scholarly journals Jovian seismology

1994 ◽  
Vol 147 ◽  
pp. 481-511
Author(s):  
Benoît Mosser
Keyword(s):  
High Pressure ◽  
Internal Structure ◽  
Low Temperatures ◽  
High Pressures ◽  
Giant Planets ◽  
The Other ◽  
Interior Structure ◽  
Theoretical Approaches ◽  
Thermodynamical Laws ◽  
The Relationship

AbstractThis paper reviews a new astrophysical subject: seismology of the giant planets. Seismology is dedicated to the sounding of the interior structure of any object; on the other hand, the interiors of the Jovian planets need to be constrained, in order to improve our knowledge of their structure and of their evolution, as well as the thermodynamical laws involved at high pressures and low temperatures. The relationship between Jovian seismology and, first, Jovian internal structure, and second, high pressure physics, is examined, in order to determine the task of “dioseismology”† in the next years. We present then the seismological theoretical approaches developped since the pionnering work of Vorontsov et al. (1976), who calculated the frequencies of the Jovian eigenmodes. We report the first observational attempts for the detection of the oscillations of Jupiter. We discuss the observational results and examine what can be done in the future.

Processing Relationships Between Language-Being-Spoken and Other Speech Dimensions in Monolingual and Bilingual Listeners

2016 ◽  
Vol 60 (4) ◽  
pp. 530-561
Author(s):  
Charlotte R. Vaughn ◽  
Ann R. Bradlow
Keyword(s):  
Internal Structure ◽  
Mandarin Chinese ◽  
Language Processing ◽  
The Other ◽  
Speech Features ◽  
The Relationship ◽  
Speeded Classification

While indexical information is implicated in many levels of language processing, little is known about the internal structure of the system of indexical dimensions, particularly in bilinguals. A series of three experiments using the speeded classification paradigm investigated the relationship between various indexical and non-linguistic dimensions of speech in processing. Namely, we compared the relationship between a lesser-studied indexical dimension relevant to bilinguals, which language is being spoken (in these experiments, either Mandarin Chinese or English), with: talker identity (Experiment 1), talker gender (Experiment 2), and amplitude of speech (Experiment 3). Results demonstrate that language-being-spoken is integrated in processing with each of the other dimensions tested, and that these processing dependencies seem to be independent of listeners’ bilingual status or experience with the languages tested. Moreover, the data reveal processing interference asymmetries, suggesting a processing hierarchy for indexical, non-linguistic speech features.

Some high-pressure pyroxenes

1974 ◽  
Vol 39 (307) ◽  
pp. 768-787 ◽  
Author(s):  
R. N. Thompson
Keyword(s):  
High Pressure ◽  
Alkali Basalt ◽  
High Pressures ◽  
Major Element ◽  
Distribution Coefficients ◽  
The Other ◽  
Strong Negative Correlation ◽  
Complex Behaviour ◽  
Complex Variation ◽  
Bulk Chemistry

SummaryMicroprobe analyses of Ca-rich pyroxenes crystallized in the melting ranges of a magnesian alkali basalt, a transitional basalt, an olivine tholeiite, a tholeiitic andesite, and an augite leucitite at pressures between 8 and 45 kb show complex variation. Ca-poor pyroxene precipitated only from the alkali basalt at pressures between 14 and 18 kb. Pyroxene falling near the Di-Hed join in the pyroxene quadilateral formed at all pressures and temperatures from the leucitite, whereas ‘Ca-rich’ pyroxene crystallizing from the other four compositions was Ca-poor augite to sub-calcic augite. The liquidus Ca-rich pyroxenes all show rising Al and Na and falling Ti with increasing pressure and temperature. Other elements show complex behaviour; all but the leucitite pyroxenes tend to make temporary excursions of solid solution towards Ca-poor pyroxene at intermediate pressures, returning to more Ca-rich compositions at high pressures. At sub-liquidus temperatures Na and Ti consistently rise with falling T at constant P and also with rising P at constant T in these pyroxenes. The behaviour of the other elements in these circumstances depends on the nature of the coexisting phases.Fe/Mg distribution between Ca-rich pyroxene and liquid, in the form has a constant value of 0.29 for three separate bulk compositions at widely differing temperatures and pressures. Distribution coefficients for Mg and Fe between pyroxenes and coexisting garnets at high pressures are very similar to those found in garnet pyroxenite xenoliths from Oahu, Hawaii. Systematic shifts in the apparent stoichiometry (all Fe taken as Fe2+) of the augite leucitite pyroxenes are thought to indicate that they have considerable Fe3+ contents at low pressure, decreasing as P rises. If so, they show a strong negative correlation between Na and Fe3+, which negates the customary practice of forming acmite before jadeite component when recalculating the analyses of high-pressure pyroxenes.The sets of pyroxenes crystallized from each composition show consistent trends when plotted on such diagrams as jadeite vs Ca-Tschermak's ‘molecule’, which have often been used in attempts to discriminate natural pyroxenes formed in differing P-T environments. However, these new data show clearly that the bulk chemistry of the magma has a predominating influence on the composition of the pyroxenes crystallizing from it. Unless it is certain that a suite of natural pyroxenes have all precipitated from the same magma, it is probably pointless to attempt to deduce the relative P-T conditions of their formation from their major element chemistry.

Materials Research at University of Nevada, Las Vegas

2016 ◽  
Vol 879 ◽  
pp. 386-389
Author(s):  
Ravhi S. Kumar ◽  
Weldu Gabrimicael ◽  
Andrew L. Cornelius
Keyword(s):  
High Pressure ◽  
Interdisciplinary Research ◽  
High Pressures ◽  
Las Vegas ◽  
Science And Engineering ◽  
High Pressure Studies ◽  
Materials Research ◽  
Potential Applications ◽  
Indirect Band Gap ◽  
The Relationship

High-pressure studies on thermoelectric materials allow the study of the relationship between structural, elastic, and electronic properties. The High Pressure Science and Engineering Center (HiPSEC) at UNLV performs interdisciplinary research on a wide variety of materials at high pressures. One such system, CrSi2 is an indirect band gap semiconductor that has potential applications in solar cells.

scholarly journals E-mentoring entre Professores e Alunos na EaD: um Estudo de Caso na Graduação em Administração de uma Instituição Pública Federal

EAD em FOCO ◽  
2016 ◽  
Vol 6 (3) ◽  
Author(s):  
Marcella Arianna Pinto de Oliveira ◽  
Sílvio Luiz de Paula ◽  
José Ricardo Costa de Mendonça ◽  
Andrezza Marianna Pinto de Oliveira
Keyword(s):  
Business Administration ◽  
The Other ◽  
Face To Face ◽  
Mentoring Relationship ◽  
Theoretical Approaches ◽  
Online Tools ◽  
Analysis Theory ◽  
E Learning ◽  
The Relationship

Busca-se neste trabalho sobre Educação a Distância compreender como se configuram as relações de e-mentoring entre professores e alunos no curso de graduação em Administração a distância oferecido por uma instituição pública federal brasileira. Como arcabouço teórico aborda-se o conceito de mentoria, suas características, funções e fases. Aborda-se ainda e-mentoring e Educação a Distância com suas características e relações. Realizou-se um estudo de caso; as técnicas de coleta foram entrevistas online com professores/alunos, observação não participante e análise documental, estudando-se os dados por meio de análise de conteúdo. Os resultados indicam que as relações de mentoria estabelecidas entre tutores e alunos configuram-se como e-mentoring, já que os tutores são mais acessíveis aos alunos e mantêm uma comunicação mais frequente, tanto por meio de diversas ferramentas de comunicação quanto por meio de encontros presenciais, além de fornecer apoio profissional e pessoal aos alunos. Já a relação estabelecida entre professores e alunos se configura como um outro tipo de relação, que não é de mentoria, pois as características não se enquadram nos conceitos desse construto.Palavras-chave: Educação, Educação a Distância (EAD), Ensino superior, Mentoria, E-mentoring. E-mentoring among Professors and Students on E-learning: This Case Study is about a Degree Course of Business Administration at Public InstitutionAbstractIn this research about e-learning, we try to understand how the e-mentoring relationship among Tutors and Students works in a Business Administration course offered at distance by a public Brazilian institution. As theoretical approaches, it is observed the concept of mentoring, its features, functions and phases. It also covers e-mentoring and distance education with its characteristics and relationships. A case study was made, the data collection techniques were an online interview with tutors/students, non-participative observation and documental analysis on content analysis theory. The results demonstrate that the mentoring relationship between Tutors and Students can be defined as e-mentoring: they are accessible to the students and keep intense communication on face-to-face meetings and also by the online tools provided on the course platform. On the other hand, the relationship established by Tutors and Students cannot be defined by e-mentoring due to lack of connections on the e-learning concepts.Keywords: Education, E-learning, Graduation degree, Mentoring, E-mentoring.

ULTRASONIC PROPAGATION IN SOLENHOFEN LIMESTONE AT HIGH PRESSURES

Geophysics ◽  
1978 ◽  
Vol 43 (5) ◽  
pp. 1014-1017
Author(s):  
I. J. Fritz
Keyword(s):  
High Pressure ◽  
Wave Propagation ◽  
Phase Transitions ◽  
Seismic Waves ◽  
High Pressures ◽  
Sound Propagation ◽  
Wave Measurements ◽  
Ultrasonic Propagation ◽  
Propagation Properties ◽  
The Relationship

The measurement of ultrasonic velocities at high pressure in minerals and rocks provides information pertinent to a variety of geophysical and engineering problems such as those of determining the state of matter in the earth's interior, understanding the propagation of seismic waves, and characterizing mechanical behavior of materials that are important in mining technology. In recent years there have been a number of reported high pressure sound velocity measurements in various kinds of limestone. (A concise review of this work can be found in a recent paper by Singh and Kennedy, 1974.) Such measurements continue to be of interest because of the relationship to shock‐wave propagation properties (Grady et al, 1977). From the previous measurements it has been found that the phase transitions in calcite, which is the main constituent of limestone, strongly influence the sound velocities. The phase transitions in pure calcite occur at 14.5 kbar (calcite I–II) and 17.4 kbar (calcite II–III) (Singh and Kennedy, 1974); however, because the transitions may be shifted in pressure and spread out over a range of pressures in a rock, it is necessary to make measurements to pressures in excess of 20 kbar in order to characterize the effects of the transitions. To date there has been only one experimental study of the effect of the II–III transition on sound propagation, namely the longitudinal wave measurements in Oak Hall limestone made by Wang and Meltzer (1973). In order to further characterize the effect of the II–III transition on sound propagation in limestone, we have made measurements to 25 kbar on Solenhofen limestone. We were able to measure both longitudinal and transverse velocities over the full pressure range; thus, our measurements represent the first study of the effect of the II–III transition on shear wave propagation under conditions of hydro static pressure.

High-Pressure Gear Pumps

1946 ◽  
Vol 155 (1) ◽  
pp. 417-452 ◽  
Author(s):  
T. E. Beacham
Keyword(s):  
High Pressure ◽  
High Pressures ◽  
Journal Bearings ◽  
Volumetric Efficiency ◽  
Solid Matter ◽  
Excessive Pressure ◽  
Low Viscosity ◽  
Large Numbers ◽  
Gear Pumps ◽  
The Relationship

Gear pumps have been used in very large numbers for the various hydraulic services of war aircraft. For the higher pressures the main problems have been in connexion with the load on the journal bearings, with wear, and with the reduction in volumetric efficiency caused by internal leakage. The journal loads are affected by the number of teeth and by the ratio of width to diameter of the gears. With high pressures it is difficult to accommodate standard ball or roller races on account of their diameter: designs are illustrated using a combination of standard races and special needle roller bearings. Small amounts of wear cause comparatively large reductions in volumetric efficiency. Major causes of wear are rubbing on the gear end faces and solid matter in suspension in the liquid and methods of dealing with these are discussed. The percentage slip due to internal leakage varies inversely as the factor (r.p.m. × viscosity). At low speeds and with low-viscosity liquids, internal leakage often limits the pressure at which the pump can be used. Multistage pumps reduce the leakage and have been used extensively for undercarriage operation. Internal leakage becomes relatively less as the size of the pump is increased and the paper gives a graph, showing the relationship between the limit of pressure at which 80 per cent volumetric efficiency is possible, the capacity and rotational speed of the pump, and the viscosity of the liquid. Aircraft pumps generally use gears with involute teeth: ports in the end covers of the casing are used to prevent excessive pressure in the liquid trapped between the teeth. Low- and high-leakage conditions call for difficult arrangements of ports, and this involves differing displacements and variations in flow velocity.

Absolute Viscosity of Air down to Cryogenic Temperatures and up to High Pressures

1973 ◽  
Vol 15 (4) ◽  
pp. 266-270 ◽  
Author(s):  
B. Latto ◽  
M. W. Saunders
Keyword(s):  
Experimental Data ◽  
High Pressure ◽  
Atmospheric Pressure ◽  
High Pressures ◽  
The Other ◽  
Cryogenic Temperatures ◽  
Temperature Range ◽  
Absolute Viscosity ◽  
Correlating Equations ◽  
Better Than

The absolute viscosity of gaseous air was determined experimentally for the general pressure and temperature range 100–15 000 kPa and 90–400 K respectively, using a series capillary transpiration-type viscometer which has been developed by the authors. The accuracy of the experimental data is believed to be better than ± 1 per cent. Two general correlating equations, one for atmospheric pressure and the other for medium high pressure (i.e., densities up to 400 kg/m3), have been obtained.

The Interplay of Social Status and Trust: A Critical Review of Concepts, Operationalizations, and Findings

2021 ◽  
Vol 25 (2) ◽  
pp. 203-220
Author(s):  
Carolina Dahlhaus ◽  
Thomas Schlösser
Keyword(s):  
Socioeconomic Status ◽  
Social Status ◽  
Negative Correlation ◽  
The Other ◽  
Systematic Analysis ◽  
Theoretical Approaches ◽  
The Social ◽  
Study Results ◽  
Positive Correlations ◽  
The Relationship

This review examines the relationship between a person’s social status and trust. Previous research has yielded differing results. On one hand, studies have repeatedly found positive correlations of different strengths between social status and trust; that is, persons with higher social status trust more than persons with lower social status. On the other hand, empirical evidence has also suggested a negative correlation between social status and trust; that is, persons with lower social status trust more than persons with higher social status. In addition to a systematic analysis of the various theoretical approaches and the respective study results, possible causes for these diverging empirical findings are discussed. With regard to the relationship between socioeconomic status and generalized trust, all studies reviewed show a positive correlation. Contradictory results can be found only in studies that investigated socioeconomic status and trust, measured as behavior. In addition to the different operationalizations of social status and trust, one potential cause for different results may be found in the fact that in experimental settings, the social status of the interaction partner is often known.

scholarly journals Doğrudan Yabancı Sermaye Yatırımları ileGelir Eşitsizliği İlişkisi: Literatür İncelemesi

2021 ◽  
Vol 3 (1) ◽  
pp. 46-64
Author(s):  
Yeter Kaplan ◽  
Munise Tuba Aktaş
Keyword(s):  
Foreign Direct Investment ◽  
Income Inequality ◽  
Literature Review ◽  
Empirical Study ◽  
Wage Inequality ◽  
Direct Investment ◽  
The Other ◽  
Theoretical Approaches ◽  
To Come ◽  
The Relationship

In the literature, it is possible to come across studies examining the effect of foreign direct investment (FDI) on income inequality. In this study, a literature review has been conducted in order to better consideration the effect of FDI on income inequality. In this context, the main purpose of the study is to reveal the effect of FDI on income inequality within the framework of theoretical approaches based on empirical study findings. In addition, the study aims to contribute to the debates on the effects of foreign direct investment on income inequality. The findings of the studies on the relationship between FDI and income inequality shows differences. In some of the studies examined, there are findings supporting that FDI increases income and wage inequality. On the other hand, some other studies have found evidences that FDI reduces income inequality. Otherwise, there are also studies showing that FDI does not have a significant effect on income inequality.

Charge density wave, superconductivity, and non-metallic behaviour under high pressure in ZrTe3

2002 ◽  
Vol 12 (9) ◽  
pp. 97-98
Author(s):  
K. Igarashi ◽  
S. Yasuzuka ◽  
K. Inagaki ◽  
S. Tanda ◽  
Y. Okajima ◽  
...  
Keyword(s):  
High Pressure ◽  
Fermi Surface ◽  
Charge Density ◽  
Charge Density Wave ◽  
High Pressures ◽  
Density Wave ◽  
Metallic State ◽  
Resistivity Measurements ◽  
Low Dimensional ◽  
The Relationship

The charge-density-wave (CDW) order of low-dimensional inorganic conductor ZrTe3 is found to increase with increasing pressure, while the superconductivity with filamentary nature is significantly suppressed. It was evidenced in resistivity measurements under pressure up to 0.8 Cpa. The present results suggest that competition between the superconductivity and the CDW is not simply explained by a nesting effect of the Fermi surface, but other origin is needed. Non-metallic behaviour is also found below 4 K under high pressures above 0.6 Gpa. The relationship between the non-metallic state and the pressure-enhanced CDW is expected, although yet inexplicable.

Sign in / Sign up

Export Citation Format

Share Document