Miracle-dz/UniFAR-FTUs huggingface dataset:
A BCU method for direct analysis of power system transient stability

A boundary of stability region based controlling unstable equilibrium point method (BCU method) for direct analysis of power system transient stability is presented. Features distinguishing the BCU method from the existing direct methods are that it consistently finds the exact controlling unstable equilibrium point (UEP) relative to a fault-on trajectory and that it has a sound theoretical basis. Moreover, the BCU method appears to be fast. This method is based on the relationship between the boundary of stability region of a power system and that of a reduced system. The BCU method finds the controlling UEP of the original system via a reduced system whose controlling UEP is easier and cheaper to compute. Effective numerical schemes to speed up the presented method are also proposed. This method has been tested on several power systems with very promising results. Simulation results on a 50 generator, 145 bus system are presented along with a comparison between the results obtained using the BCU method and another existing method. >
Marine Ecology Progress Series 497:1

The ongoing loss of predators is changing the composition of food webs, with largely un known consequences. In particular, the effects of multiple fish predators on food webs are difficult to predict due to the prevalence of omnivory and intra guild predation. At the same time, many ecosystems experience high nutrient loads that fuel food webs from the bottom up. To test the combined effects of both multiple predators and nutrient enrichment on food web composition, we created monocultures of perch, roach, and stickleback as well as mixed assemblages of all 3 species at 3 different density levels using an additive design, and induced nutrient en richment in half of the cages. The biomass of invertebrate herbivores and algae was measured. Stomach analyses of predators were used to detect prey switching. Herbivore biomass depended mainly on predator identity, while top-down effects on algae were mediated by predator density and nutrient en richment. Specifically, perch strongly reduced amphi pods and isopods, and roach mainly reduced gastropods but also isopods, while stickleback had weak overall effects on herbivores. These species-specific effects were attenuated in the mixed fish assemblages, probably due to prey switching. Algal growth strongly increased under high fish density and nutrient enrichment, but was not affected by predatorinduced changes in the herbivore composition. This study shows that identity effects from predators in isolation are attenuated in multiple predator assemblages, probably due to increasing interference among the predators. Algal biomass was enhanced by nutrient enrichment and high predator density, which affected algae probably through non-lethal effects, such as reduced activity of the herbivores. Diagram of food-web interactions (foreground) among fishes, herbivores and algae in the study system (background: brown algae and associated epiphytes and epifauna).
Profile and outcome of pregnancy with congenital heart diseases: a retrospective study from a South Indian tertiary care hospital

Availability and usage of better surgical and medical modalities in the management of congenital heart diseases in childhood has resulted in higher survival of those afflicted children into adult hood. This in turn is reflected in increased prevalence of adults with congenital heart diseases(ACHD). In advanced countries like USA there are now more adults with CHD than children with CHD. The incidence of congenital heart disease in pregnancy has increased over the last 30 years which is attributed to the improving results of surgical and catheter interventions, which lead to survival of this female into the reproductive age group.
Gender Differences in Saving Behavior and its Determinants: Patron from Pakistan

Pakistan is developing country and the areas selected from Punjab province are in initial stages of development. Saving behaviors of these areas are significantly different from other areas. Saving behaviors among genders of developing economy of Pakistan are different from developed economies. The fundamental aim of conducting this research is evaluating gender dissimilarities in saving behavior and determinants of saving behavior among males and females of Punjab, Pakistan. Sample size of this study includes males and females. Total 400 questionnaires were selected for study which includes 124 responses of females and 276 for males. Non-parametric test of chi-square for gender dissimilarities in their saving behaviors and linear regression for the determinants of saving behavior applied in study. Findings of study show that males and females have significantly different saving behaviors. Females save mostly and more for short term needs as compare males while males also save for medium and long term needs. Both males and females have significantly different impacts of determinants of saving on saving behavior except from education, work status, own home, risk tolerance level and medical expenses. The originality of this study is that it is first research work in Punjab, Pakistan on this topic especially in these four cities selected for analysis.
ICLE On principles and standards in ecological restoration

The Society for Ecological Restoration (SER) has long debated how to define best practices. We argue that a principles-first approach offers more flexibility for restoration practitioners than a standards-based approach, is consistent with the developmental stage of restoration, and functions more effectively at a global level. However, the solution is not as simple as arguing that one approach to professional practice is sufficient. Principles and standards can and do operate effectively together, but only if they are coordinated in a transparent and systematic way. Effective professional guidance results when standards anchored by principles function in a way that is contextual and evolving. Without that clear relation to principles, the tendency to promote performance standards may lead to a narrowing of restoration practice and reduction in the potential to resolve very difficult and diverse ecological and environmental challenges. We offer recommendations on how the evolving project of restoration policy by SER and other agencies and organizations can remain open and flexible.
Pension Funds’ Assets and Economic Growth

This paper empirically explores the impact of funding on economic growth. Since assets held in autonomous pension funds across the OECD countries have been rapidly increasing a question whether such a growth affects economic wealth remains under debate. In order to examine the relationship statistically, we use a sample of OECD countries over the period 2001-2011 and employ a modified Cobb-Douglas function. Part of the research is a repetition of the analysis done by Davis and Hu (2004). Having said that our dataset covers the years of the crisis, the model suggested by the authors is improved by an inclusion of two dummy variables. The results of static panel data models let us state that more funding leads to an increased economic growth. Even though these models fit the actual data very well, no dynamics are captured and therefore we rely on a dynamic specification instead. Once a lagged GDP per capita is included in the regression, we cannot empirically prove that a direct link between funding of pensions and economic growth exists and such an outcome is in line with the results of the study conducted by (Zandberg and Spierdijk, 2010). JEL classifications: C33, G23, J26, O16
Plane-and Space-Filling Trees by Means of Chain Coding

An algorithm for constructing fractal trees is presented. Fractal trees are represented by means of the notation called the unique tree descriptor [E. Bribiesca, A method for representing 3D tree objects using chain coding, J. Vis. Commun. Image R. 19 (2008) 184-198]. In this manner, we only have a one-dimensional representation by each fractal tree via a chain of base-five digit strings suitably combined by means of parentheses. The unique tree-descriptor notation is invariant under rotation and translation. Furthermore, using this descriptor it is possible to obtain the mirror image of any fractal tree with ease. In this paper, we focus on fractal plane-filling trees and space-filling trees.
Time-resolved magneto-Raman study of carrier dynamics in low Landau levels of graphene

We study the relaxation dynamics of the electron system in graphene flakes under Landau quantization regime using a novel approach of time-resolved Raman scattering. The non-resonant character of the experiment allows us to analyze the field dependence of the relaxation rate. Our results clearly evidence sharp increase in the relaxation rate upon the resonance between the energy of the Landau transition and the G-band and shed new light on relaxation mechanism of the Landau-quantized electrons in graphene beyond the previously studied Auger scattering.
Variability in proximate, mineral and vitamin contents of Carica papaya (L.) leaves, fruit pulp and seeds

The leaves and fruits of five Carica papaya morphotypes were harvested from trees in home gardens in Umu- ahia, Abia state, Nigeria. The morphotypes were based on fruit shape and pulp colour and are oblong red, oblong yellow, pear orange, round orange and round yellow. Seeds were extracted from the fruits and the pro ximate, mineral and vitamin analysis carried out on the leaves, fruit s and seeds. All the determinants were carried out in triplicates. Analysis of v a- riance was used to partition the variabili ty into the components due to genetic and non - environmental factors, genotypic (GCV), phenotypic (PCV) components of variation, estimates of broad sense heritability (h 2 B) and genetic advance (GA) was also done. The result showed that most of the variabil ity observed in the nutritional traits has more genetic than non - genetic basis and this indicates that a considerable selection program for improvement in these traits is possible in Carica papaya.
Decolorization and mineralization of brilliant golden yellow (BGY) by Fenton and photo-Fenton processes

The decolorization and mineralization of an azo dye, brilliant golden yellow (BGY, λmax 416 nm, ε = 7.81 x 10 3 Lmol -1 cm -1 ) by Fenton and photo-Fenton processes were investigated. The rate of decolorization is strongly dependent on the pH, initial concentrations of the dye, Fe(II) and H2O2. The effect of these parameters has been studied and the optimum operational conditions of these two methods were found. The optimum conditions were obtained at pH=3 for both processes. The photo-Fenton method proved to be the most efficient and occurs at a much higher oxidation rate than Fenton process. The results showed that about 99% of the dye decolorized within 20 and 5 min for Fenton and photo-Fenton processes, respectively. Characterization of the products after mineralization is discussed.
The Role of Self-Service Mobile Technologies in the Creation of Customer Travel Experiences

Through the use of self-service mobile devices, the traditional marketplace interaction is being replaced by a marketspace transaction, in which the foundation of customer-company interaction has changed. This article discusses the main actors of experiencial value creation through the physical world and virtual world in the context of transport service. The empirical data is collected from semi-structured interviews with 19 young urban transport commuters. The results show that self-service mobile devices enhance the information accessibility for passengers to create customized travel experiences through a closer interaction with other actors, including transport service providers, transport-related service providers, and other passengers. Moreover, the scope of travel experience was expanded beyond the traditional service encounter both temporally and spatially. This article is an exploration of the influence of self-service mobile devices in the changing roles of customers and companies. A key message is that executives must pay attention to how their companies create experience value in both the physical world and the virtual world, separately or in combination.
EXCHANGE VALUES AND SOCIAL POWER SUPPORTING THE CHOICE OF PARTNERS

espanolEn el presente trabajo adoptamos la teoria piagetiana de los intercambios sociales, donde una interaccion es un intercambio de servicios entre agentes, de tal manera que dichos agentes asignan valores subjetivos, cualitativos �denominados valores de intercambio� a las acciones y objetos que intercambian en la interaccion. Durante las interacciones los agentes presentan caracteristicas relativas al poder social. En este trabajo mostramos como los agentes consideran dichas caracteristicas en su razonamiento. Asimismo, el texto muestra como estas caracteristicas y los valores de intercambio pueden influir sobre la futura eleccion de asociados del agente para la formacion de grupo. EnglishIn this paper, we adopt Piaget�s theory of social exchanges, in which an interaction is an exchange of services between agents, such that agents assign subjective, qualitative values �called exchange values� to the actions and objects they exchange during interactions. The agents present characteristics related to social power during the interactions. In this paper, we show how these characteristics are considered in the agents� reasoning. This paper also shows how these characteristics and the exchange values can influence the agents� choice of future partners, in support of group formation.
Fiscal and Monetary Policies in a Monetary Union A Reduced Form Approach

In this paper we explicitly model strategic interaction between two independent national flscal authorities and a single central bank. We base the analysis on a dynamic general equilibrium model of a monetary union with monopolistic competition and staggered price setting. Closed analytical solutions for the policy instruments are computed for several strategic games. These results depend highly non-linear on parameters of the model. Thus, impulse response graphs to asymmetric shocks are depicted.
A note on fractional stochastic convergence

We show that a class of non-stationary stochastic processes exhibiting long-range dependence satisfies one definition of time series convergence proposed in the literature. We also show explicitly the relationship between two time series concepts convergence proposed in the literature. Furthermore, we assess income per capita convergence for a sample OECD of economies using time series based tests. When we allow income shocks to exhibit long-range dependence, generalizing previous specifications, we find ample evidence of pairwise convergence among OECD economies. This finding is contrary to the literature that uses unit roots and cointegration tests.
Traitement par anticorps anti-TNF ? (infliximab, Remicade®) des lésions anopérinéales de la maladie de Crohn

Malades et méthodes — Cinquante malades atteints de lésions anopérinéales sévères, symptomatiques et réfractaires (38 fistules, 29 ulcérations creusantes et superficielles), évoluant depuis 15 mois (médiane), ont été traités par 3 perfusions de 5 mg/kg de RemicadeT aux semaines 0 (S0), 2 (S2) et 6 (S6). L’efficacité du traitement a été jugée par le score fonctionnel d’Allan et un examen proctologique réalisé 2 mois (S8) et 6 mois (S24) après la première perfusion.
Determination of DNA Methylation Levels with CRED-RA Technique in the Genome of Sunflower Seedlings (Helianthus annuus L.) Subjected to Zinc Stress

Heavy metal pollution is a major environmental problem all over the world. It is known that high concentration of heavy metals in soils and waters cause genotoxicity and damage to most of the functional biomolecules. This event is a potentially dangerous for every living organism from plants to humans. The aim of this study was to determine the methylcytosine levels in sunflower (Helianthus annuus L.) genome and changes in methylation patterns under heavy metal of zinc stress. Sunflower seeds were treated with different concentrations of zinc (0, 20, 40, 80, 160, 320, 640, 1280ppm) for 3 weeks. The overview of the seedlings showed that the growth and development of seedlings were inhibited by 80ppm and following the increase of concentrations. The genomic DNA was extracted 3 weeks after zinc treatments. DNA band variations were revealed by random amplified polymorphic DNA (RAPD) analysis. And then, levels of methylcytosine in the genome were detected with the technique of coupled restriction enzyme digestion-random amplification (CRED-RA). CRED-RA is a significant technique which uses methylation-sensitive enzymes, HpaII and MspI for determining the methylation patterns. According to the RAPD and CRED-RA analysis, GTS rates adapted with RAPD profiles, when compared, the highest rate was 92.85% at 20ppm zinc concentration. The lowest rate was 83.33% at 640ppm zinc. Additionally, total methylation and full-methylation rates decreased until 160ppm zinc stress and then started to increase at 320ppm and more concentrations of zinc stressin comparison to the control groups. Similarly, the maximum percentage of non-methylation was detected 5.7% at 160ppm zinc stress. According to results of RAPD and CRED-RA analysis, very important polymorphism and methylation changes were observed in sunflower plants subjected to zinc stress.
Development of a system for X-ray analysis within the mining industry

Companies within the mining industry perform exploration drilling (prospecting) in order to find new mineral resources. The prospecting results in a lot of rock samples which are analyzed to discover what minerals they may contain. Today's analysis process involves high investments, high risks, and is very time inefficient. A start-up company called Minalyze is developing a product that will be capable of analyzing rock samples using X-ray.The product will be used at the drill site, and will involve much lower investments and very short analysis times.The purpose of this thesis is to design and develop Minalyze's first functional prototype called Minalyzer SCS. The aim is to implement different hardware components into a device that follows a concept which Minalyze has developed. Furthermore, a software architecture for controlling the hardware with a PLC will be developed, as well as a software architecture for controlling the PLC, from a PC, using LabView. During this thesis a partial vertical prototype was developed. The required hardware components required were identified, and a safety system was implemented. The PLC software, which consist of a series of programs and functions that control the actuators and performs data acquisition, was developed. Finally, for the software in LabView, a layered system design was used, together with an OPC system for exchanging data between the PLC and LabView. This thesis shows the importance of developing a prototype in an early stage of a product development process, for optimizing the product based on feedback received from investors,clients, and the development team. Prototyping also helps increasing the value of a start-up company. The result of the thesis is that Minalyze now owns two functional SW architectures, in LabView and the PLC, and functional hardware, ready to be implemented with a graphical user interface. When the company has completed the remaining drivers for the X-ray generation components (including a high-voltage generator and a X-ray detector), and developed the graphical user interface, the prototype will be ready to be shown for investors and customers. It will greatly aid Minalyze in the development of their final product.
A light and period study of SV Camelopardalis

New BVR light curves and times of minimum light for the short period RS CVn system SV Cam were analysed to derive the physical parameters of the system and the parameters of the third body orbit. The light curves obtained at the TUBITAK National Observatory during two nights in 2000 show considerable asymmetry and night-to-night variations. The analysis of the light curves is made using Djurasevic's inverse problem method. The Roche model with spotted areas on the hotter primary component yields a good fit to observations. The extensive series of published photoelectric minima times indicate that the eclipsing pair orbits around the common mass center of the triple system with a period of 41.32 yr.
Multitracer Field Fluorometry: Accounting for Temperature and Turbidity Variability During Stream Tracer Tests

The use of multitracer field fluorometry is increasing in the hydrological sciences. However, obtaining high‐quality fluorescence measurements is challenging given the variability in environmental conditions within stream ecosystems. Here, we conducted a series of stream tracer tests to examine the degree to which multitracer field fluorometry produces reliable estimates of tracer concentrations under realistic field conditions. Using frequently applied examples of conservative (Uranine) and reactive (Resazurin‐Resorufin) fluorescent tracers, we show that in situ measurements of tracer breakthrough curves can deviate markedly from corresponding samples analyzed under laboratory conditions. To investigate the effects of key environmental variables on fluorescence measurements, we characterized the response of field fluorometer measurements to changes in temperature, turbidity, and tracer concentration. Results showed pronounced negative log‐linear effects of temperature on fluorescence measurements for all tracers, with stronger effects observed typically at lower tracer concentrations. We also observed linear effects of turbidity on fluorescence measurements that varied predictably with tracer concentration. Based on our findings, we present methods to correct field fluorometer measurements for variation in these parameters. Our results show how changing environmental conditions can introduce substantial uncertainties in the analysis of fluorescent tracer breakthrough curves, and highlight the importance of accounting for these changes to prevent incorrect inferences being drawn regarding the physical and biogeochemical processes underpinning observed patterns.
Morphology, phylogeny and taxonomy of South American bothropoid pitvipers (Serpentes, Viperidae)

Carrasco, P.A. , Mattoni, C.I. , Leynaud, G.C. & Scrocchi, G.J. (2012). Morphology, phylogeny and taxonomy of South American bothropoid pitvipers (Serpentes, Viperidae). —Zoologica Scripta, 41, 109–124.
'To Have and Have Not': Migration, Remittances, Poverty and Inequality in Algeria

This article analyses the distributional impact of remittances across two regions of Algerian emigration (Nedroma and Idjeur) using an original survey we conducted of 1,200 households in 2011. Remittances and especially the role played by foreign pensions decrease the Gini index by nearly 4 % for the two Algerian regions, with the effect in Idjeur being twice as large as Nedroma. At the same time, they help reduce poverty by nearly 13 percentage points. Remittances have a strong positive impact on very poor families in Idjeur but much less in Nedroma, where poor families suffer from a "double loss" due to the absence of their migrants and the fact that the latter do not send money home.