A Review on The Second Edition of Farsi Biyamuzim

Despite the variety of electronic resources, textbooks continue to be the main medium of language teaching. Thus, criticizing them can improve the quality of education. This paper reviews the 1st volume of the 2nd Edition of “Farsi Biamuzim”, based on a set of standards and criteria for evaluating academic textbooks. Among the five criticism criteria of structure, content, language, method, and society and culture, the advantages of this work can be found in the general way of teaching the alphabet, providing innovative exercises, selecting practical topics, and designing useful topics in the content of lessons. Its disadvantages can be attributed to the structural inconsistency of the book in the instruction of letters and grammatical materials and the lack of a list of sources and a defect in its list of contents

Carbon quantum dot embedding silica–molecularly imprinted polymer coated optical fiber as ratiometric biosensors toward dopamine detection

We have developed a ratiometric fluorescence sensor for detecting dopamine (DA) using a silica-based molecular imprinting polymer (MIP) coated on cabbage-derived blue emissive carbon quantum dot (CQD) and deposited on optical fiber. Physicochemical characterization confirmed the successful integration of MIP and CQD, which created the selective lossy mode resonance (LMR) for DA monitoring. The experimental factors were optimized to obtain the maximum responses, and the sensing probe displays a dynamic response range of 0.3– 100μm and detection limit 0.027μm . This strategy was successfully applied to detect DA in red wine, coffee, apple, orange, and broad bean juices samples, with negligible cross-reactivity toward other potential interfering species (e.g., epinephrine, ascorbic acid, and uric acid). This novel rotational optical fiber-based sensor has promising potential and versatility for point-of-care, portable, and on-site sensing of environmental and biological samples

Analysis of the Descriptive Lingual Level of Travel Diaries of Hajj Sayyah based on Fairclough’s (Critical Discourse Analysis) Pattern

The Rhree-Dimensional Model of Critical Discourse Analysis Allows the Analyst to Examine the Reflection of Ideology and the Domination of the Power System by Intertextual Description of the Linguistic Signs and their Social Interpretation and Explanation. The Purpose of this Study is to Investigate the Ideology and Domination of the Power System in Different Intertextual and Extra-Textual Layers of Hajj Sayyah Memoirs. Research Findings Show that the Level of Description, Method and Frequency of vocabulary use, indicators, action verbs, positive and definite verbs, simple Sentences, and the Naming Process, at Three Levels of Vocabulary, Syntax, and text have a prominent relationship with the power system. In the section of Relational Values, the Use of Quotations, the Dominance of the Declarative Aspect, the Use of Pronouns Commensurate with the Social Dignity of the Reference, and the Organizational Aspects of the Dialogue are among the Factors Representing the Relationships between Actors and commensurate with their position of power and the relationship between Power and Ideology. At Expressive Values’ Level, the Non-Metaphorical Nature of Language and the Use of Few Examples of it, Show the Author's explicit and reckless confrontation with the system of power. At the text Level, Two Different Constructions are Used in this Work. The Conclusion is that in the Reviewed work, the System of Power and Position of the Writer Regarded to it, has a Prominent Effect on the Use of Linguistic Signs at Different Lexical and Syntactic Levels

High side-mode suppression ratio with a Vernier effect single-mode laser using triple coupled microrings

Abstract The development of single-mode lasers with a high side-mode suppression ratio (SMSR) is challenging but highly desirable for integrated photonics devices and long-distance communications due to their high spectral purity and stability. Here, we demonstrate a single-mode laser with a high side-mode suppression ratio based on size-mismatched triple-coupled microrings. With the exact engineering of several key parameters of the structure like air gap and radii of microrings for controlling the free spectral range (FSR), a predominant mode is selected to lase in amplified spontaneous emission (ASE) of the gain material and all side and high order modes are suppressed by Vernier effect. In this work, we show that a single-mode operation is efficiently generated with an improved side-mode suppression ratio of over 20 dB in a three-ring-coupled microcavity laser. The single-frequency output persists for a wide power range. The theoretical calculations and numerical simulations’ results confirm the validity of the experimental results. Our structural engineering creates new opportunities in a variety of frontier applications in single-mode lasers and high-quality sensors

High Side-Mode Suppression Ratio with a Vernier effect Single-mode Laser Using Triple Coupled Microrings

Abstract The development of single-mode lasers with a high side-mode suppression ratio (SMSR) is challenging but highly desirable for integrated photonics devices and long-distance communications due to its high spectral purity and stability. Here, we demonstrate a single-mode laser with a high side-mode suppression ratio based on size-mismatched triple coupled microrings. With the exact engineering of several key parameters of the structure like air gap and radii of microrings for controlling the free spectral range (FSR), a predominant mode is selected to lase in amplified spontaneous emission (ASE) of the gain material and all side and high order modes are suppressed by Vernier effect. In this work, we show that a single-mode operation is efficiently generated with an improved side-mode suppression ratio of over 20 dB in a three-ring-coupled microcavity laser. The single frequency output persists for a wide power range. The theoretical calculations and numerical simulations’ results confirm the validity of the experimental results. Our structural engineering creates new opportunities in a variety of frontier applications in single-mode lasers and high quality sensors.</jats:p