Learners (ELLS) entering today's classrooms. A third grade teacher can be faced with having multiple ELLs in the classroom and still be required to teach them alongside native English speakers. Furthermore, third grade science teachers are also responsible for preparing all students in the classroom to comprehend and utilize scientific academic language based upon the Florida State Standards. Additionally, students are required on the FSA...
Show moreEach year, there is an increase of English Language Learners (ELLS) entering today's classrooms. A third grade teacher can be faced with having multiple ELLs in the classroom and still be required to teach them alongside native English speakers. Furthermore, third grade science teachers are also responsible for preparing all students in the classroom to comprehend and utilize scientific academic language based upon the Florida State Standards. Additionally, students are required on the FSA Florida Assessment to write about science content. Therefore, scaffolded instruction for ELLs, which will prepare them to write about science content is critical. This research study explored two third grade teachers' perspectives on implementing sentence frames and word banks in order to increase the writing levels of ELLs during science lectures. A professional development session was conducted by the researcher with the two participating third grade teachers regarding the use of sentence frames and word banks with ELLs while teaching science content. The teachers, thereafter, conducted a science lesson using the scaffolded strategy of sentence frames and word banks. It was found that when the third grade science teachers implemented sentence frames and word banks during science lectures, the ELLs showed improvement in their writing as well as their use of scientific academic language. Both teachers stated that their ELLs were somewhat completing more of their science worksheets than before the intervention. These results can conclude that implementing sentence frames and word banks during science lectures can increase the writing levels of ELLs during science lectures.
Show less - Date Issued
- 2017
- Identifier
- CFH2000199, ucf:45996
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFH2000199
- Title
- THE RELATIONSHIP OF STUDENT ACHIEVEMENT TO PRINICPALS'SELF-REPORTED USE OF THE FOUR FRAME THEORY.
- Creator
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Poniatowski, Donna, Taylor, Rosemarye, University of Central Florida
- Abstract / Description
-
This study was developed to provide information about the relationship of principals' use of Bolman and Deal's (1991) four frame model of leadership to student achievement. The collection and analysis of student Florida Comprehensive Assessment Testing (FCAT) data over a 2 year period served as a measure to indicate whether or not an increase in reading mean scale score occurred from 2004 to 2005. Comparative analysis of both sets of data using multiple regressions was used to...
Show moreThis study was developed to provide information about the relationship of principals' use of Bolman and Deal's (1991) four frame model of leadership to student achievement. The collection and analysis of student Florida Comprehensive Assessment Testing (FCAT) data over a 2 year period served as a measure to indicate whether or not an increase in reading mean scale score occurred from 2004 to 2005. Comparative analysis of both sets of data using multiple regressions was used to determine if there was a relationship between the self-reported leadership orientations of the principals and student achievement. In addition, the study was intended to contribute to the quantitative data produced concerning the use of the four frames, multi-framing and reframing by elementary and secondary leadership. Principals in this study were surveyed concerning their use of the structural, human resource, political and symbolic frames of leadership using the Leadership Orientations (Self) instrument constructed by Bolman and Deal (1990). The only restriction concerning usability of the returned survey was that the principal had to be at the same school during the 2004 and 2005 school years. Of the 52 surveys returned, 42 (73%) formed the population for this study. This study found that the human resource frame was used most often but that 59% of the elementary teachers and 93% of the secondary teachers multi-framed on a regular basis. The study also found that that the use of the political frame and symbolic frame has increased. The self-reported data indicated no difference in effectiveness as a leader or as a manager, unlike previous data which indicated that leaders and managers worked from different frames to effect organizational policies. The analysis of data also indicated that there was no difference in frame use between elementary and secondary principals. The data indicated no relationship between the principals' frame usage and student achievement as measured by increases in FCAT Reading mean scale scores for the years 2004 and 2005. The implications of this finding are that there are other variables than use of the four frame model that contribute to an increase in FCAT mean scale scores. These emergent factors within and without the organization that is the public school system transcend what the data show in this case. Based on the findings of this study and supported by the literature review, it appears that school organizations could benefit leadership practice and possibly student achievement by providing training in the political and symbolic frames. It might also be perceived from the data, which indicated no relationship between principals' frame usage and student achievement, that leadership might begin to foster awareness of how successful principals' identify emergent patterns in the system. This ability to guide the diverse and constantly changing educational landscape toward positive adjustments in the system may be best served by those who are most adept at multi-framing and reframing to ensure student achievement.
Show less - Date Issued
- 2006
- Identifier
- CFE0001246, ucf:46913
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0001246
- Title
- NEWS FRAMING: A COMPARISON OF THE NEW YORK TIMES AND THE PEOPLE'S DAILY COVERAGE OF SINO-U.S. SPY PLANE COLLISION OF APRIL 1, 2001.
- Creator
-
Zhang, Xiaoling, Costain, Gene, University of Central Florida
- Abstract / Description
-
On April 21, 2001, the United States and China faced their first major incident of the 21st century when a U.S. spy plane accidentally collided with a Chinese fighter plane. The dialogue that followed between the two countries, as well as the tenor of the incident as reported in the international press, provide some interesting and insightful glimpses into how these major powers handled the incident in the days and weeks that followed. Although the mainstream media in both China and the...
Show moreOn April 21, 2001, the United States and China faced their first major incident of the 21st century when a U.S. spy plane accidentally collided with a Chinese fighter plane. The dialogue that followed between the two countries, as well as the tenor of the incident as reported in the international press, provide some interesting and insightful glimpses into how these major powers handled the incident in the days and weeks that followed. Although the mainstream media in both China and the United States reported the key facts and elements of the incident in a similar fashion, the spin that was ultimately placed on the event by the Chinese press was clearly indicative of the Asian state's desire to portray the United States as being at fault; however, because both countries have an enormous stake in ensuring continued friendly relations for trade purposes, the Chinese press eventually adopted an official position that would allow the United States to "save face" while ensuring that the killed Chinese pilot involved was lauded as a fearless hero of the state and a martyr to its cause. To determine how these events played out in the respective mainstream media of China and the United States, as well as the international media, this research provides a review of the relevant literature to identify how the spy plane collision was portrayed, what elements are regarded as important for analysis. This study compares the two accounts from China and the U.S., and to a lesser extent, the international media, by grouping the media accounts into three separate dimensions: 1) visual framing, 2) contextual framing and 3) operational framing, to determine how these factors played out in the spy plane incident. The analysis of the media accounts is followed by a summary of the research in the concluding paragraph.
Show less - Date Issued
- 2005
- Identifier
- CFE0000427, ucf:46390
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0000427
- Title
- LEADERSHIP ORIENTATIONS OFCOMMUNITY COLLEGE PRESIDENTS AND THE ADMINISTRATORS WHO REPORT TO THEM: A FRAME ANALYSIS.
- Creator
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McArdle, Michele, Taylor, Rosemarye, University of Central Florida
- Abstract / Description
-
Presidents of Community Colleges and the administrators who reported directly to them were the subjects for this study based on the Four Frame Leadership Theory of Bolman and Deal (1990b). The Leadership Orientation (Self) Survey (LOS) was mailed to 169 community college presidents and administrators in the presidents' direct report teams. The final usable response rate of 69.82% to the survey fell within the acceptable range for education as defined by Boser and Green (1997). In addition...
Show morePresidents of Community Colleges and the administrators who reported directly to them were the subjects for this study based on the Four Frame Leadership Theory of Bolman and Deal (1990b). The Leadership Orientation (Self) Survey (LOS) was mailed to 169 community college presidents and administrators in the presidents' direct report teams. The final usable response rate of 69.82% to the survey fell within the acceptable range for education as defined by Boser and Green (1997). In addition, the subjects were asked to write about the most difficult challenge they had faced in their current position and how they handled that challenge. The purpose of this study was to determine (a) the usage of leadership frames from both groups; presidents and their administrative teams, (b) if gender or years of experience in their current positions were factors in leadership frame usage in each group, and (c) if there was a relationship between a president's frame usage and the frame usage of the members of the direct report team. The major findings were: 1. The presidents and administrators displayed the highest mean scores for the human resource frame with the mean scores of the three remaining frames (structural, political, and symbolic) clustering as a second unit of responses. In the narrative segment of the survey, the most frequently rated central theme among the presidents and the direct reports was the political frame. 2. The results from statistical analysis of the responses from both groups (presidents and the administrators who directly reported to them) did not show any statistically significant difference among frame use based on gender or number of years of experience in their positions. 3. The correlation coefficients did not indicate that there was a relationship in either direction regarding leadership style between the two groups (presidents and administrators). A phenomenological analysis of the scenario statements from these two groups indicated that presidents who used the political frame as a central theme tended to have administrators who also used the political frame as one or as a pair of central themes. Presidents who used the symbolic frame as a central theme tended to have administrators who used all four frames as central themes in their narratives. 4. A fourth finding was the discrepancy in the ability of the leaders to use multiple frames as demonstrated in the results from the quantitative and qualitative findings. The quantitative data suggested that these leaders were practicing the techniques of multi-framing more than one-half of the time. Contrary to this finding, the qualitative data showed that 5 of 30 scenario statements showed paired frames being used as central frames. 5. One additional finding based on the qualitative statements by presidents and their administrators revealed much thought and intentional practice in the leaders' ability to build teams.
Show less - Date Issued
- 2008
- Identifier
- CFE0002301, ucf:47872
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0002301
- Title
- An Analysis of Terrorism and Mental Health in Mass Shootings as Perceived by the Media.
- Creator
-
Sanchez, Amairini, Corzine, Harold, Huff-Corzine, Lin, Reckdenwald, Amy, University of Central Florida
- Abstract / Description
-
Public mass shootings are the rarest type of mass murder in the United States. Nevertheless, the media tends to focus on mass murders that appear to be the most newsworthy. The most sensational mass murders are those that have the highest victim count, that target perfect victims, and that occur in a public location. Terrorism and mental health are two separate frames that are often used by the media when reporting a mass shooting event. This creates a lack of accurate reporting that displays...
Show morePublic mass shootings are the rarest type of mass murder in the United States. Nevertheless, the media tends to focus on mass murders that appear to be the most newsworthy. The most sensational mass murders are those that have the highest victim count, that target perfect victims, and that occur in a public location. Terrorism and mental health are two separate frames that are often used by the media when reporting a mass shooting event. This creates a lack of accurate reporting that displays a distorted image of mass shootings and affects the public's perception. This study evaluated frames used by the media specifically terrorism and mental health as well as others that came up as a result of this study. Using the Active Shooter Incidents in the United States report, a sample of 75 mass shootings were selected that occurred between 2007 and 2017. This was a qualitative study and consisted of a content analysis of news reports for each of the mass shootings in the sample. Findings revealed several themes that are commonly used by the media when reporting on the mass shooting events. The most common frames found were mental health, terrorism, domestic violence, financial/employment struggles, lack of social skills/loner, political attacks, and criminal/violent backgrounds. Mental health was the most common frame used by media reports to describe motive for the attack. In addition, offenders that were identified as Muslim in the sample were all investigated as having possible terrorism ties. This analysis allowed for an overview of major themes that are commonly present in media reports. The wide sample used in this analysis included the most recent mass shootings in conjunction with the commonly researched mass shootings that have occurred in previous years which supplements the overall literature in this topic.
Show less - Date Issued
- 2018
- Identifier
- CFE0007092, ucf:51948
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0007092
- Title
- THE PORTRAYAL OF TEEN PREGNANCY IN THE TV SERIES "THE SECRET LIFE OF THE AMERICAN TEENAGER".
- Creator
-
Lovell, Erin, DeLorme, Denise, University of Central Florida
- Abstract / Description
-
The aim of the current study was to investigate the way teen pregnancy is portrayed in Seasons 1 and 2 of the television drama The Secret Life of the American Teenager. Framing theory and social cognitive theory were used as guiding frameworks for exploring the way the main character's pregnancy was presented and the way this presentation may influence the ideas and behaviors of viewers. A qualitative content analysis was conducted to examine portrayals in the first 23 episodes. Results...
Show moreThe aim of the current study was to investigate the way teen pregnancy is portrayed in Seasons 1 and 2 of the television drama The Secret Life of the American Teenager. Framing theory and social cognitive theory were used as guiding frameworks for exploring the way the main character's pregnancy was presented and the way this presentation may influence the ideas and behaviors of viewers. A qualitative content analysis was conducted to examine portrayals in the first 23 episodes. Results indicated that teen pregnancy was portrayed in five major ways: as Dramatic, as Identity, as Manageable, as Transformative, and as Serious. Overall, the findings suggest that teen pregnancy was presented in ways that encourage viewers to perceive this issue as positive and negative, with clearly positive outcomes.
Show less - Date Issued
- 2011
- Identifier
- CFE0003691, ucf:48806
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0003691
- Title
- Multiculturalism as Reported by the European Online Press: A Qualitative Study on the Manifestation of Othering Discourses.
- Creator
-
Chakrabarti, Shomik, Musambira, George, Sandoval, Jennifer, Hastings, Sally, University of Central Florida
- Abstract / Description
-
This study critically examined how issues of multiculturalism and Muslim immigration are discursively constructed within the English language European online press. Through the use of a frame analysis as well as a more focused discourse analysis, an examination was undertaken to uncover how (")us(") versus (")them(") perspectives were manifest within a public discourse. A total of 132 articles from The Daily Mail, Le Monde Diplomatique, Dutchnews.nl, Spiegel Online and The International...
Show moreThis study critically examined how issues of multiculturalism and Muslim immigration are discursively constructed within the English language European online press. Through the use of a frame analysis as well as a more focused discourse analysis, an examination was undertaken to uncover how (")us(") versus (")them(") perspectives were manifest within a public discourse. A total of 132 articles from The Daily Mail, Le Monde Diplomatique, Dutchnews.nl, Spiegel Online and The International Herald Tribune were selected using a systematic sampling method based on the results of a search query for multiculturalism at each news site. The analysis of the data corpus revealed the news media's depiction of multiculturalism and Muslim immigrants as not wholly negative on the surface but under closer scrutiny revealed discursive and linguistic techniques that consistently marginalized and (")othered(") them. The themes found in the data corpus also illuminated a trend of the subordinated population as lacking proper representation and always being spoken for by the news media.
Show less - Date Issued
- 2015
- Identifier
- CFE0005587, ucf:50241
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0005587
- Title
- THE EFFECTS OF VIDEO FRAME DELAY AND SPATIAL ABILITY ON THE OPERATION OF MULTIPLE SEMIAUTONOMOUS AND TELE-OPERATED ROBOTS.
- Creator
-
Sloan, Jared, Stanney, Kay, University of Central Florida
- Abstract / Description
-
The United States Army has moved into the 21st century with the intent of redesigning not only the force structure but also the methods by which we will fight and win our nation's wars. Fundamental in this restructuring is the development of the Future Combat Systems (FCS). In an effort to minimize exposure of front line soldiers the future Army will utilize unmanned assets for both information gathering and when necessary engagements. Yet this must be done judiciously, as the bandwidth for...
Show moreThe United States Army has moved into the 21st century with the intent of redesigning not only the force structure but also the methods by which we will fight and win our nation's wars. Fundamental in this restructuring is the development of the Future Combat Systems (FCS). In an effort to minimize exposure of front line soldiers the future Army will utilize unmanned assets for both information gathering and when necessary engagements. Yet this must be done judiciously, as the bandwidth for net-centric warfare is limited. The implication is that the FCS must be designed to leverage bandwidth in a manner that does not overtax computational resources. In this study alternatives for improving human performance during operation of teleoperated and semi-autonomous robots were examined. It was predicted that when operating both types of robots, frame delay of the semi-autonomous robot would improve performance because it would allow operators to concentrate on the constant workload imposed by the teleoperated while only allocating resources to the semi-autonomous during critical tasks. An additional prediction was that operators with high spatial ability would perform better than those with low spatial ability, especially when operating an aerial vehicle. The results can not confirm that frame delay has a positive effect on operator performance, though power may have been an issue, but clearly show that spatial ability is a strong predictor of performance on robotic asset control, particularly with aerial vehicles. In operating the UAV, the high spatial group was, on average, 30% faster, lazed 12% more targets, and made 43% more location reports than the low spatial group. The implications of this study indicate that system design should judiciously manage workload and capitalize on individual ability to improve performance and are relevant to system designers, especially in the military community.
Show less - Date Issued
- 2005
- Identifier
- CFE0000430, ucf:46379
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0000430
- Title
- Understanding Gender and Sexuality in a Gay/Straight Alliance.
- Creator
-
Duesterhaus, Megan, Grauerholz, Elizabeth, Lynxwiler, John, Carter, James, Schippert, Claudia, University of Central Florida
- Abstract / Description
-
Gay/Straight Alliances aimed at providing sexual minority youth and their allies with support, social events, and activism and education opportunities have proliferated in high schools in the United States over the past two decades. This study employs a qualitative, grounded theory approach to examine how sexual minority youth and their allies navigate gender, sexuality, and social movement participation. A year and a half of observation and 16 semi-structured individual interviews were...
Show moreGay/Straight Alliances aimed at providing sexual minority youth and their allies with support, social events, and activism and education opportunities have proliferated in high schools in the United States over the past two decades. This study employs a qualitative, grounded theory approach to examine how sexual minority youth and their allies navigate gender, sexuality, and social movement participation. A year and a half of observation and 16 semi-structured individual interviews were conducted with Gay/Straight Alliance members in a high school setting in the southeastern United States. The study reveals that, through the lens of frame analysis, the G/SA is analogous to larger and more organized social movement organizations. The findings also suggest members often struggle and engage with issues surrounding sexuality, including its origins, coming out as a process, and judgments and evaluations surrounding sex and desire. Additionally, the findings address elements of gender conformity and non-conformity.
Show less - Date Issued
- 2012
- Identifier
- CFE0004228, ucf:49008
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0004228
- Title
- NARRATIVE BASED FEAR APPEALS: MANIPULATING GRAMMATICAL PERSON AND MESSAGE FRAME TO PROMOTE HPV AWARENESS AND RESPONSIBLE SEXUAL CONDUCT.
- Creator
-
Spear, Jennifer, Miller, Ann, University of Central Florida
- Abstract / Description
-
The utility of narrative as a persuasive mechanism has been increasingly investigated in recent years especially within the context of health behaviors. Although many studies have noted the effectiveness of narrative-based persuasive appeals, conceptual inconsistencies have made it difficult to determine what specific aspects of narrative messages lead to the most effective persuasive outcomes. In the present study, 145 female college students were randomly assigned to read one of four...
Show moreThe utility of narrative as a persuasive mechanism has been increasingly investigated in recent years especially within the context of health behaviors. Although many studies have noted the effectiveness of narrative-based persuasive appeals, conceptual inconsistencies have made it difficult to determine what specific aspects of narrative messages lead to the most effective persuasive outcomes. In the present study, 145 female college students were randomly assigned to read one of four narrative health messages about a female freshman college students experiences with the human papillomavirus (HPV). Two elements of the narrative message structure were manipulated: the message frame (gain framed vs. loss framed), and the grammatical person of the text (first-person vs. third-person).The messages were presented via the medium of an online blog. After reading a narrative participants responded to a brief questionnaire designed to measure perceptions of threat regarding HPV contraction, perceptions of efficacy regarding HPV prevention, and intentions to get the Gardasil vaccine. Participants exposed to loss framed messages reported higher levels of perceived threat (susceptibility and severity) than participants exposed to gain framed messages although participants in the gain framed message conditions reported higher levels of perceived self-efficacy. Significant correlations were also found between levels of reported character identification and the two threat variables. No effects were found for grammatical person.
Show less - Date Issued
- 2011
- Identifier
- CFE0003997, ucf:48673
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0003997
- Title
- A MULTI-LAYER FPGA FRAMEWORK SUPPORTING AUTONOMOUS RUNTIME PARTIAL RECONFIGURATION.
- Creator
-
Tan, Heng, DeMara, Ronald, University of Central Florida
- Abstract / Description
-
Partial reconfiguration is a unique capability provided by several Field Programmable Gate Array (FPGA) vendors recently, which involves altering part of the programmed design within an SRAM-based FPGA at run-time. In this dissertation, a Multilayer Runtime Reconfiguration Architecture (MRRA) is developed, evaluated, and refined for Autonomous Runtime Partial Reconfiguration of FPGA devices. Under the proposed MRRA paradigm, FPGA configurations can be manipulated at runtime using on-chip...
Show morePartial reconfiguration is a unique capability provided by several Field Programmable Gate Array (FPGA) vendors recently, which involves altering part of the programmed design within an SRAM-based FPGA at run-time. In this dissertation, a Multilayer Runtime Reconfiguration Architecture (MRRA) is developed, evaluated, and refined for Autonomous Runtime Partial Reconfiguration of FPGA devices. Under the proposed MRRA paradigm, FPGA configurations can be manipulated at runtime using on-chip resources. Operations are partitioned into Logic, Translation, and Reconfiguration layers along with a standardized set of Application Programming Interfaces (APIs). At each level, resource details are encapsulated and managed for efficiency and portability during operation. An MRRA mapping theory is developed to link the general logic function and area allocation information to the device related physical configuration level data by using mathematical data structure and physical constraints. In certain scenarios, configuration bit stream data can be read and modified directly for fast operations, relying on the use of similar logic functions and common interconnection resources for communication. A corresponding logic control flow is also developed to make the entire process autonomous. Several prototype MRRA systems are developed on a Xilinx Virtex II Pro platform. The Virtex II Pro on-chip PowerPC core and block RAM are employed to manage control operations while multiple physical interfaces establish and supplement autonomous reconfiguration capabilities. Area, speed and power optimization techniques are developed based on the developed Xilinx prototype. Evaluations and analysis of these prototype and techniques are performed on a number of benchmark and hashing algorithm case studies. The results indicate that based on a variety of test benches, up to 70% reduction in the resource utilization, up to 50% improvement in power consumption, and up to 10 times increase in run-time performance are achieved using the developed architecture and approaches compared with Xilinx baseline reconfiguration flow. Finally, a Genetic Algorithm (GA) for a FPGA fault tolerance case study is evaluated as a ultimate high-level application running on this architecture. It demonstrated that this is a hardware and software infrastructure that enables an FPGA to dynamically reconfigure itself efficiently under the control of a soft microprocessor core that is instantiated within the FPGA fabric. Such a system contributes to the observed benefits of intelligent control, fast reconfiguration, and low overhead.
Show less - Date Issued
- 2007
- Identifier
- CFE0001933, ucf:47448
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0001933
