Miracle-dz/UniFAR-FTUs huggingface dataset:
TRANSIENT BEAM LOADING IN THE DIAMOND STORAGE RING

Harmonic cavity systems have been installed on several 3rd generation light sources to lengthen the bunches and increase the Touschek lifetime. Apart from this beneficial effect, harmonic cavities are known to increase the transient beam loading in high-current machines, due to the presence of gaps in the fill pattern. The amplitude of this effect, which is substantially larger than that caused by the main RF system, can in turn produce considerable variations in bunch length and phase along the train, which result in a significant reduction of the lifetime increase. We have developed a tracking simulation, which we have applied to the analysis of the beam loading transients in Diamond, for the case of passive superconducting harmonic cavities. The influence of beam current, gap amplitude and harmonic cavity tuning on the final lifetime have been studied, as well as the effects of different coupling factors.
Overreaction and Portfolio Selection Strategies in the Tunisian Stock Market

Purpose - The purpose of this paper is to present a new strategy of portfolio selection. Design/methodology/approach - After making a comparative survey of different strategies of portfolio selection adopted by portfolio managers in Tunisia, the paper proposes a new strategy, which it calls weighted overreaction strategy. This strategy consists in over-weighting the stocks having bad performances in the past. Findings - The new proposed strategy turned out to be more performing than size, PER, and overreaction strategies in the Tunisian stock market via a mean equality test. Those who adopt it should create a loser portfolio and should sell it at a later period (12 months) and generate average annual returns of 241.75 percent. Research limitations/implications - This result deserves generalization to other stock markets. As the Tunisian stock market is marked by its looseness and low capitalization, applying this strategy over similar or more developed market would open the way for research aiming to define other strategies and to select the best one for each market. Indeed, it should investigate investors' behavior, which is certainly not the same in each stock market and outline the specific strategy for each market. Practical implications - The weighted overreaction strategy generated a considerable gain compared to other portfolios. Originality/value - The new proposed strategy turned out to be more performing than the other ones.
Age Related Changes in Human Placental Oxidative Stress and its Effect on Syncytial Apoptosis (Syncytial Knots Formation)

Oxidative stress represents an imbalance between reactive oxygen species (ROS) and cellular mechanisms for detoxifying the reactive intermediates or repairing the resulting damage, in this study oxidative stress was evaluated by anti-Mda antibodies that directed against malondialdhyde (Mda) in different placental regions (cord insertion, central, and peripheral) in different age groups (preterm, term, and postdate), and correlated with syncytial apoptosis expressed as syncytial knots count that stained with Tunel stain. A significant variation was found in anti-Mda antibody among age groups in all placental regions and syncytial knots count in peripheral region only at p≤0.05, with a highly significant positive correlation between syncytial knot counts and oxidative stress in peripheral region at termat r.0. 811, and significant negative correlation at r.0. 003 in postdate group in peripheral region. We conclude that oxidative stress play a major role in syncytial apoptosis as formation of syncytial knots that later on detached and liberated into the maternal circulation, this effect is more pronounced in the peripheral region of the placenta due to its distance from umbilical cord blood supply.
TRI-BAND METAMATERIAL-INSPIRED MONOPOLE ANTENNA WITH MODIFIED S-SHAPED RESONATOR

In this paper, a tri-band metamaterial-inspired monopole antenna is proposed for multi-band wireless applications. A metamate- rial consisting of three dual-band modifled S-shaped resonators (MSRs) is directly connected to a regular monopole element, which can not only support the two WiFi bands but also bring the resonant frequency of monopole element down to the WiMAX band while the length of the antenna is maintained unchanged. The simulated and measured results verify our design for the wireless applications.
Collective Entity Linking Method in Chinese Text Based on Topic Consistency

Entity Linking refers to the task of linking entity mentions in the given text with their referent entities in a knowledge base, which is a key technology of knowledge base expansion. However, the performance of traditional Chinese entity linking methods are affected by the incomplete Chinese knowledge base. Also they rarely use the semantic relevance between entities. Therefore, we propose a Chinese collective entity linking method based on the consistency of the topic, which considers both the content similarity and topic relevance of the co-occurrence entities, and propose a method for calculating the topic consistency of entities. This method implements batch links for multiple ambiguous entities that appear in the same text, and reduces the reliance on the local knowledge base by using the combination of the local knowledge base and the external knowledge base. Experimental results show that our method performs well over the traditional methods. And it is potentially effective.
Thermal interpretation of infrared dynamics in de Sitter

The infrared dynamics of a light, minimally coupled scalar field in de Sitter spacetime with Ricci curvature R = 12H2, averaged over horizon sized regions of physical volume VH = (4π/3)(1/H)3, can be interpreted as Brownian motion in a medium with de Sitter temperature TDS = ℏH/2π. We demonstrate this by directly deriving the effective action of scalar field fluctuations with wavelengths larger than the de Sitter curvature radius and generalizing Starobinsky's seminal results on stochastic inflation. The effective action describes stochastic dynamics and the fluctuating force drives the field to an equilibrium characterized by a thermal Gibbs distribution at temperature TDS which corresponds to a de Sitter invariant state. Hence, approach towards this state can be interpreted as thermalization. We show that the stochastic kinetic energy of the coarse-grained description corresponds to the norm of ∂μϕ and takes a well defined value per horizon volume ½⟨(∇ϕ)2⟩ = − ½TDS/VH. This approach allows for the non-perturbative computation of the de Sitter invariant stress energy tensor ⟨Tμν⟩ for an arbitrary scalar potential.
Photoluminescence properties of Sm~(3+)-doped LiY(MoO_4)_2 red phosphors

A series of novel Sm3+-doped LiY(MoO4)2 red phosphors under the UV excitation were synthesized by solid state reaction at 800 oC for 7 h. The data measured by X-ray diffraction(XRD) indicated that the samples were all pure phases of LiY(MoO4)2. Their excitation spectra had a broad band ranging from 250 to 350 nm and several sharp peaks. The centers of the peaks were located at about 365 nm(6H5/2→4D3/2), 378 nm(6H5/2→6P7/2), 406 nm(6H5/2→4F7/2), 420 nm(6H5/2→6P5/2), 442 nm(6H5/2→4G9/2), 471 nm(6H5/2→4I13/2) and 482 nm(6H5/2→4I9/2), respectively. The strongest emission was excited by 406 nm, and the main emissions were located at 568 nm(4G5/2→6H5/2), 610 nm(4G5/2→6H7/2), 649 nm(4G5/2→6H9/2) and 710 nm(4G5/2→6H11/2). Photoluminescence properties were determined for various concentrations of Sm3+-doped LiY(MoO4)2 host, and the luminescence intensity had the best value when x=0.02 in LiY1–x(MoO4)2:xSm3+.
Cellulose processing in ionic liquid based solvents

As the most abundant polymer in nature, cellulose has an undisputed role among the raw materials to be used in a sustainable future. From its native form, in wood or straw, cellulose can be processed into products such as paper and board. Through dissolution and precipitation, the range of cellulose based products can be increased to include textile fibers, thin continuous films, foams and membranes. Since cellulose is insoluble in most conventional solvents, ongoing research worldwide aims to find new, efficient and environmentally friendly solvent systems for biomass in general, and for cellulose in particular. In this thesis, the solvent of focus was 1-ethyl-3-methylimidazolium acetate, commonly abbreviated as EMIMAc. It is an ionic liquid, and belongs to a class of solvents which was basically unexploited by cellulose chemists until just over a decade ago. Results show that cellulose that is dissolved in EMIMAc, with or without a cosolvent, can be spun into continuous textile fibers using airgap spinning or wet spinning, or be cast into films. The properties of the produced fiber vary depending on the solution, cellulose sources and spinning parameters, such as drawing. For example, the regeneration medium was found to be of great importance for the crystallinity of regenerated films. Properties of regenerated cellulose can be further altered by drying conditions. It was also shown that some residual coagulation medium (water), which is time-consuming to remove in a solvent recycling step, can be tolerated in the EMIMAc to some extent if cellulose concentration or degree of polymerization is low. Finally, esterification of cellulose in EMIMAc was found to be improved by using cosolvents to regulate unintended acetylation, which until now, has been the dominant result in such reactions.
The eclipsing hypergiant R 81 (B2.5Ia-O) in the Large Magellanic Cloud - System properties from spectroscopic and photometric monitoring

The eclipsing P Cygni-type star R 81 (HDE 269128, HIP 24080) of spectral type B2.5 Ia-0 in the Large Magellanic Cloud was studied on the basis of a long continuous time series with simultaneous high-resolution Feros spectra and photometric measurements in the Stromgren system. The stellar parameters derived for the primary are Te = 19 500 K and R =9 6R. The orbital period of the binary is 74.566 days. The mean light curve shows two eclipses, a brightness maximum just after the eclipse of the hypergiant and a slow decline of brightness between the two minima. For the rst time, the orbital motion of the primary has been detected. The system is close and eccentric (e =0 :569) and both components nearly ll their Roche volumes. A spectral signature of the companion of the hypergiant has not been found. We suspect that the secondary is embedded in a shell or disk of material accreted from the primary. In addition, line prole variations with a period of about 11 days, probably caused by non-radial pulsation, were observed. The line proles indicate a strong wind from the primary with an outflow velocity of about 150 km s 1 . Near primary eclipse, strong absorptions in low excitation lines emerge abruptly that point to an outflow of enhanced density and higher velocity in the direction towards and beyond the secondary.
Radical Scavenging and Antioxidant Activity of Carthamus tinctorius Extracts

ABSTRACT Free radicals induce numerous diseases by lipid peroxidation, protein peroxidation, and DNA damage. It has been reported that numerous plant extracts have antioxidant activities to scavenge free radicals. In the present study, we examines the in vitro radical scavenging and antioxidant capacity of Crude extract of Carthamus tinctorius by using different in vitro analytical methodologies such as total antioxidant activity determination by ferric thiocyanate, hydrogen peroxide scavenging, 1,1-diphenyl-2-picryl-hydrazyl free radical (DPPH) scavenging, 2,2′-azino-bis(3-ethylbenzthiazoline-6-sulfonic acid) (ABTS) radical scavenging activity and superoxide anion radical scavenging by riboflavin–methionine-illuminate system. Also, butylated hydroxyanisole (BHA), butylated hydroxytoluene (BHT) and α-tocopherol were used as the reference antioxidant radical scavenger compounds. Extract inhibited 94.50% lipid peroxidation of linoleic acid emulsion at 20 μg/mL concentration. On the other hand, the above mentioned standard antioxidants indicated an inhibition of 93.75%, 96.66% and 83.33% on peroxidation of linoleic acid emulsion at 60 μg/mL concentration, respectively. In addition, hydrogen peroxide scavenging, DPPH scavenging, ABTS + radical scavenging and superoxide anion radical scavenging. Also, those various antioxidant activities were compared to BHA, BHT and α-tocopherol as references antioxidant compounds. The present study shows that Extract is the effective natural antioxidant component.
Molecular detection of Cylindrocarpon destructans in infected Chinese ginseng roots and soil

Ginseng (Panax ginseng C.A. Meyer) is one of the most important medicinal plants in China, but its yields are often reduced by a variety of root pathogens. The root rot of ginseng is a destructive soilborne disease caused by Cylindrocarpon destructans (teleomorph: Neonectria radicicola). A speciesspecific polymerase chain reaction (PCR) assay was developed for rapid detection of C. destructans in diseased ginseng roots and artificially inoculated soil. One pair of specific primers was designed from comparisons of nucleotide sequences of the nuclear ribosomal internal transcribed spacer (ITS) regions of 22 fungal isolates from northeast of China. Under stringent PCR conditions, primers CD-F and CD-R amplified only a 450 bp fragment from C. destructans DNA but not from other pathogens or negative control. The sensitivity of detection was 1 pg genomic DNA per 25 μl PCR reaction volume, and C. destructans could be specifically detected with CD-F/CD-R from infected ginseng roots and soil. The approach outlined here could be further utilized as a rapid and reliable tool for the diagnosis and monitoring of the root rot of ginseng.
Effects of nutrient enrichment on Prymnesium parvum population dynamics and toxicity: results from field experiments, Lake Possum Kingdom, USA

Large fish kills associated with toxic populations of the haptophyte Prymnesium parvum occur worldwide. In the past 5 yr, incidences of P. parvum blooms in inland water bodies of Texas (USA) have increased dramatically, where cell densities in excess of 1 × 10 7 cells l -1 are typically observed. We conducted field experiments (Lake Possum Kingdom) during the fall and early spring of 28 d duration using 24 enclosures of 1.57 m 3 each. The experiments investigated the effect of nutrient enrichment, immigration of P. parvum and addition of barley straw extract on phytoplankton biomass and assemblage structure, P. parvum population density, zooplankton biomass and assemblage struc- ture, bacteria, and toxicity. Nutrient enrichment stimulated P. parvum population growth beyond bloom proportions (>1 × 10 7 cells l -1 ). However, P. parvum did not dominate the assemblage under these conditions, as it does during natural blooms. Instead, euglenophytes and chlorophytes domi- nated. Toxicity, estimated using fish (Pimephales promelas) and cladoceran (Daphnia magna) bioas- says and which is linked to P. parvum's allelopathic and mixotrophic effectiveness, was greatly reduced (eliminated in many cases) under conditions of nutrient enrichment. The suppression of toxicity by nutrient addition suggested that targeted and time-limited nutrient manipulations might be used to mitigate the effects of P. parvum blooms. Immigration of P. parvum into natural assemblages and addition of barley straw extract had no significant effect on plankton dynamics.
Automatic selection of references for the creation of a biomedical literature review using citation mapping

Biomedical literature review are important research items that significantly contribute to the amelioration of the scientific awareness of physicians, pharmacists, health professionals as well as biologists. That is why several scientists had interest in the last few years in how to automate the process of the creation of such research publications. Unfortunately, the latest advances in citation analysis excepting the co-citation network analysis are not used in this automation process as it should be. That is why I define in this work a full workflow of how to use a combination of direct citation network analysis, basic Scientometrics and co-citation network analysis to choose the most relevant references to be considered in a given literature review from an initial set of papers. Keywords—Literature review, systematic review, narrative review, automation, citation analysis, citation network, co-citation network, citation mapping
Theoretical study of the interaction between vanadium oxide and HY-Zeolite elucidating loss activity of the catalyst

The study of the interaction between vanadium oxide and the HY-zeolite using molecular dynamics interaction was carried out for two systems: i) when vanadium oxide penetrates a zeolite ring at its center, and ii) when vanadium oxide impacts the zeolite surface model. The dynamical effects are used to investigate the reduced activity and eventual degradation of the catalyst for the vanadium oxide presence. In the first case, we observe the breaking of an OH-bond that belongs to the acid site. This is related to an initial loss activity stage of the catalyst. In the second case, vanadium oxide is weakly adsorbed onto the zeolite surface velocity depending. Density functional theory, with nonlocal exchange and correlation functional and the basis set of double numerical accuracy, is used to analyze the electronic structure. It was used in combination with Born-Oppenheimer dynamics to perform calculations.
Detecting relationships between the interannual variability in ecological time series and climate using a multivariate statistical approach--a case study on Helgoland Roads zooplankton

A multivariate statistical approach is presented that allows a systematic search for poten- tial relationships between the variability in ecological time series and climate records. In this study, interannual variability in large- and mesoscale climate variables in the North Sea region is compared with variability in local zooplankton observations from Helgoland. The species Noctiluca scintillans (Protozoa), Temora longicornis and Acartia sp. (Copepoda), and spionid larvae (Polychaeta) are exam- ined. The multivariate model detected several high correlations between zooplankton abundance and winter climate. Based on these correlations, complementary hypotheses about the causal relationships are discussed using available local data.
Aerosol size distribution seasonal characteristics measured in Tiksi, Russian Arctic

Abstract. Four years of continuous aerosol number size distribution measurements from the Arctic Climate Observatory in Tiksi, Russia, are analyzed. Tiksi is located in a region where in situ information on aerosol particle properties has not been previously available. Particle size distributions were measured with a differential mobility particle sizer (in the diameter range of 7–500 nm) and with an aerodynamic particle sizer (in the diameter range of 0.5–10 μm). Source region effects on particle modal features and number, and mass concentrations are presented for different seasons. The monthly median total aerosol number concentration in Tiksi ranges from 184 cm−3 in November to 724 cm−3 in July, with a local maximum in March of 481 cm−3. The total mass concentration has a distinct maximum in February–March of 1.72–2.38 μg m−3 and two minimums in June (0.42 μg m−3) and in September–October (0.36–0.57 μg m−3). These seasonal cycles in number and mass concentrations are related to isolated processes and phenomena such as Arctic haze in early spring, which increases accumulation and coarse-mode numbers, and secondary particle formation in spring and summer, which affects the nucleation and Aitken mode particle concentrations. Secondary particle formation was frequently observed in Tiksi and was shown to be slightly more common in marine, in comparison to continental, air flows. Particle formation rates were the highest in spring, while the particle growth rates peaked in summer. These results suggest two different origins for secondary particles, anthropogenic pollution being the important source in spring and biogenic emissions being significant in summer. The impact of temperature-dependent natural emissions on aerosol and cloud condensation nuclei numbers was significant: the increase in both the particle mass and the CCN (cloud condensation nuclei) number with temperature was found to be higher than in any previous study done over the boreal forest region. In addition to the precursor emissions of biogenic volatile organic compounds, the frequent Siberian forest fires, although far away, are suggested to play a role in Arctic aerosol composition during the warmest months. Five fire events were isolated based on clustering analysis, and the particle mass and cloud condensation nuclei number were shown to be somewhat affected by these events. In addition, during calm and cold months, aerosol concentrations were occasionally increased by local aerosol sources in trapping inversions. These results provide valuable information on interannual cycles and sources of Arctic aerosols.
Analysis of a Leaky Traveling Wave Antenna (Preprint)

Abstract : Several leaky traveling wave antennas using the first microstrip higher order mode were simulated with the Finite Difference Time Domain (FDTD) method. The leaky wave antennas investigated here differ from previous designs. The propagation constant of each antenna was extracted from the resulting guided field distribution for comparison with a transverse resonance approximation, measured far-field patterns, and other simulated antennas. Variations of geometry were explored to investigate the complex propagation constant and its effect on the far-field pattern and the bandwidth.
MORPHOLOGICAL METHOD, PCA AND LDA WITH NEURAL NETWORKSFACERECOGNITION

The problem is, these forms of machine identification and verification aren’t very secure, because they can be given away, taken away, or lost and motivated people have found ways to forge or circumvent these credentials. The ultimate form of electronic verification of a person’s identity is biometrics; using a physical attribute of the person to make a positive identification. So we need a system, which is similar to the human eye in some sense to identify a person. To cater this need and using the observations of human psychophysics, face recognition as a field emerged. Different approaches have been tried by several groups, working world wide, to solve this problem. Many commercial products have also found their way into the market using one or the other technique. But so far no system or technique exists which has shown satisfactory results in all circumstances. A comparison of these techniques needs to be done. In this paper, we will try to do a comparative study of the performances of three algorithms - PCA, LDA and Morphological methods for face recognition.