Mandating Environmental Liability Insurance

Plant cuticles are extracellular membranes covering aerial organs of plants, whose main functions rely on the protection against water loss, mechanical injury from the environment, attack of microorganism, and also regulation of gas exchange. Among the several constituents of plant cuticles, waxes are those that play an important role in their barrier properties. In order to enhance the mechanical properties of wax, NFC was applied in. In the project, mainly two kinds of methods were used to prepare wax-NFC composites. One way was wax and NFC were dissolved in toluene and casted to be a film, another way was to prepare NFC aerogel firstly, and then, impregnated the aerogel into wax liquid. After pressing it the structure was more compact. In order to characterize the properties of samples, SEM, XRD, TGA, DSC, Contact angle testing, tensile test and oxygen permeability methods were applied in

Can Active Labour Market Policy Work? Some Theoretical Considerations

Persistent high unemployment in Europe has led to renewed interest in Active Labour Market Policy. However, most existing theory suggests that its effects are ambiguous at best. We argue that job search assistance and wage subsidies are more appropriately modelled as a transition rather than the state-based approach of existing theory. This eliminates the ambiguity. We present two main models, one in which negative duration dependence in unemployment arises from state dependence, the other where it is due to heterogeneity. In both cases policy is unambiguously effective provided it is targeted on those who are, or are most likely to become, long-term unemployed. Some crude estimates suggest that Active Labour Market Policies could have a significant, though not spectacular, effect in reducing unemployment.

Ocular screening tests of elementary school children

This report presents an analysis of 507 abnormal retinal reflex images taken of Huntsville kindergarten and first grade students. The retinal reflex images were obtained by using an MSFC-developed Generated Retinal Reflex Image System (GRRIS) photorefractor. The system uses a 35 mm camera with a telephoto lens with an electronic flash attachment. Slide images of the eyes were examined for abnormalities. Of a total of 1835 students screened for ocular abnormalities, 507 were found to have abnormal retinal reflexes. The types of ocular abnormalities detected were hyperopia, myopia, astigmatism, esotropia, exotropia, strabismus, and lens obstuctions. The report shows that the use of the photorefractor screening system is an effective low-cost means of screening school children for abnormalities

Trade Adjustment Assistance under the U.S. Trade Act of 1974: An Analytical Examination and Worker Survey

The goals of trade adjustment assistance (TAA) are to ease transition, compensate injury, and bleed political pressure for protectionism. Section I of the paper outlines the economic principles underlying these goals, and their shifting historical importance in the U.S. Sections II and III of the paper discuss the personal characteristics of a representative sample of worker recipients of TAA in 1976, and their labor market success in several subsequent years. Their experience is compared to that of a matched sample of workers receiving standard unemployment insurance (UI) . Comparisons in Section II focus on differences in mean characteristics and experience between the TAA and UT samples, controlling only for whether workers returned eventually to the firm from which they were initially separated. Comparisons in Section III focus on differences between the TAA and UI samples in their ability to recover lost employment and income, using a regression approach that in principle controls for all relevant variables, and not for just one. The most important conclusions of the research are the following. (1) The majority of TAA recipients in 1976 were not permanently displaced, but returned eventually to their former employers. A far greater proportion of UI recipients suffered permanent displacement. (2) Workers receiving TAA had higher incomes on average than their counterparts who received only UI. Their incomes furthermore fell less frequently below the poverty line. (3) TAA recipients nevertheless experienced more frequent and enduring transitional unemployment than did UI recipients, and did not return to their former income level as rapidly. (4) The reasons for conclusion (3) were unclear. It could not readily be explained by differences between the TAA and UI samples in permanence of layoff, generosity of program benefits, age, experience, industry, affluence, economic environment, socioeconomic status, or behavioral responses to any of these variables. Conclusions (1) and (2) are at variance with most previous work on TAA. Conclusion (3) is not, but the traditional explanations for it are those that conclusion (4) rules out.

Test and evaluation of the 2.4-micron photorefractor ocular screening system

An improved 2.4-m photorefractor ocular screening system was tested and evaluated. The photorefractor system works on the principal of obtaining a colored photograph of both human eyes; and, by analysis of the retinal reflex images, certain ocular defects can be detected such a refractive error, strabismus, and lens obstructions. The 2.4-m photorefractory system uses a 35-mm camera with a telephoto lens and an electronic flash attachment. Retinal reflex images obtained from the new 2.4-m system are significantly improved over earlier systems in image quality. Other features were also improved, notably portability and reduction in mass. A total of 706 school age children were photorefracted, 211 learning disabled and 495 middle school students. The total students having abnormal retinal reflexes were 156 or 22 percent, and 133 or 85 percent of the abnormal had refractive error indicated. Ophthalmological examination was performed on 60 of these students and refractive error was verified in 57 or 95 percent of those examined. The new 2.4-m system has a NASA patent pending and is authorized by the FDA. It provides a reliable means of rapidly screening the eyes of children and young adults for vision problems. It is especially useful for infants and other non-communicative children who cannot be screened by the more conventional methods such as the familiar E chart

Characterizing the uncertainty in holddown post load measurements

In order to understand unexpectedly erratic load measurements in the launch-pad supports for the space shuttle, the sensitivities of the load cells in the supports were analyzed using simple probabilistic techniques. NASA engineers use the loads in the shuttle's supports to calculate critical stresses in the shuttle vehicle just before lift-off. The support loads are measured with 'load cells' which are actually structural components of the mobile launch platform which have been instrumented with strain gauges. Although these load cells adequately measure vertical loads, the horizontal load measurements have been erratic. The load measurements were simulated in this study using Monte Carlo simulation procedures. The simulation studies showed that the support loads are sensitive to small deviations in strain and calibration. In their current configuration, the load cells will not measure loads with sufficient accuracy to reliably calculate stresses in the shuttle vehicle. A simplified model of the holddown post (HDP) load measurement system was used to study the effect on load measurement accuracy for several factors, including load point deviations, gauge heights, and HDP geometry

Hierarchical models of very large problems, dilemmas, prospects, and an agenda for the future

Interdisciplinary approaches to the modeling of global problems are discussed in terms of multilevel cooperation. A multilevel regionalized model of the Lake Erie Basin is analyzed along with a multilevel regionalized world modeling project. Other topics discussed include: a stratified model of interacting region in a world system, and the application of the model to the world food crisis in south Asia. Recommended research for future development of integrated models is included

Testing based on the RELAY model of error detection

RELAY, a model for error detection, defines revealing conditions that guarantee that a fault originates an error during execution and that the error transfers through computations and data flow until it is revealed. This model of error detection provides a fault-based criterion for test data selection. The model is applied by choosing a fault classification, instantiating the conditions for the classes of faults, and applying them to the program being tested. Such an application guarantees the detection of errors caused by any fault of the chosen classes. As a formal mode of error detection, RELAY provides the basis for an automated testing tool. This paper presents the concepts behind RELAY, describes why it is better than other fault-based testing criteria, and discusses how RELAY could be used as the foundation for a testing system