A movement index for evaluation of honeybee activity in the observation hive

Author(s):  
Hidetoshi Ikeno ◽  
Ryuichi Okada ◽  
Mizue Ohashi ◽  
Toshifumi Kimura ◽  
Tadaaki Akamatsu ◽  
...  
Author(s):  
Dmitry Averchenko ◽  
Artem Aldyrev

The purpose of this chapter is to develop an analytical system for forecasting prices of financial assets with the use of artificial neural networks technology. Proposed by the authors, the analytical system consists of several neural networks, each of which makes the forecast of financial assets prices. The system includes recurrence (with feedback) neural networks with sigmoidal activation formula. This allows the networks to “remember” a sequence of reactions to the same stimulus. The learning process of neural networks is performed using an algorithm of back propagation of error. The key parameters of forecast for this analytical system are the indicators presented by the terminal MetaTrader 4-broker Forex Club: Average Directional и Movement Index; Bollinger Bands; Envelopes; Ichimoku Kinko Hyo; Moving Average; Parabolic SAR; Standard Deviation; Average True Range; and others.


1997 ◽  
Vol 81 (3) ◽  
pp. 707-718 ◽  
Author(s):  
Charles I. Abramson ◽  
Italo S. Aquino ◽  
Gerson A. Azeredo ◽  
James M. Price

Cold is often suggested as an ecological mechanism to prevent the migration of Africanized honey bees. The ability of Africanized honey bees to tolerate cold temperatures was investigated. In one study an observation hive was placed inside a refrigerator at 25°C. The study was conceptualized as a choice experiment in which the colony could remain in a cold environment or leave for a warm environment. Analysis indicated that the bees remained at 9 ± 1°C for 14 days before leaving. In a second series of studies, testing the tolerance to 0°C, 280 bees were placed individually in small metal tubes. The data gathered included survival rate, time to regain consciousness, and ability to feed. Analysis indicated that Africanized bees can survive for up to 3 hr. at 0°C with few ill effects. At 4 hr., however, the survival rate is low. Limitations of the study, the use of cold as a possible deterrent to honey bee mites, and suggestions for additional research are discussed.


2010 ◽  
Vol 104 (4) ◽  
pp. 1867-1871 ◽  
Author(s):  
Agustín Petroni ◽  
Federico Baguear ◽  
Valeria Della-Maggiore

In humans, the motor system can be activated by passive observation of actions or static pictures with implied action. The origin of this facilitation is of major interest to the field of motor control. Recently it has been shown that sensorimotor learning can reconfigure the motor system during action observation. Here we tested directly the hypothesis that motor resonance arises from sensorimotor contingencies by measuring corticospinal excitability in response to abstract non-action cues previously associated with an action. Motor evoked potentials were measured from the first dorsal interosseus (FDI) while human subjects observed colored stimuli that had been visually or motorically associated with a finger movement (index or little finger abduction). Corticospinal excitability was higher during the observation of a colored cue that preceded a movement involving the recorded muscle than during the observation of a different colored cue that preceded a movement involving a different muscle. Crucially this facilitation was only observed when the cue was associated with an executed movement but not when it was associated with an observed movement. Our findings provide solid evidence in support of the sensorimotor hypothesis of action observation and further suggest that the physical nature of the observed stimulus mediating this phenomenon may in fact be irrelevant.


Author(s):  
Toshifumi Kimura ◽  
Hidetoshi Ikeno ◽  
Mizue Ohashi ◽  
Ryuichi Okada ◽  
Etsuro Ito

1980 ◽  
Vol 112 (3) ◽  
pp. 321-326 ◽  
Author(s):  
N. Pomeroy ◽  
R. C. Plowright

AbstractTwo bumble bee observation hive designs are described. Both have a sloping floor to support peripheral brood clumps. One is temperature controlled, using insulated resistance wire as an internal heat source. The other is moulded from a concrete mixture consisting of horticultural Perlite, cement, and plaster of Paris. Techniques for the sanitation, feeding, and handling of laboratory colonies are described.


2015 ◽  
Vol 8 (2) ◽  
Author(s):  
Sangil Lee ◽  
Minho Lee ◽  
Hyeonggyu Park ◽  
Mun-Seon Chang ◽  
Ho-Wan Kwak

The goal of the present study was to examine whether intention type affects eye movement patterns in a change detection task In addition, we assessed whether the eye movement index could be used to identify human implicit intent. We attempted to generate three types of intent amongst the study participants, dividing them into one of three conditions; each condition received different information regarding an impending change to the visual stimuli. In the “navigational intent” condition, participants were asked to look for any interesting objects, and were not given any more information about the impending change. In the “low-specific intent” condition, participants were informed that a change would occur. In the “high-specific intent” condition, participants were told that a change would occur, and that an object would disappear. In addition to this main change detection task, participants also had to perform a primary task, in which they were required to name aloud the colors of objects in the pre-change scene. This allowed us to control for the visual searching process during the pre-change scene. The main results were as follows: firstly, the primary task successfully controlled for the visual search process during the pre-change scene, establishing that there were no differences in the patterns of eye movements across all three conditions despite differing intents. Secondly, we observed significantly different patterns of eye movement between the conditions in the post-change scene, suggesting that generating a specific intent for change detection yields a distinctive pattern of eye-movements. Finally, discriminant function analysis showed a reasonable classification rate for identifying a specific intent. Taken together, it was found that both participant intent and the specificity of information provided to the participants affect eye movements in a change detection task.


Animals ◽  
2019 ◽  
Vol 9 (6) ◽  
pp. 333 ◽  
Author(s):  
Viviana M. Bravo ◽  
Toby G. Knowles ◽  
Carmen Gallo

Marketing cattle through auctions increases marketing time, exposing animals to more stressful events. Within Chile, 37% of auctioned cattle are “calves”. To assess factors that may be affecting the welfare of calves during movement and penning, twelve markets were visited to evaluate behavioral indicators of welfare, handling, and facilities. Behavioral indicators during movement were classified into movement and other behaviors, and indicators during penning were classified into positive or negative behavioral welfare indicators. For each group of calves, an index was calculated based on a proportion of observed behavioral indicators. Statistical models were built to identify variables associated with changes in these indices. Presence of inappropriate driving, inadequate lighting, and slippery floor was associated with a movement index increase (poorer welfare). Negative tactile interactions were associated with an increase, and group size was associated with a decrease in movement index and other behavior indices. During penning, not mixing animals from different sources was associated with an increase and stocking density with a decrease in positive welfare index. Number of auctioned cattle, observation number, and not mixing with incompatible and/or with calves from different sources were factors associated with a decrease in negative welfare index, and the presence of males was associated with an increase. Behavioral welfare indicators were mostly associated with handling.


2019 ◽  
Vol 64 ◽  
pp. S89
Author(s):  
L. DelRosso ◽  
C. Lockhart ◽  
J. Wrede ◽  
M. Chen ◽  
M. Samson ◽  
...  

Sign in / Sign up

Export Citation Format

Share Document