Articles

Einstein’s special and general relativity revolutionized physics. The predictions of general relativity are Strong Lensing, Weak Lensing, Microlensing, Black Holes, Relativistic Jets, A Gravitational Vortex, Gravitational Waves, The Sun Delaying Radio Signals, Proof from Orbiting Earth, Expansion of the universe. The density of the universe determines the geometry and fate of the universe. According to Freedman’s equations of general relativity published in 1922 and 1924, the geometry of the universe may be closed, open and flat. It all depends upon the curvature of the universe also. Various results of Cosmic Microwave Background Radiation (CMBR), NASA’s Wilkinson Microwave Anisotropy Probe (WMAP), and ESA’s Planck spacecraft probes found that our universe is flat within a margin of 0.4% error. In this short work, by applying the laws of quadratic equations, we attempt to show that OUR UNIVERSE IS FLAT.

In the research of steam turbine rotor, start-up optimization is a very key research problem. A series of start-up optimization research can greatly improve the start-up efficiency of steam turbine and the safety performance of the unit. The start-up optimization of steam turbine is inseparable from the analysis of the start-up process of steam turbine and the mathematical model of the startup process of steam turbine unit, because the optimization of steam turbine unit can be regarded as a function to find the optimal solution. This paper analyzes the start-up process of 300 MW steam turbine, analyzes the start-up process of steam turbine unit through the data used in the actual power plant, and gives the mathematical model of cold start-up of steam turbine according to the start-up process of steam turbine, so as to further study the start-up optimization of steam turbine. Finally, the optimization model is determined by several key parameters, which are three weight coefficients α1,α2,α3, the actual damage value Di and damage limit value Dlim, and the start-up time ti and total start-up time t0 of each stage.

Objective: In primary care, during treatments, nurses may need to wear surgical masks, namely for control of infection contamination, or to minimize unpleasant odors. The goal of this study is to inspect the effect of nurses wearing the mask on patient perception of the nurse-patient relation. Methods: A pre-post-test, control-experimental group design was employed with 60 patients treated in family health units. Patients responded to the Patient Satisfaction Questionnaire III (PSQ-III) regarding nurses’ communication, interpersonal manner, technical quality, as well regarding general satisfaction with the encounter. An additional question asked both patients and nurses how long they felt that the visit lasted. Results: Results show that nurses wearing the surgical mask had significantly negative effects in all dimensions of PSQ-III and increased the perceived visit duration among both nurses and patients. Conclusion: When a previous relationship exists, nurses wearing the surgical mask in primary care in Portugal negatively affects patient satisfaction with both the patient-nurse relation and the nurses’ technical quality. Practice implications: Is important the nurse understand this impact to discuss with the colleagues the best strategy to minimize the negative impact to the patient- family nurse relation and manager this situation in the best way to the patient. 

Plasma stability is the biggest challenge facing the nuclear fusion industry. One of the best methods of stability study is magnetohydrodynamic (MHD) equations, which has two linear and nonlinear states. Usually linear stability analysis is used to describe the MHD state, which is obtained by linearizing nonlinear equations. The reactor under study is the W7-X reactor, which is an optimal example of a stellaratoric system. The question raised in this research is how to create suitable conditions for the formation of plasma and heat transfer produced by the melting reaction. Many efforts have been made in this direction, but still the record holder for plasma state maintenance belongs to the international ITER project and around 1000. However, IPP researchers at the Max Planck Institute in Germany (maker of the W7-X reactor) predicted that by 2020 they would produce a pulse of 30 minutes. The numerical method is used to investigate the stability of the reactor. In this paper, boundary conditions were expressed in terms of resistance wall. With the help of the mathematical Matlab software, magnetic field values ​​were obtained from experimental reports extracted from the Max Planck Institute for various values ​​of β. From the values ​​obtained, it was concluded that the appropriate field value is β = 5 according to the ideal MagnetoHydroDynamic state and the interval defined by the Max Planck Institute.

COVID-19 created a public health crisis shutting down many normal day-to-day activities and adversely affecting life, as we know it. Not only did this affect vulnerable, senior populations and people with poorly managed diabetes and hypertension [1-4], it displaced nursing students from clinical experiences putting them at risk of not graduating. Given the projected shortages of RNs in 2030, in California alone of 44,500 FTEs [5], this delay would have added a ripple effect increasing already dire predictions. This displacement created an emergency and with the aid of the Board of Registered Nursing, Assembly Bill 2288 [6] passed allowing student nurse clinical experience requirements to be revised to help meet graduation requirements.

Dear reader, isn’t it time to turn things around and allow TIME to take its rightful place? In a nutshell, I believe Time should be considered as the primary energy that has created the whole material world and governs the continuous changes in it. In my article “An Intelligent Cosmos: Philosophy of Science”, I discuss that this primary creative energy is, more generally, the Dark Energy in our Universe. I believe that Dark Energy probably has a variety of specific manifestations, and I assume that one of those manifestations is Time. This article is a continuation of my article “An Intelligent Cosmos: Philosophy of Science” 

In this work the statistical and squeezing properties of light-driven by sub-harmonic generation with two-mode coherent light are studied. With interaction Hamiltonian of both two-mode coherent and sub harmonic generation, we have driven master equation of system under consideration. From the master equation, the solution of the C-number Langevin equation is derived. It helps us to solve quadrature variance, quadrature squeezing, mean, and variance of photon number for light produced by sub-harmonic generation with the two-mode coherent light state. And the result shows that; the squeezing occurs in plus quadrature with the maximum squeezing of 87%. The photon statistics of the system under consideration is subpoissonian in which both mean & variance are increasing as kappa increase.

Background: Respiratory muscle strength can be reduced in patients diagnosed with stroke, which reasonably justifies the use of respiratory muscle training in this population. This study determines the comparative efficacy of inspiratory, expiratory, and combined respiratory muscle training on the pulmonary functions and chest expansion in acute stroke survivors. Method: Forty-five acute stroke survivors (15 in each group) completed all protocols of the study. Participants were randomly assigned to any one of three groups. In addition to the conventional exercise therapy, participants received any one of the three respiratory muscle training protocols (inspiratory muscle training, expiratory muscle training or combined respiratory muscle training). Chest expansion was assessed using tape measure and pulmonary function parameters were assessed using a spirometer. Results: Paired t-test analysis showed significant improvements in the chest expansion and the pulmonary function parameters following training in each group. One-way ANOVA showed significant improvements in the pulmonary function parameters across the three groups but not in the chest expansion with p - value = 0.405. Least significant difference (LSD), post-hoc analysis shows that the significant difference for FEV1, FVC and FEV1/FVC lies between inspiratory muscle training group and expiratory muscle training group. Conclusion: When the three training methods were compared, it was found that expiratory muscle training was the most beneficial in improving the pulmonary functions and chest expansion in acute stroke survivors.

We analyze optomechanically induced Transparency and asymmetric Fano-line shape Profile in a two-mode cavity system, coupling at weak and strong coupling regimes. The model system consists of one mechanical mode and two optical modes. The transmission shows nonreciprocal behavior. Both the forward transmission and backward reflection for the system are analyzed for both optic-optic and mechanical-optic cavities by considering various system parameters. The output spectra lead to sharp asymmetric Fano-resonance and tunable transparency. Double line-shape profile is observed in the output Spectrum. Our proposal provides a new platform for application in quantum telecommunications and a photonic device like optical Switches.

Japan enjoys the longest expectation of life at birth among major developed countries, and one possible reason for this is that obesity is rare in Japan. Further, COVID-19 death rate is extremely low in South Korea and Japan compared to the other developed countries, and low obesity rate may be related to this phenomenon.