scholarly journals Antlions are sensitive to subnanometer amplitude vibrations carried by sand substrates

2018 ◽  
Author(s):  
Vanessa Martinez ◽  
Elise Nowbahari ◽  
David Sillam-Dussès ◽  
Vincent Lorent
Keyword(s):  
Time Delay ◽  
Aggressive Behavior ◽  
Surface Waves ◽  
Aggressive Behaviour ◽  
Piezoelectric Transducers ◽  
Remarkable Feature ◽  
Laser Velocimetry ◽  
Low Level ◽  
Cataglyphis Cursor ◽  
Time Sequences

European pit-building antlions (Myrmeleon inconspicuus / Rambur 1842) are studied in their capacity to detect vibrations generated by the locomotion of an ant (Cataglyphis cursor) outside the pit. These locomotions have been recorded by laser velocimetry and copied in detail in their time sequences. The sequences are replicated by micro-controllers digital outputs acting on piezoelectric transducers placed several centimeters outside the peripheries of the pits: their actions on the surface of a sand media create surface waves with particle accelerations that are 3 orders of magnitude less than g, alleviating any possibility of sand avalanche towards the bottom of the pit. Depending on the amplitude of the vibrations, the antlions answer back, generally by sand tossing. One remarkable feature is the time delay from the start of the cue and the aggressive behavior induced by this cue. This time delay is studied versus the cue amplitude. The result of this work is that anlions answer back within minutes to cues with amplitudes between 1 to 2 nanometers at the level of their mechanosensors, and within seconds to these same cues if they are preceded by a sequence of signals at the Ångström amplitude. This induced aggressive behaviour evidences the sensitivity to vibrations at extremely low level.

scholarly journals The Aggressive Behaviour in Sports Among Athletes In A Public University

2021 ◽  
Vol 13 (2-2) ◽  
Author(s):  
Nur Nabila Bazli ◽  
Mohammad Saipol Mohd Sukor ◽  
Mastura Mahfar ◽  
Thuaibah@Suaibah Abu Bakar
Keyword(s):  
Aggressive Behavior ◽  
Aggressive Behaviour ◽  
Student Athletes ◽  
Collegiate Athletes ◽  
Education Institution ◽  
Public University ◽  
Field Situation ◽  
Different Types ◽  
Aggression Questionnaire ◽  
The University

  Collegiate athletes displayed different aggressive tendencies in an off-field situation based on the sports that they play. This study was conducted to identify the level and differences of aggressive behavior among athletes in a public university in Malaysia. A total of 91 student-athletes that represented different types of sports participated in this study. The instrument used to measure the aggressive behaviour among athletes was the Aggression Questionnaire. Descriptive statistics were used to identify the level of aggressive behaviour and the independent t-test was used to analyze the differences of aggressive behaviour based on demographic factors such as gender and types of sports. The findings revealed that the level of aggressive behaviour among athletes in the university are at a low level and there is no significant differences in aggressive behaviour based on gender and types of sports. This study contributes to the literature on the aggressive behavior in the context of student-athletes in higher education institution.

scholarly journals A STUDY ON AGGRESSIVE BEHAVIOUR AND EMOTIONAL MATURITY OF ADOLESCENT STUDENTS

2018 ◽  
Vol 6 (7) ◽  
pp. 10-15
Author(s):  
Mary Jeba N
Keyword(s):  
Aggressive Behavior ◽  
Moral Education ◽  
Aggressive Behaviour ◽  
Great Role ◽  
Anova Analysis ◽  
Emotional Maturity ◽  
Adolescent Students ◽  
The Mean ◽  
The Individual

The study intended to find out any relationship between aggressive behavior and emotional maturity of adolescents. Aggressive behavior is the reactionary and impulsive behaviour. The role of education is the modification of behaviour of the individual. So, school has a great role in mending the behaviour of the students. Moral education and mediation can be given to students. This may help them to get rid of the aggressive behaviour. The investigator used the mean, standard deviation, t-test and ANOVA (analysis of variance) to analyze the data and results were tabulated. The adolescent students show more aggressive behaviour than emotional maturity.

Aggressive Behaviour Between Territorial Cichlids (Astatotilapia Burtoni) in Relation To Rank and Territorial Stability

Behaviour ◽  
1987 ◽  
Vol 103 (4) ◽  
pp. 241-258 ◽  
Author(s):  
Anders Fernö
Keyword(s):  
Sexual Activity ◽  
Physical Aggression ◽  
Aggressive Behaviour ◽  
Low Rank ◽  
Low Level ◽  
Low Intensity ◽  
Boundary Disputes ◽  
Astatotilapia Burtoni ◽  
Higher Rank ◽  
Strong Competition

AbstractTerritorial mosaics of A. burtoni were studied in the laboratory. A difference in rank between neighbouring territorial fish was usually found, with the male with higher rank exhibiting more offensive behaviour and the opponent resisting more passively. A role asymmetry in boundary disputes was found in both high- and low-intensity aggression. Linear rank orders were formed. High rank was associated with a high aggressive and sexual activity towards non-territorial fish and a high mating succes". Territorial size was larger in superior males. A superior did not, however, generally expand his territory towards an inferior. This could be due to the involvement of escalated aggression with the reduction of territory. Most males of low rank did, however, eventually lose their territories. Establishing and losing territories were correlated with a low level of low-intensity aggression. Escalated fighting seldom occurred in spite of a strong competition for females, and aggression was usually limited to Frontal display and low-intensity aggression. Frontal display also played a key role for de-escalation of physical aggression. A. burtoni seems to follow the strategy "Honest", using a honestly graded display with few escalations.

Multi-Region Sequence Analysis of a Pregnancy-Related Oral Squamous Cell Carcinoma Exhibiting Low-Level Aggressive Behavior

2019 ◽  
Vol 28 (2) ◽  
pp. 188-195
Author(s):  
Davide Bartolomeo Gissi ◽  
Andrea Gabusi ◽  
Achille Tarsitano ◽  
Roberto Rossi ◽  
Tiziana Balbi ◽  
...  
Keyword(s):  
Dna Methylation ◽  
Squamous Cell Carcinoma ◽  
Oral Squamous Cell Carcinoma ◽  
Aggressive Behavior ◽  
Cell Carcinoma ◽  
Squamous Cell ◽  
Field Cancerization ◽  
Tumor Mass ◽  
Dna Mutation ◽  
Low Level

We analyzed the genetic and epigenetic profiles of an oral squamous cell carcinoma affecting a 41-year-old pregnant female. The patient presented with an oral mass located at the hard and soft palate with bone involvement and lymph node metastases (T4N1M0). She had been treated with multimodal radiotherapy and chemotherapy, and she is currently alive with no evidence of disease 8 years after treatment. DNA methylation and DNA mutation analyses were used to analyze multiple samples from the tumor mass and from the non-neoplastic mucosa to verify tumor heterogeneity. Genetic and epigenetic analyses revealed the presence of one shared TP53 driver mutation with the same DNA methylation profile in each of the 3 areas of the tumor mass; only 2 additional passenger mutations were detected, suggesting a simple clonal homogeneous carcinoma, which usually is associated with low-level aggressive behavior. Additionally, no genetic or epigenetic alteration in the non-neoplastic oral mucosa was detected, demonstrating the absence of field cancerization. The low aggressiveness of the lesion was confirmed by the patient being free of disease at a long-term follow-up examination. These data suggest a different molecular transformation pathway in pregnancy-related oral squamous cell carcinomas, providing new perspectives for further investigation.

scholarly journals Active Shock Absorber Control Based on Time-Delay Neural Network

Energies ◽  
2020 ◽  
Vol 13 (5) ◽  
pp. 1091
Author(s):  
Alexander Alyukov ◽  
Yuri Rozhdestvenskiy ◽  
Sergei Aliukov
Keyword(s):  
Neural Network ◽  
Time Delay ◽  
Shock Absorber ◽  
Learning Ability ◽  
Control Input ◽  
Low Level ◽  
External Data ◽  
Good Learning ◽  
Suspension Model ◽  
High Level

A controlled suspension usually consists of a high-level and a low-level controller. The purpose the high-level controller is to analyze external data on vehicle conditions and make decisions on the required value of the force on the shock absorber rod, while the purpose of the low-level controller is to ensure the implementation of the desired force value by controlling the actuators. Many works have focused on the design of high-level controllers of active suspensions, in which it is considered that the shock absorber can instantly and absolutely accurately implement a given control input. However, active shock absorbers are complex systems that have hysteresis. In addition, electro-pneumatic and hydraulic elements are often used in the design, which have a long response time and often low accuracy. The application of methods of control theory in such systems is often difficult due to the complexity of constructing their mathematical models. In this article, the authors propose an effective low-level controller for an active shock absorber based on a time-delay neural network. Neural networks in this case show good learning ability. The low-level controller is implemented in a simplified suspension model and the simulation results are presented for a number of typical cases.

scholarly journals Aggression towards Referees in Amateur Football in Spain: A Loglinear Approach

2019 ◽  
Vol 18 (3) ◽  
pp. 1-13 ◽  
Author(s):  
Diego Fuente ◽  
Enrique Cantón ◽  
Francisco Montes ◽  
María Ángeles Sanruperto Abella
Keyword(s):  
Aggressive Behavior ◽  
Aggressive Behaviour ◽  
Ad Hoc ◽  
The Other ◽  
Loglinear Model ◽  
The Third ◽  
Youth Football ◽  
Other Hand ◽  
The City

Aggressive behavior towards football referees is becoming increasingly common, and as a result we are getting used to it and coming to see it as an inevitable and intrinsic element of football matches. Spectators, players and coaches are all prone to take this view. This article studies how the types of aggression shown by these three groups towards the referee are related to one another, and how they are perceived by the referee, in amateur football. For this purpose, the phenomenon was assessed, using an ad-hoc form, both by an expert and by the referee, in 119 regional and youth football matches in the city of Valencia and surrounding municipalities. We analysed the data using a loglinear model, which enabled us to establish that from the referee’s perspective pairs of the above-mentioned groups influenced each other regardless of the attitude of the third group. On the other hand, departing from the traditional idea that aggressive behaviour by one of the groups determines the behaviour of the other two, the analysis of the expert’s opinions on the attitudes of the three groups led us to a model in which their respective actions were independent of one another.

Behaviour of the Koala, Phascolarctos cinereus (Goldfuss), in Captivity VI*. Aggression

1980 ◽  
Vol 7 (2) ◽  
pp. 177 ◽  
Author(s):  
M Smith
Keyword(s):  
Breeding Season ◽  
Aggressive Behaviour ◽  
Motor Pattern ◽  
Dominance Hierarchies ◽  
Phascolarctos Cinereus ◽  
Aggressive Interactions ◽  
Single Motor ◽  
Low Level ◽  
In Captivity

'In a colony of captive koalas, all aggressive behaviour was a variation on the single motor pattern of throwing a foreleg around an opponent and biting. Squabbles (the most common aggressive behaviour) were brief, low level interactions usually arising from the efforts of one koala to climb past or over another. Minor fghts involved only single bites and the combatants stayed in the same place; major ,fights involved multiple bites and changes of position. Dependent young were seldom involved in aggression. Between males. minor fights were essentially intensified squabbles, but major fights involved wrestling and chasing; they were more likely between males unfamiliar with each other, or those already aroused by, e.g., other aggressive interactions. Females became aggressive especially during pregnancy and at the end of lactation. At such times they stood their ground and vocalized at other koalas, especially males, but attacked only if the opponent came within reach. Although the opponent usually withdrew. sometimes a male seemed provoked to attack. Males sometimes attacked females without obvious provocation. Aggression was slightly more common in than outside the breeding season. Competition for females or food, dominance hierarchies, appeasement, and the defence of young were not seen.

scholarly journals OVERCOMING OF AGGRESSIVE BEHAVIOR OF PRIMARY SCHOOL CHILDREN THROUGH FAIRY TALE THERAPY

2021 ◽  
Vol 20 (2) ◽  
pp. 19-29
Author(s):  
Miopap Samvel Asatryan
Keyword(s):  
Primary School ◽  
Aggressive Behavior ◽  
Training Program ◽  
School Children ◽  
Fairy Tales ◽  
Aggressive Behaviour ◽  
Fairy Tale ◽  
Primary School Children ◽  
Primary Schoolchildren ◽  
Aggressive Reactions

The article provides definitions of aggression, the causes of its occurrence, as well as fairy tale therapy as a means of overcoming aggressive manifestations. A research was conducted to study the psychological characteristics of the aggressive behaviour of younger schoolchildren. The formative linear experiment was used. The method for diagnosing aggression Bass-Darky and Rosenzweig's test of measuring the aggressiveness were carried out. In the aggressive behavior of primary school children is dominated by negative and indirect aggression; verbal and physical aggression are moderately manifested; auto-aggression, insult and suspicion are weakly expressed. More than half of primary schoolchildren have a high level of aggressiveness. In the vast majority of pupils, aggressive reactions are directed to the environment, that is, the orientation of aggression is extrapunitive. In about a quarter of pupils, the orientation of aggression is impunitive, for what happened they attribute the blame to the situation. The weakest expression has the intrapunitive orientation of aggression, when the child considers himself responsible for the event. To overcome the aggressive manifestations of primary schoolchildren, a training program was used, in which therapeutic tales and training exercises were included. If before applying a training program for overcoming agressiveness, aggressive reactions of most younger schoolchildren were directed at others, and they considered others to be responsible for solving the problem, then after implementing the training program the results of the retest show that there has been a sharp increase in the rate of intrapunitive aggression. That is, children began to count, that the solution of the problem depends more on the person, and in case of failure, the person should blame not the other, but own identity. Therapeutic fairy tales are an effective way to overcome the aggressive behaviour of children in educational institutions.

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