8,157 research outputs found
Equity trend prediction with neural networks
This paper presents results of neural network based trend prediction for equity markets.
Raw equity exchange data is pre-processed before being fed into a series of neural
networks. The use of Self Organising Maps (SOM) is investigated as a data classification
method to limit neural network inputs and training data requirements. The resulting primary
simulation is a neural network that can prediction whether the next trading period will be,
on average, higher or lower than the current. Combinations of pre-processing and feature
extracting SOM’s are investigated to determine the more optimal system configuration
Sensor data retransmission by satellite
There are no author-identified significant results in this report
Hydrologic data relay by satellite from remote areas
The author has identified the following significant results. Experimental use of LANDSAT data collection system and the GOES system has demonstrated the feasibility of using this technology to relay hydrologic data from remote areas on a near real time basis. The system has proved to be accurate, reliable, and cost effective
Use of satellites in data retransmission
There are no author-identified significant results in this report
Water survey of Canada: Application for use of ERTS-A for retransmission of water resources data
The author has identified the following significant results. Water resources data including water level, water velocity, precipitation, air temperature, ice-out indicator, data collection platform battery check and water stage recorder clock operation have been transmitted from remote areas in Canada using the ERTS Data Collection System. The system has met all requirements. The suitability of satellite retransmission has been demonstrated. The present network will be expanded to 28 in 1975
Hydrologic applications of the TIROS-N Argos data collection system
There are no author-identified significant results in this report
Retransmission of hydrometric data in Canada
The author has identified the following significant results. The feasibility of transmitting hydrometric data to polar orbiting spacecraft and using these data for quasi-operational purposes was demonstrated
Retransmission of hydrometric data in Canada
The author has identified the following significant results. The project continued to demonstrate the feasibility of transmitting hydrometric data in the LANDSAT and GOES mode and using these data operationally. All elements except for the GOES downlink at PASS were functioning well
Retransmission of Hydrometric Data in Canada
There are no author-identified significant results in this report
A study of the behaviour of newts
Many ethologists have found the sexual behaviour of animals to be a fruitful field of study. This thesis reports an investigation of the sexual behaviour of the Newt, an animal that has hitherto received little attention from ethologists. “The study includes a number of species of the European genus Triturus (Urodela, Salamandridae).
The Introductory Chapter presents information concerning the biological background to newt sexual behaviour, including life-history, general behaviour and sensory capacities, together with an account of the observational and experimental procedures used in the study.
The sexual behaviour of the Smooth Newt, Triturus vulgaris, is described. The behaviour consists of a complex sequence of actions which lead to the transfer of a spermatophore from male to female. This sequence may be repeated a number of times in the course of a sexual encounter.
By a form of sequence analysis a number of correlations are established between male and female behaviours. For some behaviours, temporal correlations are established also. The hypothesis that these correlations are indicative of causal relationships is tested by a number of experiments in which the behaviour of the female is manipulated.
Much of the sexual behaviour sequence can be understood in terms of male responses to the female's general movements and, at certain points in the later part of the sequence, to specific stimuli provided by the female. Not all transitions between male behaviours can be explained in these terms; some parts of his behaviour are stereotyped patterns which are unaffected by the female's behaviour.
The sexual behaviour of T. vulgaris is compared with that of the Palmate Newt, T. helveticus and the Alpine Newt, T. alpestris, using data obtained during this study, and with that of the Crested Newt, T. cristatus, using the account given by J.B. Nelson (1959). Differences in the details and in the overall pattern of sexual behaviour in these species are discussed.
Some pilot experiments to investigate reproductive isolation between T. vulgaris and T. helveticus are described. These suggest an ethological isolating mechanism based on female selective responsiveness to the male's display.
Newt sexual behaviour is discussed as a functional system and is compared with the sexual behaviour of some other animals. Some factors _ that affect courtship success (i.e. successful spermatophore transfer) are discussed.
The evolution of sexual behaviour within the genus Triturus is discussed. Evolutionary aspects are considered also in relation to the sexual behaviour of other Urodeles.
Motivational aspects of sexual behaviour are discussed, with particular reference to the concepts of behavioural conflicts and thwarting. It is argued that the newt courtship sequence is better understood in terms of stimulus-response relationships than through the use of motivational models
- …