نتایج جستجو برای: pon

تعداد نتایج: 1631  

ژورنال: :مجله دانشگاه علوم پزشکی اراک 0
ستاره بهروزی setareh behroozi department of biology, faculty of sciences, university of guilan, rasht, iranگروه زیست شناسی، دانشگاه گیلان، رشت، ایران فرهاد مشایخی farhad mashayekhi department of biology, faculty of sciences, university of guilan, rasht, iranگروه زیست شناسی، دانشگاه گیلان، رشت، ایرانسازمان اصلی تایید شده: دانشگاه گیلان (guilan university) محمد هادی بهادری mohammad hadi bahadori department of anatomy, faculty of medicine, guilan university of medical sciences, rasht, iranگروه آناتومی، دانشکده پزشکی، دانشگاه گیلان، رشت، ایرانسازمان اصلی تایید شده: دانشگاه گیلان (guilan university)

زمینه و هدف: ناباروری یک بیماری سیستم تولید مثلی است که به صورت عدم بارداری بعد از 12 ماه رابطه جنسی منظم بدون استفاده از روش های پیش گیری تعریف می شود. ناباروری مردان تقریبا در 15 درصد زوجین دیده می شود که فاکتورهای محیطی و ژنتیکی در بروز آن نقش دارند. پاراکسوناز یک آنزیم آنتی اکسیدانی است که نقش مهمی در بیماری های مختلف داشته و با استرس اکسیداتیو و متابولیسم لیپید در ارتباط است. خانواده پاراک...

2016
Sema Koç Servet Akyüz Battal Tahsin Somuk Harun Soyalic Beyhan Yılmaz Abdullah Taskin Hasan Bilinc Nurten Aksoy

BACKGROUND AND OBJECTIVES The aim of this study was to investigate serum paraoxanase-1 (PON) activity, total oxidant status (TOS), total antioxidant status (TAS), and the oxidative stress index (OSI) in tinnitus; and to compare the results with data from healthy subjects. SUBJECTS AND METHODS A total of 114 subjects-54 patients with tinnitus and 60 healthy controls were enrolled in this study...

2009
J. S. Vardakas V. G. Vassilakis M. D. Logothetis

Passive Optical Network (PONs) are becoming a mature concept for the provision of enormous bandwidth to endusers with low cost. In this paper we study the call-level performance of two PON configurations: the OCDMA-PON and the Hybrid WDM-OCDMA PON. We propose analytical models for calculating connection failure probabilities (due to unavailability of a wavelength) and call blocking probabilitie...

2006

A wet-oxidation method is presented for determining simultaneously particulate organic carbon (POC), particulate organic nitrogen (PON) and particulate organic phosphorus (POP) collected on filters. Conversion of POC, PON and POP to inorganic products, carbon dioxide, nitrate+nitrite and soluble reactive phosphate respectively, is performed by a persulfate wet-oxidation in slight alkaline condi...

1997
Y. Kajiyama Y. Takigawa S. Aoyagi Yasuyuki Okumura

An ATM-PON system for an access network is proposed to support multimedia service efficiently. An ATM emulation layer (ATME) is newly defined above the PON section layer and placed on the same level as the ATM layer to carry ATM payload directly. The bi-directional 54 byte cell format including 6 byte header realizes high throughput. The grant for upstream transmission is controlled by VP level...

Journal: :Optics express 2010
Hoon-Keun Lee Ho-Sung Cho Joon-Young Kim Chang-Hee Lee

We investigate a high capacity WDM-PON based on wavelength-locked Fabry-Perot laser diodes. A color-free transmission of 2.5 Gb/s per channel is achieved with a polarization independent F-P LD and a decision threshold control circuit at the receiver. Then, we demonstrate an 80 Gb/s capacity (2.5 Gb/s x 32 channels) WDM-PON with transmission length of 20 km. We also investigate impairments in tr...

Journal: :Psycho-oncology 2015
Gillian Prue Olinda Santin

Publisher rights Copyright © 2015 John Wiley & Sons, Ltd. This is the peer reviewed version of the following article: Prue, G., and Santin, O. (2015) HPV vaccine acceptance in male adolescents. Psycho-Oncology, doi: 10.1002/pon.3961, which has been published in final form at http://onlinelibrary.wiley.com/doi/10.1002/pon.3961/abstract. This article may be used for non-commercial purposes in acc...

2013
Sonia Rani Ashok Kumar

This paper proposes a Bandwidth Utilization in wavelength-divisionmultiplexed passive optical network (WDM-PON) subject to requirements of fairness, efficiency, and cost. An Optical Line Terminal (OLT)-centric bandwidth allocation model is proposed which employs a credit pooling technique combined with a weighted-share policy to partition the upstream bandwidth among different classes of servic...

2015
Chi-Wai Chow

It is now well known that there are various technologies for broadband access providing high-speed Internet access and triple-play services including data, voice, and video. Most well-established broadband access platforms now are digital subscriber line (DSL)-based and the Cable Modem-based. It is generally agreed that fiber-to-the-home (FTTH) provides the bandwidth and flexibility in upgrades...

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