Responsiveness, Representation, and Democracy: A Critical Conceptual Analysis and its Implications for Political Science

Over forty years ago, Hanna Pitkin expressed concern that social scientists were failing to give concepts the attention which they needed (Pitkin 1972, 277). This thesis takes up the same theme, asking how the concept of responsiveness is treated by political scientists. The goal to reveal confusion that surrounds widely used concepts such as responsiveness. The analysis offered in this thesis has significance for the discipline of political science in three ways. First, it highlights confusion surrounding the concept of responsiveness itself. Responsiveness is a widely utilized concept employed throughout the social sciences; however, as this thesis shows, there is wide disagreement in how the concept is understood. This confusion is fueled by the frequent failure of scholars to critically analyze the concept and the assumptions which have been attached to the understanding of responsiveness. Second, by analyzing the related concepts of representation and democracy, this thesis suggests that there is a lack of attention to concepts which are employed for research that extends beyond responsiveness. Many other concepts that are foundational to our discipline warrant increased scrutiny. Third and finally, the thesis highlights the danger of ignoring the ideological commitments of political scientists, commitments that can shape in hidden but consequential ways how we study the world around us

Imaging of Alignment, Deformation and Dissociation of CS2 Molecules using Ultrafast Electron Diffraction

Imaging the structure of molecules in transient excited states remains a challenge due to the extreme requirements for spatial and temporal resolution. Ultrafast electron diffraction from aligned molecules (UEDAM) provides atomic resolution and allows for the retrieval of structural information without the need to rely on theoretical models. Here we use UEDAM and femtosecond laser mass spectrometry (FLMS) to investigate the dynamics in carbon disulfide (CS2) following the interaction with an intense femtosecond laser pulse. We have retrieved images of ground state and excited molecules with 0.03 {\AA} precision. We have observed that the degree of alignment reaches an upper limit at laser intensities below the ionization threshold, and found evidence of structural deformation, dissociation, and ionization at higher laser intensities

Investigating the Effects of Endurance Training on Heart Rate Variability in Female Swimmer Athletes

It is important for elite endurance athletes to have practical and reliable means of measuring fatigue throughout their training. Variations in Autonomic Nervous System activity (ANS) may provide an effective marker of fatigue and of recovery. ANS control of heart rate is well known to be affected by exercise training, and those adaptations can be determined using measures of heart rate variability (HRV). Previous research has examined the effect of training on HRV and ANS control of heart rate in males, there is a lack of any comprehensive studies that address adaptations in female athletes. Therefore, the purpose of this study was to investigate the changes in HRV and ANS fluctuations in female swimmer athletes throughout an entire collegiate swim season. 9 Division I female swimmers (Age: 20.6±1.01) were used to determine HRV at three different points in their competitive training: pre-season, mid-season, and post-season. During each testing session, HRV was measured both at rest and during a maximal 400 yd freestyle swim. Heart rate values were determined using Polar™ heart rate monitors, and the HRV analyses was conducted using Kubios 2.0 HRV analysis software. Global ANS balance was shown to significantly shift towards Sympathetic (SNS) predominance during the mid-season testing and significantly shift towards parasympathetic (PNS) predominance during post-season testing. HRV analysis appears to be an appropriate tool to monitor the effects of physical training loads on performance and fitness in female athletes, and it can be used to help identify and prevent overtraining states

AN OVERVIEW OF THE PHYSICAL AND NON-PHYSICAL HEALTH EFFECTS OF MARATHON RUNNING

The purpose of this study is to summarize the current scientific literature and knowledge on the physical and non-physical health effects of marathon running. Five databases were queried, using the keywords marathon, endurance, training, wellness, injury, distance, runner, running, health, benefit, respiratory, infection, immunity, and/or risk in various combinations. Articles eligible for inclusion analyzed the effects of long-distance running (13.1 miles or greater), and were published in peer-reviewed English language journals after 1976. Of the 71 articles which meet the inclusion criteria, several discussed more than one aspect of marathon running; 26 discussed physical benefits, 11 discussed non-physical benefits, 40 discussed physical risks, and 4 discussed non-physical risks. The physical health benefits of exercise are well known, however, many questions remain about the health risks and implications across the spectrum of wellness. These questions must be answered before the effects, benefits, and risks of long-distance running can be understood, and scientifically validated recommendations published

The Housing Price Bubble In A Suburban Georgia Setting: Using The Hedonic Pricing Model In The New South

This study applies a hedonic pricing model to the rapidly developing suburban housing market adjacent to the Savannah Historic Landmark District in the downtown area of Savannah, Georgia. Using OLS estimation, the hedonic pricing model yields results clearly tracing out the magnitude of the time-related housing price premium in the suburban market analyzed for the years from 2005 to 2010. The results also control for internal and external housing characteristics that are capitalized into the real sales prices of the housing transactions analyzed

The long reach of sponsorship: How fan isolation and identification jointly shape sponsorship performance

© American Marketing Association 2018. Globalization and technology have expanded the reach of sports teams, giving brand sponsors new opportunities to engage and build relationships in real time with fans outside a team’s home market. This research investigates the role of fan isolation, or the experience of feeling separated from the team community, in shaping sponsorship effectiveness. The authors posit that such isolation increases the desire to affiliate with the team community, which can increase preferences for team-linked brands. However, the effect of isolation on sponsor performance depends on the strength of fan identification. Isolation increases strong fans’ desire to affiliate with the team community, thereby enhancing sponsorship performance; by contrast, isolation causes weak fans to avoid team-linked brands. Two field studies and four quasi experiments conducted across three countries (N = 1,412) confirm these predictions. Isolated strong fans exhibit increased recall, attitudes, purchase intentions, and word of mouth for sponsors, while isolated weak fans display the opposite effects. For brand managers, the proposed framework reveals whether isolated fans provide the best or worst returns on their sponsorships

Synchrotron Radiation From Radiatively Inefficient Accretion Flow Simulations: Applications to Sgr A*

We calculate synchrotron radiation in three-dimensional pseudo-Newtonian magnetohydrodynamic simulations of radiatively inefficient accretion flows. We show that the emission is highly variable at optically thin frequencies, with order of magnitude variability on time-scales as short as the orbital period near the last stable orbit; this emission is linearly polarized at the 20-50 % level due to the coherent toroidal magnetic field in the flow. At optically thick frequencies, both the variability amplitude and polarization fraction decrease significantly with decreasing photon frequency. We argue that these results are broadly consistent with the observed properties of Sgr A* at the Galactic Center, including the rapid infrared flaring.Comment: Accepted for publication in Ap

Imaging of alignment and structural changes of carbon disulfide molecules using ultrafast electron diffraction

Imaging the structure of molecules in transient-excited states remains a challenge due to the extreme requirements for spatial and temporal resolution. Ultrafast electron diffraction from aligned molecules provides atomic resolution and allows for the retrieval of structural information without the need to rely on theoretical models. Here we use ultrafast electron diffraction from aligned molecules and femtosecond laser mass spectrometry to investigate the dynamics in carbon disulfide following the interaction with an intense femtosecond laser pulse. We observe that the degree of alignment reaches an upper limit at laser intensities below the ionization threshold, and find evidence of structural deformation, dissociation and ionization at higher laser intensities

Two-color multiphoton emission from nanotips

Two-color multiphoton emission from polycrystalline tungsten nanotips has been demonstrated using two-color laser fields. The two-color photoemission is assisted by a three-photon multicolor quantum channel, which leads to a twofold increase in quantum efficiency. Weak-field control of twocolor multiphoton emission was achieved by changing the efficiency of the quantum channel with pulse delay. The result of this study complements two-color tunneling photoemission in strong fields, and has potential applications for nanowire-based photonic devices. Moreover, the demonstrated two-color multiphoton emission may be important for realizing ultrafast spin-polarized electron sources via optically injected spin current