On some diminutive types of Tasmanian stone implements

It is the object of this paper to attempt to give a detailed description of some of the smaller forms of stone implements made by the extinct Tasmanians, which, on account of their comparative scarcity and diminutive size, have hitherto not figured prominently in discussions relative to Tasmanian Stone Culture, of which they constitute a very important feature. Many of these tiny examples of Aboriginal stone-craft exhibit a high degree of skill in their manufacture, with their delicately chipped edges and cleverly fabricated points, and as an undoubted analogy exists between them and some Mainland forms, they deserve full consideration from students of Ethnology and Archreology, especially in their relation to Tasmania. For purposes of description here, these miniature implements may be divided into three main types, which will be called, respectively, Planes, Gravers & Borers, and Scrapers, all of which have their distinct prototypes.In the ordinary more or less well-defined forms which occur in and around all the chief native camping grounds on the East Coast and Midlands

Extreme reversed sexual dichromatism in a bird without sex role reversal

Brilliant plumage is typical of male birds, reflecting differential enhancement of male traits when females are the limiting sex. Brighter females are thought to evolve exclusively in response to sex role reversal. The striking reversed plumage dichromatism of Eclectus roratus parrots does not fit this pattern. We quantify plumage color in this species and show that very different selection pressures are acting on males and females. Male plumage reflects a compromise between the conflicting requirements for camouflage from predators while foraging and conspicuousness during display. Females are liberated from the need for camouflage but compete for rare nest hollows

Notes on a series of "pounders" from certain localities of the west coast of Tasmania

All students and collectors of Tasmanian stone implements are more or less familiar with the type generally known as "Pounder" or hammer-stone, which occurs on most of the ancient native camping grounds along the East Coast, the estuary of the river Derwent, and in the wind-blown sand pits of the Midlands. This type is fairly well represented in the collection at the Tasmanian Museum. For example, the Ovate or true hammer-stone were chosen from the beaches and beds of streams for their handy shape and suitability for the delivery of hard fracturing blows, evidence of such usage being plainly marked at their extremities. There is also another type, typical of the East Coast camps in particular. This is distinguished by its somewhat elongated shape, best likened to that of a small Banana, or perhaps better, to the white Passion-fruit of temperate climes. This last-mentioned type was probably used for breaking open the shells of the Green Whelk (Turbo undulatus) which figured so largely as an article of food with the natives whilst they were roaming the coast-line

Automated Operation of Multiple Payloads on Agile MicroSat (AMS)

The Agile MicroSat (AMS) is a 6U CubeSat designed to operate in very low-Earth orbit (VLEO), an orbit which enables a higher ground resolution given a particular optical sensing aperture. AMS was developed by MIT Lincoln Laboratory in collaboration with Blue Canyon Technologies LLC and Enpulsion GmbH. AMS is hosting three disparate payloads: an indium field effect electric propulsion (FEEP) thruster to change and maintain orbit; a laser demonstration payload called Beacon for adaptive optics experimentation; and a camera payload for visible-spectrum imaging. In order to fully exercise the capability of each payload, the AMS operations team has developed an automated end-to-end processing pipeline which handles experiment scheduling subject to constraints, upload of commands and satellite state estimates to our mission partner BCT, and download and ingest of telemetry for operations planning and the creation of data products. An example product includes a change detection algorithm and image publication workflow, using camera images to detect disaster damage. These payload operation tools have enabled daily interleaved payload operations with minimal manual overhead since the AMS launch on SpaceX\u27s Transporter 5 mission on May 25th, 2022. This paper will describe the architecture of our processing pipeline, mission outcomes, and lessons learned

Tasmanian stone culture. Some notes on distinctive types, spokeshaves, borers, and chipping tools, and their probable usages

Amongst the various and more or less well-defined types of Tasmanian stone implements which have been engaging the attention of students for some time past, there are two distinct and decidedly specialised forms which stand out conspicuously from all the others as having been fabricated for certain definite purposes. In the following notes they will be termed respectively Spokeshaves and Borees, and it is proposed with the help of two or three plates to give a short description of several series which are fairly representative of the types

Fabrication and characterization of porous metal emitters for electrospray applications

Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 2008.Includes bibliographical references (leaves 137-140).Electrospray thrusters provide small, precise thrust with high power efficiencies and variable specific impulses from less than 1000s to over 4000s. The miniaturization and clustering of many emitters together is essential to increase the thrust density of electrospray devices in order to increase their domain of applicability in space. Electrospray emitter arrays have many advantages over existing electric propulsion devices including much lower mass per unit thrust and much lower volume per unit thrust than conventional ion and hall devices. Additionally, with emitter clustering, the thrust density can meet and even exceed that of hall or ion thrusters. A method of micro-fabricating electrospray emitter arrays using modified conventional microfabrication technology is presented. The method is adaptable to different emitter materials and can be used to create ultra dense emitter arrays with microfabrication precision down to the micron level. One-dimensional linear emitter arrays with emitter separation as low as 500 [mu]m have been fabricated out of porous tungsten and preliminary tests show that dense two-dimensional emitter arrays can be fabricated with emitter separations down to 300[mu]m. Experimental research that was conducted to characterize emitter array performance is also presented. Time of flight mass spectrometry was used to identify the emitted ion species from the device, which showed that the device operates in the ion emission regime. Current was collected as a function of applied voltage to show that the devices were able to operate with emitted current levels of 0.5 - 1.5 [mu]A per emitter, even for dense arrays. Direct thrust measurements were performed to show that the amount of thrust attainable is on the order of 0.1 [mu]N per [mu]A of emitted current for extraction voltages of around 1900 V.(cont.) A normalization scheme was implemented to compare performance of emitter arrays of different density and initial results from a numerical model has shown that the emitters might be limited by fluid transport.by Robert S. Legge Jr.S.M

Urban water access and use in the Kivus: evaluating behavioural outcomes following an integrated WASH intervention in Goma and Bukavu, Democratic Republic of Congo

Increasing the availability and reliability of community water sources is a primary pathway through which many water supply interventions aim to achieve health gains in communities with limited access to water. While previous studies in rural settings have shown that greater access to water is associated both with increased overall consumption of water and use of water for hygiene related activities, there is limited evidence from urban environments. Using data collected from 1253 households during the evaluation of a community water supply governance and hygiene promotion intervention in the cities of Goma and Bukavu, Democratic Republic of Congo, we conducted a secondary analysis to determine the impact of these interventions on household water collection and use habits. Using multiple and logistic regression models we compared differences in outcomes of interest between households in quartiers with and without the intervention. Outcomes of interest included litres per capita day (lpcd) of water brought to the household, lpcd used at the household, and lpcd used for hygiene-related activities. Results demonstrated that intervention households were more likely to use community tapstands than households located in comparison quartiers and collected on average 16.3 lpcd of water, compared with 13.5 lpcd among comparison households (adj. coef: 3.2, 95 CI: 0.84 to 5.53, p = 0.008). However, reported usage of water in the household for domestic purposes was lower among intervention households (8.2 lpcd) when compared with comparison households (9.4 lpcd) (adj. coef: −1.11, 95 CI: −2.29 to 0.07), p = 0.066) and there was no difference between study groups in the amount of water allocated to hygiene activities. These results show that in this setting, implementation of a water supply governance and hygiene promotion intervention was associated with a modest increase in the amount of water being bought to the household, but that this did not translate into an increase in either overall per capita consumption of water or the per capita amount of water being allocated to hygiene related activities

Neural networks for dimensionality reduction of fluorescence spectra and prediction of drinking water disinfection by-products

The final publication is available at Elsevier via http://dx.doi.org/10.1016/j.watres.2018.02.052 © 2018. This manuscript version is made available under the CC-BY-NC-ND 4.0 license https://creativecommons.org/licenses/by-nc-nd/4.0/The use of fluorescence data coupled with neural networks for improved predictability of drinking water disinfection by-products (DBPs) was investigated. Novel application of autoencoders to process high-dimensional fluorescence data was related to common dimensionality reduction techniques of parallel factors analysis (PARAFAC) and principal component analysis (PCA). The proposed method was assessed based on component interpretability as well as for prediction of organic matter reactivity to formation of DBPs. Optimal prediction accuracies on a validation dataset were observed with an autoencoder-neural network approach or by utilizing the full spectrum without pre-processing. Latent representation by an autoencoder appeared to mitigate overfitting when compared to other methods. Although DBP prediction error was minimized by other pre-processing techniques, PARAFAC yielded interpretable components which resemble fluorescence expected from individual organic fluorophores. Through analysis of the network weights, fluorescence regions associated with DBP formation can be identified, representing a potential method to distinguish reactivity between fluorophore groupings. However, distinct results due to the applied dimensionality reduction approaches were observed, dictating a need for considering the role of data pre-processing in the interpretability of the results. In comparison to common organic measures currently used for DBP formation prediction, fluorescence was shown to improve prediction accuracies, with improvements to DBP prediction best realized when appropriate pre-processing and regression techniques were applied. The results of this study show promise for the potential application of neural networks to best utilize fluorescence EEM data for prediction of organic matter reactivity.Canadian Water NetworkNatural Sciences and Engineering Research Council of Canada (NSERC) Chair in Drinking Water Research at the University of Toront

TID Tolerance of Popular CubeSat Components

In this paper we report total dose test results of COTS components commonly used on CubeSats. We investigate a variety of analog integrated circuits, a popular microcontroller (PIC24) as well as SD memory card

Reference to the index of the miscellaneous Launceston land deeds (1823-1854, of Shields, Heritage, Stackhouse & Martin, solicitors of Launceston.

Miscellaneous documents from the office of Shields, Heritage, Stackhouse & Martin, solicitors of Launceston, mainly deeds of earlier solicitors Gleadow & Henty, etc., relating to land in the Launceston district, including property of Philip Oakden, Adam Beveridge, J. & W. Manifold and Robert Legge, etc., and claimed by R. Dry