The extraction of the keywords that characterize each document in a given collection is one of the most important components of an Information Retrieval system. In this article, we propose to apply shallow parsing, implemented by means of cascades of finite-state transducers, to extract complex index terms based on an approximate grammar of Spanish. The effectiveness of the index terms extracte...

Using new data on market-based transactions we construct real estate price indexes for Manhattan between 1920 and 1939. During the 1920s prices reached their highest level in the third quarter of 1929 before falling by 67% at the end of 1932 and hovering around that value for most of the Great Depression. The value of high-end properties strongly co-moved with the stock market between 1929 and ...

We consider the question of how information from the textual context of citations in scientific papers could improve indexing of the cited papers. We first present examples which show that the context should in principle provide better and new

This paper explores the effectiveness of index terms more complex than single words in conventional information retrieval systems. Retrieval is performed in two phases. In the first phase, a conventional retrieval method (the Okapi system) is used and in the second phase, complex index terms such as syntactic relations and single words with part of speech information are introduced to rerank th...

Throughout the ground field is always supposed to be algebraically closed of characteristic zero. Let X be a smooth projective threefold of general type, denote by φm the m-canonical map of X which is nothing but the rational map naturally associated with the complete linear system |mKX |. Since, once given such a 3-fold X , φm is birational whenever m ≫ 0, thus a quite interesting thing is to ...

"The flowering part, it looks like someone is sticking their tongue out" (a subject's description of Arethusa bulbosa, see Figure 1). The mechanisms that people use in natural settings to describe objects to one another can be used to inform the design of image retrieval and museum systems. The image retrieval problem may be recast as an object description problem where the images are of object...

Non-orthogonal multiple access schemes (NOMA), such as sparse code (SCMA), are among the most promising technologies to support massive numbers of connected devices. Still, minimize transmission delay and maximize utilization channel, “grant-free” NOMA techniques required that eliminate any prior information exchange between users base-stations. However, if a large number transmit simultaneousl...

Introduction: There is not enough evidence regarding the influence of folate deficiency in etiology idiopathic male infertility. Objectives: The objective current study was to examine whether there an association between serum levels and sperm parameters among infertile males. Patients Methods: This cross-sectional undertaken on a sample males referring infertility treatment clinic Isfahan prov...