Miracle-dz/UniFAR-FTUs huggingface dataset:
Bandwidth Improvements Using Ground Slots for Compact UWB Microstrip-fed Antennas

The paper studies the method of using a ground slot for bandwidth improvement of compact ultra-wide band (UWB) antennas with microstrip line feed. Slots of difierent shapes such as triangular, rectangular, partially circular and hexagonal, placed on the ground plane under the feed line of the radiator are studied for impedance matching. The efiects of the slots on the performances of the antennas, in terms of impedance bandwidth, radiation pattern, gain, and e-ciency, are studied. Results of simulation tests show that a ground slot with proper dimensions placed under the feed line can improve the impedance matching and hence increase the bandwidth without afiecting much the performance of the antenna. Results of studies also show that, by using a hexagonal slot on the ground plane under the feed line, a patch antenna with a compact size of 35mm £ 23mm can achieve a bandwidth of 3.1{16.3GHz for S11 < i10dB. Moreover, it has a stable omnidirectional radiation pattern across the whole bandwidth and achieves an average gain of 2.8dBi and an average e-ciency of about 88% across the UWB.
Rockburst concept and mechanism

: This chapter presents a variety of rockbursts in ﬁ ve sections: (i) the rockburst introduction, (ii) classi ﬁ cation according to triggering mechanisms and modeling approaches, (iii) the study of the above classi ﬁ cations, (iv) the criterion of rockburst, and (v) a brief summary of this chapter. Innovative work has been done in developing the ʻ strainburst testing machine ʼ and ʻ impact-induced rockburst testing machine ʼ that create a new era in which varied rockburst phenomena can be produced in the laboratory. New concepts are proposed regarding the stress paths for arti ﬁ cially produced rockbursts, the strain-burst criteria, and impact-induced rockburst criteria that take into account both the static and dynamic stress states analogous to that at excavation boundaries. This research provides us with a basis for rockburst prediction and control in the ﬁ eld.
NORMAL FORMS FOR CR SINGULAR CODIMENSION TWO LEVI-FLAT SUBMANIFOLDS

Real-analytic Levi-flat codimension two CR singular submanifolds are a natural generalization to C m , m > 2, of Bishop surfaces in C 2 . Such submanifolds for example arise as zero sets of mixed-holomorphic equations with one variable anti- holomorphic. We classify the codimension two Levi-flat CR singular quadrics, and we notice that new types of submanifolds arise in dimension 3 or greater. In fact, the nondegenerate submanifolds, i.e. higher order purturbations of zm = ¯1z2 + ¯ z 2 1 , have no analogue in dimension 2. We prove that the Levi-foliation extends through the singu- larity in the real-analytic nondegenerate case. Furthermore, we prove that the quadric is a (convergent) normal form for a natural large class of such submanifolds, and we compute its automorphism group. In general, we find a formal normal form in C 3 in the nondegenerate case that shows infinitely many formal invariants.
HH-FRBC:HalvingHierarchical FuzzyRule-Based Classifier

The main objective of this article is to improve the accuracy of Mamdani fuzzy rule-based classification systems. Although these systems tend to perform successfully with respect to interpretability, they suffer from rigid pattern space partitioning. Therefore, a new hierarchical fuzzy rule-based classifier based on binary-tree decomposition is proposed here to develop a more flexible pattern space partitioning. The decomposition process is controlled by fuzzy entropy of each partition. Final rule sets obtained by this proposed method are pruned to overcome the over fitting problem. The performance of this method is compared with some fuzzy and non-fuzzy classification methods on a set of bench mark classification tasks. The experimental results indicate a good performance of the proposed algorithm. c © 2014 JComSec. All rights reserved.
CHEMICAL REPELLENTS FOR REDUCING CROP DAMAGE BY BLACKBIRDS

Chemical rrpcllrnts arc intcnded to prevrnt birds from fcrding on a particular food (the crop) at a given location. To be considered effective, a chemical repellent must producc 1 of 2 rcsponses (1) dcpredating birds remain but feed on an alterna~ tivc nonrmpfmdrtcm or (2) 6qrcdatitrg birds lcavc and go chewhem to feed. T k j c e r e h im a safe, costiffeeitw chefflical repellent has spanned decadrs. During the 1950s. IYGOs, and 199Os, repellent screening programs, using captive red~winged blackbirds (Aaelaius Dboeniceus). brown~headed cawbirds i.Molorhrus ater). and Eurooean starlings (Sturnus vulaaris), . " identified numerous potenrillly useful compounds. Despite promising rcsults from trixls with captivc birds and verification in subsequent field trials, formal registration of bird rcpellenr chemicals for crop protection has remained elusive. In this paper. we present recent results from cage and field trials of various candidatc colnpounds and discuss the potential utility of chemical repellrnts within integrated blackbird management strategies.
Optimization of e-Learning Model Using Fuzzy Genetic Algorithm

E-learning model is examined of three major dimensions. And each dimension has a range of indicators that is effective in optimization and modeling, in many optimization problems in the modeling, target function or constraints may change over time that as a result optimization of these problems can also be changed. If any of these undetermined events be considered in the optimization process, this is called optimization problem. Many problems in the real-world are dynamic and uncertain and solve them as static are not appropriate. In this paper, for the first time a fuzzy genetic algorithm for optimization and modeling e-learning is presented. Method is that we create a fuzzy model at first, and then we perform optimization by genetic. The results of proposed algorithm on mobile peaks benchmark that are already best-known benchmark for evaluating in the modeling are evaluated and the results of several valid algorithms have been compared. The results indicate the high efficiency of the proposed algorithm in comparison with other algorithms.
Chemical and Biological Assessment of Angelica Roots from Different Cultivated Regions in a Chinese Herbal Decoction Danggui

Roots of Angelica sinensis (Danggui) have been used in promoting blood circulation as herbal medicine for over 2000 years in China. Another species ofAngelica roots calledA. gigas is being used inKorea. To reveal the efficiency of differentAngelica roots, the chemical and biological properties ofAngelica roots from different cultivated regions were compared. Roots ofA. sinensis contained higher levels of ferulic acid, Z-ligustilide, and senkyunolide A, while high amounts of butylphthalide and Z-butylenephthalide were found in A. gigas roots.The extracts deriving from A. gigas roots showed better effects in osteogenic and estrogenic properties than that of A. sinensis from China. However, this difference was markedly reduced when the Angelica roots were being prepared in a Chinese herbal decoction together with Astragali Radix as Danggui Buxue Tang. In contrast, the herbal decoction prepared from A. sinensis roots showed better responses in cell cultures. In addition, the extracts of A. gigas roots showed strong cell toxicity both as single herb and as Danggui Buxue Tang. This result revealed the distinct properties of Angelica roots from China and Korea suggesting the specific usage of herb in preparing a unique herbal decoction.
Cellular Electrophysiological Changes in Rats with Heart Failure and Ventricular Arrhythmias - in Vitro-in Vivo Correlations

Aim of the study: During heart failure (HF), mechanisms of ventricular arrhythmias are poorly understood. The clinical relevance of elementary mechanisms suggested by in vitro experiments has to be questioned, since in vivo correlations are often lacking. We compared action potential (AP) characteristics, occurrence of automaticity, and triggered activity with in vivo arrhythmic, morphologic, and haemodynamic data in post myocardial infarction (PMI) rats. Methods and results: Telemetric ECG, morphologic, and haemodynamic data were obtained from 16 live PMI and 13 sham rats, at one and five months after surgery. Action potentials (AP) were studied on the papillary muscle in different solutions, and at different pacing rates. Spontaneous ventricular premature beats (VPBs) were frequent in PMI and were bradycardia-dependent. Abnormal automaticity was the most common in vitro observed mechanism. Time after infarction was related to EAD/DAD in vitro distribution but not with in vivo data. HF induced major alterations of filling pressures and of AP characteristics. AP duration was strongly correlated with the size of infarction but not with the arrhythmic density, in contrast with AP amplitude, resting potential, and Vmax. Conclusion: In PMI rats, abnormal automaticity was the major mechanism of in vitro recorded arrhythmias, consistently with the bradycardiadependence of in vivo observed VPBs. Delay after infarction influenced only EAD/DAD proportion. In this model, AP prolongation could be a simple marker of HF not involved in arrhythmogenic mechanisms. Heterogeneity of the pathobiology of arrhythmias in HF warrants further in vitro-in vivo correlations. J Clin Basic Cardiol 2005; 8: 23–8.
Arm-length dependence of stress relaxation in star polymer melts

We apply our recent microscopic theory of stress relaxation in star polymer melts to dynamic rheology data of Fetters et al. on melts of monodisperse four-arm polyisoprene stars, with arm molecular weights in the range 17 000 to 105 000 (M/Me from 3.4 to 21.0, with Me = 5000). The agreement between theory and experiment is excellent for all frequencies and arm lengths, with physically reasonable values of plateau modulus and friction factor and no other adjustable parameters. These data obey time−temperature superposition, with no evidence for anomalous arm-length dependence of activation energies as seen in polyethylene-branched polymers.
A Polymerase Tautomeric Model for Targeted Substitution Mutations Formation During Error Prone and SOS Replication of Double Stranded DNA, Containing cis-syn Cyclobutane Cytosine Dimers

A polymerase-tautomer model for ultraviolet mutagenesis is described that is based on formation of rare tautomeric bases in cis-syn cyclobutane pyrimidine dimers. The model is based on that fact that during error-prone and SOS synthesis the induced DNA polymerase inserts canonical bases opposite the dimers in a complementary way in contrast to un complementary one in the conventional models. There are same types of potential mutagens damages in cis-syn cyclobutane cytosine dimers. They correspond to 7 basic types of rare tautomeric conformations of cytosine. Error-prone and SOS replication of double-stranded DNA having cis-syn cyclobutane cytosine dimers, with one or both bases in 4 basic types of rare tautomeric conformations of cytosine (the dimers CC 1 *, CC 2 *, CC 5 * and CC 6 *, with the *indicating a rare tautomeric base and subscript referring to the particular conformation), results only in targeted substitution mutations. The structural analysis indicates that three types of cis-syn cyclobutane cytosine dimer containing a single tautomeric base (the dimers CC 1 *, CC 2 *, CC 2 * ′) can cause G: C→A: T transition or G: C→C: G homologous transfusion. Another two dimers (CC 5 * and CC 6 * ′′) can result only in G: C→Т : A transverse. The dimer CC 6 * can cause G: C→A:T transition, G:C→C:G homologous transverse or G:C→T:A transfusion. If both bases in the dimer are in a rare tautomeric form, then tandem mutations can be formed. The 90 substitution mutations have been interpreted from the point of view of polymerase-tautomer model of UV mutagenesis. polymerase-tautomericmodel able
GENETIC DIVERSITY AND GENETIC STRUCTURE OF AN ENDANGERED SPECIES, ERIOCAULON NUDICUSPE, GROWING IN ARTIFICAL DISTURBING HABITATS

Eriocaulon nudicuspe (Eriocauloaceae) is an endangered species in Japan. Habitats of the species are lost by city development. So many conservation areas are established in Aichi Prefecture, and protection activities are done by many natural protecting groups, and the extinction rate in recent years is being decelerated. But many protecting groups often transplanted from some other places, and genetic disturbance was a problem. We sampled 12 populations of the species from nature reserved areas, and studied them for allelic variation at 17 enzyme loci. There was no significant correlation between the real distance of conserved areas and genetic distances, suggesting that the gene disturbances occurred in these areas especially in frequently managed areas. On the other hand, the degree of the genetic differentiation at strictly conserved area where conservation management is done only once a year was high and there was no evidence about genetic disturbances. There was a possibility peculiar genetic disappearance of each habitat for genetic disturbance, and the necessity with which a guideline of protection activity is made was indicated.
Quantum quenches to the attractive one-dimensional Bose gas: exact results

We study quantum quenches to the one-dimensional Bose gas with attractive interactions in the case when the initial state is an ideal one-dimensional Bose condensate. We focus on properties of the stationary state reached at late times after the quench. This displays a finite density of multi-particle bound states, whose rapidity distribution is determined exactly by means of the quench action method. We discuss the relevance of the multi-particle bound states for the physical properties of the system, computing in particular the stationary value of the local pair correlation function $g_2$.
Maximizing the number of Pasch configurations in a Steiner triple system

Let $P(v)$ denote the maximum number of Pasch configurations in any Steiner triple system on $v$ points. It is known that $P(v)\le M(v)=v(v-1)(v-3)/24$, with equality if and only if $v$ is of the form $2^n-1$. It is also known that $\displaystyle \limsup_{v\to\infty \atop v\ne 2^n-1} \frac{P(v)}{M(v)}=1$. We give a new proof of this result and improved lower bounds on $P(v)$ for certain values of $v$.
Broadband Tariffs in Latin America: Benchmarking and Analysis

We analyze tariffs for fixed broadband services in Latin America and benchmark against tariffs in the OECD. We also develop a new broadband development indicator (the Broadband Performance Index) that compares actual penetration rates with those predicted by our regression model. The results shows that broadband services in Latin America are generally expensive and of poor quality when benchmarked against OCED countries, and that Latin American countries are underperforming in broadband development after wealth, education and demographics factors are accounted for. We also provide price elasticity estimators for broadband demand in Latin America. The results reveal that an average price reduction of 10% would result in an increase of almost 19% in the penetration rate, equivalent to 4.7 million additional broadband connections. Finally we estimate the affordability of broadband services for households in a sample of countries in the region. The results reveal that sharp price reductions would be needed to achieve household penetration rates comparable to the OECD, and that public access initiatives will still be needed to provide services for the lowest-income households.
The relationship between a black economic empowerment score and shareholder returns in Johannesburg Stock Exchange-listed companies

One of the major initiatives to redress the social and economic injustices of apartheid in South Africa is the black economic empowerment (BEE) legislative framework currently enacted by government. One of the core tenets of BEE is to facilitate the inclusion of previously disadvantaged blacks as shareholders of companies, thereby providing them with a stake in the economy. Since these new shareholders lack the means to acquire shares, existing shareholders devise various mechanisms which, in essence, bestow scrip on the newcomers, and simultaneously open up opportunities for BEE-compliant companies to benefit. Studies into the impact of BEE on shareholders have delivered conflicting findings, with some showing significant benefits to existing shareholders while others contradict this. The present study examines the association between a company’s BEE score/rating and shareholder returns, using an event study methodology and a buy-and-hold portfolio analysis to understand both the short- and long-term effects of a company’s BEE score. The authors observed a positive association between a change in BEE score and abnormal returns in the short term. In the longer term, portfolios which were comprised of companies with better BEE scores generated lower returns than those with worse BEE scores – a surprising phenomenon which may be attributable to the high cost of BEE compliance. These results add weight to the existing body of literature which questions the efficacy of BEE. Keywords: abnormal returns, BEE, black economic empowerment, event study, buy and hold
Knowledge sharing capability, absorptive capacity, and innovation capability: an empirical study of Indonesia's information and communication technology industry

This research investigates the relationships between knowledge sharing capability, absorptive capacity, and innovation capability. This research proposed and tested three hypotheses. The data was collected by conducting a survey on 114 companies of Indonesia’s information and communication technology industry, including a telecommunication service provider, a support service provider,network vendors, and consumer devices vendors. This study finds that absorptive capacity is the intervening factor between knowledge sharing capability and innovation capability. It also shows that potential absorptive capacity has a positive influence on realized absorptive capacity, and realized absorptive capacity has a positive influence on product and process innovation capability.
PREVALENCE OF EXCESS BODY WEIGHT AND ASSOCIATED RISK FACTORS AMONG ADULTS IN YAOUNDE, CAMEROON.

Background: Excess body weight is a very serious global epidemic. It constitutes a major public health issue in the world on developed, emerging and under-developed countries. Obesity and overweight trends are especially alarming in adults. If correctives measures are not put in, this epidemic will considerably increase morbidity at a global level. Objective: In Cameroon, very few data on the excess body weight are available hence this study aim to evaluate the importance of obesity, overweight and the factors that are associated with it among adult population in the city of Yaounde. Methods: The cross-sectional, descriptive and analytic study was conducted on 244 adults recruited from January to June 2011 in the capital city of Yaounde. Anthropometric and arterial blood pressure measurements were taken and well-structured questionnaire was used to collect socio demographic characteristics, food habits and practice of physical activity. The data collected was entered and analysed using Epi info software. Multivariate logistic regression analysis was used to identify factors associated with excess body weight in Yaounde’s population. Results: Out of the 244 subjects included in the analysis, 112 (45.9%) subjects were male and 132 (54.1%) subjects were female with sex ratio male/ female of 0.85. The mean age was 43 years, the prevalence of the obesity was 32.4% (IC95%: 26.5% 38.6%). The prevalence of overweight was 43% with an overall prevalence of excess body weight 75.4% (IC 95%: 69.5% 80.7%). Conclusion: The prevalence of excess body weight was high in the studied population of WORLD JOURNAL OF PHARMACY AND PHARMACEUTICAL SCIENCES S SJIF Impact Factor 6.647 Volume 6, Issue 6, 238-252 Research Article ISSN 2278 – 4357 *Corresponding Author Marianne Patricia Ntsama
Trends in Velocity and Policy Expectations

U.S. velocity of base money exhibits three distinct trends since 1950. After rising steadily for 30 years, it flattens out in the 1980s, and falls substantially in the 1990s. This paper explores whether the observed secular movements in velocity can be accounted for exclusively by endogenous responses to changing expectations about monetary and fiscal policy. We use a model with two key features: a substitute for money in transactions and an array of assets that includes money, nominal bonds, and physical capital. The model maps policy expectations into portfolio decisions, making equilibrium velocity a function of expected future money growth, tax rates, and government spending. When expectations are estimated using Bayesian updating, simulated velocity matches the trends in actual velocity surprisingly well.
Feedback Linearization Control of Wind Turbine Based on PMSG

Abstract — This paper presents a feedback linearization control for a wind turbine based on a Permanent Magnet Synchronous Generator (PMSG). Considering the nonlinear relationship between the generator speed and generator currents, the generator side converter is designed by using a feedback linearization to control electromagnetic torque and generator speed. Standard vector techniques are used to control the Grid side converter. The validity of this control algorithm has been verified by simulation of a small scale wind turbine. Keywords — Wind Turbine, PMSG, Generator Side Converter, Feedback linearization and Grid Side Converter. I. I NTRODUCTION Wind energy is currently considered to be one of the most efficient and easily available resources that are able to provide a sustainable supply of energy to the world development. This status stems from its abundance, inexhaustibility, increasingly competitive cost, and environmental safety. However, its integration as a conventional production cycle is still difficult due to its dependence on climate conditions. Wind Energy Conversion System (WECS) is made up of a wind turbine, a pitch angle control, a drive train, a generator and power converters. There are various kinds of generators used in WECS such as induction generator (IG), doubly fed induction generator (DFIG) and PMSG. PMSGs are emerging as the most-preferred technology of use. In contrast to their fixed-speed counterparts, the variable speed generators allows for operating wind turbines at the optimum tip-speed ratio and hence at the optimum power efficient for a wide wind speed range. However, the variable-speed directly-driven multi-pole permanent magnet synchronous generator (PMSG) wind architecture is chosen for this purpose of this research. In fact, it offers a better performance due to its higher efficiency and less-needed maintenance operations because it does not have a rotor current. Moreover, PMSG can be used without a gearbox, which implies a reduction of the weight of the nacelle and reduction of costs. Optimum wind energy extraction is achieved through the Wind Turbine Generator (WTG) running invariable velocity speeds achieving, as such, higher energy preservation as well as a stress reduction