نتایج جستجو برای: enhancement ratio

تعداد نتایج: 621077  

Journal: :Environmental Health Perspectives 1989
Arthur C. Upton

-Enhancement of CCNU cytotoxicity by misonidazole (MISO) was studied in three tumours and two normal tissues in the mouse. The 3 experimental tumours (SCCVII/St, EMT6 and KHT) showed very different sensitivities to CCNU alone, but MISO enhanced the cell killing in ech case. The effect was not always dose-modifying, so that the CCNU dose range for the greatest enhancement was different in each o...

The problem under investigation contains a computational simulation of a specific heat exchanger with complex geometry fins. The problem solved is potentially interesting for researchers and engineers working on solar collectors and aerospace industry. It is known that heat transfer enhancement can be achieved by creating longitudinal vortices in the flow. These vortices can be generated by arc...

2012
H. Kasban O. Zahran H. Arafa M. S. Elaraby F. E. Abd El-Samie

This paper presents some image processing techniques that can be used for radiographic image enhancement. Contrast enhancement, filtering, denoising, and interpolation processes are carried out in this paper. Contrast enhancement is carried out using adaptive histogram equalization. Filtering is carried out using median, Wiener, Lee, and Kuan filters. Wavelet and curvelet transforms are used fo...

2015
Akansha Elisha George Rajeev Paulus A. K. Jaiswal W. Kaiser G. Pottie M. Srivastava

Heterogeneous wireless sensor network (H-WSN) consists of sensor nodes with different ability, such as different computing power and sensing range. In this Research paper, the improved enhance coverage overlapping sensing ratio (I-ECOSR) scheme for data aggregation in grid based WSNs is proposed. Here, the focus was on two main problems i.e. in the area coverage problem, the coverage performanc...

Journal: :AJNR. American journal of neuroradiology 2010
H S Seo J-h Kim D H Lee Y H Lee S-i Suh S Y Kim D G Na

BACKGROUND AND PURPOSE Most intramedullary astrocytomas have been known to exhibit at least some enhancement on MR imaging regardless of cell type or tumor grade. The purpose of this study was to evaluate the incidence of nonenhancing intramedullary astrocytomas through a retrospective study within our institutions and a systematic review of the medical literature. MATERIALS AND METHODS A tot...

2014
Sami D. Salman Abdul Amir H. Kadhum Mohd S. Takriff Abu Bakar Mohamad

Numerical investigation has been carried out on heat transfer and friction factor characteristics of copper-water nanofluid flow in a constant heat-fluxed tube with the existence of new configuration of vortex generator using Computational Fluid Dynamics (CFD) simulation. Two types of swirl flow generator: Classical twisted tape (CTT) and Parabolic-cut twisted tape (PCT) with a different twist ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه کاشان - دانشکده ادبیات و زبانهای خارجی 1394

cohesion is an indispensable linguistic feature in discourse analysis. lexicald such a differe cohesion and conjunction in particular as two crucial elements to textual cohesion and comprehension has been the focus of a wide range of studies up to now. yet the relationship between the open register and cohesive devices has not been thoroughly investigated in discourse studies. this study concen...

Journal: :iranian journal of radiology 0
sima nikneshan department of oral and maxillofacial radiology, dental faculty, shahid beheshti university of medical sciences, tehran, iran sudeh mohseni department of oral and maxillofacial radiology, dental faculty, kerman university of medical sciences, kerman, iran mahtab nouri department of orthodontics, dental faculty, shahid beheshti university of medical sciences, tehran, iran hoora hadian department of oral and maxillofacial radiology, dental faculty, mazandaran university of medical sciences, sari, iran; department of oral and maxillofacial radiology, dental faculty, mazandaran university of medical sciences, sari, iran. tel: +98-113405474 mohammad javad kharazifard dental research center, dentistry research institute, tehran university of medical sciences, tehran, iran

background evaluation of the craniofacial bones is the oldest method to measure the facial proportion ratio in orthodontics. objectives the purpose of this study was to evaluate the effect of emboss enhancement on the reliability of landmark identification in digital lateral cephalometric images. materials and methods ten digital lateral cephalograms were selected from the archive of an oral an...

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