A Performance–Consumption Balanced Scheme of Multi-Hop Quantum Networks for Teleportation

Teleportation is an important protocol in quantum communication. Realizing teleportation between arbitrary nodes in multi-hop quantum networks is of great value. Most of the existing multi-hop quantum networks are based on Bell states or Greeberger–Horne–Zeilinger (GHZ) states. Bell state is more susceptible to noise than GHZ states after purification, but generating a GHZ state consumes more basic states. In this paper, a new quantum multi-hop network scheme is proposed to improve the interference immunity of the network and avoid large consumption at the same time. Teleportation is realized in a network based on entanglement swapping, fusion, and purification. To ensure the robustness of the system, we also design the purification algorithm. The simulation results show the successful establishment of entanglement with high fidelity. Cirq is used to verify the network on the Noisy Intermediate-Scale Quantum (NISQ) platform. The robustness of the fusion scheme is better than the Bell states scheme, especially with the increasing number of nodes. This paper provides a solution to balance the performance and consumption in a multi-hop quantum network.

African easterly waves in an idealized general circulation model: instability and wave packet diagnostics

We examine the group dynamic of African easterly waves (AEWs) generated in a realistic, spatially non-homogeneous African easterly jet (AEJ) using an idealized general circulation model. Our objective is to investigate whether the limited zonal extent of the AEJ is an impediment to AEW development. We construct a series of basic states using global reanalysis fields and initialize waves via transient heating over West Africa. The dominant response is a localized, near-stationary wave packet that disperses upstream and downstream. The inclusion of a crude representation of boundary layer damping stabilizes the waves in most cases, consistent with other studies in the past. In some basic states, however, exponential growth occurs even in the presence of damping. This shows that AEWs can occasionally emerge spontaneously. The key result is that, whether triggered by an external forcing or generated internally, the wave packet can remain within the AEJ for multiple wave periods instead of being swept away. Drawing from other studies, this also suggests that even the damped waves can grow if coupled with additional sources of energy such as moist convection and dust radiative feedback. The wave packet in the localized AEJ appears to satisfy a condition for absolute instability, a form of spatial hydrodynamic instability. However, this needs to be verified more rigorously. We conclude that the limited zonal extent of the AEJ is not an impediment. Our results also suggest that the intermittent nature of AEWs is mediated, not by transitions between convective and absolute instability, but likely by external sources such as propagating equatorial wave modes.

Coloration of Flowers by Flavonoids and Consequences of pH Dependent Absorption

Flavonoid pigments are key determinants of flower colors. As absorption spectra of flavonoids are known to be severely pH-dependent, cellular pH will play a crucial role in flower coloration. The flavonoids are concentrated in the vacuoles of the flowers’ epidermal cells, and thus the pigments’ absorption spectra are modulated by the vacuolar pH. Here we study the pH dependence of flavonoid absorption spectra in extracts from flowers of two poppy species Papaver dubium (red) and Meconopsis cambrica (orange), and a white and red Mandevilla sanderi variety. In the red poppy and Mandevilla flowers, absorption spectra of the cyanidin- and pelargonidin-based anthocyanins peak in the blue-green-wavelength range at low pH, but exhibit a distinct bathochromic shift at higher pH. This shift to longer wavelengths is not found for the blue-absorbing nudicaulin derivatives of M. cambrica, which have a similar absorption spectrum at low and high pH. The pH-dependent absorption changes of the white M. sanderi’s flavonoid remained restricted to the UV. An analysis of the spectra with logistic functions suggests that the pH-dependent characteristics of the basic states of flavonols and anthocyanins are related. The implications of tuning of pH and pigment absorption spectra for studies on flower color evolution are discussed.

Disruption to Embodiment in Autism, and Its Repair

This paper offers a neuroscientific explanation of life with autism which recognises that human behaviour and experience is by nature both personal and interpersonal. With a focus on insights of Penelope Dunbar (Pum) who has lived with autism for decades, we explore an affective neuroscience understanding of autistic experience and how to work creatively with its impulses for health and personal development. Pum describes her autistic disruptions to the intra-personal coherence of her basic states of being, moving-with-feeling in self-awareness, and how this disturbance to her internal subjective coherence of mind challenges her capacity to self-regulate arousal, and communicate with others. By examination of the source of her problems in childhood and ways of working with them, Pum has clarified fundamental elements in the development of her capacity to regulate self-care in creative efforts that facilitate both affective embodiment and sensory-motor coherence in growth of understanding in her mind and body. With her advice we explore how current neurobiological insights in autism as a disruption to the regulation of affective embodiment and sensory-motor integration leads to new recommendations for therapeutic care to relieve autistic distress and restricted modes of being. Although particular to her circumstances and cultivated habits of autistic expression, this analysis offers insight into the fundamental nature of autism, and ways of positive working with one’s autistic nature for creative gains.

African Easterly Waves in an Idealized General Circulation Model: Instability and Wavepacket Diagnostics

We examine the group dynamic of African easterly waves (AEW) generated in a realistic, spatially non-homogeneous African easterly jet (AEJ) using an idealized general circulation model. Our objective is to investigate whether the limited zonal extent of the AEJ is an impediment to AEW development. We construct a series of basic states using global reanalysis fields and initialize waves via transient heating over West Africa. The dominant response is a localized wavepacket that disperses upstream and downstream. The inclusion of a crude representation of boundary layer damping stabilizes the waves in most cases. In some basic states, however, exponential growth occurs even in the presence of damping. This shows that AEWs can occasionally emerge spontaneously. The key result is that the wavepacket in almost all cases remains within the AEJ instead of being swept away. Drawing from other studies, this also suggests that even the damped waves can grow if coupled with additional sources of energy such as moist convection and dust radiative feedback. The wavepacket in the localized AEJ appears to satisfy a condition for absolute instability, a form of spatial hydrodynamic instability. However, this needs to be verified more rigorously. Our results also suggest that the intermittent nature of AEWs is mediated, not by transitions between convective and absolute instability, but likely by external sources such as propagating equatorial wave modes.

A contextualist approach to emergence

What is exactly the emergence relation? In which sense is irreducibility associated with it besides being assumed by definition? Although in many cases the explanatory role of emergent states does not exceed the explanatory role of more basic states, this does not speak against the fact that, for some relevant explanatory contexts, emergent states are irreducible. On this basis, an epistemic concept of the emergence relation that does not depend strictly on irreducibility is here offered.

External labour migration: lacks of Ukrainian legal adjusting

The article investigates the state of the legal adjusting of external labour migration from Ukraine to foreign countries. Authors criticize the one-sided orientation of the Ukrainian legislation, as unjustified administrative and such that does not take into account existent realities such as politics of Poland and other recipients of foreign workers. It is not reasonable position that the Ukrainian legal doctrine approach is existing, in obedience to that for the decision of problems of this migration correct organization and clear legislative adjusting of activity of subjects of business, that engage in mediation in employment abroad, are needed. That it is really needed, so it to change a volume and maintenance of the legal adjusting of labour of citizens of Ukraine abroad in intergovernmental agreements in that one of parties there is Ukraine, and other - accepting the Ukrainian workers country. Quite another business, international agreements other, than Ukraine, countries in the sphere of labour migration. It is today possible to give an example of the successful bilateral adjusting of international labour migratory processes in some from the basic states-importers of labour force.

A New Taxonomy of Affect—A Spatiotemporal Framework: Constructing the Elephant

The holy grail of emotion theory is arguably still the discovery of a taxonomy, but one that is predicated on first establishing a corresponding structure of affect. Plans for the construction of a taxonomy are presented, based on the emotions and supported with the tripartite mind. A two-axis circumplex-like framework forms the proposed structure. The fundamental orthogonal axes are a temporal vertical axis and a spatial horizontal axis, which subsume another five essential opposing and complementary properties that underpin affect. These dimensions create four basic states that categorize affect and account for the differences and similarities between emotions within categories. A binomial labeling method posits the view that the valence of emotions is determined by the valence of the category they emanate from. The Euclidian spaces created account for mixed emotions and conditions and show how basic emotions from different categories create complex emotions and conditions. This model will also explore why some emotions like shame-embarrassment and contempt-disgust are often seen as synonyms due to a categorical error. It also provides an exposition of the function of reactive and self-reflective emotions and anxiety.

RETROSPECTIVE ANALYSIS OF USING PROJECT-BASED LEARNING IN EDUCATIONAL INSTITUTIONS OF THE USA

The article deals with analysis of historical origins, formation and development of the project method in the USA pedagogy. There have been defined main directions of implementing project learning ideas in American educational institutions in various historical periods. It also presents basic states of pragmatic pedagogy which were introduced by such representatives of American scientific school as: John Dewey, William H. Kilpatrick and Ellsworth Collings.