Trilateral retinoblastoma (TRb) is a rare combination of unilateral or bilateral retinoblastoma with an ectopic midline intracranial neuroblastic neoplasm (primitive neuroectodermal tumour) usually in the area of pineal gland or sellar region. TRb can occur with both familial and sporadic forms of retinoblastoma. An occurrence of this rare tumour in a 12-year-old boy who had unilateral retinobl...

Trilateral diplomacy is a common format of interaction in international relations, which forms various configurations the balance power within framework triangles. The concept “triangle” characterized by ambivalence, has variety characteristics and principles formation. article provides an overview theoretical discourse on strategic triangles, as well practical examples trilateral past present ...

In this study, we examined the longitudinal trends in the university-industry-government (UIG) relationship on the Web in the Korea context by using Triple Helix (TH) indicators and various internet resources, such as, websites/documents, blogs, online cafés, and online news sites. The results indicate that the UIG relationship varied according to the government’s policies and that there was so...

We characterize the subgame perfect equilibriums of the dollar auction in its original form, without the constructs that the literature has added to avoid bid escalation. Contrary to Shubik’s (1971) conjecture, no equilibrium can generate higher expected revenues than the value of the prize. There is a continuum of equilibriums supported by subgames where competition between only two bidders es...

This paper demonstrates a pivotal effect of adding a third rival to bilateral rivalry in the dollar auction, a dynamic model of wars of attrition. Any recursive subgame perfect equilibrium (SPE) involving three rivals on path dynamically Pareto dominates (for the bidders) any recursive SPE involving only two rivals on path, due to a free-rider effect. In any such trilateral-rivalry equilibrium,...

slow sand filters are as a proper technology for pre-treatment of raw water, with a fine and medium trubidity in small communities in developing countries. thus, with a minimum operation cost and minimum need for expest bodies have the maximum efficiency. the purpose of this research is carried out to evaluate the efficiency of two processes of horizontal flow roughing filter and vertical flow ...