INTRUDUCTION: This study aimed to compare the nature, advantages and disadvantages of folksonomies with those of controlled vocabularies and to review the literature related to Library Thing social tags and Library of Congress Subject Headings. METHODOLOGY: This study was a Library research and a comparative study. FINDINGS: Folksonomies has some advantages, including being up-to-date, user oriented, money-saving and non-training, but with some disadvantages, including inconsistency, lack of context, and lack of both precision and recall that can be provided by controlled vocabularies. Thus, it is proposed that these are complementary rather than replacement for each other. CONCLUSIONS: Literature review of Library Thing social tags and Library of Congress Subject Headings showed that studies in this field have been conducted by different research methods and sampling approaches and in various and special areas. There is some match (approximately 50%) between Library Thing social tags and Library of Congress Subject Headings that is inappropriate for replacement. It can be concluded that these two information organization systems can be complementary to each other.

Reflecting on existence as a linguistic practice has always been one of the sublime features of literature. This issue has had a significant appearance in Khayyam, so that Khayyam's work can be considered as a kind of problematic project of questioning existence. In the current research, it was tried to achieve new ontological perceptions of Khayyamian Thing with a materialistic approach and from a post-structuralist perspective. Here, identifying a convergent series of objects on one hand, and proposing the Conversion and Transmission idea as an underlying mechanism in Khayyam on the other hand, prepare strong analytical possibilities for new ontological formulations of Khayyamian Thing. Designing the Conversion and Transmission idea showed that the convergent series of objects are continuously connected with each other, and by producing new ratios, it displays a process of physical inner expansion. Finally, by theoretical analysis of these extended and expanding objects’ relations, four ontological ideas including inexhaustibility of existence, the object having memory, inner-expansion of desire (Oedipal economy of desire), and fetishism, as the result of the symptomatic encounter with Khayyam, are presented.

Dear Editor: Tonsillectomy is the second most common childhood ambulatory surgical procedure, and in the United States alone it is performed in over half a million children a year (1). The two major indications for tonsillectomy are recurrent tonsillitis or tonsillar hypertrophy that causes airway obstruction and sleep-disordered breaThing. Tonsillectomy is associated with multiple postoperative complications, some of which are potentially life threatening. Bleeding is a common complication posttonsillectomy and can lead to hospitalization in up to 4% of cases (2).

According to Civil Code-Article 490-item 2, the lessee is obliged to use the object of lease for the purpose agreed upon in the lease, or if no purpose was specified, for the purpose of profit in the way indicated by the circumstances and conditions of the lease. In case the lessee breaches the lease and possibly not being preventable, according to the aforementioned Civil Code-Article 492, the lessor has the right to cancel the hire.The concept and meaning of the enjoyment of profit contrary to the Thing hired and its consequences is not well established in civil code as well as the law concerning the relations between the lessor and the lessee legislated in the years 1977, 1983 and 1997, This paper attempts to discuss these issues from Islamic jurisprudent point of view.This article, indeed, discusses the concept and meaning of the enjoyment of profit contrary to the Thing hired in three kinds of hire; Things, persons and animals. It also explores the consequences of the enjoyment of the contrary and the sanction of the lessor's breach including the right of the lesser's breach, if it is not possible to prevent the lesser, the liability of the lessor to the object of lease and the liability of the lessor to the profit. Considering the lessor to pay both the specified wage and the average wage of the contradictory profit is a category argued based on the theory of the possibility of possessing contradictory profits, provided that the profit specified in the lease is in contrast with the enjoyed contradictory profit.