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2022 ◽  
Shilpa Garai ◽  
N. C. Pati ◽  
G. C. Layek ◽  
Nikhil Pal

Abstract We report the existence of periodic structures in the transitional and chaotic regimes in bi-parameter spaces of a predator-prey system. A model is constructed taking into consideration of two important effects: namely, the prey refuge and fear of predation risk. The fixed points, their existence and stability behaviors are analyzed. The Neimark-Sacker bifurcation in the neighborhood of the interior fixed point is shown selecting refuge strength as a bifurcation parameter. The complex dynamical behaviors are explored in the biparameter space with the help of the largest Lyapunov exponent and isoperiodic diagrams. The period-bubbling transitional patterns, and triple heterogeneous attractors resulting in qualitative unpredictability are identified in the present system. The Wada basin sets for the triple coexisting attractors are found. The study reveals that the oscillations of the populations in certain control parameter regions are highly dependent upon the initial densities of the populations.

2022 ◽  
pp. 19-35

In addition to the problems caused by money being fiat, most modern money is moreover created not by governments but by the privately-owned banking systems as debt to themselves. This is not only grossly contrary to all traditions of natural justice, it is also unconstitutional. This problem has been understood and publicised by many politicians and writers over centuries, but it is still not widely known due to the financial and political power of the perpetrators. Since it is also the main cause of the continuing increase in inequality in all the rich countries, the “great reset” being advocated by those in charge of the present system is clearly not fit to become the new basis of the economic system.

2022 ◽  
Vol 44 (3) ◽  
pp. 255-260
S. K. BINDRA ◽  

The tracking of meteorological balloons using dipole matrix array antenna by sequential lobe switching with the help of a motor driven mechanical UHF phasing switch had been in operational use in our national upper air network from last 25 years. A solid state four-way electronic switch at 400 MHz using high conductance-high speed switching diodes has been designed to replace the aged motor driven mechanical phasing switch. Microstripline technique has been used in designing UHF switch to achieve proper impedance, matching, routing and addition of UHF signals received from the four antenna bays. For sequential switching of antenna array and synchronisation of data reception and display system the intelligence is generated by a compact logic in-built in the phasing switch. Unlike, mechanical switch, the present system has no switching  noise and has low insertion loss (2 dB), thus improving the data acquisition capability of ground reception system. The design of switch is modular, light weight and highly rugged to suit all types of environmental conditions.

2022 ◽  
Vol 17 (01) ◽  
pp. C01011
A. Samalan ◽  
M. Tytgat ◽  
G.A. Alves ◽  
F. Marujo ◽  
F. Torres Da Silva De Araujo ◽  

Abstract During the upcoming High Luminosity phase of the Large Hadron Collider (HL-LHC), the integrated luminosity of the accelerator will increase to 3000 fb−1. The expected experimental conditions in that period in terms of background rates, event pileup, and the probable aging of the current detectors present a challenge for all the existing experiments at the LHC, including the Compact Muon Solenoid (CMS) experiment. To ensure a highly performing muon system for this period, several upgrades of the Resistive Plate Chamber (RPC) system of the CMS are currently being implemented. These include the replacement of the readout system for the present system, and the installation of two new RPC stations with improved chamber and front-end electronics designs. The current overall status of this CMS RPC upgrade project is presented.

Carmen Păunescu ◽  
Katri-Liis Lepik ◽  
Nicholas Spencer

AbstractThe ambition for this book is to demonstrate how higher education institutions (HEIs) can respond to societal challenges, support positive social change and influence the international public discourse on social innovation. It attempts to answer the question, ‘how does the present higher education system, in different countries, promote social innovation and create social change and impact’. In answering this question, the book identifies factors driving success as well as obstacles. The book offers suggestions about how the present system can be improved both based on existing data and international literature on social innovation in higher education. The book presents a selected set of peer reviewed chapters presenting different perspectives against which relevant actors can identify and analyse social innovation in HEIs.

2021 ◽  
Vol 44 (1) ◽  
pp. 93-98
M. K. GUPTA ◽  

A computer bast1d data acquisition system has been designed for the calibration of pressure sensors used in MK III Indian radiosondes. The system can calibrate 64 baroswitchesin one cycle and gives a tabular printout of pressure values at various contact numbers. This replaces the analog type of recording system, which was in use for the last few decades. The present system gives better accuracy and resolution and avoids human judgement and errors.

2021 ◽  
Christopher Ifeanyi Ibenegbu

Abstract The study examined evidence of gender equity in pupils achievement in phonics, when exposed to adult and children-generated illustrations in Njikoka Local Government Area of Nigeria. The study employed a non-equivalent quasi‐experimental 2 x 2 factorial research design. Some 158 primary two pupils from 4 schools were used for the study. The English Achievement Test (EAT) was used to collect data. Three hypotheses were tested. The data were analysed using descriptive statistics and Analysis of Covariance (ANCOVA). The results showed that there was a significant main effect for the mode of illustration on pupils’ achievement in phonics F(1,153) = 21.315, p=.000; there was no significant main effect of gender F(1,153) = 1.082, p =.300, and there was no significant interaction effect of mode of illustration and gender F(1,153) = .701, p =.404. The study recommended that since the children-generated illustrations were more effective in teaching phonics and enhancing pupils achievement in phonics, the Ministries of Education should ensure that textbook authors incorporate children-generated illustrations in the instructional materials for pupils in primary schools. Mode of illustration had no differential effects on male and female pupils achievement in phonics. As such the present system of teaching both males and females in the same class should be encouraged. Authors and publishers of children’s books should engage pupils’ in illustrating their books.

Membranes ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 991
Francisco J. Alguacil ◽  
Félix A. Lopez

In this paper, the transport of iron(III) from iron(III)-manganese(II)-hydrochloric acid mixed solutions, coming from the treatment of spent alkaline batteries through a flat-sheet supported liquid membrane, is investigated (the carrier phase being of Cyanex 923 (commercially available phosphine oxide extractant) dissolved in Solvesso 100 (commercially available diluent)). Iron(III) transport is studied as a function of hydrodynamic conditions, the concentration of manganese and HCl in the feed phase, and the carrier concentration in the membrane phase. A transport model is derived that describes the transport mechanism, consisting of diffusion through a feed aqueous diffusion layer, a fast interfacial chemical reaction, and diffusion of the iron(III) species-Cyanex 923 complex across the membrane phase. The membrane diffusional resistance (Δm) and feed diffusional resistance (Δf) are calculated from the model, and their values are 145 s/cm and 361 s/cm, respectively. It is apparent that the transport of iron(III) is mainly controlled by diffusion through the aqueous feed boundary layer, this being the thickness of this layer calculated as 2.9 × 10−3 cm. Since manganese(II) is not transported through the membrane phase, the present system allows the purification of these manganese-bearing solutions.

Sensors ◽  
2021 ◽  
Vol 21 (24) ◽  
pp. 8458
Paweł Jabłoński ◽  
Joanna Iwaniec ◽  
Michał Jabłoński

ADAS and autonomous technologies in vehicles become more and more complex, which increases development time and expenses. This paper presents a new real-time ADAS multisensory validation system, which can speed up the development and implementation processes while lowering its cost. The proposed test system integrates a high-quality 3D CARLA simulator with a real-time-based automation platform. We present system experimental verifications on several types of sensors and testing system architectures. The first, open-loop experiment explains the real-time capabilities of the system based on the Mobileye 6 camera sensor detections. The second experiment runs a real-time closed-loop test of a lane-keeping algorithm (LKA) based on the Mobileye 6 line detection. The last experiment presents a simulation of Velodyne VLP-16 lidar, which runs a free space detection algorithm. Simulated lidar output is compared with the real lidar performance. We show that the platform generates reproducible results and allows closed-loop operation which, combined with a real-time collection of event information, promises good scalability toward complex ADAS or autonomous functionalities testing.

2021 ◽  
George Spencer Simpson

The following thesis is an account of, and an evaluation of, an experiment designed to test the effect of the employment of a system of handicaps, according to the ascertained scholastic attainment of the pupils. By the employment of this system it was hoped that a premium would be placed upon effort rather than on natural endowment.

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