Miracle-dz/UniFAR-FTUs huggingface dataset:
Coherent plane-wave compounding for very high frame rate ultrasonography and transient elastography

The emergence of ultrafast frame rates in ultrasonic imaging has been recently made possible by the development of new imaging modalities such as transient elastography. Data acquisition rates reaching more than thousands of images per second enable the real-time visualization of shear mechanical waves propagating in biological tissues, which convey information about local viscoelastic properties of tissues. The first proposed approach for reaching such ultrafast frame rates consists of transmitting plane waves into the medium. However, because the beamforming process is then restricted to the receive mode, the echographic images obtained in the ultrafast mode suffer from a low quality in terms of resolution and contrast and affect the robustness of the transient elastography mode. It is here proposed to improve the beamforming process by using a coherent recombination of compounded plane-wave transmissions to recover high-quality echographic images without degrading the high frame rate capabilities. A theoretical model is derived for the comparison between the proposed method and the conventional B-mode imaging in terms of contrast, signal-to-noise ratio, and resolution. Our model predicts that a significantly smaller number of insonifications, 10 times lower, is sufficient to reach an image quality comparable to conventional B-mode. Theoretical predictions are confirmed by in vitro experiments performed in tissue-mimicking phantoms. Such results raise the appeal of coherent compounds for use with standard imaging modes such as B-mode or color flow. Moreover, in the context of transient elastography, ultrafast frame rates can be preserved while increasing the image quality compared with flat insonifications. Improvements on the transient elastography mode are presented and discussed.
A Vision-Based Infant Monitoring System Using PT IP Camera

This study proposes a vision-based infant monitoring system. The input videos are obtained from one PT(Pan Tilt) IP(Internet Protocol) camera set on a high point in a room. The proposed system consists of three major stages: tracking object (infant) initialization, infant tracking, and PT IP camera control. First, a codebook background subtraction algorithm is applied to extract the infant on the input frames and to construct a tracking feature model initially. Once the infant has been extracted, the system then tracks the infant by using the tracking feature model. Since the infants are not rigid objects, the tracking feature model should be updated automatically when the infants change their postures or positions. Moreover, the system also predicts infant actions and controls the PT IP camera movement to avoid the infant crawling or walking out of the monitoring scope. Finally, a retracking mechanism is used to retrack the infant to avoid mistracking. These strategies help the monitoring system works well. We hope the proposed method can be embedded into some healthcare systems in the future.
Commutation Torque Ripple Reduction with Fuzzy-PID Control in Brushless Direct Current Machine

Torque ripple seriously affects the performance of brushless DC machine (BLDCM). Analyzed the principle of current hysteresis controller reducing non-commutation phase current which made BLDCM system become more hysteretic, the precise model of BLDCM is difficult to obtain. The fuzzy-PID control based on current hysteresis controller was proposed to diminish torque ripple and overcome the shortcomings of BLDCM system. The model of BLDCM control system with fuzzy-PID control was established and simulated. Compared with current hysteresis controller results, the torque ripple reduced from 160% to 35%. The comparison of experimental results verify the effectiveness of the fuzzy-PID controller which can reduce the amplitude of torque ripple.
Identity-Based Encryption with Cloud Revocation Authority and Its Applications

Identity-based encryption (IBE) is a public key cryptosystem and eliminates the demands of public key infrastructure (PKI) and certificate administration in conventional public key settings. Due to the absence of PKI, the revocation problem is a critical issue in IBE settings. Several revocable IBE schemes have been proposed regarding this issue. Quite recently, by embedding an outsourcing computation technique into IBE, Li et al. proposed a revocable IBE scheme with a key-update cloud service provider (KU-CSP). However, their scheme has two shortcomings. One is that the computation and communication costs are higher than previous revocable IBE schemes. The other shortcoming is lack of scalability in the sense that the KU-CSP must keep a secret value for each user. In the article, we propose a new revocable IBE scheme with a cloud revocation authority (CRA) to solve the two shortcomings, namely, the performance is significantly improved and the CRA holds only a system secret for all the users. For security analysis, we demonstrate that the proposed scheme is semantically secure under the decisional bilinear Diffie-Hellman (DBDH) assumption. Finally, we extend the proposed revocable IBE scheme to present a CRA-aided authentication scheme with period-limited privileges for managing a large number of various cloud services.
MRT letter: Experimental verification of vectorial theory to determine field at the geometrical focus of a cylindrical lens

We provide experimental evidence supporting the vectorial theory for determining electric field at and near the geometrical focus of a cylindrical lens. This theory provides precise distribution of field and its polarization effects. Experimental results show a close match (≈ 95% using χ2‐test) with the simulation results (obtained using vectorial theory). Light‐sheet generated both at low and high NA cylindrical lens shows the importance of vectorial theory for further development of light‐sheet techniques. Potential applications are in planar imaging systems (such as, SPIM, IML‐SPIM, imaging cytometry) and spectroscopy. Microsc. Res. Tech. 77:105–109, 2014. © 2014 Wiley Periodicals, Inc.
Delayed neuronal preconditioning by NS1619 is independent of calcium activated potassium channels

1,3‐Dihydro‐1‐[2‐hydroxy‐5‐(trifluoromethyl)phenyl]‐5‐(trifluoromethyl)‐2H‐benzimidazol‐2‐one (NS1619), a potent activator of the large conductance Ca2+ activated potassium (BKCa) channel, has been demonstrated to induce preconditioning (PC) in the heart. The aim of our study was to test the delayed PC effect of NS1619 in rat cortical neuronal cultures against oxygen‐glucose deprivation, H2O2, or glutamate excitotoxicity. We also investigated its actions on reactive oxygen species (ROS) generation, and on mitochondrial and plasma membrane potentials. Furthermore, we tested the activation of the phosphoinositide 3‐kinase (PI3K) signaling pathway, and the effect of NS1619 on caspase‐3/7. NS1619 dose‐dependently protected the cells against the toxic insults, and the protection was completely blocked by a superoxide dismutase mimetic and a PI3K antagonist, but not by BKCa channel inhibitors. Application of NS1619 increased ROS generation, depolarized isolated mitochondria, hyperpolarized the neuronal cell membrane, and activated the PI3K signaling cascade. However, only the effect on the cell membrane potential was antagonized by BKCa channel blockers. NS1619 inhibited the activation of capase‐3/7. In summary, NS1619 is a potent inducer of delayed neuronal PC. However, the neuroprotective effect seems to be independent of cell membrane and mitochondrial BKCa channels. Rather it is the consequence of ROS generation, activation of the PI3K pathway, and inhibition of caspase activation.
Optimal operating strategy for distribution networks with PV and BESS considering flexible energy storage

Nowadays, more and more distributed photovoltaic (PV) and battery energy storage system (BESS) are integrated into distribution networks, which brings a series of challenges to secure, stable, and economic operation of distribution networks. As BESS plays an important role in distribution networks operation, optimizing the operation requires consideration of life-time characteristic and parameter optimization of BESS. This paper proposes a day-ahead two-level operating model for distribution networks with PV and BESS. Dynamic active-reactive optimal power flow (DAROPF) is adopted to cover multiple time periods. The influences of BESS parameters are analyzed considering the uncertainty of solar resource. The solution provides an optimal operating strategy which ensures the flexibility. A case study is used to illustrate the strategy and the results show that the operation can be improved and lifetime of BESS can be increased using the proposed strategy.
Matching Geometry for Long-term Monocular Camera Localization

Localizing a camera with respect to a given map is a fundamental problem in vision-based navigation. Realworld applications require methods that are capable of longterm operation because recordings of available maps often date back considerably compared to the time of localization. Unfortunately, the photometric appearance of the environment can change tremendously even over short periods, making image matching a difficult problem. Since geometric properties of the environment are typically more stable than its photometric characteristics, we propose to rely on matching geometry in order to achieve long-term camera localization. Thus, our approach is agnostic to changes in photometric appearance. We present real-world experiments which demonstrate that our method accurately tracks the 6-DoF pose of a camera over long trajectories and under varying conditions. We evaluate our method using publicly available and own datasets and visualize the successful tracking by post-colorizing the given geometric map.
Studying Web Content Credibility by Social Simulation

The Internet has become an important source of information that significantly affects social, economical and political life. The content available in the Web is the basis for the operation of the digital economy. Moreover, Web content has become essential for many Web users that have to make decisions. Meanwhile, more and more often we encounter Web content of low credibility due to incorrect opinions, lack of knowledge, and, even worse, manipulation attempts for the benefit of the authors or content providers. While mechanisms for the support of credibility evaluation in practice have been proposed, little is known about their effectiveness, and about their influence on the global picture of Web content production and consumption. We use a game-theoretic model to analyze the impact of reputation on the evaluation of content credibility by consumers with varying expertise, in the presence of producers who have incentives to manipulate information.
Phonon transport simulations in low-dimensional, disordered graphene nanoribbons

In this work we investigate phonon transport in low-dimensional, disordered armchair graphene nanoribbons (GNRs). We use the non-equilibrium Green's function (NEGF) simulation technique and the force constant method. We focus on how different parts of the phonon spectrum are influenced by geometrical confinement and line edge roughness. In the ballistic case, phonons throughout the entire phonon energy spectrum contribute to thermal transport. With the introduction of line edge roughness, the phonon transmission is reduced, but quantitatively and qualitatively in different ways throughout the energy spectrum. We identify how each region of the spectrum reacts to low-dimensionality and disorder, and elaborate on how phonon transport is affected by that. We explain how and when phonons in different energies within the spectrum flow either ballistically, diffusively, or become localized depending on the channel geometry.
Designing studies to estimate the penetrance of an identified autosomal dominant mutation: Cohort, case‐control, and genotyped‐proband designs

One can obtain population‐based estimates of the penetrance of a measurable mutation from cohort studies, from population‐based case‐control studies, and from genotyped‐proband designs (GPD). In a GPD, we assume that representative individuals (probands) agree to be genotyped, and one then obtains information on the phenotypes of first‐degree relatives. We also consider an extension of the GPD in which a relative is genotyped (GPDR design). In this paper, we give methods and tables for determining sample sizes needed to achieve desired precision for penetrance estimates from such studies. We emphasize dichotomous phenotypes, but methods for survival data are also given. In an example based on the BRCA1 gene and parameters given by Claus et al. [(1991) Am J Hum Genet 48:232–242], we find that similar large numbers of families need to be studied using the cohort, case‐control, and GPD designs if the allele frequency is known, though the GPDR design requires fewer families, and, if one can study mainly probands with disease, the GPD design also requires fewer families. If the allele frequency is not known, somewhat larger sample sizes are required. Surprisingly, studies with mixtures of families of affected and non‐affected probands can sometimes be more efficient than studies based exclusively on affected probands when the allele frequency is unknown. We discuss the feasibility and validity of these designs and point out that GPD and GPDR designs are more susceptible to a bias that results when the tendency for an individual to volunteer to be a proband or to be a subject in a cohort or case‐control study depends on the phenotypes of his or her relatives. Genet. Epidemiol. 16:15–39, 1999. Published 1999 by Wiley‐Liss, Inc.
Reputation-aware energy-efficient solution for FANET monitoring

Ensuring the desired security is an important issue in all communicating systems and it becomes more challenging in open medium networks. Furthermore, the majority of the wireless and mobile networks including Flying Adhoc NETworks (FANETs) are built over energy-restricted devices. Hence, communication interface and computation complexity are additional factors to consider when designing secure protocols. as an alternative solution to cryptography, trust and reputation management solutions are able to sustain high security levels with less energy consumption. In this paper, we propose a new reputation-aware energy-efficient FANET monitoring technique, in which we first establish trust among different peers and then thanks to the trust and links duration combination, we distribute the network monitoring period between those trusting each other moving with similar mobility patterns. Simulations conducted using NS2 simulator show the efficiency of our proposal at both ensuring high detection rations (> 80%) and reducing by more than two times the average consumed energy.
Nuclear Localization of Yeast Nfs1p Is Required for Cell Survival*

Saccharomyces cerevisiae Nfs1p is mainly found in the mitochondrial matrix and has been shown to participate in iron-sulfur cluster assembly. We show here that Nfs1p contains a potential nuclear localization signal, RRRPR, in its mature part. When this sequence was mutated to RRGSR, the mutant protein could not restore cell growth under chromosomal NFS1-depleted conditions. However, this mutation did not affect the function of Nfs1p in biogenesis of mitochondrial iron-sulfur proteins. The growth defect of the mutant was complemented by simultaneous expression of the mature Nfs1p, which contains the intact nuclear localization signal but lacks its mitochondrial-targeting presequence. These results suggest that a fraction of Nfs1p is localized in the nucleus and is essential for cell viability.
Asymptotic BER performance of OFDM in frequency-selective Nakagami-m channels

The asymptotic error rate performance of orthogonal frequency division multiplexing (OFDM) signals in frequency-selective Nakagami-m fading channels is considered. A novel approach is provided to study the asymptotic error rate performance of a large class of modulations in general fading channels. This approach is applied to an OFDM signal on two-tap multipath Nakagami-m channels. Our analysis and numerical results show that the asymptotic error performance of an OFDM signal is similar to that of a single carrier signal transmitted over a Rayleigh fading channel. Our analysis further shows that a channel with two constant taps has similar asymptotic error rate performance to that of a one-sided Gaussian fading channel.
Analysis of Amplify-and-Forward Cooperative Networks with Nakagami-m fading Channels For MRC Diversity Combining

In this paper we study the effect of diversity combining for Nakagami -m fading Channels in the amplify-and-forward cooperative networks.We derive the cumulative density function (CDF), probability density function (PDF) and moment generating function (MGF) for the multiple relay amplify-and-forward network with single half duplex channel maximal ratio combiner (MRC). In this network we investigate the cases of MRC at the destination, as well derive the exact Symbol Error Rate (SER) of M-ary phase-shift keying (M-PSK), and quadrature amplitude modulation (M-QAM) in Nakagami -m fading environment. We present a comparison between M-PSK and M-QAM modulation schemes in some representative scenarios where an arbitrary number of cooperative relays is considered.
Cotton area estimation using muti-sensor RS data and big plot survey in Xinjiang

An accurate agricultural statistics act as an important source of decision making to decision makers. Cotton area is very important especially to Xinjiang, which had 3.2 million tons in cotton output for 2012, accounting for half of the national yield. Although the potential of remote sensing to facilitate agriculture management has been explored but still there are grounds of improvement which can be explored to add some tools and process to a more accurate remote sensing based agriculture management system in any area. This research presents a method to estimate cotton area in Xinjiang. Many field data had been accumulated including each main crop through the Big Plot Survey from 2011 to 2013. Meanwhile the MODIS NDVI product were used to build reference NDVI time series, according to the Big Plot Survey result. Higher spatial resolution RS data (Landsat-8 and HuanJing-1) merged NDVI series in 2013. Through the relative NDVI correction, the 30m merged muti-source NDVI series could be classified with sub-region classification method. Gaofen-1 satellite data were employed to validate the cotton distinguish result, which has 2m spatial resolution. Result shown our workflow is efficiency, and the total area of cotton is 1.692 million hectare in Xinjiang 2013.
Isolation and Characterization of a Novel Ribosome-Inactivating Protein from Root Cultures of Pokeweed and Its Mechanism of Secretion from Roots1

Ribosome-inactivating proteins are N-glycosidases that remove a specific adenine from the sarcin/ricin loop of the large rRNA, thus arresting protein synthesis at the translocation step. In the present study, a novel type I ribosome-inactivating protein, termed PAP-H, was purified from Agrobacterium rhizogenes-transformed hairy roots of pokeweed (Phytolacca americana). The protein was purified by anion- and cation-exchange chromatography. PAP-H has a molecular mass of 29.5 kD as detected by sodium dodecyl sulfate-polyacrylamide gel electrophoresis, and its isoelectric point was determined to be 7.8. Yeast (Saccharomyces cerevisiae) ribosomes incubated with PAP-H released the 360-nucleotide diagnostic fragment from the 26S rRNA upon aniline treatment, an indication of its ribosome-inactivating activity. Using immunofluorescence microscopy, PAP-H was found to be located in the cell walls of hairy roots and root border cells. PAP-H was determined to be constitutively secreted as part of the root exudates, with its secretion enhanced by a mechanism mediated by ethylene induction. Purified PAP-H did not show in vitro antifungal activity against soil-borne fungi. In contrast, root exudates containing PAP-H as well as additional chitinase, β-1,3-glucanase, and protease activities did inhibit the growth of soil-borne fungi. We found that PAP-H depurinates fungal ribosomes in vitro and in vivo, suggesting an additive mechanism that enables PAP-H to penetrate fungal cells.
Le jeu des contraintes dans la sélection du thème présuffixal

Dans le cadre d’une morphologie lexematique, les notions de theme et d’« espace thematique » ont fait leurs preuves pour rendre compte de l’allomorphie radicale des lexemes en ce qui concerne la flexion. Leurs premieres applications a la derivation ont ete prometteuses, mais un examen plus systematique souleve de nombreuses difficultes. L’articulation entre flexion et derivation, forte pour les verbes, est faible pour les adjectifs et nulle pour les noms. Dans ces deux categories, des travaux recents ont fait apparaitre un important polymorphisme (plusieurs formes pour un meme theme). La distinction entre un theme presuffixal « populaire » et un theme presuffixal « savant » reste pertinente, mais la selection de l’un ou de l’autre n’est nullement automatique : elle entre dans un jeu de contraintes, comme, a l’interieur de chaque theme, le choix des formes qui peuvent s’y trouver en concurrence. Ces contraintes sont principalement d’ordre lexical et visent a la coherence de la famille derivationnelle a laquelle appartiennent le lexeme et son derive ; a la coherence de la serie derivationnelle dans laquelle le derive doit s’integrer ; a la coherence entre le theme selectionne et le registre – populaire ou savant – auquel appartient le mode de formation. Elles visent egalement un maximum de sauvegarde, dans le derive, des dimensions phonique et graphique de la forme libre. Elles visent enfin une « bonne formation » phonologique du derive : syllabation, dissimilation, optimum prosodique.
Glycoproteins of 210,000 and 130,000 m.w. on activated T cells: cell distribution and antigenic relation to components on resting cells and T cell lines.

A glycoprotein complex of 210,000 and 130,000 m.w. , found on mitogen or alloantigen-stimulated human T cells and not on other hematopoietic cells, has been defined by a monoclonal antibody (Mab). The components of this complex are a subset of a larger family of proteins (210,000, 165,000 and 130,000 m.w.) defined by a second Mab. In a panel of hematopoietic cell lines and cell types, only activated T cells (including the cell line HUT-102) express the 210,000/130,000 complex and these cells also express the IL 2 receptor, a characteristic marker for activated T cells. The 210,000/130,000 m.w. complex (reactive with the Mab TS2/7) is present on all long-term activated T cells, including both the OKT4 and OKT8 subsets. The 210,000 m.w. subunit is expressed only on activated T cells. Other lymphoid cells express either the 130,000 m.w. subunit alone (unactivated lymphocytes, thymocytes, HUT-78) or the 130,000 subunit together with a 165,000 subunit (MOLT-4, HSB, and other leukemic T cell lines). The 210,000/130,000 m.w. , 165,000/130,000 m.w. and 130,000 m.w. complexes are antigenically related in that all share reactivity with the Mab A- 1A5 . Among non-lymphoid hematopoietic cells and cell lines, none express the 210,000 m.w. chain; adherent cells (monocytes) and myeloid cell lines each express single proteins of 130,000 to 155,000 m.w. Granulocytes and red blood cells are negative and platelets express multiple bands (165,000 and 140,000 m.w.). Immunoperoxidase staining of tissue sections showed that a broad range of tissues and cell types had material cross-reactive with the lymphoid 130,000 m.w. protein. However, only a discrete subset of those tissues and cells including blood vessel walls, connective tissue, smooth muscle, kidney mesangial cells, and some non-cellular matrix tissue, had material cross-reactive with the 210,000 m.w. protein on activated T lymphocytes.