Development of Air Combat Effectiveness Simulation and Analysis Scheme for beyond Visual Range (BVR) Case

This paper focuses on the simulation of Beyond Visual Range (BVR) Air Combat using calculation of Probability of Kill (PK) and Supremacy to analyze the effectivity of the tactics and strategies. The developed simulation program is expected to be used as a means of developing tactics, weapons systems evaluation and to support other air combat system applications. The simulation system can be utilized so that strategy for using weapons and better tactics for maneuver can be determined and formulated in the face of an aerial battle. The simulation illustrates how an aerial battle in a 2D plane took place. The battle occurs between two sides and can also cover case of many against many air battle. Fighters maneuver will be generated based on logic and defined tactic by providing input in the form of initial conditions. Formulation / functions, parameters and variables influencing the fighter effectiveness will be taken into account. These elements are modelled using a dynamic and open scenario approach. The simulation used a method called 'Missile Launch Envelope Model' for computing PK of missile along its way to the target. Simulation results for one versus one and many versus many cases show that the developed system can produce good and relatively realistic prediction of the outcome. Further modification of simulation program include fly out modeling to the missile.

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Adaptation of turnip mosaic potyvirus to a specific niche reduces its genetic and environmental robustness

Virus Evolution ◽

10.1093/ve/veaa041 ◽

2020 ◽

Vol 6 (2) ◽

Author(s):

Anamarija Butković ◽

Rubén González ◽

Inés Cobo ◽

Santiago F Elena

Keyword(s):

Mutation Rates ◽

Permissive Temperature ◽

Fitness Component ◽

Temperature Conditions ◽

Environmental Perturbations ◽

Genetic Robustness ◽

Congruence Theory ◽

The Face ◽

Environmental Robustness ◽

Two Sides

Abstract Robustness is the preservation of the phenotype in the face of genetic and environmental perturbations. It has been argued that robustness must be an essential fitness component of RNA viruses owed to their small and compacted genomes, high mutation rates and living in ever-changing environmental conditions. Given that genetic robustness might hamper possible beneficial mutations, it has been suggested that genetic robustness can only evolve as a side-effect of the evolution of robustness mechanisms specific to cope with environmental perturbations, a theory known as plastogenetic congruence. However, empirical evidences from different viral systems are contradictory. To test how adaptation to a particular environment affects both environmental and genetic robustness, we have used two strains of turnip mosaic potyvirus (TuMV) that differ in their degree of adaptation to Arabidopsis thaliana at a permissive temperature. We show that the highly adapted strain is strongly sensitive to the effect of random mutations and to changes in temperature conditions. In contrast, the non-adapted strain shows more robustness against both the accumulation of random mutations and drastic changes in temperature conditions. Together, these results are consistent with the predictions of the plastogenetic congruence theory, suggesting that genetic and environmental robustnesses may be two sides of the same coin for TuMV.

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Situation assessment for beyond-visual-range air combat situation assessment based on dynamic Bayesian network

2013 25th Chinese Control and Decision Conference (CCDC) ◽

10.1109/ccdc.2013.6560993 ◽

2013 ◽

Cited By ~ 1

Author(s):

Li Fu ◽

Jianbo Liu ◽

Feihu Chang ◽

Guanglei Meng

Keyword(s):

Bayesian Network ◽

Dynamic Bayesian Network ◽

Situation Assessment ◽

Air Combat ◽

Visual Range

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Ambidexterity [L'Homme droit et l'Homme gauche: les Ambidextres]. (Revue philosophique, October, 1901.) Biervliet, J. J. van.

Journal of Mental Science ◽

10.1192/bjp.48.201.348 ◽

1902 ◽

Vol 48 (201) ◽

pp. 348-349

Author(s):

Havelock Ellis

Keyword(s):

Uniform Method ◽

Careful Study ◽

The Face ◽

The Right ◽

Two Sides ◽

Careful Investigation

Professor van Biervliet has now completed his very careful study of right-sidedness and left-sidedness (already summarised in the Journal) by a still more careful investigation of ambidextrous persons. In the first place by photography, according to a special and uniform method, he finds that in the ambidextrous the two sides of the face, as well as the arms, are fairly alike, the face being slightly more developed on the right side, as among left-sided people, but not in so marked a degree. They occupy much the same position, indeed, throughout the investigation. When compared with right-sided and left-sided people as regards sensory acuteness, it is found that while the right-sided have predominant sensory acuteness on the right side, both the left-sided and the ambidextrous can see further, hear better, possess more acute tactile and muscular sense, on the left side, so that ambidexterity may be regarded as a variety of left-sidedness of more symmetrical anatomical type. In all respects the ambidextrous almost or quite resembled the left-sided.

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Beyond-Visual-Range Air Combat Tactics Auto-Generation by Reinforcement Learning

2020 International Joint Conference on Neural Networks (IJCNN) ◽

10.1109/ijcnn48605.2020.9207088 ◽

2020 ◽

Author(s):

Haiyin Piao ◽

Zhixiao Sun ◽

Guanglei Meng ◽

Hechang Chen ◽

Bohao Qu ◽

...

Keyword(s):

Reinforcement Learning ◽

Air Combat ◽

Visual Range

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There are Two Sides to Every COIN

European Journal of East Asian Studies ◽

10.1163/15700615-01401008 ◽

2015 ◽

Vol 14 (1) ◽

pp. 76-97 ◽

Cited By ~ 3

Author(s):

Stefano Ruzza

Keyword(s):

Turning Point ◽

Economic Incentives ◽

Historical Background ◽

National Union ◽

Continuity And Change ◽

The Face ◽

Peripheral Areas ◽

The Government ◽

Current Transition ◽

Two Sides

The capacity of Myanmar’s government to effectively rule and administer peripheral areas of the country has been challenged since independence by a vast array of non-state armed groups (NSAGs), and the country is home to the most long-lasting insurgencies still active today. The core interest of this article rests on analysing the degree of continuity and change in the strategy enacted by Myanmar’s government in order to counter, contain and re-absorb insurgencies in the wake of the recent liberalisation process. The government activity vis-à-vis insurgencies is assessed in two core dimensions: economic and military. The analysis is developed in diachronic perspective, spanning three key phases. The first, meant to provide the essential historical background and benchmark, is the post-1989 period, characterised by the implementation of the ceasefires. The other two focus on the current transition, splitting it into two (2008–2011 and 2011–2015), taking Thein Sein’s new peace plan as a turning point. Moving through these three phases the paper assesses how Myanmar’s government achieves a balance between military pressure and economic incentives in the face of three major insurgencies: in Shan state, versus various NSAGs; against the Kachin Independence Organisation (KIO); and against the Karen National Union (KNU).

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Development of an Air Combat Performance Measure

Proceedings of the Human Factors Society Annual Meeting ◽

10.1177/154193128803201804 ◽

1988 ◽

Vol 32 (18) ◽

pp. 1207-1211

Author(s):

Gary S. Thomas ◽

David C. Miller

Keyword(s):

Performance Feedback ◽

Diagnostic Performance ◽

Performance Measure ◽

Regression Analyses ◽

Rater Agreement ◽

Air Combat ◽

Measure Of Performance ◽

Development And Validation ◽

Neutral Posture ◽

Visual Range

The purpose of this research was to formulate a unitary measure of performance for simulated one-versus-one, within visual range, air-to-air combat. The measure will serve as a criterion for the development and validation of specific measures of ACM skill that can be used to provide diagnostic performance feedback to pilots. Two experiments were conducted in which fighter pilots served as judges and rank-ordered, from most to least desirable, hypothetical ACM engagement outcomes. Outcome variables included (1) whether or not the hypothetical pilot achieved a “kill,” (2) whether or not he survived the mission, (3) the percent of time the pilot was in an offensive, defensive, or neutral posture, (4) length of engagement, and (5) posture at the beginning and end of the engagement (offensive, defensive, or neutral). In order to determine inter-rater agreement among judges in Experiment I, their rankings were correlated. Correlations ranged from .93 to .99. Pilots' rankings of engagement outcomes were subjected to linear regression analyses to derive equations that could be used as a unitary measure of ACM success. The regression equation in Experiment I accounted for 95% of the variance in rankings, and the composite regression model calculated in Experiment II accounted for more than 70% of the variance.

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Validation of the Explanatory Concept for Decision Support in Air-to-Air Combat

Proceedings of the Human Factors and Ergonomics Society Annual Meeting ◽

10.1177/107118139704100107 ◽

1997 ◽

Vol 41 (1) ◽

pp. 28-31

Author(s):

Jeffrey L. Crick ◽

Stephen J. Selcon ◽

Maddalena Piras ◽

Craig Shanks ◽

Chris Drewery ◽

...

Keyword(s):

Decision Support ◽

Data Fusion ◽

Graphical Representation ◽

Ecological Validity ◽

Graphical Displays ◽

Air Combat ◽

Control Version ◽

Explanatory Concept ◽

Military Pilots ◽

Visual Range

A decision-support aid developed for use by pilots in air-to-air combat was evaluated in a simulated beyond-visual-range combat scenario in which military pilots competed against one another head-to-head. Combat performance was assessed on a range of operationally-valid measures with three different versions of a head-down display showing integrated information derived from data fusion. One version presented graphical, dynamic representations of both ownship's and the enemy's missile performance envelopes (launch success zones); another showed only the launch success zones of the enemy aircraft; and a third, control version showed neither form of graphical representation. Superior attacking performance was demonstrated with the display showing both ownship and enemy launch success zones, while more successful evasive performance was associated with the display showing only enemy launch success zones. Greater levels of situation understanding were associated with the display showing both ownship and enemy launch success zones. The results lend ecological validity to the use of explanatory graphical displays in providing decision support for pilots in air-to-air combat.

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Cooperative Occupancy Decision Making of Multi-UAV in Beyond-Visual-Range Air Combat: A Game Theory Approach

IEEE Access ◽

10.1109/access.2019.2933022 ◽

2020 ◽

Vol 8 ◽

pp. 11624-11634

Author(s):

Yingying Ma ◽

Guoqiang Wang ◽

Xiaoxuan Hu ◽

He Luo ◽

Xing Lei

Keyword(s):

Game Theory ◽

Decision Making ◽

Theory Approach ◽

Air Combat ◽

Visual Range ◽

Multi Uav

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A Potential Density Gradient Dependent Analysis Scheme for Ocean Multiscale Data Assimilation

Advances in Meteorology ◽

10.1155/2017/9315601 ◽

2017 ◽

Vol 2017 ◽

pp. 1-13

Author(s):

Hongli Fu ◽

Jinkun Yang ◽

Wei Li ◽

Xinrong Wu ◽

Guijun Han ◽

...

Keyword(s):

Data Assimilation ◽

Density Gradient ◽

Initial Conditions ◽

Ocean Model ◽

Potential Density ◽

3 Dimensional ◽

Ocean Data Assimilation ◽

Variational Framework ◽

Analysis Scheme ◽

Density Surface

This study addresses how to maintain oceanic mixing along potential density surface in ocean data assimilation (ODA). It is well known that the oceanic mixing across the potential density surface is much weaker than that along the potential density surface. However, traditional ODA schemes allow the mixing across the potential density surface and thus may result in extra assimilation errors. Here, a new ODA scheme that uses potential density gradient information of the model background to rescale observational adjustment is designed to improve the quality of assimilation. The new scheme has been tested using a regional ocean model within a multiscale 3-dimensional variational framework. Results show that the new scheme effectively prevents the excessive unphysical projection of observational information in the direction across potential density surface and thus improves assimilation quality greatly. Forecast experiments also show that the new scheme significantly improves the model forecast skills through providing more dynamically consistent initial conditions

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