Miracle-dz/UniFAR-FTUs huggingface dataset:
Low-Dispersive Leaky-Wave Antenna Integrated in Groove Gap Waveguide Technology

In this paper, the use of a dispersive prism with a triangular shape is proposed to reduce the dispersive radiation nature of a leaky-wave antenna (LWA) in groove-gap waveguide technology. The operation of gap waveguide technology is based on the use of metallic pins that act as an artificial magnetic conductor, so the electromagnetic fields are confined and guided in the desired directions. To control a leaky-wave radiation of these confined fields is possible by tailoring the height of the pins, its periodicity, and the waveguide width. This radiation, as in any conventional LWA, is dispersive, leading to beam squint as the frequency is varied. Here, we mitigate this beam squint by using a prism made of dispersive pins and choosing appropriately their periodicity and height. With this prism, the leaky-wave radiation is focused into one single direction in a wide frequency band. This concept is demonstrated with a prototype designed to radiate at <inline-formula> <tex-math notation="LaTeX">$\varphi =41^\circ $ </tex-math></inline-formula> with a central frequency of 12 GHz and the high gain of 16.5 dBi. A 22% frequency bandwidth for the 3 dB realized gain at <inline-formula> <tex-math notation="LaTeX">$\varphi =41^\circ $ </tex-math></inline-formula> is achieved, and the main radiating direction, with half-power beamwidth of 5°, steers only ±0.5° from 11.4 to 13.4 GHz.
Previsão de séries temporais financeiras: modelo baseado em redes neurais artificiais

A projecao do comportamento das acoes e de fundamental importância para investidores obterem bons retornos financeiros no mercado acionario. A possibilidade de previsao de valores futuros de uma serie temporal financeira esta baseada em uma das principais premissas da escola de analise tecnica de acoes: precos futuros sao uma repeticao de precos passados. Este artigo propoe a criacao de um modelo previsor, baseado na combinacao de redes neurais artificiais, para prever a tendencia de movimentacao do preco de um selecionado de acoes. Dados historicos e de indicadores de analise tecnica foram utilizados como entrada para o sistema, que realiza a previsao de tendencia, de alta ou de baixa no preco, para um horizonte de um dia, o proximo dia da serie temporal. O sistema previsor final alcancou uma taxa de acerto, que variou entre 55% e 58% para as tres acoes analisadas. Ao realizar uma simulacao de investimento, observou-se que sua utilizacao possibilitaria a obtencao de lucros de 13% a 24%, no periodo de um ano. Considerando que as acoes analisadas tiveram quedas entre 15% e 30% nesse mesmo periodo, pode-se dizer que o sistema previsor apresentou um bom desempenho.
Optimal Reorganization of a Formation of Nonholonomic Agents Using Shortest Paths

In this work we address the problem of switching the shape of a formation of undistinguishable nonholonomic mobile robots. Each agent moves from the current to its target oriented position using the shortest path. We combine results from previous work on optimal formation switching when the agents are holonomic with results on the structure of the shortest path for nonholonomic agents.
Mechanical Instabilities of Gels

Although the study of gels undoubtedly takes its roots within the field of physicochemistry, the interest in gels has flourished and they have progressively become an important object in the study of the mechanics of polymeric materials and volumetric growth, raising some fascinating problems, some of them remaining unsolved. Because gels are multiphase objects, their study represents an important step in the understanding of the mechanics of complex soft matter as well as for the process of shape generation in biological bodies. The scope of this article is to review the understanding we have of the mechanical behavior of gels, with a strong focus on the development of instabilities in swelling gels.
3D-Printed Millimeter Wave Structures

Abstract : Abstract: 3D printing of styrene-butadiene-styrene(SBS) and styrene ethylene/butylene-styrene (SEBS) is usedto demonstrate the feasibility of 3D-printed millimeter wave(mmW) components. The dielectric properties of the twomaterials are characterized at mmW frequencies and showproperties comparable to rexolite. A bandpass filter, whichcan be inserted into WR-28 waveguide, is designed andmeasured, showing good agreement with simulation.Additionally, a dielectric lens is printed which improves theantenna gain of an open-ended WR-28 waveguide from 7 to8.5 dBi.
ULTRA-BRIGHT OPTICAL TRANSIENTS ARE LINKED WITH TYPE Ic SUPERNOVAE

Recent searches by unbiased, wide-field surveys have uncovered a group of extremely luminous optical transients. The initial discoveries of SN 2005ap by the Texas Supernova Search and SCP-06F6 in a deep Hubble pencil beam survey were followed by the Palomar Transient Factory confirmation of host redshifts for other similar transients. The transients share the common properties of high optical luminosities (peak magnitudes ∼−21 to −23), blue colors, and a lack of H or He spectral features. The physical mechanism that produces the luminosity is uncertain, with suggestions ranging from jet-driven explosion to pulsational pair instability. Here, we report the most detailed photometric and spectral coverage of an ultra-bright transient (SN 2010gx) detected in the Pan-STARRS 1 sky survey. In common with other transients in this family, early-time spectra show a blue continuum and prominent broad absorption lines of O ii. However, about 25 days after discovery, the spectra developed type Ic supernova features, showing the characteristic broad Fe ii and Si ii absorption lines. Detailed, post-maximum follow-up may show that all SN 2005ap and SCP-06F6 type transients are linked to supernovae Ic. This poses problems in understanding the physics of the explosions: there is no indication from late-time photometry that the luminosity is powered by 56Ni, the broad light curves suggest very large ejected masses, and the slow spectral evolution is quite different from typical Ic timescales. The nature of the progenitor stars and the origin of the luminosity are intriguing and open questions.
Score-Based Sentiment Analysis of Book Reviews in Hindi Language

Sentiment analysis has been performed in different languages and in various domains, such as movie reviews, product reviews and tourism reviews. However, not much work has been done in the area of books considering the high availability of book reviews on Hindi blogs and online forums. In this paper, a score-based sentiment mining system for Hindi language is discussed, which captures the sentiment behind the words of book review sentences. We conducted three experiments using scores from the Hindi-SentiWordNet (H-SWN), first using parts-of-speech tags of opinion words to extract their potential scores. Then, we focused on word-sense disambiguation (WSD) to increase the accuracy of system. Finally, the classification results were improved by handling morphological variations. The results were validated against human annotations achieving an overall accuracy of 86.3%. The work was extended further using Hindi Subjective Lexicon (HSL). We also developed an annotated corpus of book reviews in Hindi.
Constitutional Agenda-Setting Through Discretion in Rule Interpretation: Why the European Parliament Won at Amsterdam

It is a widely accepted that the 1999 Treaty of Amsterdam significantly increased the powers of the European Parliament (EP). The critical question, however, is why the European Union (EU) governments did this. I argue, contrary to existing explanations, that these changes came about because the EP was a ‘constitutional agenda-setter’. The rules in the EU Treaty, as established at Maastricht, were incomplete contracts, and the EU governments had imperfect information about the precise operation of the Treaty. As a result, the EP was able to re-interpret these rules to its advantage and threaten not to co-operate with the governments unless they accepted the EP's interpretations. The article shows how this process of discretion, interpretation and acceptance worked in the two main areas of EP power: in the legislative process (in the reform of the co-decision procedure), and in executive appointment (in the reform of the Commission investiture procedure). The article concludes that ‘agenda-setting through discretion in rule interpretation’ is a common story in the development of the powers of parliaments, both at the domestic and EU levels.
Fecal sludge management (FSM): analytical tools for assessing FSM in cities

This paper describes the results of a research study which aimed in part to develop a method for rapidly assessing fecal sludge management (FSM) in low- and middle-income cities. The method uses innovative tools to assess both the institutional context and the outcome in terms of the amount of fecal sludge safely managed. To assess FSM outcomes, a fecal sludge matrix and accompanying flow diagram was developed to illustrate the different pathways fecal sludge takes from containment in water closets, pits and tanks, through to treatment and reuse/disposal. This was supplemented by an FSM service delivery assessment (SDA) tool which measures the quality of the enabling environment, the level of service development and the level of commitment to service sustainability. The tools were developed through an iterative process of literature review, consultation and case studies. This paper considers previous work done on FSM, suggest reasons why it is often neglected in favour of sewerage, and highlights the importance of supporting the increasing focus on solving the FSM challenge. The tools are presented here as useful initial scoping instruments for use in advocacy around the need for a change in policy, funding or indeed a city’s overall approach to urban sanitation.
A COMPETITIVE IMMUNOSORBENT ASSAY FOR T H E

A competitive ELISA procedure for the detection of Escherichia coli heat stable enterotoxin (ST) with monoclonal antibody has been developed. This test is 10 times more sensitive than the suckling-mouse bioassay and it is specific, simple and cheap. A set of 882 strains of E. coli isolated from man were tested both by ST-ELISA and suckling-mouse bioassay, the latter serving as the reference method. Positive results in both tests were obtained with 152 strains. The remaining strains gave negative results in both tests, with the exception of two strains, known to be ST producers, that gave negative results in the suckling-mouse assay, but gave positive results by the ELISA method.
Long non-coding RNA LOC285194 functions as a tumor suppressor by targeting p53 in non-small cell lung cancer

Recently, LOC285194 has shown a potential tumor-suppressor function in several types of human cancers, but its function in non-small cell lung cancer (NSCLC) remains unknown. This study intended to investigate the biological role of LOC285194 and its clinical significance in NSCLC. LOC285194 was detected by qRT-PCR, and its correlation with clinicopathological features of NSCLC was analyzed. The expression of LOC285194 was knocked down or ectopically expressed in lung cancer cells (A549 and H1299) and tumor cell growth, migration and invasion in vitro were investigated. In addition, the interaction of LOC285194 and target proteins was assessed by RNA pulldown and RNA immunoprecipitation in vitro. The results revealed that the expression of LOC285194 was significantly lower in tumor tissues when compared with the corresponding non-tumor tissues (P<0.001). Its expression was correlated with the tumor size (P=0.027). Kaplan-Meier analysis revealed that patients with lower LOC285194 expression had worse disease-free survival and overall survival rates (P<0.05). RNA protein interaction analysis revealed that p53 was the direct binding target of LOC285194 in NSCLC. Bioinformatics analyses suggested that depletion of LOC285149 could affect its antitumor function through the KRAS/BRAF/SMEK pathway. Our findings indicated that LOC285194 was a novel non-coding prognostic indicator and contributed to tumor suppression by targeting p53 in NSCLC, suggesting that it may be a non-coding target for NSCLC gene therapy.
Crop Water Requirements in Cameroon’s Savanna Zones Under Climate Change Scenarios and Adaptation Needs, Crop Production Technologies

Rain-fed agriculture is practiced on approximately 80 percent of global agricultural land area (Wani et al. 2009). It accounts for about 70 percent of the global staple foods production (Cooper et al. 2009). This is the main mode of production favored by poor farmers in the developing world and other economically deprived societies (Wani et al. 2009). The contribution to global food supply from rain-fed agriculture is forecasted to decline from 65 percent at present to 48 percent in 2030 (Bruinsma 2003). The decline of precipitation forecast for some regions of the African savanna may affect agricultural production in different ways. During the already dry months, the decline of precipitation is likely to reduce the resilience of some plants (Vanacker et al. 2005). This is especially true for many ecosystems in Sub-Saharan Africa, particularly grass and shrub savannahs, which are shown to be highly sensitive to short-term availability of water due to climate variability (Vanacker et al. 2005). While the ranges of species may shift as a result of changing climate, this shift may probably not be in cohesive and intact units and are likely to become more fragmented (Channell and Lomolino 2000). This stimulates interest in understanding the effects of climate change on the potential for rain-fed agriculture for particular regions where this practice has important economic and social implications. While observed and measured data increasingly support predictions of a warmer world in the next 50 100 years, the impact of rising temperatures on rainfall distribution patterns in the semi-arid tropics of Africa remain far less certain (Cooper et al. 2009). African countries are particularly vulnerable to climate change because of their dependence on rain-fed agriculture, low economic power, low levels of human and physical capital, and poor infrastructure (Nelson 2009). The negative effects of climate change on agricultural production are especially pronounced in Sub-Saharan Africa because of the significant contribution of the agricultural sector to the GDP, export earnings, and employment (Fan et al. 2009). Cameroon, like many countries in sub-Saharan Africa has a high share of total poverty in the rural sector and a high share of GDP growth originating in agriculture (De Janvry 2009). Less than 1 percent of total agricultural land area in Cameroon is equipped for irrigation
Certifying Non-Classical Behavior for Negative Keldysh Quasi-Probabilities

Von Neumann measurements can be described naturally in terms of the Keldysh quasi-probability distribution (KQPD), and the imprecision and backaction exerted by the measurement apparatus. Here we introduce a classical (hidden-variable) model for von Neumann measurements. Under a few natural assumptions, we derive an experimentally accessible inequality which holds for the classical model and is violated in quantum theory if and only if the KQPD exhibits negative values. The inequality relies on the fact that measurement imprecision can be corrected for. Our results bestow an operational meaning upon the non-classical nature of negative quasi-probability distributions such as the Wigner function and the full counting statistics.
Comparison of Resistance Index and Peak Systolic Velocity of Fetal Middle Cerebral Artery between Normal and Fetuses with Mutated Beta-Thalassemia Gene

Background: Beta-thalassemia is the most common inherited single-gene disorder globally. In contrast to alpha-thalassemia, the role of resistance index (RI) and peak systolic velocity (PSV) of the middle cerebral artery (MCA) of the fetuses which are carriers for beta-thalassemia gene is not well understood. The objective of this study was to compare RI and PSV of the MCA in normal fetuses vs. fetuses with mutation of the beta-thalassemia gene. Methods: In this analytic study, 55 pregnant women with gestational age of 12 weeks and more were included consecutively. The pregnant women had history of giving birth to neonates with major betathalassemia or they or their husbands had minor beta-thalassemia. They underwent chorionic villus sampling (CVS). Twenty pregnant women without laboratory indices of beta-thalassemia were included as the control group. They underwent color Doppler ultrasound to measure RI and PSV of the fetal MCA. The data were analyzed using analysis of variance (ANOVA), Kruskal-Wallis test, chi-square test or the Fischer’s exact test. Results: PSV of the MCA was significantly higher in fetuses with beta-thalassemia gene compared to control group (P< 0.05). No significant difference existed regarding RI of the MCA between minor, major beta-thalassemia and control groups (P> 0.05). Conclusion: PSV of the MCA of fetuses with major beta-thalassemia was higher than in normal fetuses.
RATIONAL ARITHMETICAL FUNCTIONS OF ORDER (2,1) WITH RESPECT TO REGULAR CONVOLUTIONS

S.S. Pillai’s arithmetical function P (n) = ∑ m (mod n)(m,n) is an example of a rational arithmetical function of order (2, 1). We generalize P (n) with respect to Narkiewicz’s regular convolution and show that the generalized Pillai’s function is an example of a rational arithmetical function of order (2, 1) with respect to Narkiewicz’s regular convolution. We derive identities for rational arithmetical functions of order (2, 1) with respect to Narkiewicz’s regular convolution and therefore also for Pillai’s function and its generalization. 1 – Introduction S.S. Pillai’s [7] arithmetical function P (n) is defined by (1.1) P (n) = ∑ m (mod n) (m,n) , where (m,n) is the greatest common divisor of m and n. The structure of P is (1.2) P = I ∗ I ∗ e = I ∗ I ∗ μ = I ∗ φ , where ∗ is the Dirichlet convolution, I(n) = n, e(n) = 1 (n≥1), μ is the Möbius function, and φ is the Euler totient function. Equation (1.2) may be referred to as Cesàro’s formula (see [2, p. 127]). The arithmetical function P is an example of a rational arithmetical function of order (2, 1) in the terminology of Received : December 11, 1997. AMS Subject Classification: 11A25.
An Energy Efficient Clustering Protocol for Surveillance Sensor Networks

This paper proposes a distributed energy efficient clustering protocol for target surveillance in sensor networks (EECTS). The protocol selects cluster heads according to a hybrid of node's residual energy and distribution of its neighbors. In addition, for the sake of reducing the energy dissipation of the cluster head, a minimum spanning tree with root of the base station is constructed among the cluster heads. Then it sends the gathered data to its upstream node along the spanning tree. The chief task of surveillance sensor networks is to sensing the moving target. So an intra-cluster node schedule method named EECTS-1 that can senses the most part of the network and it's enhanced method EECTS-2 are introduced. The two methods can obtain the high continuous surveillance degree when the moving target enters into the network. EECTS produces a linear network lifetime in the number of nodes and keeps good continuous surveillance degree simultaneously. The simulation results show that with the same performance of surveillance the EECTS-1 achieves the same lifetime as that HEED obtains and outperforms DEEG with up to 35% improvement. The EECTS-2 outperforms HEED significantly with prolonging the network lifetime about 70%~80%. Therefore the EECTS is suitable for military target surveillance and has high reliability of the sensing information.
What controls who is where in freshwater fish communities the roles of biotic, abiotic, and spatial factors

We examine evidence for the structuring of fish communities from stream and lake systems and the roles of biotic, abiotic, and spatial factors in determining the species composition. Piscivory by fish is a dominant factor in both stream and lake systems whereas evidence for the importance of competition appears less convincing. Within small streams or lakes, the impact of predation may exclude other species, thereby leading to mutually exclusive distributions and strong differences in community composition. Within a geographic region, abiotic effects frequently dictate the relative importance of piscivory, thereby indirectly influencing the composition of prey species present. The spatial scale of studies influences our perceived importance of biotic versus abiotic factors, with small-scale studies indicating a greater importance of competition and large-scale studies emphasizing abiotic controls. The scale of the individual sites considered is critical because smaller systems have higher variability and .
Assessment of haematological, serum biochemical and histopathological effects of subchronic dietary fumonisin b 1 in rats

Context: Fumonisin B 1 (FB 1 ), a mycotoxin produced by Fusarium verticillioides and other Fusarium species that grow on maize worldwide , has been documented to cause various physiological responses in animals. Consumption of lesser amounts of fumonisins at levels below those that cause overt toxicity may exert haematological, serum biochemical and/or histopathological effects in animals. Objective: The effects of dietary FB 1 on haematology, serum biochemistry and histopathology were assessed in female Wistar rats in a short-term toxicity study. Materials and Methods: Thirty-nine mature female Wistar rats ( Rattus norvegicus ) weighing between 167.5 – 170.5 g were used in the study. The rats were assigned to diets containing 0.2, 10.0 and 20.0 mg FB 1 /kg constituting diets 1, 2 and 3, respectively. After 14 days of feeding, blood samples were obtained from four rats per treatment. The rats were sacrificed by cervical dislocation, eviscerated for organ collections and subsequently processed for histology. Results : Significant differences in feed consumption and body weight gains were not observed. The final live weight of the rats, however, seemed to decline with an increase in dietary FB 1 levels. Significant (P<0.05) alterations were observed in the haematological and serum biochemical parameters with increasing levels of dietary FB 1 . Diets containing different FB 1 concentrations, the decreased values of PCV, Hb, erythrocyte and monocyte counts could be attributed to the FB 1 effects on the blood-forming tissues in animals placed on diets 2 and 3 as compared to those fed diet 1. Also, histopathological changes were observed in the livers, kidneys, spleens and hearts of rats fed diets 2 and 3. Conclusion : This study revealed that the No-observable adverse effect level (NOAEL) of dietary FB 1 above which may cause significant physiological changes without overt toxicity for short-term toxicity study in female Wistar rats is <0.74 mg/kg bw per day . Keywords : Blood; Rat; Mycotoxin; Fusarium verticillioides ; Fumonisin B 1; Histopathology. DOI: http://dx.doi. org/10.3329/jbs.v18i0. 8779 JBS 2010; 18(0): 74-83
Optimal estimation of qubit mixed states with local measurements

We study the estimation problem of a general mixed qubit state with protocols based on local measurements. We obtain the asymptotic bound of the fidelity for these settings and show that they do not attain the optimal joint measurement bound. We present an explicit protocol that uses classical communication in a very efficient way and saturates the local bound. We also analyze the case of mixed states known to lie on an equatorial plane of the Bloch sphere.