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Now showing items 1 - 16 of 86129

  • The nature of magnetic anomalies in subduction zones

    Gorodnitskii, A. M.   Brusilovskii, Yu. V.   Ivanenko, A. N.   Popov, K. V.   Shishkina, N. A.  

    The analysis of the magnetic survey data suggests the presence of a frontal zone of intense magnetic anomalies in a number of the Pacific island-arc systems. These zones with amplitudes of 100-300 nT are observed within the Kuril-Kamchatka and Aleutian island arc systems, in Southern and Central America, and Alaska. As demonstrated by the solution of the inverse problem and petromagnetic investigation of the rocks, these zones are presumably related to the serpentinite bodies which form as a result of the hydration of the upper mantle peridotites by the oceanic water penetrating through a system of cracks and fractures into the subducting slab at its bend. The rock magnetic studies show that magnetite is the main carrier of magnetization in these serpentinite bodies. Hydration of the subducting slab also causes hydration of the mantle rocks of the overriding plate with the formation of the magnetized serpentinite wedge. The decompaction of ultrabasic rocks under hydration is marked by a decrease in the gravity field and velocities of elastic waves. As the subducting plate loses water, it becomes embrittled and becomes the localization region for the epicenters of the strongest earthquakes. Magnetic survey can be used for revealing the potential sources of catastrophic earthquakes.
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  • On a simple model of $$X_0(N)$$X0(N)

    Kodrnja   Iva  

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  • A Novel Approach to N′,N′-Diarylhydrazides from N′-Arylhydrazides

    Yu, Jun; Wang, Shuguang; Wen, Jianming; Wang, Jian; Li, Jing-Hua  

    A novel method for conversion of N-arylhydrazides to N,N-diarylhydrazides via aerobic oxidation has been achieved. The aerobic reaction was performed using CuCl2 as a catalyst in NH3H2O-MeOH to give good yields under mild conditions. The mechanism of the reaction is also discussed.
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  • Coronavirus‐days ın dermatology

    Türsen, Ümit   Türsen, Belma   Lotti, Torello  

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  • Restricted sumsets in ℤn

    Tang, Min; Wei, Meng-Ting  

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  • A novel approach for verifiable (n, n) audio secret sharing scheme

    Bharti, Shambhu Shankar; Gupta, Manish; Agarwal, Suneeta  

    Audio is a natural way of communication among persons. Nowadays, many cases of Phone-tapping, hacking of E-mail having some audio files have been reported. Hence, for sending a secret message in audio file over the internet, security and confidentiality must be assured. A secret message is commonly transmitted in encrypted form to assure confidentiality/security using a single key. This does not serve the purpose completely as knowing the key, the whole secret can be revealed. To enhance the security of the secret, sending it through multiple units is preferred. Here, a novel approach is proposed for the same. In the proposed approach an audio secret is divided into n audio shares such that information contained in any proper subset of share/shares (unit) is insignificant. With all the shares only secret can be revealed after performing some computation. Authenticity of the revealed secret can also be confirmed (if necessary) by checking the integrity of individual shares received. If any share is lost during transmission, the proposed scheme has the facility to determine the share number of the lost one, so that request may be sent for resending the same. The proposed scheme is suitable for real-time audio communication as the construction of shares is based upon the available bandwidth. Also, it does not need any cover audio to transmit the share. Experimentally, Mean Opinion Score (MOS) and correlation coefficient (r(S, S-r)) between input secret and revealed secret are found 5 and 0.99 respectively when there is no attack during the transmission. In case the total (either in one or more shares) attack is less than 50% of the size of a single share, MOS of the revealed secret lies between 3.8 to 4.
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  • The continuity of the gauge fixing condition n ? ? n ? A = 0

    Zhou Gao-Liang   Yan Zheng-Xin   Zhang Xin  

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  • A novel approach for verifiable (n, n) audio secret sharing scheme

    Bharti, Shambhu Shankar   Gupta, Manish   Agarwal, Suneeta  

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  • A practical synthesis of N-alkyl- and N,N′-dialkyl-polyamines

    Haussener, Travis J.   Sebahar, Paul R.   Kanna Reddy, Hariprasada R.   Williams, Dustin L.   Looper, Ryan E.  

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  • Group gradings on the superalgebras M ( m , n ), A ( m , n ) and P ( n )

    Hornhardt Caio De Naday   Dos Santos Helen Samara   Kochetov Mikhail  

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  • A Generalization of N. N. Chentsov’s Projection Estimates

    Ibragimov   I. A.  

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  • Modular A(n)(V) theory

    Ren, Li  

    A series of associative algebras A(n)(V) for a vertex operator algebra V over an arbitrary algebraically closed field and nonnegative integers n are constructed such that there is a one to one correspondence between irreducible An(V)-modules which are not A(n-1)(V) modules and irreducible V-modules. Moreover, it is proved that V is rational if and only if A(n)(V) are semisimple for all n. In particular, the homogeneous subspaces of any irreducible V-module are finite dimensional for rational vertex operator algebra V. (C) 2017 Elsevier Inc. All rights reserved.
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  • Géén kinderspel

    Geelen, Ronald  

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  • “SARS-CoV-2: una presentación peculiar”

    Crespo Sabarís, R   Isaula Jiménez, O F   Azofra Andrés, B  

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  • A new amino alcohol N

    Mohammad Hakimi   Sheida Ahmadi   Zahra Mardani   Fabian Mohr  

    In the present work a new ligand, 2-(2-(phenyl(pyridin-2-yl)methyleneamino)ethylamino)ethanol (L), and its Zn(II) and Cd(II) complexes, [Zn(L)Br2] (1), [Cd(L)Br2] (2) and [Cd(L)I2] (3), have been synthesized and characterized by elemental analysis, FT-IR, Raman and 1H NMR spectroscopies as well as X-ray crystallography. All complexes are isostructural and their metal ions have distorted square pyramidal geometry with an MN3X2 (X: Br, I) environment. During the complexation process, the amine group of the ligand becomes a chiral center. In the solid-state, an R-configuration was observed in all three complexes. Furthermore, the molecules form intermolecular C–H⋯O, C–H⋯X and O–H⋯X (X: Br, I) hydrogen bonds in the solid-state.
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  • A novel inhibitor of N

    N-methyladenosine(mA) modification is critical for m RNA splicing, nuclear export, stability and translation. Fat mass and obesity-associated protein(FTO), the first identified m6 A demethylase,is critical for cancer progression. Herein, we developed small-molecule inhibitors of FTO by virtual screening, structural optimization, and bioassay. As a result, two FTO inhibitors namely 18077 and 18097 were identified, which can selectively inhibit demethylase activity of FTO. Specifically, 18097 bound to the active site of FTO and then inhibited cell cycle process and migration of cancer cells. In addition, 18097 reprogrammed the epi-transcriptome of breast cancer cells, particularly for genes related to P53 pathway. 18097 increased the abundance of m6 A modification of suppressor of cytokine signaling1(SOCS1) m RNA, which recruited IGF2 BP1 to increase m RNA stability of SOCS1 and subsequently activated the P53 signaling pathway. Further, 18097 suppressed cellular lipogenesis via downregulation of peroxisome proliferator-activated receptor gamma(PPARγ), CCAAT/enhancer-binding protein alpha(C/EBPa), and C/EBPβ. Animal studies confirmed that 18097 can significantly suppress in vivo growth and lung colonization of breast cancer cells. Collectively, we identified that FTO can work as a potential drug target and the small-molecule inhibitor 18097 can serve as a potential agent against breast cancer.
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