نتایج جستجو برای: phase detector pd

تعداد نتایج: 706375  

2016
Somnath Kundu Bongjin Kim Chris H. Kim

Multiplying delay-locked loops (MDLLs) are gaining popularity due to their superior noise performance over conventional phase-locked loops (PLLs) [1,2]. Recent designs are trending towards an all-digital implementation that provides advantages such as compact area, good scalability and low power compared to traditional analog implementations. Achieving fractional frequency multiplication is, ho...

2011
Alexandra Gaenslen Irene Swid Inga Liepelt-Scarfone Jana Godau Daniela Berg

BACKGROUND Before the occurrence of motor symptoms permits the clinical diagnosis of Parkinson's disease (PD), about or even more than 50% of the dopaminergic neurons of the substantia nigra have degenerated. This time be called the prodromal phase of PD. OBJECTIVE To evaluate the time span from onset of first prodromal symptoms to the initial diagnosis of PD as well as the order of symptom o...

2016
William Paul Huhn Michael Widom Michael C. Gao

As an aid to the development of hydrogen separation membranes, we predict the temperature dependent phase diagrams using first principles calculations combined with thermodynamic principles. Our method models the phase diagram without empirical fitting parameters. By applying thermodynamic principles and solid solution models, temperature-dependent features of the Cu-Pd-S system can be explaine...

Journal: :Journal of the American Chemical Society 2010
Yong Ding Fengru Fan Zhongqun Tian Zhong Lin Wang

Using a two-step seed-mediated growth method, we synthesized bimetallic nanoparticles (NPs) having a gold octahedron core and a palladium epitaxial shell with controlled Pd-shell thickness. The mismatch-release mechanism between the Au core and Pd shell of the NPs was systematically investigated by high-resolution transmission electron microscopy. In the NPs coated with a single atomic layer of...

Journal: :Optics letters 1989
S Y Huang H G Park B Y Kim

We present a novel design for quadrature phase detection utilizing two-mode optical waveguides for optical interferometric systems. A pair of interferometric signals having quadrature optical phase information can be obtained from the near-field and far-field patterns of a two-mode waveguide output. The operational principle is based on a pi/2 differential phase shift between two modal beams oc...

Journal: :European review for medical and pharmacological sciences 2014
S-F Wu Z-F Zhu Y Kong H-P Zhang G-Q Zhou Q-T Jiang X-P Meng

OBJECTIVE The overall goal of this study was to evaluate the usability of the susceptibility weighted imaging (SWI) in (1) assessment of iron deposition to enhance our ability to detect PD in the early phase and (2) in estimation of the degree of PD. PATIENTS AND METHODS SWI scans were carried out in 54 patients with PD (18 patients with the Hoehn-Yahr scale < 1.5 and 36 patients with the Hoe...

Journal: :Analytical sciences : the international journal of the Japan Society for Analytical Chemistry 2003
Yasutada Suzuki Hiroyuki Hori Masaaki Iwatsuki Takeshi Yamane

A four-channel absorbance detector was developed for simplifying the flow-injection analysis (FIA). This detector used four light-emitting-diodes (LEDs) as light sources; their wavelengths were 470, 495, 590 and 635 nm, respectively. Their amplitudes were modulated electronically with different frequencies. The light emissions from them were merged by plastic-core fiber optics, and were detecte...

Journal: :trauma monthly 0
parisa sedaghati department of sport injuries and corrective exercise , university of guilan, rasht, ir iran hassan daneshmandi department of sport injuries and corrective exercise , university of guilan, rasht, ir iran; department of sport injuries and corrective exercise, university of guilan, rasht, ir iran. tel: +98-7644433661, fax: +98-7644433661 noureddin karimi department of physical therapy, university of social welfare and rehabilitation sciences, tehran, ir iran amir-hossein barati department of exercise physiologies, shahid rajaee teacher training university, tehran, ir iran

objectives to explore the effect of a selective 10-week corrective exercise with an emphasis on gait training activities (gta) on the number of falls (nofs), fear of falling, functional balance, timed up and go (tug) test among pd patients. background posture instability and unsteady gait disorders in parkinson’s disease (pd) usually contribute to fall-related fractures. fall-related trauma in ...

2008
Akram Abu-aisheh Hisham Alnajjar

Amplified Spontaneous Emission (ASE) noise mitigation from a pre-amp Erbium Doped Fiber Amplifier (EDFA) to the Photon Detector (PD) in optical receivers can be reduced by minimizing the EDFA ASE noise at the optical receiver level to achieve optimal optical receiver transmission performance. The photon detector used in optical receivers is either a PIN diode or an avalanche photo diode (APD). ...

2007
P. A. Mosier-Boss S. Szpak

The use of CR-39, a solid state nuclear track detector, to detect the emission of energetic charged particles during Pd/D co-deposition is demonstrated. The pits observed in the CR-39 are attributed to the Pd/D cathode and are not due to radionuclide contamination in the cell components; nor to the impingement of D2 bubbles on the surface of the CR-39; nor to chemical attack by D2, O2, or Cl2. ...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید