210 research outputs found
Parametric study of an elastic singularity-based frequency doubler for concatenation
No full textThe use of elastic frequency multipliers presents the ideal platform to address the coupling between the footprint and range of motion of elastic mechanisms. By transmitting unidirectional into reciprocating motion they efficiently increase the range of motion without a huge compromise in size. In this thesis, an elasticfrequency doubler based on an eight-bar mechanism that exploits the displacement around a singularity to double the frequency is presented. Higher frequency multiplications can be achieved by concatenating this mechanism, surpassing previous designs in the literature. To facilitate effective concatenation, criteria for optimization were established and a design study was conducted to determine the optimal geometrical parameters of the mechanism. The utilization of not only the actuation capabilities but simultaneously leveraging the inherently stored strain energy during operation has the potential to serve as the foundation for a novel group of architected materials. The embodiment of both functionalities makes these architected materials highly desirable for control in autonomous robots where, through the exploitation of close synergy and decrease in dissipation, this multifunctionality could increase the efficiency in usage of the usually limited space and available energy.https://github.com/Luuk-Samuels/ThesisLuuk GitHub page containing all relevant extra information like movies, datasets, scripts, and figures.Mechanical Engineering | Precision and Microsystems Engineerin
Shadows of the therapy relationship
No full textThe author argues that the relational turn in psychotherapy has led to moralism, conformism and hypocrisy on the part of many clinicians. Relationality cannot engage with the phenomenon of solitude in a satisfactory manner leading to a potential flight from the unconscious. The author proposes that there is more than one therapy relationship to sondier and that the key task is to hold their simultaneity in mind. He proposes a methodology by which this might be done. The author argues that what is being discussed will be incomprehensible in terms of the project of state regulation of psychotherapy currently being proposed by the British Government
THE SPARTAN SCHOOL OF INSTITUTIONAL ECONOMICS AT MICHIGAN STATE UNIVERSITY
No full textHeterodox scholarship at Michigan State University (MSU) was influenced by the institutional economics of John R. Commons at Wisconsin. But it was far from monolithic and had many other sources and originality of its own. A case can be made that the center of institutional economics moved across Lake Michigan from Madison to East Lansing and blossomed in the second half of the 20th century with such Wisconsin Ph.D's as Raleigh Barlowe, Warren Samuels, Allan Schmid, Harry Trebing, and others. Equally important in making MSU a center of institutional economics were scholars from other institutional backgrounds such as Paul Strassmann, economic development; Robert Solo, science and technology; James Shaffer, agricultural marketing and consumer behavior; Nicholas Mercuro, law and economics; and others.Institutional and Behavioral Economics,
Rationality, preferences and irregular war
No full textWe suppose that civilians under threat prefer certain situations within a context of irregular war and endangered survival; they will prefer those situations associated with greater probabilities of survival. Using lexicographical preferences and belief systems, we have shown that civilians will choose not to remain in situations having a lower probability of survival. Linking into social networks allows for shorter deliberation processes, lower decision costs and faster convergence towards collective decision-making. Civilian displacement thus becomes the outcome of a rational decision-making procedure.Survival
An R&D-Based Model of Multi-Sector Growth
No full textWe develop a multi-sector general equilibrium model in which productivity growth is driven by the production of sector-specific knowledge. In the model, we find that long run differences in total factor productivity growth across sectors are independent of the parameters of the knowledge production function except for one, which we term the fertility of knowledge. Differences in R&D intensity are also independent of most other parameters. The fertility of knowledge in the capital sector is central to the growth properties of the model economy.Endogenous technical change, multisector growth, fertility of knowledge, total factor productivity, R&D intensity, investment-specific technical change
Evidence on Cross-Industry Input Allocation and Country-Level TFP Growth
No full textParallel Sessions A: Total Factor Productivity, Potential Outpupt, and Economic Growt
Accumulation of Human and Nonhuman Capital Revisited
No full textParallel Sessions D: Measuring Capita
Forecasting with many models: Model confidence sets and forecast combination
No full textA longstanding finding in the forecasting literature is that averaging forecasts from different models often improves upon forecasts based on a single model, with equal weight averaging working particularly well. This paper analyzes the effects of trimming the set of models prior to averaging. We compare different trimming schemes and propose a new one based on Model Confidence Sets that take into account the statistical significance of historical out-of-sample forecasting performance. In an empirical application of forecasting U.S. macroeconomic indicators, we find significant gains in out-of-sample forecast accuracy from our proposed trimming method
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