Photometric study of HD 155555 C in the β\beta Pictoris Association

We are carrying out a series of photometric monitoring to measure the rotation periods of members in the young $\beta$ Pictoris Association, as part of the RACE-OC project (Rotation and ACtivity Evolution in Open Clusters). In this paper, we present the results for HD 155555C which is believed to be physically associated to the spectroscopic binary V824 Ara (HD155555) and thus constituting a triple system. We collected B, V, and R-band photometric data timeseries and discovered from periodogram analysis the rotation period P = 4.43d. Combined with stellar radius and projected rotational velocity, we find this star almost equator-on with an inclination $i$ $\simeq$ 90$^{\circ}$. The rotational properties of HD155555C fit well into the period distribution of other $\beta$ Pic members, giving further support to the suggested membership to the association and to its physical association to V824 Ara. A comparison with Pre-Main-Sequence isochrones from various models allows us to estimate an age of 20$\pm$15 Myr for this triple system.Comment: 16 pages, 7 figure

Mapping of surface activity on the W UMa-type system VW Cephei

After multifilter photometry of the W UMa-type contact binary VW Cep (P = 6.67 hr; G5V + K0V) in 1986/87 revealed large asymmetries in the light curves believed to be caused by large, cool starspot regions on the surface of the larger stars, in Apr. 1987 it was observed with IUE to study the chromospheres and transition regions of the components. During one complete orbital cycle, three SWP and four LWP low dispersion spectra were obtained, including and then excluding the suspected active region. Phase dependent TR line emission strengths were found, most notably C IV, which is 50 percent stronger when the spot region is most visible. The results could be important because VW Cep represents an extreme case for studying stellar dynamo theory and observations can play a crucial role in the unterstanding of magnetic fields and activity cycles in rapidly rotating solar-like stars

Time-Series Ensemble Photometry and the Search for Variable Stars in the Open Cluster M11

This work presents the first large-scale photometric variability survey of the intermediate age (~200 Myr) open cluster M11. Thirteen nights of data over two observing seasons were analyzed (using crowded field and ensemble photometry techniques) to obtain high relative precision photometry. In this study we focus on the detection of candidate member variable stars for follow-up studies. A total of 39 variable stars were detected and can be categorized as follows: 1 irregular (probably pulsating) variable, 6 delta Scuti variables, 14 detached eclipsing binary systems, 17 W UMa variables, and 1 unidentified/candidate variable. While previous proper motion studies allow for cluster membership determination for the brightest stars, we find that membership determination is significantly hampered below V=15,R=15.5 by the large population of field stars overlapping the cluster MS. Of the brightest detected variables that have a high likelihood of cluster membership, we find five systems where further work could help constrain theoretical stellar models, including one potential W UMa member of this young cluster.Comment: 38 pages, 13 figures, accepted for December 2005 AJ, high-resolution version available upon reques

The Magazine Industry: How the Internet Has Changed It All

The goal of this thesis is to understand the changes the magazine industry has seen through the emergence of digital technology. This project can help us further understand the role of online magazines, and how their reading experience differs from reading the traditional print magazines. This project can help consumers and producers understand what magazine readers are looking for in their magazine experience and what factors make them choose to read magazines from one platform to another. This is important for producers and publishers because it helps decide what content is worth creating based on the wants of consumers

Paper, Pulp, And Place: Investigating Connections Through Process Art

A small papermaking studio was assembled for making archival quality handmade papers and pulps appropriate for printmaking, book arts, and paper cast to demonstrate the connections between artist practice, materials, and medium through process art. In the home studio a variety of machine-made cotton and abaca linters from an artist supplier were torn by hand and beaten by individual fiber types with a standard kitchen blender. Common papermaking additives were mixed into the pulp in controlled measurements to improve quality and colors. Application of the wet sheets and pulps for papercast and dried 3-dimensional paper sheets demonstrated that the blender method for pulping was effective for small studio work. With the formation of papercasts and sheets the artist interpreted and represented the narrative subjects of trauma and connected experience with the narrative of labor and formation inherent in the process art. This suggests that by working with an art substance through many steps of production, an artist has more control and connection to the medium itself creating a deeper dialog between process art and material applications

Pelagic Feeding Ecology of Dovekies, Alle alle, in Lancaster Sound and Western Baffin Bay

Adult (AD), Subadult (SA), and hatching year (HY) dovekies were collected at sea in 1976, 1978, and 1979 (n=410) for food habits studies. In May and June, AD and SA dovekies ate mostly copepods (99.8% of dry weight in AD, 100% in SA); in August, amphipods became more important (59% in AD, 90% in SA). Adult males accompanied chicks to sea where both groups fed largely on Parathemisto amphipods (99.7% in AD, 97% in chicks). Once abandoned by the adults, HY dovekies ate Parathemisto (59.8% of dry weight), Apherusa glacialis (13.6%), and Onisimus glacialis (5.6%) amphipods; arctic cod (Boreogadus saida) (14.5%); calenoid copepods (5.5%); and other items (1%). Seasonal changes in diet were, in part, related to a presumed seasonal increase of suitable amphipods in surface waters. HY dovekie diets varied geographically and with year. Some food taxa were larger in dovekies collected in waters associated with an intrusive current flowing into and out of the mouth of Lancaster Sound than in those collected in offshore Baffin Bay. In 1978, Parathemisto and Apherusa glacialis were smaller than in 1979 or 1976: HY dovekies apparently compensated by taking more copepods. HY dovekies were smaller on a given date in 1978 but ate similar total amounts of food and grew at similar rates in all three years. The small size of amphipods in 1978 was probably due to unusually late breakup of ice and its probable inhibitory effects on primary and secondary production. In 1978, many non-breeding (AD and SA) dovekies molted in pack ice that persisted until mid-August. In 1979, when pack ice dispersed early, no non-breeding dovekies were collected in August.Key words: dovekie, Alle alle, trophic relationships, pelagic seabird ecology, arctic marine systems, molt&nbsp

Students avoided jeans Monday

I would like to take the time to say a few words about Monday\u27s wear jeans to support gay/lesbian/bisexual awareness week. Sadly, my next statement will cause most readers of this letter to turn the page in disgust. I support the rights and feelings of all homosexuals. There, I\u27ve done it now. Shoot me. Beat me and throw me off a bridge. I\u27ve committed the ultimate sin

The Examination of White Matter Microstructure, Autism Traits, and Social Cognitive Abilities in Neurotypical Adults

The purpose of this study was to examine the relationships among mentalizing abilities, self-reported autism traits, and two white matter tracts, uncinate fasciculus (UF) and inferior longitudinal fasciculus (ILF), in neurotypical adults. UF and ILF were hypothesized to connect brain regions implicated in a neuroanatomical model of mentalizing. Data were available for 24 neurotypical adults (mean age = 21.92 (4.72) years; 15 women). Tract-based spatial statistics (TBSS) was used to conduct voxelwise cross-participant comparisons of fractional anisotropy (FA) values in UF and ILF as predicted by mentalizing abilities and self-reported autism traits. Self-reported autism traits were positively related to FA values in left ILF. Results suggest that microstructural differences in left ILF are specifically involved in the expression of subclinical autism traits in neurotypical individuals

The Impact of the COVID-19 Pandemic on Antimicrobial Stewardship Practices and Their Effect on Veterinary Medicine

Antimicrobials are essential in the treatment of diseases in both humans and animals, but antimicrobial resistance threatens their efficacy. As more microorganisms become resistant to an ever-growing list of antimicrobials, diseases that used to be simple to treat are becoming increasingly difficult to manage. The major factors contributing to antimicrobial resistance are overuse and misuse of antimicrobials. In order to combat the problem of resistance, antimicrobial stewardship programs that aim to improve antimicrobial prescribing and use practices are becoming increasingly widespread. These programs are quite common in human medicine, but the COVID-19 pandemic disrupted many aspects of life, including antimicrobial stewardship. In this study, three classes of antibacterials, beta-lactams, macrolides, and fluoroquinolones, will be reviewed as well as two antiparasitic classes, quinolines and avermectins, before investigating the effect the COVID-19 pandemic has had on antimicrobial stewardship in human medicine. The aim of this study is to assess the impact the pandemic had on these programs, and whether this decreased their effectiveness in reducing the behaviors and practices associated with the development of antimicrobial resistance. This information will then be applied to veterinary medicine using a One Health perspective, which recognizes that human, animal, and environmental health are intimately connected