Literature data on benthic dissolved iron (DFe) fluxes (μmolm 2 d ), bottom water oxygen concentrations (O2BW, μM), and sedimentary carbon oxidation rates (COX, mmolm 2 d ) from water depths ranging from 80 to 3700m were assembled. The data were analyzed with a diagenetic iron model to derive an empirical function for predicting benthic DFe fluxes: DFe flux 1⁄4 γ tanh COX O2BW where γ (= 170μmo...

[1] Detailed depth profiles and surface transects of dissolved iron (DFe defined by 0.4-mm filtration) were investigated on three cruises in the subtropical and tropical Atlantic Ocean where dust deposition varied by 3 orders of magnitude. Surface DFe and dissolved Mn concentrations reflected dust deposition trends, but are not proportional to the estimated inputs. Using estimates of the atmosp...

Intersymbol interference (ISI) can be a major speed-limiting factor in high-speed communications links, and must be mitigated to achieve an acceptable bit-error rate (BER). One efficient method of ISI mitigation is channel equalization using a decision-feedback equalizer (DFE) [1]. One system in which DFEs have been implemented extensively to combat severe ISI is the magnetic storage read chann...

A simple modification of the decision feedback equalizer (DFE) slicer is proposed to reduce the effect of error propagation. A comparison of the performance of the modified DFE and conventional DFE is made for specific channels. On these channels, modified DFE performs only marginally better than the conventional DFE in terms of average error probability, but may offer some advantages in terms ...

In this paper, complementary code keying (CCK) transmission over frequency–selective fading channels is investigated. A vector signal model is introduced since CCK can be interpreted as a block code. Based on pairwise error probabilities we derive a performance approximation for optimum detection obtained for given channel statistics, and compare the theoretical results with simulations. Becaus...

This paper investigates the application of artificial neural network structures to the problem of nonlinear channel equalization. The difficulties caused by channel distortions such us inter symbol interference (ISI) and nonlinearities can be overcome by equalizers employing neural networks. We present a structure of a nonlinear equalizer with decision feedback using multilayer perceptron (MLP ...

Setup Introduction A. Challenges in High Speed Serial Link Design B. Signal Restoration using a Decision Feedback Equalizer (DFE) Preliminaries A. Opening Sue2 Schematics B. Running CppSim Simulations Plotting Time-Domain Results A. Output signal plots B. Output signal Eye Diagrams C. RMS Jitter Examining Non-Idealities A. Intersymbol Interference (ISI) B. Reflections C. Non-Linearity and Offse...

The distribution of fitness effects (DFE) of new mutations plays a fundamental role in evolutionary genetics. However, the extent to which the DFE differs across species has yet to be systematically investigated. Furthermore, the biological mechanisms determining the DFE in natural populations remain unclear. Here, we show that theoretical models emphasizing different biological factors at dete...

Hyoung-Nam Kim et al. 101 This paper presents a near-optimum blind decision feedback equalizer (DFE) for the receivers of Advanced Television Systems Committee (ATSC) digital television. By adopting a modified trellis decoder (MTD) with a traceback depth of 1 for the decision device in the DFE, we obtain a hardware-efficient, blind DFE approaching the performance of an optimum DFE which has no ...