Different speech acts such as apologies, refusals, invitation, etc., have studied and differences between English and Persian have shown. But there are several speech acts which have not been investigated as extensively as others. One of them is speech act of condolence. The word condolence originates from the Latin word condoler means "to suffer together" (Zunin & Zunin, 2007). It also means informing a loss, expressing sympathy or empathy with someone.  As a matter of fact humans are emotional beings and in everyday communication individuals can see this emotionality (Morady Moghadam, 2012). Thus this study investigated and analyzed types of speech acts of 50 authentic texts of funeral posters in Iran then showed the frequency and percentage of them. Out of five kinds of speech acts, only four types of them are used in the texts. Based on the results, the order of most frequent to the least frequent used is declarative, directive, expressive and representative.

An analytical-numerical model for the total mobility of AlGaN/GaN based high electron mobility transistors has been developed which is capable to accurately predict the effects of depletion layer thickness on the total mobility with different temperature, gate source biases. In addition, we should take into account the combined contributions from each of the individual electron scattering mechanisms. Salient features of the model are incorporated of fully and partially occupied sub-bands in the interface quantum well. Close agreement with the experimental data confirms the validity of the present model.

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Prevention of sexually transmitted diseases (STDs) is critical. Despite developing treatment and prevention programs, sexually transmitted infections (STIs) are essential in developing acute and chronic diseases. Because “eHealth” (electronic-Health) has excellent potential for disseminating health information to the public regarding STDs, we aimed to identify and review all published articles focusing on preventing STIs. After constructing the design and answering population, intervention, comparison, and outcome questions, two authors conducted a systematic literature search in four online databases in January 2022. The screening process and data extraction were conducted by two authors independently, and then, a quality assessment was performed. After removing duplicates, and two rounds of shortlisting, 16 articles were included for data extraction out of 5113 entries. Included studies were of different designs and assessed six preventive outcomes categories, with condom use being the most frequent result among studies. We also extracted implementation outcomes and reviewed them. Included studies with 13,137 participants have provided reasonable evidence of the effectiveness of different types of eHealth in improving STI prevention interventions. Although this systematic review was not without limitations, it can no longer be ignored that eHealth modes offer many opportunities to prevent STDs, especially among the young population.