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  • 1
    Language: English
    In: Entropy (Basel, Switzerland), 2019-03-14, Vol.21 (3), p.279
    Description: A map without equilibrium has been proposed and studied in this paper. The proposed map has no fixed point and exhibits chaos. We have investigated its dynamics and shown its chaotic behavior using tools such as return map, bifurcation diagram and Lyapunov exponents’ diagram. Entropy of this new map has been calculated. Using an open micro-controller platform, the map is implemented, and experimental observation is presented. In addition, two control schemes have been proposed to stabilize and synchronize the chaotic map.
    Subject(s): chaos ; approximate entropy ; fixed point ; chaotic map ; implementation
    ISSN: 1099-4300
    E-ISSN: 1099-4300
    Source: Academic Search Ultimate
    Source: PubMed Central
    Source: Directory of Open Access Journals
    Source: Alma/SFX Local Collection
    Source: © ProQuest LLC All rights reserved〈img src="https://exlibris-pub.s3.amazonaws.com/PQ_Logo.jpg" style="vertical-align:middle;margin-left:7px"〉
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  • 2
    Language: English
    In: Cancer research (Chicago, Ill.), 2019-07-01, Vol.79 (13), p.3185-3191
    Description: Chemotherapeutic regimens for ovarian cancer often include the use of DNA interstrand crosslink-inducing agents (e.g., platinum drugs) or DNA double-strand break-inducing agents. Unfortunately, the majority of patients fail to maintain a durable response to treatment, in part, due to drug resistance, contributing to a poor survival rate. In this study, we report that cisplatin sensitivity can be restored in cisplatin-resistant ovarian cancer cells by targeting the chromatin-associated high-mobility group box 3 (HMGB3) protein. HMGB proteins have been implicated in the pathogenesis and prognosis of ovarian cancer, and HMGB3 is often upregulated in cancer cells, making it a potential selective target for therapeutic intervention. Depletion of HMGB3 in cisplatin-sensitive and cisplatin-resistant cells resulted in transcriptional downregulation of the kinases ATR and CHK1, which attenuated the ATR/CHK1/p-CHK1 DNA damage signaling pathway. HMGB3 was associated with the promoter regions of and , suggesting a new role for HMGB3 in transcriptional regulation. Furthermore, HMGB3 depletion significantly increased apoptosis in cisplatin-resistant A2780/CP70 cells after cisplatin treatment. Taken together, our results indicate that targeted depletion of HMGB3 attenuates cisplatin resistance in human ovarian cancer cells, increasing tumor cell sensitivity to platinum drugs. SIGNIFICANCE: This study shows that targeting HMGB3 is a potential therapeutic strategy to overcome chemoresistance in ovarian cancer.
    Subject(s): RNA, Small Interfering - genetics ; Cell Proliferation ; HMGB3 Protein - antagonists & inhibitors ; Humans ; Ovarian Neoplasms - pathology ; Drug Resistance, Neoplasm ; Cisplatin - pharmacology ; HMGB3 Protein - genetics ; HMGB3 Protein - metabolism ; Female ; Antineoplastic Agents - pharmacology ; Ovarian Neoplasms - metabolism ; Tumor Cells, Cultured ; Ovarian Neoplasms - drug therapy ; Apoptosis ; HMGB3 ; DNA damage response ; ovarian cancer ; cisplatin resistance
    ISSN: 0008-5472
    E-ISSN: 1538-7445
    Source: HighWire Press (Free Journals)
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  • 3
    Language: English
    In: Archives of control sciences, 2016-12-01, Vol.26 (4), p.597-610
    Description: In this paper, the state estimation problem for a class of mismatched uncertain time-delay systems is addressed. The estimation uses observer-based control techniques. The mismatched uncertain time-delay systems investigated in this study include mismatched parameter uncertainties in the state matrix and in the delayed state matrix. First, based on a new lemma with appropriately choosing Lyapunov functional, new results for stabilization of mismatched uncertain time-delay systems are provided on the basis of a linear matrix inequality (LMI) framework and the asymptotic convergence properties for the estimation error is ensured. Second, the control and observer gains are given from single LMI feasible solution which can overcome the drawback of the bilinear matrix inequalities approach often reported in the literature. Finally, a numerical example is used to demonstrate the efficacy of the proposed method.
    Subject(s): linear matrix inequality (LMI) ; mismatched uncertain systems ; observer-based control ; time-delay systems
    ISSN: 2300-2611
    E-ISSN: 2300-2611
    Source: Directory of Open Access Journals
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  • 4
    Language: English
    In: IEEE Communications surveys and tutorials, 2018, Vol.20 (4), p.2889-2922
    Description: Recently, ambient backscatter communication has been introduced as a cutting-edge technology which enables smart devices to communicate by utilizing ambient radio frequency (RF) signals without requiring active RF transmission. This technology is especially effective in addressing communication and energy efficiency problems for low-power communications systems such as sensor networks, and thus it is expected to realize numerous Internet-of-Things applications. Therefore, this paper aims to provide a contemporary and comprehensive literature review on fundamentals, applications, challenges, and research efforts/progress of ambient backscatter communications. In particular, we first present fundamentals of backscatter communications and briefly review bistatic backscatter communications systems. Then, the general architecture, advantages, and solutions to address existing issues and limitations of ambient backscatter communications systems are discussed. Additionally, emerging applications of ambient backscatter communications are highlighted. Finally, we outline some open issues and future research directions.
    Subject(s): wireless energy harvesting ; backscatter communications ; Ambient backscatter ; RF signals ; Receivers ; RFID ; Radio frequency ; Wireless communication ; Transmitters ; bistatic backscatter ; IoT networks ; low-power communications ; Backscatter ; Literature reviews ; Communications systems ; Radio signals ; Electronic devices ; Power management ; Energy transmission ; Backscattering ; Power efficiency ; Energy management ; System effectiveness
    ISSN: 1553-877X
    E-ISSN: 1553-877X
    Source: IEEE Electronic Library (IEL)
    Source: © ProQuest LLC All rights reserved〈img src="https://exlibris-pub.s3.amazonaws.com/PQ_Logo.jpg" style="vertical-align:middle;margin-left:7px"〉
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  • 5
    Language: English
    In: Annals of operations research, 2017-09, Vol.256 (2), p.199-202
    Subject(s): Theory of Computation ; Business and Management ; Combinatorics ; Operations Research/Decision Theory ; Decision-making ; Models ; Knowledge management ; Uncertainty (Information theory) ; Analysis
    ISSN: 0254-5330
    E-ISSN: 1572-9338
    Source: Business Source Ultimate
    Source: Alma/SFX Local Collection
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  • 6
    Language: English
    In: Entropy (Basel, Switzerland), 2018-09-14, Vol.20 (9), p.710
    Description: This paper is concerned with the co-existence of different synchronization types for fractional-order discrete-time chaotic systems with different dimensions. In particular, we show that through appropriate nonlinear control, projective synchronization (PS), full state hybrid projective synchronization (FSHPS), and generalized synchronization (GS) can be achieved simultaneously. A second nonlinear control scheme is developed whereby inverse full state hybrid projective synchronization (IFSHPS) and inverse generalized synchronization (IGS) are shown to co-exist. Numerical examples are presented to confirm the findings.
    Subject(s): inverse full state hybrid projective synchronization ; entropy ; inverse generalized synchronization ; fractional discrete chaos ; projective synchronization ; full state hybrid projective synchronization ; generalized synchronization
    ISSN: 1099-4300
    E-ISSN: 1099-4300
    Source: Academic Search Ultimate
    Source: PubMed Central
    Source: Directory of Open Access Journals
    Source: Alma/SFX Local Collection
    Source: © ProQuest LLC All rights reserved〈img src="https://exlibris-pub.s3.amazonaws.com/PQ_Logo.jpg" style="vertical-align:middle;margin-left:7px"〉
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  • 7
    Language: English
    In: SIAM journal on optimization, 2015-01, Vol.25 (1), p.159-184
    Description: Results on stability of both local and global metric regularity under set-valued perturbations are presented. As an application, we study (super)linear convergence of a Newton- type iterative process for solving generalized equations. We investigate several iterative schemes such as the inexact Newton’s method, the nonsmooth Newton’s method for semismooth functions, the inexact proximal point algorithm, etc. Moreover, we also cover a forward-backward splitting algorithm for finding a zero of the sum of two multivalued (not necessarily monotone) operators. Finally, a globalization of the Newton’s method is discussed.
    Subject(s): Mathematics ; Optimization and Control
    ISSN: 1052-6234
    E-ISSN: 1095-7189
    Source: SIAM Journals Online
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  • 8
    Language: English
    In: Journal of global optimization, 2012-03, Vol.52 (3), p.509-535
    Description: In the present paper, we are concerned with conditions ensuring the exact penalty for nonconvex programming. Firstly, we consider problems with concave objective and constraints. Secondly, we establish various results on error bounds for systems of DC inequalities and exact penalty, with/without error bounds, in DC programming. They permit to recast several class of difficult nonconvex programs into suitable DC programs to be tackled by the efficient DCA.
    Subject(s): Concave programming ; DCA ; Subdifferential ; DC programming ; 90C26 ; Optimization ; Economics / Management Science ; 90C20 ; Exact penalty ; 90C30 ; 90C46 ; 49J52 ; Operations Research/Decision Theory ; Reformulation ; Computer Science, general ; Local and global error bounds ; Real Functions ; Computer Science
    ISSN: 0925-5001
    E-ISSN: 1573-2916
    Source: Alma/SFX Local Collection
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  • 9
    Language: English
    In: Circuits, systems, and signal processing, 2020-10, Vol.39 (10), p.5020-5038
    ISSN: 0278-081X
    E-ISSN: 1531-5878
    Source: Alma/SFX Local Collection
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  • 10
    Language: English
    In: ACS applied materials & interfaces, 2018-08-01, Vol.10 (30), p.25263-25272
    Description: In this work, a new approach to modifying poly­(dimethylsiloxane) (PDMS) as a negative triboelectric material using graphene oxide (GO) and a sodium dodecyl sulfate (SDS) surfactant was reported. A porous PDMS@GO@SDS composite triboelectric nanogenerator (TENG) could deliver an output voltage and current of up to 438 V and 11 μA/cm2, respectively. These values were 3-fold higher than those of the flat PDMS. The superior performance is attributed to the intensified negative charges on PDMS from the oxygen functional groups of GO and anionic head groups of the SDS molecules. The outstanding performance and straightforward, low-cost fabrication process of the PDMS@GO@SDS TENG would be beneficial for the further development of powerful NGs integrated into wearable electronics and self-charging power cells.
    Subject(s): Research
    ISSN: 1944-8244
    E-ISSN: 1944-8252
    Source: Hellenic Academic Libraries Link
    Source: © ProQuest LLC All rights reserved〈img src="https://exlibris-pub.s3.amazonaws.com/PQ_Logo.jpg" style="vertical-align:middle;margin-left:7px"〉
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