نتایج جستجو برای: pon
تعداد نتایج: 1631 فیلتر نتایج به سال:
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...
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...
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...
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...
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...
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...
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...
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...
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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