Here we examine seasonal grain-size trends on 18 beaches in the Northeastern US and dispersed along the post-glacial coast of Massachusetts (USA) in order to explore the mechanisms influencing median grain size and slope. Over 800 grain size samples were collected along 200 summer and winter cross-shore beach elevation surveys. Obtained grain size and beach slope data are compared to coastal morphology, sediment source, wave height, and tidal magnitude in order to ascertain controls on beach characteristics. In general, median grain size increases with intertidal beach slope in the study region. However, grain sizes along post-glaciated beaches in the study are as much as an order of magnitude coarser for the same beach slopes when compared to beaches for other regions of the US. Grain size and slope for beaches in the northeastern US also exhibit less correlation with oceanographic processes (i.e. wave climate and tidal magnitude). Instead, grain size trends are primarily driven by the composition of nearby glacial deposits that serve as the primary source of sediment to beaches in the study region. Results provide quantitative support for the distribution and composition of legacy glacial deposits rather than oceanographic conditions serving as the predominant governor of beach grain size along post-glaciated coastlines of the Atlantic continental margin.

The purpose of this study was to evaluate the effectiveness of video monitoring devices (VMDs) in reducing incidents of student misbehavior on middle school buses. It was hypothesized that the presence of VMDs would decrease the frequency of behavioral problems encountered by school bus drivers, decrease the number of discipline referrals issued by the drivers, and improve the drivers’ perception of student behavior. The study utilized an experimental design with random assignment of drivers to treatment and control groups. These groups were formed from a population of 282 drivers who serve ten middle schools for Virginia Beach City Public Schools. In the summer of 1993, through a randomization procedure, VMDs were installed on 100 school buses to form the treatment group. The remaining 182 school buses did not receive installation and were designated as the control group. All drivers maintained a daily log of the number of discipline problems encountered on their routes for three 15-day intervals. Statistical analysis revealed a significantly lower number of problems in the treatment group. Secondary analysis indicated that the use of VMDs was ineffective on morning routes but effective on afternoon routes. Also, there was a significantly lower number of discipline problems in the treatment group regardless of the day of the week. As the drivers established rapport and control, both groups experienced a decline in the number of discipline problems throughout the experiment. The treatment group, however, recorded a significantly lower number of problems during each of the three 15-day intervals. This indicates that the students did not become desensitized to the presence of the VMD’s over the five-month experiment. At the conclusion of the study, drivers in the treatment group rated the behavior of their students more highly than the rating of students by drivers in the control group. A tally of the number of discipline referrals issued by the drivers revealed that the members of the treatment group experienced fewer severe disciplinary problems. Finally, multiple regression indicated that of all independent variables, group membership is the best predictor of a number of behavioral problems, discipline referrals issued, and driver perception of student behavior. / Ed. D.

Includes bibliographical references (leaves 136-154) / xvii, 171 leaves ; ill. (some col.), maps ; 30 cm. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / Aims to determine the effects of an outfall discharging secondarily treated wastewater effluent on benthic communities at Christies Beach with the specific objectives of: characterising the physical, biological and chemical environment of Gulf St Vincent and the study area region; ascertaining the extent to which effluent outfall has affected the macrobenthic infaunal community structure; characterising the structure of macrobenthic infaunal communities in the near shore water of the Adelaide metropolitan coast; and, determining the functional response through measurements of sediment community respiration to these changes. / Thesis (Ph.D.)--University of Adelaide, Dept. of Environmental Biology, 2001

Good public relations as a necessary element. By good public relations for schools we mean that the school should carry on its work well and keep the whole community informed on how well it is doing. Since the total program of the school should be a sound one for acceptance by the public, each worker in the school is immediately involved. Not only administrators and principals but teachers, pupils and custodians must be well informed on what the school is trying to accomplish and how it is doing so. All participate in helping to inform the public. Newspaper coverage of Palm Beach High School by The Palm Beach Post, The Palm Beach Times, and The Palm Beach Post-Times Sunday paper, Aug. 18, 1952-June 12, 1953. / "A Paper." / Typescript. / "Submitted to the Graduate Council of Florida State University in partial fulfillment of the requirements for the degree of Master of Arts." / Advisor: Herman F. Frick, Professor Directing Paper. / Includes bibliographical references.

Issues of sexual assault have become pervasive across all social strata in American society. Citizens need to start having conversations regarding these issues. To combat the issue of sexual assault, children need to be educated regarding the multifaceted aspects of sex through sex education in order to understand consent and resources they have available to them. Utilizing grounded theory methodology, this thesis analyzes sex education literature provided to Palm Beach County Middle School students. Using Burke’s theory of terministic screens and Foucauldian theories of power and control; an understanding of the ideological underpinnings of this literature and discourse were acquired. After analysis, suggestions for disclosure and sex education programs are provided. / Includes bibliography. / Thesis (M.A.)--Florida Atlantic University, 2017. / FAU Electronic Theses and Dissertations Collection

Ces travaux de thèse concernent la morpho-dynamique d'une plage de poche sableuse, située en environnement macrotidal. L'étude est menée sur la plage de Porsmilin, une plage de type intermédiaire avec une terrasse de basse mer. Cette étude s’appuie sur des observations in situ acquises lors de campagnes de mesures, organisées au cours de cette thèse. Le principal objectif est de caractériser le rôle de la pente, dans l'équilibre dynamique existant entre les processus hydrodynamiques et la morphologie de la plage. La dynamique des niveaux d’eau, de la propagation des ondes infragravitaires et de la turbulence sont examinés et mis en regard des variations morphologiques de la plage, en particulier de la pente locale de la plage. Les niveaux d’eau sont globalement sous-estimés par les formulations empiriques proposées dans la littérature. Des formules adaptées au site de Porsmilin sont présentées. L’impact de la brisure de pente observée le long du profil de plage sur la dynamique de la plage, est étudié. La variabilité de la position de la brisure de pente est impliquée dans les processus d’accommodation à court terme de la plage. Cela se traduit par un retrait vers le haut de plage de la brisure de pente, permettant une dissipation plus efficace de l’énergie incidente par la terrasse de basse mer. En revanche, ce retrait peut conduire, à une concentration d’énergie importante en haut de plage, lors de conditions particulièrement énergétiques, associées à un marnage important. La position de la brisure de pente pourrait être un bon indicateur de l'état de vulnérabilité de la plage face à des évènements énergétiques, ce qui constitue une information primordiale dans le contexte actuel d’érosion généralisée des littoraux sableux. / This PhD work is focused on the morphodynamic of a pocket beach, located in a macrotidal environment. The beach type is intermediate, with a low tide terrace. The study is based on in situ observations, collected during field campaigns organized during the PhD. The objective is to characterize the beach slope impact on hydrodynamics processes and beach morphology. The water levels dynamic, infragravity waves propagation and turbulence generation in the swash zone, are examined and linked to the beach slope variability.The empirical formulations proposed in the literature show large under-estimations of water levels in the site. Empirical formulations adapted to the beach are proposed.The characteristic break slope presents along the cross-shore profile of low tide terrace beaches is studied. The variability of the break slope location is relevant to explain the short term accommodation of the beach. Under incident wave energy, the location of the beach slope moves shoreward, allowing higher wave dissipation by the low tide terrace. Nevertheless, the reflective part is reduced, which leads to a vulnerable state of the upper beach under strong forcing associated with high tide. The location of the beach slope is found to be a good indicator of the beach vulnerability under a given wave forcing. It provides valuable information in the globalized beach erosion context.

Birth across borders: a comparative study of Guatemalan Maya maternal care in San Miguel Acatán and Palm Beach County / Includes bibliography. / Dissertation (Ph.D.)--Florida Atlantic University, 2015. / FAU Electronic Theses and Dissertations Collection

Cross-shore bathymetric evolution in the nearshore zone often leads to threatening consequences such as beach erosion and shoreline retreat that concern the coastal community. A new, comprehensive cross-shore morphodynamic model was developed that can be used to describe and predict these phenomena. The study included both physical and numerical models that were designed to focus on the influence of sediment size characteristics on the cross-shore sediment transport process. For a profile equilibrium timescale, three types of beach profiles with different sediment mixtures were simulated in a small-scale, random-wave flume laboratory using erosive, storm, and accretive wave conditions. Dynamic relationships between the sediment grain sorting and beach profile changes were found to be evident as size-graded sediment fractions tended to relocate to different energetic zones along the cross-shore profiles. Existing phase-averaged wave and circulation models were utilized together with several new intra-wave modules for predicting important hydrodynamic parameters that were validated using the experimental data. A novel, multi-size sediment transport model was formulated to compute individual transport rates of size-graded sediment fractions while accounting for their interaction and non-linear size dependencies. The model was coupled with a new grain sorting model that resolves cross-shore grain sorting and vertical grain lamination. Compared to a traditional modeling approach, the new comprehensive model proved to offer superior modeling accuracy for both profile evolution and sediment grain size change. The use of the model is most advantageous for a condition with intensive grain sorting, a common scenario on a natural beach profile. Equilibrium beach profile is also better simulated by the model as size-graded fractions are predicted to relocate to different zones where they could withstand local hydrodynamics. Other new components that also help improve the modeling capability include the terms for wave-breaking and bed-slope effects, wave-crest sediment flux, and acceleration-induced bottom-shear stress. Besides superior profile modeling accuracy, sediment size characteristics and their spatial and temporal variations are also a useful set of information provided by the new model.

En la Tesis titulada "Análisis y mejoras en la evaluación de diversos términos de los modelos de evolución de playas en escalas de medio plazo" se desarrolla un modelo de evolución de playas de medio-largo plazo y se aplica a zonas de refracción-difracción. La Tesis se divide en tres secciones principales:SECCIÓN 2. Fundamentos y desarrollo del modelo de evolución de medio-largo plazoSe desarrolla y valida con datos de campo el modelo de evolución de playas de medio-largo plazo.SECCIÓN 3. Oleaje en rotura en zonas de refracción-difracción en los modelos de evolución de playasSe propone y valida un método para la determinación de las características del oleaje en rotura en zonas de refracción-difracción.SECCIÓN 4. Perfil de equilibrio en zonas de refracción-difracciónSe deriva una expresión analítica para definir el perfil de equilibrio en zonas de refracción-difracción y se calibra con datos de campo. / In this Thesis entitled "Analysis and improvements in the evaluation of several terms of medium-term beach evolution models" a medium-long term beach evolution model is developed and applied in refraction-diffraction areas. The Thesis is composed of the following main sections:SECTION 2. Fundaments and development of a medium-long term beach evolution modelIn this section a medium-long term beach evolution model is developed and validated based on field data.SECTION 3. Breaking wave characteristics in refraction-diffraction areas for beach evolution modelsIn this section a method to determine the breaking wave characteristics in refraction-diffraction areas is proposed and validated.SECTION 4. Equilibrium beach profile for refraction-diffraction areasIn this section an analytical expression to calculate the equilibrium beach profile for refraction-diffraction areas is derived, being calibrated based on field data.

No description available.