For some decades, the assembly of printed circuit boards (PCB), had been thought to be an ordinary example of mass production systems. However, technological factors and competitive pressures have currently forced PCB manufacturers to deal with a very high mix, low volume production environment. In such an environment, setup changes...
A cost reduction analysis is performed by coordinating
the exchange of LANDSAT (formerly ERTS) data between a CDC
3300 and a PDP8/L minicomputer. The LANDSAT data is displayed
on a 4002 Tektronix terminal by means of a grayscale output.
Large amounts of data and number manipulation are processed
The use of radioactive isotopes as tracers in biological systems
has become widespread since the close of World War II. Proper
use of radiotracers requires a fundamental understanding of the physical
nature of radioactivity, the characteristics of ionizing radiation,
and the various methods available for measuring radioactivity.
More importantly, the...
Most of the policy debate surrounding the actions needed to mitigate and adapt to anthropogenic climate change has been framed by observations of the past 150 years as well as climate and sea-level projections for the twenty-first century. The focus on this 250-year window, however, obscures some of the most...
This file contains data used in Figures 1, 2 and 4, as well
We evaluated whether bacteria with higher cell-specific nucleic acid content (HNA) or an active electron
transport system, i.e., positive for reduction of 5-cyano-2,3-ditolyl tetrazolium chloride (CTC), were
responsible for the bulk of bacterioplankton metabolic activity. We also examined whether the phylogenetic
diversity of HNA and CTC-positive cells differed from the...
The simultaneous diffusion of Ca 2+ and Sr 2+ ions in purified
single crystals of KC1 and NaC1 was studied over the temperature
ranges from 451°C to 669°C in KC1 and from 448°C to 683°C in NaCl.
A radioactive tracer technique was used in two types of measurements: