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Electronic Theses and Dissertations

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Fear And Loathing In The Super Organism: Foraging Strategy Doesn't Change Forager Response In A Landscape Of Fear., Philip Schadegg Jan 2019

Fear And Loathing In The Super Organism: Foraging Strategy Doesn't Change Forager Response In A Landscape Of Fear., Philip Schadegg

Electronic Theses and Dissertations

Understanding how predators impact keystone species, like ants, is very important for our understanding of ecology because of ants' importance in shaping community dynamics and ecosystem functions. In this thesis I present research investigating the role of the ant-specialized spider Anasaitis canosa in influencing the foraging behavior of four ant species (Formica pallidefulva, Odontomachus ruginodis, Pheidole obscurithorax & Solenopsis invicta). Collectively, these four species use foraging strategies exhibited by most ants. I conducted two experiments to quantify the impacts of spider predation on ant prey. The first used forty colonies of four ant species to investigate how A. canosa changed …

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Macrolinguistic Analysis Of Discourse Production In People With Aphasia, Individuals With Mild Cognitive Impairment, And Survivors Of Traumatic Brain Injury, Stephanie Eaton Jan 2019

Macrolinguistic Analysis Of Discourse Production In People With Aphasia, Individuals With Mild Cognitive Impairment, And Survivors Of Traumatic Brain Injury, Stephanie Eaton

Electronic Theses and Dissertations

This study examined the macrolinguistic features of three genres (single picture description, sequential picture description, and story retell) of discourse samples collected from participants with acquired communication disorders (including two speakers with aphasia, two with mild cognitive impairment, and two with traumatic brain injury) and unimpaired controls (n=6). Comparisons were made to investigate group and genre differences. Standardized assessment scores of cognitive and linguistic evaluations were collected and correlated to features of macrolinguistic discourse analysis. Participants with acquired communication disorders performed best on the story retell discourse task compared to single picture description and sequential picture description. Significant measures for …

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Metastable-State Photoacids: Synthesis, Properties, And Applications, Parth Patel Jan 2019

Metastable-State Photoacids: Synthesis, Properties, And Applications, Parth Patel

Electronic Theses and Dissertations

Reversible photochromic compounds have the ability to reversibly change its color when it absorbs photons of a particular wavelength. This process of color change is a consequence of structural changes within the compound, such as cis-trans photo-isomerization. Some examples of photochromic compounds are spiropyrans, spirooxazines, diarylethenes and azobenzenes. These compounds have been extensively studied for decades, and are used in various applications such as biomedicine, chemical sensors and harvesting solar energy. However, majority of photochromic compounds are initially activated by ultraviolet (UV) light. The use of UV light is harmful for biological applications and photo-degrade the compound over repeated use. …

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Evaluating Pedagogical Methods That Influence Homework Assignment Completion, Kirk Sawyer Jan 2019

Evaluating Pedagogical Methods That Influence Homework Assignment Completion, Kirk Sawyer

Electronic Theses and Dissertations

College students enrolled in an online introductory engineering course are not completing their homework assignments at an acceptable rate which impacts them, the instructor, and the college. This research study employed a quasi-experimental evaluation model to assess the effectiveness of two pedagogical methods designed to positively influence student homework completion rates and student attitudes toward homework. Despite evidence that grading penalties encourage students to submit their homework assignments, such strategies have historically been unsuccessful for the course used in this study. The researcher designed two pedagogical interventions, along with a survey instrument, to measure the impact of the interventions on …

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A Survey Of Investing And Retirement Knowledge And Preferences Of Florida Preservice Teachers, Richard Thripp Jan 2019

A Survey Of Investing And Retirement Knowledge And Preferences Of Florida Preservice Teachers, Richard Thripp

Electronic Theses and Dissertations

New teachers are facing lower pay and less generous retirement benefits than the prior generation, yet their financial and retirement knowledge, concerns, and preferences have received little attention. To investigate these areas, the author developed a 39-item survey instrument and administered it to 314 preservice teachers in undergraduate teacher education courses at the University of Central Florida, who were primarily female elementary and early childhood education juniors and seniors ages 18–25. Florida public employees are offered an unusual choice between a traditional pension plan and a defined-contribution plan similar to a 401(k) in which they can select their own investments, …

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The Aftermath: A Culturally Responsive Mathematical Intervention To Aid Students Affected By Natural Disasters, Brianna Kurtz Jan 2019

The Aftermath: A Culturally Responsive Mathematical Intervention To Aid Students Affected By Natural Disasters, Brianna Kurtz

Electronic Theses and Dissertations

On September 20, 2017, Hurricane Maria struck the island of Puerto Rico. The damage was extensive, and many people found themselves to be natural disaster refugees. As a result, schools in Central Florida saw an influx of new students who had their educations interrupted by the disaster and now were resuming school in a new language of instruction. These students not only faced linguistic challenges but also academic differences due to the high prevalence of poverty and the effects of neocolonialism in their previous schooling. This mixed methods study implemented an intensive intervention in probability to aid students in developing …

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The Push Out: A Disproportionality Study On Discipline In The State Of Florida, Manouchka Pierre Jan 2019

The Push Out: A Disproportionality Study On Discipline In The State Of Florida, Manouchka Pierre

Electronic Theses and Dissertations

This mixed method sequential exploratory study was conducted to emphasize and investigate disproportionality in discipline, noting the prevalence of the issue of equity and the salience of FL as context. This study applied the extant model for investigating disproportionality in a setting where such an investigation is highly relevant due to Florida's statistical positioning in the area of student discipline. This study investigated for potential biases that guide differences in the rates that males and Blacks experience exclusionary discipline within the 67 regular school districts. The analysis from this study, which used relative rate ratio and policy analysis, presents results …

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Building Unity Through State Narratives: The Evolving British Media Discourse During World War Ii, 1939-1941, Colin Cook Jan 2019

Building Unity Through State Narratives: The Evolving British Media Discourse During World War Ii, 1939-1941, Colin Cook

Electronic Theses and Dissertations

The British media discourse evolved during the first two years of World War II, as state narratives and censorship began taking a more prominent role. I trace this shift through an examination of newspapers from three British regions during this period, including London, the Southwest, and the North. My research demonstrates that at the start of the war, the press featured early unity in support of the British war effort, with some regional variation. As the war progressed, old political and geographical divergences came to the forefront in coverage of events such as Prime Minister Chamberlain's resignation. The government became …

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Cme Church In The Memory Of The Civil Rights Movement, Brandon Nightingale Jan 2019

Cme Church In The Memory Of The Civil Rights Movement, Brandon Nightingale

Electronic Theses and Dissertations

The Christian Methodist Episcopal (CME) Church is a historically black church rooted in the South that was established in 1870. The church had been viewed historically as an "old slavery" church, due to its close relationship to the White Methodist Episcopal Church (formerly Methodist Episcopal Church, South (MECS). The history of the denomination encouraged the view that CME churches and schools had not been active in the Civil Rights Movement. Closer research into the denomination's archives from 1954, when the church changed its name from "Colored" to "Christian" up to the 1970s, when the movement transitioned, challenges that interpretation. From …

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Computational Imaging Systems For High-Speed, Adaptive Sensing Applications, Yangyang Sun Jan 2019

Computational Imaging Systems For High-Speed, Adaptive Sensing Applications, Yangyang Sun

Electronic Theses and Dissertations

Driven by the advances in signal processing and ubiquitous availability of high-speed low-cost computing resources over the past decade, computational imaging has seen the growing interest. Improvements on spatial, temporal, and spectral resolutions have been made with novel designs of imaging systems and optimization methods. However, there are two limitations in computational imaging. 1), Computational imaging requires full knowledge and representation of the imaging system called the forward model to reconstruct the object of interest. This limits the applications in the systems with a parameterized unknown forward model such as range imaging systems. 2), the regularization in the optimization process …

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Reexamining The Relationship Between Divided Government And Voter Turnout, Heidi Beck Jan 2019

Reexamining The Relationship Between Divided Government And Voter Turnout, Heidi Beck

Electronic Theses and Dissertations

This thesis reexamines the effect of divided government on voter turnout originally posited by Franklin and Hirczy de Miño (1998), which suggested that each year of exposure to divided government resulted in a cumulative negative effect on voters leading to alienation and lower turnout. It reconsiders this argument using more recent data, given that voter turnout in U.S. presidential elections (as measured by the Voting Eligible Population) has increased since 2000, even though divided government has occurred during this period. This thesis also uses new data and methods to address concerns about the original aggregate level research design. The research …

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Community Responses To Mass Casualty Events: A Mixed Method Approach, Jeffrey Payne Jan 2019

Community Responses To Mass Casualty Events: A Mixed Method Approach, Jeffrey Payne

Electronic Theses and Dissertations

This dissertation explores how traits of a mass casualty event and community institutionalization affect how a community demonstrates solidarity after a mass casualty event. A systematic examination of mass casualty events along these lines has not been conducted before. Theoretically, individual helping behaviors like altruism help explain individual involvement in demonstrations of solidarity while solidarity and resilience help in explaining group behaviors. A typology is proposed that breaks up mass casualty events into four different types: terrorism, criminal, weather and accidents. These types of events make up the majority of non-war mass casualty events. Experimentally a sample of students is …

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Acoustic Ecology And Sound Mapping The University Of Central Florida Main Campus, Robert Clarke Jan 2019

Acoustic Ecology And Sound Mapping The University Of Central Florida Main Campus, Robert Clarke

Electronic Theses and Dissertations

"Acoustic Ecology and Sound Mapping the University of Central Florida Main Campus" explores the intersection of place and space, sound studies and acoustic ecology, visualization, and archives. The end result consists of a collection of "soundwalk" and stationary recordings conducted from 2016-2019 at the University of Central Florida (UCF) main campus in Orlando presented as an online Sound Map. This archive previously did not exist and provides a snapshot of the various sounds heard throughout the campus as well as a starting point and context for future research into this still-emerging field of acoustic ecology and sound studies. While the …

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Discovering Latent Gender Bias In Children's Stem Literature, Christine Herlihy Jan 2019

Discovering Latent Gender Bias In Children's Stem Literature, Christine Herlihy

Electronic Theses and Dissertations

A mixed method, exploratory, sequential research design was conducted to investigate the presence of latent bias in early childhood STEM literature content, applying a non-biased, sociocultural, STEM identity, theoretical framework. A survey of children's perceptions of gender and a content analysis found unintentional bias. Exploratory findings confirmed 102 children were gendering images. An examination of the relationship between the participants' gender and how the participant gendered AND preferred the images indicated differences existed between boys and girls. Children preferred images perceived as matching their own, with statistical significance. Girls were found to prefer images less than boys AND they were …

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Utilizing Geographic Information Systems To Record And Analyze Osteoarthritis Data In Joints Of The Arm: A Methodology For Dry Bones, Adam Biernaski Jan 2019

Utilizing Geographic Information Systems To Record And Analyze Osteoarthritis Data In Joints Of The Arm: A Methodology For Dry Bones, Adam Biernaski

Electronic Theses and Dissertations

Osteoarthritis (OA) is one of the most common pathologies encountered in dry bone contexts. However, even with the wealth of publications on documenting the presence of OA from skeletons, these studies prove to be largely incomparable due to different scoring methodologies and procedures in calculating prevalence. The standardization of a new OA data collection procedure would mitigate variability in evaluating, scoring, and calculating the prevalence of OA, thus allowing accurate comparison between studies. However, this level of data collection has often been described as unwieldy and lacking concordance. This research outlines a new methodology that utilizes Geographic Information Systems (GIS) …

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Determining Differential Effects Of Interleukin-2 On Innate And Adaptive Immune Cells In Lymphoid Organs And The Gastrointestinal Tract, Ayushi Singh Jan 2019

Determining Differential Effects Of Interleukin-2 On Innate And Adaptive Immune Cells In Lymphoid Organs And The Gastrointestinal Tract, Ayushi Singh

Electronic Theses and Dissertations

Interleukin-2 (IL-2) is a pleiotropic cytokine demonstrated to be effective in treating cancer. However, the clinical use of IL-2 can be associated with severe side effects including gastrointestinal toxicity (GT). Similar GT symptoms are observed in inflammatory diseases such as CD (CD). Interestingly mounting evidence indicates a role for IL-2 in CD, but the underlying mechanisms are unknown. Indeed, studies on the in-vivo activities of IL-2 have mostly focused on secondary lymphoid organs and immune cells associated with them. Very few studies have addressed how IL-2 signals impact populations of immune cells in the gut. Here, we aim to identify …

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Partnering With Paraprofessionals: Expanding Preschool Children's Responses Through Dialogic Reading, Juliana Hirn Jan 2019

Partnering With Paraprofessionals: Expanding Preschool Children's Responses Through Dialogic Reading, Juliana Hirn

Electronic Theses and Dissertations

Shared interactive reading is an evidence-based practice where professionals can collaborate to promote literacy and language skills in young children. Providing children with developmental disabilities (DD) the opportunity to gain language and preliteracy skills in early intervention is critical for their development as they are at a higher risk for falling behind in academics compared to their age-matched peers. This study evaluated the effectiveness of dialogic reading (DR) for children with DD. DR has been shown to be an effective strategy to teach typically developing preschool-aged children vocabulary, language, and literacy skills, however research in children with DD is limited. …

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Repro, But Make It Fashion: Discourses On Sex, Sexuality, And Reproduction In Teen Vogue Magazine, Estefany Londono Jan 2019

Repro, But Make It Fashion: Discourses On Sex, Sexuality, And Reproduction In Teen Vogue Magazine, Estefany Londono

Electronic Theses and Dissertations

There are many possible sources for youth to become educated about sexuality and reproduction, however the media are cited as particularly powerful and prominent sources of information (Jaworski, 2009). Particularly in an era in which abstinence-only messaging dominates sex education, media become a source to which young people turn and where they receive much of their sex-based messaging. Due to backlash over problematic content that perpetuates gender stereotypes and relays harmful messages about sex and sexuality, some magazines, including Teen Vogue, have attempted to shift towards more feminist-minded content (Keller, 2011, Milkie, 2002). This study is a qualitative critical feminist …

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The Characterization Of Condom Lubricants And Personal Hygiene Products Using Dart-Tofms And Gc- Ms And The Investigation Of Gold Nanoparticle Behavior In Water And The Interaction With Blood Serum Proteins, Yasmine Moustafa Jan 2019

The Characterization Of Condom Lubricants And Personal Hygiene Products Using Dart-Tofms And Gc- Ms And The Investigation Of Gold Nanoparticle Behavior In Water And The Interaction With Blood Serum Proteins, Yasmine Moustafa

Electronic Theses and Dissertations

This dissertation is divided into two independent research projects. First, condom lubricants, sexual lubricants, and personal hygiene products (PHPs) were studied using direct analysis in real time-time-of-flight-mass spectrometry (DART-TOFMS) and gas chromatography-mass spectrometry (GC-MS). The purpose addressed the concern of perpetrators resorting to new tactics, i.e. using condoms to remove seminal fluid that could provide a DNA link to a suspect, leading to the need of the consideration of condom lubricants as pieces of sexual assault evidence. Due to condom lubricants having a chemical composition resembling PHPs, the investigation of both sample groups was analyzed to prevent false positives. Although …

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Cryogenic Performance Projections For Ultra-Small Oxide-Free Vertical-Cavity Surface-Emitting Lasers, Mina Bayat Jan 2019

Cryogenic Performance Projections For Ultra-Small Oxide-Free Vertical-Cavity Surface-Emitting Lasers, Mina Bayat

Electronic Theses and Dissertations

Small-sized vertical-cavity surface-emitting laser (VCSEL) may offer very low power consumption along with high reliability for cryogenic data transfer. Cryogenic data transfer has application in supercomputers and superconducting for efficient computing and also focal plane array cameras operating at 77 K, and at the lower temperature of 4 K for data extraction from superconducting circuits. A theoretical analysis is presented for 77 K and 4 K operation based on small cavity, oxide-free VCSEL sizes of 2 to 6 µm, that have been shown to operate efficiently at room temperature. Temperature dependent operation for optimally-designed VCSELs are studied by calculating the …

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Mapping Addiction: A Digital Psychogeographic Approach To America's Addiction Epidemic, Clayton Benjamin Jan 2019

Mapping Addiction: A Digital Psychogeographic Approach To America's Addiction Epidemic, Clayton Benjamin

Electronic Theses and Dissertations

Focusing on policy consultation, my dissertation consults on the current US addiction epidemic and aims to answer, "What is our disposition to addiction?" Borrowing and clarifying Ulmer's MEmorial method, as established in his text Electronic Monuments, the dissertation combines the ancient Greek practice of theoria, Deleuzian theory, and psychogeographic counter-mapping methods to trace ways in which ideological apparatuses construct addiction. The aim of the dissertation is to reveal an abject value by constructing MEmorials which provide space for individuals to mourn loss and see their relation to that loss. Through mourning, individuals strengthen their ties to other community members and …

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Towards Constructing A Comprehensive Framework Of Smart Destinations, Ekaterina Sorokina Jan 2019

Towards Constructing A Comprehensive Framework Of Smart Destinations, Ekaterina Sorokina

Electronic Theses and Dissertations

Smart initiatives are gaining popularity from the development of smart homes and smart communities to the emergence of smart cities all around the world. Smart technologies like AI-powered digital assistants are becoming more widespread within the tourism industry, giving rise to the concept of smart destinations. Despite the growing awareness, the theoretical and practical knowledge of smart destinations remains fragmented and mostly speculative. The primary objectives of this research study are: 1) to develop a comprehensive framework of smart destinations through multiple case studies of the emerging smart destinations and interviews with the industry stakeholders, and 2) to construct and …

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Design And Fabrication Of Scalable Multifunctional Multimaterial Fibers And Textiles, Felix Tan Jan 2019

Design And Fabrication Of Scalable Multifunctional Multimaterial Fibers And Textiles, Felix Tan

Electronic Theses and Dissertations

Multimaterial fibers eschew the traditional mono-material structures typical of traditional optical fibers for novel internal architectures that combine disparate materials with distinct optical, mechanical, and electronic properties, thereby enabling novel optoelectronic functionalities delivered in the form factor of an extended fiber. This new class of fibers developed over the past two decades is attracting interest from researchers in such different fields as optics, textiles, and biomedicine. The juxtaposition of multiple materials integrated at micro- and nanoscales in complex geometries while ensuring intimate smooth interfaces extending continuously for kilometers facilitates unique applications such as non-invasive laser surgery, self-monitoring fibers, e-textiles, and …

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Assessing The Effects Of Habitat And Manatee Exclusion Devices On Red Drum (Sciaenops Ocellatus) Movement Patterns In Estuarine Impoundments, Steven Baker Jan 2019

Assessing The Effects Of Habitat And Manatee Exclusion Devices On Red Drum (Sciaenops Ocellatus) Movement Patterns In Estuarine Impoundments, Steven Baker

Electronic Theses and Dissertations

The Integrate-Transfer-Launch (ITL) complex impoundments located within the Kennedy Space Center security zone are known spawning sites for red drum (Sciaenops ocellatus). However, recent construction of manatee exclusion bollards around culverts leading into these impoundments may impede movement to and from this critical habitat. The goals of this study were to: 1) utilize passive acoustic telemetry to document patterns of red drum movement and habitat use within and around the ITL impoundments to assess how manatee exclusion bollards and environmental conditions may impact movement of red drum; and 2) explore red drum movement in response to environmental disturbance, specifically a …

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Stable, Highly Luminescent Perovskite-Polymer Composites For Photonics Applications, Juan He Jan 2019

Stable, Highly Luminescent Perovskite-Polymer Composites For Photonics Applications, Juan He

Electronic Theses and Dissertations

Metal halide perovskites (simplified as perovskites as below), particularly those in nanocrystal forms, have recently emerged as highly efficient, bandgap tunable photonics materials that can be easily solution processed at low cost for display, lighting or other energy conversion applications. However, the quick degradation of perovskite nanocrystals under external stresses or upon colloidal aggregations has been a major challenge for most applications where high reliability is normally required. In this thesis, we have explored a polymer swelling-deswelling microencapsulation (SDM) process that enables the dispersion, in-situ crystallization and subsequent surface passivation of perovskite nanocrystals in polymer matrices, and leads to ultrastable …

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Computational Imaging With Limited Photon Budget, Zheyuan Zhu Jan 2019

Computational Imaging With Limited Photon Budget, Zheyuan Zhu

Electronic Theses and Dissertations

The capability of retrieving the image/signal of interest from extremely low photon flux is attractive in scientific, industrial, and medical imaging applications. Conventional imaging modalities and reconstruction algorithms rely on hundreds to thousands of photons per pixel (or per measurement) to ensure enough signal-to-noise (SNR) ratio for extracting the image/signal of interest. Unfortunately, the potential of radiation or photon damage prohibits high SNR measurements in dose-sensitive diagnosis scenarios. In addition, imaging systems utilizing inherently weak signals as contrast mechanism, such as X-ray scattering-based tomography, or attosecond pulse retrieval from the streaking trace, entail prolonged integration time to acquire hundreds of …

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Optical Sensing Of Structural Dynamics In Complex Media, Jose Rafael Guzman Sepulveda Jan 2019

Optical Sensing Of Structural Dynamics In Complex Media, Jose Rafael Guzman Sepulveda

Electronic Theses and Dissertations

Quantifying the structural dynamics of complex media is challenging because of the multiple temporal and spatial scales involved. Thanks to the ability to retrieve collective dynamics noninvasively, light scattering-based approaches are often the methods of choice. This dissertation discusses specific features of dynamic light scattering that utilizes spatio-temporal coherence gating. It is demonstrated that this optical fiber-based approach can operate over a large range of optical regimes and it has a number of unique capabilities such as an effective isolation of single scattering, a large sensitivity, and a high collection efficiency. Moreover, the approach also provides means for proper ensemble …

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Synthesis And Bioevaluation Of Methionine Depletion Agents, Houssine Ikhlef Jan 2019

Synthesis And Bioevaluation Of Methionine Depletion Agents, Houssine Ikhlef

Electronic Theses and Dissertations

The native polyamines (putrescine, spermidine, and spermine) are low molecular weight amines that exist as polycations at physiological pH. These polycations interact with DNA, RNA, and influence many cellular processes. Intracellular polyamine levels are maintained via a balance of polyamine biosynthesis, catabolism, and transport. Ornithine, an amino acid obtained from L-arginine, is decarboxylated by ornithine decarboxylase (ODC) to form putrescine. The biosynthesis of the higher polyamines, spermidine and spermine, requires the addition of an amino-propyl group donated by decarboxylated S-adenosylmethionine (dc-SAM), which itself is derived from the amino acid L-methionine (Met). Tumor cells are heavily reliant on methionine because it …

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Tumor-Targeted Conjugated Polymer Nanoparticles With Encapsulated Iron And Its Biomedical Application For In Vitro Killing Of Melanoma Cell Lines Through Ferroptosis Assisted Chemodynamic Therapy (Cdt), Khalaf Jasim Jan 2019

Tumor-Targeted Conjugated Polymer Nanoparticles With Encapsulated Iron And Its Biomedical Application For In Vitro Killing Of Melanoma Cell Lines Through Ferroptosis Assisted Chemodynamic Therapy (Cdt), Khalaf Jasim

Electronic Theses and Dissertations

Melanoma represents one of the most aggressive and lethal forms of skin cancer, with annually rising incidences throughout the world. Although chemotherapy modalities remain the mainstay of treatment, the therapeutic potential of chemotherapy typically is hampered by multidrug resistance (MDR) and nonspecific drug distribution that causes side-effects. To surmount such limitations, novel nanoformulations of low band-gap poly ({4,8-bis [(2-ethylhexyl) oxy] benzo [1,2-b:4,5-b?] dithiophene-2,6-diyl}{3-fluoro-2-[(2-ethylhexyl) carbonyl] thieno [3,4-b] thiophenediyl}) (PTB7) and poly [2,1,3-benzothiadiazole- 4,7- diyl [4,4-bis (2-ethylhexyl)- 4H-cyclopenta [2,1-b:3,4-b'] dithiophene-2,6-diyl]] (PCPDTBT) were fabricated by a reprecipitation method. These conjugated polymer nanoparticles were functionalized with the polypeptide endothelin-3 (EDN3-CPNPs) to target melanoma. The …

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Lifetime History Of Concussions And Behavioral Measures Of Anhedonia, John O'Donnell Jan 2019

Lifetime History Of Concussions And Behavioral Measures Of Anhedonia, John O'Donnell

Electronic Theses and Dissertations

Concussions are the most common neuropsychological problem in the United States and are associated with sequelae such as cognitive complaints and depression-related symptoms. Recent research suggests that head trauma is associated with anhedonia and that concussions have the potential to damage axons and postsynaptic connections in neural circuits that play a role in reward processing. Anhedonia may be better understood as an overarching construct with multiple subtypes including motivational, decisional, and consummatory. The current study examines the relationship between lifetime concussion history and subtypes of anhedonia using behavioral measures of reward processing: the Effort Expenditure for Rewards Task (EEfRT), Probabilistic …

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