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PubMed Journals Articles About "Digging Into Black Hole Research" RSS

17:20 EDT 24th June 2019 | BioPortfolio

Digging Into Black Hole Research PubMed articles on BioPortfolio. Our PubMed references draw on over 21 million records from the medical literature. Here you can see the latest Digging Into Black Hole Research articles that have been published worldwide.

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Showing "Digging Into Black Hole Research" PubMed Articles 1–25 of 25,000+

Distinguishing Black Hole Microstates using Holevo Information.

We use Holevo information in the two-dimensional conformal field theory (CFT) with a large central charge c to distinguish microstates from the underlying thermal state. Holographically, the CFT microstates of a thermal state are dual to black hole microstate geometries in anti-de Sitter space. It was found recently that holographic Holevo information shows plateau behaviors at both short and long interval regions. This indicates that the black hole microstates are indistinguishable from the thermal state b...


Decoding the Apparent Horizon: Coarse-Grained Holographic Entropy.

When a black hole forms from collapse in a holographic theory, the information in the black hole interior remains encoded in the boundary. We prove that the area of the black hole's apparent horizon is precisely the entropy associated with coarse graining over the information in its interior, subject to knowing the exterior geometry. This is the maximum holographic entanglement entropy that is compatible with all classical measurements conducted outside of the apparent horizon. We identify the boundary dual...

Corrigendum: Digging the Sigma-Hole of Organoantimony Lewis Acids by Oxidation.


First-Principles Plasma Simulations of Black-Hole Jet Launching.

Black holes drive powerful plasma jets to relativistic velocities. This plasma should be collisionless, and self-consistently supplied by pair creation near the horizon. We present general-relativistic collisionless plasma simulations of Kerr-black-hole magnetospheres which begin from vacuum, inject e^{±} pairs based on local unscreened electric fields, and reach steady states with electromagnetically powered Blandford-Znajek jets and persistent current sheets. Particles with negative energy at infinity ar...

Preferential hand use by captive chimpanzees (Pan troglodytes) in manual and tool digging.

Digging for underground storage organs of plants has been reported in various populations of wild chimpanzees (Pan troglodytes). However, it is unknown so far whether chimpanzees display lateral biases in manual digging as direct observations of this behavior are still lacking. It was therefore the aim of the present study to assess, for the first time, hand preferences for digging in a group of nine captive chimpanzees. We found that with only one exception, all individuals engaged in manual digging for bu...

Gravitational Waves in Massive Gravity Theories: Waveforms, Fluxes, and Constraints from Extreme-Mass-Ratio Mergers.

Is the graviton massless? This problem was addressed in the literature at a phenomenological level, using modified dispersion relations for gravitational waves, in linearized calculations around flat space. Here, we perform a detailed analysis of the gravitational waveform produced when a small particle plunges or inspirals into a large nonspinning black hole. Our results should presumably also describe the gravitational collapse to black holes and explosive events such as supernovae. In the context of a th...

Brief Report: Participation of Black and African-American Families in Autism Research.

Black and African-American families are underrepresented in research on autism spectrum disorder (ASD) and few studies have explored how to increase their involvement. To address this gap in the literature, this study explored the perspectives of 22 Black families raising children with ASD in order to identify facilitators and barriers to research participation; as well as suggestions to increase their involvement in ASD studies. Facilitators to research involvement included a desire to contribute to ASD re...

Anisotropies in the Astrophysical Gravitational-Wave Background: The Impact of Black Hole Distributions.

We use population inference to explore the impact that uncertainties in the distribution of binary black holes (BBH) have on the astrophysical gravitational-wave background (AGWB). Our results show that the AGWB monopole is sensitive to the nature of the BBH population (particularly the local merger rate), while the anisotropic C_{ℓ} spectrum is only modified to within a few percent, at a level which is insignificant compared to other sources of uncertainty (such as cosmic variance). This is very promisin...

Novel burr hole dilator for endoscopic surgery for intracranial hemorrhagic lesion: technical note.

When performing burr hole endoscopic neurosurgery, it is necessary to get enough surgical corridor. We have used various instrument extending burr hole size, it was cumbersome to use many tools. In this report, we describe developed novel instruments that burr hole dilator attachment and cordless handle with simple and safe to extend a burr hole.

Exploring problematic internet use among non-latinx black and latinx youth using the problematic internet use questionnaire-short form (PIUQ-SF).

Non-Latinx black and Latinx youth have reported more frequent Internet use compared to White youth, yet problematic Internet use among these groups of youth remains underexplored. This study aimed to validate the Problematic Internet Use Questionnaire-Short Form (PIUQ-SF) and investigate the characteristics of problematic Internet use among non-Latinx black and Latinx youth. Cross-sectional data were collected from a convenience sample of 235 high school students in Southeastern Florida (Mean Age = 16.1...

Tracking Black Hole Kicks from Gravitational-Wave Observations.

Coalescing binary black holes emit anisotropic gravitational radiation. This causes a net emission of linear momentum that produces a gradual acceleration of the source. As a result, the final remnant black hole acquires a characteristic velocity known as recoil velocity or gravitational kick. The symmetries of gravitational wave emission are reflected in the interactions of the gravitational wave modes emitted by the binary. In this Letter, we make use of the rich information encoded in the higher-order mo...

Piezoelectric Drilling Hole Technique in Septal Fixation.

The act of securing the septum to the midline is very important for the success of the operation during septoplasty and septorhinoplasty operations. The authors' aim in this study is to open a hole in the anterior nasal spine with the Piezoelectric drilling hole technique so as to fix the septum to the midline with a suture passing through that hole.

Comparison of σ-/π-Hole Tetrel Bonds between TH3F/F2TO and H2CX (X = O, S, Se).

The σ-hole and π-hole tetrel-bonded complexes with a base H2CX (X = O, S, Se) have been studied, in which TH3F (T = C-Pb) and F2TO (T = C and Si) act as the σ-hole and π-hole donors, respectively. Generally, these complexes are combined with a primary tetrel bond and a weak H-bond. Only one minimum tetrel-bonded structure is found for TH3F, whereas two minima tetrel-bonded complexes for some F2TO. H2CX is favorable to engage in the π-hole complex with F2TO relative to TH3F in most cases, and this prefe...

Mechanical similarity across ontogeny of digging muscles in an Australian marsupial (Isoodon fusciventer).

Many mammals dig, either during foraging to access subsurface food resources, or in creating burrows for shelter. Digging requires large forces produced by muscles and transmitted to the soil via the skeletal system; thus fossorial mammals tend to have characteristic modifications of the musculoskeletal system that reflect their digging ability. Bandicoots (Marsupialia: Peramelidae) scratch-dig mainly to source food, searching for subterranean food items including invertebrates, seeds, and fungi. They have ...

False-positive mammography and mammography screening intentions among black women: the influence of emotions and coping strategies.

Abnormal mammograms confirmed as benign are known as false-positive mammography (FPM) results. Research indicates that a history of FPM results may be linked to diagnostic delays in Black women, yet much of the research on FPM has focused on White women.

High-Accuracy Mass, Spin, and Recoil Predictions of Generic Black-Hole Merger Remnants.

We present accurate fits for the remnant properties of generically precessing binary black holes, trained on large banks of numerical-relativity simulations. We use Gaussian process regression to interpolate the remnant mass, spin, and recoil velocity in the seven-dimensional parameter space of precessing black-hole binaries with mass ratios q≤2, and spin magnitudes χ_{1}, χ_{2}≤0.8. For precessing systems, our errors in estimating the remnant mass, spin magnitude, and kick magnitude are lower than th...

Pre-exposure prophylaxis initiation and adherence among Black men who have sex with men (MSM) in three US cities: results from the HPTN 073 study.

Randomized clinical trials have demonstrated the efficacy of antiretroviral pre-exposure prophylaxis (PrEP) in preventing HIV acquisition among men who have sex with men (MSM). However, limited research has examined initiation and adherence to PrEP among Black MSM (BMSM) in the United States (US) who are disproportionately represented among newly HIV infected and late to care individuals. This research reports on the HIV Prevention Trials Network 073 (HPTN 073) study aimed to examine PrEP initiation, utiliz...

A Person-Centered Approach to the Study of Black Adolescent Religiosity, Racial Identity, and Sexual Initiation.

Decreasing the number of adolescents who have never had sexual intercourse is one way to address sexual health disparities. We used intersectionality to explore the joint effects of religiosity and racial identity on Black adolescent sexual initiation. Data originated from the National Survey of American Life-Adolescent (n = 1,170), a nationally representative study of Black adolescents. Latent profile analysis and survival analysis were used to evaluate study hypotheses. Results showed four distinct prof...

Two-dimensional black phosphorus: its fabrication, functionalization and applications.

Phosphorus, one of the most abundant elements in the Earth (∼0.1%), has attracted much attention in the last five years since the rediscovery of two-dimensional (2D) black phosphorus (BP) in 2014. The successful scaling down of BP endows this 'old material' with new vitality, resulting from the intriguing semiconducting properties in the atomic scale limit, i.e. layer-dependent bandgap that covers from the visible light to mid-infrared light spectrum as well as hole-dominated ambipolar transport character...

Black Nurse Leaders in the Canadian Healthcare System.

This article highlights a growing gap in the Canadian nursing workforce, specifically in nursing leadership. Black nurses are significantly underrepresented in nursing and even more so as nurse leaders. This commentary will provide a brief background related to Black nurses in healthcare, a description of nursing leadership, the significance of having Black nurses in leadership positions and finally how to move towards increasing the representation and visibility of Black nurse leaders. This commentary is t...

'Man in the driving seat': a grounded theory study of the psychosocial experiences of Black African and Black Caribbean men treated for prostate cancer and their partners.

Evidence suggests that treatment side-effects of prostate cancer (CaP) substantially affect the psychosocial well-being of affected men and their partners. However, this phenomenon is poorly understood among high risk (1 in 4) Black African (BA)/Black Caribbean (BC) men and their partners as they are currently under-represented in global research on CaP survivorship. This study explored the psychosocial experiences of BA/BC men with CaP and their partners in the United Kingdom as they lived through the side...

Recent advances of black TiO2 for production of hydrogen and other solar fuels Athanasios Chatzitakis,b and Sabrina Sartori*a.

Black TiO2 has emerged as one of the most promising photocatalysts recently discovered. The reason behind its catalytic activity is considered to be due to the presence of defects and Ti3+ species at the surface of black TiO2 nanostructures, which are crucial for its diverse applications. Moreover, disordered/crystalline surface layers and bulk regions have been identified and appear to influence the intrinsic properties of the material. Here, we present the latest studies on the use of black TiO2 for metal...

(Isocyano Group π-Hole)···dz2-MII Interactions at (Isocyanide)MII Complexes, where Positively Charged Metal Centers (d8M = Pt, Pd) Act as Nucleophiles.

Inspection of the X-ray structures of the newly prepared trans-[MII(CNXyl)2(DAPT)2]Cl(BF4) (M = Pd, Pt; Xyl = 2,6-Me2C6H3; DAPT = 4,6-diaminopyrimidine-2(1H)-thione) complexes and the appropriate Hirshfeld molecular surface analysis allowed the recognition of the previously unknown π-hole···metal interactions between a ligated isocyano group (acting as a π-hole donor) and the positively charged d8-PtII and d8-PdII metal centers (acting as nucleophiles); this is the first identification of π-hole···...

Preventive Effects by Black Raspberries of Endometrial Carcinoma Initiation and Promotion Induced by a High-Fat Diet.

The chemopreventive effects of black raspberries (BRBs) have not been studied in endometrial tumorigenesis. Here, we examine them in a mouse model of endometrial cancer.

Facile synthesis of Pt-decorated Ir black as a bifunctional oxygen catalyst for oxygen reduction and evolution reactions.

Pt-Decorated Ir black (Pt@Ir) nanoparticles with two varying Pt mass fractions (Pt4@Ir96 and Pt16@Ir84) were generated by a facile method in water with the aid of Ir black. The Pt@Ir nanoparticles were investigated as a bifunctional oxygen catalysts for both the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) in acidic medium. Benefiting from the good dispersion of ultrafine Pt nanodots on the Ir black surface and the synergistic effect between the Pt and underlying Ir atoms, Pt@Ir nanop...


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