Miracle-dz/UniFAR-FTUs huggingface dataset:
An extended role based access control model for the Internet of Things

The Internet of Things is a rapidly growing concept in recent years. It refers to the idea that every physical thing in this world can be also connected to the Internet as well as computers. As the development of embedded systems, computing, and networking, the growing number of physical objects in our daily life become addressable through a network, however, more and more resources along with privacy and value of information they hold are exposed over the network, this brings a serious threat to the existing security system. In this paper, we make the physical objects easily seamless integrated and manageable through the use of services. In addition, we propose an extended role based access control model using the context information, which can effectively enhance the security for web services applications and produce more perfect mechanism of access control for the Internet of Things.
Geometric ergodicity for dissipative particle dynamics

Dissipative particle dynamics is a model of multi-phase fluid flows described by a system of stochastic differential equations. We consider the problem of N particles evolving on the one-dimensional periodic domain of length L and, if the density of particles is large, prove geometric convergence to a unique invariant measure. The proof uses minorization and drift arguments, but allows elements of the drift and diffusion matrix to have compact support, in which case hypoellipticity arguments are not directly available
Reliability and Validity of Isometric Knee Extensor Strength Test With Hand-Held Dynamometer Depending on Its Fixation: A Pilot Study

Objective To determine the reliability and validity of hand-held dynamometer (HHD) depending on its fixation in measuring isometric knee extensor strength by comparing the results with an isokinetic dynamometer. Methods Twenty-seven healthy female volunteers participated in this study. The subjects were tested in seated and supine position using three measurement methods: isometric knee extension by isokinetic dynamometer, non-fixed HHD, and fixed HHD. During the measurement, the knee joints of subjects were fixed at a 35° angle from the extended position. The fixed HHD measurement was conducted with the HHD fixed to distal tibia with a Velcro strap; non-fixed HHD was performed with a hand-held method without Velcro fixation. All the measurements were repeated three times and among them, the maximum values of peak torque were used for the analysis. Results The data from the fixed HHD method showed higher validity than the non-fixed method compared with the results of the isokinetic dynamometer. Pearson correlation coefficients (r) between fixed HHD and isokinetic dynamometer method were statistically significant (supine-right: r=0.806, p<0.05; seating-right: r=0.473, p<0.05; supine-left: r=0.524, p<0.05), whereas Pearson correlation coefficients between non-fixed dynamometer and isokinetic dynamometer methods were not statistically significant, except for the result of the supine position of the left leg (r=0.384, p<0.05). Both fixed and non-fixed HHD methods showed excellent inter-rater reliability. However, the fixed HHD method showed a higher reliability than the non-fixed HHD method by considering the intraclass correlation coefficient (fixed HHD, 0.952-0.984; non-fixed HHD, 0.940-0.963). Conclusion Fixation of HHD during measurement in the supine position increases the reliability and validity in measuring the quadriceps strength.
Information-theoretic environment modeling for efficient topological localization

Place recognition is a vital methodology for modeling environments and localizing autonomous mobile robots topologically. It can also be integrated in a hierarchical framework where it guides a fast and more precise metric position estimation. Especially for those hierarchical frameworks, it is crucial that the place recognition modules be highly accurate. In this paper, an information-theoretic approach that focuses on the efficiency of place recognition for topological environment modeling and localization is presented. The approach relies on a minimal discriminative feature set obtained from an entropy-based qualitative evaluation and a codebook compression. The generated environment feature map achieves a significant combination of high localization accuracy, speed and less memory storage.
Development of a patient safety climate scale in Japan.

BACKGROUND Although patient safety climate is an important factor in preventing adverse events in health care organizations, there is no usable Japanese scale. OBJECTIVE To develop a Japanese scale to measure patient safety climate and to evaluate its psychometric properties. METHODS Cross-sectional questionnaire survey was conducted with respect to 9 non-academic general hospitals in Japan. A total of 1878 health care professionals (nurses, therapists, technicians, pharmacists and physicians) were included in a study. RESULTS The eight dimensions measuring worker attitudes (free communication flow, continuous improvement, reporting/rules compliance and patient/family involvement) and organizational factors (supervisors' safety leadership, allied professionals' safety leadership, patient safety committee leadership and rules/equipment availability) were extracted by factor analysis. The internal consistency (measured by Cronbach's alpha) and repeatability (measured by intraclass correlation) were more than 0.70 for all subscales. In addition, the mean score, the within-group interrater reliability statistic (r(wg)) and the correlation coefficients of the mean score were confirmed at the workplace level. CONCLUSIONS The scale showed acceptable dimensionality, reliability and validity. It also provided workplace team-evaluation and a tool for assessing the patient safety climate at the level of the workplace.
Pricing of insurance policies against cloud storage price rises

When a company migrates to cloud storage, the way back is neither fast nor cheap. The company is then locked up in the storage contract and exposed to upward market prices, which reduce the company's profit and may even bring it below zero. We propose a protection means based on an insurance contract, by which the cloud purchaser is indemnified when the current storage price exceeds a pre-defined threshold. By applying the financial options theory, we provide a formula for the insurance price (the premium). By using historical data on market prices for disks, we apply the formula in realistic scenarios. We show that the premium grows nearly quadratically with the duration of the coverage period as long as this is below one year, but grows more slowly, though faster than linearly, over longer coverage periods.
Factors influencing behavioral intention to use computers among teachers

Since the first computer system was implemented in Malaysia in 1996, computers were deployed to schools in Malaysia. Teachers are expected to use the computers in classrooms to accomplish the country's vision to reach the level of a world class quality education system by the end of year 2020. Unfortunately majority of them are not using it as teaching tool in the classrooms. Factors influencing computer usage using The Unified Theory of Acceptance and Use of Technology model (UTAUT) have already been carried by a large number of researchers in Western countries. As many studies had not been conducted based on the Eastern cultural context, an in-depth study on the UTAUT model was carried out to test its applicability in Malaysia. The researchers also make an effort to identify and predict all those factors that show influence on teachers' behavioral intention (BI) in using computers. 40 teachers in Perak were selected to determine whether the 4 UTAUT main constructs; Performance Expectancy (PE), Effort Expectancy (EE), Social Influence (SI) and Facilitating Conditions (FC) have an impact on the teachers' BI to utilize computers in classrooms environment. This study also introduces an extra construct in the modified UTAUT conceptual model, `Perceived Needs'. Confirmatory factor analysis (CFA) has been engaged in order to determine the modified UTAUT model's reliability and validity. Findings from this study depicted that Perceived Needs is also a crucial factor influencing teachers' behavioral intention of utilizing the computer.
Exact and approximate Fourier rebinning of PET data from time-of-flight to non time-of-flight

The image reconstruction problem for fully 3D TOF PET is challenging because of the large data sizes involved. One approach to this problem is to first rebin the data into one of the following lower dimensional formats: 2D TOF, 3D non TOF or 2D non TOF. Here we present a unified framework based on a generalized projection slice theorem for TOF data that can be used to compute each of these mappings. We use this framework to develop approaches for rebinning into non TOF formats without significant loss of information. We first derive the exact mappings and then describe approximations which address the missing data problem for oblique sinograms. We evaluate the performance of approximate rebinning using Monte Carlo simulations. Our results show that rebinning into non TOF sinograms retains significant SNR advantages over sinograms collected without TOF information.
Relationships Between the Appearances and Changes of Estrous Signs and the Estradiol-17β Peak, Luteinizing Hormone Surge and Ovulation During the Periovulatory Period in Lactating Dairy Cows Kept in Tie-stalls

Lactating Holstein-Friesian cows kept in tie-stall barn were used as subjects in this study. Rectal examination, ultrasonography and blood sampling were conducted every other day and then daily after the day on which diameter of the corpus luteum decreased. After the luteal diameter decreased for 2 consecutive days, rectal and ultrasound examinations, blood sampling, and observation of estrous signs were conducted at 6-h intervals. Most of the estrous signs became obvious with the increase in estradiol-17β (E2) and became most remarkable 24 to 30 hours before ovulation, at which point the E2 peak and luteinizing hormone (LH) surge were achieved, and then weakened which progression to ovulation. The correlation between the intensity of four estrous signs (hyperemia and swelling of the intravaginal part of the uterus, opening of the external uterine orifice and viscosity of the cervical mucus) and the plasma E2 concentration was higher than that of three estrous signs (swelling of the vulva, contraction of the uterus, diameter of uterine horn) and the plasma E2 concentration. The relaxation of the intravaginal part of the uterus showed a unique change compared with the other estrous signs, and it became most obvious 6, 12 and 18 h before ovulation; this obviously relaxed period was consistent with the generally accepted theoretical optimal time for artificial insemination (AI), i.e., 6 to 24 h after initiation of estrus. These results suggest that observation of estrous signs by vaginoscopic examination gave useful information for detection of the optimal timing of AI in the periovulatory period in lactating dairy cows kept in a tie-stall barn.
at UWindsor Bias Correction in Small Sample from Big Data

—This paper discusses the bias problem when estimating the population size of big data such as online social networks (OSN) using simple random walk. Unlike the traditional estimation problem where the sample size is not very small relative to the data size, in big data a small sample relative to the data size is already very large and costly to obtain. When small samples are used, there is a bias that is no longer negligible. This paper shows analitically that the relative bias can be approximated by the reciprocal of the number of collisions, thereby a bias correction estimator is introduced. The result is further supported by both simulation studies and the real Twitter network that contains 41.7 million nodes.
Escala de Autorrelato de Trapaça-Admissão: Evidências de Validade Fatorial e Precisão

This study aimed to adapt the Cheating Admission Self Report Scale (CASRS)to the Brazilian context and collect evi-dence on factorial validity and internal consistency. 441 students participated ( M =16 years, 54.6% females), randomly divided in two groups. All responded to CASRS and to demographic questions. The analysis of the main components demonstrated a bifactor structure, whose factors presented Cronbach’s alphas (α) greater than . 80 (G1). This structure was corroborated by means of confirmatory factor analysis (for example, CFI=.87 and RMSEA=.08). The scale was shown to be psychometrically adequate and there was evidence of factorial validity and internal consistency; the scale can be used to measure plagiarism in the academic context. How to cite this article: Gouveia, V. , Moura, H. , Santos, L. , Nascimento, A. , Guedes, I. , & Gouveia, R. (2018). Cheating Admission Self Report Scale: Evidence of Factorial Validity and Precision. Revista Colombiana de Psicologia, 27 (1), 27-40. doi: https://doi.org/10.15446/rcp.v27n1. 64467
Simulation of paraxial beam propagation using plane wave expansion method

The simulation on propagation of microwave beam from one transverse plane to other transverse plane is useful for applications like phase retrieval of microwave beams propagating from one plane to another. The plane wave expansion method is used for paraxial beam propagation of a given field structure. This method decomposes the arbitrary field distribution in to infinite number of plane waves covering the entire range of directions from the propagation axis. The plane wave expansion is an extension of Fourier transform concept where any arbitrary signal is decomposed into infinite number of frequency components with frequency ranging from -infin to +infin. One can easily propagate the arbitrary field distribution form one plane to other by propagating its plane wave components. The idea of microwave beam propagation using plan wave expansion method is explored. This method is validated for the propagation of a Gaussian beam in free space. The simulation results are verified with analytical calculation.
Gas infall and stochastic star formation in galaxies in the local universe

We study the recent star formation histories of local galaxies by analysing the scatter in their colours and spectral properties. We present evidence that the distribution of star forma- tion histories changes qualitatively above a characteristic stellar surface mass density of 3 × 10 8 Mkpc −2 , corresponding to the transition between disc-dominated (late-type) galaxies and bulge-dominated (early-type) systems. When we average over subpopulations of galaxies with densities below this value, we find that subpopulations of all masses and densities form their stars at the same average rate per unit stellar mass. However, the scatter in galaxy colours, stellar absorption-line indices and emission-line strengths is larger for more compact galaxies of a given mass. This suggests that star formation occurs in shorter, higher amplitude events in galaxies with smaller sizes. Above the characteristic density, galaxy growth through star forma- tion shuts down and the scatter in galaxy colours and spectral properties decreases. We propose that in low-density galaxies, star formation events are triggered when cold gas is accreted on to a galaxy. We have used a new high-resolution numerical simulation of structure formation in a 'concordance' Lambda cold dark matter (� CDM) universe to quantify the incidence of these accretion events, and we show that the observational data are well fitted by a model in which the consumption time of accreted gas decreases with the surface density of the galaxy as t cons ∝ μ −1 ∗ . The dark matter haloes that host massive galaxies with high stellar surface mass densities are also expected to grow through accretion, but the observations indicate that in bulge-dominated galaxies, star formation is no longer coupled to the hierarchical build-up of these systems.
Incidence of anthropometric variables on the performance of top Optimist sailors

The aim of this study was to determine the anthropometric profile of top Optimist sailors to examine how anthropometric variables influence their performance, taking the wind conditions into account. The study comprised 180 sailors (158 males and 22 females) aged 11-15 years competing in the Optimist World Sailing Championship held in Las Palmas de Gran Canaria, Spain, from 23 July to 3 August 2003. A descriptive correlational design was used. Assessments were made before and during the championship. The variables studied were body weight, height, arm span, lengths, fat tissue, muscle tissue, somatotype and performance level, in relation to race finishing place. The mean characteristics presented by the Top Group (sailors ranked 1 to 45) were: body weight (48.3 ± 6.4 kg), height (159.9 ± 5.4 cm), arm span (167.4 ± 6.5 cm), trunk length (37.2 ± 3 cm), lower limb length (90.7 ± 3.9 cm), fat tissue (10.5 ± 1.6%), muscle tissue (45.5 ± 2.1%) and somatotype (endomorphy 2.4 ± 0.9; mesomorphy 4 ± 2.5 and ectomorphy 3.3 ± 0.9). A close relation was observed between finishing place and the variables of weight, height, age, arm span, lower limb length, upper arm girth, sum of skinfolds, muscle weight, bone weight and residual weight. Top sailors tend to be meso-ectomorphic, with significant values for muscle mass and linearity and low fat content.
HIV-1-Susceptible Cells: A New Way to Expressed on the Surface of Turns into a Neutralizing Antibody When A Nonneutralizing Anti-HIV-1 Antibody

Paul ZhouSeung-Jae Lee, Laura Garza, Jun Yao, Abner L. Notkins andhttp://www.jimmunol.org/content/173/7/4618J Immunol€2004; 173:4618-4626; ;Referenceshttp://www.jimmunol.org/content/173/7/4618.full#ref-list-1This article cites 39 articles, 24 of which you can access for free at: Subscriptionshttp://jimmunol.org/subscriptionsInformation about subscribing to The Journal of Immunology is online at: Permissionshttp://www.aai. org/ji/copyright.htmlSubmit copyright permission requests at: Email Alertshttp://jimmunol.org/cgi/alerts/etocReceive free email-alerts when new articles cite this article. Sign up at:
The dejuvenation of the Italian population

Abstract In recent decades, a process of structural reduction of the weight of new generations in overall population (dejuvenation) has been observed. In Italy, this process started in the 1970s and accelerated in the 1990s. We present here its main consequences for Italian society and economy. The number of Italian young people (aged 0–29) was reduced from 24.5 million in 1951 (51.6% of the population) to 17.5 million in 2016 (28.8%). What is more, many young Italians are becoming a wasted resource and a social cost, facing high rates of unemployment, long economic dependence on the family of origin, renunciation of full achievement of their life plans, distrust of institutions, low social and political participation, and increasing emigration flow. We analyze, using multivariate models, the data of the Rapporto Giovani survey held by the Toniolo Institute in 2015. Our main finding is that generational disadvantages not only hamper economic growth but, in a familistic context, also exacerbate social inequalities.
Arabidopsis NAC Transcription Factor JUNGBRUNNEN1 Exerts Conserved Control Over Gibberellin and Brassinosteroid Metabolism and Signaling Genes in Tomato

The Arabidopsis thaliana NAC transcription factor JUNGBRUNNEN1 (AtJUB1) regulates growth by directly repressing GA3ox1 and DWF4, two key genes involved in gibberellin (GA) and brassinosteroid (BR) biosynthesis, respectively, leading to GA and BR deficiency phenotypes. AtJUB1 also reduces the expression of PIF4, a bHLH transcription factor that positively controls cell elongation, while it stimulates the expression of DELLA genes, which are important repressors of growth. Here, we extend our previous findings by demonstrating that AtJUB1 induces similar GA and BR deficiency phenotypes and changes in gene expression when overexpressed in tomato (Solanum lycopersicum). Importantly, and in accordance with the growth phenotypes observed, AtJUB1 inhibits the expression of growth-supporting genes, namely the tomato orthologs of GA3ox1, DWF4 and PIF4, but activates the expression of DELLA orthologs, by directly binding to their promoters. Overexpression of AtJUB1 in tomato delays fruit ripening, which is accompanied by reduced expression of several ripening-related genes, and leads to an increase in the levels of various amino acids (mostly proline, β-alanine, and phenylalanine), γ-aminobutyric acid (GABA), and major organic acids including glutamic acid and aspartic acid. The fact that AtJUB1 exerts an inhibitory effect on the GA/BR biosynthesis and PIF4 genes but acts as a direct activator of DELLA genes in both, Arabidopsis and tomato, strongly supports the model that the molecular constituents of the JUNGBRUNNEN1 growth control module are considerably conserved across species.
Second Screening Politics in the Social Media Sphere: Advancing Research on Dual Screen Use in Political Communication with Evidence from 20 Countries

The pervasive use of multiple technological tools to engage with media and political content (i.e., TV sets, laptops, tablets, smartphones, etc.) has deeply altered the way citizens around the world consume information and discuss public affair issues. Many are using 2, or even several “screens” at the same time to do so, a phenomenon known as second or dual screening. The goal of this article is twofold. First, it introduces a set of novel studies published as a special section devoted to second screening. Second, based on nationally representative original survey data collected in twenty societies (N = 22.033), the study depicts a snapshot of second screening habits for news and politics around the world. Findings reveal that young people tend to second screen more than older counterparts. Similarly, there are also differences in political behaviors between groups of high and low frequency second screen users. More intensive users tend to politically express themselves in social media, and participate more often in offline political activities. On the other hand, results indicate little or no differences between these two groups in terms of their voting behavior.
Visual pigment bleaching in isolated salamander retinal cones. Microspectrophotometry and light adaptation

Visual pigment bleaching desensitizes rod photoreceptors greatly in excess of that due to loss of quantum catch. Whether this phenomenon also occurs in cone photoreceptors was investigated for isolated salamander red-sensitive cones. In parallel experiments, (a) visual pigment depletion by steps of bleaching light was measured by microspectrophotometry, and (b) flash sensitivity was measured by recording light-sensitive membrane current. In isolated cones, visual pigment bleaching permanently reduced flash sensitivity significantly below that due to the reduction in quantum catch, and there was little spontaneous recovery of visual pigment. The "extra" desensitization due to bleaching was most prominent up to bleaches of approximately 80% visual pigment and reached a level approximately 1 log unit beyond that due to loss of quantum catch. At higher bleaches, the effect of loss of quantum catch became more important. Bleaching did not greatly reduce the maximum light-suppressible membrane current. A 99% reduction of the visual pigment permanently reduced the circulating current by only 30%. Visual pigment bleaching speeded up the kinetics of dim flash responses. All electrical effects of bleaching were reversed on exposure to 11-cis retinal, which probably caused visual pigment regeneration. Light adaptation in photopic vision is known to involve significant visual pigment depletion. The present results indicate that cones operate with a maintained circulating current even after a large pigment depletion. It is shown how Weber/Fechner behavior may still be observed in photopic vision when the contributions of bleaching to adaptation are included.