bluuebunny/crossref_metadata_2025_split huggingface dataset:
Implementation of a VLC‐based indoor localization system
Authors: Torres‐Zapata E. , Luna‐Rivera J. M. , Perez‐Jimenez R. , Guerra V. , Rabadan J. , Rufo J. , Gutierrez C. A. 
Published: August 2018

AbstractNowadays, with the incursion of solid state lighting technology in our daily life, visible light communication (VLC) systems are becoming more important. This fact has generated a lot of attention on VLC to provide solutions on multiple applications where this technology can be exploited. At the same time, the growing of automation processes has created the necessity of knowing the localization of different objects and devices. Indoor localization based on radio frequency signals is one of the most used techniques (Wi‐Fi, Bluetooth, UWB, RFID, etc); however, VLC is a new and interesting method, which is gaining enormous research attention. Moreover, there are environments where the use of RF technologies is restricted or even prohibited. In such cases, VLC technology becomes an interesting alternative to solve this problem. In this paper, we design and implement a novel VLC‐based indoor localization system that combines the application of a VLC scheme for downlink and an ultrasonic communication for the uplink. Practical localization experiments are carried out in an actual office room environment, and results show a localization accuracy of 4 cm on average for direct links and 10 cm for indirect links.
Resilient architecture for network and control co‐design under wireless channel uncertainty in cyber‐physical systems
Authors: Kim Dohwan , Won Yuchang , Eun Yongsoon , Park Kyung‐Joon 
Published: August 2018

AbstractIn this paper, we propose a resilient architecture for network and control co‐design, Wireless‐Simplex (W‐Simplex), which can ensure control performance by adaptively tuning the network and control parameters against wireless channel uncertainty in cyber‐physical systems. To the best of our knowledge, there has been no research into resilient network and control co‐design in response to the unreliable wireless channel. Our key observation is that rate adaptation may cause significant degradation in control performance or even system instability. This performance degradation is contrary to the intuition that rate adaptation provides a reliable link under wireless channel uncertainty. We explain the cause of this phenomenon and resolve the situation by proposing a resilient co‐design algorithm in an optimization framework. Our simulation study with ns‐2 shows the effectiveness of the proposed scheme to provide resilience of cyber‐physical systems against wireless channel uncertainty.
A hybrid precoding‐ and filtering‐based uplink MC‐LNOMA scheme for 5G cellular networks with reduced PAPR
Authors: Baig Imran , Farooq Umer , Ahmed Ejaz , Imran Muhammad , Shoaib Muhammad 
Published: August 2018

AbstractUplink multicarrier localized nonorthogonal multiple access (MC‐LNOMA) is a variant of hybrid nonorthogonal multiple access, where subcarrier mapping is performed in localized mode. MC‐LNOMA is one of the most prominent emerging schemes and likely to be employed in the forthcoming fifth‐generation cellular networks due to its massive connectivity, spectral efficiency, better cell coverage capability, and higher data rate. It may employ orthogonal frequency‐division multiple access due to the technical ripeness. However, schemes based on orthogonal frequency‐division multiple access all suffer from the high peak‐to‐average power ratio problem. Therefore, in this paper, a new finite impulse response filter–based discrete cosine transform–precoded uplink MC‐LNOMA scheme is presented for peak‐to‐average power ratio reduction. MATLAB simulations demonstrate the performance supremacy of the proposed scheme compared to contemporary schemes such as discrete cosine transform–precoded uplink MC‐LNOMA and nonprecoded uplink MC‐LNOMA.
Financial volatility modeling: The feedback asymmetric conditional autoregressive range model
Authors: Xie Haibin 
Published: August 2018

AbstractAn implied assumption in the asymmetric conditional autoregressive range (ACARR) model is that upward range is independent of downward range. This paper scrutinizes this assumption on a broad variety of stock indices. Instead of independence, we find significant cross‐interdependence between the upward range and the downward range. Regression test shows that the cross‐interdependence cannot be explained by leverage effect. To include the cross‐interdependence, a feedback asymmetric conditional autoregressive range (FACARR) model is proposed. Empirical studies are performed on a variety of stock indices, and the results show that the FACARR model outperforms the ACARR model with high significance for both in‐sample and out‐of‐sample forecasting.
An almost ideal demand system (AIDS) analysis of Korean travelers' summer holiday travel expenditure patterns
Authors: Ahn Young‐Joo , Baek Unji , Lee Byeong Cheol , Lee Seul Ki 
Published: August 2018

AbstractThis study analyzes expenditure categories of travelers on their summer holiday trips, jointly with the effects of travel duration, number of travel companions, and travel type. Results of the almost ideal demand system (AIDS) estimation on data from 1,113 Korean respondents reveal strong interrelationships among expenditure, own‐price, and cross‐price elasticities in the total travel‐related consumption behaviors. This study of a system‐of‐equations approach serves as a launch pad for ongoing work by jointly modeling effects of trip characteristics and prices through a comprehensive, nonlinear AIDS approach and reflecting destination price changes for Koreans who traveled during their summer holidays.
Imaging Markers of Progression in Parkinson's Disease
Authors: Strafella Antonio P. , Bohnen Nico I. , Pavese Nicola , Vaillancourt David E. , van Eimeren Thilo , Politis Marios , Tessitore Alessandro , Ghadery Christine , Lewis Simon ,   on behalf of IPMDS‐Neuroimaging Study Group
Published: August 2018

ABSTRACTBackgroundParkinson's disease (PD) is the second‐most common neurodegenerative disorder after Alzheimer's disease; however, to date, there is no approved treatment that stops or slows down disease progression. Over the past decades, neuroimaging studies, including molecular imaging and MRI are trying to provide insights into the mechanisms underlying PD.MethodsThis work utilized a literature review.ResultsIt is now becoming clear that these imaging modalities can provide biomarkers that can objectively detect brain changes related to PD and monitor these changes as the disease progresses, and these biomarkers are required to establish a breakthrough in neuroprotective or disease‐modifying therapeutics.ConclusionsHere, we provide a review of recent observations deriving from PET, single‐positron emission tomography, and MRI studies exploring PD and other parkinsonian disorders.
Cervical Dystonia Following Injury to the Cerebellar Pontine Angle: An Instructive Case
Authors: Karnik Vikram , Del Gamba Claudia , Jesuthasan Aaron , Latorre Anna 
Published: August 2018

A 38‐year‐old woman presented with cervical dystonia in the context of a recent surgery to remove a vestibular schwannoma. She initially presented to neurology with pain in the right arm, and MRI of the brain showed an incidental right‐sided vestibular schwannoma (Video 1, Segment 1). An elective gamma‐knife procedure was performed, which failed. Hydrocephalus requiring ventriculoperitoneal shunt insertion developed, and 3 years following the initial procedure the lesion was surgically excised. Surgery was further complicated by right middle cerebellar peduncle injury, extending to the cerebellopontine angle and marginally to the right pontine tegmentum, with subsequent mass effect on cerebellum displayed on follow‐up MRI (Video 1, Segment 2).Six months later, the patient experienced forced head deviation to the right, with difficulty moving from this position. Examination revealed clear right‐sided torticollis, with hypertrophy of the left sternocleidomastoid muscle. Cervical dystonia worsened with action and nearly resolved with the patient lying down. A clear geste antagoniste, where symptoms improved with the patient touching the side of her head, was present (Video 1, Segment 3). Findings consistent with injury to the cerebellar pathways were additionally exhibited. She demonstrated clear dysarthria, bilateral dysmetria, dysdiadochokinesia (worse on the right), and prominent gait ataxia (Video 1, Segment 4). Although a possible role of the schwannoma itself in the cervical dystonia pathogenesis cannot be entirely ruled out, the timing of signs, occurring soon after the postsurgical injury, suggest a prominent involvement of structures lying within the cerebellar pontine angle.
An evaluation of diagnostic agreement rates between advanced practice physiotherapists and paediatric orthopaedic consultants for children with musculoskeletal complaints
Authors: Ó Mír Marie , O'Sullivan Cliona , Lennon Olive , Blake Catherine 
Published: August 2018

AbstractPurposeThe purpose of the present study was to establish diagnostic agreement rates between orthopaedic consultants and advanced practice physiotherapists (APPs) for paediatric orthopaedic patients, examine the appropriateness of referrals by APPs to consultants and report on the surgical conversion rate (SCR).MethodsA retrospective review of all patients referred from an APP clinic to orthopaedic consultants was conducted for 2013, with a 3‐year longitudinal follow‐up through to the end of 2016. Study participants were two APPs and four orthopaedic consultants at a single site. Descriptive statistics report the proportion of appropriate onward referrals and SCRs. Raw proportion agreement and kappa coefficients were used to evaluate diagnostic agreement rates.ResultsThe mean raw agreement was 82% (95% confidence interval = 73 to 87), with 12 of the 15 individual codes demonstrating agreement rates ≥90% (range 57–100). Good to excellent agreement was demonstrated in almost all categories based on the kappa coefficient. Eighty‐seven per cent of referrals from APPs were deemed to be appropriate by the orthopaedic consultants. The SCR was 23%.ConclusionsThis was the first study to evaluate diagnostic agreement rates between APPs and orthopaedic consultants, the appropriateness of onward referral by APPs and the SCR for paediatric musculoskeletal patients referred from an APP clinic. Good to excellent diagnostic agreement was observed for routine elective paediatric orthopaedic patients, in tandem with agreement levels reported in the adult literature. The study demonstrates that APPs are clinically effective in the diagnosis and onward referral of paediatric orthopaedic patients in a triage setting.
Continued Embryonic Development, Survival, and Growth of Walleye Larvae Following Exposure to Dewatering and Storage in Melting-Ice Temperatures
Authors: Dabrowski Konrad , Wojno Michal , Miller MacKenzie , Kwasek Karolina , Grayson John 
Published: August 2018

Abstract
The tolerance of eyed-stage embryos of Walleye Sander vitreus to cooling at melting-ice temperatures and their subsequent hatching and rearing to advanced juveniles were examined. Embryos (71% viable; 8 d after fertilization) were refrigerated in an insulated transportation Styrofoam box between wet cheesecloth layers and melting ice (1.4°C) for 25, 48, 72, and 120 h. Embryos were then acclimated to 14°C aquaria for hatching and rearing (20°C). The hatching of embryos and their ability to continue development (swim bladder inflation), food acceptance (live nauplii of brine shrimp Artemia spp.), and growth were monitored for 14 d. The duration of exposure to cold storage stress resulted in no significant differences in mean ± SD survival (46.8 ± 8.0, 38.7 ± 8.6, 41.0 ± 4.9, and 36.9 ± 12.5% for 25-, 48-, 72-, 120-h treatments, respectively) at the end of the rearing and feeding period. However, the proportion of fish with inflated swim bladders was the highest in the 120-h cold-delayed fish (mean ± SD = 61 ± 18, 54 ± 8, 64 ± 3.8, and 90.5 ± 8%, respectively). The mean weight of fish was not significantly influenced by cold storage treatments but was significantly influenced by swim bladder status (9.2–11.8 mg, 7.0–9.8 mg, and 5.7–9.5 mg for fully inflated, partially inflated, and uninflated groups, respectively). This experiment provides significant new data to fish culturists regarding the storage of Walleye embryos prior to hatching and the possibility of convenient transportation or delayed stocking of larvae into prepared nursing ponds or indoor rearing tanks for intensive culture.
Inactive individuals with chronic neck pain have changes in range of motion and functional performance of the shoulder
Authors: da Silva Rafaela Maria , Bezerra Mariana Alves , Santos‐de‐Araújo Aldair Darlan , de Paula Gomes Cid André Fidelis , da Silva Souza Cesário , de Souza Matias Priscila Helena Vanin Alves , Dibai‐Filho Almir Vieira 
Published: August 2018

AbstractObjectiveTo correlate the range of movement and functional performance of the shoulder with pain measures in inactive individuals with and without neck pain. In addition, comparisons were made between the groups.MethodsThe sample comprised two groups of inactive adults, aged 18–45 years: chronic neck pain (n = 30) and healthy subjects (n = 30). All participants had no clinical dysfunction in the shoulder joint. Aspects related to neck pain were evaluated with the Numerical Rating Scale, Neck Disability Index, and the Catastrophic Thoughts about Pain Scale. Range of motion and shoulder functionality was evaluated by means of goniometry and the Closed Kinetic Chain Upper Extremity Stability (CKCUES) test, respectively.ResultsIndividuals with neck pain presented reduction in CKCUES test (absolute score, mean difference [MD] = −1.50, 95% confidence interval [CI] [−2.87, −0.12]) and in abduction (MD = −7.36°, 95% CI [−13.84, −0.89]) and lateral rotation (MD = −8.61°, CI [−15.94, −1.28]) range of motion. Moreover, weak, significant, and negative association (p < 0.05, r = −0.262 to −0.384) was observed between the CKCUES test and pain intensity at rest and during active cervical movements, as well as catastrophizing. A weak, significant, and negative association (p < 0.05, r = −0.256 to −0.389) was also observed between the lateral rotation range of motion and catastrophizing, as well as pain intensity both at rest and during active movements.ConclusionThe greater the neck pain intensity and catastrophizing, the lower the functional performance and lateral rotation range of motion of the shoulder.
Advanced solutions with hot‐rolled sections for economical and durable bridges
Authors: Rademacher Dennis , Ochojski Wojciech , Lorenc Wojciech , Kożuch Maciej 
Published: August 2018

AbstractGrowing problems in terms of damage to bridges correlated with – in some cases huge – long‐term impacts on road traffic have shown how essential it is to ensure the durability of the infrastructure and thus the mobility of people as well as the exchange of goods. Corrosion damage can be sustainably avoided in future by employing alternative protection systems for steel and composite bridges. Both hot‐dip galvanizing with a coating thickness of at least 200 µm and weathering steel offer crucial advantages over traditional coating systems when considering the whole life cycle of a bridge: They require no maintenance, and so traffic disruption can be avoided. When using these systems in combination with hot‐rolled sections, there are further significant advantages as they render composite bridges more economical and durable, particularly when it comes to short and medium spans. Standard higher strengths with steel grade S460 allow for more economical cross‐sections, with weight‐ and cost‐savings of often 20–30 % compared with welded built‐up sections in grade S355. Sophisticated designs employing rolled sections can achieve not only small and medium spans, but also longer ones, e.g. arch bridges with spans > 100 m. This article describes new trends in Europe using hot‐rolled sections in steel and composite bridges.
Are longer advertising slogans more dangerous? The influence of the length of ad slogans on drivers’ attention and motor behavior
Authors: Harasimczuk Justyna , Maliszewski Norbert E. , Olejniczak-Serowiec Anna , Tarnowski Adam 
Published: August 2018

AbstractThe purpose of this project was to verify whether slogans displayed on roadside advertisements created a distraction for drivers. In order to explain the mechanisms underlying this phenomenon, Study 1 examined the impact of slogan length on attentional processing efficiency. Study 2 investigated the relationship between the length of the slogan and the motor behavior of respondents driving a car simulator. We assumed that slogan length would decrease the drivers’ task performance in both studies. Study 1 was conducted on a group of 70 participants, who completed a modified version of the Attention Network Test (ANT; Fan et al. Journal of Cognitive Neuroscience, 14(3), 340–347, 2002). The task consisted of visual ads intended to distract respondents from the primary task. Reaction times were significantly longer when ads had longer slogans compared to shorter slogans. Study 2, involving a car simulator, was conducted on a group of 53 drivers performing a task of driving in a convoy. Participants were shown billboards with ads at the roadside in random order (two pairs of corresponding ads with short and long text on it). Participants’ driving performance decreased when longer slogans were presented in comparison to the short-slogan condition. In conclusion, we interpret the results of Study 1 to indicate that longer slogan leads to a greater load of attentional processing. This subsequently leads to a reduction of the processing efficiency within attentional systems and further increases the amount of time to resist the irrelevant stimulus. A consequence of this, as shown in Study 2 using a car simulator, is a decrease in cognitive resources necessary for safe driving and therefore worse performance on a driving task.
NOTE ON THE NUMBER OF DIVISORS OF REDUCIBLE QUADRATIC POLYNOMIALS
Authors: DUDEK ADRIAN W. , PAŃKOWSKI ŁUKASZ , SCHARASCHKIN VICTOR 
Published: August 2018

Lapkova [‘On the average number of divisors of reducible quadratic polynomials’,J. Number Theory 180(2017), 710–729] uses a Tauberian theorem to derive an asymptotic formula for the divisor sum$\sum _{n\leq x}d(n(n+v))$where$v$is a fixed integer and$d(n)$denotes the number of divisors of $n$. We reprove this result with additional terms in the asymptotic formula, by investigating the relationship between this divisor sum and the well-known sum$\sum _{n\leq x}d(n)d(n+v)$.
ENTIRE SOLUTIONS OF A CURVATURE FLOW IN AN UNDULATING CYLINDER
Authors: YUAN LIXIA , LOU BENDONG 
Published: August 2018

We consider a curvature flow $V=\unicode[STIX]{x1D705}+A$ in a two-dimensional undulating cylinder $\unicode[STIX]{x1D6FA}$ described by $\unicode[STIX]{x1D6FA}:=\{(x,y)\in \mathbb{R}^{2}\mid -g_{1}(y)<x<g_{2}(y),y\in \mathbb{R}\}$, where $V$ is the normal velocity of a moving curve contacting the boundaries of $\unicode[STIX]{x1D6FA}$ perpendicularly, $\unicode[STIX]{x1D705}$ is its curvature, $A>0$ is a constant and $g_{1}(y),g_{2}(y)$ are positive smooth functions. If $g_{1}$ and $g_{2}$ are periodic functions and there are no stationary curves, Matano et al. [‘Periodic traveling waves in a two-dimensional cylinder with saw-toothed boundary and their homogenization limit’, Netw. Heterog. Media1 (2006), 537–568] proved the existence of a periodic travelling wave. We consider the case where $g_{1},g_{2}$ are general nonperiodic positive functions and the problem has some stationary curves. For each stationary curve $\unicode[STIX]{x1D6E4}$ unstable from above/below, we construct an entire solution growing out of it, that is, a solution curve $\unicode[STIX]{x1D6E4}_{t}$ which increases/decreases monotonically, converging to $\unicode[STIX]{x1D6E4}$ as $t\rightarrow -\infty$ and converging to another stationary curve or to $+\infty /-\infty$ as $t\rightarrow \infty$.
Defense Cooperation Agreements and the Emergence of a Global Security Network
Authors: Kinne Brandon J 
Published: August 2018

AbstractBilateral defense cooperation agreements, or DCAs, are now the most common form of institutionalized defense cooperation. These formal agreements establish broad defense-oriented legal frameworks between signatories, facilitating cooperation in such fundamental areas as defense policy coordination, research and development, joint military exercises, education and training, arms procurement, and exchange of classified information. Although nearly a thousand DCAs are currently in force, with potentially wide-ranging impacts on national and international security outcomes, DCAs have been largely ignored by scholars. Why have DCAs proliferated? I develop a theory that integrates cooperation theory with insights from social network analysis. Shifts in the global security environment since the 1980s have fueleddemandfor DCAs. States use DCAs to modernize their militaries, respond to shared security threats, and establish security umbrellas with like-minded states. Yet, demand alone cannot explain DCA proliferation; to cooperate, governments must also overcome dilemmas of mistrust and distributional conflicts. I show that network influences increase thesupplyof DCAs by providing governments with information about the trustworthiness of partners and the risk of asymmetric distributions of gains. DCAs become easier to sign as more states sign them. I identify two specific network influences—preferential attachmentandtriadic closure—and show that these influences are largely responsible for the post-Cold War diffusion of DCAs. Novel empirical strategies further indicate that these influences derive from the proposed informational mechanism. States use the DCA ties of others to glean information about prospective defense partners, thus endogenously fueling further growth of the global DCA network.
On the Scales of Dynamic Topography in Whole‐Mantle Convection Models
Authors: Arnould M. , Coltice N. , Flament N. , Seigneur V. , Müller R. D. 
Published: August 2018

AbstractMantle convection shapes Earth's surface by generating dynamic topography. Observational constraints and regional convection models suggest that surface topography could be sensitive to mantle flow for wavelengths as short as 1,000 and 250 km, respectively. At these spatial scales, surface processes including sedimentation and relative sea‐level change occur on million‐year timescales. However, time‐dependent global mantle flow models do not predict small‐scale dynamic topography yet. Here we present 2‐D spherical annulus numerical models of mantle convection with large radial and lateral viscosity contrasts. We first identify the range of Rayleigh number, internal heat production rate and yield stress for which models generate plate‐like behavior, surface heat flow, surface velocities, and topography distribution comparable to Earth's. These models produce both whole‐mantle convection and small‐scale convection in the upper mantle, which results in small‐scale (<500 km) to large‐scale (>104 km) dynamic topography, with a spectral power for intermediate scales (500 to 104 km) comparable to estimates of present‐day residual topography. Timescales of convection and the associated dynamic topography vary from five to several hundreds of millions of years. For a Rayleigh number of 107, we investigate how lithosphere yield stress variations (10–50 MPa) and the presence of deep thermochemical heterogeneities favor small‐scale (200–500 km) and intermediate‐scale (500–104 km) dynamic topography by controlling the formation of small‐scale convection and the number and distribution of subduction zones, respectively. The interplay between mantle convection and lithosphere dynamics generates a complex spatial and temporal pattern of dynamic topography consistent with constraints for Earth.