bluuebunny/crossref_metadata_2025 huggingface dataset:
A Fleet of MEC UAVs to Extend a 5G Network Slice for Video Monitoring with Low-Latency Constraints
Authors: Grasso Christian , Schembra Giovanni
Published: January 2019

In the last decade, video surveillance systems have become more and more popular. Thanks to a decrease in price of video camera devices and the diffusion of cheap small unmanned aerial vehicles (UAVs), video monitoring is today adopted in a wide range of application cases, from road traffic control to precision agriculture. This leads to capture a great amount of visual material to be monitored and screened for event detection. However, information that is gathered from a platform of video monitoring UAVs may produce high-volume data, whose processing is unfeasible to be done locally by the same UAVs that perform monitoring. Moreover, because of the limited bandwidth of wireless links connecting UAVs to computing infrastructures that are installed on ground, offloading these data to edge clouds renders these platforms infeasible for video analysis applications with low-latency requirements. The target of this paper is to extend a 5G network slice for video monitoring with a Flying Ad-hoc NETwork (FANET) constituted by UAVs with multi-access edge computing (MEC) facilities (MEC UAVs), flying very close to the layer of UAVs monitoring the area of interest. A policy for mutual help among MEC UAVS is defined in order to increase the performance of the whole aerial MEC platform, so further reducing end-to-end latency between sources and actuators, and increasing system reliability. A use case is considered for a numerical analysis of the proposed platform.
Impact of Multi-Sensor Technology for Enhancing Global Security in Closed Environments Using Cloud-Based Resources
Authors: Altowaijri Saleh , Ayari Mohamed , El Touati Yamen
Published: January 2019

By nature, some jobs are always in closed environments and employees may stay for long periods. This is the case for many professional activities such as military watch tours of borders, civilian buildings and facilities that need efficient control processes. The role assigned to personnel in such environments is usually sensitive and of high importance, especially in terms of security and protection. With this in mind, we proposed in our research a novel approach using multi-sensor technology to monitor many safety and security parameters including the health status of indoor workers, such as those in watchtowers and at guard posts. In addition, the data gathered for those employees (heart rate, temperature, eye movement, human motion, etc.) combined with the room’s sensor data (temperature, oxygen ratio, toxic gases, air quality, etc.) were saved by appropriate cloud services, which ensured easy access to the data without ignoring the privacy protection aspect of such critical material. This information can be used later by specialists to monitor the evolution of the worker’s health status as well as its cost-effectiveness, which gives the possibility to improve productivity in the workplace and general employee health.
Can Multifunctional Landscapes Become Effective Conservation Strategies? Challenges and Opportunities From a Mexican Case Study
Authors: Ros-Cuéllar Julia , Porter-Bolland Luciana , Bonilla-Moheno Martha
Published: January 2019

Protected Areas (PA) are the main strategy for nature conservation. However, PA are not always efficient for ecological conservation and social wellbeing. A possible alternative for conservation in human-dominated landscapes are Multifunctional Landscapes (ML), which allow the coexistence of multiple objectives, such as nature conservation and resource use. Using the activity system framework, we analyzed whether the ML concept was an operative alternative to PA within an area of interest for conservation in Veracruz, Mexico. Activity systems refer to the set of productive strategies that result from the mobilization of resources and which, within particular environmental governance contexts, shape the landscape. To understand the challenges and opportunities of our case study, we: (1) delimited the landscape according to local conservation interests; and (2) analyzed the role of stakeholders in shaping this landscape. The delimited landscape included areas considered wildlife reservoirs and water provisioning zones. Our results suggested that the existence of local conservation areas (private and communal), combined with shaded-coffee agroforestry practices, made this region an example of ML. Although local conservation initiatives are perceived as more legitimate than top-down approaches, agreements amongst stakeholders are essential to strengthen environmental governance. In specific socio-ecological contexts, ML can be effective strategies for conservation through agroecosystems that maintain a high-quality landscape matrix, allowing nature preservation and delivering economic benefits.
Scaffolding Embodied Access for Categorization in Interactions between a Blind Child and Her Mother
Authors: Rickard Carolyn , Strother Mara , Fox Barbara A. , Raymond Chase Wesley
Published: January 2019

During language acquisition, sighted children have immediate and temporally stable access to the ‘gestalt’ of an object, including particular features that suggest its categorization as part of a class of objects. Blind children, however, must effectively and productively constitute the whole object from its constitutive parts in order to categorize them. While prior studies have suggested that varied experience and appropriate sensory access can contribute to this process, little attention has been given to how this is accomplished. The present study aims to address this issue by using conversation analysis to explore embodied understanding and categorization work between a 26-month-old congenitally blind child and her sighted mother as they play with various animal toys. Here we provide an analysis of a segment involving a particular toy (a cow plush), and ask two questions: (1) During play, how does Mother scaffold embodied routines for the identification of criterial information about a category, and (2) How is knowledge of varied exemplars, not directly accessible within the current activity, then made available to the child? Detailed examination of the linguistic and embodied practices employed by this mother–child dyad provides a concrete example of how non-visual modalities help scaffold the learning of categorization techniques, as well as illustrates the import that the examination of naturally occurring social interaction can have for theories of language and embodied cognition.
Complex Intuitionistic Fuzzy Graphs with Application in Cellular Network Provider Companies
Authors: Yaqoob Naveed , Gulistan Muhammad , Kadry Seifedine , Wahab Hafiz Abdul
Published: January 2019

In recent years, a mathematical approach of blending different aspects is on the way, which as a result gives a more generalized approach. Following the above mathematical approach, we combine two very powerful techniques, namely complex intuitionistic fuzzy sets and graph theory, and introduce the notion of complex intuitionistic fuzzy graphs. Then, we introduce certain notions including union, join and composition of complex intuitionistic fuzzy graphs, through which one can easily manipulate the complex intuitionistic fuzzy graphs in decision making problems. We elucidate these operations with some examples. We also describe the homomorphisms of complex intuitionistic fuzzy graphs. Finally, we provide an application in cellular network provider companies for the testing of our approach.
Preparation of PVA-Based Hollow Fiber Ion-Exchange Membranes and Their Performance for Donnan Dialysis
Authors: Higa Mitsuru , Kakihana Yuriko , Sugimoto Takehiro , Toyota Kakuya
Published: January 2019

Hollow fiber type cation-exchange (C-HF) membranes and hollow fiber type anion-exchange (A-HF) membranes were prepared from poly (vinyl alcohol) (PVA)-based copolymer with cation-exchange groups and by blending PVA and polycation, respectively, by a gel fiber spinning method. In order to control the water content of the hollow fiber membranes, the membranes were cross-linked physically by annealing, and then cross-linked chemically by using glutaraldehyde (GA) solutions at various GA concentrations. The outer diameter of C-HF and A-HF membranes were ca. 1000 μm and ca. 1500 μm, respectively, and the thickness of the membranes were ca. 170 μm and 290 μm, respectively. Permeation experiments were carried out in two Donnan dialysis systems, which included mixed 0.1 M NaCl and 0.1 M CaCl2/C-HF /3 × 10−4 M CaCl2 and mixed 0.1 M NaCl and 0.1 M NaNO3/A-HF/3 × 10−4 M NaNO3 to examine ionic perm selectivity of the membranes. In the Donnan dialysis experiments using C-HF membranes, uphill transport of the divalent cations occurred, and, in the case of A-HF membranes, uphill transport of NO3− ions occurred. C-HF and A-HF membranes had about half of the flux in the uphill transported ions and also about half of the selectivity between the uphill transport ions and driven ions in comparison with those of the commercial flat sheet cation-exchange membrane (Neosepta® CMX) and anion-exchange membrane (Neosepta® AMX). Yet, IEC of C-HF and A-HF membranes were about one fifth of CMX and less than half of AMX, respectively. Since hollow fiber membrane module will have higher packing density than a flat membrane stack, the hollow fiber type ion-exchange membranes (IEMs) prepared in this study will have a potential application to a Donnan dialysis process.
Dynamically Recrystallized Microstructures, Textures, and Tensile Properties of a Hot Worked High-Mn Steel
Authors: Dolzhenko Pavel , Tikhonova Marina , Kaibyshev Rustam , Belyakov Andrey
Published: January 2019

The deformation microstructures and mechanical properties were studied in a high-Mn steel subjected to hot compression. The deformation microstructures resulted from the development of dynamic recrystallization (DRX). Two DRX mechanisms, namely discontinuous and continuous, operated during warm-to-hot working. Under the conditions of hot working when the flow stresses were below 100 MPa, a power law function was obtained between the DRX grain size and the true flow stress with a grain size exponent of −0.8 owing to the discontinuous DRX. On the other hand, the gradual change in the operating DRX mechanism from a discontinuous to continuous one upon a transition from hot to warm working, when the true flow stress increases above 100 MPa, resulted in the grain size exponent of about −0.5 in the power law between the flow stress and the DRX grain size. The DRX microstructures developed by warm-to-hot working provide a beneficial combination of mechanical properties including high ultimate tensile strength in the range of 700–900 MPa and sufficient ductility with a uniform elongation well above 50%. The strengthening of the samples with DRX microstructures was attributed to the combined effect of the grain size and dislocation strengthening resulting in a rather high grain boundary strengthening factor of 570 MPa μm0.5 in the Hall-Petch-type relationship.
Brain Metabolomics Reveal the Antipyretic Effects of Jinxin Oral Liquid in Young Rats by Using Gas Chromatography–Mass Spectrometry
Authors: Qian Wenjuan , Shan Jinjun , Shen Cunsi , Yang Rui , Xie Tong , Di Liuqing
Published: January 2019

Pyrexia is considered as a part of host’s defense response to the invasion of microorganisms or inanimate matter recognized as pathogenic or alien, which frequently occurs in children. Jinxin oral liquid (JXOL) is a traditional Chinese medicine formula that has been widely used to treat febrile children in China. Experimental fever was induced by injecting yeast into young male Sprague-Dawley rats (80 ± 20 g) and the rectal temperature subsequently changed. Four hours later, the excessive production of interleukin (IL)-1β and prostaglandin (PG) E2 induced by yeast was regulated to normal by JXOL administration. A rat brain metabolomics investigation of pyrexia of yeast and antipyretic effect of JXOL was performed using gas chromatography-mass spectrometry (GC-MS). Clear separation was achieved between the model and normal group. Twenty-two significantly altered metabolites were found in pyretic rats as potential biomarkers of fever. Twelve metabolites, significantly adjusted by JXOL to help relieve pyrexia, were selected out as biomarkers of antipyretic mechanism of JXOL, which were involved in glycolysis, purine metabolism, tryptophan mechanism, etc. In conclusion, the brain metabolomics revealed potential biomarkers in the JXOL antipyretic process and the associated pathways, which may aid in advanced understanding of fever and therapeutic mechanism of JXOL.
Palbociclib and Fulvestrant Act in Synergy to Modulate Central Carbon Metabolism in Breast Cancer Cells
Authors: Warth Benedikt , Palermo Amelia , Rattray Nicholas J.W. , Lee Nathan V. , Zhu Zhou , Hoang Linh T. , Cai Yuping , Mazurek Anthony , Dann Stephen , VanArsdale Todd , Fantin Valeria R. , Shields David , Siuzdak Gary , Johnson Caroline H.
Published: January 2019

The aims of this study were to determine whether combination chemotherapeutics exhibit a synergistic effect on breast cancer cell metabolism. Palbociclib, is a selective inhibitor of cyclin-dependent kinases 4 and 6, and when patients are treated in combination with fulvestrant, an estrogen receptor antagonist, they have improved progression-free survival. The mechanisms for this survival advantage are not known. Therefore, we analyzed metabolic and transcriptomic changes in MCF-7 cells following single and combination chemotherapy to determine whether selective metabolic pathways are targeted during these different modes of treatment. Individually, the drugs caused metabolic disruption to the same metabolic pathways, however fulvestrant additionally attenuated the pentose phosphate pathway and the production of important coenzymes. A comprehensive effect was observed when the drugs were applied together, confirming the combinatory therapy’s synergism in the cell model. This study also highlights the power of merging high-dimensional datasets to unravel mechanisms involved in cancer metabolism and therapy.
The In Vitro Protective Role of Bovine Lactoferrin on Intestinal Epithelial Barrier
Authors: Zhao Xiao , Xu Xiao-Xi , Liu Yang , Xi En-Ze , An Jing-Jing , Tabys Dina , Liu Ning
Published: January 2019

The intestinal epithelial barrier plays a key protective role in the gut lumen. Bovine lactoferrin (bLF) has been reported to improve the intestinal epithelial barrier function, but its impact on tight junction (TJ) proteins has been rarely described. Human intestinal epithelial crypt cells (HIECs) were more similar to those in the human small intestine, compared with the well-established Caco-2 cells. Accordingly, both HIECs and Caco-2 cells were investigated in this study to determine the effects of bioactive protein bLF on their growth promotion and intestinal barrier function. The results showed that bLF promoted cell growth and arrested cell-cycle progression at the G2/M-phase. Moreover, bLF decreased paracellular permeability and increased alkaline phosphatase activity and transepithelial electrical resistance, strengthening barrier function. Immunofluorescence, western blot and quantitative real-time polymerase chain reaction revealed that bLF significantly increased the expression of three tight junction proteins—claudin-1, occludin, and ZO-1—at both the mRNA and protein levels, and consequently strengthened the barrier function of the two cell models. bLF in general showed higher activity in Caco-2 cells, however, HIECs also exhibited desired responses to barrier function. Therefore, bLF may be incorporated into functional foods for treatment of inflammatory bowel diseases which are caused by loss of barrier integrity.
Recent Developments in Tandem White Organic Light-Emitting Diodes
Authors: Xiao Peng , Huang Junhua , Yu Yicong , Liu Baiquan
Published: January 2019

Tandem white organic light-emitting diodes (WOLEDs) are promising for the lighting and displays field since their current efficiency, external quantum efficiency and lifetime can be strikingly enhanced compared with single-unit devices. In this invited review, we have firstly described fundamental concepts of tandem device architectures and their use in WOLEDs. Then, we have summarized the state-of-the-art strategies to achieve high-performance tandem WOLEDs in recent years. Specifically, we have highlighted the developments in the four types of tandem WOLEDs (i.e., tandem fluorescent WOLEDs, tandem phosphorescent WOLEDs, tandem thermally activated delayed fluorescent WOLEDs, and tandem hybrid WOLEDs). Furthermore, we have introduced doping-free tandem WOLEDs. In the end, we have given an outlook for the future development of tandem WOLEDs.
Surface Composition and Preparation Method for Oxygen Nanobubbles for Drug Delivery and Ultrasound Imaging Applications
Authors: Khan Muhammad Saad , Hwang Jangsun , Lee Kyungwoo , Choi Yonghyun , Jang Jaehee , Kwon Yejin , Hong Jong Wook , Choi Jonghoon
Published: January 2019

Phospholipids have been widely investigated for the preparation of liposomes, and micro and nanobubbles. They comprise biocompatible and biodegradable molecules and offer simple preparation with a variety of functions in diagnostic and therapeutic applications. Phospholipids require emulsifiers and surfactants to assemble in the form of bubbles. These surfactants determine the size, zeta potential, and other characteristics of particles. Polyethylene glycol (PEG) and its various derivatives have been employed by researchers to synthesize micro and nanobubbles. The stability of phospholipid-shelled nanobubbles has been reported by various researchers owing to the reduction of surface tension by surfactants in the shell. Nanobubbles have been employed to deliver oxygen to tissues and hypoxic cells. In this study, we investigated the effects of different ratios of phospholipids to PEG on the size, distribution, and characterization of oxygen nanobubbles (ONBs). ONBs were synthesized using a sonication technique. We analyzed and compared the sizes, numbers of generated particles, and zeta potentials of different compositions of ONBs using dynamic light scattering and nanoparticle tracking analysis. Then, we employed these oxygen nanobubbles to enhance the cellular microenvironment and cell viability. ONBs were also investigated for ultrasound imaging.
Inhibition of Wild Enterobacter cloacae Biofilm Formation by Nanostructured Graphene- and Hexagonal Boron Nitride-Coated Surfaces
Authors: Zurob Elsie , Dennett Geraldine , Gentil Dana , Montero-Silva Francisco , Gerber Ulrike , Naulín Pamela , Gómez Andrea , Fuentes Raúl , Lascano Sheila , Rodrigues da Cunha Thiago Henrique , Ramírez Cristian , Henríquez Ricardo , Del Campo Valeria , Barrera Nelson , Wilkens Marcela , Parra Carolina
Published: January 2019

Although biofilm formation is a very effective mechanism to sustain bacterial life, it is detrimental in medical and industrial sectors. Current strategies to control biofilm proliferation are typically based on biocides, which exhibit a negative environmental impact. In the search for environmentally friendly solutions, nanotechnology opens the possibility to control the interaction between biological systems and colonized surfaces by introducing nanostructured coatings that have the potential to affect bacterial adhesion by modifying surface properties at the same scale. In this work, we present a study on the performance of graphene and hexagonal boron nitride coatings (h-BN) to reduce biofilm formation. In contraposition to planktonic state, we focused on evaluating the efficiency of graphene and h-BN at the irreversible stage of biofilm formation, where most of the biocide solutions have a poor performance. A wild Enterobacter cloacae strain was isolated, from fouling found in a natural environment, and used in these experiments. According to our results, graphene and h-BN coatings modify surface energy and electrostatic interactions with biological systems. This nanoscale modification determines a significant reduction in biofilm formation at its irreversible stage. No bactericidal effects were found, suggesting both coatings offer a biocompatible solution for biofilm and fouling control in a wide range of applications.
Noncoherent Decision Fusion over Fading Hybrid MACs in Wireless Sensor Networks
Authors: Liu Shoujun , Wang Kehao , Liu Kezhong , Chen Wei
Published: January 2019

In this paper, we consider the problem of decision fusion for noncoherent detection in a wireless sensor network. Novel to the current work is the integration of the hybrid multi-access channel (MAC) in the fusion rule design. We assume that sensors transmit their local binary decisions over a hybrid MAC which is a composite of conventional orthogonal and nonorthogonal MACs. Under Rayleigh fading scenario, we present a likelihood ratio (LR)-based fusion rule, which has been shown to be optimal through theoretical analysis and simulation. However, it requires a large amount of computation, which is not easily implemented in resource-constrained sensor networks. Therefore, three sub-optimal alternatives with low-complexity are proposed, namely the weighed energy detector (WED), the deflection-coefficient-maximization (DCM), and the two-step (TS) rules. We show that when the channel signal-to-noise ratio (SNR) is low, the LR-based fusion rule reduces to the WED rule; at high-channel SNR, it is equivalent to the TS rule; and at moderate-channel SNR, it can be approached closely by the DCM rule. Compared with the conventional orthogonal and nonorthogonal MACs, numerical results show that the hybrid MAC with the proposed fusion rules can improve the detection performance when the channel SNR is medium.
Advanced Heterogeneous Feature Fusion Machine Learning Models and Algorithms for Improving Indoor Localization
Authors: Zhang Lingwen , Xiao Ning , Yang Wenkao , Li Jun
Published: January 2019

In the era of the Internet of Things and Artificial Intelligence, the Wi-Fi fingerprinting-based indoor positioning system (IPS) has been recognized as the most promising IPS for various applications. Fingerprinting-based algorithms critically rely on a fingerprint database built from machine learning methods. However, currently methods are based on single-feature Received Signal Strength (RSS), which is extremely unstable in performance in terms of precision and robustness. The reason for this is that single feature machines cannot capture the complete channel characteristics and are susceptible to interference. The objective of this paper is to exploit the Time of Arrival (TOA) feature and propose a heterogeneous features fusion model to enhance the precision and robustness of indoor positioning. Several challenges are addressed: (1) machine learning models based on heterogeneous features, (2) the optimization of algorithms for high precision and robustness, and (3) computational complexity. This paper provides several heterogeneous features fusion-based localization models. Their effectiveness and efficiency are thoroughly compared with state-of-the-art methods.
A Switched-Element System Based Direction of Arrival (DOA) Estimation Method for Un-Cooperative Wideband Orthogonal Frequency Division Multi Linear Frequency Modulation (OFDM-LFM) Radar Signals
Authors: Liu Yifei , Zhao Yuan , Zhu Jun , Wang Jun , Tang Bin
Published: January 2019

This paper proposes a switched-element direction finding (SEDF) system based Direction of Arrival (DOA) estimation method for un-cooperative wideband Orthogonal Frequency Division Multi Linear Frequency Modulation (OFDM-LFM) radar signals. This method is designed to improve the problem that most DOA algorithms occupy numbers of channel and computational resources to handle the direction finding for wideband signals. Then, an iterative spatial parameter estimator is designed through deriving the analytical steering vector of the intercepted OFDM-LFM signal by the SEDF system, which can remarkably mitigate the dispersion effect that is caused by high chirp rate. Finally, the algorithm flow and numerical simulations are given to corroborate the feasibility and validity of our proposed DOA method.
Design and Analysis of Two Piezoelectric Cymbal Transducers with Metal Ring and Add Mass
Authors: Wang Wenjie , Shi Weihao , Thomas Peter , Yang Mingsui
Published: January 2019

Based on traditional sandwich structure, two piezoelectric transducers were designed to meet the strict underwater application backgrounds such as high pressure, corrosion resistance, and high strength. Both transducers integrated most of previous researches while one transducer has a multilayer cavity structure which is different from the other structure and previous transducer structures. After a detailed simulation analysis of every structural parameter, key parameters were pointed out to have an obvious influence on its performance. Then, two models were constructed and compared with chosen sets of geometry parameters and manufacturing process, which can also provide a reference for low-frequency transducer design. The simulation results and experimental results of our transducers show a good consistency which indicates the cavity structure can reduce the resonance frequency.
Dynamically Reconfigurable Encryption and Decryption System Design for the Internet of Things Information Security
Authors: Wang Zhu , Yao Yan , Tong Xiaojun , Luo Qinghua , Chen Xiangyu
Published: January 2019

Information security is the foundation for building trust between the Internet of Things (IoT) and its users. Due to the sharp increase of information quantity and the limitation of hardware resources, it is difficult to maintain the high performance of hardware equipment, while also enhancing information security. To solve the problem of high consumption and low flexibility of multiple cryptographic algorithms hardware implementation, we have designed the Dynamically Reconfigurable Encryption and Decryption System, which is based on Field Programmable Gate Array. Considering the functional requirements, the cryptographic algorithm reconfigurable module files stored in External Memory could be configured dynamically into the assigned on-chip Reconfigurable Partition, supported by Core Controller and the Reconfiguration Control Platform. The experiment results show that, compared with the Static Encryption and Decryption System, our design reduces the logic resources by more than 30% and completes the algorithm swapping at the configuration speed of 15,759.51 Bytes/ms. It indicates that our design could reduce logic resources consumption and improve utilization efficiency and system flexibility.
Kalman Filtering for Attitude Estimation with Quaternions and Concepts from Manifold Theory
Authors: Bernal-Polo Pablo , Martínez-Barberá Humberto
Published: January 2019

The problem of attitude estimation is broadly addressed using the Kalman filter formalism and unit quaternions to represent attitudes. This paper is also included in this framework, but introduces a new viewpoint from which the notions of “multiplicative update” and “covariance correction step” are conceived in a natural way. Concepts from manifold theory are used to define the moments of a distribution in a manifold. In particular, the mean and the covariance matrix of a distribution of unit quaternions are defined. Non-linear versions of the Kalman filter are developed applying these definitions. A simulation is designed to test the accuracy of the developed algorithms. The results of the simulation are analyzed and the best attitude estimator is selected according to the adopted performance metric.
A Cross-Layer Routing Protocol Based on Quasi-Cooperative Multi-Agent Learning for Multi-Hop Cognitive Radio Networks
Authors: Du Yihang , Chen Chun , Ma Pengfei , Xue Lei
Published: January 2019

Transmission latency minimization and energy efficiency improvement are two main challenges in multi-hop Cognitive Radio Networks (CRN), where the knowledge of topology and spectrum statistics are hard to obtain. For this reason, a cross-layer routing protocol based on quasi-cooperative multi-agent learning is proposed in this study. Firstly, to jointly consider the end-to-end delay and power efficiency, a comprehensive utility function is designed to form a reasonable tradeoff between the two measures. Then the joint design problem is modeled as a Stochastic Game (SG), and a quasi-cooperative multi-agent learning scheme is presented to solve the SG, which only needs information exchange with previous nodes. To further enhance performance, experience replay is applied to the update of conjecture belief to break the correlations and reduce the variance of updates. Simulation results demonstrate that the proposed scheme is superior to traditional algorithms leading to a shorter delay, lower packet loss ratio and higher energy efficiency, which is close to the performance of an optimum scheme.
How Political Perceptions Affect Attitudes Toward Tourism: A Study of Chinese Generations
Authors: Qiu Shangzhi (Charles) , Zhang Yunzi , Cai Liping
Published: January 2019

Based on the case of Chinese tourists' travel to Japan, this study is aimed at providing more insight on the relationship between international politics and travel decisions. This study identifies the generational gaps of attitudinal structure between the Chinese Cohort 60 (CC 60) and
Chinese Post-80s (CP 80) based on the textual data collected through in-depth interviews with two generations of Chinese tourists. The fluctuation of Chinese tourist arrivals in Japan following diplomatic incidents suggests that Sino–Japanese historical and contemporary political incidents
may have an effect on tourism attitude. Result indicated that the association between the attitudes toward tourism, Japan, and political incidents are stronger for CC 60 than for CP 80. Compared with CP 80, CC 60 tourists hold stronger stereotype and prejudice toward the Japanese, as well
as experience considerable pressure from anti-Japanese social norm, thereby producing cognitive dissonance for those interested in visiting Japan. CP 80 hold more neutral attitude toward Japan tourism and their intention to travel to Japan is less influenced by their attitude toward this country
and the historical incidents. The findings have implication on sustainable Sino–Japan tourism and pointed out the important role of political incidents in tourist behavior.
Residents' Place Image: Place to Live Versus Tourist Destination
Authors: Stylidis Dimitrios
Published: January 2019

Despite growing attention given to the notion of place, research focusing on the resident perspective is still fragmented, with some studies exploring the image of a place as a place to live in (city image) and others as a tourist destination. Aiming to bridge existing streams of research,
this study explores the capacity of established image dimensions to predict residents' image of their place as a) a place to live in and b) a tourist destination. Data were collected from a sample of 368 residents of Eilat, Israel. Findings suggest that the social environment, natural environment,
and accessibility were the most important antecedents of residents' city image, whereas social environment, amenities, and attractions were the most important determinants of residents' destination image. The findings advance knowledge on place image conceptualization, offering practical insights
for developing a place both as a place to live in and as a tourist destination.
CONVERGENCE ORDER IN TRAJECTORY ESTIMATION BY PIECEWISE-CUBICS AND EXPONENTIAL PARAMETERIZATION
Authors: Wilkołazka Magdalena , Kozera Ryszard
Published: January 2019

This paper discusses the problem of estimating the trajectory of the unknown curve γ from the sequence of m+1 interpolation points in arbitrary Euclidean space En . The respective knots (in ascending order) are assumed to be unknown. Such Qm is coined reduced data. In our setting, a piecewise-cubic Lagrange interpolation is applied to fit Qm. Here, the missing knots Ƭm are replaced by their estimates in accordance with the exponential parameterization. The latter is controlled by a single parameter λ ∈ [0, 1]. This work analyzes the intrinsic asymptotics in approximating γ by ŷ3 based on the exponential parameterization and Qm. The multiple goals are achieved. Firstly, the existing result established for λ = 1 (i.e. for the cumulative chord parameterization) is extended to the remaining cases of λ ∈ [0, 1) and more-or-less uniformly sampled Qm. As demonstrated herein, a quartic convergence order α(1) = 4 in trajectory estimation drops discontinuously to the linear one α(λ) = 1, for all λ ∈ [0, 1). Secondly, the asymptotics derived in this paper is also analytically proved to be sharp with the aid of illustrative examples. Thirdly, the latter is verified in affirmative upon conducting numerical testing. Next, the necessity of more-or-less uniformity imposed on Qm is shown to be indispensable. In addition, several sufficient conditions for ŷ3 to be reparameterizable to the domain of γ are formulated. Lastly, the motivation for using the exponential parameterization with λ ∈ [0, 1) is also outlined.
Deep Exploration of ϵ Eridani with Keck Ms-band Vortex Coronagraphy and Radial Velocities: Mass and Orbital Parameters of the Giant Exoplanet*
Authors: Mawet Dimitri , Hirsch Lea , Lee Eve J. , Ruffio Jean-Baptiste , Bottom Michael , Fulton Benjamin J. , Absil Olivier , Beichman Charles , Bowler Brendan , Bryan Marta , Choquet Elodie , Ciardi David , Christiaens Valentin , Defrère Denis , Gomez Gonzalez Carlos Alberto , Howard Andrew W. , Huby Elsa , Isaacson Howard , Jensen-Clem Rebecca , Kosiarek Molly , Marcy Geoff , Meshkat Tiffany , Petigura Erik , Reggiani Maddalena , Ruane Garreth , Serabyn Eugene , Sinukoff Evan , Wang Ji , Weiss Lauren , Ygouf Marie
Published: January 2019

We present the most sensitive direct imaging and radial velocity (RV) exploration of ϵ Eridani to date. ϵ Eridani is an adolescent planetary system, reminiscent of the early solar system. It is surrounded by a prominent and complex debris disk that is likely stirred by one or several gas giant exoplanets. The discovery of the RV signature of a giant exoplanet was announced 15 yr ago, but has met with scrutiny due to possible confusion with stellar noise. We confirm the planet with a new compilation and analysis of precise RV data spanning 30 yr, and combine it with upper limits from our direct imaging search, the most sensitive ever performed. The deep images were taken in the Ms band (4.7 μm) with the vortex coronagraph recently installed in W.M. Keck Observatory’s infrared camera NIRC2, which opens a sensitive window for planet searches around nearby adolescent systems. The RV data and direct imaging upper limit maps were combined in an innovative joint Bayesian analysis, providing new constraints on the mass and orbital parameters of the elusive planet. ϵ Eridani b has a mass of

M
Jup and is orbiting ϵ Eridani at about 3.48 ± 0.02 au with a period of 7.37 ± 0.07 yr. The eccentricity of ϵ Eridani b’s orbit is

, an order of magnitude smaller than early estimates and consistent with a circular orbit. We discuss our findings from the standpoint of planet–disk interactions and prospects for future detection and characterization with the James Webb Space Telescope.
The AGN Ionization Cones of NGC 5728. II. Kinematics
Authors: Durré Mark , Mould Jeremy
Published: January 2019

We explore the gas morphology and excitation mechanisms of the ionization cones of the type II Seyfert galaxy NGC 5728. Kinematics derived from near-infrared and optical data from the SINFONI and MUSE Integral Field Units on the VLT reveal active galactic nucleus (AGN)-driven outflows powered by a supermassive black hole (SMBH) of mass 3.4 × 107
M
⊙, bolometric luminosity of 1.46 × 1044 erg s−1, Eddington ratio of 3.3 × 10−2, and an accretion rate of 2.7 × 10−2
M
⊙ yr−1. The symmetric bicone outflows show rapid acceleration to ±250 km s−1 at ∼250 pc, decelerating to ∼130 km s−1 at 500 pc from the AGN, with an estimated mass outflow rate of 38 M
⊙ yr−1; the mass ratio of outflows to accretion is 1415. The kinetic power is ∼1.5 × 1042 erg s−1, 1% of the bolometric luminosity. Over the AGN active lifetime of ∼107 yr, 1.6 × 108 M
⊙ of gas can become gravitationally unbound from the galaxy, a large proportion of the gas mass available for star formation in the nuclear region. The bicone internal opening angle (50.°2) and the inclination to the line of sight (47.°6) were determined from [Fe ii] line profiles; the outflow axis is nearly parallel to the plane of the galaxy. This geometry supports the unified model of AGNs, as these angles preclude seeing the accretion disk, which is obscured by the dusty torus.
Probing Cosmic Origins with CO and [C ii] Emission Lines
Authors: Moradinezhad Dizgah Azadeh , Keating Garrett K. , Fialkov Anastasia
Published: January 2019

Primordial non-Gaussianity (PNG) is an invaluable window into the physical processes that gave rise to cosmological structure. The presence of local shape PNG imprints a distinct scale-dependent correction to the bias of dark matter tracers on large scales, which can be effectively probed via the technique of intensity mapping. Considering an upcoming generation of experiments, we demonstrate that intensity mapping of CO and [C ii] emission can improve upon the current best constraints from the Planck satellite. We show that measurement of the CO intensity power spectrum by a hypothetical next stage of the ground-based COMAP experiment can achieve

and that the proposed CMB satellite mission PIXIE can achieve

via measurement of the [C ii] intensity power spectrum.
A Possible Relic Star Cluster in the Sextans Dwarf Galaxy*
Authors: Kim Hak-Sub , Han Sang-Il , Joo Seok-Joo , Jeong Hyunjin , Yoon Suk-Jin
Published: January 2019

We report a possible discovery of a relic star cluster in the Sextans dwarf spheroidal galaxy. Using the hk index (≡(Ca − b)−(b − y)) as a photometric metallicity indicator, we discriminate the metal-poor and metal-rich stars in the galaxy and find unexpected number density excess of metal-poor stars located 7.′7 (∼190 pc in projected distance) away from the known galactic center. The V − I color−magnitude diagram (CMD) for stars around the density excess reveals that both the main sequence and the giant branch are considerably narrower and redder than the bulk of field stars in Sextans. Our stellar population models show (a) that the narrow CMD is best reproduced by a simple stellar population with an age of ∼13 Gyr and [Fe/H] of ∼−2.3 dex, and (b) that the redder V − I color of the hk-weak population is explained only if it is ∼2 Gyr older than the field stars. The results lead us to conclude that the off-centered density peak is likely associated with an old, metal-poor globular cluster. The larger spatial extent (>80 pc in radius) and the smaller number of stars (∼1000) than typical globular clusters point to a star cluster that is in the process of dissolution. The finding serves as the first detection of a surviving star cluster in Sextans, supporting previous suggestions of the presence of star cluster remnants in the galaxy. If confirmed, the survival of a relic star cluster until now implies a cored dark matter halo profile for this dwarf galaxy.
A new species and range extensions for three other species of pebblesnails (Lithoglyphidae, Fluminicola) from the upper Klamath basin, California–Oregon
Authors: Liu Hsiu-Ping , Hershler Robert
Published: January 2019

This is the fifth in a recent series of papers on the poorly known western North American pebblesnail genus Fluminicola (Caenogastropoda, Lithoglyphidae). Herein we clarify the taxonomic status of the currently undescribed pebblesnail fauna in the upper Klamath River drainage (UKL) based on morphologic evidence, and mitochondrial DNA sequence data from 58 UKL collection localities. We describe one new species (F.klamathensis) from eight UKL localities which is differentiated by mtDNA sequences and unique penial morphology, and document range extensions to the UKL for three species from closely proximal drainages (F.fresti, F.modoci, F.multifarius). Fluminicolafresti was found at a single locality along the western edge of upper Klamath Lake. Fluminicolamodoci and F.multifarius are widely distributed in the UKL; both species exhibit marked morphologic variation yet are relatively little differentiated genetically in this basin.
Marqueurs de reformulation : exploration outillée et contrastive dans deux corpus narratifs
Authors: Magri Véronique
Published: January 2019

Cet article a pour enjeu d’observer le processus de la reformulation à l’aide d’une recherche outillée quantitative qui explore un grand corpus littéraire extrait de Frantext et constitué de deux ensembles génériques. Cette observation pourra servir à compléter l’analyse linguistique de la reformulation par des exemples attestés et des commentaires circonstanciés. Les marqueurs de la reformulation sont variés et choisis en fonction de leur représentativité : il s’agit de marqueurs de reformulation paraphrastique formés sur dire ( autrement dit , c’est-à-dire , ce que veut dire ), d’un marqueur prototypique de la reformulation corrective (ou plutôt) , et de deux marqueurs de l’approximation ( une espèce de , une sorte de ), qui entrent aussi dans le processus de construction du sens et servent la désignation des objets du monde.
Introducteurs de cadres et connecteurs de reformulation : étude contrastive sur corpus
Authors: Rossari Corinne , Ricci Claudia , Wandel Dennis
Published: January 2019

Le propos de cet article est de cerner les propriétés des locutions cadratives à nom abstrait qui ont un fonctionnement de connecteur reformulatif en français, dans une démarche qui associe étroitement une analyse qualitative à une analyse quantitative. Dans un premier temps, nous définirons les propriétés qui caractérisent le fonctionnement en tant que reformulatif des cadres à nom abstrait en les comparant notamment aux autres connecteurs de reformulation, puis nous établirons des analyses de collocations pour identifier la façon dont l’ensemble de ces formes se comportent dans un pattern discursif donné, dans le but de comprendre dans quelle mesure ce comportement recoupe les particularités mises en relief dans l’analyse qualitative. Ces recherches seront menées également dans deux autres langues : l’allemand et l’italien.
Les jets textuels de révision : un point de vue dynamique sur la « reformulation »
Authors: Cislaru Georgeta , Olive Thierry
Published: January 2019

Nous nous intéressons, dans cet article, à la reformulation paraphrastique à l’écrit. Nous abordons la reformulation via les enregistrements en temps réel de l’écriture qui donnent accès à des reformulations réalisées au fil de la rédaction et qui ne laissent aucune trace sur les textes finalisés. Nous distinguons les reformulations remontant dans le texte pour se substituer ou s’ajouter à tout ou partie d’un segment de texte produit antérieurement et celles réalisées dans l’immédiateté du processus de rédaction. On constate (i) que le travail d’ajustement textuel impliquant ces reformulations est contraint par des schémas formels préconstruits ; (ii) que la compétence pragmatique des scripteurs est indissociable des autres compétences linguistiques et (iii) qu’évaluer l’équivalence entre les séquences reformulées s’inscrit dans le projet global de textualisation, au niveau de macro-séquences d’enchaînement textuel.
Implication textuelle : problèmes et méthodes pour le TAL
Authors: Grau Brigitte , Gleize Martin
Published: January 2019

Cet article se situe dans le contexte de « machine reading » et porte sur la détection automatique d’inférences textuelles posée comme une reformulation d’énoncés. De manière à pouvoir évaluer et étudier les capacités des machines pour reconnaître automatiquement ces inférences, nous traitons un corpus écrit de questions-réponses. Nous élaborons d’abord une taxonomie des inférences qui repose sur les procédés linguistiques en jeu. Nous proposons ensuite une méthode automatique pour les modéliser.
L’invasion par la réalité (ou par la négociation) : angoisse d’extinction et éthique psychanalytique
Authors: Nociforo Nicola
Published: January 2019

L’expression « angoisse d’extinction » décrit un sentiment généralisé et particulièrement réel de perte de tout avenir. En tant qu’émotion groupale caractérisée par la terreur d’une extinction de l’espèce humaine, de la famille ou de groupes professionnels et culturels, elle enserre l’individu dans un sentiment de désespoir et d’impuissance par l’entremise des groupes internes présents dans son esprit. Cet article vise à montrer qu’une angoisse d’extinction a également infecté les psychanalystes et les institutions psychanalytiques, affaiblissant ainsi l’éthique psychanalytique. Le terme « éthique » ne doit pas ici être confondu avec la morale ; il est compris comme un sentiment de bonheur inhérent à la capacité d’être responsable de soi-même et de son identité professionnelle. La contagion de l’angoisse d’extinction a, en fait, accentué la crise des psychanalystes et leur foi en la psychanalyse. L’auteur rapporte une expérience clinique particulièrement tourmentée pour montrer que seule une relation forte à la psychanalyse et à sa capacité d’interpréter les manifestations de l’inconscient permet de reconnaître les effets de ce qu’il définit comme un véritable envahissement par la réalité, et de restaurer le pouvoir de la pensée de nouer une relation profonde, transformationnelle et féconde entre les réalités interne et externe.
Les mouvements contre-transférentiels du superviseur et leurs interférences dans l’évaluation de la capacité des candidats à valider leur cursus : des facteurs toujours présents mais systématiquement sous-estimés
Authors: Ehrlich Lena Theodorou , Mann Kulish Nancy , Fitzpatrick Hanly Margaret Ann , Robinson Marianne , Rothstein Arden
Published: January 2019

À partir de matériel détaillé et approfondi extrait de séances de supervision qui ont eu lieu dans le monde entier (étudié dans le cadre des groupes « Évaluation de la Fin de la Formation » [EFF]), cet article montre que les superviseurs sont sujets à des mouvements contre-transférentiels intenses, multiformes et variés, et parfois même continus, qui empiètent sur leur capacité d’évaluer les progrès des candidats. Les sources multiples, externes et internes, de ces interférences sont examinées ici. Les auteurs avancent l’idée que les mouvements contre-transférentiels des superviseurs et leurs manifestations via des mises en acte en parallèle demeurent sous-estimés et inutilisés, de même que leur impact et les informations qu’ils contiennent. Les auteurs soutiennent que la reconnaissance, l’endiguement et l’utilisation de ces phénomènes parallèles et des mouvements contre-transférentiels en supervision sont essentiels pour pouvoir évaluer les progrès des candidats et leur capacité de valider leur cursus. Ils décrivent également les signaux les plus courants de ce type d’enchevêtrement qui altère la fonction évaluative du superviseur et proposent trois solutions « tierces » pour aider les superviseurs à utiliser leur contre-transfert à bon escient : auto-supervision, consultation et mesures de correction institutionnelles.
Advanced Organizers: A Framework to Implement Learning Readiness in Support of Broad-Scale Change
Authors: Carkhuff Marjorie H , Crago Michael G
Published: January 2019

ABSTRACT

Staff development educators are challenged to bring value to the adoption of new organizational management tools to improve the health care of patients. One strategy used to pursue health care excellence is the adoption of the ISO 9000 standards. However, implementation of this quality management system requires acceptance at all levels of the healthcare organization. This article explores the concept of learning readiness and uses an example of a training design strategy called an "Advanced Organizer." The authors describe its use as a development readiness strategy, outline the methodology for development and implementation, and provide steps for successful implementation. The implications for staff development educators are reviewed for the concept of learning readiness and broad-scale performance improvement initiatives.