1,498 research outputs found
Rapid increases in the proton and electron fluxes in the magnetosphere
Time histories of intensities and spectra for low energy electrons and protons in magnetospher
Examining Tufte’s Political Business Cycle under an Adaptive Expectations Framework
Given that the executive branch’s party desires reelection and that the economy is an important variable in the eyes of the electorate, to what extent has the president and his party been able to exert influence over economic variables in the months preceding an election? Much of the existing literature suggests that there may be an important cyclical pattern between the four-year election cycle and economic variables such as real GDP growth and real disposable income. Using data from the Council of Economic Advisors and the Presidential Elections dataset, this paper finds moderate evidence for the existence of a political business cycle as it applies to GDP growth rates and real disposable income. Subsequent analysis reveals that during elections with significantly high and low GDP growth rates, election results can be perfectly predicted based on the theoretical model
Examining Tufte\u27s Political Business Cycle under an Adaptive Expectations Framework
Given that the executive branch\u27s party desires reelection and that the economy is an important variable in the eyes of the electorate, to what extent has the president and his party been able to exert influence over economic variables in the months preceding an election? Much of the existing literature suggests that there may be an important cyclical pattern between the four-year election cycle and economic variables such as real GDP growth and real disposable income. Using data from the Council of Economic Advisors and the Presidential Elections dataset, this paper finds moderate evidence for the existence of a political business cycle as it applies to GDP growth rates and real disposable income. Subsequent analysis reveals that during elections with significantly high and low GDP growth rates, election results can be perfectly predicted based on the theoretical model
Justifying a New Beginning: The Case of An Urban, Jewish Congregation in the 1970s
This research applies C. Wright Mills’ theory of vocabularies of motive to reveal the collective narratives, which were used to justify the atypical founding of an urban Jewish congregation in the 1970s. Prior to and during this period, US Jewish communities were migrating out of city centers into their surrounding suburbs. Most Jewish congregations followed their congregants and moved into the suburbs. This study identifies the collective justifications within the Hatchala Chadasha community, which are the accepted reasons for the organization’s atypical urban location and organizational structure. The findings of this research are based in the examination of interviews with individuals who were community members during the earliest years of Hatchala Chadasha’s existence. Patterns of similar accounts across the interviews revealed the collective narratives that defended four of the congregation’s fundamental decisions: why the congregation was founded, where the congregation chose to locate, how the congregation acted politically, and what organizational structure the congregation employed. These justifications are further examined, in relation to the behavior and values common within the broader Jewish community and other contextual components, to theorize why certain accounts became the accepted narrative within Hatchala Chadasha. Fundamentally, this research examines informants’ motive statements to discern and analyze the collective narratives formed in a community, which justify the community’s atypical behavior in the context of a predominant, external culture
School Vouchers: Does Increased Competition Benefit the Masses?
The following review attempts to organize and consolidate these competing schools of thought [about school voucher programs]. In the next section, I will summarize the different policies implemented by state and national institutions, as well as their varying degrees of effectiveness. Later sections will discuss public school inefficiencies and nonmarket interactions such as the peer effect. A concluding section summarizes the policy implications of the review and discusses potential directions for future research
Classically Formal, Biotic Subjectivity: Moderating Plastic\u27s Relation to the Viewer
Due to its cheap, pervasive, and disposable nature, post-consumer plastic has no subjectivity in its relation to the consumer. My thesis project examines the material’s inherent destructive narrative and question its ability to have extrinsic value beyond the assumptions of trash. In my research, I found that humans instinctually seek to conserve and treat biotic material with care. This fact has become a catalyst for the works in this project, which aim to not only increase the material’s value through animate biomorphic transformation, but also counter our disposable tendencies.
At the onset of this project, I was fixated solely on the physical potential of plastic, but in researching cultural narratives, I became more aware of the social significance that post-disposal plastic material holds. Artistic works by Mark Bradford and El Anatsui helped me understand the potential for re-inscribing new meaning into materials that have had a prior existence, and the art of Lynda Benglis and Tim Hawkinson inspired my technical application. From there, I applied the aesthetics of biomorphism, which resulted in a culminating piece that utilizes melted and deformed bubble wrap to evoke reptilian skin or a micro-biotic cell community
Occurrence and transformation of veterinary pharmaceuticals and biocides in manure: a literature review
The spread of veterinary medicinal products (VMPs) and biocides via manure onto agriculturally used areas represents a very important emission into the environment for these product groups. Within this literature study, publicly available transformation studies with liquid manure are summarized. Transformation studies were evaluated regarding the transformation fate of tested substances, the origin and characteristics of used manure, the experimental setup, and the measured parameters. As main topics within the 42 evaluated transformation studies, the high dependency of transformation on temperature, redox potential, dry matter content, and other parameters is reported. Test duration throughout the studies ranged from 2 to 374 days and study temperature ranged from 5 to 55 °C. Only seven publications gave information on the redox potential of the manure. Further, the characterization of the matrix in many cases was inadequate due to missing parameters such as dry matter content or pH. Only three publications studied transformation of biocides. To allow for a consistent assessment of studies within the registration process, a harmonized internationally accepted and validated test method is needed. Additionally, monitoring data of VMPs in manure were collected from literature and evaluated regarding the origin and characteristics of the manure, the minimum/maximum found concentrations, and the percentage of identified compounds. Within the 27 evaluated publications, 1568 manure samples were analyzed and 39 different active substances for VMPs and 11 metabolites and transformation products of VMPs could be found in manure. Most often, the samples were analyzed for sulfonamides, tetracyclines, and fluoroquinolones. Not one study searched for biocides or worked with a non-target approach. For sulfadiazine and chlortetracycline, concentrations exceeding the predicted environmental concentrations were found
Nonfouling Surface Coatings Based on Poly(2-methyl-2-oxazoline)
Surface fouling, i.e. the non-specific surface adhesion of proteins, bacteria and higher organisms, poses a severe problem in many areas ranging from modern diagnostic and therapeutic medical devices to food processing and food wrapping technology to corrosion prevention and
marine technology. One approach to address these problems is to coat surfaces with nonfouling polymers. The properties of a new class of nonfouling polymer coatings made from poly(2-methyl-2-oxazoline) (PMOXA) were investigated here in comparison with the most frequently used polymer in this
context, poly(ethylene glycol) (PEG). Both polymers were side-chain grafted onto a polycationic poly-L-lysine (PLL) backbone. The PMOXA graft copolymers spontaneously self-assembled to form monolayers on negatively charged surfaces. PMOXA surface coatings were as efficient as PEG-based coatings
in suppressing protein and bacterial adsorption. The minimal number of side chain monomer units per surface area that are needed to obtain fully resistant surfaces was lower though for PMOXA than for PEG graft copolymers as a result of the higher molecular weight of the PMOXA monomer unit
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