Empirical Analysis of Optimization Methods for the Real-World Dial-a-Ride Problem

Author(s):  
Dilek Arıkan ◽  
Çetin Öztoprak ◽  
Sanem Sarıel
1973 ◽  
Vol 6 (4) ◽  
pp. 624-638 ◽  
Author(s):  
Robert R. Gilsdorf

To many political scientists the stuff of the discipline is supposed to be the delineation and comparison of power and influence relationships. Yet I doubt that we have really progressed very far in our empirical analysis of such phenomena; and indeed empirical studies, especially those conducted in the field, or in the “real” world, which have actually demonstrated influence relationships or tested formulations, seem to have lagged far behind the conceptual part of the enterprise. As one leading formulation puts it, one actor has influence over another actor in so far as he can change his behaviour (opinions, etc.) or get him to do something he would not otherwise do. Even to demonstrate that in any given setting certain actors have more influence and others less, let alone to explain the finding convincingly or to attempt comparisons with other settings, requires careful measurement of the motives, skills, and resources of both influencers and influencees. The requirements are very demanding, of course, and it is no wonder that empirical research has not been able to portray and explain the full reciprocal nature of influence relationships. The concession made to the conceptual and empirical difficulties of the problem seems to have been to examine only one of the actors, or half of the relationship; and in practice this seems to have worked out to be a concentration more on the influential than on the influenced. At times it seems that we have been enthralled simply by the thought of having discovered the influence-wielder, and that we have forgotten that there must also be others who are influence-recipients. As a hopeful correction to this one-sided treatment of influence relationships, and also simply to present some evidence on a topic that needs more documentation, my intention in this paper is to examine those influenced in local politics.


Author(s):  
Naman Goel ◽  
Cyril van Schreven ◽  
Aris Filos-Ratsikas ◽  
Boi Faltings

Blockchain based systems allow various kinds of financial transactions to be executed in a decentralized manner. However, these systems often rely on a trusted third party (oracle) to get correct information about the real-world events, which trigger the financial transactions. In this paper, we identify two biggest challenges in building decentralized, trustless and transparent oracles. The first challenge is acquiring correct information about the real-world events without relying on a trusted information provider. We show how a peer-consistency incentive mechanism can be used to acquire truthful information from an untrusted and self-interested crowd, even when the crowd has outside incentives to provide wrong informations. The second is a system design and implementation challenge. For the first time, we show how to implement a trustless and transparent oracle in Ethereum. We discuss various non-trivial issues that arise in implementing peer-consistency mechanisms in Ethereum, suggest several optimizations to reduce gas cost and provide empirical analysis.


2010 ◽  
Vol 20 (3) ◽  
pp. 100-105 ◽  
Author(s):  
Anne K. Bothe

This article presents some streamlined and intentionally oversimplified ideas about educating future communication disorders professionals to use some of the most basic principles of evidence-based practice. Working from a popular five-step approach, modifications are suggested that may make the ideas more accessible, and therefore more useful, for university faculty, other supervisors, and future professionals in speech-language pathology, audiology, and related fields.


2006 ◽  
Vol 40 (7) ◽  
pp. 47
Author(s):  
LEE SAVIO BEERS
Keyword(s):  

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