From the electric light to the automobile, history is filled with examples of new technologies that quickly change the way people live, conduct commerce, and run their governments. The modern computer will soon see its sixtieth birthday, and the telephone is even older. Why should such information technology still be driving fundamental change in our social institutions, including our methods o...

This is an examination of the significance of Gandhi's social philosophy for development. It is argued that, when seen in light of Gandhi's social philosophy, the concepts of appropriate technology (A. T.) and basic needs take on new meaning. The Gandhian approach can be identified with the original "basic needs" strategy for international development (Emmerij, 1981). Gandhi's approach helps to...

1 Graduate School of Information Science and Technology, Osaka University 1-5, Yamadaoka, Suita, Osaka, Japan Phone: +81-6-6879-4542, Fax: +81-6-6879-4544 E-mail: [email protected] 2 Graduate School of Information Science and Technology, Osaka University 1-5, Yamadaoka, Suita, Osaka, Japan Phone: +81-6-6879-4551, Fax: +81-6-6879-4554 E-mail: [email protected] 3 Graduate School o...

Do extreme values of daily-life gait characteristics provide more information about fall risk than median values? Abstract Background. Gait characteristics estimated from daily-life trunk accelerations reflect gait quality and are associated with fall incidence in older adults. While associations are based on median values of these gait characteristics, their extreme values may reflect either h...

This paper investigates the optimal taxation path of a non-renewable resource in the presence of an imperfect substitute renewable resource. We present an optimal growth model and characterize the social optimum and the decentralized equilibrium. We show that the economy gradually reduces the share of non-renewable resource and converges to a steady state in which it uses only the renewable res...

Systems for which each constant input gives rise to a unique globally attracting equilibrium are considered. A counterexample is provided to show that inputs which are only asymptotically constant may not result in states converging to equilibria (failure of the converging-input converging state, or “CICS” property).

A new method for eliminating parameter drift in parameter estimation problems is proposed. Existing methods for eliminating parameter drift work either on a limited time horizon, restricts the parameter estimates to a range that has to be determined a priori, or introduces bias in the parameter estimates which will degrade steady state performance. The idea of the new method is to apply leakage...

In this paper we consider a two-echelon supply chain system consisting of a supplier and a retailer. The supplier has an inventory system and a service unit to process the orders received from the retailer. Demands arrive to the retailer according to a Poisson process. Both supplier and retailer apply one-for-one ordering policy. The supplier’s lead time and the service time of his service unit...

____________________________________________________________ I study a version of the Lagos-Wright (2003) model of monetary exchange in which buyers have private information about their tastes and sellers make take-it-or-leave-it-offers (i.e., have the power to set prices and quantities). The introduction of imperfect information makes the existence of monetary equilibrium a more robust feature...

This paper considers a single-echelon, continuous review, inventory system with a warehouse facing compound Poisson customer demand. The replenishment lead-time is constant. Demand that cannot be met directly is backordered. There are standard linear holding and backorder costs but no set-up or ordering cost. It is assumed that the demand process starts at a certain given time. Consequently, be...