1948 ◽  
Vol 19 (10) ◽  
pp. 720-721 ◽  
Author(s):  
Homer T. Gittings
Keyword(s):  

1983 ◽  
Vol 15 (4) ◽  
pp. 429-432
Author(s):  
L. Arthur Leyenberger ◽  
Lawrence M. Paul

1930 ◽  
Vol 4 (1-4) ◽  
pp. 420-423
Author(s):  
Franklin C. Paschal
Keyword(s):  

1984 ◽  
Vol 52 (3) ◽  
pp. 280-281
Author(s):  
Gerald S. Harmon ◽  
David H. Blanchard

Author(s):  
Raka Yusuf ◽  
Harni Kusniyati

The use of multi-tier schema has become general phenomena in moodle application on web base in nowadays. Usually is layer presentation on the first tier. On the second tier of the application layer and layer data on the third tier. This is modelling on this paper to looking application performance on web base who is using three-tier model and the impact of value amount in the server who is controlling of each on the tier for the performance. The example in the case who is used for this modelling is the application of Moodle for the college courses in XYZ University. The framework of modelling who is used is Simply which is the simulation framework activity base on the district is using phyton language programming. The simulation on simply can using to a certain interval timer or unlimited (the ideal until for the work all is serviced). The results of the simulation are showing the best obtained by using a single server on each of layer by optimizing the speed of process on the server.


2020 ◽  
Vol 7 (10) ◽  
pp. 201614
Author(s):  
Floris M. van Beest ◽  
Larissa T. Beumer ◽  
Marianna Chimienti ◽  
Jean-Pierre Desforges ◽  
Nicholas Per Huffeldt ◽  
...  

The existence and persistence of rhythmicity in animal activity during phases of environmental change is of interest in ecology, evolution and chronobiology. A wide diversity of biological rhythms in response to exogenous conditions and internal stimuli have been uncovered, especially for polar vertebrates. However, empirical data supporting circadian organization in behaviour of large ruminating herbivores remains inconclusive. Using year-round tracking data of the largest Arctic ruminant, the muskox ( Ovibos moschatus ), we modelled rhythmicity as a function of behaviour and environmental conditions. Behavioural states were classified based on patterns in hourly movements, and incorporated within a periodicity analyses framework. Although circadian rhythmicity in muskox behaviour was detected throughout the year, ultradian rhythmicity was most prevalent, especially when muskoxen were foraging and resting in mid-winter (continuous darkness). However, when combining circadian and ultradian rhythmicity together, the probability of behavioural rhythmicity declined with increasing photoperiod until largely disrupted in mid-summer (continuous light). Individuals that remained behaviourally rhythmic during mid-summer foraged in areas with lower plant productivity (NDVI) than individuals with arrhythmic behaviour. Based on our study, we conclude that muskoxen may use an interval timer to schedule their behavioural cycles when forage resources are low, but that the importance and duration of this timer are reduced once environmental conditions allow energetic reserves to be replenished ad libitum. We argue that alimentary function and metabolic requirements are critical determinants of biological rhythmicity in muskoxen, which probably applies to ruminating herbivores in general.


1972 ◽  
Vol 35 (3) ◽  
pp. 707-710 ◽  
Author(s):  
J. M. Walker ◽  
W. Nichparenko

This paper discribes a solid state digital display instrument that functions as: (1) a reaction timer, (2) an interval timer, (3) an event counter, or (4) a predetermining counter. Parts for the instrument can be purchased for approximately $125 and assembled in 25 to 30 hr.


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