This work proposes a novel method to find the phase error and oscillation amplitude in multiphase LC oscillators. A mathematical approach is used to find the relationship between every stage's output phase and its coupling factor. To much more general analysis, every stage assumed to have a different coupling factor. The MISMATCHES in LC tanks are considered as the main source of phase errors and accordingly the phase deviation of each stage is calculated in a distinct equation. Then, the amplitude of oscillation for each stage is individually derived using phase error results. Not only considering different coupling factors increases the generality of this work but also the results are in better conformance with simulations compared to previous works. The theoretical results are evaluated and confirmed through extensive simulations using ADS software.

In this paper, recommended spiral passive micromixer was designed and simulated. spiral design has the potential to create and strengthen the centrifugal force and the secondary flow. A series of simulations were carried out to evaluate the effects of channel width, channel depth, the gap between loops, and flowrate on the micromixer performance. These features impact the contact area of the two fluids and ultimately lead to an increment in the quality of the mixture. In this study, for the flow rate of 25 μl/min and molecular diffusion coefficient of 1×10-10 m2/s, mixing efficiency of more than 90% is achieved after 30 (approximately one-third of the total channel length). Finally, the optimized design fabricated using proposed 3D printing method.

Intracytoplasmic sperm injection (ICSI) is one of the most successful techniques of Assisted Reproductive Technology (ART) and is mostly in use for the treatment of infertility with male factors. In this method, before injecting sperm into the intracytoplasmic of the oocyte, cumulus cells around the oocyte must be stripped to facilitate the injection process. To achieve this, both enzymatic and mechanical methods are used in embryological laboratories for denudation, which has major deficiencies, including the possibility of damaging the oocyte prior to the injection process. In this research, a microfluidic-based device is introduced for the separation of cumulus cells around the oocyte with minimum manual operations. The results prove high efficiency, and non-destructive denudation of the oocyte with the reduced amount of culture medium leads to the low-cost preparation process of oocytes. The process can also be integrated with ICSI chips under development and will be reported shortly.

Academic literacy is a transformative approach to EAP studies that highlight the backgrounds and needs of the EAP learners in order to empower them by participating in the social practices of the international research community. From this perspective, EAP textbook development research aims to find how textbooks could empower EAP learners though considering their real needs. Accordingly, this study aims to find how EAP textbooks match/mismatch with the EAP learners’ needs. The sample of the study included 40 participants who were selected through purposeful homogeneous sampling. All participants who had passed ‘ English for the Students of Science (ESS)’ as the main textbook of the EAP course completed a structured interview questionnaire that its findings were gone under content analysis and a nonparametric test of rankings themes, i. e. Friedman test. Then textbook was evaluated in terms of the established frameworks. Finally, identified themes of the interviews were compared with the content of the textbook evaluation. Findings of the study showed that EAP learners prioritized reading, writing, listening, and speaking English language skills respectively as the main language needs in the EAP community of practice. The study also found that although the design of the EAP textbook matched learners’ needs at the macro-level of needs analysis, there was little enough evidence in the content of the book that could support and match these EAP learners’ needs. The findings might have many implications for EAP textbook developers, learners, and teachers.

As an inseparable part of teachers’,education career, practicum supervision can function as a double-edged sword that can generate pedagogical improvement or even make the worse worst in the class depending on the time and manner of its implementation. Given its significance and crucial role in EFL contexts, supervision has captured the attention of some scholars in this line of research. However, few studies (if any) have focused on EFL teachers’,beliefs about instructional supervision and its role in pedagogical development considering their experience level. To fill this lacuna, the current study examined the perceptions of 100 Iranian EFL teachers with different experience levels toward various supervisory practices and their contribution to teacher pedagogical growth using an Instructional Supervision Questionnaire (Kayaoglu, 2012). Furthermore, a semi-structured interview was carried out with 10 EFL teachers taken from the same sample. The results of analyses indicated that both novice and experienced teachers had a negative view concerning the existing supervision system in Iran. Additionally, no significant difference was found between the novice and experienced EFL teachers’,beliefs about classroom supervision (p >. 05). The qualitative findings also revealed that both novice and experienced EFL teachers considered supervision as bureaucracy, fault-seeking, confidence-minimizing, and with little to no instructional worth. They also had similar beliefs as per the characteristics of an effective supervisory act. Moreover, supervision was perceived useful only when teachers were novice instructors, but ineffective as they became experienced.