Span, chainability and the continua H* and I_u

We show that the continua I_u and H* are non-chainable and have span nonzero. Under CH this can be strengthened to surjective symmetric span nonzero. We discuss the logical consequences of this.Comment: 2004-03-11: corrected some typos, some parts rewritte

The use of Skylab data to study the early detection of insect infestations and density and distribution of host plants

The detection of insect infestations and the density and distribution of host plants were studied using Skylab data, aerial photography and ground truth simultaneously. Additional ground truth and aerial photography were acquired between Skylab passes. Three test areas were selected: area 1, of high density citrus, was located northwest of Mission, Texas; area 2, 20 miles north of Weslaco, Texas, irrigated pastures and brush-covered land; area 3 covered the entire Lower Rio Grande Valley and adjacent areas of Mexico. A color composite picture of S-190A data showed patterns of vegetation on both sides of the Rio Grande River clearly delineating the possible avenues of entry of pest insects from Mexico into the United States or from the United States into Mexico. Vegetation that could be identified with conventional color and color IR film included: citrus, brush, sugarcane, alfalfa, irrigated and unimproved pastures

A study of the early detection of insect infestations and density/distribution of host plants

There are no author-identified significant results in this report

A study of the early detection of insect infestations and density/distribution of host plants

There are no author-identified significant results in this report

A study of the early detection of insect infestations and density/distribution of host plants

The author has identified the following significant results. With comparative observations of film types and seasonal influences on reflectance characteristics, many crop varieties can be identified. This study shows that citrus, sugar cane, brush, some winter vegetables, and grain crops could be identified. Vegetative patterns in border areas can be detected. This information can be useful in detecting avenues of entry of pest species and areas of stress that require vigilance in stopping the spread of destructive species. Influence of some environmental factors on crops that may be confused with pest injury, or related factors, can be detected and identified with Skylab data (S-190B)

A study of the early detection of insect infestations and density/distribution of host plants

There are no author-identified significant results in this report

A study of the early detection of insect infestations and density/distribution of host plants

There are no author-identified significant results in this report

A study of early detection of insect infestations and density/distribution of host plants

There are no author-identified significant results in this report

Role of Social Media in Adolescent-Parent Relationships Among At-Risk Youths

This study aimed to understand the role of adolescent and parent social media use on adolescents reported at-risk behaviors, as well as the role of social media among at-risk youths and their parents. Semi-structured interviews, based on interpretive phenomenological analysis, were utilized with six pairs of individuals resulting in 12 total participants. Each pair consisted of an adolescent between the ages of 13 and 17 along with their parent. Data analysis resulted in three themes: encountering negativity on social media did not refrain the adolescent from social media usage, misunderstanding of the parent regarding social media and technology caused challenges in parental monitoring, and the quality of time spent together differed in the perception of the adolescent participants and parent participants. The findings of this study suggest that even though participant pairs reported encountering negativity on social media, they continue to use social media, and parent participants are unaware of the amount of time their adolescent spends on social media, which could be contributed to the lack of quality time they spend with one another. The findings of this research add to the current literature regarding social media and the impact it has on the parent-adolescent relationship among at-risk youth

The monopole mass in the three-dimensional Georgi-Glashow model

We study the three-dimensional Georgi-Glashow model to demonstrate how magnetic monopoles can be studied fully non-perturbatively in lattice Monte Carlo simulations, without any assumptions about the smoothness of the field configurations. We examine the apparent contradiction between the conjectured analytic connection of the `broken' and `symmetric' phases, and the interpretation of the mass (i.e., the free energy) of the fully quantised 't Hooft-Polyakov monopole as an order parameter to distinguish the phases. We use Monte Carlo simulations to measure the monopole free energy and its first derivative with respect to the scalar mass. On small volumes we compare this to semi-classical predictions for the monopole. On large volumes we show that the free energy is screened to zero, signalling the formation of a confining monopole condensate. This screening does not allow the monopole mass to be interpreted as an order parameter, resolving the paradox.Comment: 12 pages, 7 figures, uses revtex. Minor changes made to the text to match with the published version at http://link.aps.org/abstract/PRD/v65/e12500