Prebisch-Singer: Debates, Growth Model and Estimates

Prebisch and Singer (henceforth PS) have initiated several debates in economics, which have generated much research. Some of these debates may have converged to a compromise, whereas others are much less researched. We briefly summarize them in the next section in order to point out that the implications for growth theory have been largely neglected. Then we will present a growth model and estimate which show that income and price elasticities matter for long-run growth.Economics ;

Simultaneous Estimation of Income and Price Elasticities of Export Demand, Scale Economies and Total Factor Productivity Growth for Brazil

This paper focuses on a model in which low (high) export demand elasticities and the fact that developing countries are importers of capital goods help explaining the slow (high) growth of these countries. The question arises whether export demand elasticities are low or high. For answering this question, export demand elasticities for the case of Brazil are estimated using a growth model. As a by-product of estimating the model, we obtain estimates for total-factor productivity growth and for scale economies. Based on the results from estimation we calculate steady-state growth rates, engine and handmaiden effects of growth as well as dynamic steady-state gains from trade. The model and the results are discussed in regard to several strands of literature.international economics and trade ;

Thermoelectric measurements of energy deposition during shock-wave consolidation of metal powders of several sizes

The degree of shock energy localization within individual particles and between neighboring particles of different size was explored during shock-wave consolidation of spherical metal powders. The thermoelectric voltage generated by the passage of a shock wave through a copper powder-constantan powder interface was recorded. The sizes of the copper and constantan powders were varied between mean diameters of 40 and 98 µm. Shock-wave pressures of 5 GPa were applied by flyer plate impact, and the resulting voltage versus time signals were collected with a 10 ns time resolution. In order to analyze the signals, a simulation of the thermocouple system was developed to account for the effects of multiple particle interactions and a slightly nonplanar copper-constantan interface. The resulting simulated voltage versus time signals are a good match for the observed signals when the size ratio of the copper and constantan particles is less than a factor of 2, and reveal the preferential deposition of energy in smaller particles at the expense of larger particles within the size range examined. The amount of energy localized near particle surfaces was found to be a majority of all the energy, with a significant minority deposited throughout the particle bulk

North by Northwest : Information literacy at Yukon College and Lakehead University

In Northern communities, isolation is a fact of life and common southern "realities" like high-speed internet, libraries (both public and academic) within driving distance and f2f instruction are not the norm. Due to these factors, online instruction is a core component in northern academic institutions and as such requires a little bit more preparation. As well, another key factor to consider is the diverse student population: First Nations, mature, part-time, first generation university students, and professionals upgrading their credentials. The diverse academic backgrounds of these students makes designing the standard library tutorial a challenge; one size does not fit all in the north. At the same time, this might be the only way that students interact with a librarian so the online environment becomes significant to these students' academic studies (and hopefully success). So how does an academic library with such a variety of students a) reach these students? b) design online tutorials targeting a variety of learning styles? and c) assess whether any of this is working? This session will show you how to take a generic one hour information literacy class and turn it into an online session that will meet the needs of a diverse student population. The presenters will discuss effective pedagogical approaches to online instruction, how to teach specific e-resources and finally how to ensure that the students are actually finding the Library's e-resources and using them effectively and efficiently. This presentation won't focus as much on software, although we will be discussing what we use, it's more about how to use the software to teach InfoLit online effectively. We will conclude with a discussion on how to beta-test your new online approach to Information Literacy Instruction before launching it live for the students. So, come to this session and see how two northern (Ontario and Yukon) librarians are devising new and alternative methods of reaching out to students via a variety of methods and assessing their efforts. How, in fact, we have to examine "every angle" such as mode of delivery, type of student, pedagogical theory, etc. to ensure that we are serving our diverse populations well and contributing to the retention and success of these students

Correlation of shock initiated and thermally initiated chemical reactions in a 1:1 atomic ratio nickel-silicon mixture

Shock initiated chemical reaction experiments have been performed on a 1:1 atomic ratio mixture of 20- to 45-µm nickel and –325 mesh crystalline silicon powders. It has been observed that no detectable or only minor surface reactions occur between the constituents until a thermal energy threshold is reached, above which the reaction goes to completion. The experiments show the energy difference between virtually no and full reaction is on the order of 5 percent. Differential scanning calorimetery (DSC) of statically pressed powders shows an exothermic reaction beginning at a temperature which decreases with decreasing porosity. Powder, shock compressed to just below the threshold energy, starts to react in the DSC at 621 °C while powder statically pressed to 23% porosity starts to react at about 30 °C higher. Tap density powder starts to react at 891 °C. The DSC reaction initiation temperature of the shock compressed but unreacted powder corresponds to a thermal energy in the powder of 382 J/g which agrees well with the thermal energy produced by a shock wave with the threshold energy (between 384 and 396 J/g). (Thermal energies referenced to 20 °C.) A sharp energy threshold and a direct correlation with DSC results indicates that the mean thermal energy determines whether or not the reaction will propagate in the elemental Ni+Si powder mixture rather than local, particle level conditions. From this it may be concluded that the reaction occurs on a time scale greater than the time constant for thermal diffusion into the particle interiors

Reflections On Hearing The Other Side, In Theory And In Practice

In response to my book’s finding that there is a tradeoff between two apparently desirable traits—a propensity to participate in politics, on the one hand, and to expose oneself to disagreeable political ideas, on the other—symposium participants suggest a number of reasons why this tradeoff should not trouble participatory democratic theorists. One argument is that electoral advocacy (the type of participation I measure) is not an important form of participation anyway, so we are better off without it. However, those people who do not vote also tend not to participate in politics in other ways, so electoral advocacy is the lowest possible bar for defining participation. Partisans are also more likely to be well informed and to offer coherent reasons for their political preferences. A second argument suggests that deliberative theorists have somewhat contradictory views of social influence, encouraging it in the context of deliberative encounters but perceiving it as pernicious when members of political parties influence their members. A third response is to posit a division of labor between closed-minded partisan advocates and open-minded people who are exposed to cross-cutting debate. However, it is difficult to see how the benefits of cross-cutting exposure will be conveyed to the advocates who participate in meaningful ways

SLIDES: Intermountain Oil and Gas BMP Project

Presenter: Kathryn Mutz, Natural Resources Law Center 19 slide