Miracle-dz/UniFAR-FTUs huggingface dataset:
A VARIATIONAL FORMULATION OF DISCONTINUOUS-GALERKIN TIME INTEGRATORS

Abstract. Variational integrators provide a way to design structure-preserving time integrators for problems presenting a Lagrangian structure. The basic idea consists in obtaining algorithms from a discrete analogue of Hamilton’s variational principle. Then, the discrete trajectories are stationary points of a discrete analogue of the action functional. The resulting methods enjoy a number of remarkable properties: i) they exactly conserves the momenta associated to the symmetries of a discrete version of the Lagrangian, ii) they define a discrete symplectic flow on the phase space and iii) they show an error in the total energy that remains bounded for exponentially long periods of time. A particularly interesting family of such methods is given by the so called Galerkin variational integrators. Their construction is based on approximating the trajectory of the system by means of piecewise continuous polynomials and providing suitable quadrature rules to approximate the action functional. Then, increasing the order of the interpolating polynomials and the accuracy of the quadrature rules allow to obtain higher order time integrators. In this work we extend the Galerkin methods to the discontinuous case yielding to a family of discontinuous-Galerkin (dG)-methods. To this end, we resort to using two key ingredients: 1) the trajectory of the system is approximated by means of piecewise polynomials which may presents a finite number of discontinuities across time interval boundaries and 2) we approximate the velocity of the system by means of an appropriate dG-time-derivative of the trajectory following some ideas presented in [1, 2] for static problems in elasticity. The resulting algorithms corresponds to a family of discontinuous-symplectic Runge-Kutta methods.
New Insights into North European and North Atlantic Surface Pressure Variability, Storminess, and Related Climatic Change since 1830

Abstract The authors present initial results of a new pan-European and international storminess since 1800 as interpreted from European and North Atlantic barometric pressure variability (SENABAR) project. This first stage analyzes results of a new daily pressure variability index, dp(abs)24, from long-running meteorological stations in Denmark, the Faroe Islands, Greenland, Iceland, the United Kingdom, and Ireland, some with data from as far back as the 1830s. It is shown that dp(abs)24 is significantly related to wind speed and is therefore a good measure of Atlantic and Northwest European storminess and climatic variations. The authors investigate the temporal and spatial consistency of dp(abs)24, the connection between annual and seasonal dp(abs)24 and the North Atlantic Oscillation Index (NAOI), as well as dp(abs)24 links with historical storm records. The results show periods of relatively high dp(abs)24 and enhanced storminess around 1900 and the early to mid-1990s, and a relatively quiescent perio.
Biochemical basis of resistance in eggplant (Solanum melongena L.) to Leucinodes orbonalis Guenee and their correlation with shoot and fruit infestation.

Studies on the biochemical basis of resistance to Leucinodes orbonalis Guenee and their correlation with shoot and fruit borer damage in five selected brinjal genotypes done at Tamil Nadu Agricultural University, India during June to December 2005 showed that both shoot and fruit of less susceptible genotypes had the higher amount of poly phenol oxidase (PPO), phenylalanine ammonium lyase (PAL) and lignin and lower amount of reducing sugar. Significant negative correlation was found between percent infestation (shoot and fruit) with PPO, PAL and lignin content, whereas it was positively correlated with reducing sugar content. Among the biochemical constituents, PPO, PAL and lignin contents were negatively correlated with reducing sugar but PPO were positively correlated with PAL and lignin content and vice-versa. Keywords: Biochemical basis; resistacace; eggplant; Leucinodes orbonalis . DOI: 10.3329/bjar.v35i1. 5876 Bangladesh J. Agril. Res. 35(1) : 149-155, March 2010
Organocopper chemistry of quinone bisketals. Application to the synthesis of isoprenoid quinone systems

Bei der anodischen Oxidation des 1,4-Dimethoxy-naphthalins (I) entsteht in Methanol das Ketal (II), das mit Butyllithium und Cu(I)-iod sowie Dimethylsulfid in die Organometallverbindungen (III) ubergeht und dann mit den Bromiden (IV) zu den Isoprenoid-Naphthochinonen (V) kondensiert wird.
A new incompressible Navier-Stokes solver combining Fourier pseudo-spectral and immersed boundary methods

A new numerical methodology combining Fourier pseudo-spectral and immersed boundary methods - IMERSPEC - is developed for fluid flow prob- lems governed by the incompressible Navier-Stokes equations. The numerical al- gorithm consists in a classical Fourier pseudo-spectral methodology using the col- location method where wall boundary conditions are modelled by using an im- mersed boundary method (IBM). The performance of that new methodology is exemplified in two-dimensional numerical simulations of Green-Taylor decaying vortex, lid-driven cavity and flow over a square cylinder. The convergence rate, the accuracy, the influence of the Reynolds number and the external domain size are analyzed. This new method combines some advantages of high accuracy and low computational cost provided by Fourier pseudo-spectral methods (FPSM) with the possibility of tackling complex geometries given by immersed boundary method.
The multivariate asymmetric slash Laplace distribution and its applications

We have introduced a multivariate asymmetric-slash Laplace distribution, a flexible distribution that can take skewness and heavy tails into account. This distribution is useful in simulation studies where it can introduce distributional challenges in order to evaluate a statistical procedure. It is also useful in analyzing data sets that do not follow the normal law. We have used the microarray data set for illustration. The asymmetric slash Laplace distribution provides the possibility of modelling impulsiveness and skewness required for gene expression data. Hence, the probability distribution presented in this paper will be very useful in estimation and detection problems involving gene expression data. The multivariate asymmetric-slash Laplace distribution introduced in this article is clearly an alternative to multivariate skew-slash distributions because it can model skewness, peakedness and heavy tails. One interesting advantage of the multivariate asymmetric slash Laplace distribution is that its moments can be computed analytically by taking advantage of the moments of the multivariate asymmetric Laplace distribution, see the discussion in Section 3. Another attractive feature is that simulations from the multivariate asymmetric-slash Laplace distribution are straightforward from softwares that permit simulations from the multivariate asymmetric Laplace or Laplace distribution. We believe that the new class will be useful for analyzing data sets having skewness and heavy tails. Heavy-tailed distributions are commonly found in complex multi-component systems like ecological systems, biometry, economics, sociology, internet traffic, finance, business etc.
Aboriginal Provincial Party Support in Manitoba

Aboriginal people, and particularly First Nations persons residing either on-reserve or off-reserve, face realities that are distinct from much of the general Canadian population. Although many services for First Nations people fall under federal jurisdiction, First Nations are also directly affected by provincial government policies and initiatives, such as natural resource development and transportation infrastructure, among other things; accordingly, provincial policies are of immediate interest to the on-reserve Aboriginal electorate. Yet despite this, Aboriginal provincial party support has yet to be fully explored in Canada. This paper will examine Aboriginal provincial party support in Manitoba by analyzing two data sources: 2007 Manitoba Election poll results supplied by Elections Manitoba and survey data from Probe Research’s Indigenous Voices Survey. The paper seeks to answer two questions: what are the provincial party preferences among Aboriginal Manitobans; and how can variations (or lack thereof) in Aboriginal party preferences be explained?
Prediabetes and serum insulin levels

Prediabetes is a state of hyperglycaemia characterized by elevation of blood glucose levels higher than normal but lower than the values of frank diabetes. To date, prediabetes remains a topic of concern for many researchers because of its deleterious complications on health. Prediabetes does not only put the patient at higher risk for developing diabetes mellitus, but is also associated with negative consequences on renal, retinal, and peripheral nervous tissues. The benefit of identification of this state is that multiple prospective studies confirmed that early lifestyle modifications and dietary intervention at this prediabetic state had significantly improved the outcome and prevented longterm complications.
PERSONALITY, ORGANIZATIONAL COMMITMENT, AND JOB SEARCH BEHAVIOR: A FIELD STUDY

This field study examined the relationships among the personality traits conscientiousness and openness to experience; organizational commitment; and job search behaviors in a work environment, to test hypotheses about the relationships of three types of commitment – affective, normative and continuance – with the personality traits and search behaviors, using established measures. Participants were 282 employees of cell phone sales organization located in the Southeastern United States, who completed on-line surveys. As hypothesized, individual conscientiousness showed a strong positive relationship with affective, normative and continuance commitment and a strong negative relationship with job search behaviors. Openness to experience showed the expected, positive association with job search behaviors. Affective, normative and continuance commitment all showed negative relationships with job search behaviors. Consistent with predictions, statistical modeling showed that affective and continuance (but not normative) commitment mediated the relationships of conscientiousness (but not openness) with job search behaviors. These findings carry implications for theory, research, and practical application.
FDD Algorithm for an AHU Reverse-Return System

A fault detection and diagnosis (FDD) algorithm was developed for an AHU reverse-return system for air cooling. These FDD rules were generated using simulation in three steps. Cause-effect rules were established by connecting the faults and their related effects. The FDD rules were developed for the following faults: old valve, fouled return pipe, fault in the outlet air temperature sensor, fault in the temperature sensor for the inlet temperature, bad position of the sensor for pressure difference. The effects of the involved faults were observed on four system performances. The results showed that increase in both the cooling coil rate and the pump rate appear due to faults in sensors. The inaccurate measurement of the pressure difference and the fault in the control valve do not affect the AHU outlet air temperatures. Increase in both the outlet air temperature and the pump power consumption appears due to the fouled return pipes.
Evaluation of drought tolerance of γ-irradiated mutants of Hordeum vulgare

The various physio- and biochemical parameters including photosynthetic rate, stomatal conductance, transpiration rate, relative average growth, chlorophyll content, soluble sugar and proline content were investigated on mutant Hordeum vulgare obtained from first generation upon two doses of γ-rays, viz., 300 and 350 Gy, respectively. The level of stress marker “proline” was accumulated higher whereas physiological parameters were decreased at these doses as compared to control ones. Thus, γ-rays irradiations have strong mutagenic impact which led to generation of reactive oxygen species (ROX) on barley and its mutagenecity could be interesting to understand this mechanism of mutation. Key words: Hordeum vulgare, field capacity, γ-rays, mutation, stomatal conductance.
Hypergeometric solutions to Schrödinger equations for the quantum Painlevé equations

We consider Schrödinger equations for the quantum Painlevé equations. We present hypergeometric solutions of the Schrödinger equations for the quantum Painlevé equations, as particular solutions. We also give a representation theoretic correspondence between Hamiltonians of the Schrödinger equations for the quantum Painlevé equations and those of the Knizhnik-Zamolodchikov (KZ) equation or the confluent KZ equations. C © 2011 American Institute of Physics. [doi:10.1063/1.3620412]
Population trapping in three-state quantum loops revealed by Householder reflections

Population trapping occurs when a particular quantum-state superposition is immune to action by a specific interaction, such as the well-known dark state in a three-state lambda system. We here show that in a three-state loop linkage, a Hilbert-space Householder reflection breaks the loop and presents the linkage as a single chain. With certain conditions on the interaction parameters, this chain can break into a simple two-state system and an additional spectator state. Alternatively, a two-photon resonance condition in this Householder-basis chain can be enforced, which heralds the existence of another spectator state. These spectator states generalize the usual dark state to include contributions from all three bare basis states and disclose hidden population trapping effects, and hence hidden constants of motion. Insofar as a spectator state simplifies the overall dynamics, its existence facilitates the derivation of analytic solutions and the design of recipes for quantum state engineering in the loop system. Moreover, it is shown that a suitable sequence of Householder transformations can cast an arbitrary N-dimensional hermitian Hamiltonian into a tridiagonal form. The implication is that a general N-state system, with arbitrary linkage patterns where each state connects to any other state, can be reduced to an equivalent chainwise-connected system, with nearest-neighbor interactions only, with ensuing possibilities for discovering hidden multidimensional spectator states and constants of motion.
Phonon eigenvectors of chiral nanotubes

Although a commonly neglected fact, the physical properties of chiral carbon nanotubes may differ significantly from those of the usually considered, simpler achiral tubes. We show that the phonon eigenvectors, e.g., of the high-energy eigenmodes no longer fall into axial and circumferential modes as in armchair and zig-zag nanotubes. The atomic displacement may, instead, point in any tangential direction and even show an angular dependence of its direction around the circumference, as the results of ab initio calculations demonstrate.
Title The Impact of Multiple Roles on Psychological Distress among JapaneseWorkers

Background: There has been considerable interest in Japanese society in the problem of work-related stress leading to depressive symptoms, and an increasing number of primary houseworkers maintain paid employment. The purpose of this study was to examine the differential impact of multiple roles associated with psychological distress among Japanese workers. Methods: We studied 722 men and women aged 18e83 years in a cross-sectional study. The K10 questionnaire was used to examine psychological distress. Results: The proportion of participants with psychological distress was higher in women (17.8%) compared with men (11.5%). Having three roles significantly decreased the risk of psychological distress [women: odds ratio (OR), 0.37-fold; men: OR, 0.41] compared with only one role. In working married women, there was significantly less psychological distress (OR, 0.27), and those with childrearing or caregiving responsibilities for elderly parents had significantly less psychological distress (OR, 0.38) than those with only an employment role. Similarly, working married men who had childrearing or caregiving responsibilities for elderly parents had significantly less psychological distress (OR, 0.41) than those who had only an employment role. Conclusion: The present study demonstrated that participants who had only an employment role had an increased risk of psychological distress. The degree of psychological distress was not determined solely by the number of roles. It is important to have balance between work and family life to reduce role conflict and/or role submersion, which in turn may reduce the risk of psychological distress. 2015, Occupational Safety and Health Research Institute. Published by Elsevier. All rights reserved.
DEVELOPMENTS IN TWO-TIME-SCALE TURBULENCE MODELS APPLIED TO NON-EQUILIBRIUM FLOWS

Multiple-time-scale models have been recently studied by the authors with focus on predicting non-equilibrium flows. Two two-time-scale linear-eddy-viscosity models have been further developed, improved and tested over a wide range of test cases, including simple flows, such as channel flows and zero pressure gradient boundary layers, and more complex flows such as homogeneous shear flows, adverse-pressuregradient, favourable-pressure-gradient and oscillatory boundary layers, normally strained flows, fully developed ramp up and oscillatory pipe flows and steady backward facing step flows. The two new models performed reasonably well in all test cases, specially when taking into account the inherent limitations of linear-eddy-viscosity schemes.
Characterisation of candidate members of (136108) Haumea's family II. Follow-up observations

Context. From a dynamical analysis of the orbital elements of trans-Neptunian objects (TNOs), Ragozzine & Brown (2007, AJ, 134, 2160) reported a list of candidate members of the first collisional family found among this population, associated with (136 108) Haumea (a.k.a. 2003 EL 61). Aims. We aim to distinguish the true members of the Haumea collisional family from interlopers. We search for water ice on their surfaces, which is a common characteristic of the known family members. The properties of the confirmed family are used to constrain the formation mechanism of Haumea, its satellites, and its family. Methods. Optical and near-infrared photometry is used to identify water ice. We use in particular the CH 4 filter of the Hawk-I in-strument at the European Southern Observatory Very Large Telescope as a short H-band (H S), the (J − H S) colour being a sensitive measure of the water ice absorption band at 1.6 μm. Results. Continuing our previous study headed by Snodgrass, we report colours for 8 candidate family members, including near-infrared colours for 5. We confirm one object as a genuine member of the collisional family (2003 UZ 117), and reject 5 others. The lack of infrared data for the two remaining objects prevent any conclusion from being drawn. The total number of rejected members is therefore 17. The 11 confirmed members represent only a third of the 36 candidates. Conclusions. The origin of Haumea's family is likely to be related to an impact event. However, a scenario explaining all the pecu-liarities of Haumea itself and its family remains elusive.
Investigation of the activity of sawdust as biosorbent towards Cr (VI) removal from waste water: Kinetic and thermodynamic studies

Cr (VI) removal from aqueous solutions by Ziziphus mauritiana (Indian jujube) sawdust biosorbent (ZMSDB) was studied in a batch mode technique. The effect of pH (2-7), contact time (10-360 minutes), temperature (293-313 K) and biosorbent dosage (0.2-1.0 g) was investigated for Cr (VI) uptake. Maximum removal of Cr (VI) was found at pH 2.0 and 3.0. Equilibrium was established in 360 minutes. The adsorption rate was best described by pseudo-second order equation. Langmuir adsorption isotherm determines the adsorption equilibrium and the monolayer adsorption capacity of Cr (VI) was found to be 3.66 mg g -1 at 313 K. The values of separation factor, R L, was in flanked by 0.019 -0.0557 which pointed out constructive exclusion of Chromium (VI) over ZMSDB. Thermodynamic parameters ( �H, �G andS) values exposed the endothermic biosorption of Cr (VI) on ZMSDB, no-spontaneity and low entropy in nature.
Efficency of inoculating the green algae Chlorella and Scenedesmus to prevent cyanobacteria growing in Nile tilapia culture

he purpose of this study was seeding or inoculating the Chlorella elliposoidea (Gerneck) + Scenedesmus bijuga (Turpin) as green algae at the beginning of the production season (or before the preferable time of cyanobacteria growing) to propagate and prevent the growth of harmful cyanobacteria in the Nile tilapia culture via glass aquaria. Indoor experiment was carried out in natural light using 12 glass aquaria as four groups (3 replicates each). Ten Nile tilapia fingerlings were stocked (Oreochromis niloticus) in each aquarium. The cyanobacteria were not appeared in the fish aquaria which were seeded or inoculated with Chlorella + Scenedesmus 20 x 10 cells ml (T3) at day 5 and 10. The cyanobacterial count was lower in the second treatment (T2). Significant differences were observed between the cyanobacterial count on day 5 and 10 in the control aquaria and those inoculated with Chlorella + Scenedesmus sp. (p < 0.05). Higher counts of green algae were observed in aquaria inoculated with the highest dose of Chlorella + Scenedesmus sp. (T3). Generally, the green algal count in control aquaria was the lowest, followed by those treated with 10 x 10 cells ml Chlorella + Scenedesmus sp. (T1). No significant differences were observed in the green algae and cyanobacteria counts on day 5 and 10 between T2 and T3 (P < 0.05). The present experiment showed that the presence of Chlorella + Scenedesmus sp. is sufficient to control the growth of cyanobacteria for 10 days period in the Nile tilapia culture.