Miracle-dz/UniFAR-FTUs huggingface dataset:
Exact dynamics and squeezing in two harmonic modes coupled through angular momentum

We investigate the exact dynamics of a system of two independent harmonic oscillators coupled through their angular momentum. The exact analytic solution of the equations of motion for the field operators is derived, and the conditions for dynamical stability are obtained. As for the application, we examine the emergence of squeezing and mode entanglement for an arbitrary separable coherent initial state. It is shown that close to instability, the system develops considerable entanglement, which is accompanied with simultaneous squeezing in the coordinate of one oscillator and the momentum of the other oscillator. In contrast, for weak coupling away from instability, the generated entanglement is small, with weak alternating squeezing in the coordinate and momentum of each oscillator. Approximate expressions describing these regimes are also provided.
Does High Pressure Really Preserve Pineapple Juice Sensory Attributes

Pineapple is a well appreciated fruit worldwide due to its distinct sensory characteristics. Brazil is the fourth world pineapple producer, presenting a seven fold increase in the pineapple juice exportation in the last five years. Consumers are looking for products with nutritional and sensory characteristics similar to the fresh ones, as well as microbiological safety. High Hydrostatic Pressure (HHP) is an innovative technology capable of inactivating pathogenic and deteriorating microorganisms, while minimizing loss of sensory and nutritional product quality. The objective of this study was to characterize, by Quantitative Descriptive Analysis (QDA), pineapple juices obtained from the pressurized pineapple purée (HHP), the in natura purée, and four different commercial products available in the Brazilian market. Eleven selected and trained assessors evaluated the samples following the QDA procedures. The data were analyzed using ANOVA and PCA. The QDA elicited 17 attributes as follows: three for appearance; six for aroma; six for flavor and two for consistency. QDA revealed high similarity between the pineapple juice sensory attributes obtained from the in natura and the pressurized purées, both differing (p<0,05) in many attributes from the commercial pineapple juices evaluated in this study. The main sensory attributes which characterized the pressurized and in natura juices were: characteristic pineapple juice color, natural pineapple juice aroma; natural pineapple juice flavor; consistency, fiber presence (visually perceived), and fiber presence (perceived in the mouth). These results suggest that HHP may be successfully used to preserve pineapple puree, yielding an improved sensory quality juice, compared to those commercially available.
ZXIC Speaker Verification System for FFSVC 2022 Challenge

This paper presents the development of ZXIC speaker verification system submitted to the task 1 of Interspeech 2022 Far-Field Speaker Verification Challenge (FFSVC2022). Deep neural network based discriminative embeddings, such as x-vectors, have been shown to perform well in speaker verification tasks. In far-field speaker verification system, mismatch between training and testing data and mismatch between enrollment and authentication utterances impact the system performance a lot. To alleviate this mismatch and improve the system performance, in this paper we propose a novel multi-reader domain adaption learning framework based on asymmetric metric learning. In this challenge, we also explore advanced neural network based embedding extractor structures including ECAPA-TDNN and ResNet-SE. A number of experiments on these architectures show that our proposed method is effective and improves the systems performance a lot. The final submitted systems are the fusion of several models. In FFSVC2022, our best system achieves a minimum of the detection cost function (minDCF) of 0.511and an equal error rate (EER) of 4.409 % on the evaluation set.
Experimental characterization of railgun-driven supersonic plasma jets motivated by high energy density physics applications

We report experimental results on the parameters, structure, and evolution of high-Mach-number (M) argon plasma jets formed and launched by a pulsed-power-driven railgun. The nominal initial average jet parameters in the data set analyzed are density ≈2×1016 cm−3, electron temperature ≈1.4 eV, velocity ≈30 km/s, M≈14, ionization fraction ≈0.96, diameter ≈5 cm, and length ≈20 cm. These values approach the range needed by the Plasma Liner Experiment, which is designed to use merging plasma jets to form imploding spherical plasma liners that can reach peak pressures of 0.1–1 Mbar at stagnation. As these jets propagate a distance of approximately 40 cm, the average density drops by one order of magnitude, which is at the very low end of the 8–160 times drop predicted by ideal hydrodynamic theory of a constant-M jet.
Use parent concrete strength and equivalent water absorption of recycled concrete aggregates to identify concrete properties

Abstract This article focuses to study some properties of recycled aggregate concretes (RAC) according to the equivalent water absorption of aggregates and the parent concrete strength of RCA and thus new relationships were deduced. The results indicated that 1% increase of the equivalent water absorption induced 0.12% increase in superplasticiser dosages. The hyperbolic model seems to be more adequate to estimate compressive strength and shrinkage of RAC when the parent concrete strength and the equivalent water absorption were introduced. According to the obtained results, the parent concrete strength of RCA must not be less than 10 MPa than that of the reference concrete to avoid the drop in compressive strength. For high equivalent water absorption, the ultimate shrinkage became higher and slower.
Experiment on Gas–Liquid Sulfur Relative Permeability under High-Temperature High-Pressure Sour Gas Reservoir Condition

In the development of high temperature sour gas reservoirs, gas–liquid sulfur two phase percolations exist, which have a significant impact on the gas permeability and gas well productivity. There are currently few reports on experimental studies on gas–liquid sulfur relative permeability. This study improves the experimental equipment and process, and it proposes an experimental method for measuring the gas–liquid sulfur relative permeability curve. Several typical core samples from a sour gas reservoir in Sichuan Basin, China were selected for experimental study, and the gas–liquid sulfur relative permeability under high temperature and high pressure (HTHP) was measured. The results show that, first, the critical flowing saturation of liquid sulfur was 40%, and the gas–liquid sulfur co-flow zone was narrow. With the increase in the liquid sulfur saturation, the gas relative permeability decreased rapidly. Second, the better the physical properties of the core, the greater the damage of liquid sulfur to the core properties. The residual liquid sulfur saturation of the fractured core was higher than matrix core, and as liquid sulfur saturation increased, so did the damage to gas permeability. Third, temperature had an effect on the gas–liquid sulfur relative permeability. Gas relative permeability decreased as the temperature rose, while the liquid sulfur relative permeability remained essentially constant. Fourth, the rock effective stress had a significant impact on the gas–liquid sulfur relative permeability. The relative permeability of gas and liquid sulfur decreased as the effective stress increased, and the fractured core was more sensitive to stress.
Review: W. V. Quine, The Problem of Simplifying Truth Functions

"any constructively given part of the language is consistent. " However, if such a language were adequate for ordinary mathematical discourse, the argument of Kleene's VIII 32 could be carried out within the language, from which it would follow at once that the consistency of the language is not provable within the language. On page 201, it is asserted that the question of the existence of abstract entities may be sidestepped by identifying such entities with, "for example, certain chemical reactions in men's brains. " However, it quickly becomes apparent that if, say, the number two is to be a single object, an equivalence class of "chemical reactions" is necessary. And, this leads to a vicious circle. Another objection is that while there are infinitely many abstract objects (and if we include real numbers, non-denumerably many), there may well be only a finite (or in any case denumerable) number of distinct physical objects. On page 206, it is stated that many of Post's results were "rediscovered by Mostowski XII I 112. " Actually, Mostowski's results were, for the most part, rediscoveries of the material of Kleene's VIII 32. However, the cited paper of Mostowski does contain the Kleene-Post theorem to the effect that a set of integers is recursive if and only if both the set and its complement are recursively enumerable. On page 208 and elsewhere, it is suggested that it is a consequence of Godel's and Church's theorems that a human brain is inherently superior to a computing machine. The reviewer would suggest that a suitably programmed (and suitably large) computing machine would be perfectly capable of "using a syntax language for reasoning about an object language. " In fact, if it should turn out that the human brain is equivalent in operation to a computing machine, then one can imagine a suitably programmed machine which would, when presented with a complete description of the human brain, produce a proposition A of elementary arithmetic, such that it could prove that, if the human brain were consistent, then A would be true, but not provable by the human brain. The following errata were noted: Page 6, line 3, For "(a)" read "g(a)". Page 41, lines 3 and 4, after "b" place "h" . Page 44, line 13, for " T 9 " " read "T13". Page 44, last line, for "lemma 6" read "Theorem 6, page 22". Page 145, line 8, for "~p is provable in L3" read "~{p is provable in L3)". Page 168, last line, for "/(a) = g{a)" read "fa = g(a)". The publishers state that the book was published in March 1951, though the title page carries the date 1950. MARTIN DAVIS
A generalization of Laguerre polynomials

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High-Resolution X-Ray Spectra of the Brightest OB Stars in the Cygnus OB2 Association

The Cyg OB2 association contains some of the most luminous OB stars in our Galaxy, the brightest of which are also among the most luminous in X-rays. We obtained a Chandra High Energy Transmission Grating Spectrometer observation centered on Cyg OB2 No. 8A, the most luminous X-ray source in the association. Although our analysis focuses on the X-ray properties of Cyg OB2 No. 8A, we also present limited analyses of three other OB stars (Cyg OB2 Nos. 5, 9, and 12). Applying standard diagnostic techniques as used in previous studies of early-type stars, we find that the X-ray properties of Cyg OB2 No. 8A are very similar to those of other OB stars that have been observed using high-resolution X-ray spectroscopy. From analyses of the He-like ion fir emission lines (Mg XI, Si XIII, S XV, and Ar XVII), we derive radial distances of the He-like line emission sources and find that the higher energy ions have their lines form closer to the stellar surface than those of lower ion states. These fir-inferred radii are also found to be consistent with their corresponding X-ray continuum optical depth unity radii. Both of these findings are in agreement with previous O star studies and again suggest that anomalously strong shocks or high-temperature zones may be present near the base of the wind. The observed X-ray emission-line widths (HWHM ~ 1000 km s-1) are also compatible with the observations of other O star supergiants. Since Cyg OB2 No. 8A is similar in spectral type to ζ Pup (the only O star that clearly shows asymmetric X-ray emission-line profiles with large blueshifts), we expected to see similar emission-line characteristics. Contrary to other O star results, the emission lines of Cyg OB2 No. 8A show a large range in line centroid shifts (~-800 to +250 km s-1). However, we argue that most of the largest shifts may be unreliable and the resulting range in shifts is much less than those observed in ζ Pup. Although there is one exception, the H-like Mg XII line, which shows a blueshift of -550 km s-1, there are problems associated with trying to understand the nature of this isolated large blueshifted line. To address the degree of asymmetry in these line profiles, we present Gaussian best-fit line profile model spectra from ζ Pup to illustrate the expected asymmetry signature in the χ2 residuals. Comparisons of the Cyg OB2 No. 8A best-fit line profile residuals with those of ζ Pup suggest that there are no indications of any statistical significant asymmetries in these line profiles. Both the line shift characteristics and lack of line asymmetries are very puzzling results. Given the very high mass-loss rate of Cyg OB2 No. 8A (approximately 5 times larger than previous Chandra-observed O supergiants), the emission lines from this star should display a significant level of line asymmetry and blueshifts as compared to other OB stars. We also discuss the implications of our results in light of the fact that Cyg OB2 No. 8A is a member of a rather tight stellar cluster, and shocks could arise at interfaces with the winds of these other stars.
Parameter approximations for quantile regressions with measurement error

The impact of covariate measurement error on quantile regression functions is investigated using a small variance approximation. The approximation shows how the error contaminated and error free quantile regression functions are related, a key factor being the distribution of the error free covariate. Exact calculations probe the accuracy of the approximation. The order of the approxiamtion error is unchanged if the error free covariate density is replaced by the error contaminated density. It is then possible to use the approximation to investigate the sensitivity of estimates to varying amounts of measurement error.
Valuing nature-based recreation in forest areas in Italy: An application of Travel Cost Method (TCM)

Abstract Nature-based recreation provides benefits facilitating social interactions and cohesion, creating job opportunities, and stimulating the local economy. The aim of this study was to assess the recreational economic value of different forest areas considering two aspects: stand features and proximity of the forest to urban areas. An individual Travel Cost Method (TCM) was applied in three study areas in Italy involving 603 visitors in the survey. The results show that in all three case studies the most important forest-based recreational activity carried out by visitors is hiking, followed by picnicking and mountain biking. The TCM estimates a consumer surplus between €7.33 and €17.37 per visit. The key points highlighted by the study are that: managed natural forests have a higher recreational economic value than unmanaged artificial forests; the peri-urban forests are characterized by a higher number of visitors but a lower value per visit than mountain forests.
FOUCAULT E SUAS CONTRIBUIÇÕES PARA A EDUCAÇÃO ATUAL E O DEBATE SOBRE POLÍTICAS PÚBLICAS

A proposta deste artigo é estabelecer uma relação e situar as conexões entre as ideias de Foucault e as demandas da educação atual. Além disso, busca-se aproximar algumas visões foucaultianas com alguns tipos de Políticas Públicas em Educação que atualmente usam estratégias de controle conforme o filósofo apresenta em algumas de suas obras. Resumidamente objetiva-se fazer uma análise de políticas públicas por meio de contribuições das reflexões do próprio Foucault. Teoricamente, o estudo está pautado nas contribuições de autores como Caciano e Silva (2012), Paniago (2005), Santos (2016), Smarjassi e Arzani (2021), Secchi (2014), Foucault (1999, 2008), entre outros. Metodologicamente, optou-se pela pesquisa bibliográfica e pela abordagem qualitativa e quanto aos objetivos classifica-se como descritiva. Os resultados indicam que há uma relação entre as contribuições de Foucault para a educação atual sobre diversos aspectos. O poder exercido dentro das instituições (como a escola) para disciplinar a sociedade, pode ser compreendido por meio da lógica panóptica, segundo a qual a força que o poder disciplinar exerce tem ligação com os sistemas de controle na contemporaneidade e com os sistemas descritos por Foucault.
Sur les Automorphismes de Groupes Libres et de Groupes de Surface

The special linear groups, the mapping class groups of surfaces, the outer autormorphism groups of free groups appear in numerous domains. Their analogies, developped in particular in K. Vogtmann's work, have been written about a lot. In this report, we concentrate on the contractible spaces on which these groups act in an analogous way, on the common properties of their subgroups, and on the similar (or conjecturally similar) properties of their asymptotic geometry.
Radiative Feedback in Massive Star and Cluster Formation

Understanding the origin of high-mass stars is central to modern astrophysics. We shed light on this problem with simulations using a novel, adaptive-mesh, ray-tracing algorithm. These simulations consistently follow the gravitational collapse of a massive molecular cloud core, the subsequent build-up and fragmentation of the accretion disk surrounding the nascent star, and, for the first time, the interaction between its intense UV radiation field and the infalling material. We show that ionization feedback can neither stop protostellar mass growth nor suppress fragmentation. We discuss the effects of feedback by ionizing and non-ionizing radiation on the evolution of the stellar cluster. The accretion is not limited by radiative feedback but by the formation of low-mass companions in a process we call "fragmentation-induced starvation". This behavior consistently reproduces the observed relation between the most massive star and the total mass of stars in a cluster. We show that magnetic fields reduce the star formation rate and lead to the formation of more massive stars.
Aligning Supply Chain through Inventory Ownership Analysis and Performance of Manufacturing Firms in Kenya

Purpose: The purpose of this study was to establish the influence of roe played by alignment of supply chain through inventory ownership analysis on the performance of manufacturing firms in Kenya. Methodology: Descriptive and cross-sectional research designs were adopted in this study. The population of the large sized registered members as per the directory is 461. This study employed Cochran’s formula to sample 160 large manufacturing firms from the total population. A structured questionnaire was used to collect data, which was analysed both qualitatively and quantitatively. This study adopted a descriptive data analysis and inferential data analysis. The analyzed data was presented using tables, graphs and pie charts. Results: The findings of the study revealed that the relationship between inventory ownership analysis and performance was significant at 5% level of significance. The findings of the study revealed that majority of the firms had not effectively posited inventory ownership analysis through, embracing the analysis of acquisition related costs, maintenance related costs, majority had no analysis of salvage related costs. The p-value was 0.000 which indicated that the null hypothesis failed to be accepted at 5% level of significance hence inventory ownership analysis have a significant influence on performance of manufacturing firms in Kenya. The study concluded that through adoption of inventory ownership analysis, the operational costs were reduced as well as the reduction of lead time. Unique contribution to theory, practice and policy: While the existing transaction cost theory used in this study was validated, the study recommends that the policy makers and management of manufacturing firms should invest in acquisition related costs, maintenance related costs, salvage related costs since it influences performance positively. The policy makers hold a major role in determining how key sectors such as the manufacturing sector are run. The regulators and the legislators formulate policies and guidelines that guide on how manufacturing firms should carry out their operations including supply chain processes. The study also recommended that manufacturing firms policy makers should develop a policy and regulatory framework to accelerate effective implementation inventory ownership analysis to enhance their organizational performance.
Unitary circuits for strongly correlated fermions

We introduce a scheme for efficiently describing pure states of strongly correlated fermions in higher dimensions using unitary circuits featuring a causal cone. A local way of computing local expectation values is presented. We formulate a dynamical reordering scheme, corresponding to time-adaptive Jordan-Wigner transformation, that avoids nonlocal string operators. Primitives of such a reordering scheme are highlighted. Fermionic unitary circuits can be contracted with the same complexity as in the spin case. The scheme gives rise to a variational description of fermionic models not suffering from a sign problem. We present numerical examples in a 9x9 and 6x6 fermionic lattice model to show the functioning of the approach.
Thyroid-Stimulating Hormone as a Biomarker for Stress After Thyroid Surgery: A Prospective Cohort Study

Background Thyroid-stimulating hormone (TSH), which is regulated by the negative feedback of triiodothyronine (T3) and thyroxine (T4), is affected by cortisol (a stress hormone) and cytokines during allostasis. Thus, we assessed changes in TSH levels under stress and its potential as a stress marker in patients lacking T3 or T4 feedback after thyroid surgery. Material/Methods Three stress questionnaires (Korean version of the Daily Stress Inventory, Social Readjustment Rating Scale, and Stress Overload Scale-Short [SOSS]), an open-ended questionnaire (OQ), and thyroid function tests were administered twice to 106 patients enrolled from January 2019 to October 2020. Results In a multiple generalized linear mixed-effect model (GLMM) involving 106 patients, the T3 and free T4 levels, OQ, body weight, extent of thyroidectomy, and preoperative TSH levels were significantly correlated with log-transformed TSH (lnTSH). The modified SOSS (category) based on recent stressors on OQ interview was significantly associated with lnTSH. In the GLMM with modified SOSS (category), the lnTSH increased by 2.3 and 0.56 in the unconscious high- and high-risk groups, respectively, compared to that in the low-risk group (P<0.05). The calculated power of this study was 0.92 based on α=0.05. Conclusions TSH had a significant relationship with stress and the extent of thyroidectomy. An OQ supported the SOSS to help detect unrecognized stressors. TSH has potential utility as a stress marker combined with the modified SOSS (category) with sufficient power. However, questionnaires on social environments and research on coping strategies for stress are necessary for future studies.
Blue photoluminescence in ZnGa2O4 thin-film phosphors

The growth and properties of luminescent ZnGa2O4 thin films using pulsed laser ablation has been investigated. As-deposited films on glass and (100) MgO substrates exhibit blue-white photoluminescence with a broad emission band under ultraviolet excitation. In situ epitaxial films obtained on single crystal (100) MgO substrates possess enhanced luminescent intensity as compared to polycrystalline films on glass substrates. The enhanced luminescence in epitaxial films presumably reflects lower defect densities due to growth on low energy surfaces.