Results 91 to 100 of about 6,830,035 (189)

On the Problem of Disorders in the Formation of Hard Dental Tissues and Teeth Eruption

open access: yes, 2010
The paper deals with the problem of hypoplastic and hypomineralization changes of tooth enamel in permanent teeth. Localized defects in hard of tissues of permanent teeth may originate on the basis of periapical dental tissues inflammatory lesions in ...
V. Merglová
core   +1 more source

An identification scheme based on bivariate function hard problem

open access: yes, 2014
Recently, an identification scheme based on Diophantine Equation Hard Problem is proposed. The scheme was proven secure against impersonation under passive attack, assuming that solving Diophantine Equation Hard Problem is hard.
Kamel Ariffin, Muhammad Rezal   +1 more
core   +1 more source

On the Hardness of the Drone Delivery Problem

open access: yes
Fast shipping and efficient routing are key problems of modern logistics. Building on previous studies that address package delivery from a source node to a destination within a graph using multiple agents (such as vehicles, drones, and ships), we investigate the complexity of this problem in specialized graphs and with restricted agent types, both ...
Simon Bartlmae, Andreas Hene, Kelin Luo
openaire   +4 more sources

Sequential Memetic Algorithm Optimization for Allocation Planning in Hostelry Establishments

open access: yesApplied Sciences
Hostelry establishments face the challenge of devising a table and chair allocation for accommodating their customers on a daily basis. This problem scales significantly with the introduction of constraints, such as scenario obstacles or the requirement ...
Rubén Ferrero-Guillén   +3 more
doaj   +1 more source

The hard problem is the problem

open access: yes
David Chalmers’ 'hard problem' of consciousness—how subjective experience arises from physical processes—has dominated philosophy of mind for decades. This paper argues that the hard problem is not a problem at all, but a category error—a confusion between classical and second-order cybernetic questions.
openaire   +2 more sources

Implementing Problem Based Learning: Why is it so hard?

open access: yesRed U, 2011
El artículo pretende proporcionar claves para responder a la pregunta formulada en el título. Tras contextualizar el propósito de su análisis, el autor concluye que la pregunta puede formularse en tres niveles diferentes: el ...
Peter A.J. Bouhuijs
doaj  

On the Complexity of the Highway Pricing Problem [PDF]

open access: yes
The highway pricing problem asks for prices to be determined for segments of a single highway such as to maximize the revenue obtainable from a given set of customers with known valuations. The problem is (weakly) NP-hard and a recent quasi-PTAS suggests
Uetz, Marc   +2 more
core  

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