991 research outputs found
The Utilization of EXONEST in Characterizing Kepler Objects
With the first detection of an exoplanet, came the study of methods to detect and characterize additional planets. Multiple methods for finding exoplanets were developed, including transit methods. When a star’s flux is being observed for an extended period of time and a slight dip in the relative flux is seen periodically, this may be evidence of a planet passing in front of the star and blocking out a portion of the received flux. It is this method that is employed by the Kepler spacecraft. Kepler observes approximately 100,000 stars looking for periodic decreases in stellar fluxes. From the produced light curves, it is possible to determine characteristics of a detected planet. From these light curves, paired with different photometric properties inherent in planetary systems, much in the way of the system’s nature (such as physical parameters of the planet and star and properties relating to the orbit of the planet) can be gleaned. Using the Bayesian nested sampling algorithm EXONEST, three planetary candidates observed by Kepler were studied and their characteristics determined. Due to the Bayesian nature of EXONEST, the probability of different photometric properties being present in a planetary system could be determined and compared
Literacy and Democracy: Does a Causal Connection Exist?
This paper attempts to determine if a causal connection exists between majority literacy and the formation of a democracy in a particular polity. After defining terms, I discuss the logic of testing necessary and sufficient conditions. Case studies of two ancient polities (Athens and Syracuse) and two modern polities (India and Russia) are undertaken to determine whether majority literacy is a necessary and/or sufficient condition for democracy. I conclude that claims regarding the causal efficacy of literacy on democracy have been exaggerated
An Investigation Of Seriation And Perception In The Structure And Function Of Intellect In The Educable Mentally Retarded
This study is relevant to the potential utility of a developmental approach to the assessment of ability in students designated “Edicable Mentally Retarded”. Piaget’s conceptualization of seriation as an essential component of logical thinking, related to perception, suggested a linkage between dimensions of thinking and imagery, generally treated independently
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Investigations of the C8S3 J-aggregate
textThis research project entails analyses of both alcoholic route C8S3 J-aggregate bundles and the interactions of a polyethylene glycol additive with alcoholic route C8S3 J-aggregates. First, the C8S3 J-aggregate bundles are characterized by both polarized and non-polarized spectroscopy methods. Orientation of the tubular bundled molecular complex was achieved, depending on the experiment, through a combination of flow cell experiments and cover slip deposited sample analysis. Next, isolated alcoholic route C8S3 J-aggregates were investigated using a polyethylene glycol (PEG) additive which has been shown, through absorbance and fluorescence emission spectroscopy, to selectively and reversibly remove the outer wall of the J-aggregate tubule. Spectroscopic analyses have indicated that the addition of a PEG additive left behind an in-tact inner wall tubule without the use of oxidizing agents, a feat never before accomplished with the C8S3 monomer.Chemistr
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