1,133 research outputs found
Performance of a micro-engineered ultrasonic particle manipulator
No full textAn ultrasonic microfluidic particle manipulator has been modeled and its experimentally measured separation performance has been compared with the modeled results for 1 µm latex particles, and yeast particles in water
Religious and philosophical psychology in the works of N.M. Bogolyubov
No full textWe present the results of historical and psychological research filling the gaps of contemporary knowledge about personalities of religious and philosophical direction of Russian psychology in late XIX – early XX centuries. The author introduces the biography of events and the views of Russian psychologist N.M. Bogolyubov – a man of uneasy fate, embodied in his work the idea of spiritual practice in the analysis and description of a person's inner world. Psychological works of N.M. Bogolyubov reflect the views common for Russian spiritual direction in psychology: consideration of man's inner world by revealing how mental experience is given to the person, his self, recognition of the soul as a sphere of inner reality, recognition of the mental world of a person as an independent entity, living by its own laws, which do not depend on the laws of the material world, asserting that faith can be a valid knowledge. In the arsenal of creative achievements of N.M. Bogolyubov are determination of the value of psychology in studying the problem of religious consciousness and professionalism as a necessary quality of a researcher psychologist in the field
An improved thick-film piezoelectric material by powder blending and enhanced processing parameters
No full textThis paper details improvements of the d33 coefficient for thick-film lead zirconate titanate (PZT) layers. In particular, the effect of blending ball and attritor milled powders has been investigated. Mathematical modeling of the film structure has produced initial experimental values for powder combination percentages. A range of paste formulations between 8:1 and 2:1 ball to attritor milled PZT powders by weight have been mixed into a screen-printable paste. Each paste contains 10% by weight of lead borosilicate glass and an appropriate quantity of solvent to formulate a screen printable thixotropic paste. A d33 of 63.5 pC/N was obtained with a combination of 4:1 ball milled to attritor milled powder by weight. The improved paste combines the high d33 values of ball and the consistency of attritor milled powder. The measured d33 coefficient was further improved to 131 pC/N by increasing the furnace firing pro-file to 100
The biology of Australian weeds 58. Baccharis halimifolia L.
No full textThe genus name Baccharis is after the Greek bakkaris, an oil producing plant (later called 'Celtic valerian') (Parsons and Cuthbertson 1992). The species name halimifolia is derived from the Greek alimos meaning 'seas' and the Latin folium meaning 'leaf' (Parsons and Cuthbertson 1992). Baccharis halimifolia L. belongs to the family Asteraceae which is the largest family of flowering plants, comprised of over 1100 genera and 19 000 species (Zomlefer 1994). Baccharis is a large genus, comprised of over 400 species (Mahler and Waterfall 1964, Zomlefer 1994) distributed over seven geographical areas: Brazil, Andes Mountains, Andes-Patagonia, Guyanarum, south-eastern Brazil, Mexico (including western United States) and the Antilles (including the eastern United States) (Boldt 1989). In Australia, B. halimifolia is most commonly known as groundsel bush. 'Groundsel' refers to the groundsel-like flowering heads, as in plants in the Senecio genus (Parsons and Cuthbertson 1992). In its native region it is often referred to as saltbush (Stevenson 1969, Proffitt et al. 2005), groundsel tree (Altfeld and Stiling 2006), sea myrtle (Caccamise 1977, Dickens and Boldt 1985) and eastern baccharis (Adlerz 1980)
The age, geological character and structural setting of quartz-pyrite veins in the Assynt Terrane, Lewisian Complex, NW Scotland.
No full textA set of previously unrecognised quartz-pyrite veins are present in the Assynt Terrane of the mainland Lewisian Complex, NW Scotland. The veins cross-cut the Badcallian and Inverian fabrics, and the Scourie Dykes. The veins have been reworked by Laxfordian deformation fabrics (ca. 1.8 Ga) and later brittle faults of various ages. Fieldwork analyses suggest that the veins are a multi-modal system of tensile/hybrid fractures which are locally influenced by the existing foliation of the gneisses. They are inferred to have formed during regional NW-SE extension, an orientation that is almost orthogonal to the NE-SW extension direction associated with the intrusion of the Scourie Dykes. Microstructures within the quartz veins suggest that overprinting Laxfordian events reached maximum temperatures of 500°C under moderate strain rates, while pervasive ductile deformation was restricted mainly to the Canisp Shear Zone and was succeeded by brittle deformation as the temperature decreased but strain rates remained high within the shear zone. Re-Os dating of the pyrite within the quartz veins gives an age of 2259±61 Ma, placing the emplacement of the veins after the oldest dates for the Scourie Dykes (2420, 2400 & 2375 Ma) but before the youngest ages (1990 Ma). Sulphur isotope analysis suggests that the pyrite is of primitive mantle origin and may have been either stripped from the crust by fluid circulation or was associated with the intrusion of the Scourie dykes. The presence of the quartz-pyrite veins in both the Assynt and Gruinard Terranes suggest they were amalgamated during or prior to Inverian deformation while the absence of the veins in the Rhiconich Terrane is consistent with the suggestion that this terrane was not amalgamated until the Laxfordian Orogeny. The emplacement of the veins may linked to the formation and/or amalgamation of the Loch Maree Group supracrustal sequence
Spectral characterisation of shortened pulse position modulation format
No full textShortened pulse position modulation (SPPM) is a new modulation format that has recently been proposed for underwater wireless optical communications. A full spectral characterisation of SPPM is considered and original expressions are presented, which are validated numerically for predicting both the continuous and discrete spectrum
N.M. JADRINTSEV AND ALTAY: RESEARCH ACTIVITIES OF THE PUBLICIST AND HIS ROLE IN THE DEVELOPMENT OF ALTAI PERIODICALS
No full textPurpose. The purpose of this article is to study the role of Nikolai Mikhailovich Yadrintseva in the course of development of the Altai periodicals and its research and statistical activities in the Altai.
Methodology. When writing the article were used General scientific methods like analysis, comparison, generalization.
Results. As a result, the author analyzed the research, ethnographic and statistical activities of Nikolai Mikhailovich Yadrintsev in the Altai. Visiting with the research mission Altai, N.M. Yadrintsev published grandiose essays and articles not only about the ethnographic side of the Altaian “aliens”, but also was able to give his inhabitants a map of the locality and a detailed description of meteorological observations. The role of N.M. Yadrintsev in the development of the Altai periodicals and gives a general description of the newspaper “Eastern Review” under his leadership. Despite the fact that publications on behalf of N.M. Yadrintsev in the Altai were not preserved, with the exception of a small quatrain, he managed to raise the provincial periodicals to a completely new level. Together with Siberian correspondents, he was able to inspire a whole generation, as a result of which universities, museums and numerous Siberian publishing houses began to develop in the cities of Siberia. With the arrival of Nikolai Mikhailovich in the Altai, the periodical press noticeably developed and strengthened.
Practical implications. The article can be used in the teaching of local history, the history of Russia and Russian journalism
Estimating the duration and cost of weed eradication programmes
No full textTwo prerequisites for realistically embarking upon an eradication programme are that cost-benefit analysis favours this strategy over other management options and that sufficient resources are available to carry the programme through to completion. These are not independent criteria, but it is our view that too little attention has been paid to estimating the investment required to complete weed eradication programmes. We deal with this problem by using a two-pronged approach: 1) developing a stochastic dynamic model that provides an estimation of programme duration; and 2) estimating the inputs required to delimit a weed incursion and to prevent weed reproduction over a sufficiently long period to allow extirpation of all infestations. The model is built upon relationships that capture the time-related detection of new infested areas, rates of progression of infestations from the active to the monitoring stage, rates of reversion of infestations from the monitoring to active stage, and the frequency distribution of time since last detection for all infestations. This approach is applied to the branched broomrape ('Orobanche ramosa') eradication programme currently underway in South Australia. This programme commenced in 1999 and currently 7450 ha are known to be infested with the weed. To date none of the infestations have been eradicated. Given recent (2008) levels of investment and current eradication methods, model predictions are that it would take, on average, an additional 73 years to eradicate this weed at an average additional cost (NPV) of AU91.3m and $AU72.3m, respectively. The reduction in estimated programme length and cost may represent progress towards the eradication objective, although eradication of this species still remains a long term prospect
Patchy herbivore and pathogen damage throughout the introduced Australian range of groundsel bush, Baccharis halimifolia, is influenced by rainfall, elevation, temperature, plant density and size
No full textThe intensity and type of damage exerted by a biological control agent on an invasive plant is often influenced by plant architecture or size, density, distribution and phenology as well as microhabitat. Here, herbivore and pathogen damage thought to be caused by seven biological control agents introduced up to 40 years ago for control of groundsel bush (Baccharis halimifolia) is examined. Sampling was conducted throughout the known introduced range of groundsel bush in Australia to determine how damage type and intensity were influenced by rainfall, temperature, elevation, population density, average plant size and variability in plant size. Sori abundance score (characteristic of the introduced rust fungus) was higher on large plants at high rainfall. Leaf skeletonization was negatively correlated with elevation and leaf miner damage was lower in high density plant populations. Leaf hole damage increased with rainfall particularly on large plants in homogeneous sized populations. Stem-borer damage increased with plant size, but this relationship was influenced by rainfall and plant population density. There was less stem-boring in large populations but the strength of the relationship was influenced by temperature and variation in plant size. Overall considerable variation in intensity of herbivore and pathogen damage was found throughout the range of groundsel bush. If herbivore and pathogen damage impact on plant vital rates and demography it would be expected that biological control success for this species would be patchy and depend on plant size, population density and site location
Spectral characterisation of nk pulse position modulation format
No full textnk pulse position modulation (PPM) is a new modulation format that has recently been proposed for the optical wireless channel. This Letter considers, for the first time, a full spectral characterisation of -PPM and presents original expressions, which are validated numerically, for predicting both the continuous and discrete spectrum
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