Main Pole Research Articles

Strategies of Displacement in Artists’ Periodicals from the 1970s: <i>Neon de Suro</i>, <i>Schmuck</i>, <i>Commonpress</i>, and <i>La Città di Riga</i>

During the 1960s and 1970s, artists’ periodicals flourished as a new artistic medium. Strikingly, artists behind these alternative publications often claimed a peripheral position, assuming a geographical anchorage far from the capitals and main artistic centres. This paper addresses how the notion of periphery manifests itself in four European artists’ periodicals published during the 1970s. It will focus on their distribution strategies, their ideological positioning, the works they disseminated, and the artists’ writings and statements they featured. First, the analysis of three European alternative periodicals — Neon de Suro (Spain, 1975–82), Schmuck Magazine (England, 1972–76), and Commonpress (Poland, 1977–91) — will highlight how a peripheral position far from the capitals and the main artistic poles could become a strength, even a real editorial strategy. Such preoccupations were not, however, reserved for artists outside the official art scene: the question of periphery also found its place, albeit in different ways, in more institutionalized periodicals. This will be evident in the case of the Italian periodical La Città di Riga (1976–77), the focus of the second part of this paper, which negotiated the idea of centre and periphery right from its name. Through the case studies of these four periodicals and the analysis of coeval theoretical contributions, this paper aims to shape an elastic notion of the relationship between centre and periphery, at the same time derived from and applicable to the experimental editorial strategies of artists’ periodicals from the 1970s.

Historiographic imaginary and hypotheses of heredity in the configuration of Romanian cultural identity

This paper analyses the ways in which Romanian culture struggles to forge, at the level of historical and cultural discourse, an identity, a “personality”, and a specificity. It observes, within the process of forging its identity through a series of avatars, the discursive strategies through which specificity is revealed as an essential form of national uniqueness as well as the compensatory trends of identity fabrication. The paper also attempts to highlight the forms of historical and literary mystification through which, over time, Romanian culture responded to complexes related to its age, identity, belatedness, heredity, legitimacy, etc. Thus, the analysis reveals that, in essence, all the efforts, complexes and myths through which an identity was negotiated at the level of the histories of literature and Romanian historiographical texts betray, in fact, the same spectrum of the Identity-Otherness dialectic. Romanian culture, like other emerging cultures, was forced, first to survive and, later, in order to have a potential for prosperity, to define itself as a distinct entity by relating to the surrounding cultural reality, its growth and evolution taking place either under the sign of antagonism (i.e. a refusal of allogeneic import), or under that of synchronism (as permeabilization with regard to foreign influence), but, necessarily, as a reference to the Other. Moreover, the paper highlights, at the discursive level, the two main poles that have obsessively polarized the questions of descent and heredity within Romanian culture: its Roman and Dacian ancestries. The nuanced intentions underpinning the cultural need for international recognition by means of belonging as well as differentiation are discussed in the process.

Веб-ориентированный подход к трансформации систем координат геоцентрического типа

Recently in modern geoinformatics, the task of transforming coordinate systems has been one of the most significant. In this case, coordinate processing is performed for various projections, supported by many geographic information systems and the corresponding software libraries. At the same time, problems associated with transformation into specialized coordinate systems for example geomagnetic ones remain practically unsolved. Moreover, such a conversion is necessary to describe various geophysical processes, the occurrence and course of which largely depend on the parameters of the main magnetic poles of the Earth. In the paper, the authors proposed a web-based approach to transforming a geographic coordinate system into a geomagnetic one and ensuring prompt results based on the original spatiotemporal parameters. The architecture of the web solution was modernized by combining various web patterns; it provides support for a plug-in structure and loose coupling of program modules. It is shown that the proposed solution does not depend on the type of the consumer and can be used with interfaces of various kinds, provided that the appropriate interaction protocol is used. The performed computational experiments showed that calculations of geomagnetic coordinates based on the mentioned algorithm match to the known expressions and models

Selection of power supply scheme for controlled excitation converters in traction electric motors of single-phase DC electric locomotives

The article focuses on the development of an effective design and algorithms for automatic control of singlephase DC electric locomotives according to the laws of constant traction force and power without switching electrical devices within power electric circuits. Methods of mathematical modelling for electromagnetic, electromechanical, and mechanical processes by MatLab, Simulink, and SimPowerSystems software were used to address this problem. The nonlinearities of the magnetisation curve were taken into account, along with the influence of eddy currents from the coils of the main and additional poles in traction motors. Structural and parametric synthesis of a power electrical circuit and control algorithms by controlled bridge IGBT converters were used in the simulation. The object of the research was an electrotechnical complex, including a 9840 kW three-stack electric locomotive 3ES5K “Ermak”. On the basis of the research results, it is recommended to use a power electrical circuit with two reversible converters for each of the three sections on the electric locomotive. These converters provide power to four 820 kW traction motors and a group power supply for controlled bridge IGBT converters shunting the field coils for axial traction control. The calculations confirmed the applicability of a scheme for individual control of traction electric motors and excitation currents, ensuring a smooth increase in the traction force of an electric locomotive. The developed algorithm of axial traction control ensures a smooth increase in this force and creates the optimal conditions for coupling the wheels of an electric locomotive with rails. These solutions can be used in the manufacture and modernisation of new and existing electric locomotives

РЕЗУЛЬТАТЫ СРАВНИТЕЛЬНЫХ РЕСУРСНЫХ ИСПЫТАНИЙ СИСТЕМ ИЗОЛЯЦИИ КЛАССА НАГРЕВОСТОЙКОСТИ Н (180°С) ТЯГОВЫХ ДВИГАТЕЛЕЙ ЭЛЕКТРОВОЗОВ С ИСПОЛЬЗОВАНИЕМ ПОЛИЭФИРКЕТОНОВОЙ И ПОЛИИМИДНОЙ ПЛЕНОК

The operation of electric locomotive traction motors in conditions of constantly increasing temperature and humidity naturally leads to a decrease in the resistance of the body insulation of the coils of the main and auxiliary poles, which then leads to insulation breakdown and engine failure. In the general statistics on TED breakdowns, the percentage of failure due to low insulation resistance is up to 30%.
 Manufacturers of electrical insulation are constantly working to increase its reliability, using modern systems of polymer materials for this purpose. This article provides a brief description of the insulation systems of traction electric motors of heat resistance class H (180 °C) based on polyethyrketone and polyimide films. The main normative documents on the basis of which the assessment of insulation characteristics was carried out are indicated. Insulating tapes based on fiberglass and mica, mass-produced by ZEIM Elinar LLC, were used as objects of research. The methods are given, the equipment and the main results of resource tests of various insulation systems are indicated. According to the test results, it is shown that the system based on a polyester ketone film is in no way inferior in terms of heat resistance to a system based on a polyimide film.

Sub-harmonic-based Cost-effective Brushless Wound Rotor Synchronous Machine Topology

This paper proposes a sub-harmonic-based brushless wound rotor synchronous machine (WRSM) topology. The proposed topology involves two three-phase stator windings with a different number of turns. Both windings are linked in parallel and are provided with current from a single inverter. One of these windings is a four-pole winding while the second winding is a two-pole winding. This arrangement generates a magneto-motive force (MMF) in the air-gap of the machine comprising of two components: a regular fundamental MMF and a sub-harmonic MMF. The fundamental component produces the main stator field whereas the sub-harmonic component generates a sub-harmonic field that is utilized to produce a harmonic current in a two-pole rotor harmonic winding. The induced harmonic current is rectified to inject direct current (DC) to the field winding and produce a four-pole rotor magnetic field. The four-pole rotor magnetic field when magnetically interacts with the same number of the main stator field poles producing torque. Finite element analysis (FEA) is carried out to confirm the operation and achieve the electromagnetic behavior of theproposed topology.

Eddy Effect and Dynamic Response of High-Speed Solenoid Valve with Composite Iron Core.

To alleviate the Eddy effect of the high-speed solenoid valve (HSV) and improve its dynamic response speed, a novel HSV with a composite iron core is presented. The time-step finite element method is used to establish and verify the numerical simulation of HSV coupling multiple physical fields. Then, the Eddy effect and dynamic response characteristics of the conventional and composite HSVs are further compared and analyzed. The results showed that the Eddy current loss in the main pole was the largest for the conventional HSV, accounting for 72.5% and 64.4% in the actuation and release processes, respectively. It was found that the Eddy effect of the composite HSV was obviously weakened, and the total Eddy current losses in the actuation and release processes were reduced by 58.8% and 38.7%, respectively. Meanwhile, the actuation response time and release response time of the composite HSV were shortened by 15.6% and 18.5%, respectively. In addition, increasing the peak voltage further shortened the actuation response time of the composite HSV, but had no significant effect on the response time of the conventional HSV.

Application of hybrid excitation in a DC motor for drive of transport rolls in metallurgical industry

Purpose. To determine the effectiveness of the application of hybrid excitation for DC motors of medium power. Estimate the influence of the location of the permanent magnet of the main pole core on the magnitude of the magnetic flux created by it. Methodology. The classical theory of electric machines, the calculation of the magnetic field by the finite element method and analytical comparison were used to conduct the research. Results. The feasibility of using hybrid excitation for DC motors of medium power has been confirmed. The use of hybrid excitation in an experimental direct current motor made it possible to increase the excitation magnetic flux by 11%. This will make it possible to reduce the current load of the excitation winding, increase the reliability of the motor and reduce electrical losses on the excitation. The optimal location of the permanent magnet, according to the criterion of the maximum magnetic excitation flux, is its location at the main pole shoe along the air gap. Originality. The difference between the conducted research and others is that the condition of the research was to keep the dimensions of its motor, the excitation winding and the interpoles winding unchanged. Practical value. The obtained results will allow the designers of dc motors with hybrid excitation to avoid wrong decisions during further research and development of these motors.

Energy Balance, Water Demand, and Crop Coefficient of Acid Lime in the Oriental Amazon

Energy and water dynamics are crucial for citrus development in the Eastern Amazon. This study aimed to determine the energy balance, water demand, and crop coefficient of acid lime in the northeast region of Pará. A micrometeorological tower was installed in the center of the experimental area to monitor meteorological variables between October 2020 and December 2021. The energy balance and water demand were obtained by the Bowen ratio method. Kc was determined by the ratio between crop and reference evapotranspiration. The results obtained indicate that 63% of the available energy was used by latent heat in the rainiest period, while 60% was used during the less rainy period. Sensible heat used 32% and 34% during the most and least rainy periods, respectively. Soil heat presented a low variation, with an average of 5% for the entire period. Water consumption of the acid lime during the experiment was 1599 mm, with a daily mean of 3.70 mm day−1, while the mean value of Kc was 1.4. These results allow for the design of adequate water supply protocols for the crop in the main citrus pole in the Amazon region.

Research on the torque performance for two multi-pole bilayer magnetorheological fluid couplings

This paper studies on the permanent magnets configuration on the transmission torque of the multi-pole bilayer magnetorheological (MR) coupling. Based on the electromagnetic field theory, the magnetic circuit models of traditional permanent magnet array (TPMA) and Halbach permanent magnet array (HPMA) are established, and the magnetic flux density within the MR fluid working gaps has been derived in order to evaluate the merits of the designed MR coupling. A 3D FE magnetic-fluid analysis has been necessary following the initial conceptual analysis, in order to study the influence of key parameters on the transmission torque. The results show that the transmission torque of the MR coupling with Halbach permanent magnet array is 33.45% higher than that of the ordinary permanent magnet array, with a same structure size. For the MR coupling with Halbach permanent magnet array, the unilateral magnetic focusing effect is better with the increase of the residual flux density of the secondary magnetic pole as well as the radial length of magnetic pole. And the single side magnetic focusing effect is the best when the main magnetic pole is 15°. The influence of the magnetic pole angle on the transmission torque has been further studied.

Does PLEX® Elite 9000 OCT Identify and Characterize Most Posterior Pole Lesions in Highly Myopic Patients?

High myopia (HM) is defined as an axial length (AL) ≥ 26 mm that may result in various pathologies that constitute pathologic myopia (PM). The PLEX® Elite 9000 (Carl Zeiss AC, Jena, Germany) is a new swept-source optical coherence tomography (SS-OCT) underdevelopment that allows wider, deeper and more detailed posterior-segment visualization; it can acquire ultra-wide OCT angiography (OCTA) or new ultra-wide high-density scans in one image. We assessed the technology's ability to identify/characterize/quantify staphylomas and posterior pole lesions or image biomarkers in highly myopic Spanish patients and estimate the technology's potential to detect macular pathology. The instrument acquired 6 × 6 OCTA, 12 × 12 or 6 × 6 OCT cubes, and at least two high-definition spotlight single scans. A hundred consecutive patients (179 eyes; age, 51.4 ± 16.8 years; AL, 28.8 ± 2.33 mm) were recruited in one center for this prospective observational study. Six eyes were excluded because images were not acquired. The most common alterations were perforating scleral vessels (88.8%), classifiable staphyloma (68.7%), vascular folds (43%), extrafoveal retinoschisis (24%), dome-shaped macula (15.6%), and more uncommonly, scleral dehiscence (4.46%), intrachoroidal cavitation (3.35%), and macular pit (2.2%). The retinal thickness of these patients decreased, and the foveal avascular zone increased in the superficial plexus compared with normal eyes. SS-OCT is a novel potent tool that can detect most main posterior pole complications in PM and may provide us with a better understanding of the associated pathologies; some pathologies were identifiable only with this new kind of equipment, such as perforating scleral vessels, which seem to be the most common finding and not so frequently related to choroidal neovascularization, as previously reported.

Community Landscape Preferences for Reuse of Soviet‐Era Post‐Agricultural Brownfields—What's the Difference?*

AbstractReuse preferences for post‐agricultural brownfields on former socialist agricultural premises in CEE countries are likely to be diverse and may depend on communities' experiences. Our research question is to reveal, through a questionnaire survey of 774 respondents from 180 communities, the difference in reuse preferences among communities with different experiences: communities where former collective farm sites had been abandoned (leaving a post‐agricultural brownfield), those where such sites had remained in continuous agricultural use, and those where such sites had been abandoned and later remediated or reused. The responses from the three types of communities were compared using Kruskal–Wallis tests and the structure of preferences was analyzed by Non‐Metric Multidimensional Scaling. Communities with an existing post‐agricultural brownfield prefer housing and leisure activities, while communities with sites in continuous agricultural production prefer agrarian uses. Two main poles of choice were identified—productive and non‐productive uses. While productive uses are preferred by respondents from communities with continuous agricultural production, non‐productive uses are preferred by communities with former post‐agricultural brownfields. The presence of post‐agricultural brownfields within the community is an important factor in determining a community's preferences for its reuse. When agricultural sites are abandoned, communities' preferences for its reuse also change.

The clustering of knowledge-intensive business services in Greater Mexico City, 2010 through 2020

This article analyzes knowledge-intensive business services (KIBS) clustering and location patterns in Greater Mexico City. Although there is evidence of the importance of KIBS clustering as a factor that precedes innovation, no empirical work has applied point pattern analysis methods to identify intrametropolitan patterns. Little is known about KIBS firms clustering in Mexico and emerging economies in general. This study responds to both challenges, using the M and m functions, point pattern analysis methods that allow capturing concentration intensity and overdensity of same-type KIBS firms, respectively. Firm-level data are taken from Mexico’s National Statistics and Geography Institute’s (INEGI) open-source databases for 2010 and 2020. Results suggest different clustering patterns given our proposed KIBS classification. Overall, the clustering intensity of KIBS firms by class has increased during the analyzed period (2010–2020). Also, although central Greater Mexico City is the main clustering pole of attraction, urban subcenters display KIBS firms clustering depending on proposed KIBS classes. Clustering patterns are explained given existing intrametropolitan infrastructure and value-added differences, but also within- and between-class concentration variations. Despite the lack of firm-level economic data, results allow inferring possible agglomeration mechanisms behind clustering patterns.

Features, problems and opportunities for the development of transport corridors in the Eurasian Economic Union

International transport corridors are a manifestation of transport links between states with the goal to expand economic contacts and develop transit traffic between them. International transport corridors ensure the coordination of transport systems of the participating states for the implementation of prompt, safe, large-scale and cost-effective supply of goods on a regular long-term basis. International transport corridors within the EAEU countries unite various types of transport routes, transport infrastructure facilities, vehicles and transport authorities. The decisive factor in the development of international transport corridors within the EAEU is the spatial localization of this integration grouping in the center of Eurasia between the European Union and China as the two main economic poles. Such location of the EAEU countries determines their opportunities for the transit of goods through their territory. However, the transport complex of the EAEU faces a number of problems that can be minimized through the implementation of promising projects for the development of transport and logistics infrastructure based on attracting investments and coordinating management decisions in the field of regulation of mutual transportation. This study examines the features of international transport corridors passing through the territory of the EAEU countries, analyzes the potential and problems of their development, and identifies opportunities for the implementation of large transport and logistics projects.

Spatial distribution and characterization of consumers of E-grocery services in sicily

The present research aims to provide new insights into e-commerce patterns. The study investigates the correlations between variables related to demographics, residence and online food and beverage purchasing habits. Data was acquired through the administration of an online questionnaire in 2022. The results helped identify the location of the city most affected by the analyzed phenomenon. The novelty of the research focused on the analyzed area of island type characterized by the strong food and wine traditions and the need to want to analyze what possible effects the growth in demand for e-grocery may have on certain parts of the city. The results laid the foundations for more profound studies on demand for e-grocery relative to an island context. Moreover, the findings make it possible to investigate in subsequent steps different types of correlations between socio-demographic and spatial variables connected to the dislocation of homes and the main poles of attraction for the purchase of physical and virtual food and drink markets.

Little Amal’s New York Journey: The Big Puppet in the Big Apple

Little Amal’s New York Journey: The Big Puppet in the Big Apple

Avaliação de sustentabilidade para alocação de unidades de processamento de resíduos de placas de circuito impresso: O caso brasileiro

Abstract Waste Printed Circuit Boards (WPCB) are sources of valuable elements. In most developing countries, the WPCBs of formal chains are exported to treatment overseas given the absence of proper recycling plants, transferring the high-added value to developed nations. This study proposed a method to identify the best locations to implement WPCB recycling facilities considering sustainability criteria. The method was applied to the Brazilian case and consisted of state and municipal levels analysis based on 11 indicators related to the three sustainability dimensions, logistics criteria and geoprocessing tools. The results suggested São Paulo state (SP) as the main pole for WPCB processing in Brazil, with an estimated potential of WPCB generation of almost 24 t/d, and São Caetano do Sul and Jundiaí as the main favourable WPCB recycling municipalities. This study demonstrated that sustainable logistics for WPCB value recovery in developing countries is possible and desirable for achieving more circular patterns.

213: ONE SHOCK TREATED WITH ANOTHER: NEW-ONSET ATRIAL FIBRILLATION AFTER HIGH-VOLTAGE ELECTRICAL INJURY

Introduction: Development of atrial fibrillation following electrical injury has been rarely reported in literature. This can place medical providers in a situation where they are uncertain on how to manage such event. We present a case of high voltage electrical injury (7200V) resulting in new onset atrial fibrillation. Description: A 38-year-old electric line worker with no previous medical history came in with complaint of new onset palpitations and lightheadedness that started an hour prior to arrival. Patient stated he was standing on a boom lift, pressure-washing a church’s tower when his lance touched an electrical wire overhead. The lines were coming from a main electric pole estimated to be 7200V that connected to the transformer. Patient felt a shock pass through his right hand down to the rest of his body for a few seconds, and then he fell. He was not wearing any gloves. He denied any loss of consciousness, alcohol use, chest pain or any previous heart condition. In the ED, he was found to be in atrial fibrillation with heart rate ranging from 110-150. His CPK was 295 units/L and troponin was < 6 ng/L. Patient received IV diltiazem 15mg and IV amiodarone 150mg. He was started on amiodarone drip, admitted to ICU for monitoring and transitioned to Metoprolol 25mg BID and Xarelto 15mg daily the next day before discharge. Three weeks later, he underwent transesophageal echocardiogram (TEE) guided electrical cardioversion for persistent atrial fibrillation. Discussion: Electrical injury can induce cardiac arrhythmias via different mechanisms. The sheer energy of the electric current could directly stimulate the myocytes. It could also impair the sodium-potassium adenosine triphosphatase transporter which plays a major role in electrical-mechanical activity of cardiac muscle. Myocardial necrosis can also lead to production of new arrhythmogenic foci. Troponin and CPK are not always strong indicators of myocardial injury, however, high CK levels >400 units/L may be associated with longer hospitalization, and a greater risk of skin grafting or amputation. Atrial fibrillation in setting of electrical injury is managed with the use of beta blockers, anti-arrhythmics and in some cases, electrical cardioversion.

KAJIAN ETNO-FEMINISME SIRI BONGKOK DALAM TRADISI ROKO MOLAS POCO PADA MASYARAKAT TIMUR DESA BENTENGKUWU NUSA TENGARA TIMUR

One of the local wisdoms that uphold the equality of women is still seen in the process of building a traditional house or mbaru gendang in the Roko Molas Poco tradition found in the eastern community of Bantengkuwu village, East Nusa Tenggara. Roko means shoulder rite, Molas means beautiful girl, while Poco comes from the mountain. The main pillar or hunchback series used to build the house is symbolized by a beautiful girl or woman. The Roko Molas Poco tradition is the tradition of carrying the best wood (siri bongkok) together from the mountain carried out by people in a village who want to build a traditional house or Mbaru Gendang. This study uses an ethnofeminist approach with a qualitative type of research. The subject of this research is the community in the village of Bentengkuwu, East Nusa Tenggara, the object of which is siri bongkok (main pole) in the roko molas poco tradition. The data collection stage is in the form of interviews, documentation, and literature studies. The data that has been recorded through the interview process is then analyzed by reducing the data, then analyzing and describing it in the form of a research report. The results showed that the tradition of building a traditional house, the main pillar symbolized by the girl has a value that upholds the dignity of women, the girl sitting on the main pole which is used as the main pillar is respected and treated well, because the people in Bentengkuwu village interpret that the girl who rides on the wood as a sanctity and protector.

Improved Recording Performance With Writer Design and Joint Learning-Based Neural Network for Heat-Assisted Interlaced Magnetic Recording

Heat-assisted interlaced magnetic recording (HIMR) further increases the areal density with the interlaced track layout architecture compared to conventional heat-assisted magnetic recording. However, besides the 2-D inter-symbol interference (ISI) and thermal jitters, the transition curvatures due to the circular thermal profile cause severe erasures after write and obvious nonlinear distortions of readback signals. This deteriorates the recording performance severely. Especially the degrees of transition curvatures for the low temperature written track (LT) and high temperature written track (HT) are distinct, which makes the correction of transition curvature with only the writer design impossible. Correspondingly, a comprehensive method consisting of writer design and multitrack detection algorithm with joint learning-based neural network (JLNN) is proposed to mitigate the effects of transition curvature and 2-D ISI for both LT and HT of HIMR. First, a designed writer with splitting main poles produces the spatially nonuniform write field along the crosstrack direction to correct the transition curvature of LT. Then the multitrack detection with JLNN and improved Bahl–Cocke–Jelinek–Raviv (BCJR) detector (JLNN-IB) algorithm is studied to further mitigate the effects of residual transition curvatures, thermal jitters, and 2-D ISI for both HT and LT. Specifically, the readback signals of read head array and decoded log-likelihood ratio (LLR) outputted by the low-density parity check (LDPC) decoder are fed into JLNN to obtain the equalized signal and <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$a$ </tex-math></inline-formula> <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">priori</i> probability (AP) of three tracks. Then the equalized signal as well as AP of current track and corresponding soft bit estimations of adjacent tracks are embedded into the branch metrics of improved BCJR detector for data detection, and the LDPC decoder is cascaded for the error correction. The simulation indicates that at the recording density of 2.11 Tb/in <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> , the proposed comprehensive writer design and JLNN-IB algorithm provide 9.2 and 9.7 dB signal to noise ratio (SNR) gains compared to the conventional 2-D neural network equalizer and 2-D linear equalizer under the uniform write field and circular thermal profile, respectively.