Extramedullary hematopoiesis (EMH) is a physiological compensatory phenomenon occurring in many hemolytic anemias including thalassemia. Besides transfusion, radiotherapy, surgery or a combination of these modalities, hydroxyurea (HU) as an optimal treatment has been described occasionally. We described a case of beta-thalassemia major who has been on regular blood transfusion and developed EMH...

Optimality Theory (OT) has a growing importance in various disciplines of linguistics. The way in which correct linguistic expressions are generated according to OT can be captured formally in an Optimality System (OS). An OS de nes a relation between an input and an output using a binary relation, called gen, on the domain, and a set of constraints. Frank and Satta ([1]) have shown that an OS ...

R is called commuting regular ring (resp. semigroup) if for each x,y $in$ R there exists a $in$ R such that xy = yxayx. In this paper, we introduce the concept of commuting $pi$-regular rings (resp. semigroups) and study various properties of them.

We list the major properties of some important classes of subrational relations, mostly to make them easily accessible to computational linguists. We then argue that there are good linguistic reasons for using no class smaller than the class of synchronous regular relations for morphological analysis, and good mathematical reasons for using no class which is larger. 1 Below the Rational Relatio...

We investigate some basic questions about the interaction of regular and rational relations on words. The primary motivation comes from the study of logics for querying graph topology, which have recently found numerous applications. Such logics use conditions on paths expressed by regular languages and relations, but they often need to be extended by rational relations such as subword or subse...

We deal with the new class of pre-ℐ-regular pre-ℐ-open sets in which the notion of pre-ℐ-open set is involved. We characterize these sets and study some of their fundamental properties. We also present other notions called extremally pre-ℐ-disconnectedness, locally pre-ℐ-indiscreetness, and pre-ℐ-regular sets by utilizing the notion of pre-ℐ-open and pre-ℐ-closed sets by which we obtain some eq...

The Regular Post Embedding Problem is a variant of Post’s Correspondence Problem where one compares strings with the subword relation and imposes additional regular constraints on admissible solutions. It is known that this problem is decidable, albeit with very high complexity. We consider and solve variant problems where the set of solutions is compared to regular constraint sets and where on...