نتایج جستجو برای: کاواک l3

تعداد نتایج: 6006  

ژورنال: :پژوهش فیزیک ایران 0
خسرو مبهوتی kh mabhouti department of physics, faculty of sciences, urmia university, urmia, iranپیاده سازی مدولاتور الکترو اپتیکی دامنه در کاواک خارجی لیزر نیمرسانا برای تولید حالت های پریودیک و کنترل ناپایداری اکبر جعفری a jafari department of physics, faculty of sciences, urmia university, urmia, iranپیاده سازی مدولاتور الکترو اپتیکی دامنه در کاواک خارجی لیزر نیمرسانا برای تولید حالت های پریودیک و کنترل ناپایداری

در این مقاله با قرار دادن مدولاتور الکترو اپتیکی در کاواک خارجی یک لیزر نیمرسانا و مدوله کردن پسخوراند اپتیکی، تغییرات دینامیک شدت خروجی لیزر  مورد مطالعه قرار گرفته است. این امر به وسیله نمودارهای دوشاخه شدگی و تحول زمانی نسبت به پارامترهای ضریب دامنه مدولاسیون اعمال شده و فرکانس ولتاژ مدولاسیون مربوط به مدولاتور الکترو اپتیکی به صورت عددی مورد آنالیز قرار گرفته است. در این مطالعه نشان دادیم ک...

Journal: :American journal of physiology. Regulatory, integrative and comparative physiology 2011
Carla R Bromati Camilo Lellis-Santos Tatiana S Yamanaka Tatiane C A Nogueira Mauro Leonelli Luciana C Caperuto Renata Gorjão Adriana R Leite Gabriel F Anhê Silvana Bordin

Endocrine pancreas from pregnant rats undergoes several adaptations that comprise increase in β-cell number, mass and insulin secretion, and reduction of apoptosis. Lactogens are the main hormones that account for these changes. Maternal pancreas, however, returns to a nonpregnant state just after the delivery. The precise mechanism by which this reversal occurs is not settled but, in spite of ...

2017
Sang Joon Park Jae Young Jang Soung Won Jeong Young Kyu Cho Sae Hwan Lee Sang Gyune Kim Sang-Woo Cha Young Seok Kim Young Deok Cho Hong Soo Kim Boo Sung Kim Suyeon Park Hae In Bang

Alpha-fetoprotein (AFP), Lens culinaris-agglutinin-reactive fraction of AFP (AFP-L3), and protein induced by vitamin K absence or antagonist-II (PIVKA-II) are widely used as tumor markers for the diagnosis of hepatocellular carcinoma (HCC). This study compared the diagnostic values of AFP, AFP-L3, and PIVKA-II individually and in combination to find the best biomarker or biomarker panel.Seventy...

2017
Jian-Feng Cai Tianming Wang Ke Wei

We establish theoretical recovery guarantees of FIHT for multi-dimensional spectrally sparse signal reconstruction problems, which are straightforward extensions of what we have proved for one-dimensional signals in [1]. Assume the underlying multi-dimensional spectrally sparse signal is of model order r and total dimensionN . We show that O(r log(N)) number of measurements are sufficient for F...

پایان نامه :دانشگاه بین المللی امام خمینی (ره) - قزوین - دانشکده علوم انسانی و پایه 1393

لیزرها دارای کاواک هستند. و کاواک ها به دو نوع پایدار و ناپایدار دسته بندی می شوند. مزیت کاواک های ناپایدار حجم مد بزرگتر و قابلیت تمییز پذیری در مدهای مرتبه بالاتر است. در لیزرها به خصوص لیزرهای گازی برای بالا بردن کیفیت پرتو خروجی راههای مختلفی وجئد دارد از جمله قرار دادن یک دریچه ی محدودکننده درون کاواک که در این پایان نامه بدان اشاره شده است.

2013
Yu Sasaki Yasuchika Aoki Arata Nakajima Yoshifumi Shibata Masato Sonobe Kazuhisa Takahashi Seiji Ohtori Koichi Nakagawa

We report an 85-year-old woman with an L3 vertebral body fracture who presented with back pain, bilateral leg pain, and weakness after four months of conservative treatment. Because of unstable pseudoarthrosis, the L3 vertebral body collapsed in the standing position and the L3 nerve root was compressed. The indicated surgery decompressed the L3-L4 foramen and fused the unstable segment. The ba...

Journal: :Revista do Instituto de Medicina Tropical de Sao Paulo 1999
L M Richinitti N A Fonseca C Graeff-Teixeira

Third stage larvae (L3) from Angiostrongylus costaricensis were incubated in water at room temperature and at 5 degrees C and their mobility was assessed daily for 17 days. Viability was associated with the mobility and position of the L3, and it was confirmed by inoculation per os in albino mice. The number of actively moving L3 sharply decreased within 3 to 4 days, but there were some infecti...

Journal: :Annales de recherches veterinaires. Annals of veterinary research 1987
S Mallet M C Lesage

A stock of Trichostrongylus colubriformis infective larvae (L3) was stored for up to 15 weeks at 24 degrees C. At three weeks intervals, samples of L3 were taken to assess exsheathment rate and enzyme activity Leucine Amino Peptidase (LAP) and Alkaline Phosphatase (AP). From 0 to 9 weeks of storage, a decrease in enzyme activity was observed correlated with a decrease in exsheathment rate (perc...

Journal: :Graphs and Combinatorics 2000
Arie Bialostocki Daniel Schaal

For every mV 3, let n ˆ R…L3…m†† be the least integer such that for every 2-coloring of the set S ˆ f1; 2; . . . ; ng, there exists in S a monochromatic solution to the following system. L3…m†: x1 ‡ x2 ‡ ‡ xmÿ1 < xm x1 < x2 < < xm: The main result of this paper is that R…L3…m†† ˆ 9 16 m ÿm2 ‡m‡ 1 if m1 0 …mod 4† 9 16 m ÿm2 ‡ 13 16 m‡ 13 8 if m1 1 …mod 4† 9 16 m ÿm2 ‡m‡ 1 2 if m1 2 …mod 4† 9 16 ...

Journal: :Parasitology 1999
S J Hunter S A Martin F J Thompson L Tetley E Devaney

A cDNA library constructed from 3 day post-infective L3 of the filarial nematode Brugia pahangi was screened by differential hybridization with cDNA probes prepared from different life-cycle stages. Five cDNA clones hybridizing selectively to the mosquito-derived L3 probe were isolated and characterized. Northern blot analysis of 4 of the clones confirmed that each was most highly expressed in ...

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