Circuit World最新文献

{"title":"À l’écoute du choeur entier : réflexions sur une écologie et une économie plus holistiques de la composition","authors":"Terri Hron","doi":"10.7202/1091900ar","DOIUrl":"https://doi.org/10.7202/1091900ar","url":null,"abstract":"Cette réflexion sur la création musicale dans l’Anthropocène dessine trois aspects de la pratique de l’auteure. Le premier concerne le désapprentissage des catégories et des définitions de la musique et de la création musicale encouragées et parfois imposées par la culture dominante, souvent basées sur des valeurs extractivistes et patriarcales. Le deuxième invite à privilégier l’écoute comme pratique active, cultivant une plus grande présence aux autres êtres, humains et au-delà. Le troisième repose sur la conviction que même les petits gestes peuvent se répéter comme des fractales à travers un système, parce que ce à quoi nous prêtons attention grandit et parce que nous pouvons au moins cesser d’exercer des exclusions et des oppressions.","PeriodicalId":50693,"journal":{"name":"Circuit World","volume":"66 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91030029","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Faire de la musique dans l’Anthropocène : comment composer avec les temps de crise ?1","authors":"John Luther Adams, Nicolas Donin","doi":"10.7202/1091899ar","DOIUrl":"https://doi.org/10.7202/1091899ar","url":null,"abstract":"Dans ce bref essai initialement paru en 2015 dans Slate, l’auteur s’interroge sur la relation entre l’activité de création artistique et la conscience des désastres liés à l’Anthropocène : peut-on et faut-il encore se concentrer sur des oeuvres d’art en se détachant du monde ? Évoquant son engagement de jeunesse en tant qu’activiste écologiste en Alaska, Adams se rappelle avoir choisi d’être compositeur parce qu’il était, dans ce rôle, irremplaçable. Pour lui, s’engager pleinement dans l’activité créatrice, sans s’assigner d’objectif politique ni même de thématique à évoquer, est précisément ce qui rend possible une expressivité authentique de sa musique, libre de charrier d’éventuelles significations sociales et capable d’inspirer un renouveau de la conscience chez ses auditeur·trice·s. La responsabilité de l’artiste porte sur son art, qui en retour contribue à transformer la manière d’être au monde de notre espèce.","PeriodicalId":50693,"journal":{"name":"Circuit World","volume":"32 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84889079","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"L’artiste, entre production et destruction","authors":"Fabien Lévy","doi":"10.7202/1091904ar","DOIUrl":"https://doi.org/10.7202/1091904ar","url":null,"abstract":"Nous connaissons maintenant les causes de la crise climatique comme l’inévitable solution : produire et consommer moins, et mieux. Ce texte est un plaidoyer pour une nouvelle définition de la valeur, matérielle ou immatérielle, qui prenne en compte dans tous les domaines ce qui est produit, mais également ce qui est détruit, que cela concerne les humains, le monde du vivant, ou Gaïa dans son ensemble. Quelles seraient alors les conséquences pratiques, sociétales et esthétiques de cette nouvelle « comptabilité » de la valeur sur l’art ? Nous concluons avec ce que nous appelons maintenant un « idéal Hindewhu » de la musique.","PeriodicalId":50693,"journal":{"name":"Circuit World","volume":"150 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77389482","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Composition musicale et souci écologique : vers une nouvelle justesse ?","authors":"Nicolas Donin","doi":"10.7202/1091898ar","DOIUrl":"https://doi.org/10.7202/1091898ar","url":null,"abstract":"","PeriodicalId":50693,"journal":{"name":"Circuit World","volume":"6 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72895879","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Nervous Systems—Composing Unruliness in the Technosphere","authors":"S. Maier","doi":"10.7202/1091903ar","DOIUrl":"https://doi.org/10.7202/1091903ar","url":null,"abstract":"Proceeding from the contention that the dawn of the Anthropocene may have as much to do with our relationship to technology as it does with climate change, Stefan Maier discusses recent work that explores the unruly behaviours of particular sound technologies. As a foil to functionalist accounts of technology—accounts that attempt to understand technology entirely through the lens of normative utility—Maier discusses his idiosyncratic treatment of instruments, sound-systems and software. Here, tools are mined for their alien(ating) potential—the capacity of certain technologies to project well beyond their designated use, often to monstrous ends. In particular, Maier discusses his recent multi-media installation Deviant Chain (2019), which uses a machine-learning-driven speech-synthesizer to generate abject, nonsensical speech. These machinic glossolalia form the basis for a constructed language, which features extensively in the work.","PeriodicalId":50693,"journal":{"name":"Circuit World","volume":"16 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83651673","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Capitalocène ? [illustrations du numéro]","authors":"Oli Sorenson","doi":"10.7202/1091902ar","DOIUrl":"https://doi.org/10.7202/1091902ar","url":null,"abstract":"","PeriodicalId":50693,"journal":{"name":"Circuit World","volume":"181 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77127029","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Composer l’espace sonore en interaction avec le monde","authors":"P. Leroux","doi":"10.7202/1091905ar","DOIUrl":"https://doi.org/10.7202/1091905ar","url":null,"abstract":"Cet article explore l’idée que si l’approche habituelle de l’espace sonore dans la composition musicale est, en général, d’ordre pratique, il existe, cependant, une attitude consistant à mettre en rapport celui-ci avec notre propre intériorité spatiale. En effet, concevoir, comme écouter, la mise en espace des sons, c’est d’une certaine façon extérioriser dans l’espace sonore du monde notre espace intérieur. Après avoir décrit ce dernier, et proposé l’oeuvre musicale et son écoute comme seuils entre les espaces intérieur et extérieur, le texte scrute les relations qui s’établissent entre eux. À partir de celles-ci est proposé un nouveau type de rapport entre la personne qui compose l’espace musical et cet espace lui-même. Au lieu d’établir une relation à sens unique avec le monde, dans laquelle celui-ci n’est que l’objet de notre action, la composition peut alors devenir également le lieu de notre transformation.","PeriodicalId":50693,"journal":{"name":"Circuit World","volume":"14 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87952380","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Grid-connected solar photovoltaic-fed brushless DC motor drive for water pumping system using colliding body optimization technique","authors":"B. N. Kar, P. Samuel, J. K. Pradhan, A. Mallick","doi":"10.1108/cw-09-2021-0252","DOIUrl":"https://doi.org/10.1108/cw-09-2021-0252","url":null,"abstract":"\u0000Purpose\u0000This paper aims to present an improvement to the power quality of the grid by using a colliding body optimization (CBO) based proportional-integral (PI) compensated design for a grid-connected solar photovoltaic-fed brushless DC motor (BLDC)-driven water pumping system with a bidirectional power flow control. The system with bidirectional power flow allows driving the pump at full proportions uninterruptedly irrespective of the weather conditions and feeding a grid when water pumping is not required.\u0000\u0000\u0000Design/methodology/approach\u0000Here, power quality issue is taken care of by the optimal generation of the duty cycle of the voltage source converter. The duty cycle is optimally generated by optimal selection of the gains of the current controller (i.e. PI), with the CBO technique resulting in a nearly unity power factor as well as lower total harmonic distortion (THD) of input current. In the CBO technique, the gains of the PI controller are considered as agents and collide with each other to obtain the best value. The system is simulated using MATLAB/Simulink and validated in real time with OPAL RT simulator, OP5700.\u0000\u0000\u0000Findings\u0000It was found that the power quality of grid using the CBO technique has improved much better than the particle swarm optimization and Zeigler–Nichols approach. The bidirectional flow of control of VSC allowed for optimum resource utilization and full capacity of water pumping whatever may be weather conditions.\u0000\u0000\u0000Originality/value\u0000Improved power quality of grid by optimally generation of the duty cycle for the proposed system. A unit vector tamplate generation technique is used for bidirectional power transfer.\u0000","PeriodicalId":50693,"journal":{"name":"Circuit World","volume":" ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45439940","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Voltage sag compensation at load side in armor fighting vehicles using ultra capacitor","authors":"S. N, Hosimin Thilagar S.","doi":"10.1108/cw-09-2021-0247","DOIUrl":"https://doi.org/10.1108/cw-09-2021-0247","url":null,"abstract":"\u0000Purpose\u0000The purpose of this paper rapid development of various voltage sag compensation techniques in DC bus using ultra-capacitors (UCs) provides satisfactory results when compared with required peak power demand for shorter duration. Later, UCs have been used as floating capacitors [1] [2]. Various UCs are available based on internal resistances which also rely on its manufacturing materials, similar to double layer capacitors.\u0000\u0000\u0000Design/methodology/approach\u0000This paper demonstrates UCs based voltage sag compensation at load side under different working modes of hydraulic pack (HP) in an armored fighting vehicle (AFV). The main sources to supply the HP are 24 V, 400 Ahr battery bank and 20 kW main generator. HP is considered to be the highest power load of a system. 2,500 A inrush current was drawn by HP during initial conditions, and also, this system works in both elevation and azimuth mode. Voltage sag has been varied from 15 to 24 V for different modes. But as per the military standard, electrical systems should operate between 18 and 32 V DC. Because of insufficient terminal voltage, required energy cannot be attained and supplied to the loads. The proposed topology compensated the voltage sag and maintains nominal voltage on a DC bus. The devised circuit has been verified under all possible operating loads such as continuous, intermittent and momentary. The same has been simulated using MATLAB/Simulink and was experimentally verified. The minimum voltage maintained in a DC bus is 22.2 V in simulation, while experimentally, it was 24.2 V.\u0000\u0000\u0000Findings\u0000For getting higher percentage of efficiency, secondary energy system configuration, mainly designed for electrical vehicles, is needed. It was implemented and same was tested with the fighting vehicle system[1]. The proposed configuration comprises of bank of an UC and a battery bank. The system was finally implemented in AFVs.\u0000\u0000\u0000Originality/value\u0000The goods vehicles made of UCs can hold very minimum energy because of minimum density of energy. The modified AFV can have minimum charging as well as discharging of rate of energy and, thus, power[3][4]. Thus, the proposed idea of modified vehicle system has influence over significant change in the state of charge.\u0000","PeriodicalId":50693,"journal":{"name":"Circuit World","volume":" ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42486874","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Hidden multiwing chaotic attractors with multiple stable equilibrium points","authors":"Quanli Deng, Chunhua Wang, Ya-Ting Wu, Hairong Lin","doi":"10.1108/cw-01-2021-0009","DOIUrl":"https://doi.org/10.1108/cw-01-2021-0009","url":null,"abstract":"\u0000Purpose\u0000The purpose of this paper is to construct a multiwing chaotic system that has hidden attractors with multiple stable equilibrium points. Because the multiwing hidden attractors chaotic systems are safer and have more dynamic behaviors, it is necessary to construct such a system to meet the needs of developing engineering.\u0000\u0000\u0000Design/methodology/approach\u0000By introducing a multilevel pulse function into a three-dimensional chaotic system with two stable node–foci equilibrium points, a hidden multiwing attractor with multiple stable equilibrium points can be generated. The switching behavior of a hidden four-wing attractor is studied by phase portraits and time series. The dynamical properties of the multiwing attractor are analyzed via the Poincaré map, Lyapunov exponent spectrum and bifurcation diagram. Furthermore, the hardware experiment of the proposed four-wing hidden attractors was carried out.\u0000\u0000\u0000Findings\u0000Not only unstable equilibrium points can produce multiwing attractors but stable node–foci equilibrium points can also produce multiwing attractors. And this system can obtain 2N + 2-wing attractors as the stage pulse of the multilevel pulse function is N. Moreover, the hardware experiment matches the simulation results well.\u0000\u0000\u0000Originality/value\u0000This paper constructs a new multiwing chaotic system by enlarging the number of stable node–foci equilibrium points. In addition, it is a nonautonomous system that is more suitable for practical projects. And the hardware experiment is also given in this article which has not been seen before. So, this paper promotes the development of hidden multiwing chaotic attractors in nonautonomous systems and makes sense for applications.\u0000","PeriodicalId":50693,"journal":{"name":"Circuit World","volume":" ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45647381","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}