Near-extremal Kerr-like ECO in the Kerr/CFT Correspondence in Higher Spin Perturbations

The Kerr/CFT correspondence has been established to explore the quantum theory of gravity in the near-horizon geometry of a extreme Kerr black holes. The quantum gravitational corrections on the near-horizon region may manifest in form of a partially reflective membrane that replace the horizon. In such modification, the black holes now can be seen as a horizenless exotic compact object (ECO). In this paper, we consider the properties of Kerr-like ECOs in near-extremal condition using Kerr/CFT correspondence. We study the quasinormal modes and absorption cross-section in that background and compare these by using CFT dual computation. The corresponding dual CFT one needs to incorporate finite size/finite $N$ effects in the dual CFT terminology. We also extend the dual CFT analysis for higher spin perturbations such as photon and graviton. We find consistency between properties of the ECOs from gravity sides and from CFT sides. The quasinormal mode spectrum is in line with non-extreme case, where the differences are in the length of the circle, on which the dual CFT lives, and phase shift of the incoming perturbation. The absorption cross-section has oscillatory feature that start to disappear near extremal limit. The particle spin determines the phase shift and conformal weight. We also obtain that the echo time-delay depends on the position of the membrane and extremality of the ECOs.Comment: 13 pages, 5 figures, for submission to journa

MULTI-SCENARIO SPATIAL MODELING OF HEALTH FACILITIES DEVELOPMENT TO SUPPORT THE ACHIEVEMENT OF UNIVERSAL HEALTH COVERAGE

The availability of health facilities that the community can easily reach is one way to improve the degree of health of residents in a region. The ratio of the number of health facilities and residents in Indonesia is currently only about 1:11000. In addition, the equalization of health facilities in Indonesia is also reasonably uneven because the number of health facilities is more centralized in Java, Indonesia. The transfer of the New Capital of Indonesia launched in 2024 to the island of Kalimantan makes Kalimantan Island a magnet for new people's lives, so it needs to be considered infrastructure development, especially in the health sector. This research attempts to model the conformity of health facilities development on the island of Kalimantan spatially by considering the aspect of accessibility as support and comfort and disaster aspects as a barrier. The accessibility aspect will consider geographical and social criteria, the comfort aspect will consider the criteria for air pollution and noise pollution, and the disaster aspect will consider the criteria for floods, landslides, and forest fires. The integration of Geographic Information Systems and Remote Sensing Technology will be carried out using Multi-Criteria Decision Analysis (MCDA). This study will produce recommendations for the appropriate area for the construction of health facilities on the island of Kalimantan. This study is expected to be a consideration for authorized parties in planning health facilities on the island of Kalimantan in preparation for becoming the Capital of the New Country in Indonesia

Human Capital Development and Parental Investment in India

In this paper we estimate production functions for cognition and health throughout four stages of childhood from 5-15 years of age using two cohorts of children drawn from the Young Lives Survey for India. The inputs into the production function include parental background, prior child cognition and health and child investments. We allow investments to be endogenous and they depend on local prices and household income, as well as on the exogenous determinants of cognition and health. We find that investments are very important determinants of child cognition and of health at an earlier age. We also find that inputs are complementary and crucially that health is very important in determining cognition. Our paper contributes in understanding how early health outcomes are important in child development

Hygiene, Sanitation, and Water: Forgotten Foundations of Health

As the first article in a four-part PLoS Medicine series on water and sanitation, Jamie Bartram and Sandy Cairncross argue that the massive burden of ill health associated with poor hygiene, sanitation, and water supply demands more attention from health professionals and policymakers

Capital structure of Islamic banks: a critical review of theoretical and empirical research

Purpose: This paper aims to critically evaluate theoretical and empirical research into capital structure practices in Islamic banks (IBs) from four perspectives, namely, theoretical aspect and its nature, determinants of capital structure in IBs, links between capital structure and risk management and nexus between capital structure and performance of IBs. Design/methodology/approach: The authors will review and examine past studies on IBs’ capital structure from both theoretical and empirical research. Findings: The paper concludes that most of the literature on IB capital structure is largely theoretical than empirical. The existing studies on IB capital structure have various limitations, which suggest a need for detailed empirical work. Detailed empirical research in the field of capital structure will support bank managers and policymakers in making decisions about improving capital structure. Originality/value: This research will make several noteworthy contributions to address literature gaps for IB capital structure. Furthermore, this paper will identify areas for future research into capital structure practices and IB financing decisions. Lastly, this paper will equip regulators with guidelines for establishing sound capital requirements for IB