scholarly journals Inertial Measures of Motion for Clinical Biomechanics: Comparative Assessment of Accuracy under Controlled Conditions – Changes in Accuracy over Time

PLoS ONE ◽  
2015 ◽  
Vol 10 (3) ◽  
pp. e0118361 ◽  
Author(s):  
Karina Lebel ◽  
Patrick Boissy ◽  
Mathieu Hamel ◽  
Christian Duval
Keyword(s):  
Comparative Assessment ◽  
Controlled Conditions ◽  
Over Time

Soft Computing Techniques in Civil Engineering

2010 ◽  
pp. 143-159
Author(s):  
Juan L. Pérez ◽  
Juan R. Rabuñal ◽  
Fernando Martínez Abella
Keyword(s):  
Genetic Programming ◽  
Evolutionary Computation ◽  
Soft Computing ◽  
Civil Engineering ◽  
Structural Concrete ◽  
Controlled Conditions ◽  
Classical Algorithm ◽  
Soft Computing Techniques ◽  
Over Time

Soft computing techniques are applied to a huge quantity of problems spread in several areas of science. In this case, Evolutionary Computation (EC) techniques are applied, in concrete Genetic Programming (GP), to a temporary problem associated to the field of Civil Engineering. The case of study of this technique has been centered in the prediction, over time, of the behavior of the structural concrete in controlled conditions. Given the temporary nature of the case of study, it has been necessary to make several changes to the classical algorithm of GP, among whom it can be emphasized the incorporation of a new operator that gives the GP the ability to be able to solve problems with temporary behavior. The obtained results shown that the proposed method has succeeded in improving the adjustment to the current regulations about creep in the structural concrete.

Soft Computing Techniques in Civil Engineering

2012 ◽  
pp. 1982-1997
Author(s):  
Juan L. Pérez ◽  
Juan Rabuñal ◽  
Fernando Martínez Abella
Keyword(s):  
Genetic Programming ◽  
Evolutionary Computation ◽  
Soft Computing ◽  
Civil Engineering ◽  
Structural Concrete ◽  
Controlled Conditions ◽  
Classical Algorithm ◽  
Soft Computing Techniques ◽  
Over Time

Soft computing techniques are applied to a huge quantity of problems spread in several areas of science. In this case, Evolutionary Computation (EC) techniques are applied, in concrete Genetic Programming (GP), to a temporary problem associated to the field of Civil Engineering. The case of study of this technique has been centered in the prediction, over time, of the behavior of the structural concrete in controlled conditions. Given the temporary nature of the case of study, it has been necessary to make several changes to the classical algorithm of GP, among whom it can be emphasized the incorporation of a new operator that gives the GP the ability to be able to solve problems with temporary behavior. The obtained results shown that the proposed method has succeeded in improving the adjustment to the current regulations about creep in the structural concrete.

scholarly journals The NCAR–FAA Snow Machine: An Artificial Snow-Generation System

2018 ◽  
Vol 35 (11) ◽  
pp. 2159-2168
Author(s):  
Scott D. Landolt ◽  
Roy M. Rasmussen ◽  
Alan J. Hills ◽  
Warren Underwood ◽  
Charles A. Knight ◽  
...  
Keyword(s):  
Mass Balance ◽  
Size Distribution ◽  
Liquid Water ◽  
Generation System ◽  
Fall Velocity ◽  
Atmospheric Research ◽  
Controlled Conditions ◽  
Precipitation Gauge ◽  
Cold Chamber ◽  
Over Time

AbstractThe National Center for Atmospheric Research (NCAR) developed an artificial snow-generation system designed to operate in a laboratory cold chamber for testing aircraft anti-icing fluids under controlled conditions. Flakes of ice are produced by shaving an ice cylinder with a rotating carbide bit; the resulting artificial snow is dispersed by turbulent airflows and falls approximately 2.5 m to the bottom of the device. The resulting fine ice shavings mimic snow in size, distribution, fall velocity, density, and liquid water equivalent (LWE) snowfall rate. The LWE snowfall rate can be controlled using either a mass balance or a precipitation gauge, which measures the snowfall accumulation over time, from which the computer derives the LWE rate. LWE snowfall rates are calculated every 6 s, and the rate the ice cylinder is fed into the carbide bit is continually adjusted to ensure that the LWE snowfall rate matches a user-selected value. The system has been used to generate LWE snowfall rates ranging from 0 to 10 mm h−1 at temperatures from −2 to −30°C and densities of approximately 0.1–0.5 g cm−3. Comparisons of the snow-machine fluid tests with the outdoor fluid tests have shown that the snow machine can mimic natural outdoor rates under a broad range of conditions.

Comparative Assessment of Novel Sailing Trapeze Harness Designs

1989 ◽  
Vol 5 (3) ◽  
pp. 289-296 ◽  
Author(s):  
Susan J. Hall ◽  
Jane A. Kent ◽  
Vern R. Dickinson
Keyword(s):  
Low Back Pain ◽  
Repeated Measures ◽  
Comparative Assessment ◽  
Myoelectric Activity ◽  
Low Back ◽  
Repeated Measures Anova ◽  
Muscular Tension ◽  
Pilot Work ◽  
Integrated Emg ◽  
Over Time

Prolonged trapezing during sailing often results in low back pain among elite sailors. Modifications of the trapeze harness have been proposed as one approach to ameliorating this problem. To evaluate six harnesses incorporating novel features that had tested well during pilot work, myoelectric activity was monitored at C5, T6, and L5 levels of sacrospinalis and at an abdominal site while five elite sailors wore the harnesses. Integrated EMG (IEMG) values were stored by a microcomputer at periodic intervals during each 10-min trial, as each subject maintained a static horizontal trapezing position in the laboratory. Factorial repeated-measures ANOVA indicated no change in IEMG values over time, but significant (p<0.001) differences among harnesses at all four electrode sites. Features of trapeze harness design that appear to minimize muscular tension include heavy, rigid padding throughout the harness, full-length shoulder-to-buttocks support of the trunk, and adjustable leg strap supports as opposed to a crotch strap.

scholarly journals Neoseiulus californicus preying on Tenuipalpus heveae

2020 ◽  
Vol 50 ◽  
Author(s):  
Eliamara Marques da Silva ◽  
Luciana Cláudia Toscano ◽  
Milene Alves-Eigenheer ◽  
Wilson Itamar Maruyama ◽  
Abimael Gomes da Silva
Keyword(s):  
Development Stage ◽  
Neoseiulus Californicus ◽  
Development Stages ◽  
Controlled Conditions ◽  
Daily Rate ◽  
Predation Efficiency ◽  
Over Time

ABSTRACT The spread of Tenuipalpus heveae Baker (Acari: Tenuipalpidae) can be controlled by managing predatory species such as Neoseiulus californicus (McGregor) (Acari: Phytoseiidae). This study aimed to evaluate the predation of N. californicus at different biological phases on T. heveae at different development stages. The experiments were carried out under laboratory-controlled conditions, counting the number of predated individuals by development stage after 24, 48 and 72 h. N. californicus, in all phases, consumed T. heveae, with a higher consumption of nymphs and larvae by adult predators. Both sexes of adult predators exhibited predation efficiency, but females showed a greater acceptance of adult preys than males. The daily rate of adult predation decreased over time; however, the highest consumption took place in the first 24 h.

Regulation of food intake in the goldfish

1961 ◽  
Vol 201 (5) ◽  
pp. 968-974 ◽  
Author(s):  
Paul Rozin ◽  
Jean Mayer
Keyword(s):  
Food Intake ◽  
Ambient Temperature ◽  
Normal Diet ◽  
Continuous Access ◽  
Controlled Conditions ◽  
Nutrient Value ◽  
Over Time

Goldfish were trained to press a lever. This response was followed by the delivery of a pellet of food. The fish were then allowed continuous access to the lever under controlled conditions, and their food intake was measured. Goldfish distribute their feeding responses fairly evenly over time, within the limits of the lighting cycle. Some fish eat mainly at night, some during the day, and others seem to be indifferent to the lighting cycle. Goldfish decrease their food intake by one-half to one-third in response to a drop in ambient temperature from 25 to 15 C, and show a corresponding increase in food intake when the temperature returns to 25 C. Goldfish increase their food intake significantly in response to dilution of their normal diet with kaolin, and thus seem to eat for calories or nutrient value.

Ecological Features of a Country House Water Supply

2019 ◽  
Vol 23 (2) ◽  
pp. 68-71
Author(s):  
G.I. Zubareva
Keyword(s):  
Water Quality ◽  
Water Supply ◽  
Optimal Choice ◽  
Comparative Assessment ◽  
Country House ◽  
Factors Affecting ◽  
Ecological Features ◽  
Quality Of Water ◽  
Over Time

Considered the most frequently used sources of autonomous water supply of a country house – manhole and well. It is shown that the chemical composition of natural water in these structures does not meet the requirements of SaNPiN 2.1.4.1175-02 and varies over time. The reasons for the change in the water quality in the manhole and the well and the ways to solve the problem are listed. The factors affecting the water quality in the manhole and the well are indicated – the characteristic of the water of the aquifer and the arrangement of the structures. The conclusion was made that it is impossible to make the optimal choice between a manhole or a well for the environmentally acceptable water supply of a country house for the quality of water in each of the water intakes. A comparative assessment of the manhole and the well is given for a number of indicators in order to optimize the choice between them.

Methylphenidate Dosage for Children With ADHD Over Time Under Controlled Conditions: Lessons From the MTA

2001 ◽  
Vol 40 (2) ◽  
pp. 188-196 ◽  
Author(s):  
BENEDETTO VITIELLO ◽  
JOANNE B. SEVERE ◽  
LAURENCE L. GREENHILL ◽  
L. EUGENE ARNOLD ◽  
HOWARD B. ABIKOFF ◽  
...  
Keyword(s):  
Children With Adhd ◽  
Controlled Conditions ◽  
Over Time

scholarly journals Associated costs of mitigation-driven translocation in small lizards

2021 ◽  
pp. 1-8
Author(s):  
Rafael Barrientos ◽  
Rodrigo Megía-Palma
Keyword(s):  
Locomotor Activity ◽  
Human Development ◽  
Habitat Loss ◽  
Body Condition ◽  
Positive Relationship ◽  
Management Tool ◽  
Controlled Conditions ◽  
Over Time

Abstract Mitigation-driven translocations represent an increasingly common management solution to reduce animal mortality and habitat loss caused by human development. Although they currently outnumber other translocation types, there is a lack of scientific approaches to evaluate the outcome of this management tool. We designed an experimental translocation with two groups of translocated males and two of control males of a small (6-14 g) lizard (totaling 120 individuals). Our results suggest that translocated individuals covered longer distances (53 vs. 18 m) from their respective release points in one month (on average), although this distance diminished over time. Displacing longer distances was associated with a body condition impoverishment and an increase in parasitization by ectoparasites. To the best of our knowledge, this is the first study that finds a positive relationship between covering longer distances and an increase in the number of mites. This was also explained by the initial mite load that lizards had, suggesting that controlling the infestation by mites is energetically demanding for lizards, being traded by locomotor activity. At least for those individuals in poorer body condition, we recommend the implementation of soft release (gradually accustoming individuals to their new environment by previously releasing them into controlled conditions) and deparasitization before accomplishing a mitigation-driven translocation.

scholarly journals Comparative Assessment of Cuspal Deflection in Premolars Restored with Bulk-Fill and Conventional Composite Resins

2020 ◽  
Author(s):  
Ebrahim Yarmohammadi ◽  
Shahin Kasraei ◽  
Yasaman Sadeghi
Keyword(s):  
Adverse Effect ◽  
Repeated Measures ◽  
Comparative Assessment ◽  
Composite Resins ◽  
Time Points ◽  
Repeated Measures Analysis ◽  
Maxillary Premolars ◽  
The Mean ◽  
Over Time

Objectives: It has been reported that bulk-fill composites simplify tooth restoration with no adverse effect on the success rate. This study sought to assess the cuspal deflection of premolars with mesio-occluso-distal (MOD) cavities restored with bulk-fill and conventional posterior composite resins. Materials and Methods: This in-vitro experimental study was conducted on 64 human maxillary premolars. MOD cavities were prepared on teeth and restored with Filtek P60 conventional composite and Filtek Bulk Fill flowable, X-tra fill, and X-tra base bulk-fill composites in four groups (n=16). Distance between the cusp tips was measured before, five minutes, 24 hours, 48 hours, and one week after restoration. The data were analyzed using repeated-measures analysis of variance (ANOVA) and Tukey’s test (α=0.05). Results: The mean±standard deviation (SD) of cuspal deflection at five minutes after the restoration was 13.5±5.3, 12.2±3.5, 11.3±4.4, and 10.4±3.7 µm for Filtek P60, Filtek Bulk Fill, X-tra fill, and X-tra base, respectively. ANOVA showed that bulk-fill composites did not cause a significant reduction in cuspal deflection compared to P60 (P>0.05). Cuspal deflection in all groups significantly decreased with time (P<0.05). Conclusion: Bulk-fill composites have no superiority over P60 in the reduction of cuspal deflection. The cuspal deflection was variable at different time points in all groups and decreased over time.

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