We present precision measurements of the 3 He + 4 He → 7 Be reaction in the range Ec.m. = 0.33 to 1.23 MeV using a small gas cell and detection of both prompt γ rays and 7 Be activity. Our prompt and activity measurements are in good agreement within the experimental uncertainty of several percent. We find S(0) = 0.595 ± 0.018 keV b from fits of the Kajino theory to our data. We compare our res...

In both the Sun and the early universe, the He(α,γ)Be reaction plays a key role. The rate of this reaction is the least certain nuclear input needed to calculate both the primordial Li abundance in big bang nucleosynthesis (BBN) and the solar neutrino flux. Taking advantage of several recent highly precise experiments, we analyse modern He(α,γ)Be data using a robust and minimally model dependen...

We study the impact of non-Abelian T-duality transformations on a string based cosmological model. The implementation of the pre-big-bang scenario is investigated. We found a region of the dual phase where such a picture is possible. e-mail: [email protected] e-mail: [email protected] CNRS UPRES-A 6083

Soil and water conservation (SWC) practices have been promoted in the highlands of Ethiopia during the last four decades. However, the level of adoption of SWC practices varies greatly. This paper examines the drivers of different stages of adoption of SWC technologies in the north-western highlands of Ethiopia. This study is based on a detailed farm survey among 298 households in three watersh...

In this paper, we draw on concepts from the rational expectations hypothesis (REH) and adaptive learning theory to introduce a new rational expectations theory of technology adoption. Although the REH and adaptive learning theory have been applied in many non-technology contexts, this research is among the first that applies rational expectations and adaptive learning theory to issues related t...

many new technologies have been employed to improve welfare conditions and to provide an optimum utilization of the existing resources in agriculture sector. laser leveling technology is one of the most progressed in maintenance of soil and water resources which itself has an important role in sustainable development. the purpose of this study was to realize the specifications of adopters vs. n...

Due to payoff uncertainties combined with risk aversion and/or real options, farmers may demand a premium in order to adopt conservation tillage practices, over and above the compensation for the expected profit losses (if any). We propose a method of directly estimating the financial incentives for adopting conservation tillage and distinguishing between the expected payoff and the premium of ...

Building on multiple theoretical perspectives, we examined how organizational culture moderates the relationship between power, trust, and a firm’s eSCMS adoption intention. We tested the hypotheses using survey data collected from senior executives in China. Our findings reveal that a target firm’s perceived mediated power would negatively impact its trust toward a dominant firm, while its per...

In this study, we focus on post-adoption transfer behavior between technology products that are not substitutable. Drawing upon the theories and findings of entitativity, the self-perception theory, and technology acceptance model, we proposed a research model. We then validated it through cross-sectional field data collected from users on their post-adoption transfer from one instant messenger...