Marketing Social Change: A Comparative Historical and Methodological Analysis of Anti-Smoking Endeavors

Even though assessing social marketing endeavors proves to be challenging, evaluators can learn from previous campaigns and identify which facets of social marketing events, programs and campaigns need to be improved. Additionally, by analyzing social movements and evaluating how they connect to social marketing, we can gain a clearer view on ways to ameliorate the field of social marketing. As social marketing becomes increasingly sophisticated and similar to commercial marketing, there is hope that social marketing can yield higher rates of success in the future. Friend and Levy (2002) claimed that it was nearly impossible to compare social marketing endeavors using quantitative criteria and advocate the use of qualitative methods. However, if social marketing scholars developed a more systematic paradigm to assess events, programs and campaigns employing a combination of both quantitative and qualitative methods, then it would be easier to establish which social marketing efforts generated more success than others. When there are too many confounding variables, conclusions cannot always be drawn and evaluations may not be viewed as legitimate. As a result, critics become skeptical of social marketing’s value and both the importance and credibility of social marketing decline. With the establishment of proper criteria and evaluation methods, social marketing can progress and initiate more social change.

Interactions of Electrons and Rydberg Atoms in Ultra-Cold Plasmas

This thesis discusses an experimental technique for investigating electron temperature control by Rydberg atoms in ultra-cold plasmas. The objective we set ourselves was twofold. Firstly, we sought to gain an insight into the processes whereby the creation of Rydberg atoms within the plasma lengthens the lifetime of the plasma. To this end, we created the plasma using a Littman dye laser and subsequently, at a variable time delay, we excited neutral atoms in the plasma to specific Rydberg states using a narrow bandwidth pulsed dye laser. Secondly, we employed radio-frequency (rf) electric fields to excite electron oscillations within the plasma in order to infer such information as plasma density and electron temperature. Although we found that the introduction of high angular momentum Rydberg states did lengthen the plasma lifetime we were not able to differentiate between the temperature moderation effect due to the Rydberg atoms cooling the plasma, and the binding effect due to an increased positive space charge within the plasma.

An Injection-locked Diode Laser for Cold Rydberg Atom Experiments

A free-running, temperature stabilized diode laser has been injection-locked to an external cavity diode laser for use in cold Rydberg atom experiments. Cold rubidium atoms in a magneto-optical trap (MOT) are excited to Rydberg states using a 10 ns laser pulse. The Rydberg atoms spontaneously ionize due to dipole forces, and the collisional ionization dynamics are observed as a function of atom density and principal quantum number of the Rydberg state, n. The injection-locked diode laser will be used as a repumper in conjunction with a dark spontaneous-force optical trap (SPOT) to increase the Rydberg state density. We report on the design of the injection-locked laser system.