We report the first direct observation of oxygen-isotope ((16)O/(18)O) effect on in-plane penetration depth lambda(ab) in a nearly optimally doped YBa(2)Cu(3)O(7-delta) film using novel low-energy muon-spin rotation technique. Spin-polarized muons are implanted at known z beneath surface and process local magnetic field B(z). This feature allows us to measure directly profile B(z) inside superconducting Meissner state make straightforward determination lambda(ab). A substantial isotope shift...

Birth weight serves as a fundamental indicator of neonatal health, closely linked to both early medical interventions and long-term developmental risks. Traditional predictive models, often constrained by limited feature selection incomplete datasets, struggle achieve overlooking complex maternal fetal interactions in diverse clinical settings. This research explores machine learning address these limitations, utilizing structured methodology that integrates advanced imputation strategies,...

From room-temperature measurements of proton spin-lattice relaxation rate in (${\mathrm{C}{\mathrm{H}}_{3})}_{4}$NMn${\mathrm{Cl}}_{3}$ (TMMC) and CsMn${\mathrm{Cl}}_{3}$ \ifmmode\cdot\else\textperiodcentered\fi{} 2${\mathrm{H}}_{2}$O (CMC) as a function magnetic field $\stackrel{\ensuremath{\rightarrow}}{\mathrm{H}}$ the shape low-frequency spectral density spin fluctuations is directly obtained. For parallel to chain axis contains diffusive term which diverges...

The challenge of missing data remains a significant obstacle across various scientific domains, necessitating the development advanced imputation techniques that can effectively address complex missingness patterns. This study introduces Precision Adaptive Imputation Network (PAIN), novel algorithm designed to enhance reconstruction by dynamically adapting diverse types, distributions, and mechanisms. PAIN employs tri-step process integrates statistical methods, random forests, autoencoders,...

This project aims to develop a ChatGPT-like system in Python using natural language processing (NLP) and deep learning techniques. It involves selecting transformer-based model (such as GPT-2, GPT-3, or an open-source alternative), implementing backend with Flask FastAPI, integrating user-friendly chat interface. The will be optimized for contextual understanding, interactive responses, efficient deployment on cloud local platforms. final chatbot serve intelligent conversational agent,...

We present results of $^{17}\mathrm{O}$ and $^{63,65}\mathrm{Cu}$ nuclear magnetic resonance (NMR) quadrupolar (NQR) studies in the normal superconducting state 82-K superconductor ${\mathrm{YBa}}_{2}$${\mathrm{Cu}}_{4}$${\mathrm{O}}_{8}$. The various components Cu O Knight-shift tensors show strong but similar temperature dependences over range from 8.5 to 300 K both ${\mathrm{CuO}}_{2}$ planes chains, supporting picture that there is only one spin component although with different...

A comprehensive experimental and theoretical NMR study of two diffusion processes in ${\mathrm{Li}}_{3}$N is presented: interlayer parallel to the hexagonal axis involving both Li sites intralayer within ${\mathrm{Li}}_{2}$N layers only. The first process allows a quantitative consistent analysis following observables: (i) second-order quadrupolar shift $^{7}\mathrm{Li}$ central signal its strong temperature dependence between 400 600 K, (ii) (above 420 K) extreme angle $^{6}\mathrm{Li}$...

Zeeman perturbed nuclear quadrupole resonance was applied to evaluate weak magnetic fields in the context of orbital currents cuprate superconductors. The environment barium atom c-axis oriented powder samples YBa(2)Cu(4)O(8) investigated pseudogap phase at 90 K. No evidence for found: any static and dynamic field must be less than 0.07 0.7 mT, respectively.

We discuss the multi-exponential nuclear magnetization recovery which occurs in spin-lattice relaxation when NMR lines are split by quadrupole interaction. treat general situation both magnetic and quadrupolar fluctuations present consider three cases differing their initial conditions: (1) a short radio-frequency pulse is applied selectively to one of transitions; (2) all saturated at once; (3) selected line continuous waves or means long comb pulses. Exact solutions presented for spin I =...

We performed high accuracy ${}^{63}\mathrm{Cu}$ NQR spin-lattice relaxation and SQUID magnetization measurements on ${}^{16}\mathrm{O}$ ${}^{18}\mathrm{O}$ exchanged ${\mathrm{YBa}}_{2}{\mathrm{Cu}}_{4}{\mathrm{O}}_{8}$ to determine the isotope shift of temperature opening spin gap, ${T}^{*}$, superconducting transition temperature, ${T}_{c}$. The corresponding exponents are ${\ensuremath{\alpha}}_{{T}^{*}}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}0.061(8)$...

We report measurements of the Gaussian contribution ${\mathit{T}}_{2\mathit{G}}$ to plane $^{63}\mathrm{Cu}$ nuclear spin-spin relaxation time in ${\mathrm{YBa}}_{2}$${\mathrm{Cu}}_{3}$${\mathrm{O}}_{7}$ and ${\mathrm{YBa}}_{2}$${\mathrm{Cu}}_{4}$${\mathrm{O}}_{8}$ blocks normal superconducting ${\mathrm{Y}}_{2}$${\mathrm{Ba}}_{4}$${\mathrm{Cu}}_{7}$${\mathrm{O}}_{15}$. The data confirm our previous results that adjacent ${\mathrm{CuO}}_{2}$ planes have different doping levels these are...

The temperature dependence of the spin susceptibility in ${\mathrm{YBa}}_{2}{\mathrm{Cu}}_{4}{\mathrm{O}}_{8}$ has been calculated on assumption that a pseudogap normal state opens due to charge-density-wave (CDW) instability. agreement with experiment is very good. doping forming discussed. model also predicts an isotope effect CDW and peculiar features Fermi surface.

We report an observation of the $^{63,65}\mathrm{Cu}$ nuclear quadrupole resonance (NQR) and magnetic (NMR) in ${\mathrm{Y}}_{2}$${\mathrm{Ba}}_{4}$${\mathrm{Cu}}_{7}$${\mathrm{O}}_{15}$. have measured temperature dependence Cu NQR frequency spin-lattice relaxation at all four chemically inequivalent sites, shift two plane sites (for field parallel perpendicular to c axis). The ${\mathrm{Y}}_{2}$${\mathrm{Ba}}_{4}$${\mathrm{Cu}}_{7}$${\mathrm{O}}_{15}$ compound turns out be a structure...

The authors have measured the pressure dependence of Knight shift and linewidth nuclear magnetic resonance (NMR) signals 7Li (up to 8 GPa) 23Na 6 in metallic lithium sodium, respectively, at room temperature using a diamond anvil cell (DAC). It is concluded that diffusion hindered by pressure; coefficients activation volumes are estimated. In Li, increases BCC-FCC phase transition. Li with rising up transition, where marked reduction observed which might be due drastic decrease s character...

The anisotropic diffusion coefficient of $^{7}\mathrm{Li}$ in ${\mathrm{Li}}_{3}$N has been measured by the pulsed magnetic-field-gradient method NMR. Activation energy and jump rates obtained for along hexagonal $c$ axis are good agreement with our previous data, thus suggesting that hopping Li ions between inequivalent Li(1) Li(2) sites dominates conductivity axis.

We have performed NMR measurements at the Y site on a $c$-axis-oriented powder sample of cuprate superconductor ${\mathrm{Y}}_{2}{\mathrm{Ba}}_{4}{\mathrm{Cu}}_{7}{\mathrm{O}}_{15\ensuremath{-}\ensuremath{\delta}}$ to search for possible orbital-current phase. The temperature dependence linewidth and relaxation behavior in normal-conducting phase were studied down 100 K. These give upper limits static magnetic field amplitude fluctuating $\ensuremath{\lesssim}0.15$...

By performing nuclear magnetic resonance (NMR) and quadrupole (NQR), respectively, with Cu, O, Y isotopes in the normal state of high-temperature superconductor ${\mathrm{YBa}}_{2}{\mathrm{Cu}}_{4}{\mathrm{O}}_{8}$, we have found following major results: (i) The Y, O shift data support, for planes chains, validity ``single-spin fluid model.'' (ii) Around ${T}^{\ifmmode\dagger\else\textdagger\fi{}}=180$ K, ``anomalies'' temperature behavior several NMR/NQR quantities been detected. (iii)...