نتایج جستجو برای: npg
تعداد نتایج: 335 فیلتر نتایج به سال:
Preconditioning and Regularization Enable Faster Reinforcement Learning Natural policy gradient (NPG) methods, in conjunction with entropy regularization to encourage exploration, are among the most popular optimization algorithms contemporary reinforcement learning. Despite empirical success, theoretical underpinnings for NPG methods remain severely limited. In “Fast Global Convergence of Poli...
Nanoporous Au (NPG) prepared by dealloying is one of the most used substrates for surface-enhanced Raman scattering (SERS). The morphology tailoring NPG to obtain both ultrafine pores and suitable Au/Ag ratio great importance acquiring enhanced SERS performance. Compared with chemical dealloying, electrochemical can tailor be more flexible additional adjustment voltage current. Thus, further un...
Herein, the effects of nanostructured modifications a gold electrode surface in development electrochemical sensors for L-ascorbic acid detection have been investigated. In particular, bare has modified by electrodeposition single-walled carbon nanotubes (Au/SWCNTs) and formation highly nanoporous (h-nPG) film. The procedure realized sweeping potential between +0.8 V 0 vs. Ag/AgCl 25 scans susp...
This article explores where the increasing adoption of SIBs and outcomes-based contracting may lead public service systems—toward New Public Governance, or ‘back’ to Management. We present analysis from first significant longitudinal qualitative study a major UK SIB focused on improving outcomes in context social determinants health analyze how two governance logics manifest interact across lif...
PURPOSE Circulating estrogen levels are relevant in glaucoma phenotypic traits. We assessed the association between an estrogen metabolism single nucleotide polymorphism (SNP) panel in relation to primary open angle glaucoma (POAG), accounting for gender. METHODS We included 3,108 POAG cases and 3,430 controls of both genders from the Glaucoma Genes and Environment (GLAUGEN) study and the Nat...
CONTEXT The insulin tolerance test (ITT) is the gold standard for assessment of the pituitary adrenal axis but its use is limited because of concerns relating to the risk of hypoglycaemia. OBJECTIVE This study examined the depth and duration of hypoglycaemia achieved during the test in a large cohort of patients. DESIGN Two hundred and twenty ITTs were performed from 2005 to 2010. SETTING...
When wild type (wt) tobacco (Nicotiana tabacum L. cv. Petit Havana SR1) suspension cells were grown under phosphate (P) limitation, they contained large amounts of mitochondrial alternative oxidase (AOX). When these cells were resupplied with P, there was a large, immediate and sustained stimulation of respiration to support a period of rapid P uptake. Two lines of evidence suggest that the abu...
Nanoporous gold (NPG) made by dealloying takes the form of a network nanoscale struts or “ligaments”. It is well established that material’s mechanical behavior strongly affected its ligament size, L and solid volume fraction, ?. We explore NPG, with an emphasis on establishing consistent data set comparable but covering significant range initial Specimens are prepared from Ag-Au master alloys ...
An efficient use of the radio resources in wireless communications presents a fundamental challenge. While power is one of the most important radio resources, and its control has been studied extensively for voice communications, the increase demand of wireless data service makes it very important to establish power control algorithms for such service. In Code Division Multiple Access (CDMA) ce...
Cytochrome P450 enzymes catalyze selective oxidation of a wide variety of hydrophobic substrates.1 The low-temperature crystal structure P450 BM-32 bound to N-palmitoylglycine (NPG) shows the substrate bound distant to the iron in a position that is evidently unproductive for chemistry. UV-vis absorbance measurements indicating a spin-state transition and associated studies3 of cytochrome P450 ...
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