The southern regional conference on technology assessment: Summary

The proceedings of a conference on technology assessment are presented. A survey of recent Federal activity in technology assessment was discussed initially. Emphasis was placed on state and local activities with respect to technology assessment to include the following subjects: (1) the technology assessment desired by states, (2) organization of technology assessment activities, (3) how to perform technology assessments for less than $5,000, and (4) the preparation of environmental impact statements. Specific application of technology assessment to solid waste management in Connecticut is reported

Positron annihilation spectroscopy with magnetically analyzed beams

Lifetime measurements with magnetically analyzed positron beams were made in condensed media with uniform and non-uniform properties. As expected, the lifetime values with magnetically analyzed positron beams in uniform targets are similar to those obtained with conventional positron sources. The lifetime values with magnetically analyzed beams in targets which have non-uniform properties vary with positron energy and are different from the conventional positron source derived lifetime values in these targets

Moisture determination in composite materials using positron lifetime techniques

A technique was developed which has the potential of providing information on the moisture content as well as its depth in the specimen. This technique was based on the dependence of positron lifetime on the moisture content of the composite specimen. The positron lifetime technique of moisture determination and the results of the initial studies are described

Evaluating remote site incubators to support restoration of Arctic Grayling in Michigan

Remote site incubators (RSIs) have been used to rear salmonid fish eggs along streams in the Pacific Northwest since the 1980s. Recently, the successful use of RSIs for Arctic Grayling Thymallus arcticus restoration in Montana has sparked a renewed interest to reestablish the species in Michigan. To support future reintroduction efforts of Arctic Grayling in Michigan, I evaluated RSIs in three Michigan streams during 2018 and 2019 using Rainbow Trout Oncorhynchus mykiss eggs (as surrogates for Arctic Grayling). My objectives were to: (1) compare hatching success between two different RSI designs (19-L vs. 265-L RSIs), and (2) test whether the removal of dead eggs (“picking”) from 19-L RSIs affected hatching success. Overall survival (i.e., hatching success of all RSIs) in 2018 and 2019 was 41.3% and 52.4%, respectively. Survival between unpicked 19-L and 265-L RSIs by stream differed from 1.5% to 14.3% (mean = 5.8%) in 2018 and 0.2% to 0.4% (mean = 0.3%) in 2019. On average, the picked 19-L RSIs had greater survival—although not always statistically significant—than unpicked 19- L RSIs during both years (2018: mean = 1.6%, P = 0.27; 2019: mean = 10.4%, P = 0.02). I documented a positive correlation between survival and RSI flow rates, and a decline in survival when RSI flow rates could not be maintained above ~0.4 L/min. My results show that both 19-L and 265-L RSIs can be used successfully in Michigan streams. Moreover, my results suggest that removing dead eggs was most likely to improve survival when RSI flow rates cannot be maintained above 0.4 L/min

Discussant\u27s response to Self-evaluative privilege

https://egrove.olemiss.edu/dl_proceedings/1087/thumbnail.jp

Panel 8: Accounting Information Systems

This panel will discuss a number of issues related to the field or domain of accounting information systems (AIS). The general question to be debated is: Is there a valid, well-founded, cogent field of research and practice that we are willing to label AIS? If so, what are the scope and boundaries of AIS research? What are the peculiar characteristics of AIS and how do they differ from information systems (or MIS) as a field of inquiry? The panel will be conducted as an informally structured debate with Professors Mason and McFarlan taking the more general information systems perspective and Professors Mock and Wilkinson delineating the AIS point of view. The journal editors will also have the opportunity to discuss editorial issues and interests related to potential AlS research and publication

Some comments on reconstructing the historical climate of California, USA

This paper describes some examples of historical climate reconstruction pertaining to California, USA, focusing mostly on winter climate given the expected strongest teleconnection signals for this season. Climatic data consist of early instrumental data from the US Army Surgeon General at military forts, observers of the Smithsonian Institution, the Signal Service, and some private observers. Documentary (non-instrumental) data were also used in assessing extreme events. Original daily records of these data were carefully assessed for discontinuities from examining diurnal temperature ranges and daily precipitation amounts. The climatic reconstructions conducted were as follows: 1) winter precipitation time series for selected locations since 1850, particularly for Sacramento and San Francisco, 2) winter temperature time series for selected locations since 1850, and 3) analyses of an extreme flooding event in January 1862 and a landfalling tropical cyclone of September 1939. Results indicate distinctive wetter winters for central and northern California in the late nineteenth century, and some of these wetter years correspond to well-known very strong El Ni˜no events. Connections to weaker El Ni˜no and La Ni˜na events, however, are not clearly evident. The flood of January 1862 is considered unprecedented when compared to other floods of the last 130 years. The reconstruction of a landfalling tropical cyclone for September 1939 near Los Angeles suggests its intensity at just below hurricane strength

Positron lifetime studies in thermoplastic polyimide test specimens

Positron lifetime measurements were made in two thermoplastic polyimide materials recently developed at Langley. The long component lifetime values in polyimidesulfone samples are 847 + or - 81 Ps (dry) and 764 + or - 91 Ps (saturated). The corresponding values in LARC thermoplastic imides are 1080 + or - 139 Ps (dry) and 711 + or - 96 Ps (saturated). Clearly, the presence of moisture has greater effect on positron lifetime in LARC thermoplastic imides than in the case of polyimidesulfones. This result is consistent with the photomicrographic observations made on frozen water saturated specimens of these materials