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https://www.readbyqxmd.com/read/27914419/multi-objective-optimization-of-acoustic-black-hole-vibration-absorbers
#1
Micah R Shepherd, Philip A Feurtado, Stephen C Conlon
Structures with power law tapers exhibit the acoustic black hole (ABH) effect and can be used for vibration reduction. However, the design of ABHs for vibration reduction requires consideration of the underlying theory and its regions of validity. To address the competing nature of the best ABH design for vibration reduction and the underlying theoretical assumptions, a multi-objective approach is used to find the lowest frequency where both criteria are sufficiently met. The Pareto optimality curve is estimated for a range of ABH design parameters...
September 2016: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/27911526/dressed-hard-states-and-black-hole-soft-hair
#2
Mehrdad Mirbabayi, Massimo Porrati
A recent, intriguing Letter by Hawking, Perry, and Strominger suggests that soft photons and gravitons can be regarded as black hole hair and may be relevant to the black hole information paradox. In this Letter we make use of factorization theorems for infrared divergences of the S matrix to argue that by appropriately dressing in and out hard states, the soft-quanta-dependent part of the S matrix becomes essentially trivial. The information paradox can be fully formulated in terms of dressed hard states, which do not depend on soft quanta...
November 18, 2016: Physical Review Letters
https://www.readbyqxmd.com/read/27910445/the-advanced-ligo-photon-calibrators
#3
S Karki, D Tuyenbayev, S Kandhasamy, B P Abbott, T D Abbott, E H Anders, J Berliner, J Betzwieser, C Cahillane, L Canete, C Conley, H P Daveloza, N De Lillo, J R Gleason, E Goetz, K Izumi, J S Kissel, G Mendell, V Quetschke, M Rodruck, S Sachdev, T Sadecki, P B Schwinberg, A Sottile, M Wade, A J Weinstein, M West, R L Savage
The two interferometers of the Laser Interferometry Gravitational-wave Observatory (LIGO) recently detected gravitational waves from the mergers of binary black hole systems. Accurate calibration of the output of these detectors was crucial for the observation of these events and the extraction of parameters of the sources. The principal tools used to calibrate the responses of the second-generation (Advanced) LIGO detectors to gravitational waves are systems based on radiation pressure and referred to as photon calibrators...
November 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27886509/smooth-horizonless-geometries-deep-inside-the-black-hole-regime
#4
Iosif Bena, Stefano Giusto, Emil J Martinec, Rodolfo Russo, Masaki Shigemori, David Turton, Nicholas P Warner
We construct the first family of horizonless supergravity solutions that have the same mass, charges, and angular momenta as general supersymmetric rotating D1-D5-P black holes in five dimensions. This family includes solutions with arbitrarily small angular momenta, deep within the regime of quantum numbers and couplings for which a large classical black hole exists. These geometries are well approximated by the black-hole solution, and in particular exhibit the same near-horizon throat. Deep in this throat, the black-hole singularity is resolved into a smooth cap...
November 11, 2016: Physical Review Letters
https://www.readbyqxmd.com/read/27886472/stochastic-gravitational-wave-background-due-to-primordial-binary-black-hole-mergers
#5
Vuk Mandic, Simeon Bird, Ilias Cholis
Recent Advanced LIGO detections of binary black hole mergers have prompted multiple studies investigating the possibility that the heavy GW150914 binary system was of primordial origin, and hence could be evidence for dark matter in the form of black holes. We compute the stochastic background arising from the incoherent superposition of such primordial binary black hole systems in the Universe and compare it to the similar background spectrum due to binary black hole systems of stellar origin. We investigate the possibility of detecting this background with future gravitational-wave detectors, and conclude that constraining the dark matter component in the form of black holes using stochastic gravitational-wave background measurements will be very challenging...
November 11, 2016: Physical Review Letters
https://www.readbyqxmd.com/read/27886058/optical-aptamer-probes-of-fluorescent-imaging-to-rapid-monitoring-of-circulating-tumor-cell
#6
Ji Yeon Hwang, Sang Tae Kim, Ho-Seong Han, Kyunggon Kim, Jin Soo Han
Fluorescence detecting of exogenous EpCAM (epithelial cell adhesion molecule) or muc1 (mucin1) expression correlated to cancer metastasis using nanoparticles provides pivotal information on CTC (circulating tumor cell) occurrence in a noninvasive tool. In this study, we study a new skill to detect extracellular EpCAM/muc1 using quantum dot-based aptamer beacon (QD-EpCAM/muc1 ALB (aptamer linker beacon). The QD-EpCAM/muc1 ALB was designed using QDs (quantum dots) and probe. The EpCAM/muc1-targeting aptamer contains a Ep-CAM/muc1 binding sequence and BHQ1 (black hole quencher 1) or BHQ2 (black hole quencher2)...
November 23, 2016: Sensors
https://www.readbyqxmd.com/read/27880760/astronomy-a-black-hole-changes-its-feeding-habits
#7
Stephanie LaMassa
No abstract text is available yet for this article.
December 1, 2016: Nature
https://www.readbyqxmd.com/read/27858443/redshift-factor-and-the-first-law-of-binary-black-hole-mechanics-in-numerical-simulations
#8
Aaron Zimmerman, Adam G M Lewis, Harald P Pfeiffer
The redshift factor z is an invariant quantity of fundamental interest in post-Newtonian and self-force descriptions of compact binaries. It connects different approximation schemes, and plays a central role in the first law of binary black hole mechanics, which links local quantities to asymptotic measures of energy and angular momentum in these systems. Through this law, the redshift factor is conjectured to have a close relation to the surface gravity of the event horizons of black holes in circular orbits...
November 4, 2016: Physical Review Letters
https://www.readbyqxmd.com/read/27856814/illuminating-the-black-hole-aging-with-autism-spectrum-disorder
#9
Lieke van Heumen
No abstract text is available yet for this article.
December 2016: Gerontologist
https://www.readbyqxmd.com/read/27826958/personalized-medicine-in-allergy
#10
REVIEW
Matteo Ferrando, Diego Bagnasco, Gilda Varricchi, Stefano Bernardi, Alice Bragantini, Giovanni Passalacqua, Giorgio Walter Canonica
Allergic disease is among the most common pathologies worldwide and its prevalence has constantly increased up to the present days, even if according to the most recent data it seems to be slightly slowing down. Allergic disease has not only a high rate of misdiagnosis and therapeutic inefficacy, but represents an enormous, resource-absorbing black hole in respiratory and general medicine. The aim of this paper is to summarize principal therapeutic innovations in atopic disease management befallen in the recent years in terms of personalized/precision medicine...
January 2017: Allergy, Asthma & Immunology Research
https://www.readbyqxmd.com/read/27820632/dna-duplex-based-photodynamic-molecular-beacon-for-targeted-killing-of-retinoblastoma-cell
#11
Yanchun Wei, Cuixia Lu, Qun Chen, Da Xing
Purposes: Retinoblastoma (RB) is the most common primary intraocular malignancy of infancy. An alternative RB treatment protocol is proposed and tested. It is based on a photodynamic therapy (PDT) with a designed molecular beacon that specifically targets the murine double minute x (MDMX) high-expressed RB cells. Methods: A MDMX mRNA triggered photodynamic molecular beacon is designed by binding a photosensitizer molecule (pyropheophorbide-a, or PPa) and a black hole quencher-3 (BHQ3) through a complementary oligonucleotide sequence...
November 1, 2016: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/27819249/numerical-relativity-beyond-astrophysics
#12
David Garfinkle
Though the main applications of computer simulations in relativity are to astrophysical systems such as black holes and neutron stars, nonetheless there are important applications of numerical methods to the investigation of general relativity as a fundamental theory of the nature of space and time. This paper gives an overview of some of these applications. In particular we cover (i) investigations of the properties of spacetime singularities such as those that occur in the interior of black holes and in big bang cosmology...
November 7, 2016: Reports on Progress in Physics
https://www.readbyqxmd.com/read/27815941/when-communicating-health-related-knowledge-beware-of-the-black-holes-of-the-knowledge-landscapes-geography
#13
Srećko Gajović, Anna Lydia Svalastog
No abstract text is available yet for this article.
October 31, 2016: Croatian Medical Journal
https://www.readbyqxmd.com/read/27794604/covalent-functionalization-of-black-phosphorus-from-first-principles
#14
Qiang Li, Qionghua Zhou, Xianghong Niu, Yinghe Zhao, Qian Chen, Jinlan Wang
The chemical functionalization is proven to be an effective and controllable approach to modify the properties of black phosphorus (BP), and improve the air-stability of BP and its nanoelectronic applications [Nat. Chem., 2016, 8, 597]. However, covalent functionalization of BP and related properties are poorly understood. Here we present a theoretical investigation on the electronic structure and transport property of chemically modified BP. Our calculations reveal that the molecule modification generates a rather flat energy band within the bandgap, which leads to a reduced hole mobility of BP...
November 1, 2016: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/27794601/a-dynamically-reconfigurable-ambipolar-black-phosphorus-memory-device
#15
He Tian, Bingchen Deng, Matthew L Chin, Xiaodong Yan, Hao Jiang, Shu-Jen Han, Vivian Sun, Qiangfei Xia, Madan Dubey, Fengnian Xia, Han Wang
Nonvolatile charge-trap memory plays an important role in many modern electronics technologies, from portable electronic systems to large-scale data centers. Conventional charge-trap memory devices typically work with fixed channel carrier polarity and device characteristics. However, many emerging applications in reconfigurable electronics and neuromorphic computing require dynamically tunable properties in their electronic device components that can lead to enhanced circuit versatility and system functionalities...
November 1, 2016: ACS Nano
https://www.readbyqxmd.com/read/27786486/introduction-of-interfacial-charges-to-black-phosphorus-for-a-family-of-planar-devices
#16
Guocai Wang, Lihong Bao, Tengfei Pei, Ruisong Ma, Yu-Yang Zhang, Liling Sun, Guangyu Zhang, Haifang Yang, Junjie Li, Changzhi Gu, Shixuan Du, Sokrates T Pantelides, Ronald D Schrimpf, Hong-Jun Gao
The capabilities to tune the conduction properties of materials by doping or electric fields are essential for the design of electronic devices. However, in two-dimensional materials substitutional doping has been achieved in only a few systems, such as Nb substitutional doping in MoS2. Surface charge transfer is still one of the popular ways to control whether the conduction is dominated by holes or electrons. Here, we demonstrate that a capping layer of cross-linked poly(methyl methacrylate) modifies the potential in a black phosphorus (BP) layer so that conduction in the absence of an external electric field is dominated by electrons, rather than holes...
October 31, 2016: Nano Letters
https://www.readbyqxmd.com/read/27785110/successful-closure-of-treatment-na%C3%A3-ve-flat-edge-type-ii-full-thickness-macular-hole-using-inverted-internal-limiting-membrane-flap-technique
#17
Nazimul Hussain, Anjli Hussain
OBJECTIVE: The objective of this study was to present the outcome of the internal limiting membrane (ILM) peeling flap technique for a treatment-naïve, flat edge (Type II), full-thickness macular hole (MH). METHODS: A 52-year-old man presented with complaints of decreased vision and seeing black spot. He was diagnosed to have a flat edge, full-thickness MH, which was confirmed by optical coherence tomography (OCT). He underwent 23G vitrectomy with brilliant blue G-assisted inverted ILM peeling with an inverted flap over the hole followed by fluid gas exchange...
2016: International Medical Case Reports Journal
https://www.readbyqxmd.com/read/27773305/photostability-and-visible-light-driven-photoactivity-enhancement-of-hierarchical-zns-nanoparticles-the-role-of-embedment-of-stable-defect-sites-on-the-catalyst-surface-with-the-assistant-of-ultrasonic-waves
#18
T Mahvelati-Shamsabadi, E K Goharshadi
Zinc sulfide is a UV-active photocatalyst and it undergoes photocorrosion under light irradiation. In this work, the defect sites on ZnS nanoparticles (NPs) surfaces were induced with the help of powerful ultrasonic waves. The defect sites caused (1) suppression of photocorrosion in a large extent under UV light irradiation and (2) enhancement of visible light photo activity. The photocorrosion inhibition was induced by raising valence band (VB) position through the formation of interstitial zinc and sulfur vacancy states in the ZnS band structure and weakening of oxidative capacity of hole...
January 2017: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/27768787/-black-holes-and-the-ocular-glymphatic-system-author-response-to-the-glymphatic-system-a-new-player-in-ocular-diseases
#19
Alastair K Denniston, Pearse A Keane
No abstract text is available yet for this article.
October 1, 2016: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/27768345/localized-ads_-5-%C3%A3-s-5-black-holes
#20
Óscar J C Dias, Jorge E Santos, Benson Way
According to heuristic arguments, global AdS_{5}×S^{5} black holes are expected to undergo a phase transition in the microcanonical ensemble. At high energies, one expects black holes that respect the symmetries of the S^{5}; at low energies, one expects "localized" black holes that appear pointlike on the S^{5}. According to anti-de Sitter/conformal field theory correspondence, N=4 supersymmetric Yang-Mills (SYM) theory on a 3-sphere should therefore exhibit spontaneous R-symmetry breaking at strong coupling...
October 7, 2016: Physical Review Letters
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