Journal articles: 'Reentrancy'

1

Li, Ruiqiu, and Huimin Ma. "Integrating Preventive Maintenance Planning and Production Scheduling under Reentrant Job Shop." Mathematical Problems in Engineering 2017 (2017): 1–9. http://dx.doi.org/10.1155/2017/6758147.

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This paper focuses on a preventive maintenance plan and production scheduling problem under reentrant Job Shop in semiconductor production. Previous researches discussed production scheduling and preventive maintenance plan independently, especially on reentrant Job Shop. Due to reentrancy, reentrant Job Shop scheduling is more complex than the standard Job Shop which belongs to NP-hard problems. Reentrancy is a typical characteristic of semiconductor production. What is more, the equipment of semiconductor production is very expensive. Equipment failure will affect the normal production plan. It is necessary to maintain it regularly. So, we establish an integrated and optimal mathematical model. In this paper, we use the hybrid particle swarm optimization algorithm to solve the problem for it is highly nonlinear and discrete. The proposed model is evaluated through some simple simulation experiments and the results show that the model works better than the independent decision-making model in terms of minimizing maximum completion time.

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Feldman, A. I., P. P. Crooker, and L. M. Goh. "Chiral strain and reentrancy in blue-phase transitions." Physical Review A 35, no. 2 (January 1, 1987): 842–46. http://dx.doi.org/10.1103/physreva.35.842.

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3

Li, Mai Suan, Tran Quang Hung, and Marek Cieplak. "Reentrancy and Dynamic Specific Heat of Ising Spin Glasses." Journal de Physique I 6, no. 2 (February 1996): 257–63. http://dx.doi.org/10.1051/jp1:1996101.

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4

Qian, Peng, Zhenguang Liu, Qinming He, Roger Zimmermann, and Xun Wang. "Towards Automated Reentrancy Detection for Smart Contracts Based on Sequential Models." IEEE Access 8 (2020): 19685–95. http://dx.doi.org/10.1109/access.2020.2969429.

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Guo, Ran, Weijie Chen, Lejun Zhang, Guopeng Wang, and Huiling Chen. "Smart Contract Vulnerability Detection Model Based on Siamese Network (SCVSN): A Case Study of Reentrancy Vulnerability." Energies 15, no. 24 (December 19, 2022): 9642. http://dx.doi.org/10.3390/en15249642.

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Blockchain technology is currently evolving rapidly, and smart contracts are the hallmark of the second generation of blockchains. Currently, smart contracts are gradually being used in power system networks to build a decentralized energy system. Security is very important to power systems and attacks launched against smart contract vulnerabilities occur frequently, seriously affecting the development of the smart contract ecosystem. Current smart contract vulnerability detection tools suffer from low correct rates and high false positive rates, which cannot meet current needs. Therefore, we propose a smart contract vulnerability detection system based on the Siamese network in this paper. We improved the original Siamese network model to perform smart contract vulnerability detection by comparing the similarity of two sub networks with the same structure and shared parameters. We also demonstrate, through extensive experiments, that the model has better vulnerability detection performance and lower false alarm rate compared with previous research results.

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Zhang, Lejun, Yuan Li, Tianxing Jin, Weizheng Wang, Zilong Jin, Chunhui Zhao, Zhennao Cai, and Huiling Chen. "SPCBIG-EC: A Robust Serial Hybrid Model for Smart Contract Vulnerability Detection." Sensors 22, no. 12 (June 19, 2022): 4621. http://dx.doi.org/10.3390/s22124621.

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With countless devices connected to the Internet of Things, trust mechanisms are especially important. IoT devices are more deeply embedded in the privacy of people’s lives, and their security issues cannot be ignored. Smart contracts backed by blockchain technology have the potential to solve these problems. Therefore, the security of smart contracts cannot be ignored. We propose a flexible and systematic hybrid model, which we call the Serial-Parallel Convolutional Bidirectional Gated Recurrent Network Model incorporating Ensemble Classifiers (SPCBIG-EC). The model showed excellent performance benefits in smart contract vulnerability detection. In addition, we propose a serial-parallel convolution (SPCNN) suitable for our hybrid model. It can extract features from the input sequence for multivariate combinations while retaining temporal structure and location information. The Ensemble Classifier is used in the classification phase of the model to enhance its robustness. In addition, we focused on six typical smart contract vulnerabilities and constructed two datasets, CESC and UCESC, for multi-task vulnerability detection in our experiments. Numerous experiments showed that SPCBIG-EC is better than most existing methods. It is worth mentioning that SPCBIG-EC can achieve F1-scores of 96.74%, 91.62%, and 95.00% for reentrancy, timestamp dependency, and infinite loop vulnerability detection.

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Şerban, Dan Andrei. "Variation of Poisson’s Ratio with Axial Strain for Three-Dimensional Reentrant Auxetic Structures." Material Design & Processing Communications 2022 (January 31, 2022): 1–8. http://dx.doi.org/10.1155/2022/2623601.

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This study presents numerical investigations of the influence of structural parameters on the variation of the Poisson ratio with axial strain for auxetic structures. Three-dimensional reentrant structures were considered with variable strut thickness to length ratio and reentrance angles. The variation of the volume, relative density, and relative stiffness with axial strain was also studied.

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LUHMAN, D. R., W. PAN, T. M. LU, D. C. TSUI, L. N. PFEIFFER, K. W. BALDWIN, and K. W. WEST. "OBSERVATIONS OF PARALLEL FIELD INDUCED REENTRANT QUANTUM HALL EFFECTS IN WIDE GaAs QUANTUM WELLS." International Journal of Modern Physics B 23, no. 12n13 (May 20, 2009): 2808–12. http://dx.doi.org/10.1142/s0217979209062384.

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We report the results of tilted magnetic field experiments on three high quality wide GaAs quantum wells, with particular emphasis on the N ≥ 1 Landau levels. With an increasing component of in-plane magnetic field, B∥, we observe reentrant behavior for the odd filling factor quantum Hall states. This reentrance is not explained within a single-particle energy level crossing scheme and may be related to the collapse of interlayer tunneling.

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Wu, Huaiguang, Hanjie Dong, Yaqiong He, and Qianheng Duan. "Smart Contract Vulnerability Detection Based on Hybrid Attention Mechanism Model." Applied Sciences 13, no. 2 (January 5, 2023): 770. http://dx.doi.org/10.3390/app13020770.

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A smart contract, as an important part of blockchain technology, has attracted considerable interest from both industry and academia. It provides the basis for the realization of a variety of practical blockchain applications and plays a crucial role in the blockchain ecosystem. While it also holds a large number of digital assets, the frequent occurrence of smart contract vulnerabilities have caused huge economic losses and destroyed the blockchain-based credit system. Currently, the security and reliability of smart contracts have become a new focus of research, and there are a number of smart contract vulnerability detection methods, such as traditional detection tools based on static or dynamic analysis. However, most of them often rely on expert rules, and therefore have poor scalability and high false negative and false positive rates. Recent deep learning methods alleviate this issue, but without considering the semantic information and context of source code. To this end, we propose a hybrid attention mechanism (HAM) model to detect security vulnerabilities in smart contracts. We extract code fragments from the source code, which focus on key points of vulnerability. We conduct extensive experiments on two public smart contract datasets (a total of 24,957 contracts). Empirical results show remarkable accuracy improvement over the state-of-the art methods on five kinds of vulnerabilities, where the detection accuracy could achieve 93.36%, 80.85%, 82.56%, 85.62%, and 82.19% for reentrancy, arithmetic vulnerability, unchecked return value, timestamp dependency, and tx.origin, respectively.

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10

Ren, Xiangyang, Shuai Chen, Kunyuan Wang, and Juan Tan. "Design and application of improved sparrow search algorithm based on sine cosine and firefly perturbation." Mathematical Biosciences and Engineering 19, no. 11 (2022): 11422–52. http://dx.doi.org/10.3934/mbe.2022533.

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<abstract> <p>Swarm intelligence algorithms are relatively simple and highly applicable algorithms, especially for solving optimization problems with high reentrancy, high stochasticity, large scale, multi-objective and multi-constraint characteristics. The sparrow search algorithm (SSA) is a kind of swarm intelligence algorithm with strong search capability, but SSA has the drawback of easily falling into local optimum in the iterative process. Therefore, a sine cosine and firefly perturbed sparrow search algorithm (SFSSA) is proposed for addressing this deficiency. Firstly, the Tent chaos mapping is invoked in the initialization population stage to improve the population diversity; secondly, the positive cosine algorithm incorporating random inertia weights is introduced in the discoverer position update, so as to improve the probability of the algorithm jumping out of the local optimum and speed up the convergence; finally, the firefly perturbation is used to firefly perturb the sparrows, and all sparrows are updated with the optimal sparrows using the firefly perturbation method to improve their search-ability. Thirteen benchmark test functions were chosen to evaluate SFSSA, and the results were compared to those computed by existing swarm intelligence algorithms, as well as the proposed method was submitted to the Wilcoxon rank sum test. Furthermore, the aforesaid methods were evaluated in the CEC 2017 test functions to further validate the optimization efficiency of the algorithm when the optimal solution is not zero. The findings show that SFSSA is more favorable in terms of algorithm performance, and the method's searchability is boosted. Finally, the suggested algorithm is used to the locating problem of emergency material distribution centers to further validate the feasibility and efficacy of SFSSA.</p> </abstract>

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11

Морозов, Сергей, Sergey Morozov, Михаил Погодин, and Mikhail Pogodin. "CRISIS: METAPHOR OR ESSENCE." Russian Journal of Management 4, no. 4 (December 8, 2016): 581–91. http://dx.doi.org/10.12737/22559.

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The purpose of this article is to establish the contextual environment of the concept of "crisis" in economic and socio-philosophical context. To achieve objectives the methods are used to estimate economic models and theories on the basis of socio-philosophical approach. As a result of the conclusions that are logically correct term "crisis" is only possible in local areas of knowledge, and a comprehensive interpretation of the crises is not productive. In the Russian context special direction of research crises dominates - in the framework of anti-crisis enterprise management. Partial conclusions and recommendations of economic science in relation to crises do not meet the criteria reentrancy for different socio – economic conditions or types of objects. Diagnosis of the crisis confirms the ambiguity of findings regarding a crisis situation. Relative to global economic theories given the conclusion that the challenges to anticipate and overcome the crisis cannot be solved within existing economic theory methods. Development of mathematical apparatus, the introduction in the model of logical and qualitative indicators, the construction of behavioral models developed understanding of socio-economic systems and processes. But it is not allowed to create a universal economic theory of sustainable development and crises. The effectiveness of local approaches and global insolvency is discovered. Conclusion: in the framework of economic theory there cannot be formulated the minimum and sufficient set of consistent axioms required for solving problems of crisis. Partial conclusion is made that the main issue of crisis management is the question of ownership of the company, as well as its obligations to external agents. The scope of the results – socio-economic system, crisis management.

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12

Indekeu, J. O. "Reentrances below the smectic-A1phase and octuply reentrant liquid crystals." Physical Review A 37, no. 1 (January 1, 1988): 288–91. http://dx.doi.org/10.1103/physreva.37.288.

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13

Tomé, Helbert. "Taquicardia por reentrada ramo a ramo." REVISTA LATINO-AMERICANA DE ARRITMIA E ESTIMULAÇÃO CARDÍACA 31, no. 2 (April 2018): 62–66. http://dx.doi.org/10.24207/1983-5558v31.2-005.

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14

Azhari, Mouhcine, and Unjong Yu. "Monte Carlo studies of the Blume–Capel model on nonregular two- and three-dimensional lattices: phase diagrams, tricriticality, and critical exponents." Journal of Statistical Mechanics: Theory and Experiment 2022, no. 3 (March 1, 2022): 033204. http://dx.doi.org/10.1088/1742-5468/ac561b.

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Abstract We perform Monte Carlo simulations, combining both the Wang–Landau and the Metropolis algorithms, to investigate the phase diagrams of the Blume–Capel model on different types of nonregular lattices (Lieb lattice (LL), decorated triangular lattice (DTL), and decorated simple cubic lattice (DSC)). The nonregular character of the lattices induces a double transition (reentrant behavior) in the region of the phase diagram at which the nature of the phase transition changes from first-order to second-order. A physical mechanism underlying this reentrance is proposed. The large-scale Monte Carlo simulations are performed with the finite-size scaling analysis to compute the critical exponents and the critical Binder cumulant for three different values of the anisotropy Δ / J ∈ 0 , 1 , 1.34 ( for LL ) , 1.51 ( for DTL and DSC ) , showing thus no deviation from the standard Ising universality class in two and three dimensions. We report also the location of the tricritical point to considerable precision: (Δ t /J = 1.3457(1); k B T t /J = 0.309(2)), (Δ t /J = 1.5766(1); k B T t /J = 0.481(2)), and (Δ t /J = 1.5933(1); k B T t /J = 0.569(4)) for LL, DTL, and DSC, respectively.

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15

Bulut, Atilla. "Epicardial Fat Thickness May be Used in the Differential Diagnosis of Atrioventricular Nodal Re-entrant and Atrioventricular Re-entrant Tachycardia." Kosuyolu Heart Journal 22, no. 3 (December 20, 2019): 188–92. http://dx.doi.org/10.5578/khj.68594.

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16

Befus, Kenneth S., and Michael Manga. "Supereruption quartz crystals and the hollow reentrants." Geology 47, no. 8 (May 22, 2019): 710–14. http://dx.doi.org/10.1130/g46275.1.

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Abstract Hollow reentrants in quartz phenocrysts from Yellowstone (western United States) caldera’s Lava Creek Tuff are preserved vestiges of bubbles in the supereruption’s pre-eruptive magma reservoir. We characterized the reentrants using a combination of petrographic techniques, synchrotron X-ray microtomography, and cathodoluminescence imagery. One or more reentrants occur in ∼20% of quartz, and up to ∼90% of those reentrants are hollow. The earliest-erupted parts of the Lava Creek Tuff have the most empty reentrants. The hollow reentrants provide direct, physical evidence for volatile saturation, exsolution, and retention in a magma reservoir. Quartz-melt surface tension permits bubbles to attach to quartz only when bubbles have been able to nucleate and grow in the melt. Prior to eruption, the Lava Creek Tuff existed as a bubbly, volatile-saturated magma reservoir. The exsolved volatiles increased magma compressibility, helping to prevent the ever-accumulating magma from reaching a critical, eruptive overpressure until it reached a tremendous volume.

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17

Aguilera-del-Toro, R. H., F. Aguilera-Granja, M. B. Torres, and A. Vega. "Relation between structural patterns and magnetism in small iron oxide clusters: reentrance of the magnetic moment at high oxidation ratios." Physical Chemistry Chemical Physics 23, no. 1 (2021): 246–72. http://dx.doi.org/10.1039/d0cp03795h.

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18

Fralix, Brian. "ON THE TIME-DEPENDENT BEHAVIOR OF A MARKOVIAN REENTRANT-LINE MODEL." Probability in the Engineering and Informational Sciences 33, no. 3 (August 3, 2018): 367–86. http://dx.doi.org/10.1017/s0269964818000268.

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We use the random-product technique from [5] to study both the steady-state and time-dependent behavior of a Markovian reentrant-line model, which is a generalization of the preemptive reentrant-line model studied in the work of Adan and Weiss [2]. Our results/observations yield additional insight into why the stationary distribution of the reentrant-line model from [2] exhibits an almost-geometric product-form structure: indeed, our generalized reentrant-line model, when stable, admits a stationary distribution with a similar product-form representation as well. Not only that, the Laplace transforms of the transition functions of our reentrant-line model also have a product-form structure if it is further assumed that both Buffers 2 and 3 are empty at time zero.

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19

Sudha, Govindarajan, Claudio Bassot, John Lamb, Nanjiang Shu, Yan Huang, and Arne Elofsson. "The evolutionary history of topological variations in the CPA/AT transporters." PLOS Computational Biology 17, no. 8 (August 17, 2021): e1009278. http://dx.doi.org/10.1371/journal.pcbi.1009278.

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CPA/AT transporters are made up of scaffold and a core domain. The core domain contains two non-canonical helices (broken or reentrant) that mediate the transport of ions, amino acids or other charged compounds. During evolution, these transporters have undergone substantial changes in structure, topology and function. To shed light on these structural transitions, we create models for all families using an integrated topology annotation method. We find that the CPA/AT transporters can be classified into four fold-types based on their structure; (1) the CPA-broken fold-type, (2) the CPA-reentrant fold-type, (3) the BART fold-type, and (4) a previously not described fold-type, the Reentrant-Helix-Reentrant fold-type. Several topological transitions are identified, including the transition between a broken and reentrant helix, one transition between a loop and a reentrant helix, complete changes of orientation, and changes in the number of scaffold helices. These transitions are mainly caused by gene duplication and shuffling events. Structural models, topology information and other details are presented in a searchable database, CPAfold (cpafold.bioinfo.se).

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Chen, Hongwu, Kit Chan, Sunny S. Po, and Minglong Chen. "Idiopathic Left Ventricular Tachycardia Originating in the Left Posterior Fascicle." Arrhythmia & Electrophysiology Review 8, no. 4 (February 11, 2020): 249–54. http://dx.doi.org/10.15420/aer.2019.07.

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Ventricular tachycardias originating from the Purkinje system are the most common type of idiopathic left ventricular tachycardia. The majority if not all of the reentrant circuit involved in this type of tachycardia is formed by the Purkinje fibres of the left bundle branch, particularly the left posterior fascicle. In general, slowly conducting Purkinje fibres (P1) form the antegrade limb, and normally conducting Purkinje fibres (P2) form the retrograde limb of the reentrant circuit of the ventricular tachycardia originating from the left posterior fascicle. Elimination of the critical Purkinje elements in the reentrant circuit is the route to successful ablation. While the reentrant circuit identified by activation mapping provides the roadmap to ablation targets, comparing the difference in the His-ventricular interval during sinus rhythm and tachycardia also helps to identify the critical site in the reentrant circuit.

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van Enter, A. C. D., and J. L. van Hemmen. "Spin canting and reentrance." Physical Review B 31, no. 1 (January 1, 1985): 603–5. http://dx.doi.org/10.1103/physrevb.31.603.

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22

Huang, Binghuan, Haiwang Li, and Tiantong Xu. "Experimental Investigation of the Flow and Heat Transfer Characteristics in Microchannel Heat Exchangers with Reentrant Cavities." Micromachines 11, no. 4 (April 12, 2020): 403. http://dx.doi.org/10.3390/mi11040403.

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The application of microchannel heat exchangers is of great significance in industrial fields due to their advantages of miniaturized scale, large surface-area-to-volume ratio, and high heat transfer rate. In this study, microchannel heat exchangers with and without fan-shaped reentrant cavities were designed and manufactured, and experiments were conducted to investigate the flow and heat-transfer characteristics. The impact rising from the radius of reentrant cavities, as well as the Reynolds number on the heat transfer and the pressure drop, is also analyzed. The results indicate that, compared with straight microchannels, microchannels with reentrant cavities could enhance the heat transfer and, more importantly, reduce the pressure drop at the same time. For the ranges of parameters studied, increasing the radius of reentrant cavities could augment the effect of pressure-drop reduction, while the corresponding variation of heat transfer is complicated. It is considered that adding reentrant cavities in microchannel heat exchangers is an ideal approach to improve performance.

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23

Zhao, Shuaiquan, Hong Hu, Hasan Kamrul, Yuping Chang, and Minglonghai Zhang. "Development of auxetic warp knitted fabrics based on reentrant geometry." Textile Research Journal 90, no. 3-4 (August 1, 2019): 344–56. http://dx.doi.org/10.1177/0040517519866931.

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This paper reports a novel method to fabricate auxetic warp knitted fabrics on a tricot warp knitting machine based on a special structure design and knitting process. Three auxetic warp knitted structures were successfully developed and all of them were designed to form a reentrant hexagonal geometry to acquire an auxetic effect. To provide the fabrics with reentrant frames, elastomeric yarns and stiff yarns were used to form the elastic underlaps and stiff underlaps, respectively. While the elastic underlaps can keep the reentrant structures stable, the stiff underlaps can support the reentrant structures to keep their reentrant frames. To alleviate the transfer of yarns in the loops under tension, an additional front yarn guide bar was used to feed binding yarns to basic reentrant structures. After knitting, all the fabrics were subjected to a heat setting process to keep their shape and a tensile test to assess their auxetic behavior. The experimental results showed that all the fabrics exhibited an obvious auxetic behavior within a wide range of strain. In particular, the fabrics retained auxetic behavior until breaking when stretched in the wale direction, and the Poisson’s ratio of the fabrics could be as low as –0.5. On the other hand, the fabrics exhibited a large tensile elongation when stretched in the course direction and their Poisson’s ratios changed from negative to positive after the tensile strain exceeded a certain value.

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Ruan, Xiao Li, Jie Jie Li, Xiao Ke Song, Hong Jian Zhou, Wei Xing Yuan, Wen Wang Wu, and Re Xia. "Mechanical Design of Antichiral-Reentrant Hybrid Intravascular Stent." International Journal of Applied Mechanics 10, no. 10 (December 2018): 1850105. http://dx.doi.org/10.1142/s1758825118501053.

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Chiral and reentrant metastructures with auxetic deformation abilities can serve as the building blocks in many industrial applications because of their light weight, high specific strength, energy absorption properties. In this paper, we report an innovative tubular-like structure by a combined mechanical effect of antichiral and reentrant. 2D antichiral-reentrant hybrid structures consisting of circular nodes and tangentially-connected ligaments are predesigned and fabricated using laser cutting technology with high-resolution. The elastic properties and auxeticity of the plane structure are analyzed and compared based on finite element analysis (FEA) and experimental results. For the first time, the antichiral-reentrant hybrid intravascular stents with the auxetic feature are proposed and parametric models are devised with good geometrical structure demonstrated. A series of large-scale stents are manufactured with stereolithography apparatus (SLA) additive manufacturing technique, and their mechanical behaviors are investigated in both experimental tests and FEA. As the selected antichiral-reentrant hybrid stents with tailored expansion ability are subjected to radial loading by the dilation of the balloon, stents undergo identifiable deformation mechanism due to the beam-like ligaments and circular node elements in the varied geometrical design, resulting in the distinct stress outcomes in plaque. It is also demonstrated that the antichiral-reentrant hybrid stents with tunable auxeticity possess robust mechanical properties through implantation inside the obstructed lesion.

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Wang, Tun, and Yu Tian. "Design of Embedded Ai Engine Based on the Microkernel Operating System." Wireless Communications and Mobile Computing 2022 (April 21, 2022): 1–9. http://dx.doi.org/10.1155/2022/9304019.

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At present, the application of the embedded microkernel operating system in military and civil fields has begun to take shape, but it has not yet formed a unified method and standard. Due to its high performance, low frequency, and high reliability, dual-core embedded processors are getting the attention of many chip manufacturers. Compatibility has been favored by many telecom equipment manufacturers and embedded high-end application integrators, but the dual-core embedded processor needs a new real-time operating system to support it, so that it can give full play to the high performance of the dual-core. It paves the way for the application of its processor in the embedded field, but the design of embedded AI engine is not transparent to it; so, it needs the support of operating system. The user code is used to be in the operating system processor environment; so, it can be used on dual core processor first. In the real-time operating system that supports dual-core processors, the part that needs to be modified is mainly concentrated in the kernel part; so, the core design is the key point to support dual-core processors. This article is to seize this key point to carry out in-depth research. The difference and influence of hardware architecture between dual-core processor and single-core processor are the primary content of the study. Through the research of the dual-core processor architecture, the general abstraction of the dual-core processor architecture is obtained, which is the starting point of the follow-up research. This paper mainly studies the design of embedded AI engine based on the microkernel operating system, extracts the security requirements of the operating system, designs and implements the operating system from the perspective of formal verification, and considers the verification problem under the background of RTOS development, so as to avoid using too many complex data structures and algorithms in the system design and reduce the difficulty of experimental verification. In this paper, we use the spatiotemporal data model, data sharing security in the cloud environment, symmetric encryption scheme, and Paillier homomorphic encryption method to study the design of embedded AI engine based on the microkernel operating system. According to the idea of microkernel architecture, the kernel is divided into four main modules: task processing, semaphore, message queue, interrupt, and exception processing, and the lock mechanism to prevent reentrancy in software is analyzed separately. Three core function modules, initialization, process grinding, and interrupt processing, are extracted from the microkernel operating system to form the formal verification area of the operating system. At the same time, the system syntax and semantics of related rights are separated, and the main rationalization rules are described. The results show that the core of the microkernel operating system in five states adopts the microkernel architecture in the dual core environment. The microkernel architecture is a compact system kernel with good adjustability. Based on the analysis of the microkernel operating system, the internal structure of each module in the kernel is summarized, and the modules are modified according to the machine characteristics of the dual core processor; it corresponds to adding modules to meet the characteristics of dual core architecture. Kernel design is a systematic theoretical research process. This paper only uncovers the tip of the iceberg of real-time operating system kernel design on dual-core embedded processors. It is necessary to understand the kernel more deeply and master the kernel in the future work and study.

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Aşkın, Lütfü, and Serdar Türkmen. "The Relationship Between Heart Rate Variability Parameters and Atrioventricular Nodal Reentrant Tachycardia." Kosuyolu Heart Journal 21, no. 2 (August 10, 2018): 128–34. http://dx.doi.org/10.5578/khj.66670.

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Katritsis, Demosthenes G., and Mark E. Josephson. "Classification, Electrophysiological Features and Therapy of Atrioventricular Nodal Reentrant Tachycardia." Arrhythmia & Electrophysiology Review 5, no. 2 (2016): 130. http://dx.doi.org/10.15420/aer.2016.18.2.

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Atrioventricular nodal reentrant tachycardia (AVNRT) should be classified as typical or atypical. The term ‘fast-slow AVNRT’ is rather misleading. Retrograde atrial activation during tachycardia should not be relied upon as a diagnostic criterion. Both typical and atypical atrioventricular nodal reentrant tachycardia are compatible with varying retrograde atrial activation patterns. Attempts at establishing the presence of a ‘lower common pathway’ are probably of no practical significance. When the diagnosis of AVNRT is established, ablation should be only directed towards the anatomic position of the slow pathway. If right septal attempts are unsuccessful, the left septal side should be tried. Ablation targeting earliest atrial activation sites during typical atrioventricular nodal reentrant tachycardia or the fast pathway in general for any kind of typical or atypical atrioventricular nodal reentrant tachycardia, are not justified. In this review we discuss current concepts about the tachycardia circuit, electrophysiologic diagnosis, and ablation of this arrhythmia.

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Karas, Barry J., and Blair P. Grubb. "Reentrant tachycardias." Postgraduate Medicine 103, no. 1 (January 1998): 84–98. http://dx.doi.org/10.3810/pgm.1998.01.266.

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Lam, L. "Reentrant solitons." Liquid Crystals 14, no. 6 (January 1993): 1873–76. http://dx.doi.org/10.1080/02678299308027722.

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30

Schweikert, K. H., and F. Noack. "Proton Spin Relaxation in Reentrant Nematic Cyano -biphenyl Liquid Crystals." Zeitschrift für Naturforschung A 44, no. 7 (July 1, 1989): 597–609. http://dx.doi.org/10.1515/zna-1989-0701.

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Abstract The frequency dependence of the longitudinal proton spin relaxation time T1 was measured by field-cycling and standard NMR techniques in the nematic, smectic and reentrant nematic mesophases of the reentrant liquid crystal 6OCB-8OCB. The results clearly demonstrate that, in contrast to conclusions reported in the literature, the underlying relaxation mechanisms are the same for the nematic and reentrant nematic order, but different in the nematic and smectic phase. In particular, at low frequencies the nematic and reentrant samples reveal a square-root dispersion profile (T1,~ ν½) characteristic for nematic director fluctuations, whereas the smectic samples show a dissimilar and only very narrow dispersion step. It can be attributed to a linear relaxation time increase (T1 ~ v1) expected for smectic-type order fluctuations. The experimental data are described and discussed in terms of four molecular processes, namely nematic or smectic order fluctuations, self-diffusion, rotational motions, and a resonant proton nitrogen coupling.

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Cousineau, Pierre A., and Hugues Longuépée. "Lower Paleozoic configuration of the Quebec reentrant based on improved along-strike paleogeography." Canadian Journal of Earth Sciences 40, no. 2 (February 1, 2003): 207–19. http://dx.doi.org/10.1139/e02-107.

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An improved paleogeography of the Quebec reentrant has been achieved by examining the nature and distribution of major sediment buildups within this reentrant. The Quebec reentrant has one side produced by rift faults and one side by a major transform fault. The Oak Hill Group was deposited near a triple-rift zone. Clastic sediments of this group formed a large delta that was fed by a major river flowing in the rift valley of the Ottawa graben. The delta must have prograded on a gentle slope platform. No other thick deltaic deposits are known towards the northeast. Instead, facies analyses favor the existence of a promontory near Québec. Still farther to the northeast, the Saguenay graben was not the product of a triple-rift junction. However, it served to funnel sediments to a deep-sea fan, and the adjacent platform was narrow with a steep slope. The lateral distribution of sediments from the Ordovician Taconic orogeny can be explained by this improved paleogeographic reconstruction. The configuration of the Quebec reentrant required the arc to move into the reentrant. The Taconian tectonic wedge progressively accreted the thick sediment buildups that were the Oak Hill delta and the Bas-du-Fleuve deep-sea fan. This allowed them to act as new barriers to orogenic sediment dispersal as the orogeny proceeded.

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32

Lewis, J. S., E. Tomchuk, and E. Bock. "A carbon-13 nuclear magnetic resonance relaxation study of the reentrant 60CB–80CB." Canadian Journal of Physics 69, no. 12 (December 1, 1991): 1454–58. http://dx.doi.org/10.1139/p91-216.

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The carbon-13 spin-lattice relaxation times of the protonated ring carbons of octyloxycyanobiphenyl (80CB) in a 26 wt.% mixture of perdeuterated hexyloxycyanobiphenyl (60CB–d21) in 80CB are measured as a function of temperature at 22.63 MHz in the nematic (N), smectic A(SA), and reentrant nematic (RN) phases. The deuterium spectral densities of the ring deuterons of 60CB–d21 in the same sample were studied previously, and the diffusion coefficients [Formula: see text] and [Formula: see text] found in that study are used to calculate the theoretical carbon-13 relaxation times of the protonated ring carbons of 60CB. The general agreement of the theoretical values for 60CB with the experimental values for 80CB demonstrates that the two constituent molecules of the reentrant have similar motions. Small differences, similar in nature to those encountered in other studies of this interesting reentrant, however, do exist in the nematic and reentrant nematic phases and are discussed in terms of the molecular pairing model proposed by Cladis. (Phys. Rev. Lett. 35, 48 (1975).)

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33

Xu, Bo Hao, Shuai Wang, Kai Fa Zhou, Wen Yi Ma, and Nan Sun. "Large Torsion Deformation: Centrosymmetric Reentrant Honeycomb." Applied Mechanics and Materials 904 (January 4, 2022): 17–25. http://dx.doi.org/10.4028/www.scientific.net/amm.904.17.

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There exist some problems in the crash box and anti-collision beam sandwich structure, such as monotone deformation pattern and uneconomical energy absorption performance. In order to raise the deformation capacity and energy absorption performance of sandwich structure, centrosymmetric reentrant honeycomb (CRH) and hexagonal centrosymmetric reentrant honeycomb (HCRH) are proposed based on auxetic reentrant honeycomb (ARH) in this work. Based on HCRH, four kinds of transverse combination structures and two kinds of longitudinal combination structures are obtained. The results of specific energy absorption show that the energy absorption capacity of the angular contact homodromous combination structure (ACOC) is about 3 times that of the other three transverse combination structures. Compared with longitudinal heterodromous combination structure (LHEC), the energy absorption capacity of longitudinal homodromous combination structure (LHOC) is improved by 72.7%.

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34

Zhang, Xiang-Wen, and De-Qing Yang. "Numerical and Experimental Studies of a Light-Weight Auxetic Cellular Vibration Isolation Base." Shock and Vibration 2016 (2016): 1–16. http://dx.doi.org/10.1155/2016/4017534.

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This paper presents a preliminary study of the dynamic performance of a novel light-weight auxetic (negative Poisson’s ratio) cellular vibration isolation base constituted by reentrant hexagonal honeycombs. Numerical and experimental analyses were conducted to reveal the effects of Poisson’s ratio (cell angle) and relative density (cell thickness) of these reentrant honeycombs on the dynamic performance of this novel base and to propose design guidelines for the best use of the auxetic cellular vibration isolation system. By doing numerical analysis, we found that, by decreasing the relative density of reentrant honeycombs and increasing Poisson’s ratio of them, excellent vibration isolation performance of the auxetic cellular base will be achieved. This analysis was followed by static, modal, and frequency response tests, which verified the results of the numerical analysis.

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Sonoda, Kazumasa, Yasuo Okumura, Ichiro Watanabe, Koichi Nagashima, Sayaka Kurokawa, Rikitake Kogawa, Naoko Sasaki, et al. "A Case of Isolated Left Ventricular Noncompaction Presenting with Atrioventricular Nodal Reentrant Tachycardia." Journal of Nihon University Medical Association 74, no. 4 (2015): 183–85. http://dx.doi.org/10.4264/numa.74.183.

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36

Johnson, Jonathan N., Michael J. Ackerman, and Bryan C. Cannon. "Atypical atrioventricular nodal reentry tachycardia in a child with polyvalvular dysplasia." Cardiology in the Young 25, no. 3 (May 9, 2014): 584–87. http://dx.doi.org/10.1017/s1047951114000717.

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AbstractA 10-year-old boy with polyvalvular dysplasia and severe involvement of both atrioventricular valves presented with palpitations. Concern was raised for atrial tachyarrhythmia due to biatrial enlargement; however, ambulatory monitoring discovered a reentrant mechanism. Electrophysiology study revealed atypical atrioventricular nodal reentrant tachycardia involving two components of the slow pathway, with inputs in the posterior septum around his dysplastic tricuspid valve. He underwent successful modification of the slow pathway using cryoablation.

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37

Pilkiewicz, Kevin R., and Joel D. Eaves. "Reentrance in an active glass mixture." Soft Matter 10, no. 38 (2014): 7495–501. http://dx.doi.org/10.1039/c4sm01177e.

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38

Castro, F., A. D. Sánchez, and H. S. Wio. "Reentrance Phenomena in Noise Induced Transitions." Physical Review Letters 75, no. 9 (August 28, 1995): 1691–94. http://dx.doi.org/10.1103/physrevlett.75.1691.

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39

Marzlin, Karen M., and Cynthia Webner. "Atrioventricular Reentrant Tachycardia." AACN Advanced Critical Care 28, no. 2 (June 15, 2017): 223–28. http://dx.doi.org/10.4037/aacnacc2017151.

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40

AKHTAR, MASOOD. "Reentrant Junctional Tachycardias." Pacing and Clinical Electrophysiology 13, no. 12 (December 1990): 2133–39. http://dx.doi.org/10.1111/j.1540-8159.1990.tb06956.x.

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41

Kuznetsov, V. V., A. K. Savchenko, M. E. Raikh, L. I. Glazman, D. R. Mace, E. H. Linfield, and D. A. Ritchie. "Reentrant resonant tunneling." Physical Review B 54, no. 3 (July 15, 1996): 1502–5. http://dx.doi.org/10.1103/physrevb.54.1502.

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42

Uhlman, James S. "A Note on the Development of a Nonlinear Axisymmetric Reentrant Jet Cavitation Model." Journal of Ship Research 50, no. 03 (September 1, 2006): 259–67. http://dx.doi.org/10.5957/jsr.2006.50.3.259.

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The boundary integral method is formulated for the problem of the fully nonlinear, axisymmetric potential flow past a body of revolution. A model is devised for the exact formulation of the reentrant jet cavity closure condition. It is demonstrated that the solution obtained is essentially independent of the length selected for the jet. Results obtained using the reentrant jet cavity closure model are compared with those obtained using the Riabouchinsky-type cavity closure model used by Uhlman (1987, 1989) and with experimental results. The agreement between the two cavity closure models is seen to be excellent, with the Riabouchinsky wall results deviating only slightly at short cavity lengths. The agreement of the reentrant jet model with the experimental data is also excellent, although the addition of the viscous component of drag is seen to be required for cavitating cones of sufficiently small half-angle.

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43

BERNUS, O., H. VERSCHELDE, and A. V. PANFILOV. "REENTRY IN AN ANATOMICAL MODEL OF THE HUMAN VENTRICLES." International Journal of Bifurcation and Chaos 13, no. 12 (December 2003): 3693–702. http://dx.doi.org/10.1142/s021812740300896x.

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We study wave propagation in a recently developed model, which reproduces geometry and fiber orientation in the right and left ventricles of the human heart. The cardiac tissue is represented using the previously developed γ-ionic model for human ventricular tissue using a spatial resolution of 0.5 mm. We simulate three-dimensional reentrant behavior resulting from a single vortex located in the free wall of the right, left ventricles and in the interventricular septum. We found that single reentrant scroll waves can generate V-shaped collision areas and in some cases, epicardial breakthrough patterns. The simulated ECGs of single spiral waves show similarities with monomorphic and polymorphic ventricular tachycardia, depending on the location of the reentrant sources. We model complex activation patterns resembling ventricular fibrillation by simulating the effects of an ATP-sensitive potassium channel opener and find that VF is, in that case, organized by a small number of vortices.

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Nouroozi, M., M. Pasandidehfard, and M. H. Djavareshkian. "Simulation of Partial and Supercavitating Flows around Axisymmetric and Quasi-3D Bodies by Boundary Element Method Using Simple and Reentrant Jet Models at the Closure Zone of Cavity." Mathematical Problems in Engineering 2016 (2016): 1–13. http://dx.doi.org/10.1155/2016/1593849.

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A fixed-length Boundary Element Method (BEM) is used to investigate the super- and partial cavitating flows around various axisymmetric bodies using simple and reentrant jet models at the closure zone of cavity. Also, a simple algorithm is proposed to model the quasi-3D cavitating flows over elliptical-head bodies using the axisymmetric method. Cavity and reentrant jet lengths are the inputs of the problem and the cavity shape and cavitation number are some of the outputs of this simulation. A numerical modeling based on Navier-Stokes equations using commercial CFD code (Fluent) is performed to evaluate the BEM results (in 2D and 3D cases). The cavitation properties approximated by the present research study (especially with the reentrant jet model) are very close to the results of other experimental and numerical solutions. The need for a very short time (only a few minutes) to reach the desirable convergence and relatively good accuracy are the main advantages of this method.

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Neto, Minos A., J. Ricardo de Sousa, Igor T. Padilha, Octavio D. Rodriguez Salmon, J. Roberto Viana, and F. Dinóla Neto. "The magnetic susceptibility on the transverse antiferromagnetic Ising model: Analysis of the reentrant behavior." International Journal of Modern Physics B 30, no. 17 (June 30, 2016): 1630011. http://dx.doi.org/10.1142/s0217979216300115.

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We study the three-dimensional antiferromagnetic Ising model in both uniform longitudinal [Formula: see text] and transverse [Formula: see text] magnetic fields by using the effective-field theory (EFT) with finite cluster [Formula: see text] spin (EFT-1). We analyzed the behavior of the magnetic susceptibility to investigate the reentrant phenomena that we have seen in the same phase diagram previously obtained in other papers. Our results shows the presence of two divergences in the susceptibility that indicates the existence of a reentrant behavior.

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46

Liu, Ai Jun, Yu Yang, Xue Dong Liang, Ming Hua Zhu, and Hao Yao. "Dynamic Reentrant Scheduling Simulation for Assembly and Test Production Line in Semiconductor Industry." Advanced Materials Research 97-101 (March 2010): 2418–22. http://dx.doi.org/10.4028/www.scientific.net/amr.97-101.2418.

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Production scheduling in semiconductor production line is a complex combinatorial optimization problem. It is featured by reentrant production, product variety, frequent machine breakdown and especially reentrant phenomenon and dynamic randomness, which conduces enormous complexity to production line scheduling and management. Based on the resource conflict resolution strategies, dynamic scheduling models for a semiconductor production system are proposed here, aiming at finding maximum machine utilization, optimal man-machine ratio (MMR) and maximum output. Then the validity of the model is illustrated by a simulation case.

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47

Hélie, François, Alain Vinet, and René Cardinal. "Spatiotemporal dynamics of reentrant ventricular tachycardias in canine myocardial infarction: pharmacological modulation." Canadian Journal of Physiology and Pharmacology 81, no. 5 (May 1, 2003): 413–22. http://dx.doi.org/10.1139/y03-040.

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During the transition from a slow to rapid depolarization rhythm, rate-dependent sodium channel blockade develops progressively and increases from beat to beat under procainamide but more abruptly under lidocaine. We investigated the consequences of such differences on the dynamic course and stability of reentrant tachycardias at their onset. Procainamide and lidocaine were infused to equipotent plasma concentrations in canines with three-day-old myocardial infarction. We measured the activation times (ms) and maximum slopes of negative deflections in activation complexes (absolute value: |dV/dtmax| in mV/ms) in 191 unipolar electrograms recorded from ischemically damaged subepicardial muscle during programmed stimulation inducing reentrant tachycardias. Procainamide caused a greater reduction in |dV/dtmax| than did lidocaine in the responses to basic stimulation, and it favored the occurrence of cycle length prolongation at tachycardia onset as the |dV/dtmax| decreased progressively in successive beats. This resulted in conduction block and tachycardia termination in three of eight preparations. In contrast, lidocaine caused a greater depression in |dV/dtmax| in response to closely coupled extrastimuli, but |dV/dtmax| remained constant or even improved thereafter, and none of the tachycardias terminated spontaneously under lidocaine (n = 9). However, the reentrant circuits remained spatially unstable, and lidocaine favored the occurrence of cycle length dynamics displaying constant or decreasing trends. This study supports the notion that cycle length dynamics at tachycardia onset are determined by the properties of the reentrant substrate and their pharmacological modulation. Key words: lidocaine, procainamide, reentry, ventricular tachycardia, cycle length dynamics.

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48

Jin, Qi, Derek J. Dosdall, Li Li, Jack M. Rogers, Raymond E. Ideker, and Jian Huang. "Verapamil reduces incidence of reentry during ventricular fibrillation in pigs." American Journal of Physiology-Heart and Circulatory Physiology 307, no. 9 (November 1, 2014): H1361—H1369. http://dx.doi.org/10.1152/ajpheart.00256.2014.

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The characteristics of reentrant circuits during short duration ventricular fibrillation (SDVF; 20 s in duration) and the role of Ca++ and rapid-activating delayed rectifier potassium currents during long duration ventricular fibrillation (LDVF; up to 10 min in duration) were investigated using verapamil and sotalol. Activation mapping of the LV epicardium with a 21 × 24 electrode plaque was performed in 12 open-chest pigs. Pigs were given either verapamil (0.136 mg/kg) or sotalol (1.5 mg/kg) and verapamil. Reentry patterns were quantified for SDVF, and, for LDVF, activation patterns were compared with our previously reported control LDVF data. Verapamil significantly increased conduction velocity around the reentrant core by 10% and reduced the reentrant cycle length by 15%, with a net reduction in reentry incidence of 70%. Sotolol had an opposite effect of decreasing the conduction velocity around the core by 6% but increasing the reentrant cycle length by 13%, with a net reduction of reentry incidence of 50%. After 200 s of VF, verapamil significantly slowed wavefront conduction velocity and activation rate compared with control data. Verapamil decreased the incidence of reentry in SDVF by accelerating conduction velocity to increase the likelihood of conduction block, possibly through increased sympathetic tone. The drug slowed activation rate and conduction velocity after 200 s of VF, suggesting that L-type Ca++ channels remain active and may be important in the maintenance of LDVF. Sotalol in addition to verapamil caused no additional antiarrhythmic effect.

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Pan, Minqiang, Hongqing Wang, Yujian Zhong, Tianyu Fang, and Xineng Zhong. "Numerical simulation of the fluid flow and heat transfer characteristics of microchannel heat exchangers with different reentrant cavities." International Journal of Numerical Methods for Heat & Fluid Flow 29, no. 11 (November 4, 2019): 4334–48. http://dx.doi.org/10.1108/hff-03-2019-0252.

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Purpose With the increasing heat dissipation of electronic devices, the cooling demand of electronic products is increasing gradually. A water-cooled microchannel heat exchanger is an effective cooling technology for electronic equipment. The structure of a microchannel has great impact on the heat transfer performance of a microchannel heat exchanger. The purpose of this paper is to analyze and compare the fluid flow and heat transfer characteristic of a microchannel heat exchanger with different reentrant cavities. Design/methodology/approach The three-dimensional steady, laminar developing flow and conjugate heat transfer governing equations of a plate microchannel heat exchanger are solved using the finite volume method. Findings At the flow rate range studied in this paper, the microchannel heat exchangers with reentrant cavities present better heat transfer performance and smaller pressure drop. A microchannel heat exchanger with trapezoidal-shaped cavities has best heat transfer performance, and a microchannel heat exchanger with fan-shaped cavities has the smallest pressure drop. Research limitations/implications The fluid is incompressible and the inlet temperature is constant. Practical implications It is an effective way to enhance heat transfer and reduce pressure drop by adding cavities in microchannels and the data will be helpful as guidelines in the selection of reentrant cavities. Originality/value This paper provides the pressure drop and heat transfer performance analysis of microchannel heat exchangers with various reentrant cavities, which can provide reference for heat transfer augmentation of an existing microchannel heat exchanger in a thermal design.

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Monahan, Kevin M., Joseph Zebede, Mark E. Josephson, and Claudio D. Schuger. "Systematic characterization of the reentrant circuit during atrioventricular nodal reentrant tachycardia." American Journal of Cardiology 76, no. 3 (July 1995): 138–43. http://dx.doi.org/10.1016/s0002-9149(99)80045-9.

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Journal articles on the topic 'Reentrancy'

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