Analysis of Cerenkov pulses recorded simultaneously at two sites

The agreement between measured distances to maximum for approx. 49 simultaneous Cerenkov pulse profiles from different sites is + or - approx. 0.1 km near 4.5 km and + or - 0.5 km near 7 km. Uncertainty in depths of maximum are approx. + or - 10 g sq and + or - 30 g cm/2 respectively. Usually the Hillas-Patterson simulation is able to fit both pulse shapes satisfactorily using a single N(x) profile

Process characteristics and design methods for a 300 deg quad OP amp

The results of process characterization, circuit design, and reliability studies for the development of a quad OP amplifier intended for use up to 300 C are presented. A dielectrically isolated complementary vertical bipolar process was chosen to fabricate the amplifier in order to eliminate isolation leakage and the possibility of latch up. Characterization of NPN and PNP junctions showed them to be suitable for use up to 300 C. Interconnect reliability was predicted to be greater than four years mean time between failure. Parasitic MOS formation was eliminated by isolation of each device

New electrical plethysmograph monitors cardiac output

Four-electrode impedance plethysmograph measures ventricular stroke volume of cardiac output of humans. The instrument is automatic, operates with only one recording channel, and minimizes patient discomfort

Analytical and experimental studies of an optimum multisegment phased liner noise suppression concept

Results are presented from detailed analytical studies made to define methods for obtaining improved multisegment lining performance by taking advantage of relative placement of each lining segment. Properly phased liner segments reflect and spatially redistribute the incident acoustic energy and thus provide additional attenuation. A mathematical model was developed for rectangular ducts with uniform mean flow. Segmented acoustic fields were represented by duct eigenfunction expansions, and mode-matching was used to ensure continuity of the total field. Parametric studies were performed to identify attenuation mechanisms and define preliminary liner configurations. An optimization procedure was used to determine optimum liner impedance values for a given total lining length, Mach number, and incident modal distribution. Optimal segmented liners are presented and it is shown that, provided the sound source is well-defined and flow environment is known, conventional infinite duct optimum attenuation rates can be improved. To confirm these results, an experimental program was conducted in a laboratory test facility. The measured data are presented in the form of analytical-experimental correlations. Excellent agreement between theory and experiment verifies and substantiates the analytical prediction techniques. The results indicate that phased liners may be of immediate benefit in the development of improved aircraft exhaust duct noise suppressors

Prototype construction of a compiler for network analysis feasibility study

Feasibility of unified compilers for network analysi

Aristotelian philosophy applied to interactive virtual media: on the effects of transportation on the player and the practical applications of virtual realities

Virtual reality is a new technology that blurs the line between what a person feels is real and knows is fake; putting the audience ‘inside’ a piece of art, a new ‘world’ that we can experience (like real life) in a first-person perspective. This technology has come about through the development of interactive virtual media, the product of ‘the evolution of poetry’ that Aristotle discovered and explained. Poetry is something that can hold and transfer meaning, specifically it is anything that can offer or represent the ‘what it is likeness’ of a particular concept or truth, this is what I refer to when I use the term ‘Poetry’. The concept of blurring the line between reality and fiction, gives rise to ‘the paradox of fiction’ and has been a component of art from its conception. We lose ourselves in a myth, a book, a song or a play, and we have emotions about imitations of (fictional) events (even though they are fictional), this losing oneself into poetry is what I will term ‘Transportation’. Virtual realities achieve this and can make us feel like we are inside a piece of art, by fully taking control of our perspective (our experiences), by putting the control of the art’s direction in our hands, and importantly, by captivating our full attention. What effects could this have on us as moral agents or as social beings? Aristotle began art criticism in his Poetics, pioneering the philosophy of aesthetics and preparing philosophers for their own explorations of new mediums of art. I plan on continuing this work in an Aristotelian exploration of the use of interactive virtual media and the notion of transportation. Not only will I use the lessons learnt from Aristotle’s work in Poetics, but will also consider an Aristotelian Eudemian framework when looking at the moral concerns of such an advanced form of poetry and the inherent ramifications of the ‘habituation’ that comes with its repetitive use. Such media is often seen as an unproductive and even sometimes damaging pastime, I will argue that not only does all poetry teach us in many ways, but interactive virtual media has the potential to teach us the ‘what it is likeness’ of particular experiences. It allows us to practice and attain ‘know how’ types of knowledge, this will be crucial to my Aristotelian philosophical exploration, and the revelations about the possible dispositional attitudes that could be gained from said practice in virtual environments. I will back this up with a comprehensive explanation of recent revelations in cognitive science, proving evidence for the habituation mechanism and the importance of our implicit memory in our judgement making processes. I will conclude that interactive virtual media provides the perfect medium for transportation, which results in the accumulation of new implicit memories in the player (habituation), and said environments will be able to be utilised for a variety of applications, one possibly being the practice of virtuous activity (Eudemian ethics)

Biodiversity informatics: the challenge of linking data and the role of shared identifiers

A major challenge facing biodiversity informatics is integrating data stored in widely distributed databases. Initial efforts have relied on taxonomic names as the shared identifier linking records in different databases. However, taxonomic names have limitations as identifiers, being neither stable nor globally unique, and the pace of molecular taxonomic and phylogenetic research means that a lot of information in public sequence databases is not linked to formal taxonomic names. This review explores the use of other identifiers, such as specimen codes and GenBank accession numbers, to link otherwise disconnected facts in different databases. The structure of these links can also be exploited using the PageRank algorithm to rank the results of searches on biodiversity databases. The key to rich integration is a commitment to deploy and reuse globally unique, shared identifiers (such as DOIs and LSIDs), and the implementation of services that link those identifiers

Development and evaluation of an impedance cardiographic system to measure cardiac output and other cardiac parameters Final progress report 1 Jul. 1969 - 31 Dec. 1970

Performance of impedance cardiograph for measuring heart rate and body fluid