This study investigated the effects of sociocultural instruction on developing the speech act of criticizing. The participants were second language learners in two English learning classrooms as experimental and control groups. The participants in the experimental group operated under the basic principles of the socio-cultural approach with interactive tasks, cooperation, and scaffolding. They were asked to read and criticize a peer’ s work orally. For this group, the teacher provided fined tuned instruction and mediated individual tutor feedback. For both the experimental and control groups, the learners’ pragmatic development was measured through pre-tests, immediate and delayed posttests performance of discourse completion and role-play tests. The researchers analyzed the results of tests through statistical procedures such as paired and independent t-tests. The results revealed that the experimental group signifi cantly improved and performed better than the control group, indicating the successfulness of sociocultural instruction. Next, the researchers interviewed the participants to find about their feelings. After interviewing the participants, the researchers found positive feelings of learners about this kind of instruction including low degrees of stress, high levels of excitement, fun, motivation, and clarity that provided another evidence for worthwhile impacts of sociocultural instruction.

In this paper, the electron transport through a zigzag single-walled carbon nanotube (SWCNT) junction consisting of zigzag SWCNT (central region) sandwiched between two semi-infinite metallic zigzag SWCNT leads to the presence of an applied uniaxial strain is numerically investigated. This study is based on a nearest-neighbor tight-binding approximation within the framework of a generalized Green’s function technique and relies on the Landauer-B¨utikker formalism. The results show that the electron transport properties of the system can be well controlled by modifying the uniaxial strain strength and length of the SWCNT junction. Besides, applying compressive strain is more effective than tensile strain in opening a band gap in the system. Furthermore, the current amplitude for the tensile strain is bigger than the compressive strain with the same absolute values of uniaxial strain strength. As the length of the intermediate region increases, the density of states in Fermi energy decreases, and the magnitude of the electron emission function in Fermi energy decreases to zero, leading to the transition of the metal to the semiconductor.

Effective marketing, which is a method of marketing in the context of social networks that includes offering and introducing products and services by influential people, has become an integral part of retailers' digital marketing strategies because this new marketing method is effective in converting higher profits. Is. Especially with Corona in 2020, the way of living and buying and selling products underwent major changes, which increasingly considered the issue of marketing with influential people as a necessity in online stores. The main purpose of this study is to investigate the effect of inspiration, aesthetics, hedonism, awareness of advertising through influential people in the social network Instagram as human brands on meeting the needs, attachment and transfer of attachment of followers (Case study: health and beauty products). . The present study is in the category of descriptive survey research. The statistical population of the study is all people over the age of 18 who use Instagram. The sampling method in this study was simple random and the number was 384 people. The assessment tool in this study was a researcher-made questionnaire. Statistical analyzes were performed using structural equation methods and SPSS and Amos software. To determine the causal relationship between the variables, the structural equation model method and significance levels, and to test the hypotheses p_value less than 0.05 is considered. Research findings show that the inspiration of influencer marketing (marketing with influential people) has a positive and significant effect on the ideal of followers in social networks.

Since its inception, social science in general and international relations in particular have always focused on collective human entities. In the meantime, various concepts have been used to refer to these collective entities, One of which is security community, coined by Deutsch and his colleagues proposed for the first time in 1957. From the 1950s, this concept has been a theoretical basis for many scholars to explain international developments, but over time it has been reformulated, This article tries to evaluate the position of this concept in the literature of international relations with a critical view by using the content analysis of the theoretical texts that have been written about the security community in the last six decades. The question is, what is the evolution of the security community since its inception? The findings of the current research indicate that the security community, having passed through two different generations of theorizing the concept of security community, has a rare capacity for conceptual and theoretical development in the form of an "international theory on security community".