Dye infusion experiments into brain surrogates were conducted to quantify the volume of distribution as a function of infusion parameters and catheter configurations. A hollow membrane multi-port catheter was tested for dye distribution and reflux of the infusate. Its performance was compared to a simple single port catheter. The dye distribution pattern was more even in the hollow membrane cat...

The basic model argues that Digital Connections Scaling (DCS) of customers, providers and/or resources is a fundamental way to reduce service cycle time and transaction cost, and thereby to improve service quality and productivity. Digitisation makes entities connectable, and scaling decreases the marginal cost for the customer and the provider to cocreate new values. Three types of economies o...

background. this study evaluated the effect of two prophylaxis techniques on the marginal gap of ci v resin-modified glass-ionomer restorations. methods. standard cl v cavities were prepared on the buccal surfaces of 48 sound bovine mandibular incisors in this in vitro study. after restoration of the cavities with gc fuji ii lc resin-modified glass-ionomer, the samples were randomly assigned to...

In this paper, we present a micro estimate detennining taxable income as a function of gross income and all major deduction options depending on ho~sehold and asset categories. It is shown that tax savings strongly increase with ulcreasing income, resulting in a decreasing effective marginal tax rate for the highest income groups. We compute a lower bound on 1983 aggregate income tax losses' to...

Metric data of 6th century CE pigeons from the Negev Desert, Israel, are employed to test competing hypotheses on flock management strategies: that directed selection for size or shape took place under intensive management; or, alternatively, that stabilizing selection was a stronger determinant of size and shape under extensive management conditions. The results of the analysis support the sec...

Approximately 100,000 youths are currently incarcerated in the US, yet little is known whether such a penalty deters future crime or interrupts human capital formation in a way that increases the likelihood of later criminal behavior. This paper uses the incarceration tendency of randomly-assigned judges as an instrumental variable to estimate causal effects of juvenile incarceration on adult r...

In this paper we use micro data on both trade and production for a sample of large Chinese manufacturing …rms in the footwear industry from 2002-2006 to estimate an empirical model of export demand, pricing, and market participation by destination market. We use the model to construct indexes of …rm-level demand, marginal cost, and …xed cost. The empirical results indicate substantial …rm heter...

BACKGROUND Cervical lesions of anterior and posterior teeth are a common finding in routine dental practice. They are of much concern to the patient, if present in esthetically sensitive regions. Adhesive tooth-colored restorative materials are generally recommended for treating such lesions. The aim of the present study was to evaluate and compare the effect of various food media (lime juice, ...