The Effect of Social Crowdedness on Preference for Utilitarian Products

In a modern society with high population density, consumers usually face crowded consumption environment. Meanwhile, the choices they can make are more and more abundant. Is there any correlation between social crowdedness and the preference for different types of products? This research investigates whether social crowdedness, defined as the number of people in a given area—impacts consumers’ propensity to choose functional products rather than hedonic products. We propose that social crowdedness increases the likelihood of preference for functional products rather than hedonic products. This effect occurs because density settings make consumers experience a loss of perceived control, which in turn makes them engage in interpretive cognition, exhibit a desire for structured and meaningful products, and practical function of the product as a compensatory method to help them regain control. Two studies provide support for this hypothesis. Study 1 confirms the relationship between social crowdedness and the product type preference. Study 2 examined the mediating role of perceived control as the underlying mechanism, which is, social crowdedness gives rise to a feeling of loss of perceived control, to fill up this, consumers seek products with more practical and useful function feature rather than hedonic and pleasure-oriented products as compensation to fill the gap. This study expands the research in the fields of social crowdedness from consumer behavioral perspectives. Also, the research may contribute to the marketing planning of different types of commodities in various environments

Inhomogeneous Thermal Conductivity Enhances Thermoelectric Cooling

We theoretically investigate the enhancement of thermoelectric cooling performance in thermoelectric devices made of materials with inhomogeneous thermal conductivity, beyond the usual practice of enhancing thermoelectric figure of merit ZT. The dissipation of Joule heat in such thermoelectric devices is asymmetric which can give rise to better thermoelectric cooling performance. Although the thermoelectric figure of merit and the coefficient-of-performance are only slightly enhanced, both the maximum cooling power and the maximum cooling temperature difference can be enhanced significantly. This finding can be used to increase the heat absorption at the cold end. The asymmetric dissipation of Joule heat also leads to thermal rectification.Comment: 20 pages and 3 figure

Characterizing current noise of commercial constant-current sources by using of an optically-pumped rubidium atomic magnetometer

This paper introduces a method for characterizing the current noise of commercial constant-current sources(CCSs) using a free-induction-decay(FID) type optically-pumped rubidium atomic magnetometer driven by a radio-frequency(RF) magnetic field. We convert the sensitivity of the atomic magnetometer into the current noise of CCS by calibrating the coil constant. At the same time, the current noise characteristics of six typical commercial low-noise CCSs are compared. The current noise level of the KeySight Model B2961A is the lowest among the six tested CCSs, which is 36.233 0.022 nA / Hz1/2 at 1-25 Hz and 133.905 0.080 nA / Hz1/2 at 1-100 Hz respectively. The sensitivity of atomic magnetometer is dependent on the current noise level of the CCS. The CCS with low noise is of great significance for high-sensitivity atomic magnetometer. The research provides an important reference for promoting the development of high precision CCS, metrology and basic physics research.Comment: 7pages,7figure