The ASAS-SN bright supernova catalogue - III. 2016

This catalogue summarizes information for all supernovae discovered by the All-Sky Automated Survey for SuperNovae (ASAS-SN) and all other bright (mpeak ≤ 17), spectroscopically confirmed supernovae discovered in 2016. We then gather the near-infrared through ultraviolet magnitudes of all host galaxies and the offsets of the supernovae from the centres of their hosts from public data bases. We illustrate the results using a sample that now totals 668 supernovae discovered since 2014 May 1, including the supernovae from our previous catalogues, with type distributions closely matching those of the ideal magnitude limited sample from Li et al. This is the third of a series of yearly papers on bright supernovae and their hosts from the ASAS-SN team

The ASAS-SN bright supernova catalogue - III. 2016

This catalogue summarizes information for all supernovae discovered by the All-Sky Automated Survey for SuperNovae (ASAS-SN) and all other bright (mpeak ≤ 17), spectroscopically confirmed supernovae discovered in 2016. We then gather the near-infrared through ultraviolet magnitudes of all host galaxies and the offsets of the supernovae from the centres of their hosts from public data bases. We illustrate the results using a sample that now totals 668 supernovae discovered since 2014 May 1, including the supernovae from our previous catalogues, with type distributions closely matching those of the ideal magnitude limited sample from Li et al. This is the third of a series of yearly papers on bright supernovae and their hosts from the ASAS-SN team

The Stimulatory Gαs Protein Is Involved in Olfactory Signal Transduction in Drosophila

Seven-transmembrane receptors typically mediate olfactory signal transduction by coupling to G-proteins. Although insect odorant receptors have seven transmembrane domains like G-protein coupled receptors, they have an inverted membrane topology, constituting a key difference between the olfactory systems of insects and other animals. While heteromeric insect ORs form ligand-activated non-selective cation channels in recombinant expression systems, the evidence for an involvement of cyclic nucleotides and G-proteins in odor reception is inconsistent. We addressed this question in vivo by analyzing the role of G-proteins in olfactory signaling using electrophysiological recordings. We found that Gαs plays a crucial role for odorant induced signal transduction in OR83b expressing olfactory sensory neurons, but not in neurons expressing CO2 responsive proteins GR21a/GR63a. Moreover, signaling of Drosophila ORs involved Gαs also in a heterologous expression system. In agreement with these observations was the finding that elevated levels of cAMP result in increased firing rates, demonstrating the existence of a cAMP dependent excitatory signaling pathway in the sensory neurons. Together, we provide evidence that Gαs plays a role in the OR mediated signaling cascade in Drosophila

Recreational Amenities, Rural Migration Patterns, and the Great Recession

Natural and recreational amenities have played an important role in drawing migrants to rural areas in the USA over the past 40 years. However, less is known about the independent role of desirable recreational amenities in recent migration patterns, whether these patterns vary by age, and how the most recent economic recession affected them. I find that counties with desirable recreational amenities experienced net in-migration from 2000 to 2010 regardless of other county-level attributes, although the direction and magnitude of the effect varied when taking the age group of migrants into account. The recreation status of a county was a predictor of out-migration among emerging adults and in-migration for all other age groups. The Great Recession had a significant impact on migration trends in rural areas, including reducing the effect of recreational amenities in migration. These findings highlight the importance of refining the definition of “amenities,” how broader economic trends impact growth patterns in rural places, and the age-specific nature of the amenity migration trend. Knowledge about the current drivers of population patterns in rural places can help stakeholders better plan for future population trends and accommodate new or existing residents in rural recreation destinations. This study builds on existing amenity growth literature by providing a more contextual analysis of this demographic trend

The Tourist Area Life Cycle (TALC) and Its Effect on the Quality-of-Life (QOL) of Destination Community

This chapter examines the connection between tourism area life cycle (TALC) and its effects on the quality-of-life (QOL) of destination communities. We posit that as destinations go through structural changes over time, the extent to which the dynamics of change affect the QOL of the resident community varies with the stages of the life cycle. The chapter consists of four major sections. After a brief introduction, the first section presents the concept of TALC and describes the development phases and the indicators that help understand tourism area development. The second section provides a brief discussion on the impact of tourism on the community in relation to TALC, which is then followed by the third section which focuses on the adjustment to change and maintaining the QOL of the community. Section four reviews related literature to support the relation between TALC and QOL of communities. The chapter ends with delineating critical issues for future research, outlining some of the difficulties moving forward, and formulating relevant policy implications that may help the researchers and destination management organizations to further examine the issues that may surround TALC and QOL connections