BACKGROUND Delayed bathing and early initiation of breastfeeding are among the essential interventions recommended to save newborn lives. Although survey coverage reports are key to monitoring these interventions, few studies investigated whether such reports accurately reflect the proportion of mothers and children who received these interventions. In order to gather accurate data, guidance on...

We consider the use of controlled mobility in wireless networks where messages arriving randomly in time and space are collected by mobile receivers (collectors). The collectors are responsible for receiving these messages via wireless communication by dynamically adjusting their position in the network. Our goal is to utilize a combination of wireless transmission and controlled mobility to im...

A new and simplified approach for making cathodes for microbial fuel cells (MFCs) was developed by using metal mesh current collectors and inexpensive polymer/carbon diffusion layers (DLs). Rather than adding a current collector to a cathode material such as carbon cloth, we constructed the cathode around the metal mesh itself, thereby avoiding the need for the carbon cloth or other supporting ...

Garbage collectors must minimize the scarce resources of cache space and off-chip communications bandwidth to optimize performance on modern single-chip computer architectures. Strategies for achieving these goals in the context of copying garbage collection are discussed. A multi-processor mutator/collector system is analyzed. Finally, the Intel 80860XP architecture is studied.

1. Survey 2. Settling Chambers 2.1. Description of Settling Chambers 2.2. Handling of settled dust 3. Cyclone Separators 3.1. Operating Principle 3.2. Efficiency of Cyclone Separators 3.3. Applications 4. Mechanical centrifugal separators 5. Brownian Movement 6. Dry Atmospheric Deposition 6.1. Survey 6.2. Influence of Particle Dimensions 6.2.1. Coarse Particles 6.2.2. The finest Particles 6.2.3...

unglazed transpired solar collectors are widely used for heating outside air directly, these days. pre-heating ventilation air for large spaces and heating air for crop drying, are some of the applications of these kinds of collectors. the outside air is drawn straight from ambient, uniformly through the whole surface of a perforated absorber (transpired, dark-colored plate) exposed to the sun....

Solar energy is the most “available”, ecological and clean energy. This energy can be used in active or passive mode. The active mode implies the transformation of solar energy into a useful energy. The solar energy can be transformed into thermal energy, using solar collectors. In these collectors, the active and the most important element is the absorber, material which performs the absorptio...

Concurrent garbage collectors are notoriously difficult to implement correctly. Previous approaches to the issue of producing correct collectors have mainly been based on posit-and-prove verification or on the application of domain-specific templates and transformations. We show how to derive the upper reaches of a family of concurrent garbage collectors by refinement from a formal specificatio...

This paper discusses implementations of distributed garbage collectors derived using a previously developed methodology which involves mappings of distributed termination detection algorithms (DTAs) to local garbage collection schemes. Implementations produced by such mappings preserve the safety and completeness properties of the original local collectors. Through our collector implementations...