In this paper we present a dual representation for the multiple stopping problem, hence multiple exercise options. As such it is a natural generalization of the method in Rogers (2002) and Haugh and Kogan (2004) for the standard stopping problem for American options. We consider this representation as the real dual as it is solely expressed in terms of an infimum over martingales rather than an...

We examine the Rasch model for latent structure para‎- ‎meters in ‎binary and multiple response questionnaires and develop‎ ‎methodologies and data-analytic tools for assessing‎ ‎collaboration/che‎- ‎ating in multiple choice tests

listening skill and speaking skill, according language didactics, have close interaction in lingual communications. therefore, measuring listening comprehension without considering other language skills seems to be difficult. the present study is an effort to compare the effectiveness of oral and written multiple-choice listening tests for persian language learners. in fact, this study answers ...

When constructing a test, an initial decision is choosing an appropriate item response format which can be classified as selected or constructed. In large-scale tests where time and finance are of concern, the use of response chosen known as multiple-choice items is quite widespread. This study aimed at investigating the impact of response format on the performance of structure tests. Concurren...

Introduction: Dual-modality contrast agents, such as radiolabeled nanoparticles, are promising candidates for a number of diagnostic applications, namely SPECT imaging with MR imaging. So the aim of study was evaluating potential of Chitosan-Coated Magnetic Nanoparticles(SPION) labeled with 99mTc as new Dual-modality probes for liver Imaging. Materials and Methods:</st...