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2025
The Fleischmann-Pons experiments have remained a contentious field since their inception in 1989, hampered by inconsistent reproducibility and a lack of theoretical consensus. This article presents two innovations in order to improve the reproducibility and irrefutability of these reactions. The first improvement consists in the controlled application of beta emitters in order to decrease the long induction period of cold fusion reactions and the following use of beta particle absorbers to regulate the electron replicability factor to avoid the runaway of these nuclear reactions. This idea comes from the suggestion of Edward Teller and his electron catalysis that creates in the system Pd/D unknown neutral particles (i.e. dineutrons, trineutrons and tetraneutrons). The second improvement consists in the application of elements with high neutron capture cross sections. This idea was already experimentally realized by Miles and Imam who studied the system Pd/D/Boron where the reproducibility was increased to about 90% and higher excess heat was observed. There are known some other elements with higher neutron capture cross sections that could improve the reproducibility and irrefutability of these reactions. E.g., gadolinium in the system Pd/D/Gd might significantly modify the result of these reactions. Many parallel nuclear reactions proceed in this system, and therefore, the total electron replicability factor has to be controlled during all these processes.- Book : 7(2)
- Pub. Date : 2025
- Page : pp.40-48
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2025
After decades of experimental efforts, the DAMA/LIBRA(DL) annual modulation (AM) analysis on the χN (WIMP dark matter interactions on nucleus) channel remains the only one which can be interpreted as positive signatures. This has been refuted by numerous time-integrated (TI) and AM analysis. It has been shown that χe (WIMP interactions with electrons) alone is not compatible with the DL AM data. We expand the investigations by performing an AM analysis with the addition of χe long-range and short-range interactions to χN, derived using the frozen core approximation method. Two scenarios are considered, where the χN and χe processes are due to a single χ (Γtot1χ) or two different χ’s (Γtot2χ). The combined fits with χN and χe provide stronger significance to the DL AM data which are compatible with the presence of additional physical effects beyond χN alone. This is the first analysis which explores how χe AM can play a role in DL AM. The revised allowed regions as well as the exclusion contours from the other null AM experiments are presented. All DL AM allowed parameter spaces in χN and χe channels under both Γtot1χ and Γtot2χ are excluded at the 90% confidence level by the combined null AM results. It can be projected that DL-allowed parameter spaces from generic models with interactions induced by two-WIMPs are ruled out.
Published by the American Physical Society
2025
- Book : 111(8)
- Pub. Date : 2025
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2025
A sound power spectrum analysis has been conducted on a T-7A-installed F404 engine, for operating conditions spanning intermediate thrust to afterburner. From free-field pressure spectra at microphone arc arrays with radii of 38 and 76 m, sound power level spectra are calculated from surface integrals and assumed axisymmetric radiation. The spectral peak-frequency region, from ∼100–500 Hz, broadens with increasing engine conditions. When the power level spectra are plotted with Strouhal number, the spectral peak decreases with engine condition. Comparing this decrease with rocket data suggests that military jet noise radiation is becoming more rocket-like, especially at afterburner conditions.- Book : 5(4)
- Pub. Date : 2025
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2025
Abstract
This study reports preliminary micrometeorological observations in suburban Tangerang, Banten, Indonesia, a rapidly urbanizing area influenced by Jakarta’s expansion. Monitoring micrometeorological conditions is essential to understand the impacts of rapid landscape changes in such transitional zones. Observations were conducted on the rooftop of the STMKG building, 43 m above ground, using an ultrasonic anemometer, global radiation sensor, downward longwave radiation sensor, and an ambient temperature-humidity sensor. Data were logged at a high frequency of 10 Hz over an 8-day period (20–28 March 2024), and mean values were calculated every 30 minutes. Turbulent fluxes were analysed using the eddy covariance method. Results indicate that wind patterns are predominantly influenced by sea and land breezes, with generally low drag coefficients except in the northeast sector. Heat fluxes align with changes in observed radiation, and turbulence statistics confirm the suitability of the site for micrometeorological monitoring in suburban Tangerang. These findings highlight the complex interactions between local meteorological conditions and urban development, offering insight into energy flux dynamics and aerodynamic properties in the area. The research provides a baseline for future studies and continuous observation to better understand the evolving micrometeorological conditions in Tangerang’s suburban environment.- Book : 1472(1)
- Pub. Date : 2025
- Page : pp.012010-012010
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2025
- Book : 46(4)
- Pub. Date : 2025
- Page : pp.425-428
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2025
In this article, for the first time in the extreme conditions of Uzbekistan, in order to reduce farm costs from born male lambs, data on the use of low-frequency laser radiation as one of the biophysical methods is presented and summarized, which, as studies have shown, ensures the normal course of physiological processes in the body of male lambs that fall into a state of stress after separation from their mothers and the cessation of breastfeeding. The work presents reliable data on the positive effect of this method, which also improved the quality indicators of the resulting livestock products.- Book : 173()
- Pub. Date : 2025
- Page : pp.02004-02004
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2025
- Book : ()
- Pub. Date : 2025
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2025
AbstractPerovskite semiconductor cesium lead bromide (CsPbBr3) has demonstrated great promise as a new‐generation gamma‐ray detector. However, substantial challenges still present in reproducibly achieving optimal spectroscopic performance. The specific strategy for producing spectroscopic‐grade CsPbBr3 crystals with high reproducibility and uniformity are still not clarified. Herein, efficient zone refining processing is developed for CsPbBr3 crystals that facilitates impurity segregation to achieve an ultrahigh purity level of ≈1.42 ppm, therefore lowers trap density and balances charge transport. In a typical 30 mm diameter zone‐refined CsPbBr3 ingot, all wafers exhibited remarkable energy resolutions of 6–12% and 3–8% for 241Am and 57Co γ‐rays under comparable electric fields. The crystals also exhibited an ambipolar charge transport characteristic, resemble to elemental semiconductors, with equivalent hole and electron mobility‐lifetime products averaging 5.42 × 10−3 and 2.27 × 10−3 cm2∙V−1, respectively. Consequently, over 95% of wafers achieved energy resolutions below 5% whereas 70% exceeded 3% for 137Cs γ‐rays, demonstrating exceptional reproducibility and uniformity. Notably, a champion energy resolution of 1.3% with an outstanding photopeak‐to‐Compton (P/C) ratio of ≈5.3 is attained in an ambipolar planar detector. It is anticipated that this work shall expedite scalable manufacturing and practical applications of CsPbBr3 detectors.- Book : ()
- Pub. Date : 2025
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2025
- Book : ()
- Pub. Date : 2025
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2025
- Book : ()
- Pub. Date : 2025
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