The Relationship Among Life Style, Coping Strategies and Religiosity With General Health in Iranian Students

General health has been associated with many variables that from most important can be noted Life Style, Coping Strategies and Religiosity. This study examined the relationship between life style, coping strategies, religiosity and general health among Iranian students. This cross sectional study was conducted on 180 students 15-17 year olds who were selected via multi step cluster sampling method design from schools in the Varamin suburb, Iran in 2013. All students completed the questionnaires of life style, coping strategies, religiosity and general health and regression was used for data analyses. The statistical analysis revealed a positive relationship between life style, problem solving strategy and internal religiosity with general health (P<0.01) and a negative relationship between emotional coping strategy with general health (P<0.05). Life style, internal religiosity and problem-focused strategy predicted 32 percent of variance of general health and also share of life style in prediction general health was over of other variables. These results highlight the importance in considering life style at further understanding general health in students.DOI: http://dx.doi.org/10.11591/ijphs.v2i3.394

Periodic and Aperiodic Bunching in the Addition Spectra of Quantum Dot

We study electron addition spectra of quantum dots in a broad range of electron occupancies starting from the first electron. Spectra for dots containing <200 electrons reveal a surprising feature. Electron additions are not evenly spaced in gate voltage. Rather, they group into bunches. With increasing electron number the bunching evolves from occurring randomly to periodically at about every fifth electron. The periodicity of the bunching and features in electron tunneling rates suggest that the bunching is associated with electron additions into spatially distinct regions within the dots.Comment: 4 pages, 2 figures. Submitted to PR

Disorder and interaction induced pairing in the addition spectra of quantum dots

We have investigated numerically the electron addition spectra in quantum dots containing a small number (N < 11) of interacting electrons, in presence of strong disorder. For a short-range Coulomb repulsion, we find regimes in which two successive electrons enter the dot at very close values of the chemical potential. In the strongly correlated regime these close additions, or pairing, are associated with electrons tunneling into distinct electron puddles within the dot. We discuss the tunneling rates at pairing, and we argue that our results are related to a phenomenon known as "bunching", recently observed experimentally.Comment: 4 pages, 5 figure

Essays on Marketing Strategies in the Context of Interdependent Consumption

This dissertation consists of two essays in which I study the impact of two interdependent consumer behaviors, fairness concerns and exclusivity seeking, on a companys marketing strategies and profits specifically in a context where it tries to expand its clientele with the objective of generating repeat purchases, for example by running deals on daily deal platforms. In the first essay, I examine the impact of customers fairness concerns on the profitability of a company running promotions on daily deal platforms. With the prevalence of social media and the internet, information about such targeted promotions can become available to all consumers including those who did not have access to the platform and paid a full-price. Conducting a laboratory experiment, I demonstrate that knowledge about targeted promotions often leads to post-promotional fairness concerns among these consumers resulting in an increased tendency to switch providers. Incorporating the results of the experiment in a two-period game-theoretic model I analyze the impact of customers post-promotional fairness concerns on the profits of quality differentiated companies who compete by running targeted promotions. I find that the low quality provider always suffers from consumers sensitivity to unfairness. Contrary, I show that the high quality provider can counterintuitively benefit from consumers fairness concerns as long as its quality advantage is not too large. Furthermore, I analyze how profits are impacted when information about the targeted deals leaks to non-targeted customers who would have bought at the regular price. I find that, counterintuitively, competing firms profits increase with leakage. In the second essay of this dissertation, I start with the observation that many platform members are new customers and are uncertain about the quality of the companys product or service until they consume it. In such a context, I examine a high quality sellers optimal signaling strategy in a market where consumers prefer to purchase a scarce product due to desire for exclusivity or to receive a service in a non-crowded environment due to better experience and service delivery. Utilizing a repeat purchase signaling model I show that, consistent with prior literature, the high quality firm signals its quality by making its product scarce as well as charging a high price when consumers desire for exclusivity is high and cost of quality is great. Contrary, I also find conditions under which the high quality firm counterintuitively makes its product widely available and prices it low to signal its quality. The model may in part explain how high quality sellers market their products or services on daily deal websites

Topographic Mapping of the Quantum Hall Liquid using a Few-Electron Bubble

A scanning probe technique was used to obtain a high-resolution map of the random electrostatic potential inside the quantum Hall liquid. A sharp metal tip, scanned above a semiconductor surface, sensed charges in an embedded two-dimensional electron gas. Under quantum Hall effect conditions, applying a positive voltage to the tip locally enhanced the 2D electron density and created a ``bubble'' of electrons in an otherwise unoccupied Landau level. As the tip scanned along the sample surface, the bubble followed underneath. The tip sensed the motions of single electrons entering or leaving the bubble in response to changes in the local 2D electrostatic potential.Comment: 4 pages, 3 JPG figures, Revtex. For additional info and AVI movies, visit http://electron.mit.edu/st

Localization in Artificial Disorder - Two Coupled Quantum Dots

Using Single Electron Capacitance Spectroscopy, we study electron additions in quantum dots containing two potential minima separated by a shallow barrier. Analysis of addition spectra in magnetic field allows us to distinguish whether electrons are localized in either potential minimum or delocalized over the entire dot. We demonstrate that high magnetic field abruptly splits up a low-density droplet into two smaller fragments, each residing in a potential minimum. An unexplained cancellation of electron repulsion between electrons in these fragments gives rise to paired electron additions.Comment: submitted to Phys.Rev.Let