Thermodynamics of Lithium Intercalation into Graphites and Disordered Carbons

The temperature dependence of the open-circuit potential of lithium half-cells was measured for electrodes of carbon materials having different amounts of structural disorder. The entropy of lithium intercalation, DeltaS, and enthalpy of intercalation, DeltaH, were determined over a broad range of lithium concentrations. For the disordered carbons, DeltaS is small. For graphite, an initially large DeltaS decreases with lithium concentration, becomes negative, and then shows two plateaus associated with the formation of intercalation compounds. For all carbons DeltaH is negative, and decreases in magnitude with increased lithium concentration. For lithium concentrations less than x = 0.5 in LixC6, for the disordered carbons the magnitude of DeltaH is significantly more negative than for graphite (i.e., intercalation is more exothermic). The measurements of DeltaH provide an energy spectrum of chemical environments for lithium. This spectrum can be used to understand some of the concentration dependence of configurational entropy, but the negative values of DeltaS require another contribution to entropy, perhaps vibrational in origin

A Naïve Bidder in a Common Value Auction

We study a common value auction in which two bidders compete for an item the value of which is a function of three independent characteristics. Each bidder observes one of these characteristics, but one of them is 'naive' in the sense that he does not realize the other bidder's signal contains useful information about the item's value. Therefore, this bidder bids as if this were an Independent Private Values auction. We show that the naive's bidder payoff exceeds that of his fully rational opponent for all symmetric unimodal signal distributions. We also show that naive bidding is persistent in the evolutionary sense.

Sustainable deltas in the Anthropocene

What are the possible trajectories of delta development over the coming decades? Trajectories will be determined by the interactions of biophysical trends such as changing sediment supplies, subsidence due to compaction of sediment and climate change, along with key socio-economic trends of migration and urbanisation, agricultural intensification, demographic transition, economic growth and structural change of the economy. Knowledge and understanding of plausible trajectories can inform management choices for deltas in the Anthropocene, including new policy perspectives and innovative adaptation. The emergence of visionary delta management plans in some large deltas, such as the Bangladesh Delta Plan 2100, is an important and necessary component. This chapter synthesises the state of knowledge and highlights key elements of science that will inform decisions on future management of deltas.<br/

Hub-and-spoke free trade areas: Theory and evidence from Israel

We study how the sequential formation of free trade areas affects trade flows between member countries. In a three-country, three-good model of comparative advantage if two countries have an FTA, and both sign a similar agreement with the third, trade between the two decreases. However, if only one of them signs an additional FTA, a hub- and-spoke pattern arises, and trade between the initial members increases. Israel's experience lends strong support to our model: trade between Israel and the EU, subject to an FTA since 1975, increased by an additional 29% after the introduction of the US-Israel FTA in 1985.free trade areas; hub-and-spoke; Israel; trade flows

Reduction of deltaic channel mobility by tidal action under rising relative sea level

As Holocene river deltas continue to experience sea-level rise, sediment carried by distributary channels counteracts delta-plain drowning. Many deltas worldwide are subject to tidal action, which strongly affects the morphology of distributary channels and could also influence their mobility. Here we show, through physical laboratory experiments, that distributary-channel mobility can be dramatically reduced in systems affected by tides in comparison to an identical system with no tides, and that the mobility of distributary channels decreases as the ratio of tidal to fluvial energy increases. This effect occurs even if new accommodation space is created by rising relative sea level. By analyzing synthetic stratigraphy derived from both digital elevation data and time-lapse photography, we show also that the reduction of channel mobility in tidal deltas increases channel stacking and connectivity in the stratigraphic record

Adoption of Pollution Prevention: The Role of Information Spillover, Mandatory Regulation, and Voluntary Program Participation

Interest in promoting Pollution Prevention (P2) has been increasing since 1991, following the passage of the Pollution Prevention Act (PPA) of 1990. As part of the PPA, facilities that are subject to the Toxics Releases Inventory (TRI) are required to disclose the number of incremental P2 activities for each listed chemicals from 1991 onward. Though the disclosure is required by the PPA, the adoption of P2 remains a voluntary initiative by firms. To promote P2 ethic among firms, the U.S.EPA has established several voluntary programs and P2 information clearinghouse. P2 technologies were more likely to be facility- and operation- specific and involved considerable information costs and uncertainty. Firms might learn about P2 technologies from their peers through information spillovers. Furthermore, the adoption of P2 technologies might have been motivated in part by regulatory pressures and in part by voluntary commitments. To investigate the role of information spillover, regulatory pressure and voluntary commitment in motivating the adoption of P2 technologies, we focus on the first voluntary program initiated by the U.S. EPA, the 33/50 program. The objective of the program was to reduce the releases of 17 chemicals by 33% by 1992 and by 50% by 1995. It also sought to promote P2 as the preferred method to achieve the reduction. We conduct the empirical analysis on 6974 facilities that were eligible for the 33/50 program from 1991 to 1995. We estimate the number of P2 technologies adopted for 33/50 chemicals and other TRI chemicals at the facility level with respect to program participation, compliance costs to regulations, prior P2 experience by the neighbors on the respective chemicals, and the program participation ratio in the neighborhood. We address the endogeneity of program participation with instrumental variables, and control for location and industry fixed effects. We find that facilities were more likely to learn about adoption of P2 technologies from their industry peers. The direct impact of program participation was only evident for 33/50 chemicals, and the presence of program participants did not significantly motivate P2 adoption in the neighborhood.Pollution prevention, Toxics Release Inventory (TRI), Voluntary 33/50 program, Information spillover, Environmental Economics and Policy, Q55, C21, L51,

GREEN MANAGEMENT AND THE NATURE OF TECHNICAL INNOVATION

Innovation is a key component of a firm's strategy to improve market competitiveness and operational efficiency as well as to respond effectively to changing consumer preferences and regulations. A firm has the choice of undertaking different types of innovations that differ in the extent to which they involve changes in products, processes or practices and lead to gains in efficiency or brand image. We postulate that the extent and nature of innovation undertaken by a firm depends on its management system which not only influences its organizational structure, but also the incentives for making continual improvement in its technical capabilities, the extent of employee involvement in decision making and the internal communication channels for information sharing. We develop an empirical framework to examine the extent to which a management system promotes innovation and how its effect differs across different types of innovations.Environmental Economics and Policy, Research and Development/Tech Change/Emerging Technologies,

The Lippmann–Schwinger Formula and One Dimensional Models with Dirac Delta Interactions

We show how a proper use of the Lippmann–Schwinger equation simplifies the calculations to obtain scattering states for one dimensional systems perturbed by N Dirac delta equations. Here, we consider two situations. In the former, attractive Dirac deltas perturbed the free one dimensional Schrödinger Hamiltonian. We obtain explicit expressions for scattering and Gamow states. For completeness, we show that the method to obtain bound states use comparable formulas, although not based on the Lippmann–Schwinger equation. Then, the attractive N deltas perturbed the one dimensional Salpeter equation. We also obtain explicit expressions for the scattering wave functions. Here, we need regularisation techniques that we implement via heat kernel regularisation

Sensitivities for Bermudan Options by Regression Methods

In this article we propose several pathwise and finite difference based methods for calculating sensitivities of Bermudan options using regression methods and Monte Carlo simulation. These methods rely on conditional probabilistic representations which allow, in combination with a regression approach, for efficient simultaneous computation of sensitivities at many initial positions. Assuming that the price of a Bermudan option can be evaluated sufficiently accurate, we develop a method for constructing deltas based on least squares. We finally propose a testing procedure for assessing the performance of the developed methods.American and Bermudan options, Optimal stopping times, Monte Carlo simulation, Deltas, Conditional probabilistic representations, Regression methods