This study describes a new variety of chalcedony with a unique inhomogeneous bluish green hue, named aquaprase. It was discovered in Africa and is considered to be a valuable addition to the gem trade. A multi-methodological approach was used to examine its chemistry, mineralogy and microstructure, which were then compared to those of chrysoprase and agate, two of the most popular varieties of chalcedony. Optical microscopy revealed a complex microstructural heterogeneity in the different colour intensity areas/bands of aquaprase and agate, whereas chrysoprase exhibited a more homogeneous coexistence of micro- and cryptocrystalline quartz. High-resolution synchrotron XRD was essential for highlighting the complex assemblage of various types of α-quartz in aquaprase and agate (which differ in terms of crystal size and/or cell parameters). Micro-Raman spectroscopy revealed α-quartz and moganite in all three varieties of chalcedony and the presence of the nickel-bearing layered silicate mineral, willemseite, in chrysoprase, which is responsible for its green colouration. The chemical analysis displayed a homogeneous composition of agate, as well as high levels of nickel content in the chrysoprase variety. Aquaprase showed significant amounts (ppm by weight) of trace elements (Al, Mg, Na, K, Ca, Ti, U and Fe) characteristic of its formation environment, as well as high values of Cr, which are thought to be the cause of its bluish green colouration.

In recent decades, the term “politics” has become almost synonymous with conflict. Results from eight studies show that individuals averse to conflict tend to select out of surveys and discussions explicitly labeled as “political.” This suggests that the inferences researchers draw from “political” surveys, as well as the impressions average Americans draw from explicitly “political” discussions, will be systematically biased toward conflict. We find little evidence that these effects can be attenuated by emphasizing deliberative norms. However, conflict averse individuals are more willing to discuss ostensibly political topics such as the economy, climate change, and racial inequality, despite reluctance to discuss “politics” explicitly. Moreover, they express greater interest in politics when it is defined in terms of laws and policies and debate is deemphasized. Overall, these findings suggest the expectation of conflict may have a self-fulfilling effect, as contexts deemed explicitly “political” will be composed primarily of conflict seekers.

The objective of the article is to establish why a financial bonus for Slovenian–Italian bilingualism was introduced in the District of Koper (comprising today’s Slovenian municipalities of Ankaran, Koper, Izola and Piran), which came under Yugoslav rule after 1954. Using Brubaker’s triadic nexus concept and analysis of newly discovered archival sources, the authors found that (a) on the federal level, Yugoslavia only focused on minority protection as much as it was required to by international agreements and treaties, (b) the Italian minority itself was not a relevant actor in the Yugoslav system of minority protection, (c) Italy had a marginal role in the process of protecting the Italian minority in Yugoslavia, and (d) the political elite in Yugoslavia introduced the bilingualism bonus to encourage the integration of the Italian minority when building a new (socialist) sociopolitical order. The Slovenian-Italian bilingualism bonus was therefore not an altruist measure directed at minority protection, but rather a self-serving measure by the authorities to reinforce their power.

Whereas emerging market firms (EMFs) face severe legitimacy barriers when entering global markets, whether and under what conditions green innovation can help them gain legitimacy remains under-examined. This article argues that green innovation can help EMFs obtain regulatory and social legitimacy in host countries and consequently boost their exports. Based on a panel dataset populated by 254 Chinese-listed manufacturing companies from 2011 through 2017, this article finds that green innovation is positively associated with EMF export performance. Moreover, this positive relationship is stronger when host-country political risk is lower or host-country buyer sophistication is higher but becomes weaker for state-owned EMFs. These findings enrich the legitimacy-based view and international business literature by identifying the role of green innovation in boosting EMF export performance and specifying important institutional contingencies.

In the proposed paper, a novel design and realization of a wide-band, oblique angle-insensitive metamaterial absorbers are presented. The absorber is designed to work over a wide range of frequencies, making it suitable for Ku-band applications. To get wide band absorption, a novel SM-shaped design with a square-tooth circular ring resonator structure is designed efficiently. The unit cell structure is designed with a dielectric substrate (FR4) with a thickness of 3.2 mm (0.16λ0), where λ0 is the wavelength of free space. The novel design of this configuration leads to wideband absorption with respect to a conventional absorber. Several physical parameters are also investigated, such as the dielectric constant, permittivity, permeability, impedance, and negative refractive index. The simulation and experimental results show from 13.60 to 16.14 GHz with 99.1% absorption, which is excellent agreement. The analysis of the proposed design indicates that it possesses the remarkable feature of being insensitive to polarization while also exhibiting high absorption even when the angle of incidence varies. For both the simulation and experiment, results are consistent with a frequency range of 13.60–16.14 GHz for normal incidence. Almost perfect absorption works well for solar cells, EM detection, and imaging applications.

On June 1, 2020, a little more than two months after the World Health Organization’s COVID-19 pandemic declaration, our editorial team assumed the leadership of the American Political Science Review (APSR). Although this confluence of events makes it difficult to isolate the pandemic’s effect on new submissions and review processes, this article describes submission and review patterns in the two and a half years before and after the onset of the pandemic and the editorial transition. It describes our preliminary observations regarding what the patterns suggest about the pandemic’s impact on the APSR.1

We show that the universal theory of the hyperfinite II$_1$ factor is not computable. The proof uses the recent result that MIP*=RE. Combined with an earlier observation of the authors, this yields a proof that the Connes Embedding Problem has a negative solution that avoids the equivalences with Kirchberg’s QWEP Conjecture and Tsirelson’s Problem.

A novel wideband reflectarray antenna (RA) is designed for 5G millimeter (mm) wave communications in the frequency range of 26.5–36 GHz. The proposed unit cell is constructed using a grid periodicity of 0.52${{\lambda }_0}{ }$ that offers 636° phase change through phase delay lines (PDLs) (${{\theta }_{\text{s}}}$). These PDLs are attached to the outer end of the unit cell comprising semi-circular rings. Bandwidth enhancement is achieved by incorporating a corrugated slot technique and a suitable air gap beneath the substrate. The proposed center-fed reflectarray is composed of 513 elements distributed in a circular aperture (13.46${{\lambda }_0}$). Using mirror-symmetrical distribution of the unit cells, a cross-polarization reduction as low as −50 dB is realized. At 30 GHz, RA has a measured peak gain of 28.2 dBi, a sidelobe level of −14.3 dB, and an aperture efficiency of 31.4%. The prototype antenna is fabricated, and the simulation results are experimentally validated. The measured 1-dB and 3-dB gain bandwidths of the proposed reflectarray antenna are 31.3% and 41.6%, respectively. The proposed broadband reflectarray can be a potential choice for inter-satellite services like inter-satellite networking/satellite positioning and control; fixed satellite services such as GPS satellite synchronization and data direct to home TV; and satellite position fixing.

In this article, I examine the ROC president's discursive response to PRC efforts to limit Taiwan's future possibilities and undermine confidence in Taiwan's future. I argue that the capacity to imagine the future, and perceiving agency to affect future outcomes, is crucial for national resilience. Since Taiwan is routinely exposed to factors known to cause reduced self-efficacy and morale – uncertainty, threat, marginalization, restricted agency, circumscribed action repertoires – it is crucial that Taiwanese people have a meaningful sense of “what are we striving for?” and confidence that they have the agency to realize these aspirations. The article sets out an empirical examination of discursive constructions of the future as a vector for enhancing cohesion and resolve in Taiwanese society. Foregrounding a novel dimension in the study of Taiwan, the article contributes both an interpretivist account of President Tsai Ing-wen's discourse and opens a new avenue for research on the largely neglected issue of futurity in cross-Strait relations.

The literature on green tea consumption and glucose metabolism has reported conflicting findings. This cross-sectional study examined the association of green tea consumption with abnormal glucose metabolism among 3000 rural residents aged 40–60 years in Khánh Hòa province in Vietnam. Multinomial logistic regression analysis was conducted to examine the association of green tea consumption (0, < 200, 200–< 400, 400–< 600 or ≥ 600 ml/d) with prediabetes and diabetes (based on the American Diabetes Association criteria). Linear regression analysis was performed to examine the association between green tea consumption and the log-transformed homeostatic model assessment of insulin resistance (HOMA-IR) (a marker of insulin resistance) and the log-transformed homeostatic model assessment of β-cell function (HOMA-β) (a marker of insulin secretion). The OR for prediabetes and diabetes among participants who consumed ≥ 600 ml/d v. those who did not consume green tea were 1·61 (95 % CI = 1·07, 2·42) and 2·04 (95 % CI = 1·07, 3·89), respectively. Higher green tea consumption was associated with a higher level of log-transformed HOMA-IR (Pfor trend = 0·04) but not with a lower level of log-transformed HOMA-β (Pfor trend = 0·75). Higher green tea consumption was positively associated with the prevalence of prediabetes, diabetes and insulin resistance in rural Vietnam. The findings of this study indicated prompting the need for further research considering context in understanding the link between green tea consumption and glucose metabolism, especially in rural settings in low- and middle-income countries.

Print created the urge to innovate new modalities of musical knowledge production and dissemination in nineteenth-century Bengal. Publication of music books made the bifurcation between music theory and practice clearer, but only as a textual category. As the literature suggests, these were two categories for organizing musical knowledge, intimately entwined, where one produces the other and also doesn't exist without each other. The technology of ‘swaralipi’ (musical notation) used in the modern printed books materialized the project of disseminating music to the reader who could now ‘read’ the music from the book. For some book writers, music books were meant to be a replacement for the oral tutelage, published as ‘self-instructors’. But, on the contrary, the most prolific book-writers of the time used their books as the basis of oral tutelage in the music school. In the modern setting of the music school, the person of the ‘guru’ or ‘ustad’ was replaced by the formalized, systematic teaching of the ‘professors’ of music. Music books, as the medium of modern music pedagogy, thus changed not only the way students learned – making it possible to learn from the book with no instructor – but also the role of teachers, whose teaching was validated by the book. The music books came to function as the ‘modern shastras’ – to exercise regulatory authority over music practice, and how music is learned and taught. The ‘orality’ of music emerges as a liminal space in the gap between the writings on music and the writing of music. What emerges is an unlikely milieu where a new form of musical education is devised, the possibility of an education without a guru is conceived, and the schema of musical notation brings the entire process to life.

In July 1979, the Sunday Mirror published an article with the headline: “HOSPITALS AT CRISIS POINT: Jobs and beds to go in cash curbs.” In this article we explore the role of hospital beds in such public discussions of “crisis” within the British National Health Service (NHS). In the 1970s, the media and politicians paid increasing attention to bed numbers as an indicator of resource scarcity within the NHS. While this in part reflected a genuine trend, it was also a powerful narrative device. The hospital bed has become a cipher for NHS resourcing and resilience, but throughout the twentieth century, there has been a tension between stories of declining bed numbers as a sign of “crisis,” and declining bed numbers as a marker of more efficient, high-quality healthcare. This article will show that the hospital bed was an extremely important political device because it was imbued with rich social and cultural symbolism, and that stories of declining bed numbers were not as straightforward as they first appear. While discussions in the public sphere tended to focus on bed numbers and waiting times, discussions in the healthcare sector and among policymakers attended to what beds could—and should—do for both patients and staff. Public rhetoric about decline was less about the object itself, and more about the role of the hospital bed as a symbol of care and as a politically pertinent shorthand for the health of the NHS as an institution.

Dodecyl dimethyl benzyl ammonium (DDBA) is a novel cation surfactant used to modify clay minerals. DDBA-intercalated montmorillonite is formed by the ion exchange between DDBA cations in the solution and cations in the montmorillonite interlayers. By using molecular dynamics simulations, we investigated the basal spacings, interlayer structures and dynamics of DDBA-montmorillonites. The results showed that the calculated basal spacings agreed well with experimental values and that the layering behaviours of DDBA had been revealed. The ammonium groups of DDBA ions preferred staying close to the centre of Si–O six-member rings. The benzyl group and lauryl group were oriented in parallel in the monolayer state, whereas they were tilted in other states. DDBA ions have very low mobility in the interlayer region, indicating that the negatively charged montmorillonite surfaces can effectively fix this positively charged surfactant. The microscopic structures and dynamics obtained in the present study provide atomic-scale insights into the properties of DDBA-intercalated clay minerals.

This article breaks new ground in its portrayal of the process through which a private research university obtained foundation funding. Stanford University’s growth spurts after World War I and World War II were significantly enabled by financial support from the foundations of Carnegie, Rockefeller, and Ford. The process leading to Stanford’s receiving major grants primarily involved interactions among a small group of individuals and reflected the confidence of foundation presidents and other top administrators in the capacity of the university’s presidents and other leaders. The significance of such high-level interaction persisted even while major foundations professionalized, shifting responsibilities from trustees to staff. In the rendezvous between Stanford University and philanthropic foundations, these relationships mattered so much that at crucial junctures, funding to the university preceded expertise in the relevant field of study.