Catalogue Search | MBRL
Are you sure you want to remove the book from the shelf?
{{itemTitle}}
450
result(s) for
"Bipolarity"
Sort by:
A Novel Approach towards Bipolar Soft Sets and Their Applications
The notion of bipolar soft sets has already been defined, but in this article, the notion of bipolar soft sets has been redefined, called T-bipolar soft sets. It is shown that the new approach is more close to the concept of bipolarity as compared to the previous ones, and further it is discussed that so far in the study of soft sets and their generalizations, the concept introduced in this manuscript has never been discussed earlier. We have also discussed the operational laws of T-bipolar soft sets and their basic properties. In the end, we have deliberated the algebraic structures associated with T-bipolar soft sets and the applications of T-bipolar soft sets in decision-making problems.
Journal Article
The return of bipolarity in world politics : China, the United States, and geostructural realism
\"International relations scholar Oystein Tunsjo argues that the international system is transitioning to a bipolarity between the United States and China. Tunsjo develops the case for contemporary bipolarity not only by examining the current distribution of capabilities, but contends that the contemporary distribution of capabilities in the international system is roughly similar to the origins of the last bipolar system of the 1950s. Beginning with a foundation in theory, the book defines polarity and discusses how we can measure power and rank states. Tunsjo introduces three criteria for studying shifts in the distribution of capabilities among the top ranking powers: their rank based on a combined capability score derived from Kenneth Waltz's theory, the space between the second and third ranking power, and a historical comparison of the state's most recent bipolar system. With these models in place, we find that the Soviet hard-balancing seen in the Cold War is replaced by geographical conditions in the U.S.-China bipolar system to create instability and a likelihood for conflict. This is a provocative text that challenges long-held theories in the field and provides new insights on the important relationship between geography and bipolarity--in fact most of the current debates do not even consider bipolarity. Tunsjo discusses implications for the behavior of the U.S. and China and especially the effects of a new bipolar system for the dynamics of international politics\"-- Provided by publisher.
Book
Room-temperature optically detected magnetic resonance of single defects in hexagonal boron nitride
Optically addressable solid-state spins are important platforms for quantum technologies, such as repeaters and sensors. Spins in two-dimensional materials offer an advantage, as the reduced dimensionality enables feasible on-chip integration into devices. Here, we report room-temperature optically detected magnetic resonance (ODMR) from single carbon-related defects in hexagonal boron nitride with up to 100 times stronger contrast than the ensemble average. We identify two distinct bunching timescales in the second-order intensity-correlation measurements for ODMR-active defects, but only one for those without an ODMR response. We also observe either positive or negative ODMR signal for each defect. Based on kinematic models, we relate this bipolarity to highly tuneable internal optical rates. Finally, we resolve an ODMR fine structure in the form of an angle-dependent doublet resonance, indicative of weak but finite zero-field splitting. Our results offer a promising route towards realising a room-temperature spin-photon quantum interface in hexagonal boron nitride.
Optically active spins in solid-state materials hold promise for future quantum technologies. Here, the authors demonstrate optically detected magnetic resonance at room temperature for single defects in a two-dimensional material, hexagonal boron nitride.
Journal Article
Large anomalous nernst effects in two-dimensional ferromagnet Fe3GaTe2
The significant anomalous Nernst effect (ANE) in two-dimensional van der Waals magnetic materials provides potential applications for the design of novel thermoelectric devices and spintronic devices. Fe3GaTe2 is a newly discovered two-dimensional magnetic material, which has a similar structure to Fe3GeTe2 but a higher Curie temperature. In this study, we present the observation of the anomalous Hall effect (AHE) and ANE in Fe3GaTe2. It has an above-room-temperature Curie temperature of about 340K, and a Nernst thermopower of Sxy~1.2μV/K at 100K, which is much higher than those in ordinary magnets. Most importantly, the bipolarity of the AHE of Fe3GaTe2 holds the potential in thermoelectric and spintronic applications.
Journal Article
Shock Propagation and the Geometry of International Trade: The US–China Trade Bipolarity in the Light of Network Science
What is the impact of geopolitics on the geometry of global trade? What is the key structural role that led to the emergence of the US–China trade bipolarity? Here, we study the geometry of international trade, taking into account not only the direct but also the indirect trade relations. We consider the self-weight of each country as an indicator of its intrinsic robustness to exogenous shocks. We assess the vulnerability of a country to potential demand or supply shocks based on the entropy (diversification) of its trade flows. By considering the indirect trade relations, we found that the key structural role that led to the emergence of the US–China trade bipolarity is that of the intermediary hub that acts as a “bridge” between different trade clusters. The US and China occupied key network positions of high betweenness centrality as early as 2010. As international trade was increasingly dependent on only these two intermediary trade hubs, this fact led to geopolitical tensions such as the US–China trade war. Therefore, betweenness centrality could serve as a structural indicator, forewarning of possible upcoming geopolitical tensions. The US–China trade bipolarity is also strongly present in self-weights, where a race in terms of their intrinsic robustness to exogenous shocks is more than evident. It is also interesting that the US and China are not only the top shock spreaders but also the most susceptible to shocks. However, China can act more as a shock spreader than a shock receiver, while for the USA, the opposite is true. Regarding the impact of geopolitics, we found that the Russia–Ukraine conflict forced Ukraine to diversify both its exports and imports, aiming to lower its vulnerability to possible shocks. Finally, we found that international trade is becoming increasingly oligopolistic, even when indirect trade relationships are taken into account, thus indicating that a “Deep Oligopoly” has formed.
Journal Article
Centrosomal and non-centrosomal functions emerged through eliminating centrosomes
Centrosomes are highly conserved organelles that act as the major microtubule-organizing center (MTOC) in animal somatic cells. Through their MTOC activity, centrosomes play various roles throughout the cell cycle, such as supporting cell migration in interphase and spindle organization and positioning in mitosis. Various approaches for removing centrosomes from somatic cells have been developed and applied over the past few decades to understand the precise roles of centrosomes. Centrinone, a reversible and selective PLK4 (polo-like kinase 4) inhibitor, has recently emerged as an efficient approach to eliminate centrosomes. In this review, we describe the latest findings on centrosome function that have been revealed using various centrosome-eliminating approaches. In addition, we discuss our recent findings on the mechanism of centrosome-independent spindle bipolarization, discovered through the use of centrinone. Key words: centrosome, centrinone, mitotic spindle, bipolarity, NuMA
Journal Article
Interactions Between Variation in Candidate Genes and Environmental Factors in the Etiology of Schizophrenia and Bipolar Disorder: a Systematic Review
Schizophrenia and bipolar disorder (BD) are complex and multidimensional disorders with high heritability rates. The contribution of genetic factors to the etiology of these disorders is increasingly being recognized as the action of multiple risk variants with small effect sizes, which might explain only a minor part of susceptibility. On the other site, numerous environmental factors have been found to play an important role in their causality. Therefore, in recent years, several studies focused on gene × environment interactions that are believed to bridge the gap between genetic underpinnings and environmental insults. In this article, we performed a systematic review of studies investigating gene × environment interactions in BD and schizophrenia spectrum phenotypes. In the majority of studies from this field, interacting effects of variation in genes encoding catechol-
O
-methyltransferase (
COMT
), brain-derived neurotrophic factor (
BDNF
), and FK506-binding protein 5 (
FKBP5
) have been explored. Almost consistently, these studies revealed that polymorphisms in
COMT
,
BDNF
, and
FKBP5
genes might interact with early life stress and cannabis abuse or dependence, influencing various outcomes of schizophrenia spectrum disorders and BD. Other interactions still require further replication in larger clinical and non-clinical samples. In addition, future studies should address the direction of causality and potential mechanisms of the relationship between gene × environment interactions and various categories of outcomes in schizophrenia and BD.
Journal Article
Bipolar Soft Sets: Relations between Them and Ordinary Points and Their Applications
Bipolar soft set is formulated by two soft sets; one of them provides us the positive information and the other provides us the negative information. The philosophy of bipolarity is that human judgment is based on two sides, positive and negative, and we choose the one which is stronger. In this paper, we introduce novel belong and nonbelong relations between a bipolar soft set and an ordinary point. These relations are considered as one of the unique characteristics of bipolar soft sets which are somewhat expression of the degrees of membership and nonmembership of an element. We discuss essential properties and derive the sufficient conditions of some equivalence of these relations. We also define the concept of soft mappings between two classes of bipolar soft sets and study the behaviors of an ordinary point under these soft mappings with respect to all relations introduced herein. Then, we apply bipolar soft sets to build an optimal choice application. We give an algorithm of this application and show the method for implementing this algorithm by an illustrative example. In conclusion, it can be noted that the relations defined herein give another viewpoint to explore the concepts of bipolar soft topology, in particular, soft separation axioms and soft covers.
Journal Article
Discrepancy and Disliking Do Not Induce Negative Opinion Shifts
Both classical social psychological theories and recent formal models of opinion differentiation and bi-polarization assign a prominent role to negative social influence. Negative influence is defined as shifts away from the opinion of others and hypothesized to be induced by discrepancy with or disliking of the source of influence. There is strong empirical support for the presence of positive social influence (a shift towards the opinion of others), but evidence that large opinion differences or disliking could trigger negative shifts is mixed. We examine positive and negative influence with controlled exposure to opinions of other individuals in one experiment and with opinion exchange in another study. Results confirm that similarities induce attraction, but results do not support that discrepancy or disliking entails negative influence. Instead, our findings suggest a robust positive linear relationship between opinion distance and opinion shifts.
Journal Article