33 research outputs found
The Business Model: Recent Developments and Future Research
This article provides a broad and multifaceted review of the received literature on business models in which the authors examine the business model concept through multiple subject-matter lenses. The review reveals that scholars do not agree on what a business model is and that the literature is developing largely in silos, according to the phenomena of interest of the respective researchers. However, the authors also found emerging common themes among scholars of business models. Specifically, (1) the business model is emerging as a new unit of analysis; (2) business models emphasize a system-level, holistic approach to explaining how firms “do business”; (3) firm activities play an important role in the various conceptualizations of business models that have been proposed; and (4) business models seek to explain how value is created, not just how it is captured. These emerging themes could serve as catalysts for a more unified study of business models
Spin relaxation of excitons in strained InGaAs/GaAs quantum wells
We have investigated the exciton spin dynamics in strained InxGa1-x As/GaAs (x ≤ 0.2) quantum wells. The variation of the initial polarization with the excitation energy is well correlated with the increasing mixing of the valence band states. The time behavior of the depolarization curves clearly demonstrates the prime importance of the hole and exciton spin relaxation processes