5,417 research outputs found
Mate Preferences Among Young People: US and China.
Mate preferences expressed by college students may reflect both the societyâs traditional beliefs and the changing nature of cultural values. The current study compared American and Chinese college studentsâ responses on mate preference choices (N=545). Results show both similarities and differences in mate preferences between these two groups. Out of 18 characteristics, the two groups were similar in eight and differed in ten; and out of 13 rank order ratings, the two groups differed significantly on ten items. Overall, these findings suggest that while there is evidence of convergence in American and Chinese college studentsâ mate preference values, reflecting the effect of globalization, there are also significant differences in their choices, reflecting social and cultural values of each individual countr
Exploring the Land of Dracula: Personal Reflections on the Romanian Experience
In this article I reflect on my learning experiences with Kennesaw State Universityâs Year of Romania Faculty Development Community. The yearlong program, including a two-week trip to Romania, contributed a great deal to my professional and personal growth. I have since incorporated Romanian contents into my cross-cultural psychology class to enhance the studentâs learning experience. In observing contemporary Romanian society, I make references to China and briefly discuss similarities and differences during each countryâs transition to a market economy
Research on thermal deformation constitutive model of 304 stainless steel based on travel insulation cup metal material
In order to improve the quality of people âs travel and improve the performance of travel insulation cup, the thermal deformation behavior of 304 stainless steel, the edible grade material of travel insulation cup, was studied by Gleeble- 3800 thermal / mechanical simulation machine. The true stress-strain curve of 304 stainless steel was obtained by hot compression test with deformation temperature of 800~1 100 °C and strain rate range of 0,001 ~ 1 s-1. According to the real stress-strain curve, the Arrhenius constitutive model of 304 stainless steel was constructed. The results show that the flow stress of 304 stainless steel increases with the increase of deformation temperature and strain rate. The theoretical stress value predicted by the constitutive model is fitted with the experimental results, and the correlation is 0,995, indicating that the model has high prediction accuracy
Reactive transport with wellbore storages in a single-well pushâpull test
Using the single-well
pushâpull (SWPP) test to determine the in situ biogeochemical reaction
kinetics, a chase phase and a rest phase were recommended to increase the
duration of reaction, besides the injection and extraction phases. In this
study, we presented multi-species reactive models of the four-phase SWPP test
considering the wellbore storages for both groundwater flow and solute
transport and a finite aquifer hydraulic diffusivity, which were ignored in
previous studies. The models of the wellbore storage for solute transport
were proposed based on the mass balance, and the sensitivity analysis and
uniqueness analysis were employed to investigate the assumptions used in
previous studies on the parameter estimation. The results showed that
ignoring it might produce great errors in the SWPP test. In the injection and
chase phases, the influence of the wellbore storage increased with the
decreasing aquifer hydraulic diffusivity. The peak values of the breakthrough
curves (BTCs) increased with the increasing aquifer hydraulic diffusivity in
the extraction phase, and the arrival time of the peak value became shorter
with a greater aquifer hydraulic diffusivity. Meanwhile, the Robin condition
performed well at the rest phase only when the chase concentration was zero
and the solute in the injection phase was completely flushed out of the
borehole into the aquifer. The Danckwerts condition was better than the Robin
condition even when the chase concentration was not zero. The reaction
parameters could be determined by directly best fitting the observed data
when the nonlinear reactions were described by piece-wise linear functions,
while such an approach might not work if one attempted to use nonlinear
functions to describe such nonlinear reactions. The field application
demonstrated that the new model of this study performed well in interpreting
BTCs of a SWPP test.</p
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On defining partition entropy by inequalities
Partition entropy is the numerical metric of uncertainty within
a partition of a finite set, while conditional entropy measures the degree of
difficulty in predicting a decision partition when a condition partition is
provided. Since two direct methods exist for defining conditional entropy
based on its partition entropy, the inequality postulates of monotonicity,
which conditional entropy satisfies, are actually additional constraints on
its entropy. Thus, in this paper partition entropy is defined as a function
of probability distribution, satisfying all the inequalities of not only partition
entropy itself but also its conditional counterpart. These inequality
postulates formalize the intuitive understandings of uncertainty contained
in partitions of finite sets.We study the relationships between these inequalities,
and reduce the redundancies among them. According to two different
definitions of conditional entropy from its partition entropy, the convenient
and unified checking conditions for any partition entropy are presented, respectively.
These properties generalize and illuminate the common nature
of all partition entropies
Forchheimer flow to a well-considering time-dependent critical radius
Previous studies on the non-Darcian flow into a pumping well assumed that
critical radius (RCD) was a constant or infinity, where RCD
represents the location of the interface between the non-Darcian flow region
and Darcian flow region. In this study, a two-region model considering
time-dependent RCD was established, where the non-Darcian flow was
described by the Forchheimer equation. A new iteration method was proposed
to estimate RCD based on the finite-difference method. The results
showed that RCD increased with time until reaching the quasi steady-state flow, and the asymptotic value of RCD only depended on the
critical specific discharge beyond which flow became non-Darcian. A larger
inertial force would reduce the change rate of RCD with time, and
resulted in a smaller RCD at a specific time during the transient flow.
The difference between the new solution and previous solutions were obvious
in the early pumping stage. The new solution agreed very well with the
solution of the previous two-region model with a constant RCD under
quasi steady flow. It agreed with the solution of the fully Darcian flow
model in the Darcian flow region
Effect of Suspension Freeze-concentration Technology on the Quality of Wine
One of the factors that inhibits the development of the Chinese wine industry is that the sugar content ofthe grape feedstock is insufficient. In order to produce wine with better qualities using these materials,concentrating the grape juice could be a good alternative to adding sugars. In this study, suspension freezeconcentrationtechnology was applied to concentrating grape juice with a low sugar content. The freezeconcentratedgrape juice was made into red and white wines separately. In the control group, red andwhite wines were made from chaptalized (sugar-enriched) grape juice. The physical and chemical indexes,sensory evaluation results and polyphenolic content of the wine were analysed to evaluate the practicalityof applying the freeze-concentration technology in the wine industry. The results show that, after removingice every 30 min for approximately 14 h with a -18°C coolant, grape juice with an initial sugar content of14°Brix reached 23°Brix. Both the red wines and white wines made from freeze-concentrated grape juicewere of a higher quality than the wines made from chaptalised grape juice. Moreover, the phenolic contentwas concentrated, which may provide health benefits. Thus, suspension freeze-concentration technology isa promising alternative to traditional chaptalisation technology
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