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.
One of the most significant elements influencing weather, climate, and the environment is vegetation cover. Normalized Difference Vegetation Index (NDVI) and Normalized Difference Built-up Index (NDBI) over the years 2019–2022 were estimated based on four Landsat 8 TIRS’s images covering Duhok City. Using the radiative transfer model, the city's land surface temperature (LST) during the next four years was calculated. The aim of this study is to compute the temperature at the land's surface (LST) from the years 2019-2022 and understand the link, between LST, NDVI, and NDBI and the capability for mapping by LANDSAT-8 TIRS's. The findings revealed that the NDBI and the NDVI had the strongest correlation with the
... Show MoreAfter a temporary halt to forced thghebr in different cities of Iraq this methodlogy
opeations returned directiy in the areas of political conflict on the ground which are translated
operations and forced displacement violence es they operations aimed at completing the
forced displacement that occurred after the occupation in(2003)which took an upward curve
publicly after these events and some of which are aimed at the liquidation of some provinces
than any demographic diversity of religious or sectarian or alhens and others aimed at
redemographic distribution within the province itself to produce a net sectarian zones as is the
case in Diyala Nineveh and Babylon Baghdad has the epicenter of sectarian violence and th
Both religions have urged (honoring parents and kin) through the texts that came in their original sources, as honoring parents means showing respect to them In word and deed, and carrying in our hearts an appreciation for their status, and God commands to honor parents; Becausee this is Important in the eyes of God that he includeincludeed it in the Ten Commandmen.
The rhetorical significance of history and the presentation of events through ages allow us to understand the mental changes and to investigate the evolution of the ideology of literary philosophy.
... Show More
يمثل الكتاب كشاف لمجلة الاستاذ للعلوم الانسانية والاجتماعية والتي تصدرها الكلية وغطي الكشاف اعداد المجلة ابتداءً من العدد 50 الذي صدر في عام 2002 ولغاية العدد (104) الذي صدر 2009 . وكان عدد الابحاث المنشورة (1217 ) بحثا وكانت (985 باللغة العربية و 173 باللغة الانكليزية و 50 باللغة الكردية 9 باللغة الاخرى ) .
لقد اعتبر انسان وادي الرافدين قديماً، الكون عبارة عن دولة كونية، وكل مافيه - اي الكون كان يعد عبارة عن ذوات فردية، فكل حي وجماد وفكرة مجردة وكل حجر وكل شجرة وكل خاطر يتمتع بارادة ذاتية وشخصية خاصة، لقد تمثل الكون في ذهن الانسان بهيئة واحدة الا وهي نظام من الارادات فالكون ككل منسق انما هو مجتمع، أو دولة فكانت هذه الدولة الكونية تضم إلى جانب الشخصيات الفعالة في هيئة الحكم اعضاء لم يكن لهم نفوذ في السياسة ولا دور ل
... Show Moreيبحث هذا البحث في افعال المقاربة التي تعد من الافعال الناسخة في اللغة العربية التي تدخل على الجملة الاسمية فتبقي المبتدأ مرتفعا بها ويسمى اسمها وتنصب خبره وتقسم هذه الافعال الى اقسام ثلاثة افعال المقاربة وهي (كاد ,اوشك ,كرب هلهل ,قارب ) وافعال الرجاء وهي (عسى , اخلولق , حرى ) وافعال الشروع وهي (اخذ ,وهب ,بدأ ,انشا , شرع , اقبل ,قام ) وتشابه كاد في معناها وفائدتها جعل وشرع وعلى الرغم من عدم ذكر القران الكريم لأي اية فيها
... Show More
أصل التفاوت في الاتجاهات السياسية بين الناس
This research deals with process of artistic conception of nature's images between becoming and buration, as an attempt to transfer the philosophical concepts to art via it's structural applications in forming the picture, due to the importance of these concepts which might be engaged with the vision of the artist in his own and subjective contention with the nature. The research consists of four chapters, first one included the problem of the research, importance, need to the research and the aim of the research represented by process of artistic conception of nature's images between becoming and buration. Also included the limits of research and most important terms. Second chapter included theoretical frame that consists of thre
... Show More
Christian rites and rituals to be performed, not abandon them, and they see it as a sacred duty in Christ's (as) followers, including: (secret baptisms among Christian denominations, descriptive study) baptisms in the Christian Mystery of God of the mysteries of the Church, every Christian must be baptized always resented It was alaimanh, the Guide mentioned in the Bible by Jesus to his disciples ((just go make disciples of all Nations and immersed them in the name of the father and of the son and of the Holy Spirit, teaching them to observe all that I advised you, and here I am with you all days to the end of the age))( And be baptized in the name of the father and the son and the Holy Spirit, and that's what makes this practice through th
... Show More