Photonic crystal fiber interferometers (PCFIs) are widely used for sensing applications. This work presented solid core-PCFs based on Mach-Zehnder modal interferometer for sensing refractive index. The general structure of sensor was applied by splicing short lengths of PCF in both sides with conventional single mode fiber (SMF-28).To apply modal interferometer theory collapsing technique based on fusion splicing used to excite higher order modes (LP01 and LP11). A high sensitive optical spectrum analyzer (OSA) was used to monitor and record the transmitted wavelength. This work studied a Mach-Zahnder interferometer refractive index sensor based on splicing point tapered SMF-PCF-SMF. Relation between refractive index sensitivity and taper waist diameter were studied through simulation and experiments. The experimental and simulation results show that sensitivity would be increased with a decrease of taper waist diameter. The response of the PCFI is observed for a range of refractive index values from (1.33 to 1.38). When the length of PCF was (4)cm with different taper waist diameter (125,107,90,60)μm, the maximum refractive index sensitivity of (20 pm / RIU) was achieved. When taper waist diameter became (60)μm, the rate of increase in sensitivity was 12.4% compared with the taper waist diameter (125)μm.
Science is linked to each other bonds assets, branches and even close to each other; to become a link of this type of patterns of scientific integration, and perhaps the most prominent science that saw the overlap and interdependence of science and jurisprudence and its origins, and this interdependence did not stop at the epistemological foundations of knowledge; To the branches, methods of extraction, and diligence to extend to the terminology; to find similar terms in both flags; to become those terms similar in the word and meaning and even the end, but we do not lack terms similar in pronunciation and differing in meaning; and this difference is imposed by the specificity of each science and what M E; however, approached many terms
... Show Moreأسلوب العطف: دراسة مقارنة بين اللغة العربية والاسبانية
تشهد ظاهرة عمالة الأطفال انتشارًا عالميًا واسعًا، حيث يعمل حوالي 250 مليون طفل في مختلف أنحاء العالم، من بينهم 150 مليونًا في أعمال خطرة، وأكثر من مليون طفل يتعرضون للاتجار بالبشر. ورغم أن هذه الظاهرة شائعة في الدول النامية والفقيرة، إلا أنها لا تقتصر عليها، بل تمتد إلى الدول الصناعية المتقدمة بنسب متفاوتة حسب طبيعة المجتمعات. ونظرًا لتعقيداتها وآثارها السلبية، حظيت هذه المشكلة باهتمام متزايد خلال العقود الأخ
... Show Moreunderemployment
Los enunciados interrogativos desempeñan un papel de sumo interés en el habla del ser humano en todo el mundo, además de la gran importancia que desempeñan sus distintos enunciados y partículas en abreviar las oraciones y hacer llegar a nuestro interlocutor nuestra intención con pocas palabras, por eso a través de esta investigación vamos a enfocar la luz sobre uno de sus tipos fundamentales "los enunciados interrogativos directos", a través de un estudio morfológico contrastivo entre el árabe y el español, este fue el principal motivo para elegir este tema.
A pesar de que los enunciados interrogativos directos aparentemente no ofrecen mucha dificultad, pero dominar a dicho tipo de enunciados con
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Interested in current research examining the concept of synthesis in contemporary ceramics, he studied the synthesis as a concept to achieve technical and aesthetic innovation.
The study comes in four axes. The first axis to ensure the general framework for research, containing the problem, which is to ask the following: Is the concept of synthesis role in enriching the contemporary ceramic done? The importance of research and study are needed in addition provide knowledge in the field of contemporary art
One of the infections that occurred on the Arabic tongue is melody, distortion and intruder, with it Arabic has moved away from classical Arabic, as it was taken from other western and eastern languages, the Arabic language is introduced, in addition to foreign words that are one of the causes of the deviation of classical Arabic in the era of eloquence
The poverty in the developing countries is output to under development as we consider welfare, where as when the poverty disappear that produced be the general development . Historically, in our countries, the underdevelopment is the result of colonialism period and what is associated with it of transferring the surplus abroad and the disorder of production structure. And at the present time, the poverty is reproduced and aggravated in the last years as a result of many internal and external reasons.Today, poverty is associated in many forms with the poverty previously.
المقدمة
اشكالية الطائفية السياسية في العراق بين الاستمرارية والانكفائية
abstract:
Objectives: The study aims to reveal the approach of Imam Al-Salmi in the weighting between the apparently conflicting texts, and to show the extent of his agreement and disagreement with the rest of the fundamentalists, and does he have vocabulary that can be used to elicit legal rulings in modern contemporary issues?
Method: The method of induction and analysis is one of the main tools to reach the research results. The study resorted to following the sayings of Imam Al-Salmi in various sources and fatwas and standing on them, then analyzing and applying them to the various branches of jurisprudence in the various jurisprudential chapters.
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