We consider transmission policies for multiple users sharing a single wireless link to a base station. The noise, and hence the probability of correct transmission of a packet, depends on the state of the user receiving the packet. The state for each user is independent of the states of the other users and changes according to a two-state (good/bad) Markov chain. The state of a user is observed...

To analyze the components of young Chinese eyes with special attention to differences in corneal power, anterior segment length and lens power. Cycloplegic refractions and ocular biometry with LENSTAR were used to calculate lens power with Bennett's method. Mean refraction and mean values for the ocular components of five different refractive groups were studied with ANOVA and post-hoc Scheffé ...

We formulate the first model of allocation scheduling for emergency and elective surgeries in a dynamic environment, where distributional information about demand and resource availability is continually updated and scheduling decisions exploit new information as it arises. We allow multiple resources to be considered, and patients to renege if they are made to wait for too long. We prove that ...

Given the rapid advances in unmanned aerial vehicles, or drones, and increasing need to monitor at a city level, one of the current research gaps is how to systematically deploy drones over multiple periods. We propose a real-time data-driven approach: we formulate the first deterministic arc-inventory routing problem and derive its stochastic dynamic policy. The policy is expected to be of gre...

This paper studies two-party electoral competition in a setting where 1 no policy is unbeatable. It is shown that if parties take turns in choosing policy 2 platforms and observe eachother’s choices, for one party to change position so 3 as to win is pointless since the other party never accepts an outcome where it is 4 sure to loose. If there is any cost to changing platform, the prediction is...

AIM To evaluate histomorphometrically the optic nerve head in highly myopic eyes with absolute secondary angle closure glaucoma. METHODS Optic disc sections of 16 highly myopic eyes with an axial length of more than 26 mm and of 19 eyes with an axial length of less than 26 mm were histomorphometrically evaluated. All eyes had been enucleated due to painful absolute secondary angle closure gla...

We have carried out a number of different studies in chicks to examine the relationship between choroidal blood flow and myopic eye growth, and between accommodation and myopic eye growth. Our studies on choroidal blood flow show that myopic eye growth produced by form vision degradation leads to dramatic reductions in choroidal blood flow. These reductions appear directly attributable to the e...

This paper studies the optimal linear pension scheme when society consists of rational and myopic individuals. Myopic individuals have, ex ante, a strong preference for the present even though, ex post, they would regret not to have saved enough. While rational and myopic persons share the same ex post intertemporal preferences, only the rational agents make their savings decisions according to...