Simulation and Analysis of Grid Formation Method for UAV Clusters Based on the 3 × 3 Magic Square and the Chain Rules of Visual Reference

Large-scale unmanned aerial vehicle (UAV) formations are vulnerable to disintegration under electromagnetic interference and fire attacks. To address this issue, this work proposed a distributed formation method of UAVs based on the 3 × 3 magic square and the chain rules of visual reference. Enlightened by the biomimetic idea of the plane formation of starling flocks, this method adopts the technical means of airborne vision and a cooperative target. The topological structure of the formation’s visual reference network showed high static stability under the measurement of the network connectivity index. In addition, the dynamic self-healing ability of this network was analyzed. Finally, a simulation of a battlefield using matlab showed that, when the loss of UAVs reaches 85% for formations with different scales, the UAVs breaking formation account for 5.1–6% of the total in the corresponding scale, and those keeping formation account for 54.4–65.7% of the total undestroyed fleets. The formation method designed in this paper can maintain the maximum number of UAVs in formation on the battlefield.

Ripple Frequency Determined via a Novel Algorithm is Associated with Atrial Fibrillation Termination and Freedom from Atrial Fibrillation

Background: Persistent atrial fibrillation (PsAF) is a complex arrhythmia and achieving a high rate of freedom from recurrence of AF by catheter ablation has been challenging. CARTO® Ripple map has previously been identified as one possible method to improve ablation outcomes. Objective: To evaluate the relationship of AF termination and 18-month freedom from AF with Ripple Frequency measured via a novel CARTO® software algorithm. Methods: PsAF patients who underwent first time ablation were included. PV antral isolation was performed followed by locations with visually identified fast Ripple activations until AF termination. Patients were followed for 18 months. Retrospective analysis was performed using a novel CARTO® software algorithm to analyze Ripple Frequency. The Ripple Frequency algorithm quantifies amplitude changes in the bipolar electrogram over time. Results: 82 maps from 54 patients (mean age 65.4, 67% male) were analyzed. The top quartile of Ripple Frequency corresponded to a visual reference with 96.1% sensitivity and 84.7% specificity. AF terminated during ablation in 90.7% of patients: PV antrum alone (14.8%), or PV plus non-antral sites (85.2%). The top quartile of Ripple frequency was present in non-antral sites associated with AF termination with an 89.6% sensitivity and 87.7% specificity. After 18 months and a mean of 1.2 ablations, 53/54 patients (98.1%) were free of AF and 85.2% were free of any atrial arrhythmia. Conclusion: Automated analysis of CARTO® Ripple Frequency demonstrated good sensitivity and specificity for detecting atrial regions in PsAF where ablation is associated with AF termination and freedom from AF after 18 months.

Exploring the Representation of Cows on Dairy Product Packaging in Brazil and the United Kingdom

Food packages must communicate mandatory information, but they can also be used for marketing practices such as promotion and are a communication pathway from industry to consumer. Considering that cows are the main beings affected by the dairy industry, it is essential to scrutinise what dairy product packages convey about them. The aims of this study are to analyse the occurrence of reference to cows on the packaging of dairy products in popular supermarket retail stores in Brazil and the United Kingdom and to discuss ethical implications of promotional practices of dairy producers. We found that in both countries most packaging does not refer to cows at all. In the UK, an average of 31% of the packaging used some visual reference to cows, and in Brazil an average of 15% of packaging used some visual reference to cows. We identified four modalities of cow signifiers with a strong common appeal to nature that reflect and reaffirm an idyllic narrative of milk production. Our findings reflect the concept of absent referent, coined by Carol Adams, both on the packages containing some type of cow representation and on the packages not containing any. Considering that it might influence the consumer’s understanding and attitude towards cows, we highlight that the lack of adequate information about cows’ conditions and the obscuring of problematic issues in cows’ exploitation through the globalization of the happy cow narrative are two important issues to be placed on the Marketing Ethics concerns.

Morphology and Weight-length Relationships for the First Six Instars of Cherax quadricarinatus (von Martens, 1868)

Cherax quadricarinatus (redclaw) aquaculture has not achieved the industry growth that had been predicted in the early days of development. Provision of quality juvenile crayfish seed stock has been identified as a critical factor in overcoming industry development inertia. Hatchery technology has been developed to produce independent craylings and a nursery phase is now being developed to nurture the delicate craylings to a more advanced and robust juvenile stage, suitable for pond stocking. As part of the nursery development, clear definitions of the successive stages from egg through the first several instars, are required. Although some morphological descriptions of the early stages of redclaw have been made, the characteristics and nomenclature for stages from egg through to an advanced juvenile need clarification. A naming system is proposed (Egg, L1, L2, J1, J2 and J3) for the first six instars from egg, based on gross morphology and allometric relationships. Egg volume, wet weight and ocular carapace length (OCL) were analysed through linear regression. Based on these variables, the size of each instar is defined. Descriptions and photographs of the six instars provide a visual reference for identification. Five of the six instars had a significant relationship between wet weight and OCL. Both significantly increased for each successive instar. Lyophilized (dry) weight was not significantly different between stages until after instar J1, where endogenous feeding begins. The growth of the first four instars, in terms of wet weight and OCL but not dry weight, suggests an extra endogenous source of nutrition in addition to the yolk supply. Branchial water uptake during ecdysis has been proposed as a route for dissolved organic matter or small particulate matter to be acquired by the crayfish during the lecithotrophic, nonexogenous feeding stages, as an additional food source that might further enhance growth and survival.

Consumable Indigeneity: A Visual Strategy in the Promotion of Natural Products

Central to this paper is to offer an assessment of the notion of indigeneity as a visual reference in the promotion of food natural products. The underlying premise is that widespread assumptions about indigenous epistemologies are manipulated to increase the marketability of items destined for human consumption. To varying extents and in varying ways, a(n) (obscure) link between the products in question and ‘unpolluted’ native communities allegedly legitimize claims about their purity, freshness and wholesomeness. By using social media posts, YouTube videos, advertisement ads and food packaging designs as main objects of study, this paper focuses on the visuality of indigeneity as a marketing strategy for a certain line of food products. As I intend to show, visual codes are used to suggest connections between contents of the products, Indigenous knowledge and health-promoting properties.

Símbolos de masculinidad(es). Investigación para la creación de una propuesta

"The present text emerges as a process of artistic research that aims to elaborate a visual proposal about the problematic of masculine identity in the current social and cultural context. For this, it is necessary to generate a theoretical framework on the subject of gender, starting with the feminist theories and the studies of masculinity, which will allow to establish the categories of analysis from which the imaginary will arise for the elaboration of the visual proposal. It starts from the notions of the gender understood as social construction, and therefore establishes a visual reference link with the city as a material manifestation of the structures of meaning that delimit the processes of elaboration of identity of the individuals. Finally, on the basis of a semiotic analysis methodology regarding the set of signs and symbols that make up the imaginary built from the categories proposed by the theoretical framework, a visual proposal will be articulated through pictorial language that poses a questioning the rigidity of these structures, alluding to the diversity of masculinities that are experienced today."

Visually Induced Motion Sickness on the Horizon

Visually induced motion sickness is an unpleasant but common side-effect of many simulations and VR-applications. We investigated whether an earth-fixed reference frame provided in the simulation is able to reduce motion sickness. To do so, we created a moving starfield that did not contain any indicators of the spatial orientation of the observer. As the observer was simulated to move through the randomly oscillating starfield, a time-to-contact task had to be carried out. Two colored stars on collision course with each other had to be spotted, then they disappeared and the time of their collision had to be judged. Eye-movements, task performance, and motion sickness were recorded. This condition without visual reference to the observer's upright was supplemented with three conditions containing either an earth-fixed fixation cross, an earth-fixed horizon line, or a line that was yoked to the head. Results show that only the earth-fixed horizon was able to significantly reduce visually induced motion sickness. Thus, a mere earth-stationary anchor does not suffice, a clear indication of earth horizontal seems necessary to reap a modest benefit.

Tinjauan Ilustrasi Cover Novel Harry Potter Edisi Indonesia Karya Nicolas Fiber Ditinjau Dari Elemen Visual

The cover illustration of the Harry Potter novel has many variants in various parts of the world, by bringing their respective nusions represented by each element presented by the illustrator. The cover illustration of the Indonesian edition of the Harry Potter novel by Nicholas Filbert is one of the official covers of the Indonesian edition of the Harry Potter novel. By reviewing the visual elements presented by the illustrator qualitatively, it can be seen that the visual elements are related to the concepts and nuances offered by the illustrator. This study aims to review the visual elements in the cover illustration of Harry Potter and the Goblet of Fire. By collecting data in the form of images, articles, as well as sources related to the cover, illustrators, which are the sources of researchers in reviewing and finding new findings related to visual elements in the cover illustration of Harry Potter and the Goblet of Fire. By using a qualitative method, from the data obtained by the researcher, the researcher gets information that will be the result related to the visual cover element. The findings of this study indicate that of all the visual elements reviewed, it is found that the illustrator tries to make the illustrations The difference is quite noticeable from cover illustrations from other parts of the world. The illustrator also tries to present the uniqueness of the illustrator, namely the illustration that is dense and fills all the empty spaces and is directed at one of the Indonesian peculiarities which is expressed in visual elements making Batik a visual reference, namely on color and composition.