Basketmaker II Subsistence

In 1986 we (Matson and Chisholm 1986, 1991) we reported on four lines of evidence pointing to maize agriculture being important for Basketmaker II subsistence on Cedar Mesa, Utah, (Figure 1). They included settlement patterns, coprolite analysis, midden analysis, and stable carbon analysis (Aasen 1984; Chisholm and Matson 1994; Lepofsky 1986; Matson 1991, 1994). We also briefy summarized other BM II information which led to the conclusion that the BM II in general was largely based on maize agriculture. Here we summarize the major subsistence evidence from midden, coprolite, and stable isotope analysis, focusing on that which has become available since circa 1990, and evaluate how it compares with the limited information earlier reported on Cedar Mesa

The Legal Framework for eResearch Project

The Legal Framework for e-Research involves mapping out a sophisticated legal framework for e-Research and collaborative innovation. As we transition into the National Collaborative-Research Infrastructure Strategy (NCRIS) era it is vitally important that social and legal aspects of the e-Research framework are developed in step with the rapid advances in technology. Only little work has been done in this area worldwide. This project will link with key international actors to provide an internationally significant project. While the Open Access to Knowledge (OAK) Law project aims to examine the role of open access to all in an Internet world, this project focuses on open innovation within secure knowledge communities – both are vital aspects of the e-Research framework. The critical issue is working out legal models for e-Research that reflect the capacity of the technologies involved and can be implemented quickly, effectively and (in many instances) in an automated way

Creating a Legal Framework for Copyright Management of Open Access within the Australian Academic and Research Sector

There is an increasing recognition, in Australia and internationally, that access to knowledge is a key driver of social, cultural and economic development. The argument for greater access to, and reuse of, research outputs is reinforced by the fact that much research in Australia is funded by public money and, consequently, that there is a public benefit to be served by allowing citizens to access the outputs they have funded.2 This recognition poses both legal and policy challenges, in terms of existing legal frameworks such as copyright law and traditional business models. With the rise of networked digital technologies our knowledge landscape and innovation system is becoming more and more reliant on best practice copyright management strategies and there is a need to accommodate both the demands for open sharing of knowledge and traditional commercialisation models. As a result, new business models that support and promote open innovation are rapidly emerging. This chapter analyses the copyright law framework needed to ensure open access to outputs of the Australian academic and research sector such as journal articles and theses. It overviews the new knowledge landscape, the principles of copyright law, the concept of open access to knowledge, the recently developed open content models of copyright licensing and the challenges faced in providing greater access to knowledge and research outputs

The C. elegans ephrin EFN-4 functions non-cell autonomously with heparan sulfate proteoglycans to promote axon outgrowth and branching

The Eph receptors and their cognate ephrin ligands play key roles in many aspects of nervous system development. These interactions typically occur within an individual tissue type, serving either to guide axons to their terminal targets or to define boundaries between the rhombomeres of the hindbrain. We have identified a novel role for the Caenorhabditis elegans ephrin EFN-4 in promoting primary neurite outgrowth in AIY interneurons and D-class motor neurons. Rescue experiments reveal that EFN-4 functions non-cell autonomously in the epidermis to promote primary neurite outgrowth. We also find that EFN-4 plays a role in promoting ectopic axon branching in a C. elegans model of X-linked Kallmann syndrome. In this context, EFN-4 functions non-cell autonomously in the body wall muscle, and in parallel with HS biosynthesis genes and HSPG core proteins, which function cell autonomously in the AIY neurons. This is the first report of an epidermal ephrin providing a developmental cue to the nervous system

Computational Prediction and Molecular Characterization of an Oomycete Effector and the Cognate Arabidopsis Resistance Gene

Hyaloperonospora arabidopsidis (Hpa) is an obligate biotroph oomycete pathogen of the model plant Arabidopsis thaliana and contains a large set of effector proteins that are translocated to the host to exert virulence functions or trigger immune responses. These effectors are characterized by conserved amino-terminal translocation sequences and highly divergent carboxyl-terminal functional domains. The availability of the Hpa genome sequence allowed the computational prediction of effectors and the development of effector delivery systems enabled validation of the predicted effectors in Arabidopsis. In this study, we identified a novel effector ATR39-1 by computational methods, which was found to trigger a resistance response in the Arabidopsis ecotype Weiningen (Wei-0). The allelic variant of this effector, ATR39-2, is not recognized, and two amino acid residues were identified and shown to be critical for this loss of recognition. The resistance protein responsible for recognition of the ATR39-1 effector in Arabidopsis is RPP39 and was identified by map-based cloning. RPP39 is a member of the CC-NBS-LRR family of resistance proteins and requires the signaling gene NDR1 for full activity. Recognition of ATR39-1 in Wei-0 does not inhibit growth of Hpa strains expressing the effector, suggesting complex mechanisms of pathogen evasion of recognition, and is similar to what has been shown in several other cases of plant-oomycete interactions. Identification of this resistance gene/effector pair adds to our knowledge of plant resistance mechanisms and provides the basis for further functional analyses

Understanding the circumgalactic medium is critical for understanding galaxy evolution

Galaxies evolve under the influence of gas flows between their interstellar medium and their surrounding gaseous halos known as the circumgalactic medium (CGM). The CGM is a major reservoir of galactic baryons and metals, and plays a key role in the long cycles of accretion, feedback, and recycling of gas that drive star formation. In order to fully understand the physical processes at work within galaxies, it is therefore essential to have a firm understanding of the composition, structure, kinematics, thermodynamics, and evolution of the CGM. In this white paper we outline connections between the CGM and galactic star formation histories, internal kinematics, chemical evolution, quenching, satellite evolution, dark matter halo occupation, and the reionization of the larger-scale intergalactic medium in light of the advances that will be made on these topics in the 2020s. We argue that, in the next decade, fundamental progress on all of these major issues depends critically on improved empirical characterization and theoretical understanding of the CGM. In particular, we discuss how future advances in spatially-resolved CGM observations at high spectral resolution, broader characterization of the CGM across galaxy mass and redshift, and expected breakthroughs in cosmological hydrodynamic simulations will help resolve these major problems in galaxy evolution.Comment: Astro2020 Decadal Science White Pape