Shaker slip-plate adapter

Magnesium adapter ties in all of the attachment bosses on a horizontal slip table and makes a rigid coupling which terminates in a single row of attachment bosses at the edge of the horizontal plate. This eliminates ineffective dissipation of the driving force in vibration tests

Applications of adenine nucleotide measurements in oceanography

The methodology involved in nucleotide measurements is outlined, along with data to support the premise that ATP concentrations in microbial cells can be extrapolated to biomass parameters. ATP concentrations in microorganisms and nucleotide analyses are studied

How Should the Permanent School Fund be Managed?

In 1889, when South Dakota was admitted into the Union, the Federal government granted the State 3,417,922 acres of land, the proceeds from the sale of which were to be placed in what is called the Permanent School Fund. Income from the investment of this Fund and from the lease of unsold school lands is apportioned to the schools of the State for support. During the past, most of the Fund has been invested through the counties in farm mortgages, which investment, in recent years, has proven uncertain because many mortgages have been foreclosed upon. House Joint Resolution No. 10, upon which the citizens of South Dakota will vote in November 1940, proposes to allow the various counties to transfer lands upon which Fund money has been loaned to the State in lieu of the principal borrowed. This study is primarily concerned with this amendment, and, to insure an adequate background of the whole situation, an inquiry was conducted into the growth, investment policies, and extent of financial support rendered the schools of the State from Interest and Income Fund apportionments. Primary attention, however, is given to a discussion of House Joint Resolution No.10, circumstances leading to its formulation, its implications and a critical observation of these implications. The final section of this study comprises an analysis to the effects of the Resolution and some suggested changes in the administration of the Permanent School Fund and the Department of School and Public Lands. Most of the information used in this study was obtained either directly or indirectly from records in the office of the Department of School and Public Lands, from biennial reports of the Department, and from the special reports prepared by the Department for the 1939 session of the legislature. In addition, circulars prepared by proponents and opponents of the Resolution, the Constitution of the State of South Dakota, the Session Laws of the State, the 1939 Code, and reports from Departments in neighboring states were helpful sources of information

Forward velocity effects on fan noise and the influence of inlet aeroacoustic design as measured in the NASA Ames 40 x 80 foot wind tunnel

The inlet radiated noise of a turbofan engine was studied. The principal research objectives were to characterize or suppress such noise with particular regard to its tonal characteristics. The major portion of this research was conducted by using ground-based static testing without simulation of aircraft forward speed or aircraft installation-related aeroacoustic effects

Development of moored oceanographic spectroradiometer

Biospherical Instruments has successfully completed a NASA sponsored SBIR (Small Business Innovational Research Program) project to develop spectroradiometers capable of being deployed in the ocean for long periods of time. The completion of this project adds a valuable tool for the calibration of future spaceborne ocean color sensors and enables oceanographers to extend remote sensing optical techniques beyond the intermittent coverage of spaceborne sensors. Highlights of the project include two moorings totalling 8 months generating extensive sets of optical, biological, and physical data sets in the ocean off La Jolla, California, and a 70 day operational deployment of the resulting commercial product by the ONR and NASA sponsored BIOWATT program. Based on experience gained in these moorings, Biospherical Instruments has developed a new line of spectroradiometers designed to support the oceanographic remote sensing missions of NASA, the Navy, and various oceanographers

Can Yamhill County Feed Itself?

In this paper, we considered the following question: If Yamhill County in northwest Oregon were to become isolated, would the population be able to survive off the agricultural products grown within its boundaries? We looked at what the farms in Yamhill County grow and how large of a population they could support. Essentially, this looked at the feasibility of a purely local food system within the borders of Yamhill County. We hypothesized that Yamhill County would not be able to feed itself without outsourcing; stemming from this hypothesis, we examined the maximum amount of food that can be produced locally and what would need to be imported to meet basic nutritional guidelines. A study done in 2010 looked at the local food system of the Willamette Valley and compared the local agriculture with dietary needs for the population to determine if the valley could support itself. The study determined that the Willamette Valley does not meet any of the nutrient needs for a healthy diet given by the USDA for any of the food groups (Giombolini et al, 2010). Due to the scope and methods of this study, we decided to use this paper as a model for examining the local food system of Yamhill County

Nutrient constraints on plant community production and organic matter accumulation of subtropical floating marshes

In the cycle of delta growth and decay, peat-forming wetlands span a time and space continuum. Later in the delta cycle, freshwater floating marshes become increasingly removed from external sediment subsidy and internal nutrient cycling controls plant productivity and organic matter accumulation. An interesting question is whether increased external nutrient loading can affect the basic processes that lead to peat formation—plant production and organic matter decomposition. I conducted several field studies to understand whether belowground organic matter accumulation and decomposition were affected with increased nutrient exposure; in addition, the plant community was monitored over three years. A laboratory soil respiration experiment was run to determine potential limiting nutrients to microbial activity. After two years, there was a reduction of total belowground organic matter accumulation with increased nutrients; this partially resulted from reduced belowground root deposition coupled with accelerated root decomposition. This reduction in belowground accumulation, however, may be related also to the disappearance of a common plant of the community following fertilization, and not necessarily from a phenotypic shift in the allocation pattern by the dominant plant species. Fertilization accounted for an approximate doubling in aboveground biomass, accompanied by decreased stem density, and decreased species richness. Compared to other species, the grass, maidencane (Panicum hemitomon) responded most positively to increased nutrient availability at both sites, while at one site goldenrod (Solidago sempervirens) eventually captured a significant proportion of biomass. Nutrient resorption efficiency of nitrogen (N) and phosphorus (P) were both decreased with increased fertility. The degree of N- or P-limitation observed across coastal populations of P. hemitomon reflect the composite influences of site geology, water source, fire frequency, and the more conservative cycling of P compared to N. Plant community nutrient limitation may not be a reliable predictor of the type of nutrient limitation to soil microbes. Floating marshes have developed and are sustained under nutrient restricted conditions compared to other coastal marshes. Although floating marshes may function as nutrient sinks, a change in community and plant allocation pattern can be predicted with increased nutrient enrichment of these wetland types