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4021. Composite Structures of C919
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| Selim Gurgen, Hayati Cakir, Mehmet Alper Sofuoglu and Melih Cemal Kushan |
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Abstract |
Pdf
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Category : Conferences and others | Sub Category : Conference Publications |
Composite Structures of C919
One of the last products in commercial aviation belonging to China is the C919 passenger airplane. This latest product is a product made by China to enter the market, especially against the series of Airbus A320 and Boeing 737. So it is a modern passenger plane consisting of single corridor and three-row seats like its competitors. In this study, composite structures used in the body of this new aircraft are discussed. Since the A320 and Boeing 737 are older design products, the use of composite materials in their fuselages is very low. At least the aviation use of composites is a surprising fact. The lowest utilization rate of composites is the aviation sector, which is a surprising fact. Because, although composite materials have been developed with aviation and aircraft industry, the rate of utilization in the sector is not very high yet. Especially in terms of weight and cargo we can say that the capacity is still higher in the high-altitude airplanes than in service conditions of metal alloys.
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Culture, National Identity, and Globalization between the Lines of Reading Comprehension Texts in Iran
This study was an attempt to investigate the extent to which culture, national identity, and globalization are represented in reading comprehension materials currently taught for General English Courses at tertiary level in Iran. To fulfill this purpose, five General English textbooks were randomly selected from among the total number of twenty books published by Iranian writers throughout the country. Drawing on Byram's (1993) model of content analysis, the reading passages of the books were analyzed as the kernel sections of the books. The results of the content analysis revealed that the majority of the reading texts were culturally neutral focusing, for the most part, on scientific issues; and only a small number of texts addressed home culture and national identity; also, texts representing target culture and international culture were not numerous. Thus, conclusions can be drawn that materials prepared for General English Courses in Iran are not adequate for addressing national identity and raising cultural awareness, nor are they sufficient for informing learners of the target and international culture in the era of globalization and cross-cultural communication.
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Data Salvation in Wireless Sensor Networks Using Mesh Topology
Security has become one of the major issues for data communication over Wired and Wireless sensor networks. Consider wireless sensor networks while transferring the data it can be attacked by different kinds of attacks such as compromised node, denial of service attacks. We agree that existing multi-path routing approaches are vulnerable to such attacks, mainly due to their deterministic nature. By considering the routing algorithm, it can compute the same routes known to the source, therefore all information sent over these routes. To secure the data from these attacks we can generate randomized multipath routes. These routes are taken by the shares of different packets change over time. While sending the data the randomized multi path routes include the same routes. In this paper, instead of selecting self-nodes we generate dynamic multi path routing in which the shares of different packets are taken and send to the destination. We develop efficient topology for delivery the data in secure manner. The experimental results show that topology out performs traditional schemes in terms of CPU cost, minimization of retransmissions.
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Design of experiments: a powerful tool for agriculture analysis
This Article introduces the basic concepts, terminology, goals and procedures underlying the proper statistical design of experiment. This section describes in detail the process of choosing an experimental design. The choice of design in agricultural field experiments depends on the objectives of the experiment and the number of factors to be investigated.
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Design, Development and formulation of Topical anti arthritic gel using different gelling agents
The aim of this study was firstly to compare between different gelling agents for its drug release characteristics, and viscosity and Secondly, to investigate the effect of presence of PluronicF127 on drug release and viscosity of different gelling agents. Topical gel formulations of Ibuprofen were prepared by using Carbopol 934, Carbopol 940, HPMC, Sepineo, Sodium Carboxymethylcellulose (NaCMC) and Hydroxyethylcellulose (HEC) polymer as a gel-forming material that is biocompatible and biodegradable. The skin permeation enhancer used was Menthol. Permeation studies were carried out in-vitro using Cellophane Membrane. In-vitro diffusion study showed that diffusion studies of formulation F6 and marketed gel was comparable. The in-vitro study also reveals that addition of Pluronic F127 results in increase in viscosity of gel which further sustains the drug release. Results shows that as concentration of gelling agent increases viscosity increases and drug release decreases.
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Developing a native ITSM Model for smart schools program applicable in developing countries
This research, provided a proper procedure in order to build up an IT service management Model with the goal of developing a convenient model for the optimized deployment of the IT services in the smart schools plan imposed for the country. To achieve this goal, first, IT service management (ITSM) in general and IBM model in particular are introduced, Later on a generic model is presented for IT service management base on extraction and mapping among IBM model processes and IT services of the smart schools. Finally sample scenarios on administrative components are defined in the line of the strategic plans in order to analyze and evaluate the implementation of the proposed model.
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DFT and TD-DFT study of (E)-3-(5-(anthracen-3-yl)- hexahydrothieno[3,4-b][1,4]dioxin-7-yl)-2-cyanoacrylic acid dye for Dye Sensitized Solar Cell Application
In this study, the optimized geometries, electronic structures, polarizability, hyper polarizability and dipole moment of the chosen (E)-3-(5-(anthracen-3-yl)-hexahydrothieno[3,4-b][1,4]dioxin-7-yl)-2-cyanoacrylic acid (E-3-2- CYANOACRYLIC ACID) dye sensitizer has been analyzed by using Density Functional Theory (DFT) and Time Dependent Density Functional Theory (TD-DFT) calculations (based on hybrid functional B3LYP). The HOMO and LUMO energies of the dye (E-3-2- CYANOACRYLIC ACID) are -4.84 and -2.22 eV respectively based on DFT calculations. To understand the conversion efficiency of the chosen dye architecture unit we selected TiO2 as a model for semiconductor. Results reveal that the selected dye sensitizer exhibits large dipole moment difference between the ground and excited state which is comparable to that of metal based dye sensitizers. Results concluded that intramolecular energy transfer is occurring in (E-3-2- CYANOACRYLIC ACID) and further the large dipole moment would be expected to give high photo-current conversion efficiency in practical Dye sensitizer solar cells (DSSC) besides promising candidate as a sensitizer for DSSC applications.
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Digestive Enzymes Profile in Fish exposed to Recycled Sugar Factory Effluent
This study highlights the impact of recycled sugar factory effluent on the digestive enzymes of fish. The need for this task arises from the trend of releasing the untreated effluent into the aquatic body. The bioassays conducted separately with the raw and recycled sugarfactory effluent against the fish,Catla catla. This study exposed that quantum of decrease in the digestive enzyme level in the fish exposed to the highest concentration of raw sugar factory effluent is more when compared to that of fish treated in the recycled sugar factory effluent. The reuse of recycled sugar factory effluent is highly recommended for aquaculture through this study.
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Distributional generalized finite Hankel type transformation
In this paper we have extended generalized finite Hankel transform in [2] with the use of Zemanian’s technique related to the transformations arising from orthonormal series expansions (see [6]). Inversion formula, characterization theorem and application of differential operator in solving certain type of differential equations have been established.
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Dr.Aini Mat Said joined the team of Elixir Editorial Advisory Board from 21st February 2011
We are very happy to announce that from 21st February 2011, Dr.Aini Mat Said has joined the team of Elixir Editorial Advisory Board. He will carry a special responsibility for dealing with manuscripts based on the Resource Management and Consumer Studies Faculty of Human Ecology. Dr.Aini Mat Said is currently working Department of Resource Management and Consumer Studies Faculty of Human Ecology, Universiti Putra,Malaysia 43400 UPM Serdang, Selangor Malaysia. The appointment of Dr.Aini Mat Said as member Editorial Advisory Board strengthens the links with Iran and will make it easier for prospective authors to establish contact with the journal. Please send any expressions of interest to chiefeditor@elixirjournal.org. Sincerely Editor-in-Chief
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