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مبدل های آنالوگ به دیجیتال با سرعت بالا و دقت پایین (چهار بیت) در ارتباطات پهن باند ، لینک های سریال ، گیرنده مبتنی بر مدولاسیون ofdm و گیرنده چند باندی مبتنی بر مدولاسیون ofdm مورد استفاده قرار می گیرد. در این پایان نامه سعی شده است که یک مبدل آنالوگ به دیجیتال از نوع تقریب متوالی با دقت 4 بیت و سرعت 715 مگاهرتز طراحی و شبیه سازی شود. پیکربندی استفاده شده برای این مبدل از نوع 2-bit/step می باش...
An extensive analysis of the Maria family is presented. A reconstruction of the original ejection velocity eld of the fragments suggests that a substantial amount of relatively large fragments has been probably injected into the neighbouring 3/1 mean motion resonance with Jupiter. This is also con rmed by an analysis of the size distribution of the family, suggesting that about 10 objects in th...
Although vascular malformations have been found in every organ, hemangioma of the colon and rectum are rare. Misdiagnosis often occurs because of lack of awareness of classic clinical features. We report a case of hemangioma involving the rectum. This 17-years-old man presented with intermittent abdominal pain for one year. CT scanning revealed a large mass occupies the lower abdomen and pelvic...
If the objects responsible for gravitational microlensing of Galactic-bulge stars are faint dwarfs, then blended light from the lens will distort the shape of the microlensing light curve and shift the color of the observed star during the microlensing event. In most cases, the resolution in current microlensing surveys is not accurate enough to observe this color-shift effect. However, such si...
A thorough search for Ultraluminous X-ray source candidates within the Local Volume is made. The search spatially matches potential ULXs detected in X-ray images or cataloged in the literature with galaxies tabulated in the Catalog of Neighboring Galaxies compiled by Karachentsev et al. (2004). The specific ULX frequency (occurrence rate per unit galaxy mass) is found to be a decreasing functio...
Giant Cavernous Haemangioma of the Anterior Mediastinum Anterior Mediastende Dev Kavernöz Hemanjiom
Cavernous hemangiomas of the anterior mediastinum is rare. We present a case of a 56-year-old male patient with a giant cavernous hemangioma of the anterior mediastinum, 18 cm in diameters, approached by left posterolateral thoracotomy. To the best of our knowledge, such a unique case has not been previously presented in the literature.
With the fast growth of Linked Data, many datasets have been made available for public access. However, with an increased number of elderly and people with disabilities becoming technologically knowledgeable, it has been noted that few applications have been developed for this population group using Linked Data. In this paper, we present RailGB, a linked-data driven mobile web application to pr...
Population aging poses a challenge to the fiscal sustainability of social security systems around the world. As Baby-boomer generations approach retirement, governments have begun reforming key parameters of the social security systems. However, the behavioural and welfare impacts of many reforms are not well understood in part due to the di culty of isolating exogenous variation in program par...
From deep CCD observations of the cluster Abell 2554 we have recovered the cluster’s luminosity distribution over a wide range of magnitude (−24 < MR < −16). We compare the derived A 2554 cluster luminosity function (at redshift 0.1) with that of the local Coma Cluster (A 1656) and the more distant (z = 0.2) cluster A 963. The distribution is remarkably similar for these three clusters of compa...
guidelines sentDecember 6, 2011 SBC2012 abstract deadline January 15, 2012 Phase II announcedApril 22, 2012 Data submission guidelines sent May 12, 2012 Data submission deadline June 15, 2012 SBC2012 workshopJune 21, 2012Journal of Biomechanical Engineering. Received November 07, 2012;Accepted manuscript posted Janurary 21, 2013. doi:10.1115/1.4023382Copyright (c) 2012 b...
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