Miracle-dz/UniFAR-FTUs huggingface dataset:
Early Improvement of Left Ventricular Dyssynchrony After Percutaneous Coronary Intervention in Patients with Single Chronic Total Occlusion Vessel

Background The effect of percutaneous coronary intervention (PCI) of chronic total occlusion (CTO) on left ventricular dyssynchrony was unclear. Methods Patients with one CTO vessel were included. Tissue Doppler imaging was used to assess the left ventricular dyssynchrony index (DI) in twelve segments before and after successful CTO PCI. Multiple regression was used to identify independent correlates of DI reduction. Results 41 patients were included with the mean age of 65.88 years. 39(95.12%) had left ventricular DI more than 33. It decreased significantly from 67.48 ± 28.73 to 44.69 ± 23.90 (P < 0.01) after successful CTO PCI. PCI of infarct-relative CTO was associated with less percentage of DI reduction (Coefficient [Coef.], 25.60; 95% confidence interval [CI], 8.13–43.08; P < 0.01). Higher initial DI was associated with more percentage of DI reduction (Coef., -0.35; 95% CI, -0.67- -0.03; P = 0.03). Percentage of DI reduction was associated with ejection fraction (EF) improvement (Coef., -5.09; 95% CI, -7.45- -2.72; P < 0.01) with linear relationship (P < 0.01). Conclusion Left ventricular dyssynchrony was reduced early after successful CTO PCI, which predicted EF improvement. The association between dyssynchrony reduction and long-term benefits of CTO PCI are expected.
Optimising Output Characteristics of (edgeemitting) Light Emitting Diodes (eeLEDs)

Stripe contact (edgeemitting) LEDs have been found to be suitable for many applications in present day optical/photonics devices and systems. Polarised light (i.e., light with dominantly a single polarisation direction) is required for various applications. Semiconductor LASERs generate polarized light but such sources may not be suitable due to other reasons such as the ‘speckle’ effect that occurs due to the highly coherent LASER light; also, if the source is to be part of a monolithically integrated optical circuit it will be expensive to produce the two reflective planes needed for the LASER to operate. Unlike semiconductor Lasers, however, stripecontact TM ASE, and yet be easy to fabricate. Rays and Rate Equations analysis is used to model the device. A computationally efficient model for stripe contact semiconductor optical devices is designed and used to obtain design guidelines for the “V”geometry device, which is taking benefits and advantages to design a polarisationselective eeLED device. Simulation results from the model are shown. edgeemitting LEDs in bulk active layer semiconductor material tend to produce nearly unpolarised light. LED sources but with polarised output are attractive for various applications such as in Optical Coherence Tomography (OCT). The objective of this project is to design a simple, inexpensive device structure to achieve polarisation enhanced output by using stripecontact edgeemitting LEDs in bulk active layer semiconductor material, with multilayer, DoubleHeterostructure (DH), as commonly used for semiconductor Lasers and LEDs. As is well known light in the material is primarily generated by spontaneous emission. If the material is ‘pumped’ sufficiently then there will be net stimulated emission which corresponds to having optical gain; in that case the spontaneously emitted light will experience optical emission as it progresses through the material resulting in Amplified Spontaneous Emission (ASE). In this condition of operation the eeLED is often referred to as the Superluminescent LED (SLED). It is also well known that in bulk active layer semiconductors spontaneous emission occurs uniformly in all polarisations and that the material gain is also polarisation independent. Hence the generated ASE is equally distributed in TE & TM polarisations. The challenge, therefore, is to find a scheme which that would generate dominantly TE or dominantly
G6PD and HBB polymorphisms in Senegalese population: prevalence and correlations with clinical malaria

Background Several genetic polymorphisms were reported to be prevalent among populations living in tropical endemic regions and induce protection against malaria. In this study, we investigated the prevalence of key malaria-protective polymorphisms in G6PD and HBB genes in a Senegalese population. Methods We performed a retrospective study in 323 samples from patients recruited in hospitals located in three different endemic areas where malaria episodes were confirmed. Patients enrolled were classified in two groups: severe (153 patients) and uncomplicated malaria (170 patients). PCR and DNA sequencing assessed host genetic polymorphisms in HBB and G6PD. Using a multivariate regression and additive model, estimates the impact of human HBB and G6PD polymorphisms on malaria incidence were performed. Results We identified 12 SNPs in HBB gene. Among them, 6 SNPs (rs7946748, rs7480526, rs10768683, rs35209591, HbS (rs334) and rs713040) were detected with high frequencies in global population. The MAF of the sickle cell HbS polymorphism was estimated to 0.026, 0.069 and 0.035; and HbC polymorphism was estimated to be 0, 0.009, 0.029, in SM, UM and CTR group respectively. The MAF of G6PD deficiency polymorphisms such as G6PD-202 G>A were 0.022, 0.032 and 0.018 in SM, UM and CTR, respectively. Analysis of selected HbS polymorphism showed significant association with protection against severe malaria with a significant p-value = 0.033 (OR 0.38, 95%CI: 0.16–0.91). Surprisingly, HbC polymorphism is not a protective variant in our population. Finally, we found that the selected SNPs were associated to biological parameters such as PNE, PNB and lymphocytes. Conclusion Our data report at the first time the prevalence of HBB and G6PD mutations in senegalese population. These deficiencies are very common in West Africa endemic regions such as Gambia, Mali and Burkina Faso. Our findings show the important role of genetic factors in malaria outcome and these genetic markers could be good tools for malaria diagnosis and prognosis. Keywords : severe malaria, HBB, G6PD, Polymorphisms, Senegal, severe malaria.
Democratic Disarray: Organizational Messaging Coherence and the Local Echoing Press During the 2020 Iowa Democratic Caucus

The Iowa caucuses are the inaugural event of the American presidential nomination process. When the state Democratic Party failed to report the 2020 caucus results in a timely manner, researchers began to assess how party and press officials co-constructed the events. This research presents an in-depth case of the Iowa state and local Democratic Party’s public communication response regarding an event described by the Des Moines Register as “hell” and a “results catastrophe. ” Specifically, we were interested in how the Iowa Democratic Party responded to the crisis event and the extent to which the party organization was successful in disseminating favorable messaging about the caucus process to the local press. Drawing on organizational crisis management and echoing press perspectives, this analysis uses network and qualitative analytic approaches to assess message development, dissemination, and ultimately adoption. A local event with national implications presents a critical case in investigating how a political party, due to its institutional role in American elections and unique organizational structure, struggled to respond to the crisis.
Prognostics for Bus-Architecture Vehicles

Abstract : The goal of condition-based maintenance (CBM) is to optimize operational readiness of equipment through predictive and proactive maintenance. This capability requires accurate prediction of the remaining useful lifetime of each component, so that each may be replaced shortly before it is likely to impair mission readiness. By reducing unnecessary component replacements while still providing effective maintenance, effective Condition Based Maintenance ensures reliability of the warfighter's equipment at lessened expense, thus enhancing mission capability. The practice of forming predictions of component reliability is called prognostics. In this paper we consider the application of prognostics to military vehicles utilizing data bus architecture, particularly in the context of the Advanced Multiplex Test System (AMTS). We discuss several methods of designing prognostics (including incorporating the use of machine learning) as well as the barriers existing in this domain environment both to design and implementation of effective predictive maintenance. We present a variety of suggestions for a gradual approach to developing prognostics capabilities in this setting.
Investigation of Core Loss Calculation Methods for Nanocrystalline Core in
Medium Frequency Range

Nanocrystalline core is often adopted in high-power medium-frequency transformer, whose excitation voltage is usually a rectangular wave with an adjustable duty ratio. In this paper, several kinds of methods are proposed for core loss calculation under non-sinusoidal voltage excitation by modifying the original Steinmetz equation (OSE). Firstly, these correction methods are compared in theory, and their analytical equations under rectangular voltage with an adjustable duty ratio are deduced. Then, a hysteresis loop measurement system is established to measure the core loss density of a nanocrystalline core. Based on the measured results of the core loss density under sinusoidal voltage excitation, the coefficients of OSE for the core are fitted. Finally, core loss calculation results using the proposed correction methods under different amplitudes and duty ratios are analyzed and compared with the measured values. The results verify the correctness of the theoretical analysis, that waveform-coefficient Steinmetz equation is the most suitable method for loss calculation of nanocrystalline core in medium frequency range when the excitation voltage is a rectangular wave with an adjustable duty ratio.
Anticoagulant and Antiplatelet therapy for the prevention of stroke in AF with arterial origin stroke: a meta-analysis.

Background Anticoagulation and antiplatelet therapy were adopted respectively for the prevention ofcardio-embolic stroke or arterial origin stroke. while it’s difficult to make decisions for individual with Atrial fibrillation(AF)and arterial origin stroke as comorbidities, so we attempted to evaluate the efficacy and safety ofanticoagulants and antiplatelet forthe prevention of stroke in AF with arterial origin stroke and make an optimal treatment for these comorbidities. Methods Databases included PubMed, Cochrane Library and ClinicalTrials.gov were searched up to 31 Aug 2019. Eight RCTs with 77048 participants were enrolled. Results Direct oral anticoagulants(DOACs) reduced the relative risk of stroke and systemic embolism by 15% (95%CI 0.75-0.97, I2=65.6%) and the major bleeding by 23%(95%CI 0.63-0.95, I2=92.3%,). DOACs or warfarin plus aspirin compared with DOACs or warfarin alone did not show the benefit on stroke and systemic embolism prevent in AF patients, but increase the risk of major bleeding with RR 1.40 (95%CI 1.13-1.75,) and 1.33（95%CI 1.09-1.63）respectively. No differences in preventionof ischemic stroke were detected between OACs versus aspirin in arterial origin stroke. The major bleeding was significantly higher in the OACs group (RR,2.40,1.46-3.94, I2=62.2%). However, compared with aspirin, rivaroxabandid not increase the risk of major bleeding in Branch atheromatous stroke (RR,1.54,95%CI 0.26-9.12). Conclusions We speculatedthat DOACs alone may be enough to prevent stroke recurrence and not to increase the risk of bleeding in AF patients with arterial origin stroke. The well designed RCTs with the direct comparison would be needed in future.
Fault Detection in Wind Turbine: A Systematic Literature Review

Wind power has become one of the popular renewable resources all over the world and is anticipated to occupy 12% of the total global electricity generation capacity by 2020. For the harsh environment that the wind turbine operates, fault diagnostic and condition monitoring are important for wind turbine safety and reliability. This paper employs a systematic literature review to report the most recent promotions in the wind turbine fault diagnostic, from 2005 to 2012. The frequent faults and failures in wind turbines are considered and different techniques which have been used by researchers are introduced, classified and discussed.
The Challenges of Offshore Power System Construction - Troll A, Electrical Power Delivered Successfully to an Oil and Gas Platform in the North Sea

In February 2005 the world’s first offshore HVDC transmission was successfully commissioned. It consists of two parallel 40 MW transmissions connecting the Troll A gas platform in the North Sea, with the mainland 132 kV grid via compact polymeric DC cables. A compact and lightweight offshore module was designed by ABB in collaboration with the client Statoil. The project has allowed valuable experience in the design and construction of high voltage plant in a salt laden, hostile environment to be obtained. With safety as a primary consideration, considerable experience in offshore construction techniques has been gained. The success of the Troll project has been one of the key components for British Petroleum, who in June 2005 placed a second offshore HVDC Light order with ABB for their 78 MW transmission to the Valhall field. The engineering design and construction challenges overcome in these pioneering offshore projects is directly transferable to the new high power, high voltage, offshore substations required to enable, safe, reliable operation of the future very large offshore wind farms.
Design of Attitude Control System of a Double CubeSat

The NTNU Test Satellite, NUTS, is a satellite being build in a student CubeSat project at the Norwegian University of Science and Technology. The project was started in September 2010 as a part of the Norwegian student satellite program run by NAROM (Norwegian Centre for Space-related Education). The NUTS project goals are to design, manufacture and launch a double CubeSat by 2014. As payload an IR-camera observing waves in the air-glow layer is planned, as well as a short-range RF experiment. The satellite will fly two transceivers in the amateur radio bands. Final year master students from several departments are the main contributors in the project and most of the system components are designed and built by students. As the main payload is an IR-camera and one of the main goals once in orbit is to take pictures of the gravity waves in the atmosphere, a reliable Attitude Determination and Control System (ADCS) is important. In order to take reliable pictures, an absolute requirement is that the camera does not miss the Earth, and more accurately be able to point towards the Earth in such a matter that unwanted disturbances, such as stars and other light sources in space, is not in the camera's field of view. In this paper, a realistic simulation environment have been created in order to assess and design an Attitude Control System (ACS) to be implemented on the satellite. Magnetorquers as the satellite's actuators have been designed. Further, a detumbling control algorithm using an estimated derivative of the geomagnetic field measured with a magnetometer, is shown to be working satisfactory, even when being subjected to heavy environmental disturbances. Linear and nonlinear reference control algorithms subjected to realistic disturbances in the space environment have been tested and compared as well. Comparisons between a proportional derivative (PD) controller and a linear quadratic regulator (LQR) are presented, and the nonlinear controller proved to give best results and pointing control good to take pictures of the Earth atmposphere is achieved.
An image dimensionality reduction method for rolling bearing fault diagnosis based on singular value decomposition

The fast kurtogram, a faint signal extraction method, has been regarded as an effective approach to detect and characterize faint transient features in vibration signals. However, the fast kurtogram, a band-pass filtering method, which extracts transient signals by optimal frequency band selection and leaves the noise in the selected frequency band unprocessed. Therefore, to overcome the shortcoming of the fast kurtogram method, a method which can wipe off the noise in the whole frequency band is necessary. This paper proposes a novel faint signal extraction method by time–frequency distribution image dimensionality reduction. Since time–frequency distribution image can reveal intrinsic feature of nonstationary signals and can make the weak impulses feature prominent, and besides, the transient impulse feature and the noise component lie in different dimensions, so using the dimensionality reduction method based on singular value decomposition to suppress the background noise in the raw time–frequency distribution image is motivated. A bearing outer race fault signal obtained from a test-to-failure experiment and a bearing inner race fault signal obtained from an experimental motor are employed to demonstrate the enhanced performance of the proposed method in faint signal extraction. The results indicate that the proposed method outperforms the fast kurtogram method and is effective in faint signal extraction.
A Study on the Korean Standard -Quality Excellence Index(KS-QEI)

The 'KS-QEI' is the quality evaluation model developed both by Korean Standard Association(KSA) and this research team, reflecting the characteristic of KS products' quality and the customers' demand factors. KS-QEI is a general index measuring and announcing KS products' quality excellency through the evaluation of its real user including customers and specialists. This index aimed to evaluate and announce the quality level of KS product annually which was the motivation of products' quality improvement to enterprises and guaranteed the products' reliability to customers. Ultimately, by competing in good faith among domestic enterprises and preparing foundation of continuous research and investment inducement, it was expected to improve the Korean industry's competitive power. This study was intended to develop improved KS-QEI by analysing 2006 research result, to which it had applied ameliorated and enlarged index in 2005. Especially, it established the weight by Analytic Hierarchy Process(AHP), which led to estimate weight mathematically by comparing and evaluating the importance and difficulty by its index. And this paper analyzed the research result by using multi-variate statistical methods.
Technology Readiness and Propensity of Cell Phone Users to Subscribe to Commercial Messaning Services

The use of messaging service as a marketing channel has not been sufficiently explored in the marketing literature. The purpose of this study is to: (1) examine the effect of technology readiness on cellular (mobile) telephone users in association with the propensity to subscribe to commercial short messaging services, (2) identify the types of short messaging services in demand, and (3) identify the preferred receiving time and frequency. The study uses the technology readiness index (TRI) as a part of a comprehensive questionnaire to conduct the study among cellular telephone users in Thailand. Multivariate statistical techniques were used in analyzing the data. The findings suggest that an individual's technology readiness plays a minor role in explaining a cell telephone user's attitude towards subscribing to commercial short messaging services. Nonetheless, a number of short messaging services are demanded by cell telephone users. The preferred receiving time varied during the day while the preferred receiving frequency is one to three times per day.
Information fusion and cooperative control for target search and localization in multi-agent sensor networks.

Multi-agent sensor networks (MSNs) are comprised of multiple static or mobile agents capable of collecting, processing, storing and transferring information from one agent to another. They can play a critical role in several application domains such as landmine detection and identification, monitoring of endangered species, monitoring of urban environments, manufacturing plants, and civil infrastructure, and intruder and target detection systems. These networks are expected to operate cooperatively and reliably in cluttered dynamic environments with little human intervention. However, coordinating such large heterogeneous sensor networks is challenging and requires the development of novel methods of communication, motion control and planning, computation, proactive estimation and sensing, and power management. This thesis summarizes research results on information fusion and cooperative control for target search and localization in MSNs. First, the distributed target estimation problem for linear time-varying systems in MSNs is addressed. A diffusion Kalman filtering algorithm based on the covariance intersection method is proposed, where local estimates are fused by incorporating the covariance information of local Kalman filters. Our algorithm leads to a stable estimate for each agent regardless of whether or not the system is uniformly observable locally with the measurements of itself and its neighbors as long as the system is uniformly observable with the measurements of all agents and the communication is sufficiently fast compared to the sampling. Simulation results validate the effectiveness of the proposed distributed Kalman filtering algorithm. Nanyang Technological University Singapore