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Full-Text Articles in Physical Sciences and Mathematics
An Optical Scalar Approach To Weak Gravitation Lensing, Louis Bianchini
An Optical Scalar Approach To Weak Gravitation Lensing, Louis Bianchini
Undergraduate Review
We assume a thick gravitational lens governed by a Baltz n=1 matter density model. From the gravitational potential we then derive expressions for a Weyl tensor component and Ricci tensor component. A perturbative approach is taken to solve for the convergence and shear as given by Sach’s equation. By applying the geodesic deviation equation to a bundle of light rays with our expressions for the optical scalars we are able to derive expressions for the image shape and size at any point along the path from source to observer, in the case of an axially symmetric lens and source.
Pioneering The Personal Robotics Industry, Russell Nickerson
Pioneering The Personal Robotics Industry, Russell Nickerson
Undergraduate Review
The up and coming industry that I will be reporting about here is the personal and home robotics industry. I will show how the development cycle in the United States functions. I will then answer the question: What are the main limits that hold back this industry? The U.S. approach to robotics will be contrasted with Japan’s approach as Japan has another very well developed robotics program.
Modeling Weak Gravitational Lensing Through C++, Christopher Cepero
Modeling Weak Gravitational Lensing Through C++, Christopher Cepero
Undergraduate Review
Gravitational Lensing has become an integral part of astrophysics and the study of matter in the universe. In weak gravitational lensing, an object appears distorted when viewed from the observer’s perspective. This is caused by the bundle of light being distorted by an object of considerable mass. Because the distance to each part of this bundle is not the same, the rays of light are affected differently causing a shearing and magnification of the image. This alteration in the image we see can be modeled using the thin lens approximation. By integrating the equations for light travel based on general …
Life History Parameters Of The Humpback Whale (Megaptera Novaengliae) In The Waters Of The Gulf Of Maine For The 2007 Feeding Season, Meghan Wert
Undergraduate Review
The humpback whale (Megaptera novaengliae) is an endangered species of baleen whale that feeds in the waters of the Gulf of Maine during the spring, summer and fall. The worldwide population of humpback whales ranges from 60,000 to 80,000 individuals and the population within the Gulf of Maine is estimated between 9,000 to 11,000. Humpback whales are a large baleen whale that reaches an average length of 40 to 50 feet and a weight of 35 to 40 tons. Although protected worldwide since the International Whaling Commission in 1964, this population has increased slowly and is still considered …
Singing The Moly Blues: The Direct Use Of Molybdenum Clusters As A Precursor To The Development Of Molybdenum Blue Glazes, Margaret Fiedler
Singing The Moly Blues: The Direct Use Of Molybdenum Clusters As A Precursor To The Development Of Molybdenum Blue Glazes, Margaret Fiedler
Undergraduate Review
Cobalt is currently the most commonly used blue colorant for ceramic glazes, however due to its toxicity in powder form there is a need for an alternative. Molybdenum, more specifically molybdenum oxide, is one alternative that has shown promise. This research is aimed at the direct incorporation of reduced molybdenum clusters into the glaze matrix. Two compounds have been synthesized that exhibit an intense blue color, Na15[MoVI126MoV28O457H14(H2O)70]0.5-[MoVI124MoV28O427H14(H2O)68]0.5 …
Solar And Topographical Breeding Habitat Preferences Of Two Damselflies Calopteryx Aequabilis And Calopteryx Maculata, Christopher St. Andre
Solar And Topographical Breeding Habitat Preferences Of Two Damselflies Calopteryx Aequabilis And Calopteryx Maculata, Christopher St. Andre
Undergraduate Review
As the global climate changes many species are forced to adapt, but if the climate changes beyond their tolerance levels they can face extinction1. Scientists need to work fast in order to mitigate these extinctions. Using field observations of species’ habitats coupled with the use of geographic information systems (GIS), researchers can model the locations of ideal habitats. Using these models, scientists can work to improve conservation efforts by raising the populations of dwindling species or predicting locations to place new subpopulations. Data used in GIS are spatially explicit, so stored within individual data sets and information systems are locational …
Effects Of Land Cover Variability On Evapotranspiration In The Llanganuco Valley, Aimee Higgins
Effects Of Land Cover Variability On Evapotranspiration In The Llanganuco Valley, Aimee Higgins
Undergraduate Review
A process-based understanding of the effect land cover has on evapotranspiration (ET) in alpine valleys is lacking. It is conventionally assumed that ET is a negligible part of the water cycle in the Peruvian Andes, a critical source of water for the local inhabitants, due to lack of precipitation during the 6-month dry season and high humidity during the 6-month wet season. However, recent research findings from an embedded sensor network indicate that ET is in fact an important part of the Andean water cycle in Peru. Water resources within Peru are affected by the glaciers within the Cordillera Blanca, …