Miracle-dz/UniFAR-FTUs huggingface dataset:
The Entrepreneurial Orientation and its Impact on Competitiveness and Growth: Empirical Evidence in the State of Aguascalientes in Mexico

Nowadays, increasing attention is being paid to entrepreneurship in general and entrepreneurship in developing countries, therefore entrepreneurship is one of the factors to change developing countries and is considered a micro-driver of innovation and economic growth. Schumpeter has stated that main agent of economic development is entrepreneurs stimulating the new products, new production methods and economical activities and making out other innovations. The entrepreneurship capacity determines the competitiveness of an organization. Therefore entrepreneurs are considered a vital resource. For this reason, the development of a culture of entrepreneurship in society is a basic tool for the economic and social development which improves the competitiveness of a country. Thus, the essential objective of this paper is to analyze the effects of entrepreneurial orientation on competitiveness and growth of manufacturing companies with an emphasis in the automotive and auto parts industry, using for it a sample of 217 firms of the State of Aguascalientes in Mexico. The obtained results show that entrepreneurial orientation has a positive influence on competitiveness and growth of the manufacturing companies in the State of Aguascalientes in Mexico. Â
Electrochemical Treatment of 4-Nitrophenol-Containing Aqueous Wastes Using Boron-Doped Diamond Anodes

The electrochemical oxidation of aqueous wastes containing 4-nitrophenol (4-NP) using a boron-doped diamond thin-film electrode has been studied. Within the parameter ranges used (150−4000 mg of 4-NP dm-3, pH 2−12, 30−60 mA cm-2, 25−60 °C), the complete treatment of the organic waste was achieved. The maximum current efficiencies were obtained under kinetic control. On the basis of the results of voltammetric and galvanostatic electrolysis studies, a simple mechanistic model was proposed. The first stage in the treatment of 4-NP-containing aqueous wastes is the release of the nitro group from the aromatic ring. As a consequence, phenol or quinones are formed. These organic compounds are oxidized first to carboxylic acids (maleic and oxalic) and later to carbon dioxide. On the cathode, the reduction of the 4-NP to 4-aminophenol takes place. In alkaline media, this compound can be polymerized and transformed into a dark brown solid.
The Impact of the FIFA 11+ Program on the Injury in Soccer Players: A Systematic Review

OBJECTIVES The purpose of this study was to integrate information about the effects of FIFA 11+ injury prevention program in soccer. DESIGN AND METHODS Systematic review. We used PubMed, Medline, PMC, and Web of Science to search randomized controlled trials comparing FIFA 11+ injury prevention program with control groups among soccer players. RESULTS Total of 13 studies was selected through eligibility criteria. 7 studies included overall, ankle, knee, and hamstring injury rate between FIFA 11+ versus control groups, while the other 6 studies included improvement of physical performance, such as vertical jump, 20m sprint, agility, hip adduction strength, and FMS total score between FIFA 11+ versus control groups. There was a lower rate of injury in the intervention group from all 7 studies. Couple of studies had different criteria to compare with other studies. Most values of physical performance were also significantly improved from all 6 studies except for the values of agility time. CONCLUSIONS Multiple studies have proven injury rate reduction and physical performance improvement of FIFA 11+ program between intervention and control groups. We also found that it at least required a few weeks of intervention time to be effective. Therefore, coaches and players might need to consider including FIFA 11+ program as a warm-up period to prepare the regular season.
Effect of Plant Toughness, Calcification, and Chemistry on Herbivory by Dolabella Auricularia

Most studies of feeding preferences of herbivores have focussed on the role of plant secondary metabolites; very few studies have experimentally tested the importance of plant toughness or calcification as feeding deterrents, although low preference has re- peatedly been shown to correlate with these factors. Feeding preferences of the unusual generalist herbivore Dolabella auricularia, an opisthobranch gastropod which, like many other herbivores of that group, sequesters secondary metabolites from some algae, were consistent with our expectation that they might not feed on algae and seagrasses that were tough, calcified, or chemically rich. We experimentally examined the importance of each of these three features in deterring feeding by Dolabella. Consumption of plants by Dolab/lla was negatively correlated with plant toughness, as determined by penetrometer measurements. Given a choice between two species of plants, Dolahella always preferred the softer of the pair. However, when both species were ground up and incorporated into soft carrageenan cakes, Dolabella were significantly less selective in 3 of 4 cases where the tougher plant had no other known line of defense, and in 1 of 3 cases where the tougher plant also had chemical or CaCO3 defenses. Frondose calcified algae on Guam are ? 50% CaCO3 by dry mass. CaCO3 deterred Dolabella feeding at concentrations of 28 and 50% of dry mass, but not at 16%. CaCO3 occurs in algae in two crystal structures, calcite and aragonite; both deterred Dolabella feeding. CaCO, and chem- ical defenses of lali/tneda tnacroloba did not interact synergistically to enhance effective- ness. Dolabella feeding was not deterred by organic extracts from most plants, even when offered at very high concentrations. Extracts from many of these plants had previously been shown to deter feeding by fishes at lower concentrations. Of the 12 plants tested, Dolabella feeding was deterred only by extracts from Caulerpa racemosa, Hortmothaannion enteromorphoidcs, and lIalimeda inacroloha. We isolated and tested the two major me- tabolites of Caulerpa, caulerpenyne and caulerpin, and identified caulerpenyne as the de- terrent agent. These results indicate that Dolabella are relatively unaffected by chemical defenses and yet are deterred by other plant defenses such as calcification and toughness. The fact that IDolabella can sequester algal secondary metabolites may explain Dolabella's relative in- difference to chemically rich plant extracts.
Deep Neural Network-Based Detection and Partial Response Equalization for Multilayer Magnetic Recording

To increase the storage capacity limit of magnetic recording channels, recent studies proposed multilayer magnetic recording (MLMR): the vertical stacking of magnetic media layers. MLMR readback waveforms consist of the superposition of signals from each layer recovered by a read head placed above the upper layer. This article considers the problem of equalization and detection for MLMR comprising two layers. To this end, we use MLMR waveforms generated using a grain switching probability (GSP) model that is trained on realistic micromagnetic simulations. We propose three systems for equalization and detection. The first is a convolutional neural network (CNN) equalizer followed by an MLMR Viterbi algorithm (VA) for detection. We show that this system outperforms the traditional 2-D linear minimum mean squared error (2-D-LMMSE) equalizer. The second system uses CNNs for equalization and separation of signals from each layer, which is followed by a regular VA. The third system contains CNNs trained to directly provide soft bit estimates. By interfacing the CNN detector with a channel decoder, we show that an areal density gain of 16.2% can be achieved by a two-layer MLMR system over a one-layer system.
Interrelation between Primary and Secondary Relaxations in Polymerizing Systems Based on Epoxy Resins

There is a wealth of experimental data published on the change of molecular dynamics of epoxy resins during polymerization reaction. Common aspects are an increase of the primary α-relaxation time τα and a broadening of the α-relaxation process during the polymerization reaction. In this paper we discuss systematic changes in the two secondary relaxations β and γ on the way from a neat molecular glass-former to the fully polymerized state based on literature data and new dielectric results for diglycidyl ether of bisphenol A (DGEBA) cured with ethylenediamine (EDA). The discussion is focused on common trends in the relaxation time τβ which were not reported previously. It is shown that the relative changes of τα andτβ during the polymerization process are in accord with the predictions of the coupling model and that it is the β-relaxation which is the initiator of the α-relaxation of the epoxy resins in its neat state as well as the initiator of the local segmental relaxation of polymerized or cross-linke.
Implant survival and risk factor analysis in regenerated bone: results from a 5-year retrospective study

Purpose The aims of this study were to evaluate the 5-year cumulative survival rate (CSR) of implants placed with guided bone regeneration (GBR) compared to implants placed in native bone, and to identify factors contributing to implant failure in regenerated bone. Methods This retrospective cohort study included 240 patients who had implant placement either with a GBR procedure (regenerated bone group) or with pristine bone (native bone group). Data on demographic features (age, sex, smoking, and medical history), location of the implant, implant-specific features, and grafting procedures and materials were collected. The 5-year CSRs in both groups were estimated using Kaplan-Meier analysis. Risk factors for implant failure were analyzed with a Cox proportional hazards model. Results In total, 264 implants in the native bone group and 133 implants in the regenerated bone group were analyzed. The 5-year CSRs were 96.4% in the regenerated bone group and 97.5% in the native bone group, which was not a significant difference. The multivariable analysis confirmed that bone status was not an independent risk factor for implant failure. However, smoking significantly increased the failure rate (hazard ratio, 10.7; P=0.002). Conclusions The 5-year CSR of implants placed in regenerated bone using GBR was comparable to that of implants placed in native bone. Smoking significantly increased the risk of implant failure in both groups.
Impregnation of peat soils using polyethylene glycol 4000 for the preparation of thin sections

Abstract A method was developed to impregnate peat soils for the preparation of thin sections. Peat soil samples used consisted of wet tropical peat collected from Indonesia. To allow miscible impregnation without prior water replacement from the sample, polyethylene glycol 4000 was used as the impregnant because this material is soluble in water in all proportions. The impregnation procedure consisted of consecutive heat-immersion of the samples at 60 to 70°C in polyethylene glycol 4000 solutions with increasing concentrations. Consecutive impregnation for 2, 3, 4, and 5 d in 25, 50, 75, and 100% polyethylene glycol 4000 solutions, respectively, was found to be suitable for impregnating and hardening the samples. The heating temperature during the period of impregnation should be properly kept so as to avoid too fast vaporization, bubbling, or even boiling, while maintaining polyethylene glycol 4000 always under solution conditions. Immersed conditions should be maintained in order to avoid air trapping. After the impregnation was completed, the samples should be cooled slowly to allow homogeneous solidification of polyethylene glycol 4000. For the preparation of thin sections, a sliding microtome was used to obtain slices as thick as 20-30 µm after coating with a cellulose adhesive. The proposed method was found to be convenient for, and applicable to the preparation of high quality thin sections of peat soils.
Agile Roadmapping: A management Tool for Digital Entrepreneurship

How to adapt and still get the full potential of roadmapping to the context of Digital Entrepreneurship (DE)? To answer this question and design an agile roadmapping approach to support highly incremental planning done by startups, this article unfolded through a three-phase action research program that lasted 40 months and involved three startups and two startup accelerators. Typically, startups are not complex organizations but operate in turbulent markets—requiring constant changes in strategy, organization, and product decisions. Such an environment is notably adherent to the assumptions of agile methods, but not so to roadmapping, an approach typically tuned for larger companies. Thus, the DE context is explored to adapt the roadmapping approach to agile principles aiming at offering a nimble, living, and integrated process that can enhance business, product, and organizational decisions in startups. Finally, the resulting method helps to support 1) strategic to operational management by continuous planning of small teams dealing with constant changes; 2) better communication between investors, technical, and business members; 3) better absorption of roadmapping and its benefits by teams already proficient in agile approaches, and 4) better balance between plan and action in startups.
Pension and Health Services Utilization: Evidence from Social Pension Expansion in China

The proportion of people aged 60 years or over is growing faster than other age groups. The well-being older adults depend heavily on their state of health. This study evaluates the effects of pensions on older adults' health service utilization, and estimates the size of pension required to influence such utilization. Using a nationally representative survey, the China Health and Retirement Longitudinal Study (CHARLS), we adopted a fuzzy regression discontinuity design and undertook segmented regression analysis. Pension demonstrated heterogeneous effects on health service utilization by income. We show that pension encouraged low-income individuals to use both outpatient (OR = 1.219, 95% 1.018-1.460) and inpatient services (OR = 1.269, 95% 1.020-1.579). In the meantime, it promoted self-treatment, specifically over-the-counter (OR = 1.208, 95% 1.037-1.407; OR = 1.206, 95% 1.024-1.419; respectively) and traditional Chinese medicines (OR = 1.452, 95% 1.094-1.932; OR = 1.456, 95% 1.079-1.955; respectively) among all income groups. However, receiving a pension had no effect on the frequency of outpatient or inpatient service use. Breakpoints for pension to promote health service utilization were mainly located in the range 55-95 CNY (7.1-12.3 EUR or 8.0-13.8 USD). Our study enriches the literature on pension and healthcare-seeking behaviour, and can be helpful in policy design and model formulation.
EFFECTS OF DOSING AND MIXING CONDITIONS ON POLYMER FLOCCULATION OF CONCENTRATED SUSPENSIONS

A simple monitoring technique has been used to derive information on Hoc growth and break-up in agitated clay suspensions of quite high solids content (1 and 3% w/v), under the influence of a high molecular weight cationic polymer. For fairly low polymer dosages and high mixing speeds floe growth in the 3% suspensions can be very fast initially, but the floes rapidly break up and do not re-form, even when the stirring speed is subsequently reduced. By reducing the mixing speed very soon after polymer dosing (typically after a few seconds), the break-up can be prevented and floes maintained at larger sizes. This effect is much less apparent for 1% solids suspensions, where longer periods of rapid mixing can be tolerated without significant floe break-up. For the higher solids case, great improvements in flocculation can be achieved by modifying the polymer dosing procedure—either by adding the solution over an extended period or by dosing a more dilute solution. These changes have much less effect at the l.
Effect of Leaf Removal on Composition of Wine Grape Varieties Grown in Semiarid Tropical Climate of India

Removing leaves from cluster zone is one of the management practices followed to improve fruit composition in temperate wine grape growing countries. However, knowledge on canopy management practices to improve fruit and juice composition for quality wine making is still lacking in semiarid tropical regions of India. Due to ample sunlight availability during fruit growth in semiarid tropics, it is unclear whether the leaves have to be removed from cluster zone. In case the leaves have to be removed, the direction from which it has to be done is also important. Hence, this study was conducted to see the effect of leaf removal from two sides of canopy on fruit composition in two wine grape varieties. In Cabernet Sauvignon vines leaf removal from both east and west side of the canopyimproved fruit quality in terms of reduced pH, potassium, malic acid and increased phenolics. Nevertheless, removing leaves from eastern side was found to be better than western side, because clusters are exposed toexcess sunlight. However, in Sauvignon Blanc, leaf removal from east side improved most of the desirable fruit composition parameters, while leaf removal from west side reduced the fruit quality in terms of sugars, acids, pH, total phenols etc.
Folding of bundles of α‐helices in solution, membranes, and adsorbed overlayers

We propose a coarse‐grained lattice model for Monte Carlo simulations of folding of proteins consisting of several α‐helices. A chain representing a protein is considered to contain A and B monomers forming relatively stiff A subchains, mimicking helices, and flexible B links between these subchains, respectively. Using this model, we simulate (1) folding of four‐helix proteins in solution; (2) folding of membrane proteins containing one, two, or four helices; and (3) refolding of four‐helix proteins adsorbed at the liquid–solid interface. For these cases, we show typical scenarios of protein folding and refolding and study the dependence of the folding time on the chain length. Combining the latter results with those already available in the literature, we discuss the relative rates of folding of proteins belonging to different classes. Proteins 2001;42:481–494. © 2001 Wiley‐Liss, Inc.
Optimization for Wireless-Powered IoT Networks Enabled by an Energy-Limited UAV Under Practical Energy Consumption Model

This letter investigates an energy-limited unmanned aerial vehicle (UAV)-enabled wireless-powered Internet-of-Things (IoT) networks. Herein, we propose an energy-constrained/limited fly-and-hover energy harvest (EFH-EH) scheme. The UAV charges the IoT sensors during its flying time, while the hovering time of the UAV above each sensor is divided into two parts, one for energy transfer and the other for information transmission. In particular, a maximum available energy constraint is imposed on the UAV to capture UAV’s real-world energy-limited feature. In addition, a practical UAV energy consumption model is adopted, which differentiates the hovering, flying, and charging energy consumption of the UAV. Under these practical constraints, we study the optimal time allocation and hovering time ratio to maximize the sum throughput. Numerical results show that the proposed EFH-EH scheme outperforms existing schemes, and the maximum available energy constraint limits the system performance when the transmit power is high.
Heavy metal sorption on soil minerals affected by the siderophore desferrioxamine B: the role of Fe(III) (hydr)oxides and dissolved Fe(III)

Phytoextraction of heavy metals from polluted soils has often been found to be limited by the bioavailability of the pollutants. Inorganic or organic ligands are occasionally used as complexing agents to enhance the mobility of the heavy metals. However, the opposite effect is also possible. We studied the influence of the hydroxamate siderophore desferrioxamine B (DFOB) on the sorption of Cu, Zn and Cd to clay minerals, with the emphasis on the role of dissolved Fe(III) and Fe(III) minerals. Depending on the surface charge of the minerals and on pH, sorption of heavy metals can be either enhanced or diminished. We show here that this effect of DFOB disappears if dissolved Fe(III) is added to suspensions of clay minerals in excess to DFOB. We found that the solid Fe(III) phases ferrihydrite and goethite did not impede the effect of DFOB on the sorption of heavy metal, however. Between pH 4 and 10, DFOB completely prevented Cu sorption on ferrihydrite. A strong mobilizing effect was also observed for Zn, but not for Cd. In presence of goethite, concentrations of dissolved Cu, Zn and Cd were enhanced only above approximately pH 5, 7 and 8, respectively. Below these pH values the binding of these metals to goethite was even stronger with than without DFOB. In the absence of heavy metals, DFOB‐promoted dissolution of ferrihydrite was much faster than that of goethite due to the larger surface area of ferrihydrite. In the alkaline pH range, where sorption of DFOB on the surfaces of the iron oxides was greater, dissolution of both minerals was reduced.
Characterizations of Global Transversal Exponential Stability

We study the relationship between the global exponential stability of an invariant manifold and the existence of a positive semidefinite Riemannian metric which is contracted by the flow. In particular, we investigate how the following properties are related to each other (in the global case): 1) A manifold is globally “transversally” exponentially stable; 2) the corresponding variational system admits the same property; 3) there exists a degenerate Riemannian metric which is contracted by the flow and can be used to construct a Lyapunov function. We show that the transverse contraction rate being larger than the expansion of the shadow on the manifold is a sufficient condition for the existence of such a Lyapunov function. An illustration of these tools is given in the context of global full-order observer design.
Crystal structure of 2-dimethylamino-1-methyl-1H-quino[4,3-e]-1,2,4-thiadiazine 4,4-dioxide, C13H14N4O2S

C13H14N4O2S, monoclinic, P121/c1 (no. 14), a = 7.6239(1) Å, b = 20.4013(2) Å, c = 8.4919(1) Å, + = 101.908(1)°, V = 1292.4 Å, Z = 4, Rgt(F) = 0.026, wRref(F ) = 0.074, T = 100 K.
GPS L1CA/BDS B1I Multipath Channel Measurements and Modeling for Dynamic Land Vehicle in Shanghai Dense Urban Area

Global navigation satellite system multipath channel modeling is important for signal simulation and error mitigation in urban scenarios. However, there have not been sufficient studies on channel statistical models for dynamic land vehicles in eastern Asian cities. This paper presents both MULTIPATH and non-line-of-sight (NLOS) channel models for GPS L1CA and BDS B1I signals. They are based on an extensive field dataset collected in the Shanghai-Lujiazui area. In addition, a method is developed to estimate multipath components and NLOS signal parameters in a dynamic channel environment. It is found that the Gamma function best fits the distribution of MULTIPATH channel delays while the exponential function is better suited for the distribution of NLOS channel delays. Both MULTIPATH and NLOS channel signals follow a linear decline average power-delay trend and a zero-mean Gaussian distribution power scattering model. The Doppler fading frequency distribution for MULTIPATH and NLOS channels can be modeled by the Gaussian function except for the MULTIPATH channel signal at the low velocity range (0∼3 km/h), where an absolute exponential distribution is a better fit. The lifetime distribution for MULTIPATH and NLOS channels is represented by the generalized Pareto distribution function. These findings offer insights into the GNSS signal models in urban propagation channels and are essential to the development of accurate urban navigation systems.