Fundamental State Research Articles

Compact and broadband design of an 850nm 2 × 2 3-dB directional coupler with a shallowly etched SWG gap.

A compact and broadband 2×2 3dB directional coupler (DC) is designed at the 850nm wavelength region based on the silicon nitride platform. The proposed DC is equipped with a shallowly etched subwavelength gratings (SWG) gap so that the length of the coupling region is effectively reduced to 7.8µm for equally splitting the fundamental TE polarization state. Such a DC coupling region is much more compact than that using empty and pure SWG gaps. Meanwhile, the DC working bandwidth is determined to be broader than 106nm, and the insertion loss is always kept under an acceptable level of 0.6dB over the entire wavelength region. Considering that the shallowly etched device requires two photoetching processes in manufacturing, we did a numerical analysis to characterize the fabrication tolerance under a minimum overlay accuracy of 20nm in both x and y directions. Such overlay mismatch only increases the maximal imbalance from 0.55 to 0.6dB at the center wavelength. In addition, we discussed the impact of the proposed DC in its potential application, i.e.,optical coherence tomography. The results show that the proposed DC is able to support a high axial resolution of 3.77µm, and the 20nm overlay mismatch leads to neglected axial resolution degradation.

Article: Is the Symmetrical Classification Method EU Proof?

One way to solve classification conflicts involving hybrid entities is for states to apply a so-called symmetrical classification method, whereby a state adopts for its domestic tax purposes the tax classification applied to an entity by another state. The outcome of applying such a method can be that a state classifies foreign entities differently from domestic entities, raising potential issues from an EU law perspective when EU Member States are involved. For instance, in case a cross-border situation leads to more burdensome taxation compared to the domestic situation, a violation of the EU fundamental freedoms can be present, whereas if the classification leads to a lower tax burden for certain enterprises, a violation of EU State aid rules can be the result. In this article, we assess the conformity with primary EU law of tax classification methods, and especially of the symmetrical classification method. It is concluded that the risk of incompatibility with the EU fundamental freedoms and EU State aid rules should typically be limited when EU Member States align their tax classification rules with those of other states to alleviate risks of double (non-)taxation. Risks can increase, however, for instance if nationality is used as a distinguishing criterion, or where under- or overkill occurs. Taxation, Hybrid Entities, Mismatches, Classification, Symmetrical Method, EU Law, Fundamental Freedoms, State Aid

Health poverty, educational capital and industrial integration of rural households

Industrial integration provides an important tool to promote the revitalization of rural industries and is an effective way to promote sustainable income growth for farmers and to build a well-off society. The main implementer of rural industrial integration are individual farmers. The fundamental state of life of the farm households determines the implement ability of industrial farming cooperation. The development of rural industries has played an irreplaceable role in the process of poverty eradication in China. Promoting the integration of the three rural industries can play an important role in consolidating the fight against poverty and bridging the stage of rural revitalization to continuously play a role in the development of rural industries and lay the foundation for the smooth implementation of rural revitalization. Whereas human capital was one of the important perspectives in studying the integration of three rural industries, the relationship between human capital in education and the integration of three rural industries was empirically analyzed based on data from the China Household Tracking Survey (CFPS). With the help of a Random Forest model algorithm, the importance of key elements affecting the integration of rural industries was measured and ranked.

Few-cycle vacuum squeezing in nanophotonics.

One of the most fundamental quantum states of light is the squeezed vacuum, in which noise in one of the quadratures is less than the standard quantum noise limit. In nanophotonics, it remains challenging to generate, manipulate, and measure such a quantum state with the performance required for a wide range of scalable quantum information systems. Here, we report the development of a lithium niobate-based nanophotonic platform to demonstrate the generation and all-optical measurement of squeezed states on the same chip. The generated squeezed states span more than 25 terahertz of bandwidth supporting just a few optical cycles. The measured 4.9 decibels of squeezing surpass the requirements for a wide range of quantum information systems, demonstrating a practical path toward scalable ultrafast quantum nanophotonics.

One-way ticket to the blue: A large-scale, dated phylogeny revealed asymmetric land-to-water transitions in acariform mites (Acari: Acariformes)

Acariform mites are an ancient and megadiverse lineage that may have experienced a complex pattern of invasions into terrestrial and aquatic habitats. These among-realm transitions may relate to periods of turmoil in Earth’s history or be simply results of uneven biodiversity patterns across habitats. Here, we inferred a dated, representative acariform phylogeny (five genes, 9,200 bp aligned, 367 terminals belonging to 150 ingroup plus 15 outgroup families, 23 fossil calibration points) which was used to infer transitions between marine/freshwater/terrestrial habitats. We detected four unambiguous transitions from terrestrial to freshwater habitats (Hydrozetes, Naiadacarus, Fusohericia, Afronothrus, Homocaligus); one from freshwater to marine (Pontarachnidae), and four from marine to brackish or freshwater transitions (all among Halacaridae: Acarothrix; Halacarellus petiti; Copidognathus sp.; clade Limnohalacarus + Soldanellonyx + Porohalacarus + Porolohmannella). One transition to the sea was inferred ambiguously with respect to the ancestor being either terrestrial or freshwater (Hyadesiidae), and another must be most carefully examined by adding potential related taxa (Selenoribatidae + Fortuyniidae). Finally, we inferred a single, remarkable transition from aquatic to terrestrial habitats involving early evolution of the large and ecologically diverse lineage: the ancestor of the Halacaridae + Parasitengona clade was probably freshwater given our dataset, thus making terrestrial Parasitengona secondarily terrestrial. Overall, our results suggested a strong asymmetry in environmental transitions: the majority occurred from terrestrial to aquatic habitats. This asymmetry is probably linked to mites’ biological properties and uneven biodiversity patterns across habitats rather than Earth’s geological history. Since the land holds more acariform diversity than water habitats, a shift from the former is more likely than from the latter. We inferred the following relationships: alicid endeostigmatid + eriophyoid (Alycidae, (Nanorchestidae, (Nematalycidae, Eriophyoidea))) being sister group to the remaining Acariformes: (proteonematalycid Endeostigmata, alicorhagiid Endeostigmata, Trombidiformes, Oribatida (including Astigmata)). Trombidiform relationships had several novel rearrangements: (i) traditional Eupodina lacked support for the inclusion of Bdelloidea; (ii) Teneriffidae, traditionally placed among Anystina, was consistently recovered in a clade including Heterostigmata in Eleutherengona; (iii) several lineages, such as Adamystidae, Paratydeidae, Caeculidae and Erythracaridae, were recovered in a large clade along other Anystina and Eleutherengona, suggesting single origins of several fundamental character states, such as the reduction of the cheliceral fixed digit and development of the palpal thumb-claw complex.

Truthmaker puzzles for one-level physicalists

According to one-level physicalism, reality is exhausted by fundamental physical entities and properties. This position is sometimes defended on the basis of the truthmaker view of ontological commitment. Accordingly, physicalists can affirm higher-level truths without ontologically committing to any higher-level properties or states of affairs; fundamental physical states of affairs serve as truthmakers of all truths that have truthmakers, and a physicalist’s ontology should consist of nothing but the fundamental physical states of affairs and their constituents. In this paper, I raise a problem for one-level physicalists who defend their views by appealing to the truthmaker view of ontological commitment. I argue that the truthmaker view faces certain puzzles the solutions of which clash with the main tenets of one-level physicalism. I conclude that either truthmaking is not a good guide to ontological commitment or one-level physicalism cannot be defended on the basis of the truthmaker view.

Harmonic Dissipative Soliton Resonance in an Er/Yb Co-Doped Fiber Laser Based On SESAM

Fundamental and harmonic mode-locking in the dissipative soliton resonance (DSR) regime is experimentally investigated in a net-normal-dispersion Er/Yb co-doped fiber laser based on the semiconductor saturable mirror (SESAM), where an equivalent narrow-band spectral filter is used for triggering multi-pulsing. By monotonically increasing the pump power with the fixed polarization controller (PC), the fundamental mode-locking operation of DSR pulses can be transformed into the harmonic mode-locking (HML) under the specific conditions. The main reason is the peak-power-clamping effect induced by the combined effects of the spectral filtering and saturable absorption of the SESAM at higher pump levels, which is applied to achieve the HML in the DSR regime for the first time. The DSR pulse broadens linearly with the pump power in a certain range, no matter whether it is in the fundamental mode-locking or HML state. By incorporating the dispersion compensation fiber (DCF) with different lengths, the pulse characteristics are discussed and compared in detail. The enhanced nonlinearity caused by increasing DCF length can lead to higher orders of HML pulses and even the generation of noise-like pulses (NLPs) with a long-enough DCF.

Superego, Desire, and Living for Others in Asako I & II

Asako I & II portrays the internal conflict of letting the demands of the Other dictate one’s own decisions. This article focuses on the film’s representation of two psychoanalytic concepts: superego, the part of the psyche that enforces adherence to the social order, and desire, a fundamental state of lack where an indescribable lost object is supplemented by empirical objects. This article analyzes certain sequences to reveal how Asako, the film’s protagonist, lets herself be dominated by the demands of the Other. Ultimately, the quest to either obey her superego or realize her desire proves unfulfilling.

Theoretical investigation of compressed hexagonal and rock-salt structures of molybdenum and chromium carbides

This research paper reports the structural, electronic, elastic anisotropy, and thermodynamic characteristics of Molybdenum and Chromium Carbides (MoC and CrC) at zero and under high pressures. We consider both hexagonal tungsten carbide phase (WC) and rock-salt (NaCl) structures. Our investigation is performed using the first-principles pseudo-potential plane waves method. The fundamental ground state is the hexagonal (WC) phase for MoC and CrC compounds. MoC is relatively more ionic than CrC. The investigated materials are brittle in the WC phase and ductile in the RS phase for pressures below 30 GPa. MoC and CrC are hard materials and anisotropic in sound velocity. Phonon spectra are reported for both compounds in a WC and NaCl at zero-pressure and high pressures. Ideal stoichiometric WC crystals of MoC and CrC are predicted to be dynamically stable. The pressure and temperature dependence of various macroscopic thermodynamic parameters of MoC and CrC compounds are also discussed.

Coherent control of transverse modes in semiconductor laser frequency combs via radio-frequency injection

Increasing the output power of semiconductor laser frequency combs, while maintaining a single-lobe far-field characteristic is of great interest for mid-infrared sensing applications. Broadening of the ridge waveguide represents the most common approach for power scaling, however, the excitement of higher-order transverse modes often limits general applicability. Here, we demonstrate that the coherent control of the longitudinal laser modes enables control over the transverse modes of a quantum cascade laser. Modulating the laser in a frequency range 60 ± 3 MHz above the free-running laser beatnote and applying modulation powers above 25 dBm provides reliable fundamental transverse mode operation, observable as single-lobe, Gaussian-like characteristic in the recorded far-field. Furthermore, coherent comb operation for both fundamental and higher-order transverse mode states is demonstrated.

The Logical Sustainability Theory for pension systems: the discrete-time model in a stochastic framework under variable mortality

Abstract The aim of this work is to provide the logical sustainability model for defined contribution pension systems (see [1], [2]) in the discrete framework under stochastic financial rate of the pension system fund and stochastic productivity of the active participants. In addition, the model is developed in the assumption of variable mortality tables. Under these assumptions, the evolution equations of the fundamental state variables, the pension liability and the fund, are provided. In this very general discrete framework, the necessary and sufficient condition of the pension system sustainability, and all the other basic results of the logical sustainability theory, are proved. In addition, in this work new results on the efficiency of the rule for the stabilization over time of the level of the unfunded pension liability with respect to wages, level that is defined as β indicator, are also proved.

TO STUDY THE ROLE OF AYURVEDA ON MICROBIAL LOAD FOR IMPROVING THE TASTE

The term Ayurveda comprises two words – ayu (life) and veda (knowledge), thus, deals with various aspects related to health and wellbeing in their diverse aspects, such as happy life, sustainable happiness, and longevity (3). According to Ayurveda, there are three fundamental states of a being such as the physical (including physiological), mental, and the spiritual.In the present article we are discussing the role of ayurveda in improving taste.

The robustness of Random Forest and Support Vector Machine Algorithms to a Faulty Heart Sound Segmentation.

Cardiac auscultation is the key exam to screen cardiac diseases both in developed and developing countries. A heart sound auscultation procedure can detect the presence of murmurs and point to a diagnosis, thus it is an important first-line assessment and also cost-effective tool. The design automatic recommendation systems based on heart sound auscultation can play an important role in boosting the accuracy and the pervasiveness of screening tools. One such as step, consists in detecting the fundamental heart sound states, a process known as segmentation. A faulty segmentation or a wrong estimation of the heart rate might result in an incapability of heart sound classifiers to detect abnormal waves, such as murmurs. In the process of understanding the impact of a faulty segmentation, several common heart sound segmentation errors are studied in detail, namely those where the heart rate is badly estimated and those where S1/S2 and Systolic/Diastolic states are swapped in comparison with the ground truth state sequence. From the tested algorithms, support vector machine (SVMs) and random forest (RFs) shown to be more sensitive to a wrong estimation of the heart rate (an expected drop of 6% and 8% on the overall performance, respectively) than to a swap in the state sequence of events (an expected drop of 1.9% and 4.6%, respectively).

Adaptively Adjusted Beliefs About Prices in an Evolutive Muthian Cobweb Model

In the present work, starting from the 1D evolutionary Muthian cobweb model in [Hommes & Wagener, 2010], where the economy is populated by biased firms and unbiased fundamentalist firms, we investigate the effects generated by adaptively adjusted beliefs on the long-period price of the goods produced. As in [Hommes & Wagener, 2010], we focus on the case in which the Muthian model is globally stable in the sense of Guesnerie [2002], stable under naive expectations. Coupling into the details, we first assume that just biased producers, being aware of the systematic errors they make in their forecasts, partially rely on an adaptive adjustment of beliefs, obtaining a 3D model, which has a unique steady state. Although in [Hommes & Wagener, 2010] the fundamental steady state is always stable and at most it can coexist with a period-two cycle, we show that the complexity degree increases in our case, where on increasing the reactivity of the evolutionary mechanism, there may be up to two stability thresholds for the steady state, both corresponding to flip bifurcations, and the equilibrium can coexist with a quasiperiodic attractor. On checking the robustness of such outcomes, we contrast them with those we find for the 4D setting, obtained by assuming that unbiased fundamentalists update their belief about the fundamental value partially relying on the same adaptive adjustment mechanism used by biased producers. The outcomes are similar to those of the 3D framework. For instance, in both cases, there exists just the fundamental equilibrium, which can coexist with a quasiperiodic attractor.

Impact of large-scale activities on macroscopic fundamental diagram: Field data analysis and modeling

Large-scale activities always have serious impacts on regional traffic states. It is necessary for traffic planners to investigate the characteristics of network traffic flow under large-scale activities and apply proper management strategies. In this paper, based on the field data in Tianjin, China, the impact of large-scale activities and the corresponding control strategies on regional Macroscopic Fundamental Diagram (MFD) and regional traffic states are analyzed. The study area is divided into the inner area and the outer area. Based on the work of Haddad (2012) on the traffic perimeter control in two-region, a dynamic model is calibrated by the empirical data in Tianjin to study the influences of activities and control strategies. Based on the calibrated model, different control strategies are simulated to investigate the impacts on regional traffic flow. The results show that decreasing the transfer flow from the outer area will alleviate the congestion in the inner area effectively, and increasing the system outflow will reduce the densities of both two areas effectively. When the traffic states are already congested, the real control strategies cannot alleviate the congestion of the regional network effectively. According to the various impacts of different strategies, combined control strategies are proposed to mitigate the adverse impact of large-scale activities on the surrounding area.

Mind the Gap: Norm-Aware Adaptive Robust Loss for Multivariate Least-Squares Problems

Measurement outliers are unavoidable when solving real-world robot state estimation problems. A large family of robust loss functions (RLFs) exists to mitigate the effects of outliers, including newly developed adaptive methods that do not require parameter tuning. All of these methods assume that residuals follow a zero-mean Gaussian-like distribution. However, in multivariate problems the residual is often defined as a norm, and norms follow a Chi-like distribution with a non-zero mode value. This produces a “mode gap” that impacts the convergence rate and accuracy of existing RLFs. The proposed approach, “Adaptive MB,” accounts for this gap by first estimating the mode of the residuals using an adaptive Chi-like distribution. Applying an existing adaptive weighting scheme only to residuals greater than the mode leads to more robust performance and faster convergence times in two fundamental state estimation problems, point cloud alignment and pose averaging.

Experimental quantum simulation of non-Hermitian dynamical topological states using stochastic Schrödinger equation

Noise is ubiquitous in real quantum systems, leading to non-Hermitian quantum dynamics, and may affect the fundamental states of matter. Here we report in an experiment a quantum simulation of the two-dimensional non-Hermitian quantum anomalous Hall (QAH) model using the nuclear magnetic resonance processor. Unlike the usual experiments using auxiliary qubits, we develop a stochastic average approach based on the stochastic Schrödinger equation to realize the non-Hermitian dissipative quantum dynamics, which has advantages in saving the quantum simulation sources and simplifying the implementation of quantum gates. We demonstrate the stability of dynamical topology against weak noise and observe two types of dynamical topological transitions driven by strong noise. Moreover, a region where the emergent topology is always robust regardless of the noise strength is observed. Our work shows a feasible quantum simulation approach for dissipative quantum dynamics with stochastic Schrödinger equation and opens a route to investigate non-Hermitian dynamical topological physics.

Remote State Estimation With Smart Sensors Over Markov Fading Channels

We consider a fundamental remote state estimation problem of discrete-time linear time-invariant (LTI) systems. A smart sensor forwards its local state estimate to a remote estimator over a time-correlated multistate Markov fading channel, where the packet drop probability is time-varying and depends on the current fading channel state. We establish a necessary and sufficient condition for mean-square stability of the remote estimation error covariance in terms of the state transition matrix of the LTI system, the packet drop probabilities in different channel states, and the transition probability matrix of the Markov channel states. To derive this result, we propose a novel estimation-cycle based approach and provide new elementwise bounds of matrix powers. The stability condition is verified by numerical results and is shown more effective than existing sufficient conditions in the literature. We observe that the stability region in terms of the packet drop probabilities in different channel states can either be convex or nonconvex depending on the transition probability matrix of the Markov channel states. Our numerical results suggest that the stability conditions for remote estimation may coincide for setups with a smart sensor and with a conventional one (which sends raw measurements to the remote estimator) though the smart sensor setup achieves a better estimation performance.

NIR photon downshifting via host sensitization in Yb3+-doped La2Ti2O7 and BaTi(PO4)2

La2-xYbxTi2O7 (x = 0.0, 0.01, 0.02, 0.04, 0.06 and 0.08) and Ba1-yYbyTi(PO4)2 (y = 0.0, 0.01, 0.02, 0.04, 0.06 and 0.08) ceramic powders were synthesized by the polymeric complex and solid state methods, respectively. The crystal structure and optical properties of the powders were investigated by X-ray diffraction (XRD), diffuse reflectance, and photoluminescence spectroscopies. From the XRD results it was possible to observe that all the samples exhibit a monoclinic structure. One the other hand, the diffuse reflectance spectra show a broadband below 400 nm ascribed to the ligand-to-metal charge transfer (LMCT) O2− → Ti4+ fundamental state. Near infrared (NIR) photon downshifting via host sensitization in both Yb3+-doped solid solutions was observed. The La2Ti2O7 and BaTi(PO4)2 were chosen by their highest self-trapped exciton, which could increase the sensitization of the Yb3+ emission. However, the localization of the exciton does not play an important role in this process, since the level of localization is similar, but the integrated emission intensity is quite different for Yb3+ in both solid solutions. The undoped compounds can be excited by UV light and they present a broad visible-NIR emission (centered at 850 nm) which may be attributed to a lower electronic energy state of the exciton (reverse LMCT O2− → Ti4+ transition), this emission is reduced with the increasing of the Yb3+ amount. It provides evidence about the energy transfer process from the lower electronic energy state of the exciton to the Yb3+ ion. Photoluminescence emission and diffuse reflectance spectra in the visible and NIR, reveal an emission band that overlaps with the absorption band of the Yb3+, explaining the energy transfer process from the host to Yb3+.

Fundamental Care's state of knowledge around the world: Where are we now? A scoping review.

To investigate and describe the current state of knowledge about Fundamental Care in terms of population, contexts, concepts and gaps. A scoping review. CINAHL, Medline, PsycINFO and EMBASE databases were searched in April 2021 for eligible literature, published from January 2010, onwards. This scoping review was built around the recommendations of Peters et al. (2020 version). Two researchers conducted the literature search, and three researchers independently screened the titles and abstracts of the retrieved studies' data, using the eligibility criteria and the review questions as a guide. The search yielded 763 records, of which 107 were included. Results are presented under seven subheadings: (a) Countries and Continents, (b) Context, (c) Research Design, (d) Publishing/Journal, (e) Participants and Population, (f) Keywords and (g) Fundamental of Care Framework and Practice Process. All the retrieved articles describe the current state of knowledge about Fundamental Care in terms of population, contexts, concepts and gaps. This scoping review highlighted the elevated number of articles that have been published since the beginning of the work on Fundamental Care, 10 years ago. The included articles are related to different dimensions of research, practice and teaching and to the Fundamentals of Nursing Care, but also to nursing theory. Finally, most of the articles had a nursing focus. The results of this scoping review allow us to highlight the work from the past 10 years. This may be of interest to learn more about the research surrounding Fundamental Care. This scoping review allows us to better target the theoretical and empirical developments to focus on in the coming years.