Miracle-dz/UniFAR-FTUs huggingface dataset:
Antenatal diagnosis and palliative treatment of non‐immune hydrops fetalis secondary to fetal parvovirus B19 infection

Hydrops fetalis was diagnosed at 22 weeks. An ultrasound examination demonstrated cardiomegaly and a fetal blood specimen obtained by cordocentesis revealed thrombocytopenia, anaemia, and neutropenia. Fetal paracentesis yielded straw‐coloured fluid with electrolytes indicative of a transudate. Non‐enveloped icosahedral viral particles approximately 23 mm in diameter were visualized in the ascitic fluid by electron microscopy. Immune electron microscopy confirmed human parvovirus B19. Direct fetal digitalization led to a reduction in umbilical artery resistance, a decline in the abdominal circumference from 20·3 to 17·8 cm, and resolution of the ascites within 72 h. Despite this dramatic response to therapy, fetal death occurred on day 5 of treatment. The initial maternal serum was positive for anti‐B19 IgM and IgG antibodies. Electron microscopy of fetal cardiac tissue obtained post‐mortem revealed intranuclear viral particles typical of B19, confirming the antenatal diagnosis of myocarditis. This case demonstrates that direct viral identification is applicable to prenatal diagnosis. To our knowledge, this is the first reported case of the antenatal diagnosis and palliative treatment of fetal viral infection.
Nonuniform multiview color texture mapping of image sequence and three-dimensional model for faded cultural relics with sift feature points

Abstract. For faded relics, such as Terracotta Army, the 2D–3D registration between an optical camera and point cloud model is an important part for color texture reconstruction and further applications. This paper proposes a nonuniform multiview color texture mapping for the image sequence and the three-dimensional (3D) model of point cloud collected by Handyscan3D. We first introduce nonuniform multiview calibration, including the explanation of its algorithm principle and the analysis of its advantages. We then establish transformation equations based on sift feature points for the multiview image sequence. At the same time, the selection of nonuniform multiview sift feature points is introduced in detail. Finally, the solving process of the collinear equations based on multiview perspective projection is given with three steps and the flowchart. In the experiment, this method is applied to the color reconstruction of the kneeling figurine, Tangsancai lady, and general figurine. These results demonstrate that the proposed method provides an effective support for the color reconstruction of the faded cultural relics and be able to improve the accuracy of 2D–3D registration between the image sequence and the point cloud model.
CHEMOTAXIS AND LOCOMOTION OF LEUKOCYTES

By chemotaxis6 is meant a directional response of the organism, in this case the leukocyte, to chemical substances in its environment. Chemotaxis is said to be positive if the cell moves toward higher concentrations of such substances; negative, if it moves away from higher concentrations. Chemotaxis is absent or indifferent if there is no directional response to the presence of the substance. It should be emphasized that chemotaxis is manifested by the direclion of movement, not by its velocity. When there is no known chemotactic substance in the field, the leukocyte may move as rapidly as when it is responding to a chemotactic stimulus. A convenient method’ for studying chemotaxis is to obtain a suspension of granulocytes by injecting salt solution into the periotoneal cavity of an animal such as the rabbit. When the fluid is withdrawn, after a few hours, it is centrifuged, and the precipitated cells are suspended in plasma. To elicit chemotaxis, a minute clump of bacteria or other particles is placed on a glass slide and allowed to dry. A drop of the cell-plasma suspension is superimposed and allowed to spread between slide and coverslip. This preparation, after being sealed with paraffin, is viewed on the warm stage of a microscope. The microscopic image of the cell may be projected by a device such as a camera lucida and the position of the cells recorded at intervals, or movements of cells may be recorded by motion pictures. Granulocytes begin to move a t once. If no chemotactic substance is present, their motion is a t random, the cells frequently changing direction, but if a clump of bacteria or collodion particles is in the field, the cells immediately move toward these particles. If, on the contrary, certain other particles such as kaolin, or aluminum silicate are present, all the cells move away. Such a negative response may be just as strong as the positive reaction to bacteria? The kinds of leukocytes which show chemotaxis best are the granulocytes, that is, neutrophilic and eosinophilic4 polymorphonuclears. No information is available about the reactions of basophils. Lymphocytes, on the contrary, do not show chemotaxis, at least under these conditions. * They move about half as fast as granulocytes, but their direction is not affected by bacteria or other material, as far as known. They may be studied conveniently by placing a drop of blood on a glass slide, and causing it to spread between slide and coverslip. Under these conditions, lymphocytes generally do not move at once, but only after minutes or even hours, differing in this respect from polymorphonuclears. In tissue cultures, such as of lymph nodes, however, locomotion is not thus delayed. In monocytes and macrophages, locomotion is delayed even more. In blood or exudate in dlro, these cells are stationary, beginning to move only after three or four days’ incubation. * However in cultures of tissue, such as omen-
Real-time detection of removed objects based on multi-cue fusion

In this paper, we propose a method to detect removed or stolen objects in complex environments robustly and efficiently based on the multi-cue adaptive fusion. In this method, the target observation is represented by multiple cues. When fusing each cue, a fusion scheme based on fuzzy logic has been developed. To solve the problem raised by part occlusions, target object is divided into multiple sub-parts and subsequently matching of at least one sub-part between current fields and initial model leads to a final decision that the target object is safe. Furthermore this method can distinguish target object into stolen or occluded objects by analyzing the matching degree of sub-parts with their initial models. Experimental results have demonstrated the effectiveness of the proposed method.
The Detection of IRC Botnet Based on Abnormal Behavior

Botnet is one of the major security threats to Internet. In this paper, botnet communication and attack patterns were introduced, and the discovery method of botnet based on abnormal behavior was studied. For the current botnet, mainly based on IRC protocol, an automatic identification system is designed to help analyze and dispose botnet effectively
Frequency-dependent effects on global S-wave traveltimes: wavefront-healing, scattering and attenuation

SUMMARY We present a globally distributed data set of ∼400 000 frequency-dependent SH-wave traveltimes. An automated technique is used to measure teleseismic S, ScS and SS traveltimes at several periods ranging from 10 to 51 s. The targeted seismic phases are first extracted from the observed and synthetic seismograms using an automated time window algorithm. Traveltimes are then measured at several periods, by cross-correlation between the selected observed and synthetic filtered waveforms. Frequency-dependent effects due to crustal reverberations beneath each receiver are handled by incorporating crustal phases into WKBJ synthetic waveforms. After correction for physical dispersion due to intrinsic anelastic processes, we observe a residual traveltime dispersion on the order of 1–2 s in the period range of analysis. This dispersion occurs differently for S, ScS and SS, which is presumably related to their differing paths through the Earth. We find that: (1) Wavefront-healing phenomenon is observed for S and to a lesser extent SS waves having passed through very low velocity anomalies. (2) A preferred sampling of high velocity scatterers located at the CMB may explain our observation that ScS waves travel faster at low-frequency than at high-frequency. (3) A frequency-dependent attenuation q(ω) ∝q0×ω−α, with α∼ 0.2, is compatible with the globally averaged dispersion observed for S waves.
Compressive hyperspectral time-resolved wide-field fluorescence lifetime imaging

Single-pixel system enables hyperspectral fluorescent lifetime imaging. Spectrally resolved fluorescence lifetime imaging1,2,3 and spatial multiplexing1,4,5 have offered information content and collection-efficiency boosts in microscopy, but efficient implementations for macroscopic applications are still lacking. An imaging platform based on time-resolved structured light and hyperspectral single-pixel detection has been developed to perform quantitative macroscopic fluorescence lifetime imaging (MFLI) over a large field of view (FOV) and multiple spectral bands simultaneously. The system makes use of three digital micromirror device (DMD)-based spatial light modulators (SLMs) to generate spatial optical bases and reconstruct N by N images over 16 spectral channels with a time-resolved capability (∼40 ps temporal resolution) using fewer than N2 optical measurements. We demonstrate the potential of this new imaging platform by quantitatively imaging near-infrared (NIR) Förster resonance energy transfer (FRET) both in vitro and in vivo. The technique is well suited for quantitative hyperspectral lifetime imaging with a high sensitivity and paves the way for many important biomedical applications.
Filtering methods for broadcast authentication against PKC-based denial of service in WSN: a survey

Broadcast authentication is used to determine legitimate packet from authorized user. The received packet can be forwarded or used for the further purpose. The use of digital signature is one of the compromising methods but it is followed by high complexity especially in the verification process. That phenomenon is used by the adversary to force the user to verify a lot of false packet data. Kind of Denial of Service (DoS) which attacks the main signature can be mitigated by using pre-authentication methods as the first layer to filter false packet data. The objective of the filter is not replacing the main signature but as an addition to actual verification in the sensor node. This paper contributes in comparing the cost of computation, storage, and communication among several filters. The result shows Pre- Authenticator and Dos Attack-Resistant scheme have the lower overhead than the others. Thus followed by needing powerful sender. Moreover, the key chain is promising methods because of efficiency and effectiveness.
Influence of the soil on reflections from above surface objects in GPR data

During a ground penetrating radar (gpr) survey special attention must be paid to objects which are present above the earth surface. These objects can result in unwanted reflections in the measured data. Due to the low losses in air and the high velocity, these reflected waves can obscure the data and can make the interpretation of gpr data a difficult task. Especially in an urban area it is important to know the origin of these reflections and how to reduce the influence of these unwanted reflections. The radiation characteristics of a horizontal dipole are investigated to determine the sensitivity for reflections coming from an object which is present above the surface. Both the amplitude and polarisation of the electric field play an important role. It is shown that the presence of the soil enables relatively strong reflections from vertical objects, which are present in a specific plane relative to the antennas. This analysis indicates that a reduction of the amplitude of unwanted reflections is possible by changing the acquisition parameters. A validation of these expectations is carried out by numerical modeling using a 3D modeling package for different objects present above the surface, which confirms the former expectations that the amplitude of unwanted reflections can be reduced by choosing a proper orientation of the source and receiver
An Information System for Coping with Student Dropout

Student dropout prevention is one of the most important challenges of the education system. This study examines the effectiveness of a Local Authority Information Center LAIC, developed in Israel to cope with that problem. The research population included 418 regular attendance officers RAOs, educators who deal with students who drop out and those who are at risk of dropping out. The RAOs were divided into an experimental group, who performed their work using the information system, and a control group who used manual means. The research findings show that the information system improved the comprehensive nature of the information and its relevance for students at risk of dropping out, and resulted in an increase in the number of students treated by the RAOs. This improvement was maintained over a period of three years. The LAIC is likely to offer an effective and professional approach to reducing the problem of student dropout.
Nanoparticle coated optical fibers for single microbubble generation

The study of bubbles and bubbly flows is important in various fields such as physics, chemistry, medicine, geophysics, and even the food industry. A wide variety of mechanical and acoustic techniques have been reported for bubble generation. Although a single bubble may be generated with these techniques, controlling the size and the mean lifetime of the bubble remains a difficult task. Most of the optical methods for generation of microbubbles involve high-power pulsed laser sources focused in absorbing media such as liquids or particle solutions. With these techniques, single micron-sized bubbles can be generated with typical mean lifetimes ranging from nano to microseconds. The main problem with these bubbles is their abrupt implosion: this produces a shock wave that can potentially produce damages on the surroundings. These effects have to be carefully controlled in biological applications and in laser surgery, but thus far, not many options are available to effectively control micron-size bubble growth. In this paper, we present a new technique to generate microbubbles in non-absorbing liquids. In contrast to previous reports, the proposed technique uses low-power and a CW radiation from a laser diode. The laser light is guided through an optical fiber whose output end has been coated with nanostructures. Upon immersing the tip of the fiber in ethanol or water, micron-size bubbles can be readily generated. With this technique, bubble growth can be controlled through adjustments on the laser power. We have obtained micron-sized bubbles with mean lifetimes in the range of seconds. Furthermore, the generated bubbles do not implode, as verified with a high-speed camera and flow visualization techniques.
The laboratory demonstration and signal processing of the inverse synthetic aperture imaging ladar

This paper presents a coherent inverse synthetic-aperture imaging ladar(ISAL)system to obtain high resolution images. A balanced coherent optics system in laboratory is built with binary phase coded modulation transmit waveform which is different from conventional chirp. A whole digital signal processing solution is proposed including both quality phase gradient autofocus(QPGA) algorithm and cubic phase function(CPF) algorithm. Some high-resolution well-focused ISAL images of retro-reflecting targets are shown to validate the concepts. It is shown that high resolution images can be achieved and the influences from vibrations of platform involving targets and radar can be automatically compensated by the distinctive laboratory system and digital signal process.
Design of a variable stiffness actuator using shape memory alloy wire

A linear (translational) actuator using synergistically configured shape memory alloy (SMA) actuator wires is designed to work by the principle of variable stiffness actuation. Synergistic SMA actuators use aiding force to create repetitive motion and are thereby capable of producing increased displacement when compared to the antagonistically biased SMA systems. The stiffness variant in the SMA actuator wires and, the force and displacement characteristics of the actuator are obtained experimentally. The actuator (system) model is obtained using the experimental data. Stiffness feedback is employed for control; in order to measure up the performance of the actuator with stiffness feedback, a comparison is made with displacement and force feedback. Simulations are carried out for regulation and tracking control. The control results demonstrate that, stiffness feedback enhances the performance of the (variable stiffness) actuator.
On the interpretation of word frequency as a variable affecting speed of recognition.

The duration for which a printed English word must be presented visually to a subject in order for him to recognize it is inversely correlated with the frequency of occurrence of the word in large samples of written English (2, 3, 4, 7, 8, 11). Since the former quantity (the duration threshold) is generally regarded as a perceptual variable and the latter (word frequency) as a response variable, this correlation offers a point of departure for the formulation of perceptual phenomena in behavioral concepts. The object of the present study is to test experimentally an assumption basic to one interpretation of this correlation. A mathematical formulation of the experimental data based upon this interpretation will be presented in a subsequent report. The interpretation to be considered here can be characterized as a responseemission theory. We may think of the momentary probability of a word (defined as the strength of S's tendency to emit that word in preference to any other) as a quantity that fluctuates widely from moment to moment in accordance with changes in innumerable environmental and organismic conditions that affect the emission of words. Over a time period of considerable length the average of these momentary probabilities will be a relatively stable statistic, which we shall call the base probability of the word. Visual exposure of a word to S for a brief length of time At is assumed to represent an environmental event tending to cause emission of the ex1 Present address: Wrightsville Beach, N. C. posed word. The momentary probability of a word following its exposure may therefore be analyzed into two components: a component due to the ordinary impulses to emission of the word, whose average value is the base probability; and a component due to the additional impulse of the word's visual exposure. Consequently, the average probability of a word following each of a number of exposures of given duration must be greater than the corresponding average base probability of the word. A given level of probability following exposure can result either from a relatively large component due to base probability plus a small additional component due to exposure or from a relatively small component due to base probability plus a large additional component due to exposure. It follows that the duration threshold of a word, which is defined as the duration of exposure for which 50% of S's reports following exposure are correct, will be lower for a word with high base probability than for a word with low base probability. In this interpretation of the experimental data, word frequency serves as an estimate of base probability. In the cited experiments word frequency was determined from the published tables of the Lorge magazine count (10). This count is based on a sample of 4.5 million words of text taken from issues of five popular magazines
Silica waveguide-type ring resonators for resonant micro-optic gyroscopes

The resonant micro-optic gyroscope (RMOG) is an attractive candidate for inertial rotation sensors requiring small, light and robust gyros. A high-performance RMOG needs a low-loss and high finesse waveguide-type ring resonator (WRR). Two general configurations of the WRRs which are made of Ge-doped silica core waveguides based on plasma enhanced chemical vapor deposition including the reflector-type and the transmitter-type are introduced. The reflector-type WRR with a length of 7.9 cm and a diameter of 2.5 cm has a finesse of 196.7 and a resonant depth of 98%. In addition, it’s pigtailed with single-polarization fiber to reduce the polarization error. The transmitter-type WRR with a length of 15.9 cm and a diameter of 5.06 cm has a finesse of 128 and a resonant depth of 95%. The waveguide loss low as 0.007 dB/cm has been measured, leading to the shot-noise limited sensitivity of 1.0/h when the average optical power at the input of the photodetector is 1 mW and the detecting bandwidth is 1 Hz.
A hybrid local and global multi-object tracking with semantic spatial and appearance modules

Multi-object tracking is one of the most challenging problem among computer vision applications due to computational cost, partial or full occlusions, crowded scenes, and etc. It has many real-life applicable uses from surveillance to video analysis and video summarization. In this paper, We propose a hybrid tracking-by-detection system that combines local and global data association scheme to ensure efficiency and reduce complexity. In local data association, spacial and appearance modules are used to ensure first step assignment for the strongest object matching. Then tracklet linking is applied during global data association step after filtering out all unreliable and distractor hypotheses using spacial, temporal and appearance descriptors. Our framework can handle the appearance of new objects, temporal disappearance, object terminations, and object occlusions. Our experiments on MOT16 dataset 1 that consisting of challenging real-world videos shows the integration between local and global data association is important and having promising performance.
Association between the Presence of the Panton-Valentine Leukocidin-Encoding Gene and a Lower Rate of Survival among Hospitalized Pulmonary Patients with Staphylococcal Disease

Staphylococcus aureus is responsible for more than 2% of cases of community-acquired pneumonia and 10% of cases of nosocomial-acquired pneumonia. The lethality rate of such infections ranges from 30% to 80% ([6][1]). These infections are complicated by the fact that these bacteria have acquired
Efficient Scoring-Rule in Multipart Procurement Auctions for Power Systems Reserve

In this paper, scoring-rules are analyzed based on the German markets for procuring power system reserves. For paying accepted offers, the pay-as-bid settlement-rule is applied. Each offer consists of a reserve capacity and two prices. The capacity price is for holding the capacity in reserve and the energy price is for delivery in case of actual use. A scoring-rule is applied to value the two-part price bids. Today, this scoring-rule is based on procuring the offers in the rank order of the capacity prices. A first analysis of historic price data indicates efficiency problems due to this scoring-rule. This leads to proposing to value the two-part price bids based on the ex post knowledge of the actual use of the procured reserves. It is shown that in contrast to today's scoring-rule, this duration curve approach gives incentives to reveal the variable generation costs in the energy price bids.