Elsewhere in Science, 6 November 2015

International Conference on Cloud Computing and Big Data, CCBD 2015, Shanghai, China, November 4-6, 2015

Lecture 22 — November 19 , 2015

In terms of exact numbers, hard drives support somewhere around 140MB/sec of sequential reads/writes, but only 120I/O’s/sec when doing reads/writes on random 4KB chunks. This is because the disk must physically spin to the read/write location. RAM supports somewhere around 5-10GB/sec of reads/writes, with much less penalty for random access. SSDs/Flash is somewhere in the middle, but with the i...

AIDSFree Prevention Update: November 2015

In Focus Pre-exposure Prophylaxis to Prevent the Acquisition of HIV-1 Infection (PROUD): Effectiveness Results from the Pilot Phase of a Pragmatic Open-label Randomised Trial New PEPFAR HIV Prevention and Treatment Targets Barriers to the Uptake of Postexposure Prophylaxis Among Nairobi-based Female Sex Workers Behavioral Prevention Effects of Peer Education Intervention on HIV/AIDS Related Sex...

Lecture 21 — November 12 , 2015

Previously, we looked at basis pursuit and iterative hard thresholding (IHT) for `2/`1 sparse signal recovery. Recall that from before the `2/`1 guarantee: time per iteration depends on matrix-vector multiplication time by Π,ΠT in the IHT algorithm. To make this fact, the only way we know is to use a fast such Π, such as sampling rows from the Fourier matrix. However, for those Π we do not know...

Comments on Statistical Issues in November 2015

purpose of this section is to show how many observations are actually analyzed in multivariate analyses, such as multiple linear regression analysis or multiple logistic regression analysis, when there are different numbers of missing values in each explanatory variable. Let’s perform a multiple linear regression using the following hypothetical data (Table 1). In this data, explanatory variabl...