1,502 research outputs found
Dielectric molding apparatus Patent
Dielectric apparatus for heating, fusing, and hardening of organic matrix to form plastic material into shaped produc
Precipitation detector Patent
Precipitation detector and mechanism for stopping and restarting machinery at initiation and cessation of rai
Optical parameters of leaves of seven weed species
The absorption coefficient (k), infinite reflectance (R), and scattering coefficient (s) were tabulated for five wavelengths and analyzed for statistical differences for seven weed species. The wavelengths were: 0.55-micrometer, 0.65-micrometers, 0.85-micrometer, 1.65-micrometers, and 2.20-micrometer. The R of common lambsquarters (Chenopodium album L.), Johnsongrass (Sorghum halepense (L.) Pers.), and annual sowthistle (Sonchus oleraceus L.) leaves at the 0.85-micrometer wavelength were significantly (p=0.05) higher than for sunflower (Heliantus annus L.), ragweed parthenium (Parthenium hysterophorus L.), or London rocket (Sisymbrium irio L.). Annual sowthistle had the largest k value, and Plamer amaranth (Amaranthus palmer S. Wats.) had the smallest k value at the 0.65 approximately chlorophyll absorption wavelength. In general, john-songress, ragweed parthenium, or London rocket had the largest s values among the five wavelengths, wereas annual sowthistle and plamar amaranth were usually lowest
Stochastic Cooling at the ESR
Stochastic precooling at the ESR storage ring of GSI will be used mainly for experiments with stored radioactive fragment beams. They arrive from the fragment separator with momentum spreads and emittances for which electron cooling is too slow. The installation of components at the ESR is now complete and first commissioning experiments have been performed. Both longitudinal and transverse stochastic cooling have been demonstrated. The paper gives a short account of the system architecture, and of the response of quarter-wave plates and superelectrodes at intermediate energies. The preparation of fragment beams suitable for subsequent electron cooling is discussed for the case that a mixture of different ion species is present in the cooler ring. Results of commissioning and future prospects are presented
Electrical and Thermal Transport at the Planckian Bound of Dissipation in the Hydrodynamic Electron Fluid of WP2
Materials with strongly-correlated electrons exhibit interesting phenomena
such as metal-insulator transitions and high-temperature superconductivity. In
stark contrast to ordinary metals, electron transport in these materials is
thought to resemble the flow of viscous fluids. Despite their differences, it
is predicted that transport in both, conventional and correlated materials, is
fundamentally limited by the uncertainty principle applied to energy
dissipation. Here we discover hydrodynamic electron flow in the Weyl-semimetal
tungsten phosphide (WP2). Using thermal and magneto-electric transport
experiments, we observe the transition from a conventional metallic state, at
higher temperatures, to a hydrodynamic electron fluid below 20 K. The
hydrodynamic regime is characterized by a viscosity-induced dependence of the
electrical resistivity on the square of the channel width, and by the
observation of a strong violation of the Wiedemann-Franz law. From
magneto-hydrodynamic experiments and complementary Hall measurements, the
relaxation times for momentum and thermal energy dissipating processes are
extracted. Following the uncertainty principle, both are limited by the
Planckian bound of dissipation, independent of the underlying transport regime
Why growth equals power - and why it shouldn't : constructing visions of China
When discussing the success of China's transition from socialism, there is a tendency to focus on growth figures as an indication of performance. Whilst these figures are
indeed impressive, we should not confuse growth with development and assume that the former necessarily automatically generates the latter. Much has been done to
reduce poverty in China, but the task is not as complete as some observers would suggest; particularly in terms of access to health, education and welfare, and also in
dealing with relative (rather than absolute) depravation and poverty. Visions of China have been constructed that exaggerate Chinese development and power in the global
system partly to serve political interests, but partly due to the failure to consider the relationship between growth and development, partly due to the failure to disaggregate
who gets what in China, and partly due to the persistence of inter-national conceptions of globalised production, trade, and financial flows
Capillaric-Field Effect Transistors
Controlling fluid flow in capillaric circuits is a key requirement to increase their uptake for assay applications. Capillary action off-valves provide such functionality by pushing an occluding bubble into the channel using a difference in capillary pressure. Previously, we utilized the binary switching mode of this structure to develop a powerful set of fundamental fluidic valving operations. In this work, we study the transistor-like qualities of the off-valve and provide evidence that these structures are in fact functionally complementary to electronic junction field effect transistors. In view of this, we propose the new term capillaric field effect transistor to describe these types of valves. To support this conclusion, we present a theoretical description, experimental characterization, and practical application of analog flow resistance control. In addition, we demonstrate that the valves can also be reopened. We show modulation of the flow resistance from fully open to pinch-off, determine the flow rate–trigger channel volume relationship and demonstrate that the latter can be modeled using Shockley’s equation for electronic transistors. Finally, we provide a first example of how the valves can be opened and closed repeatedly
Responsibility and appropriate blame: The no difference view
How do the fact that an agent is morally responsible for a certain morally objectionable action and the fact that she is an appropriate target of blame for it relate to each other? Many authors inspired by Peter Strawson say that they necessarily co‐occur. Standard answers to the question of why they co‐occur say that the occurrence of one of the facts explains that the other obtains. This article presents a third option: that they are one and the same fact. There is no difference between the fact that a person is an appropriate target of blame for an objectionable action and the fact that she is morally responsible for it. This view has the advantage of being metaphysically more parsimonious and of answering, in an elegant and plausible way, an interesting question about which many standard theories of responsibility keep silent: what is it to be morally responsible simpliciter
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Commuting with a Plan: How Goal-Directed Prospection Can Offset the Strain of Commuting
To get to work, employees need to commute. Across the globe, the average commute is 38 minutes each way per day. It is well known that longer commutes have negative effects on employees’ well-being and job-related outcomes. Yet, commuting may not similarly affect all employees, since some of them may naturally engage in behaviors to offset the negative effects of longer commutes. Drawing on psychological research on self-control, we theorize how engaging in future-oriented thinking about the tasks to complete during the workday (i.e., goal-directed prospection) while commuting to work influences work outcomes. Across two field studies and one field experiment, we find that individuals higher in trait self-control are less likely to report negative effects of longer commutes. While commuting, individuals with higher trait self-control engage in goal-directed prospection, partially offsetting the strain of commuting. In a field experiment, individuals asked to engage in goal-directed prospecting during commuting reported higher levels of job satisfaction and lower levels of emotional exhaustion. Although commuting is typically seen as the least desirable part of an employee’s day, our theory and results point to the benefits of viewing it as a useful time period to engage in goal-directed prospection
New Faculty on the Block: Issues of Stress and Support
The research reported investigated the experiences of new faculty in their first three years of employment in higher education administration programs. New faculty face stress relative to work-life integration, issues pertaining to gender or color, teaching responsibilities, and unclear expectations. The findings of this study highlight the role of graduate school socialization and identification as a chosen student targeting a faculty position as an influence on new faculty and their acclimation during their first years. Implications include the need for intentional mentoring, inclusive support for all students seeking faculty roles, and the need for specificity on the part of hiring committees and new departments regarding expectations. Key to new faculty success is obtaining a sense of work-life integration
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