Iron in Surface and Subsurface Waters, Grizzly Bar, Southeastern Alaska

Completion Report for Project A-019-ALAS to the Office of Water Resources Research, Department of the Interior, August 1972Atomic absorption spectrophotometric measurements for total iron were made on 69 samples of water from 8 different environments in an outwash fan built by meltwater streams from the retreating Norris Glacier on granodiorite bedrock. Norris Glacier ice contained no iron (3 samples), a subglacial stream contained 5.5 ppm Fe (1 sample), and a meltwater lake fronting Norris Glacier contained 0.7 ppm Fe (3 samples). Iron content of ground water from outwash ranged between 0.0 and 17.0 ppm (6 samples); surface streams fed by emergent ground water on the fan periphery contained 0.0 to 0.2 ppm Fe (13 samples). Taku Inlet waters contained 6.4 ppm Fe (3 samples). Subsurface water from an intertidal mud flat contained between 0.0 and 27.0, X 5.9, ppm Fe (31 samples). Surface and subsurface water from a bog and associated stream contained 1 ppm Fe (12 samples). Little exchangeable Fe was found. In situ measurements in water for Eh showed large positive values (+0.30 to +0.50 volts) and pH was slightly alkaline. The single most important source of iron was vermiculitized biotite. Iron was transported in water in the particulate state, except in outwash ground water where particulate Fe+3 was reduced to dissolved Fe+2. Iron deposits of Fe(OH)3 were found near the top of the outwash water table.The work upon which this report is based was supported in part by the funds (Proj. A·019-ALAS) provided by the United States Department of the Interior, Office of Water Resources Research, as authorized under the Water Resources Act of 1964, as amended

Leveraging the fullest potential of scientific collections through digitisation.

Access to digitised specimen data is a vital means to distribute information and in turn create knowledge. Pooling the accessibility of specimen and observation data under common standards and harnessing the power of distributed datasets places more and more information and the disposal of a globally dispersed work force, which would otherwise carry on its work in relative isolation, and with limited profile and impact. Citing a number of higher profile national and international projects, it is argued that a globally coordinated approach to the digitisation of a critical mass of scientific specimens and specimen-related data is highly desirable and required, to maximize the value of these collections to civil society and to support the advancement of our scientific knowledge globally

Computer architectures for functional and logic languages

PhD ThesisIn recent years interest in functional and logic languages has grown considerably. Both classes of language offer advantages for programming and have an influential group of people promoting them. As yet no consensus has formed as to which class is best, and such a consensus may never form. Future general-purpose computer architectures may well be required to support both classes of language efficiently. Novel architectures designed to support both classes of languages could even add impetus to the area of hybrid functional/logic languages. Treleaven et al[68] have proposed a classification of computational mechanisms which they believe underly several types of novel computer architecture (i.e. control flow, data flow and reduction). The classification partitions novel general-purpose architectures into the following classes: control driven - where a statement is executed when it is selected by flow(s) of control, data driven - where a statement is executed when some combination of its arguments are available, and demand driven - where a statement is executed when the result it produces is needed by another, already active instruction. This thesis investigates the efficient support of both functional and logic languages using an architecture that attempts to be general purpose by embodying all the mechanisms that underly the above classification. A novel packet communication architecture is presented which intergrates the control driven, data driven and demand driven computational mechanisms. A software emulator for the machine was used as the basis for separate implementations of functional and logic languages, which were in turn used to evaluate the effectiveness of the computational mechanisms described in the classification. These mechanisms allowed functional languages to be implemented wi th ease, but caused severe problems when used to support logic languages. The difficulties with these mechanisms are taken as signifying that they do not provide adequate support for logic languages. The problems encountered led to the development of a novel implementation technique for logic languages, which also proved to be a good basis for a combined functional and logic model. This model is believed to provide a sound foundation for a parallel computer system that would support functional and logic languages with equal elegance and efficiency, and would therefore also support hybrid languages. The design for such a computer is described at the end of this thesis.the Science and Engineering Research Council, Great Britain

A comparative study of some rock drill bits

The detachable single-use rick-drill bit has attracted considerable attention in the mining industry of the United States during the past few years. While this type of bit has been used for some time in other countries, it has been only recently that these bits have been manufactured in the United States. It was decided to test this type of bit and make a comparative study of a single-use bit and a widely used detachable rock-drill bit --Introduction, page 1

The Lipid Composition of Milk as Affected by High Grain-Limited Roughage Rations Containing Whey Products

Certain rations fed to lactating dairy cows appear to have a dramatic influence on the lipid composition of milk fat produced. A high grain ration fed with a limited amount of roughage tends to cause a depression in milk fat production while at the same time changing the milk fat composition. There have been various attempts to alleviate the depression in milk fat. Minerals used in the ration seem to slightly relieve the milk fat depression caused by high grain rations. One drawback has been lower milk production due to a decline in concentrate consumption. Whey products added to a high concentrate ration produced more acceptable results. The milk fat production was returned nearly to normal without altering total milk production. Previous research has been involved with the gross composition of milk and the fatty ac id composition of the milk fat. Changes have been shown in the fatty acid composition of milk fat when cows were fed high concentrate rations. These changes may be responsible for flavor problems, such as a decreased oxidative stability of the milk. In light of this, the lipid composition of milk is of economic importance to the dairy industry. The purpose of this research was to determine changes that occur in the lipid composition of milk obtained from cows on high grain limited roughage rations containing whey products. The specific objectives of the study were: 1. To compare the phospholipid content of the milk fat in the standardization period to that during the experimental period. 2. To determine the total fatty acid composition of the milk fat in the standardization and experimental periods. 3. To determine the fatty acid composition of the polar lipid fraction. 4. To measure gross changes in the polar lipid components

Assessing Consistency and Fairness in Sentencing: A Comparative Study in Three States

Summarizes a study of sentencing guidelines in Michigan, Minnesota, and Virginia comparing levels of predictability and judicial discretion under different guideline systems, effectiveness in limiting discriminatory disparities, and lessons learned