Economic and social factors in designing disease control strategies for epidemics on networks

Models for control of epidemics on local, global and small-world networks are considered, with only partial information accessible about the status of individuals and their connections. The main goal of an effective control measure is to stop the epidemic at a lowest possible cost, including treatment and cost necessary to track the disease spread. We show that delay in detection of infectious individuals and presence of long-range links are the most important factors determining the cost. However, the details of long-range links are usually the least-known element of the social interactions due to their occasional character and potentially short life-span. We show that under some conditions on the probability of disease spread, it is advisable to attempt to track those links. Thus, collecting some additional knowledge about the network structure might be beneficial to ensure a successful and cost-effective control.Comment: To be published in Acta Phys. Pol.

Study of in-situ degradation of thermal control surfaces

Experimental technique used in study of damage mechanism to semiconductor pigments exposed to ultraviolet radiation can be adapted for investigations of surface chemistry and may be used analytically to determine contamination

Investigation of environmental effects on coatings for thermal control

Accomplishments made during study of coatings are reported. Development of structure/property theory for selecting most appropriate pigments for space vehicle paints is discussed along with improvements made in zinc-oxide pigmented potassium silicate paint

Development of space-stable thermal-control coatings Triannual report, 1 Jan. - 30 Apr. 1970

Development and performance of solar wind simulation facility for studying thermal-control coating

Stable White Coatings

In a previous research program for the Jet Propulsion- Laboratory, extensive studies led to the development and specifications of three zinc oxide-pigmented thermal-control coatings. The principal objectives of this program are: improvement of the three paints (as engineering materials), determination of the validity of our accelerated space-simulation testing, and continuation of the zinc oxide photolysis studies begun in the preceding program. Specific tasks that are discussed include: improvement of potassium silicate coatings as engineering materials and elucidation of their storage and handling problems; improvement of methyl silicone coatings as engineering materials; studies of zinc oxide photolysis to establish reasons for the observed stability of zinc oxide; and determination of space-simulation parameters such as long-term stability (to 8000 ESH), effect of coating surface temperature on the rate of degradation, and validity of accelerated testing (by reciprocity and wavelength dependency studies)

Development of space-stable thermal-control coatings /paints with low solar absorptance/ emittance ratios/ triannual report, 20 jun. - 20 oct. 1964

Development of space stable thermal control coating

Faith-based practice

YesFaith-based social work is characterized by the recognition and acknowledgement of faith and faith-based values as significant sources of motivation and guidance. These may enhance professional values, but may also draw practitioners into direct conflict with secular values within the mainstream. This chapter explores the religious or faith-based origins of social work, the nature of faith-based practice, contemporary faith-based issues, and the global spread of social policies aimed at increasing the involvement of faith-based organizations in service delivery. It also seeks to highlight some of the dilemmas involved