نتایج جستجو برای: molecular diode

تعداد نتایج: 655445  

2002
David P. Nackashi Paul D. Franzon

Recently, several mechanisms have been proposed as a basis for designing molecular electronic logic switching elements. Many two terminal molecular devices functioning as diodes have been synthesized with responses similar to silicon devices such as rectifying and resonant tunneling diodes. In this paper, the feasibility of integrating these molecular diodes into current circuit architectures i...

A. Sharafi, A. Shirazi, Gh. Geraily, M. Allahverdi, M. Esfehani,

Background: Total Body Irradiation (TBI) is different from standard radiotherapy in many aspects, so it is not easy to predict the delivered dose to the patient under TBI treatment. Diode dosimetry procedures for surface dose reading can help to define variations of the actually delivered dose from the prescribed one. The aim of this study was to describe the measurements made to calib...

2005
B. L. Volodin S. V. Dolgy E. D. Melnik E. Downs J. Shaw V. S. Ban

Volume Bragg gratingTM (VBGTM) technology has been shown to improve spectral characteristics of the high-power laser diodes and arrays. We review the recent advances in VBG technology that lead to better spectral performance as well as improvements in spatial brightness of the high-power laser diode arrays. The VBG technology has been applied to manufacturing of high-power laser diode arrays su...

2008
Suhaidi Shafie Shoji Kawahito Shinya Itoh

A dynamic range expansion technique for CMOS image sensors with dual charge storage in a pixel and multiple sampling technique is presented. Each pixel contains a photodiode and a storage diode which is connected to the photodiode via a separation gate. The sensitivity of the signal charge in the storage diode can be controlled either by a separation gate which limits the charge to flow into th...

2011
Stephane Schilt Frank K. Tittel Konstantin P. Petrov

6 Conclusion 23 Acknowledgments 23 Abbreviations and Acronyms 23 Related Articles 24 References 24 Modern diode laser spectroscopy is becoming an important and a more widely used tool for detection and measurement of trace gases. The change is driven by the recent advances in diode laser technology and diode laser frequency conversion techniques, which now push the limits of emission wavelength...

Journal: :journal of lasers in medical sciences 0
reza fekrazad laser research center in medical sciences (lrcms), aja university of medical sciences- laser research center of dentistry (lrcd), school of dentistry, tehran university of medical sciences, tehran, iran katayoun am kalhori laser research center in medical sciences (lrcms), aja university of medical sciences- laser research center of dentistry (lrcd), school of dentistry, tehran university of medical sciences, tehran, iran nasim chiniforush laser research center of dentistry (lrcd), school of dentistry, tehran university of medical sciences, tehran, iran

vascular lesions rise from abnormalities in blood vessels or endothelial proliferation . capillary hemangiomas are formed by small capillaries surrounded by a layer of endothelial cells in a connective tissue stroma . various treatments are used for these conditions like excisional surgery , sclerotherapy, and recently laser irradiation. in this case study, we report successful treatment of int...

Journal: :journal of lasers in medical sciences 0
mohammad asnaashari department of endodontic, school of dentistry, shahid beheshti university of medical sciences, tehran, iran saranaz azari-marhabi department of oral medicine, school of dentistry, shahid beheshti university of medical sciences, tehran, iran somayeh alirezaei department of oral medicine, school of dentistry, shahid beheshti university of medical sciences, tehran, iran nikoo asnaashari laser application in medical sciences research center, shahid beheshti university of medical sciences, tehran, iran

introduction: several treatment options have been introduced for removal of gingival hyperplasic lesions, but using diode lasers have many advantages such as less bleeding, time saving, better shaping, improved healing and less complication for the patients. case: a 15-year-old girl with multiple fibroma-like lesions in the oral cavity, who had a medical history of tuberous sclerosis, was selec...

1999
Carl E. Wieman Leo Hollberg

We present a review of the use of diode lasers in atomic physics with an extensive list of references. We discuss the relevant characteristics of diode lasers and explain how to purchase and use them. We also review the various techniques that have been used to control and narrow the spectral outputs of diode lasers. Finally we present a number of examples illustrating the use of diode lasers i...

Introduction Evaluation of the delivered dose of externally wedged photon beams by external diode dosimeters during the treatment process requires the estimation of exit surface dose correction factors in various wedge angles and field sizes. Materials and Methods A system of absorbed dose evaluation, using p-type diode dosimeters placed on the exit surface of a phantom, was characterized for e...

1998
ERIC R. CARLSON

Abstruct-The two-diode subfmrmordcallypumped stripline mixer hasa pair of diodesshunt mounted with oppositepolarities in a striplfne circuit betweenthe sigsudand local oscillator inputs. The circuit haslow noiseand conversion10ssand substantialAM local oscillator noise cancellation.The load oscfflator frequency is abmsthaff the signal frequency.A novel diode chip, the notch-front dfodq which ha...

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