Sagnac delay in the Kerr-dS space-time: Implications for Mach's principle

Relativistic twin paradox can have important implications for Mach's principle. It has been recently argued that the behavior of the time asynchrony (different aging of twins) between two flying clocks along closed loops can be attributed to the existence of an absolute spacetime, which makes Mach's principle unfeasible. In this paper, we shall revisit, and support, this argument from a different viewpoint using the Sagnac delay. This is possible since the above time asynchrony is known to be exactly the same as the Sagnac delay between two circumnavigating light rays re-uniting at the orbiting source/receiver. We shall calculate the effect of mass $M$ and cosmological constant $\Lambda$ on the delay in the general case of Kerr-de Sitter spacetime. It follows that, in the independent limits $M\rightarrow 0$, spin $a\rightarrow 0$ and $\Lambda\rightarrow 0$, while the Kerr-dS metric reduces to Minkowski metric, the clocks need not tick in consonance since there will still appear a non-zero observable Sagnac delay. While we do not measure spacetime itself, we do measure the Sagnac effect, which signifies an absolute substantive Minkowski spacetime instead of a void. We shall demonstrate a completely different limiting behavior of Sagnac delay, heretofore unknown, between the case of non-geodesic and geodesic source/observer motion.Comment: 15 pages. arXiv admin note: text overlap with arXiv:1709.0841

Modern information technologies as a tool for reducing working population poverty

Rapid development and implementation of modern information and communication technologies has led to a new phase of economic, scientific and technological progress. However, there is no mechanism to ensure social systems effective management based on the information technologies use due to socio-economic inequality among the population of the Russian Federation, preventing all segments of the population from benefiting scientific and technological progress results, which has been exacerbated by the COVID-19 pandemic. The aim of the study is to identify the modern information technologies role in improving the living standard and the population life quality, in particular, in overcoming the working population poverty. The article analyses foreign and domestic research on this issue over the past five years. The pandemic impact on social structures, in particular the labour market and employment, has been considered. The growing importance and social networks role in public life and their use serious potential to solve the problems under study have been noted. The authors carried out a sociological survey in the Republic of Bashkortostan, on the basis of which made conclusions: modern society is characterised by the information inequality problem, which is closely linked to the economic inequality problem, which will be exacerbated by the modern information and communication technologies development; the computer illiteracy problem and the close relationship between income level and knowledge, skills in information and communication technologies, English language skills were identified among residents. The research results highlight the need to implement modern information technologies skills into poverty alleviation programmes

An Optical and Infrared Photometric Study of the Young Open Cluster IC 1805 in the Giant H II Region W4

We present deep wide-field optical CCD photometry and mid-infrared Spitzer/IRAC and MIPS 24micron data for about 100,000 stars in the young open cluster IC 1805. The members of IC 1805 were selected from their location in the various color-color and color-magnitude diagrams, and the presence of Halpha emission, mid-infrared excess emission, and X-ray emission. The reddening law toward IC 1805 is nearly normal (R_V = 3.05+/-0.06). However, the distance modulus of the cluster is estimated to be 11.9+/-0.2 mag (d = 2.4+/-0.2 kpc) from the reddening-free color-magnitude diagrams, which is larger than the distance to the nearby massive star-forming region W3(OH) measured from the radio VLBA astrometry. We also determined the age of IC 1805 (tau_MSTO = 3.5 Myr). In addition, we critically compared the age and mass scale from two pre-main-sequence evolution models. The initial mass function with a Salpeter-type slope of Gamma = -1.3+/-0.2 was obtained and the total mass of IC 1805 was estimated to be about 2700+/-200 M_sun. Finally, we found our distance determination to be statistically consistent with the Tycho-Gaia Astrometric Solution Data Release 1, within the errors. The proper motion of the B-type stars shows an elongated distribution along the Galactic plane, which could be explained by some of the B-type stars being formed in small clouds dispersed by previous episodes of star formation or supernova explosions.Comment: 45 pages, 32 figures, 9 tables, accepted for publication in ApJ

The New White Flight

White charter school enclaves—defined as charter schools located in school districts that are thirty percent or less white, but that enroll a student body that is fifty percent or greater white— are emerging across the country. The emergence of white charter school enclaves is the result of a sobering and ugly truth: when given a choice, white parents as a collective tend to choose racially segregated, predominately white schools. Empirical research supports this claim. Empirical research also demonstrates that white parents as a collective will make that choice even when presented with the option of a more racially diverse school that is of good academic quality. Despite the connection between collective white parental choice and school segregation, greater choice continues to be injected into the school assignment process. School choice assignment policies, particularly charter schools, are proliferating at a substantial rate. As a result, parental choice rather than systemic design is creating new patterns of racial segregation and inequality in public schools. Yet the Supreme Court’s school desegregation jurisprudence insulates racial segregation in schools ostensibly caused by parental choice rather than systemic design from regulation. Consequently, the new patterns of racial segregation in public schools caused by collective white parental choice largely escapes regulation by courts. This article argues that the time has come to reconsider the legal and normative viability of regulating racial segregation in public schools caused by collective white parental choice. The article makes two important contributions to the legal literature on school desegregation. First, using white charter school enclaves as an example, it documents the ways in which school choice policies are being used to allow whites as a collective to satisfy their preference for segregated predominately white schools. Second, the article sets forth both constitutional and normative arguments for regulating the private choices that result in stark racial segregation patterns in public schools

Labor capital development of the region in the focus of sociological research: factors and problems

The presented work analyzes the features, problems and factors of labor capital development of the Republic of Bashkortostan based on the data of a sociological study conducted by the Institute for Socio-Economic Research of the Ufa Federal Research Center of the Russian Academy of Sciences in 2021. A number of problems faced by the able-bodied population are considered, including: a relatively low standard of living of the population, which hinders the provision of the quality of life and professional productivity of workers; gender inequality in the distribution of labor incomes of the population; the predominance of negative assessments of the able-bodied population of their physical condition, the quality of their leisure and vacations; discrepancy between the high qualification of employees and the functions performed, which does not allow them to fully realize their labor potential in the workplace. Particular attention is paid to the analysis of values that prevail in the minds of the able-bodied population and determine their labor behavior, and as a result, have a negative impact on the formation of labor capital. Thus, it was revealed that the value orientations of the population of the Republic of Bashkortostan are typical for countries of “catching up” development. In this regard, the authors substantiate the necessity of cultivating the values of rationality of financial thinking, equality, self-expression and autonomy, as well as improving institutions that support these values in society. These values act as factors in the formation of high-quality labor capital in the conditions of modern Russi

Myth in the structure of national consciousness

In the context of globalization processes, the problem of nations and national selfconsciousness has become one of the most widely discussed in the modern social sciences and humanities. Within the framework of globalization approaches, a nation is viewed as a transitional formation between traditional locality and planetary interdependence. According to modern theories, the model of a nation is built on the basis of Western European developmental patterns. From such viewpoint, the characterization of ethnicity is rejected, as a feature of “primitive”, “pre-political” societies as marginal groups doomed to assimilation into the existing structures. The central problem of ethnical belonging is the issue of origin, the restoration of cultural and historical memory and the construction of the “appropriate past”, which would assist in solving the problems of the present. The core of any national culture is national-ethnic self-consciousness which is the key factor in the national identity formation. It is pointed out that certain types of myths are inseparable from the ethnic identity. Today, researchers speak of the process of “remythologization”. For Russia, which has always been a multiethnic state, the problem of scientific definition of nations, ethnic groups, national and ethnic consciousness has a special practical significance. In Russia and the post-Soviet space, the activation of mythological thinking has its own specifics.Keywords: Nations, Ethnicity, National consciousness, Myth, Globalizatio

The Angstrom Project Alert System: real-time detection of extragalactic microlensing

The Angstrom Project is undertaking an optical survey of stellar microlensing events across the bulge region of the Andromeda Galaxy (M31) using a distributed network of two-meter class telescopes. The Angstrom Project Alert System (APAS) has been developed to identify in real time candidate microlensing and transient events using data from the Liverpool and Faulkes North robotic telescopes. This is the first time that real-time microlensing discovery has been attempted outside of the Milky Way and its satellite galaxies. The APAS is designed to enable follow-up studies of M31 microlensing systems, including searches for gas giant planets in M31. Here we describe the APAS and we present a few example light curves obtained during its commissioning phase which clearly demonstrate its real-time capability to identify microlensing candidates as well as other transient sources.Comment: 4 pages, submitted to ApJ Letter