Using Simulated Farm Case Studies to Teach Financial and Risk Management Concepts

Two simulated farm case studies provide a means for teaching financial and risk management strategies to western Kentucky grain farmers. Aggregate financial data for 227 grain farms define the case studies, which illustrate how cost and debt affect cash flow and working capital over a 5-year period. Responding to the case studies, farmers were able to discuss these financial concepts in a group setting among competitor neighbors without revealing personal business information. The use of composite financial data engaged the farmers and allowed for improved discussion on risk management products and the potential to protect working capital over multiple years. Extension professionals can apply the methods described

Validation of a Finite Element Modelling Process for Auxetic Structures under Impact

Auxetic materials behave unconventionally under deformation, which enhances material properties such as resistance to indentation and energy absorption. Auxetics, therefore, have the potential to enhance sporting protective equipment. This study explores finite element modeling, additive manufacturing and impact testing of three auxetic lattices, and a conventional equivalent, with a view to advance auxetic implementation within sports equipment. The lattices are modeled and impacts are simulated between 1 J and 5 J, for flat and hemispherical drop hammers. Simulation outputs, including peak impact force, impact duration, maximum axial strain and Poisson’s ratio are compared to experimental results from equivalent impact energies on additively manufactured lattices, using an instrumented drop tower and a high‐speed camera. The simulation and experimental results show broad agreement for all lattices and scenarios, demonstrated by comparative force vs time plots and maximum compression images. The benefits of developing and validating finite element models of three auxetic lattices (as well as the conventional honeycomb lattice) under various impact scenarios as a process is discussed, including material characterization of an exemplar thermoplastic polyurethane. Future work could use the models to investigate auxetic lattices further, selecting and tailoring candidates to further explore their potential application to specific personal protective equipment in sport

Assessing the Performance of Agricultural Development Investments A Practical Guide using the SIPmath™ Standard

The global community must make significant investments to address climate change and build resilience in agricultural systems. Within climate-smart agriculture investment portfolios, all sizable projects face uncertainty and risk and must be adaptively managed to achieve success.[1]–[4]. This paper presents notes for calibrating a user-friendly tool to screen and compare investment options: The Climate-Smart Agriculture Investment Plan (CSAIP) Cost Benefit-Analysis (CBA) Tool. The CSAIP-CBA models a 20-year period following investment implementation and uses a probabilistic approach to account for uncertainty in project costs and benefits subject to risks and adoption barriers. The model includes measures for number of beneficiaries, adoption rates, estimated impacts, and budget and costs while also considering risks and GHG emissions. Implementation examples of the CSAIP-CBA tool are drawn from investment portfolios prepared for Ghana and Burkina Faso; these suggest that carbon pricing and adoption rate assumptions should be considered when prioritizing investments

A near IR imaging survey of intermediate and high-mass young stellar outflow candidates

We have carried out a near-infrared imaging survey of luminous young stellar outflow candidates using the United Kingdom Infrared Telescope. Observations were obtained in the broad band K (2.2 mu) and through narrow band filters at the wavelengths of H_2 v=1--0 S(1) (2.1218 mu) and Br gamma (2.166 mu) lines. Fifty regions were imaged with a field of view of 2.2 X 2.2 arcmin^2. Several young embedded clusters are unveiled in our near-infrared images. 76% of the objects exhibit H_2 emission and 50% or more of the objects exhibit aligned H_2 emission features suggesting collimated outflows, many of which are new detections. These observations suggest that disk accretion is probably the leading mechanism in the formation of stars, at least up to late O spectral types. The young stellar objects responsible for many of these outflows are positively identified in our images based on their locations with respect to the outflow lobes, 2MASS colours and association with MSX, IRAS, millimetre and radio sources. The close association of molecular outflows detected in CO with the H_2 emission features produced by shock excitation by jets from the young stellar objects suggests that the outflows from these objects are jet-driven. Towards strong radio emitting sources, H_2 jets were either not detected or were weak when detected, implying that most of the accretion happens in the pre-UCHII phase; accretion and outflows are probably weak when the YSO has advanced to its UCHII stage.Comment: 64 pages, 53 figures, Accepted for publication in the MNRA

Attributes of legitimate venture failure impressions

The current research investigates the effectiveness of impression management strategies available to entrepreneurs to foster social legitimacy with stakeholders following venture failure. We use a conjoint experiment to examine how different attributions of causes of failure influence the general public's legitimacy judgments. The most effective strategy proves to be the entrepreneurs distancing themselves from the failure, in that they attribute the failure to external factors that are not under the entrepreneurs' volitional control, and brought about by circumstances that are unlikely to reoccur. Our analysis also considers how the audience members' dispositional agreeableness and general self-efficacy influence judgment formation

Response of the magnetosphere‐ionosphere system to a sudden southward turning of interplanetary magnetic field

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/94580/1/jgra19458.pd

A disk of dust and molecular gas around a high-mass protostar

The processes leading to the birth of low-mass stars such as our Sun have been well studied, but the formation of high-mass (> 8 x Sun's mass) stars has heretofore remained poorly understood. Recent observational studies suggest that high-mass stars may form in essentially the same way as low-mass stars, namely via an accretion process, instead of via merging of several low-mass (< 8 Msun) stars. However, there is as yet no conclusive evidence. Here, we report the discovery of a flattened disk-like structure observed at submillimeter wavelengths, centered on a massive 15 Msun protostar in the Cepheus-A region. The disk, with a radius of about 330 astronomical units (AU) and a mass of 1 to 8 Msun, is detected in dust continuum as well as in molecular line emission. Its perpendicular orientation to, and spatial coincidence with the central embedded powerful bipolar radio jet, provides the best evidence yet that massive stars form via disk accretion in direct analogy to the formation of low-mass stars

A General Catalogue of Molecular Hydrogen Emission-Line Objects (MHOs) in Outflows from Young Stars

We present a catalogue of Molecular Hydrogen emission-line Objects (MHOs) in outflows from young stars, most of which are embedded. All objects are identified in the near-infrared lines of molecular hydrogen, all reside in the Milky Way, and all are associated with jets or molecular outflows from young stars. Objects in both low and high-mass star forming regions are included. This catalogue complements the existing database of Herbig-Haro objects; indeed, for completeness, HH objects that are detected in H2 emission are included in the MHO catalogue.Comment: 8 Pages, 5 figures. Accepted for publication in A&A. Searchable catalogue/Data tables available from http://www.jach.hawaii.edu/UKIRT/MHCat

The Role of Thailand in the International Trade in CITES-Listed Live Reptiles and Amphibians

BACKGROUND: International wildlife trade is one of the leading threats to biodiversity conservation. The Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES) is the most important initiative to monitor and regulate the international trade of wildlife but its credibility is dependent on the quality of the trade data. We report on the performance of CITES reporting by focussing on the commercial trade in non-native reptiles and amphibians into Thailand as to illustrate trends, species composition and numbers of wild-caught vs. captive-bred specimens. METHODOLOGY/PRINCIPAL FINDINGS: Based on data in the WCMC-CITES trade database, we establish that a total of 75,594 individuals of 169 species of reptiles and amphibians (including 27 globally threatened species) were imported into Thailand in 1990-2007. The majority of individuals (59,895, 79%) were listed as captive-bred and a smaller number (15,699, 21%) as wild-caught. In the 1990s small numbers of individuals of a few species were imported into Thailand, but in 2003 both volumes and species diversity increased rapidly. The proportion of captive-bred animals differed greatly between years (from 0 to >80%). Wild-caught individuals were mainly sourced from African countries, and captive-bred individuals from Asian countries (including from non-CITES Parties). There were significant discrepancies between exports and imports. Thailand reports the import of >10,000 individuals (51 species) originating from Kazakhstan, but Kazakhstan reports no exports of these species. Similar discrepancies, involving smaller numbers (>100 individuals of 9 species), can be seen in the import of reptiles into Thailand via Macao. CONCLUSION/SIGNIFICANCE: While there has been an increase in imports of amphibian and reptiles into Thailand, erratic patterns in proportions of captive-bred specimens and volumes suggests either capricious markets or errors in reporting. Large discrepancies with respect to origin point to misreporting or possible violations of the rules and intentions of CITES