High heat rate testing of thermal response of carbon-phenolic FM-5055

A test facility was constructed for measurement of thermal response of decomposing polymers exposed to initial heating rates up to 250 °C/sec and maximum temperatures exceeding 2000 °C. Eight experimental runs were performed with the facility on blocks of carbon-phenolic FM-5055. During these experiments, temperature and heating rates at various locations in the block, the aggregate mass loss, and char depth were found. A boundary condition for the heated surface was also measured to allow for numerical predictions of the experiments. The results of these experiments are discussed and are presented as a database with which numerical codes may be verified. Numerical predictions were made for these experiments using PEACH, a two-dimensional finite-difference code, and comparisons were drawn. The mass loss and char depth are shown to be under-predicted in all of the experiments. The temperature is shown to have poor agreement at locations in the block exposed to high heating rates (close to the heated surface) and good agreement at locations exposed to low heating rates (far from the heated surface). It is suggested that the part of the code modeling the kinetics of the pyrolysis process be re-evaluated

The nature of leukocytic response to mouse mammary tumor implants in C3H/HeJ mice with and without anticoagulation

Cancer is the second leading cause of death in the United States. The risk of cancer development and subsequent death from the disease increases sharply in the population over 55 years of age(1). Coagulation problems also increase with age and have been implicated in increasing the metastatic spread of cancer. Although cancer treatment has improved constantly it still remains quite toxic and improvement are needed Mouse mammary tumor is a common form of cancer used for experimental animal study. This investigation was designed to study the nature of leukocytic response to mouse mammary tumor implants in C3H/HeJ mice with and without anticoagulants. The main thrust of the research was in three areas: first, to develop a background in light microscope morphology of spontaneous mouse mammary tumor and its change with first and second passage into normal mice; second, to analyze change in leukocytic response in sham operated, tumor- and liver-implanted mice; and third, to analyze changes in leukocytic response to tumor implants with and without anticoagulation

Modeling the Learning of the Person Case Constraint

Many domains of linguistic research posit feature bundles as an explanation for various phenomena. Such hypotheses are often evaluated on their simplicity (or parsimony). We take a complementary approach. Specifically, we evaluate different hypotheses about the representation of person features in syntax on the basis of their implications for learning the Person Case Constraint (PCC). The PCC refers to a phenomenon where certain combinations of clitics (pronominal bound morphemes) are disallowed with ditransitive verbs. We compare a simple theory of the PCC, where person features are represented as atomic units, to a feature-based theory of the PCC, where person features are represented as feature bundles. We use Bayesian modeling to compare these theories, using data based on realistic proportions of clitic combinations from child-directed speech. We find that both theories can learn the target grammar given enough data, but that the feature-based theory requires significantly less data, suggesting that developmental trajectories could provide insight into syntactic representations in this domain

Inductive Power Transfer for Electric Vehicles Using Gallium Nitride Power Transistors

This chapter will present the application of the GaN Gate Injection Transistor (GIT) in Inductive Power Transfer (IPT) for Electric Vehicles (EV). IPT provides significant benefits over conventional plug-in chargers but suffers from lower efficiency. A high frequency inverter using GaN GIT, which has low on-resistance and gate charge, is implemented to reduce switching and conduction loss, resulting in higher efficiency. Different gate drive strategies will be compared for driving the GaN GIT at high slew rates while ensuring cross-conduction protection. The switching characteristics of the GaN GIT are studied and the inverter is designed to ensure low switching losses, while keeping overshoot and slew rates under control. Experiment results presented will demonstrate that the system efficiency peaks at 95% at 100 kHz operation and 92% at 250 kHz operation for a coil gap of 80 mm at 2 kW output power

¿Cartografía antigua o Cartografía histórica?

Los términos relacionados con la Historia de la Cartografía necesitan ser revisados, a tenor de las confusiones y ambigüedades que se vienen produciendo. Muchas publicaciones o catálogos de mapas utilizan el término cartografía histórica para definir su contenido, cuando debería utilizarse la expresión cartografía antigua, y la traducción literal de algunas expresiones tomadas de otros idiomas, arroja resultados poco afortunados. Las nuevas tecnologías han provocado un desarrollo y una difusión inusitados de la Cartografía, y su empuje afecta a la cartografía antigua. Los principales archivos y bibliotecas publican sus fondos con gran resolución y sus documentos pueden ser analizados con herramientas más ágiles y amigables, pero no abundan los estudios teóricos sobre su naturaleza u objetivos, ni existen propuestas para reformular las definiciones básicas vinculadas a la Historia de la Cartografía. Desde estas líneas se pretende analizar y debatir el vocabulario que afecta a esta disciplina, facilitando la tarea de aquellos que se acercan a los mapas antiguos

The acquisition and syntax of the passive in English

Children have been found to acquire passives of \u201cactional\u201d verbs prior to passives of \u201cnonactional\u201d verbs. This has come to be known as the Maratsos Effect (ME) and has been widely replicated (Sudhalter & Braine 1985, Gordon & Chafetz 1990, Fox & Grodzinsky 1998, Hirsch & Wexler 2006).I present two experiments that further investigate the ME. Researchers have not always been careful about using linguistic diagnostics for categorizing a verb as \u201cactional\u201d or \u201cnonactional\u201d. In the experiments reported here, verbs are split into three categories based on linguistic diagnostics for eventivity and agentivity. In Exp. 1, eventive agentive verbs (paint, fix, and wash) are tested against eventive nonagentive verbs (forget, find, and spot). In Exp. 2, the same eventive nonagentive verbs are tested against noneventive nonagentive verbs (hate, know, and love). I find evidence for a three-way distinction in the English- acquiring child\u2019s acquisition path, rather than the two-day distinction which has classically been reported as the ME. Children learn the passives of eventive agentive verbs before the passives of eventive nonagentive verbs, which are in turn learned before the passives of noneventive nonagentive verbs.I then explore possible accounts of this three-way distinction. I explore the intuition that children initially posit a structure for the eventive nonagentive verbs and the noneventive nonagentive verbs where both arguments of the eventive nonagentive and noneventive nonagentive verbs are projected internally to the VP. If one adopts Collins\u2019 (2005) analysis of the passive, then an account of the acquisition facts emerges on the basis of this intuition. However, this intuition cannot account for the facts if one adopts either Bruening\u2019s (2013) analysis of the passive or Legate\u2019s (2014) analysis of the passive.Thesis (M.A.)--Michigan State University. Linguistics, 2016Includes bibliographical references (pages 62-68

Gas injection in a liquid saturated porous medium. Influence of pressurization effects and liquid films

We study numerically and experimentally the displacement of a liquid by a gas in a two-dimensional model porous medium. In contrast with previous pore-network studies on drainage in porous media, the gas compressibility is fully taken account. The influence of the gas injection rate on the displacement pattern, breakthrough time and the evolution of the pressure in the gas phase due in part to gas compressibility are investigated. A good agreement is found between the simulations and the experiments as regards the invasion patterns. The agreement is also good on the drainage kinetics when the dynamic liquid films are taken into account

Propuesta de diseño de espesor de pavimento flexible utilizando dos metodologías para la avenida Dos de Mayo, Ucayali, 2021

El objetivo del presente proyecto de investigación es determinar una propuesta de diseño de espesor de pavimento flexible como una propuesta de pavimentación de la avenida dos de mayo utilizando dos metodologías, Ucayali, 2021. La metodología es de tipo aplicada, su diseño es pre experimental. Su enfoque es cuantitativo. La población de este trabajo de estudio es estudiar el número de cuadras totales de la avenida dos de mayo, Ucayali. La muestra es igual a la población. El procesamiento se realizó utilizando Microsoft Excel. Las conclusiones son que se realizó el diseño estructural del pavimento flexible utilizando la técnica AASHTO, obteniendo un resultado del estudio de trafico de trafico de un IMDA = 22,891 veh/día, con una carpeta asfáltica de 07 pulgadas y una base granular de 5 pulgadas y una subbase de 5 pulgadas. Y para el método del instituto del asfalto tenemos para un espesor para una base granular de 150 mm, el espesor de carpeta asfáltica de 11 cm y una base granular de 300 cm, le corresponde un espesor de carpeta asfáltica de 016.5 cm, así que se determinó la propuesta de diseño de espesor de pavimento flexible utilizando las dos metodologías

A Novel Role of Three Dimensional Graphene Foam to Prevent Heater Failure during Boiling

We report a novel boiling heat transfer (NBHT) in reduced graphene oxide (RGO) suspended in water (RGO colloid) near critical heat flux (CHF), which is traditionally the dangerous limitation of nucleate boiling heat transfer because of heater failure. When the heat flux reaches the maximum value (CHF) in RGO colloid pool boiling, the wall temperature increases gradually and slowly with an almost constant heat flux, contrary to the rapid wall temperature increase found during water pool boiling. The gained time by NBHT would provide the safer margin of the heat transfer and the amazing impact on the thermal system as the first report of graphene application. In addition, the CHF and boiling heat transfer performance also increase. This novel boiling phenomenon can effectively prevent heater failure because of the role played by the self-assembled three-dimensional foam-like graphene network (SFG).open2