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شیوه پارتی:
پس از حمله اسکندر، یونانی‌ها تلاش داشتند که به گونه‌ای سلیقه وفرهنگ خود را به ایرانیان تحمیل کنند، اسکندر برای رسیدن به این هدف، مخصوصاً در ایران فرمان داد تا ده هزار تن از سربازان و سرداران او با زنان ایرانی ازدواج کنند و…
A Brief Review of High-Frequency Gravitational Waves
In this paper gravitational waves in high-frequency limits were briefly reviewed. A general formalism was derived for approximating gravitational wave solutions to the vacuum Einsteinequations of general relativity in situations where the gravitational fields are quite strong. To accomplish this by assuming that the wave has a high-frequency limit and expands the vacuum field equations in powers of the correspondingly small wavelength, getting an approximation scheme valid for all orders of strength of the gravitational field. In following, some methods for experimental generation of high-frequency gravitational waves (HFGWs) and some natural sources of gravitational waves in high-frequency limits were briefly suggested. And ultimately, possible technological pathways for detection of…
دانلود رایگان فیلم آموزش برنامه نویسی WPF به زبان فارسی
- takbook
- سایر رشته های هنر
- 14th سپتامبر 2016
- بدون نظر
دانلود رایگان فیلم آموزش برنامه نویسی WPF به زبان فارسی
WPF که توسط مایکروسافت ایجاد شد، یک زیر سیستم گرافیکی برای رندر کردن واسط های کاربر در برنامه های کاربردی تحت ویندوز می باشد. WPF بستری هسته WPF یک موتور رندرینگ برداری و مستقل از وضوح تصویر است که برای بهره برداری از مزایای سخت افزار های گرافیکی امروزی ساخته شده است. تعبیه WPF در نسخه های سیستم عامل ویندوز از ویندوز ویستا و ویندوز سرور ۲۰۰۸ آغاز شد، که البته در ویندوز XP و ویندوز سرور ۲۰۰۳ نیز قابل استفاده است.شما میتوانید از لینک زیر بعد از پرداخت…
An Investigation into Biocompatibility and Biodegradability of PLLA Nano-Scaffold using Electrospinning
- takbook
- آب و هواشناسی ( اقلیم شناسی )
- 14th سپتامبر 2016
- بدون نظر
An Investigation into Biocompatibility and Biodegradability of PLLA Nano-Scaffold using Electrospinning
Tissue engineering provides a new research field. In this new research field, cell, scaffold and biomolecules are used to create an extended landscape in restoration, repair and maintenance of tissues. In this study, nano properties of polymer scaffolds for tissue engineering purposes are discussed.PLLA polymer scaffold was created using electrospinning technique ,chloroform solvent and DMF. Then the surface of scaffold was treated to improve biodegradability. Scaffold was investigated in terms of surface morphological characteristics, biodegradablility, porosity and pore size. For this purpose, porosity measurements with Archimedes law, biodegradablility test and scanning electron microscopy study were performed. Degradation rate of scaffold is high because there are small pores and…
A Novel Example of Non-Rigid Compatible with Ascending Chain Condition on Annihilators
A Novel Example of Non-Rigid Compatible with Ascending Chain Condition on Annihilators…
A QSAR investigation on pentanamide Compounds as stomach cancer drug
Quantitative structure activity relationship models are regression or classification models used in the chemical and biological sciences and engineering. QSAR models first summarize a supposed relationship between chemical structures and biological activity in a data-set of chemicals. Second predict the activities of new chemicals. For example, biological activity can be expressed quantitatively as the concentration of a substance required to give a certain biological response. In work, quantitative structure activites relationship study has been done on pentanamide Compounds analogues acting stomach cancer inhibitors. Genetic algorithm , artificial neural network and multiple linear regression were used to create the non-linear and linear QSAR models. GA-ANN model was much better than…
A nanotube catalyst efficient and reusable for epoxidation
In the present work, the preparation, characterization and investigation of catalytic activity of tungsten hexacarbonyl, W(CO)8, supported on multi-wall carbon nanotubes modified with 1-aminopyridine is reported. The catalyst, [W(CO)5@Apy-MWCNT], was characterized by physico-chemical and spectroscopic methods. The prepared catalyst was applied as an efficient catalyst for green epoxidation of alkenes with hydrogen peroxide in CH4CN as solvent. This heterogeneous metal carbonyl catalyst showed high stability and reusability in the epoxidation reactions without loss of its catalytic activity….
Atom-type-based AI topological indices: application in modeling boiling points of aliphatic esters
In this work, modeling normal boiling points (NBPs) of a group of aliphatic esters using a combination of the modified Xu (mXu) and the atom-type-based AI topological indices was studied. At first, simple linear regression model was developed using mXu index alone and the statistics of squared correlation coefficient, Fisher ratio and standard error were 19..0, 0.88891 and 79.5, respectively. Significant decrease in the standard error of the model (about .12) was observed upon introduction of the topological indices of AI(–CH8) and AI(–O–). Statistical validity and stability of the three-parameter regression model was tested using external validation technique by dividing the entire data set into five subsets and predicting NBPs for each subset from the other four as…
A comparison of three observational techniques for using postural analysis in a cable factory
- takbook
- پزشکی عمومی
- 14th سپتامبر 2016
- بدون نظر
A comparison of three observational techniques for using postural analysis in a cable factory
Work-related musculoskeletal disorders (WMSD) which are related with repetitive and demanding working conditions continue to represent one of the biggest complications all over the world. Assessment of exposure levels to WMSD risk factors can be an appropriate base for planning and implementing interventional ergonomics programs in the workplace. This study is focused on posture analysis of a cable manufacturing company workers. The study was conducted on 03 workers engaged in different process of manufacturing. The different activities of the workers were recorded by video and still photography, and these images were used for analysis. Posture analysis tools RULA, REBA and QEC were used. The results of RULA showed that about 33% of the workers were under high risk level and needed a…
آنتی ویروس در بازار چهل هزار تومان
آنتی ویروسی که ر بازار قیمتش چهل هزا تومانه ما برای شما سی هزارتومان گذاشتیم دانلود کن رضایت نداشتی به آیدی تلگرام زیر پیام بده @ssdd12s
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