نتایج جستجو برای: ndr

تعداد نتایج: 534  

Journal: :Frontiers in Microbiology 2021

Diabetic retinopathy (DR) has been reported to associate with gut microbiota alterations in murine models and thus “gut-retina-axis” proposed. However, the role of microbiome associated metabolism DR patients still need be elucidated. In this study, we collected fecal samples from 45 proliferative diabetic (PDR) 90 matched (1:2 according age, sex, duration diabetes) without (NDR) performed 16S ...

Journal: :ACS applied electronic materials 2023

Active memristor elements, also called neuristors, are self-oscillating devices that very good approximations to biological neuronal functionality and crucial the development of low-power neuromorphic hardware. Materials showing conduction mechanisms depend superlinearly on temperature can lead negative differential resistance (NDR) regimes, which may further be engineered as self-oscillators. ...

پایان نامه :دانشگاه آزاد اسلامی - دانشگاه آزاد اسلامی واحد تهران مرکزی - دانشکده علوم پایه 1390

در اینجا ما سیستمی را بررسی می کنیم که شامل یک ملکول (70،60 n= ) cn می باشد که با اتم های منفرد یا متعدّد به الکترود های فلزی تک بعدی متّصل شده اند. اثرات دوپاره شدن پیوند، تماس ها و برهمکنش کولمب روی رسانایی الکترون با استفاده از تکنیک تابع گرین غیر تعادلی ( negf ) آموزش داده می شوند. نتایج ما نشان داد که حضور برهمکنش کولمب، قلّه های ضرایب انتقال و مقاومت تفاضلی منفی ( ndr ) را به انرژی های بالات...

Journal: : 2023

The effectiveness of scientific development and research (NDR) in the agricultural sector depends on many factors, among which those that determine safety process itself play a special role. work examines requirements for ensuring safe harmless working conditions during development, indicating main legislative other normative legal acts relevant areas. Depending features NDR (fundamental, appli...

2008
Andrzej J. Buras Andrzej Czarnecki Jörg Urban

We evaluate the important two–loop matrix element 〈sγ|Q2|b〉 of the operator (c̄γPLb) (s̄γμPLb) contributing to the inclusive radiative decay B → Xsγ. The calculation is performed in the NDR scheme, by means of asymptotic expansions method. The result is given as a series in z ≡ m2c/m2b up to O(z6). We confirm the result of Greub, Hurth and Wyler obtained by a different method up to O(z3). Higher–...

2005
Chien M. Ta Fujiang Lin Subhash R. Chander

− Tunnel diode I-V characteristics were measured (Figure 1.) − Mathematical manipulations were then carried out on the measured data to roughly estimate the function that could be used to describe the I-V characteristic curves. − First model was proposed and revised until a rough match between the measured data and simulated data was obtained. − The final model is a voltage-controlled current s...

Journal: :Physica Status Solidi A-applications and Materials Science 2023

Resistive Random-Access Memory Devices Neuromorphic devices are essential for beyond von-Neumann computing and Random Access Memories (RRAMs) the backbone it. In article number 2200744, Chandra Prakash colleagues show RRAM characteristics in a Bi12FeO20 system first time, together with negative differential resistance (NDR) write once read many (WORM) like simultaneously. It is hoped this could...

2002
N. Garron L. Giusti C. Hoelbling L. Lellouch C. Rebbi

We present an exploratory calculation of the standard model ∆S = 2 matrix element relevant for indirect CP violation in K → ππ decays. The computation is performed with overlap fermions in the quenched approximation at β = 6.0 on a 16 3 × 32 lattice. The resulting bare matrix element is renormalized non-perturbatively. Our preliminary result is B NDR K (2 GeV) = 0.61(7), where the error does no...

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