Many product development methodologies strategically allocate resources to create a portfolio of technology projects. These methodologies work well for projects that are predominantly independent of one another and occur in a common funding cycle. When the projects become interdependent, the complexity of optimizing even a moderate number of projects over a small number of objectives and constr...

Within the archaeology domain, datasets frequently refer to time periods using a variety of textual or numeric formats. Traditionally controlled vocabularies of time periods have used classification notation and the collocation of terms in the printed form to represent and convey tacit information about the relative order of concepts. The emergence of the semantic web entails encoding this know...

I decision making under risk involves two dimensions: time preferences and risk preferences. This paper focuses on the impact of time on risk preferences, independent of the intertemporal trade-off of outcomes, i.e., time preferences. It reports the results of an experimental study that examines how delayed resolution and payment of risky options influence individual choice. We used a simple ex...

The productivity change of a decision making unit (DMU) between two time periods can be evaluated by the Malmquist productivity index. In this study, we propose a method to compute the Malmquist productivity index in several time periods (from the first to the last periods) on interval data in data envelopment analysis (DEA). Then, the obtained Malmquist productivity index is compared with Malm...

In this, the second of a two-part paper, the analysis of the apparent frequency of a seven-story reinforced-concrete hotel building in Van Nuys, Calif., is extended to consider its time-dependent changes, both short and long term. The instantaneous apparent frequency is measured by two methods: windowed Fourier analysis and zero-crossings analysis. The results show that it changes from earthqua...

We present empirical evidence on acquirer firms that have violated or are about to violate a loan covenant within four quarters of undergoing an acquisition. We find that firms that violate a covenant within the four quarters before the acquisition announcement have the highest announcement period abnormal returns, while firms that violate a covenant within the four quarters after the acquisiti...

OBJECTIVE This meta-analysis reviews rates of progression of diabetic retinopathy to proliferative diabetic retinopathy (PDR) and/or severe visual loss (SVL) and temporal trends. RESEARCH DESIGN AND METHODS This systematic literature review and meta-analysis of prospective studies assesses progression of retinopathy among diabetic patients without treatment for retinopathy at baseline. Studie...

Sound production, Seasonal isolation, Overwintering, Aquatic insects The water boatmen Corixa dentipes and C. punctata produce an acoustic mounting signal when beginning to copulate. Automated recording o f this signal over the entire life cycle of the animals reveals that the main mating period of C. punctata occurs in autumn and that o f C. dentipes, in the spring. In the case o f C. punctata...