نتایج جستجو برای: LTR

تعداد نتایج: 3405  

ژورنال: :مهندسی مکانیک مدرس 2014
امیررضا کوثری مهدی پیروانی مهدی فکور حسین نجات

در این مقاله به طراحی کنترل¬کننده lqg/ltr برای کنترل وضعیت ماهواره زمین آهنگ در فاز نامی پرداخته می¬شود. طراحی مد نظر از سه بخش طراحی رگولاتور lqr، فیلتر کالمن توسعه یافته و بخش ltr تشکیل می¬شود. طراحی کنترل¬کننده براساس مدل خطی ماهواره و با استفاده از مدل کاهش¬یافته کواترنیون¬ها انجام می-شود. مدل کاهش¬یافته کواترنیون¬ها مشکل عدم کنترل¬پذیری سیستم، در زیرفضاهای غیر قابل کنترل مدل کامل، را حل می...

Journal: :Journal of virology 1994
M A Gama Sosa D H Rosas R DeGasperi E Morita M R Hutchison R M Ruprecht

To assess the influence of the 3' long terminal repeat (LTR) on the promoter/enhancer activity of the 5' LTR, a set of isogenic retroviral vectors differing only in the U3 region of the 3' LTR was constructed. These U3 elements were derived from viruses with different tissue tropism. The 5' LTR originated from Moloney murine leukemia virus and directed the transcription of a reporter gene (chlo...

2000
Tzur Vaich Arnon Cohen

Connected Word Recognition (CWR) systems are needed for many consumer applications. In such applications cost is a major factor. Several architectures for HMM based CWR are examined to provide an optimal cost effective configuration. Three architectures were examined: a simple LTR with no skips, LTR with skips (LTR-WS) and MultiPath LTR. The LTR-WS and the MP-LTR were shown to be superior to th...

2011
T. Ishihara H.-J. Guo

For non-minimum phase plants, a partial LTR design of optimal output disturbance cancellation controllers is discussed. A target recoverable by the partial LTR procedure is identified as an output injection with a frequency-shaped gain matrix. The partial LTR result is used to clarify system-theoretic meaning of enforcing the minimum phase LTR procedure. It is shown that the partial LTR procedu...

Journal: :The Journal of antimicrobial chemotherapy 2010
Sandrine Reigadas Marie-Line Andréola Linda Wittkop Ophélie Cosnefroy Guerric Anies Patricia Recordon-Pinson Rodolphe Thiébaut Bernard Masquelier Hervé Fleury

OBJECTIVES Our aim was to analyse the evolution of HIV-1 2-long terminal repeat (2-LTR) circular DNA in vitro and ex vivo in the presence of raltegravir. PATIENTS AND METHODS Twenty-five patients starting a raltegravir-based regimen were included. Total HIV-1 DNA and 2-LTR DNA were quantified at baseline and in follow-up samples up to month 12. The effect of raltegravir on the formation of 2-...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه ارومیه - دانشکده کشاورزی 1390

تنوع ژنتیکی گیاهان زراعی با گذشت زمان کاهش پیدا کرده است. ارزیابی تنوع ژنتیکی در کارایی حفاظت از ژرم پلاسم وکاربرد آن حائز اهمیت می باشد (رشیدی و همکاران , 1386) . آگاهی دقیق از تنوع ژنتیکی مجموعه های ژنتیکی ضمن حفظ ذخایر ژنتیکی، قابلیت استفاده از آنها را در برنامه های اصلاحی تسهیل می نماید(mohamadi and prasna,2003 ). مطالعه تنوع ژنتیکی فرایندی است که تفاوت بین افراد، جمعیتها و یا گروهها با است...

2015
In-Bae Jang Dae-Young Lee Jin Yu Hong-Woo Park Hwang-Sung Mo Kee-Choon Park Dong-Yun Hyun Eung-Ho Lee Kee-Hong Kim Chang-Sik Oh

BACKGROUND Ginseng is a semishade perennial plant cultivated in sloping, sun-shaded areas in Korea. Recently, owing to air-environmental stress and various fungal diseases, greenhouse cultivation has been suggested as an alternative. However, the optimal light transmission rate (LTR) in the greenhouse has not been established. METHODS The effect of LTR on photosynthesis rate, growth, and gins...

Journal: :The Journal of general virology 2007
Masahide Horiba Lindsey B Martinez James L Buescher Shinji Sato Jenae Limoges Yunquan Jiang Clinton Jones Tsuneya Ikezu

It has previously been shown by our laboratory that OTK18, a human immunodeficiency virus (HIV)-inducible zinc-finger protein, reduces progeny-virion production in infected human macrophages. OTK18 antiviral activity is mediated through suppression of Tat-induced HIV-1 long terminal repeat (LTR) promoter activity. Through the use of LTR-scanning mutant vectors, the specific regions responsible ...

2013
Shu-Ye Jiang Srinivasan Ramachandran

Long terminal repeat (LTR) retrotransposons are the major class I mobile elements in plants. They play crucial roles in gene expansion, diversification and evolution. However, their captured genes are yet to be genome-widely identified and characterized in most of plants although many genomes have been completely sequenced. In this study, we have identified 7,043 and 23,915 full-length LTR retr...

Journal: :Journal of virology 1991
J D Morrey S M Bourn T D Bunch M K Jackson R W Sidwell L R Barrows R A Daynes C A Rosen

UV irradiation has been shown to activate the human immunodeficiency virus type 1 (HIV-1) long terminal repeat (LTR) in cell culture; however, only limited studies have been described in vivo. UV light has been categorized as UV-A (400 to 315 nm), -B (315 to 280 nm), or -C (less than 280 nm); the longer wavelengths are less harmful but more penetrative. Highly penetrative UV-A radiation constit...

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