Miracle-dz/UniFAR-FTUs huggingface dataset:
Heisenberg Exchange and Dzyaloshinskii–Moriya Interaction in Ultrathin Pt(W)/CoFeB Single and Multilayers

We present results of the analysis of Brillouin light-scattering (BLS) measurements of spin waves performed on ultrathin single and multirepeat CoFeB layers with adjacent heavy metal layers. From a detailed study of the spin-wave dispersion relation, we independently extract the Heisenberg exchange interaction (also referred to as symmetric exchange interaction), the Dzyaloshinskii–Moriya interaction (DMI, also referred to as antisymmetric exchange interaction), and the anisotropy field. We find a large DMI in CoFeB thin films adjacent to a Pt layer and nearly vanishing DMI for CoFeB films adjacent to a W layer. Furthermore, the influence of the dipolar interaction on the dispersion relation and on the evaluation of the Heisenberg exchange parameter is demonstrated. Eventually, an experimental analysis of the impact of the DMI on the spin-wave lifetime is presented.
On a logarithmic sum related to a natural quadratic sieve

We study the sum $\Sigma_v(U)=\sum_{\substack{d,e\leq U\\(de,v)=1}}\frac{\mu(d)\mu(e)}{[d,e]}\log\left(\frac{U}{d}\right)\log\left(\frac{U}{e}\right)$, $U>1$, so that a continuous, monotonic and explicit version of Selberg's sieve can be stated. Thanks to Barban-Vehov (1968), Motohashi (1974) and Graham (1978), it has been long known, but never explicitly, that $\Sigma_1(U)$ asymptotes $\log(U)$. In this article, we discover not only that $\Sigma_q(U)\sim\frac{q}{\varphi(q)}\log(U)$ for all $q\in\mathbb{Z}_{>0}$, but also, and more importantly, we are able to estimate explicitly $\Sigma_v(U)$ for $v\in\{1,2\}$ by giving rigorously their asymptotic expansion. We thus have $\Sigma_v(U)= \frac{v}{\varphi(v)}\log(U)-\mathfrak{s}_v+O_v^*\left(\frac{K_v}{\log(U)}\right)$, for some explicit constant $K_v > 0$, where $\mathfrak{s}_1=0.60731\ldots$, and $\mathfrak{s}_2=1.4728\ldots$. Furthermore, we provide a closed-form expression for the constant term $\mathfrak{s}_q$ appearing in the asymptotic expression of $\Sigma_q(U)$, for all $q\in\mathbb{Z}_{>0}$. As an application, we show how our result gives an explicit version of the Brun-Titchmarsh theorem within a range.
OPTION PRICING IN MARKETS WITH INFORMED TRADERS

The objective of this paper is to introduce the theory of option pricing for markets with informed traders within the framework of dynamic asset pricing theory. We introduce new models for option pricing for informed traders in complete markets, where we consider traders with information on the stock price direction and stock return mean. The Black–Scholes–Merton option pricing theory is extended for markets with informed traders, where price processes are following continuous-diffusions. By doing so, the discontinuity puzzle in option pricing is resolved. Using market option data, we estimate the implied surface of the probability for a stock upturn, the implied mean stock return surface, and implied trader information intensity surface.
Modular properties of type I locally compact quantum groups

The following paper is devoted to the study of type I locally compact quantum groups. We show how various operators related to the modular theory of the Haar integrals on G and ˆG act on the level of direct integrals. Using these results we derive a web of implications between properties such as unimodularity or traciality of the Haar integrals. We also study in detail two examples: discrete quantum group ˆSUq(2) and the quantum az+b group.
Small rodents in the crop ecosystem of Pothwar Plateau, Pakistan

In a 16-month study on rodent-infestation patterns in crop fields on the Pothwar Plateau, Pakistan, five rodent species were found to occur in the following order of dominance: Tatera indica, Bandicota bengalensis, Mus spp. , Golunda ellioti and Nesokia indica. On the basis of the trapping data, the first three species were considered to have pest status and their relative abundance changed from season to season. During spring, T. indica and B. bengalensis were the dominant species. B. bengalensis became dominant in summer. The proportion of T. indica increased during the monsoon season and autumn (58.5%) and reached almost 95% during winter. Mus species were more common than B. bengalensis in the post-summer monsoon and autumn. G. ellioti and N. indica were captured occasionally, and showed no seasonal preference. As N. indica is a highly fossorial species, surface trapping is believed to have underestimated its prevalence. Unlike the other species, the population of T. indica was stable all over seasons; this appeared to be linked to its use of the wild vegetation on the field boundaries. This preliminary information highlights the need for further studies to explore the life-history traits and habitats of these rodent species.
Uniform stability of a class of large-scale parallel server networks.

In this paper we show that a large class of parallel server networks, with $\sqrt{n}$ safety staffing, and no abandonment, in the Halfin-Whitt regime are exponentially ergodic and their invariant probability distributions are tight, uniformly over all stationary Markov controls. This class consists of all networks of tree topology with a single non-leaf server pool, such as the 'N' and 'M' models, as well as networks of any tree topology with class-dependent service rates. We first define a parameter which characterizes the spare capacity (safety staffing) of the network. If the spare capacity parameter is negative, we show that the controlled diffusion is transient under any stationary Markov control, and that it cannot be positive recurrent when this parameter is zero. Then we show that the limiting diffusion is uniformly exponentially ergodic over all stationary Markov controls if this parameter is positive. As well known, joint work conservation, that is, keeping all servers busy unless all queues are empty, cannot be always enforced in multiclass multi-pool networks, and as a result the diffusion limit and the prelimit do not "match" on the entire state space. For this reason, we introduce the concept of "system-wide work conserving policies," which are defined as policies that minimize the number of idle servers at all times. We show that, provided the spare capacity parameter is positive, the diffusion-scaled processes are geometrically ergodic and the invariant distributions are tight, uniformly over all system-wide work conserving policies. In addition, when the spare capacity is negative we show that the diffusion-scaled processes are transient under any stationary Markov control, and when it is zero, they cannot be positive recurrent. We use a unified approach in which the same Lyapunov function is used in the study of the prelimit and diffusion limit.
Fecundity and egg size variation in North American Pacific salmon (Oncorhynchus)

We examined regional and latitudinal variation in fecundity and egg weight for five species of Pacific salmon (Oncorhynchus) along the Pacific coast of North America. Data were examined for 24 chum salmon, 15 pink salmon, 34 sockeye salmon, 44 chinook salmon, and 40 coho salmon populations from published sources, unpublished Canadian hatchery records, our own laboratory investigations, and other unpublished sources. Substantial regional variation in fecundity and egg weight was observed, with salmon on the Queen Charlotte Islands and Vancouver Island in British Columbia generally having lower fecundity and larger egg size than nearby mainland populations. The relative distance of freshwater migration to the spawning grounds generally had a marked effect on both fecundity and egg size, with populations spawning in the upper portions in the drainages of large rivers like the Fraser River in British Columbia having reduced fecundity and egg size compared with coastal spawning populations. Fecundity was generally higher and egg size generally lower in more northern populations of sockeye, chinook, and coho salmon compared with southern ones. We suggest that egg size tends to be lower in northern populations of some species as a result of increased fecundity due to their older ages at maturity and a limited amount of energy that can be expended on egg production.
A Low-Memory Implementation of Perfectly Matched Layers with Smooth-Varying Coefficients in Discontinuous Galerkin Time Domain Methods

This work is supported by the King Abdullah University of Science and Technology (KAUST) Office of Sponsored Research (OSR) under Award No 2016-CRG5-2953. The authors would like to thank the KAUST Supercomputing Laboratory (KSL) for providing the required computational resources.
Photic and nonphotic inputs to the diurnal circadian clock

Diurnal animals occupy a different temporal niche from nocturnal animals and are consequently exposed to different amounts of light as well as different dangers. Accordingly, some variation exists in the way that diurnal animals synchronize their internal circadian clock to match the external 24-hour daily cycle. First, though the brain mechanisms underlying photic entrainment are very similar among species with different daily activity patterns, there is evidence that diurnal animals are less sensitive to photic stimuli compared to nocturnal animals. Second, stimuli other than light that synchronize rhythms (i.e. nonphotic stimuli) can also entrain and phase shift daily rhythms. Some of the rules that govern nonphotic entrainment in nocturnal animals as well as the brain mechanisms that control nonphotic influences on rhythms do not appear to apply to diurnal animals, however. Some evidence supports the idea that arousal or activity plays an important role in entraining rhythms in diurnal animals, either during the light (active) or dark (inactive) phases, though no consistent pattern is seen. GABAergic stimulation induces phase shifts during the subjective day in both diurnal and nocturnal animals. In diurnal Arvicanthis niloticus (Nile grass rats), SCN GABAA receptor activation at this time results in phase delays while in nocturnal animals phase advances are induced. It appears that the effect of GABA at this circadian phase results from the inhibition of period gene expression in both diurnal and nocturnal animals. Nonetheless, the resulting phase shifts are in opposite directions. It is not known what stimuli or behaviours ultimately induce changes in GABA activity in the SCN that result in alterations of circadian phase in diurnal grass rats. Taken together, studies such as these suggest that it may be problematic to apply the principles governing nocturnal nonphotic entrainment and its underlying mechanisms to diurnal species including humans.
Effect of Light on Germination of Light-Sensitive Seeds

1. The seeds of Rumex crispus, Datura Stramonium, and Phoradendron flavescens were found to be light sensitive. The germination of seeds of Rumex crispus and Phoradendron flavescens was promoted by light; the germination of seeds of Datura Stramonium was hindered by light. 2. Abrasion and removal of coats (ovary walls) of Rumex crispus seeds promoted their germination in darkness. 3. Treatment of seeds of Rumex crispus and Oenothera biennis with concentrated sulphuric acid caused an increase in the percentage of germination in darkness. 4. No reciprocal relation between the effects of light and temperature was found. 5. Light was not necessary for the absorption of sufficient water for germination. 6. Injection of water did not yield increased germination in darkness. 7. Almost all kinds of single electrolytes, regardless of the nature of the ions, seemed to promote germination of seeds of Oenothera biennis, Nicotiana Tabacum, and Verbascum Thapsus in darkness. 8. Embryos of seeds incubated in light became more acid than those incubated in darkness. 9. Light seemed to activate lipolytic enzymes which hydrolyzed fats to fatty acids. 10. The germination of seeds of Rumex crispus in darkness was promoted (increased) by hot water treatment, abrasion, treatment with concentrated sulphuric acid, increased oxygen pressure, fluctuating temperatures, and soaking in solutions of hydrochloric acid, sodium sulphocyanate, and hydrogen peroxide. 11. The germination of seeds of Nicotiana Tabacum in darkness was promoted by soaking in solutions of hydrochloric acid, sodium sulphocyanate, and hydrogen peroxide, as well as by the use of many single electrolytes as substrata. 12. The germination of seeds of Verbascum Thapsus in darkness was promoted by the action of light, fluctuation of temperature during incubation, alternating high and low temperatures, soil, and many single electrolytes as substrata. 13. The germination of seeds of Oenothera biennis in darkness was promoted during certain seasons by hot water treatment, sulphuric acid, preliminary incubation at low temperature, incubation in alternating high and low temperatures, and single electrolytes as substrata. 14. The germination of seeds of Daucus Carota in darkness was promoted by increased oxygen pressure and preliminary incubation at low temperature, while it was hindered by soaking in hydrochloric acid and by the use of single electrolytes as substrata.
Topological Mathieu Moonshine.

We explore the Atiyah-Hirzebruch spectral sequence for the $tmf^\bullet[\frac12]$-cohomology of the classifying space $BM_{24}$ of the largest Mathieu group $M_{24}$, twisted by a class $\omega \in H^4(BM_{24};Z[\frac12]) \cong Z_3$. Our exploration includes detailed computations of the $Z_3$-cohomology of $M_{24}$ and of the first few differentials in the AHSS. We are specifically interested in the value of $tmf^\bullet_\omega(BM_{24})[\frac12]$ in cohomological degree $-27$. Our main computational result is that $tmf^{-27}_\omega(BM_{24})[\frac12] = 0$ when $\omega \neq 0$. For comparison, the restriction map $tmf^{-3}_\omega(BM_{24})[\frac12]\to tmf^{-3}(pt)[\frac12] \cong Z_3$ is nonzero for one of the two nonzero values of $\omega$. Our motivation comes from Mathieu Moonshine. Assuming a well-studied conjectural relationship between $TMF$ and supersymmetric quantum field theory, there is a canonically-defined $Co_1$-twisted-equivariant lifting $[\bar{V}^{f\natural}]$ of the class $\{24\Delta\} \in TMF^{-24}(pt)$, where $Co_1$ denotes Conway's largest sporadic group. We conjecture that the product $[\bar{V}^{f\natural}] \nu$, where $\nu \in TMF^{-3}(pt)$ is the image of the generator of $tmf^{-3}(pt) \cong Z_{24}$, does not vanish $Co_1$-equivariantly, but that its restriction to $M_{24}$-twisted-equivariant $TMF$ does vanish. This conjecture answers some of the questions in Mathieu Moonshine: it implies the existence of a minimally supersymmetric quantum field theory with $M_{24}$ symmetry, whose twisted-and-twined partition functions have the same mock modularity as in Mathieu Moonshine. Our AHSS calculation establishes this conjecture "perturbatively" at odd primes. An appendix included mostly for entertainment purposes discusses "$\ell$-complexes" and their relation to $\mathrm{SU}(2)$ Verlinde rings. The case $\ell=3$ is used in our AHSS calculations.
UV freeze-in in Starobinsky inflation

In the Starobinsky model of inflation, the observed dark matter abundance can be produced from the direct decay of the inflaton field only in a very narrow spectrum of close-to-conformal scalar fields and spinors of mass ∼ 107 GeV. This spectrum can be, however, significantly broadened in the presence of effective non-renormalizable interactions between the dark and the visible sectors. In particular, we show that UV freeze-in can efficiently generate the right dark matter abundance for a large range of masses spanning from the keV to the PeV scale and arbitrary spin, without significantly altering the heating dynamics. We also consider the contribution of effective interactions to the inflaton decay into dark matter.
DESICCATION INJURY IN MOSSES

Summary Intra-specific differences in desiccation injury are shown in collections of Acrocladium cuspidatum, Climacium dendroides and Hypnum cupressiforme from habitats subjected to a wide range of moisture stresses. The degree of desiccation tolerance is correlated with degree of moisture stress in the habitat. Desiccation injury was measured as the decline in the initial rate of photosynthesis on remoistening. Collections of species from habitats in which severe moisture deficits occur show a slower decline in photosynthesis on desiccation and a more rapid recovery of function on wetting than collections from habitats with no appreciable moisture deficits. The results are discussed in terms of their ecological and physiological significance.
Seasonal variation in intake and digestion of a high-roughage diet by muskoxen

We studied changes in body weight, intake, retention time and apparent digestibility of a supplemented brome-alfalfa hay by mature muskoxen held near Saskatoon, Saskatchewan during two seasonal cycles. Body weights and voluntary intake were monitored during 16 trials from late March 1990 to December 1991, in four annually breeding females and in three hysterectomized females. Retention time of the hay and apparent digestibility of the diet were estimated in winter and summer 1991 from fecal excretion of chromium (Cr) after a pulse dose of Cr-mordanted hay, and from forage/fecal concentrations of chromic oxide, respectively, in six non-breeding muskoxen. Mean (±SE) body weights of breeding females were greatest in February and March (248 ± 5 kg) and lowest following calving in late May or early June (216 ± 6 kg), while mean weight of hysterectomized females declined little from a peak of 228 ± 21 kg in February-March to a low of 213 ± 21 kg in July. Mean dry matter intake of breeding females was highest in.
Toward a Physics Based Model of Hypervelocity Dust Impacts

There has been important understanding of the process by which a hypersonic dust impact makes an electrical signal on a spacecraft sensor, leading to a fuller understanding of the physics. Zaslavsky (2015), https://doi.org/10.1002/2014ja020635 showed that the most important signal comes from the charging of the spacecraft, less from charging of an antenna. The present work is an extension of the work of Zaslavsky. An analytical treatment of the physics of a hypersonic dust impact and the mechanism for generating an electrical signal in a sensor, an antenna, is presented. The treatment is compared with observations from STEREO and Parker Solar Probe. A full treatment of this process by simulations seems beyond present computer capabilities, but some parts of the treatment must depend on simulations but other features can be better understood through analytical treatment. Evidence for a somewhat larger contribution from the antenna part of the signal than in previous publications is presented. Importance of electrostatic forces in forming the exiting plasma cloud is emphasized. Electrostatic forces lead to a rapid expansion of the escaping cloud, so that it expands more rapidly than it escapes, and sometimes surrounds one or more antennas. This accounts for the ability of dipole antennas to detect dust impacts. Some progress toward understanding occasional negative charging of an antenna is presented, together with direct evidence of such charging. Use of laboratory measurements of charge to estimate size of spacecraft impacts are shown to be not reliable without further calibration work.
Use of visual cues in foraging by a diurnal herbivore, Belding's ground squirrel

Ground squirrels' vision has been fairly well characterized, but whether they actually use vision in foraging has not been demonstrated. Belding's ground squirrels (Spermophilus beldingi) were allowed to forage under natural conditions for experimental bait stations to test the hypothesis that they can learn to use visual cues to forage more efficiently. Bait stations with visual cues were more likely to be found, and were found more quickly, than controls. Bait stations in taller and (or) denser vegetation were less likely to be found, suggesting that the value of visual cues may change during the growing season. Visual cues can be used to increase foraging efficiency, but other cues are probably used as well.
Pollen-ovule ratio, pollen size, and breeding system in Astragalus (Fabaceae) subgenus Epiglottis: a pollen and seed allocation approach

The correlation between pollen/ovule (P/O) ratio and breeding system has generally been accounted for either on the basis that P/O reflects pollination efficiency, or in terms of the sex allocation theory. The following were assessed for taxa belonging to genus Astragalus subgenus Epiglottis: 1) Degree of correlation between P/O and the breeding system, measured by means of autofertility; 2) The absence or existence of correlation between P/O and pollen grain size; and 3) The ability of various theories to account for the results obtained. Results showed a minimal correlation between P/O and autofertility, and between P/O and pollen grain size in the taxa studied. Analysis of these results in terms of the sex allocation theory enabled this correlation to be explained as a function of the variation existing between taxa with respect to the resources invested in each pollen grain and in each ovule. The predictive capacity of this theory, which has moreover proven valuable in explaining the structural peculiarities of the androecium in these taxa, was also highlighted. The type of self-pollination applicable was also discussed, as was the phenotypic model of selection of self-fertilization considered most plausible for these taxa. From the analysis of 80 different species, Cruden (1977) concluded that the ratio of pollen grains to number of ovules (P/O) was related to the plant breeding system. The greater the degree of autogamy, the lower the P/O. This relationship was predicated on the assumption that the P/O reflected the efficiency of pollination: "The more efficient the transfer of pollen, the lower the P/O should be" (Cruden, 1977).
Altitudinal Zonation of Geometrid Larvae (Lep.) during a Mass Occurrence on Birch at Sogndal, Western Norway, I967

Larvae of Geometridae (Lep.) attacked the birch wood (Betula pubescens Ehrh.) in the mountain slopes near Sogndal, Sogn, in I966 and I967. Collecting of larvae were made in I967 by sweep-netting on five stations at different altitudes up to timber line at 900 m a.s. The maximum density of Operophthera sp. , at about 300 m a.s. , was estimated to be about five times higher than the maximum density of Oporinia autumnata Bkh. just below the timber line. A horizontal, brownish belt, where the trees were heavily defoliated, extended from approximately 250 to 350 m a.s. The trees near the timber line were not so heavily defoliated. The least defoliated trees were found at about 650-700 m a.s. , in the overlapping zone of the two geometrid species. Operophthera sp. was found at all altitudes, while O. autumnata occurred only in the upper half of the birch wood. Erannis aurantiaria Hb. and E. defoliaria Cl. also occurred at all altitudes. The former preferred the lower part of the birch wood, and was always present in densities lower than O. autumnata's highest density. Only a few larvae of E. defoliaria were found, without showing any altitudinal preference.