bluuebunny/crossref_metadata_2025_split huggingface dataset:
Adaptive sliding‐mode control for Mars entry trajectory tracking with finite‐time convergence
Authors: Shen Ganghui , Xia Yuanqing , Ma Dailiang , Zhang Jinhui 
Published: December 2018

SummaryThis paper presents a novel adaptive sliding‐mode control (ASMC) method for Mars entry guidance and the finite‐time convergence in the presence of large uncertainties can be guaranteed. With the help of gain adaptive law, the nonoverestimating value of control gains can be achieved, and then, the chattering can be attenuated by the proposed ASMC method. Meanwhile, the extended state observer is introduced to estimate and compensate for uncertainties and the nonoverestimating problem is resolved further. In addition, the proposed method does not require any knowledge on the upper bound of uncertainty, which yields to be used in practical systems. Finally, the numerical simulation results are given to demonstrate the effectiveness of the proposed guidance law.
Robust nonfragile observer‐based control of switched discrete singular systems with time‐varying delays: A sliding mode control design
Authors: Han Yueqiao , Kao Yonggui , Park Ju H. 
Published: December 2018

SummaryThis paper is devoted to the robust
sliding mode control issue for a type of switched discrete singular systems with time‐varying delays under arbitrary switching. Since the system states are not available, the nonfragile observer strategy is used to generate the state estimation. By designing a novel sliding surface function, which is established on the estimation, new sufficient conditions via linear matrix inequalities are derived so that the closed‐loop system is admissible with an
disturbance attenuation level γ. Furthermore, sliding mode controllers are given to guarantee the reachability of the quasi‐sliding mode and weaken the chattering. At last, examples are presented to verify the validity of our provided approach.
CCM‐SLAM: Robust and efficient centralized collaborative monocular simultaneous localization and mapping for robotic teams
Authors: Schmuck Patrik , Chli Margarita 
Published: December 2018

AbstractRobotic collaboration promises increased robustness and efficiency of missions with great potential in applications, such as search‐and‐rescue and agriculture. Multiagent collaborative simultaneous localization and mapping (SLAM) is right at the core of enabling collaboration, such that each agent can colocalize in and build a map of the workspace. The key challenges at the heart of this problem, however, lie with robust communication, efficient data management, and effective sharing of information among the agents. To this end, here we present CCM‐SLAM, a centralized collaborative SLAM framework for robotic agents, each equipped with a monocular camera, a communication unit, and a small processing board. With each agent able to run visual odometry onboard, CCM‐SLAM ensures their autonomy as individuals, while a central server with potentially bigger computational capacity enables their collaboration by collecting all their experiences, merging and optimizing their maps, or disseminating information back to them, where appropriate. An in‐depth analysis on benchmarking datasets addresses the scalability and the robustness of CCM‐SLAM to information loss and communication delays commonly occurring during real missions. This reveals that in the worst case of communication loss, collaboration is affected, but not the autonomy of the agents. Finally, the practicality of the proposed framework is demonstrated with real flights of three small aircraft equipped with different sensors and computational capabilities onboard and a standard laptop as the server, collaboratively estimating their poses and the scene on the fly.
Optimal vertical configuration of combined energy dissipation outriggers
Authors: Xing Lili , Zhou Ying , Aguaguiña Mario 
Published: December 2018

SummaryThe damped outrigger system emerged as an improvement of the conventional outriggers with the aim to provide supplemental damping and to contribute to the vibration control in super tall buildings where this system is usually applied. In addition to viscous dampers (VDs), buckling‐restrained braces (BRBs) have also been employed as energy dissipating members in outriggers. Nevertheless, the combined use of outriggers with VDs and BRBs in the same structure has not yet been studied. Such combination can contribute to achieve an effective multiperformance design of super tall buildings. This paper presents a study whose main objective was to determine the optimal vertical combination of two types of energy dissipation outriggers to control the seismic responses of a 9‐zone super tall model structure. Outriggers with VDs (OVDs) and outriggers with BRBs (OBRBs) were placed at the different zones of the structure considering all the possible combinations and in configurations of up to four outriggers. The effects of these combinations on the seismic performance of the structure were studied through parametric analysis and optimization methods. This form of the outrigger system is defined in this paper as combined energy dissipation outrigger system. The results indicate that when two energy dissipation outriggers are used, the combination of OBRB plus OVD shows superior seismic performance compared with other double‐outrigger configurations. In addition, the results show that the locations of OVDs and OBRBs play an important role in the structure behavior; it was found that it is more beneficial to place OBRBs above OVDs.
Multiobjective optimal placement of active tendons to control irregular multistory buildings with soil–structure interaction
Authors: Nazarimofrad Ebrahim , Farahani Sina , Zahrai Seyed Mehdi 
Published: December 2018

SummaryIn recent decades, many researchers have conducted research studies on structural control to improve the safety and serviceability of high‐rise buildings against earthquakes and strong winds. On the other hand, applying active control systems and controlling strategies in buildings are costly process, and it is necessary to reduce the number of controllers.In this paper, a multiobjective genetic algorithm is proposed to optimize the placement of active tendons in a 2D shear frame and a 3D irregular building considering soil–structure interaction effect to reduce active control cost and response of structures at the same time. For multiobjective optimization, multiobjective genetic algorithm of the MATLAB toolbox is used to find a set of Pareto optimal solutions for a multiobjective minimization. The results indicate that the method is capable of finding the number and location of the required active tendons in both 2D shear frame and 3D irregular building with 10 and 20 stories while the base shear of structure is minimized. The specific advantage of the employed algorithms is to reduce the number of mounted active tendons approximately by 50%.
Research domain criteria from neuroconstructivism: A developmental view on mental disorders
Authors: Campos Ruth , Nieto Carmen , Núñez María 
Published: December 2018

Neuroconstructivism can provide Research Domain Criteria (RDoC) with a developmental framework to understand mental disorders. Neuroconstructivism proposes that mental disorders are the outcome of a developmental trajectory. Based on this assumption, symptoms would reveal the system's adaptation to optimize functioning according to the system's experience of the physical and social contexts. RDoC adopts a translational research approach with the aim of detecting, curing, and preventing mental illness. More specifically this involves to: (a) identify early signs of mental disorders, (b) find the optimal patient‐treatment fit, and (c) design efficient interventions to prevent the system's eventual pathological functioning. We propose that meeting RDoC's threefold objective necessarily involves predicting the system's developmental trajectory. Such endeavor requires counting with assessment tools that are sensitive to both the process of development and its different contexts; the measures provided by these tools will allow identifying the risk and protective factors that make the system vulnerable to depart from a typical developmental trajectory. Including vectors relative to time and contexts in a relevant part of the matrix will make of RDoC a truly integrative model, which considers the relationships between behavior and neural circuits throughout the developmental pathway.This article is categorized under:

Psychology > Brain Function and Dysfunction
Neuroscience > Clinical Neuroscience
Neuroscience > Development
Big data processing tools: An experimental performance evaluation
Authors: Rodrigues Mário , Santos Maribel Yasmina , Bernardino Jorge 
Published: December 2018

Big Data is currently a hot topic of research and development across several business areas mainly due to recent innovations in information and communication technologies. One of the main challenges of Big Data relates to how one should efficiently handle massive volumes of complex data. Due to the notorious complexity of the data that can be collected from multiple sources, usually motivated by increasing data volumes gathered at high velocity, efficient processing mechanisms are needed for data analysis purposes. Motivated by the rapid growth in technology, development of tools, and frameworks for Big Data, there is much discussion about Big Data querying tools and, specifically, those that are more appropriated for specific analytical needs. This paper describes and evaluates the following popular Big Data processing tools: Drill, HAWQ, Hive, Impala, Presto, and Spark. An experimental evaluation using the Transaction Processing Council (TPC‐H) benchmark is presented and discussed, highlighting the performance of each tool, according to different workloads and query types.This article is categorized under:
Technologies > Computer Architectures for Data Mining
Fundamental Concepts of Data and Knowledge > Big Data Mining
Technologies > Data Preprocessing
Application Areas > Data Mining Software Tools
TONUITY: A NOVEL INDIVIDUAL-ORIENTED RETIREMENT PLAN
Authors: Chen An , Hieber Peter , Klein Jakob K. 
Published: December 2018

AbstractFor insurance companies in Europe, the introduction of Solvency II leads to a tightening of rules for solvency capital provision. In life insurance, this especially affects retirement products that contain a significant portion of longevity risk (e.g., conventional annuities). Insurance companies might react by price increases for those products, and, at the same time, might think of alternatives that shift longevity risk (at least partially) to policyholders. In the extreme case, this leads to so-called tontine products where the insurance company’s role is merely administrative and longevity risk is shared within a pool of policyholders. From the policyholder’s viewpoint, such products are, however, not desirable as they lead to a high uncertainty of retirement income at old ages. In this article, we alternatively suggest a so-called tonuity that combines the appealing features of tontine and conventional annuity. Until some fixed age (the switching time), a tonuity’s payoff is tontine-like, afterwards the policyholder receives a secure payment of a (deferred) annuity. A tonuity is attractive for both the retiree (who benefits from a secure income at old ages) and the insurance company (whose capital requirements are reduced compared to conventional annuities). The tonuity is a possibility to offer tailor-made retirement products: using risk capital charges linked to Solvency II, we show that retirees with very low or very high risk aversion prefer a tontine or conventional annuity, respectively. Retirees with medium risk aversion, however, prefer a tonuity. In a utility-based framework, we therefore determine the optimal tonuity characterized by the critical switching time that maximizes the policyholder’s lifetime utility.
Hegel’s Critique of Greek Ethical Life
Authors: Loy David W. 
Published: December 2018

AbstractHegel was attracted to the Greek ideal, but he ultimately rejected it as a model for the modern world. This article discusses four deficiencies he identified in ancient Greek ethical life: the immediate relationship between the subjective will of the individual and the ethical norms of thepolis, the absence of institutions that mediated citizens’ private goals with thepolis, the deficient conception of the human being which underlay slavery, and the granting of recognition on the basis of natural categories rather than politically integrative norms. These deficiencies explain not only why Hegel thought the Greekpolishad to disintegrate under the onslaught of subjective particularity, but also why he rejected the Greek ideal as a model of social membership for modern ethical life. In addition, they illuminate his rejection of Fries and provide grounds for criticizing Rousseau. His account of the highly articulated modern state represents a response to the question of how the deficiencies of Greek ethical life can be overcome.
VOTING THEIR CONSCIENCE: POVERTY, EDUCATION, SOCIAL PRESSURE AND VOTE BUYING IN INDONESIA
Authors: Pradhanawati Ari , Tawakkal George Towar Ikbal , Garner Andrew D. 
Published: December 2018

AbstractWhen citizens are offered cash and gifts by candidates, they can either vote for candidates offering the money, refuse the money, or take the money and vote for whichever candidate they prefer (e.g., “vote their conscience”). Which citizens “vote their conscience” versus the other options available to them? This manuscript examines the effect of poverty, education, and social pressure on how citizens in the Central Java city of Semarang, Indonesia react to offers of cash from politicians. We find that poverty and education interact to create important and interesting patterns of responses. The citizens most likely to “vote their conscience” are those with lower income yet higher levels of formal education whereas higher income, more highly educated citizens are most likely to refuse the money. We also examine factors that create social pressure for citizens to “sell” their votes by supporting the candidates offering cash.
Multi-Scale Analysis of Thermo-Mechanical Properties of 2.5D Angle-Interlock Woven Shape Memory Polymer Composites
Authors: Sun H. Y. , Gu J. P. , Tang Y. , Xie Z. M. 
Published: December 2018

ABSTRACTA multi-scale strategy is employed in the paper to investigate the thermo-mechanical properties of 2.5D angle-interlock woven shape memory polymer composites (SMPCs). In the study, the mesoscopic model of 2.5D woven SMPCs and microscopic model of yarns are firstly developed. After that, the themo-viscoelastic constitutive relationship of the yarn is described in the form of hereditary integral and the parameters of relaxation moduli are obtained from nonlinear fitting of Prony series based on the results of finite element method (FEM). Based on the multi-scale models and the constitutive relationship, the effects of warp and weft arranged densities on viscoelastic properties of 2.5D woven SMPCs are studied in detail. Finally, the shape memory behavior along the warp direction in small strain region is also analyzed. The research in the paper lays a foundation for design and application of woven SMPCs in engineering.
New Olonbulukia material and its related assemblage reveal an early radiation of stem Caprini along the north of the Tibetan Plateau
Authors: Wang Shi-Qi , Yang Qing , Zhao Ya , Li Chun-Xiao , Shi Qin-Qin , Zong Li-Yi , Ye Jie 
Published: December 2018

AbstractLiving Caprini are dominant bovids in the pan-Tibetan area that are strongly adapted to dry steppe and high-mountain meadow habitats. Some taxa with Holarctic distributions, e.g., Ovis Linnaeus, 1758, were thought to originate on the Tibetan Plateau and subsequently dispersed elsewhere, which was depicted as an ‘out of Tibet’ story. However, except for some information on a stem caprine assemblage from the Qaidam Basin, the early evolution of Caprini around the Tibetan Plateau is poorly known. Here, we report new material of Olonbulukia tsaidamensis Bohlin, 1937, which was a member of this stem caprine assemblage, from the Wuzhong region, northern China, confirming the similarity of the Wuzhong Fauna and ‘Qaidam Fauna.’ Based on a biometric study of horncores from the ‘Qaidam’ and Wuzhong faunas, we recognize six taxa from this stem caprine assemblage: O. tsaidamensis, O. sp., Qurliqnoria cheni Bohlin, 1937, Tossunnoria pseudibex Bohlin, 1937, ?Protoryx cf. P. enanus Köhler, 1987, and cf. Pachytragus sp. Among these taxa, Q. cheni and T. pseudibex are probably related to some extant Tibetan endemic species, e.g., the Tibetan antelope, Pantholops hodgsonii (Abel, 1826), and the Himalayan tahr, Hemitragus jemlahicus (Smith, 1826). Others might be ancestral to the Turolian caprine assemblages and even possibly gave rise to the extant Caprina. This work reveals an early radiation of stem caprines along the northern side of the rising Tibetan Plateau and indicates a mixed pattern of pan-Tibetan stem caprine evolution prior to their dispersal out of the Tibetan Plateau.
Lungfish tooth plates (Sarcopterygii, Dipnoi) from the Late Cretaceous (Santonian) Eutaw Formation of Alabama and Mississippi, USA
Authors: Harrell T. Lynn , Ehret Dana J. 
Published: December 2018

AbstractLungfish are a poorly represented component of the Mesozoic fossil record in North America, as most lungfish fossils consist of rare, isolated dental plates that are of little diagnostic value due to their conservative nature. In eastern North America, the paucity of lungfish fossils in Late Cretaceous strata is further compounded by the occurrence of geologic units that are primarily marine in origin, unlike the Late Jurassic to mid-Cretaceous fluvial deposits of the American west that contain comparatively more specimens. Lungfish fossils from the eastern side of the Late Cretaceous Western Interior Seaway (Appalachia) have previously been reported from the Cenomanian Woodbine Formation of northeast Texas and the Campanian Mount Laurel Formation of New Jersey. Here we report two new occurrences of eastern North American lungfish tooth plates from the Santonian Eutaw Formation of Alabama and Mississippi. These two specimens are referred toCeratodus frazieriOstrom, 1970 andCeratodus carteriMain et al., 2014, species that are better known from the mid-Cretaceous of the Western Interior of North America. This discovery is the first published record of lungfish of any age from the states of Alabama and Mississippi. It partially bridges the temporal gap in the fossil record between the Cenomanian lungfish of Texas and the Campanian lungfish of New Jersey and extends the biogeographic range of Late Cretaceous lungfish to the eastern Gulf Coastal Plain of the United States.
DICHOTOMY PROPERTY FOR MAXIMAL OPERATORS IN A NONDOUBLING SETTING
Authors: KOSZ DARIUSZ 
Published: December 2018

We investigate a dichotomy property for Hardy–Littlewood maximal operators, noncentred
$M$
and centred
$M^{c}$
, that was noticed by Bennett et al. [‘Weak-
$L^{\infty }$
and BMO’, Ann. of Math. (2) 113 (1981), 601–611]. We illustrate the full spectrum of possible cases related to the occurrence or not of this property for
$M$
and
$M^{c}$
in the context of nondoubling metric measure spaces
$(X,\unicode[STIX]{x1D70C},\unicode[STIX]{x1D707})$
. In addition, if
$X=\mathbb{R}^{d}$
,
$d\geq 1$
, and
$\unicode[STIX]{x1D70C}$
is the metric induced by an arbitrary norm on
$\mathbb{R}^{d}$
, then we give the exact characterisation (in terms of
$\unicode[STIX]{x1D707}$
) of situations in which
$M^{c}$
possesses the dichotomy property provided that
$\unicode[STIX]{x1D707}$
satisfies some very mild assumptions.
AN ANIMATING PRINCIPLE IN CONFRONTATION WITH CHRISTIANITY? DE(RE)CONSTRUCTING THE NAHUA “SOUL”
Authors: Olko Justyna , Madajczak Julia 
Published: December 2018

Abstract-Yoliais one of the principal indigenous terms present in Christian Nahua terminology in the first decades of European contact. It is employed for “soul” or “spirit” and often forms a doublet withánimain Nahuatl texts of an ecclesiastical, devotional, or secular nature. The term-yolia/teyoliahas also lived a rich and fascinating life in scholarly literature. Its etymology (“the means for one's living”) is strikingly similar to that of the Spanish wordánima, or “soul.” Taking into account the possibility that attestations of the seemingly pre-Hispanic-yoliacan be identified in some of the written sources, we have reviewed historical, linguistic, and anthropological evidence concerning this term in order to revisit the Nahua concept of the “soul.” We also scrutinize the very origin of-yoliain academic discourse. This analysis, based on broader historical and linguistic evidence referring to both pre-Conquest beliefs and Christianization in sixteenth-century central Mexico, is the point of departure for proposing and substantiating an alternative hypothesis about the origin of-yolia. Our precise focus has been to trace and pinpoint a pervasive Christian influence, manifest both in indigenous Colonial texts and conceptual frameworks of modern scholars interpreting them. We conclude that -yoliais a neologism created in the early Colonial period.
Unilateral unidirectional superior cavopulmonary anastomosis in a patient with bilateral superior caval veins and atretic left pulmonary artery
Authors: Talwar Sachin , Yadav Mayank , Choudhary Shiv Kumar 
Published: December 2018

AbstractA unidirectional superior cavopulmonary anastomosis was performed on the right side in a patient with a functionally univentricular heart, atresia of main and left pulmonary artery, bilateral superior caval veins, and a patent arterial duct in the right pulmonary artery. Anastomosis of the left superior caval vein to the right superior caval vein created a neo-innominate vein without using prosthetic material.
Aborted sudden cardiac death in a young soldier with concomitant hypertrophic cardiomyopathy and Wolff–Parkinson–White syndrome
Authors: Kim Sunwon , Song Woo Hyuk , Kim Sung Soon 
Published: December 2018

AbstractWe present a young soldier presenting with aborted sudden cardiac death, who was found to have concomitant hypertrophic cardiomyopathy and Wolff–Parkinson–White syndrome. Along with pathological haemodynamic features of hypertrophic cardiomyopathy, an easily-inducible re-entrant tachycardia was clearly documented in our patient. Given the fatal potential of supraventricular tachycardia in hypertrophic cardiomyopathy, we postulated that his tachyarrhythmia could potentially trigger the event. Upon his refusal to receive implantable cardioverter/defibrillator therapy, we ablated anatomical arrhythmogenic substrate instead, and he remained uneventfully over 3 years on β-blocker.