Miracle-dz/UniFAR-FTUs huggingface dataset:
Application of the Hilbert Transform to Doppler Radar Signals from a Hypervelocity Gun

Abstract : A computer program is described that processes a Doppler radar signal to provide the position, velocity, and acceleration histories of a model in the barrel of a hypervelocity gun. The program uses the Hilbert transform as obtained via the Fourier transform. Algorithms for dealing with poor signal quality are described. Results from actual and simulated signals are presented. It is shown that the unique properties of the Hilbert transform result in a program that is fast, accurate, and easy to use.
Associazione indipendente tra la riserva di flusso coronarico e le pressioni di riempimento e il rilasciamento del ventricolo sinistro

Background: A cross-talk between coronary flow and left ventricular (LV) function is recognized. This study tested the hypothesis that impairment of coronary flow reserve (CFR) in arterial hypertension is associated with LV systolic and diastolic dysfunction, independently on abnormalities of LV geometry. Methods: We studied 59 newly diagnosed, never treated hypertensive patients, using transthoracic Doppler echocardiography, including pulsed Tissue Doppler of mitral annulus and CFR on left anterior descending artery (low dose dipyridamole). The study population was divided in 2 groups according to age-normalized relative wall thickness (RWTn): 36 with normal LV geometry (RWTn ≤ 0.41) and.23 patients with LV concentric geometry (RWTn > 0.41) Results: Patients with LV concentric geometry (RWTn > 0.41) had significantly lower midwall (but not endocardial) shortening, longer isovolumic relaxation time (IVRT), lower Tissue Doppler derived early diastolic velocity (Em), higher ratio of transmitral E velocity to Em and lower CFR than patients with normal LV geometry (RWTn ≤ 0.41). In the whole population lower CFR was significantly associated with lower midwall shortening and Em, longer IVRT and higher E/Em ratio. After controlling for heart rate, mean blood pressure and RWTn, only the relation of CFR with IVRT, Em and E/Em ratio remained significant. Conclusions: Reduced midwall mechanics is associated to lower CFR, a relation depending on LV concentric geometry. A reduced CFR is associated with both impaired relaxation and increased filling pressure, a relation that is independent on LV geometry and pressure load.
Performance of optical speckle displacement technique near-stress concentrators

The optical speckle-displacement correlation technique was developed to increase the reliability of surface displacement field recovery near stress concentrators. The performance of optical speckle correlators based on joint transform correlator (JTC) architecture and a joint power spectrum nonlinear filtering (median thresholding, adaptive median thresholding, ring median thresholding) is studied by using computer models of these correlators. The design of hybrid joint transform speckle correlator is detailed. Example results of correlation signal using computer models of digital speckle correlation and optical speckle-displacement correlation techniques and created hybrid joint transform speckle correlator setup are described.
Fabric defects detection using adaptive wavelets

Purpose – Fabric defects detection is vital in the automation of textile industry. The purpose of this paper is to develop and implement a new fabric defects detection method based on adaptive wavelet. Design/methodology/approach – Fabric defects can be regarded as the abrupt features of textile images with uniform background textures. Wavelets have compact support and can represent these textures. When there is an abrupt feature existed, the response is totally different with the response of the background textures, so wavelets can detect these abrupt features. This method designs the appropriate wavelet bases for different fabric images adaptively. The defects can be detected accurately. Findings – The proposed method achieves accurate detection of fabric defects. The experimental results suggest that the approach is effective. Originality/value – This paper develops an appropriate method to design wavelet filter coefficients for detecting fabric defects, which is called adaptive wavelet. And it is help.
On the operation and maintenance practices of wind power asset

Purpose – The purpose of this paper is to review the operation and maintenance practices within wind power applications and to clarify practical needs as gaps between researchers and practitioners.Design/methodology/approach – The paper collects, categorizes, and analyzes the published literature of both researchers and practitioners systematically.Findings – The paper defines significant issues in operation and maintenance of wind energy related to: site and seasonal asset disturbances; stakeholders’ requirements trade‐off; dependability and asset deterioration challenges; diagnostic, prognostic and information and communication technologies (ICTs) applications; and maintenance optimization models. Within each category, the gaps and further research needs have been extracted with respect to both an academic and industrial perspective.Practical implications – The use of wind energy is growing rapidly and the associated practices related to maintenance and asset management are still lacking. Therefore, the.
Genetic robustification of digital model-following flight-control systems

The dynamical characteristics of high-performance fighter aircraft vary considerably over typical operational flight envelopes, and digital model-following flight-control systems for such aircraft must accordingly be robust. However, the linearised dynamics of such aircraft are usually modelled as partially irregular plants, i.e. plants having rank-defective first Markov parameters for which no robustness results are currently available in the case of fast-sampling digital PID controllers. Genetic algorithms can, however, be used to tune such PID controllers so as to robustify them over entire flight envelopes. This use of genetic algorithms is illustrated by the design of a robustified digital model-following flight-control system for an open-loop unstable F-16 aircraft operating over a flight envelope involving three different flight conditions. <<ETX>>
Detection of paroxysmal atrial fibrillation by Lorenz plot imaging of ECG R-R intervals

Detection of atrial fibrillation (AF) is a critical issue of healthcare because it is an increased risk of serious brain infarction due to cerebral embolism despite that it is the commonest sustained arrhythmia. To improve the reliability of the detection of AF by the long-term monitoring of heartbeat signals, we developed machine-learning systems for detecting AF using the Allostatic State Mapping by Ambulatory ECG Repository (ALLSTAR) database of 24-h ambulatory electrocardiograms. Lorenz plot images were generated from consecutive segment of 600 R-R intervals and the pattern of image characteristic to AF was discriminated from those of non-AF segments, including sinus rhythm, frequent atrial ectopic beats, and atrial flutter. Lorenz plot images consisting of 10,035 known AF and 10,107 non-AF samples were provided to the machine learning algorithms of Convolutional Neural Network (CNN). The performance to detect AF was evaluated in the independent 50 samples of 24-h ECG including paroxysmal AF episodes. As the results, the CNN that detected Lorenz plot of AF with 100% sensitivity and 100% specificity was developed through the deep learning. The developed CNN system classified accurately all 24-h ECG data including paroxysmal AF episodes. Lorenz plot imaging of R-R interval dynamics is useful for effectively discriminating AF from non-AF by artificial intelligence.
Low-cost near-field probe for simultaneous E and H measurement with analog optical link

A low-cost near-field probe based on a double-loaded loop that can simultaneously measure electric and magnetic field components is presented. The probe is implemented on a printed circuit board (PCB) and is connected to the receiver by an analog optical link. The signal processing circuits and the LED-based emitters are placed close to the loop outputs, on the same PCB. The effects of the printed circuit board implementation on the antenna behavior, such as conductor's shape and presence of a dielectric inside the loop, are analyzed. Further construction details such as power management are described and calibration details are also provided.
Perceived attributes and organizational support influencing course management system adopter status in Historically Black Colleges and Universities

Perceived Attributes and Organizational Support Influencing Course Management System Adopter Status in Historically Black Colleges and Universities by Gayla Spooner Keesee M.Ed., Augusta State University, 1999 B.A., Augusta College, 1981 Dissertation Submitted in Partial Fulfillment of the Requirements for the Degree of Doctor of Philosophy Education Walden University November 2010 Abstract The rapid growth of online learning fueled by technologies including course management systems (CMS) has transformed the traditional educational landscape. Little research shows why faculty members at Historically Black Colleges and Universities (HBCUs) have been slow to adopt this new teaching paradigm. This quantitative, nonexperimentalThe rapid growth of online learning fueled by technologies including course management systems (CMS) has transformed the traditional educational landscape. Little research shows why faculty members at Historically Black Colleges and Universities (HBCUs) have been slow to adopt this new teaching paradigm. This quantitative, nonexperimental study utilized Rogers‘s diffusion of innovation theory as the theoretical base. Research questions explored faculty perceptions of the CMS‘s attributes (relative advantage, compatibility, complexity, trialability, observability) and organizational support (policies, procedures, and norms) in order to predict adopter status. The study used a convenience sample of 137 full-time faculty from 3 public and 2 private HBCUs in the southeastern U.S. Survey data were analyzed using descriptive statistics and logistic regression. The findings provided evidence that faculty in different adopter categories have varying characteristics and needs related to adoption and use of the CMS. Predictors for innovators were compatibility and complexity; for early adopters, relative advantage, complexity, and observability; and for early majority adopters, the predictor was complexity. For late majority adopters, compatibility, complexity, trialability, and observability were predictors; and predictive attributes for laggards were relative advantage, compatibility, complexity, and organizational support. Several individual factors were significant for each adopter category. The findings may be used to promote positive social change by providing a means for administrators and faculty development staff to predict adopter levels in order to develop initiatives that address differences in adopter needs, thereby facilitating adoption of the CMS and online learning. Perceived Attributes and Organizational Support Influencing Course Management System Adopter Status in Historically Black Colleges and Universities by Gayla Spooner Keesee MEd, Augusta State University, 1999 BA, Augusta College, 1981 Dissertation Submitted in Partial Fulfillment of the Requirements for the Degree of Doctor of Philosophy Education Walden University November 2010
State-of-the-Art Design and Rapid-Mixing Production Techniques of Lipid Nanoparticles for Nucleic Acid Delivery

Lipid nanoparticles (LNPs) are currently the most clinically advanced nonviral carriers for the delivery of small interfering RNA (siRNA). Free siRNA molecules suffer from unfavorable physicochemical characteristics and rapid clearance mechanisms, hampering the ability to reach the cytoplasm of target cells when administered intravenously. As a result, the therapeutic use of siRNA is crucially dependent on delivery strategies. LNPs can encapsulate siRNA to protect it from degradative endonucleases in the circulation, prevent kidney clearance, and provide a vehicle to deliver siRNA in the cell and induce its subsequent release into the cytoplasm. Here, the structure and composition of LNP–siRNA are described including how these affect their pharmacokinetic parameters and gene‐silencing activity. In addition, the evolution of LNP–siRNA production methods is discussed, as the development of rapid‐mixing platforms for the reproducible and scalable manufacturing has facilitated entry of LNP–siRNA into the clinic over the last decade. Finally, the potential of LNPs in delivering other nucleic acids, such as messenger RNA and CRISPR/Cas9 components, is highlighted alongside how a design‐of‐experiment approach may be used to improve the efficacy of LNP formulations.
Equine Sarcoid

The equine sarcoid is the most common skin neoplasia in the horse. It has a worldwide distribution and can also affect other equids such as donkeys, zebras, and mules. All breeds can develop the disease at any age, with no sex predilection, although geldings seem to be overrepresented. This fibroblastic neoplasm has several clinical presentations and microscopic features and has a nonmetastatic behavior but can be severely locally invasive. In many cases, multiple sarcoids may develop simultaneously or sequentially during their life and spontaneous remission is rarely reported. The etiology is multifactorial and involves bovine papillomaviruses, genetic, and environmental factors. Treatment options include different modalities depending on multiple factors: lesion type, location and extent, individual patient, facilities, owner, and financial issues.
Analysis of Antenna Selection in Two-way Relaying MIMO Systems with CPM Modulation

Up to now, many state-of-arts have been proposed for two-way relaying system with linear modulations. The performances of antenna selection (AS) at both transmit and relay nodes need to be investigated in some two-way relaying multiple-input multiple-output (TWRM) systems. In this paper, the goal is focused on the study of nonlinear modulations, i.e. , continuous phase modulation (CPM) in TWRM systems. Firstly, the joint phase trellis are simplified by reversed Rimoldi processing so as to reduce the systems’ complexity. Then the performances of joint transmit and receive antenna selection (JTRAS) with CPM modulations in two-way relaying MIMO systems are analyzed. More exactly, the pair wise probability (PEP) is used to evaluate the error performance based on the CPM signal matrix, which is calculated in terms of Laurent expression. Since the channels subject to two terminal nodes share common antennas at relay node R in multiple-access scheme, we revise the JTRAS algorithm and compare it to existing algorithm via simulation . Finally, the error performances for various schemes of antenna selection are simulated and compared to the analysis in this paper.
The study of online hospitality exchange : The case of couch surfing network

Tekijä: Taher Ali Zaki Opinnäytetyön nimi: Tutkimus vieraanvaraisuuden vaihto: "kysees sä CouchSurfing" Vuosi: 2015 Kieli: Englanti Sivumäärä: 62 Ohjaaja: Thomas Sabel Työ esitetään tässä ensinnäkin pyritään luomaan tietoisuutta koko käsite "sohvalla surfing," suhteellisen uusi ilmiö, kun haetaan "vaihtoehtoinen" ja edullisia tapoja matkustaa uusiin kohteisiin. Tämä erityisesti tutkimustyön hahmotellaan painopiste ja näkymiä vaihtoehtoisia tapoja matkustaa nykyään. Se sitten etenee selittää noin sohvalla surfing Idea, miten se toimii samoin kuin sen hyödyt ja kritiikkiä. Teoreettinen viitekehys tutkimustyö perustuu motivaatio tekijöitä on-listuu matkoilla vaihtoehtoisesti luokittelemalla matkustajat käyttäytyminen, intressit ja kokemukset sekä tekijöitä kasvu suosio sosiaalisten verkossa vieraanvaraisuuden välisiä verkostoja osallistujien. Tutkimus toteutettiin avulla laadullisen tutkimuksen, Inter-katselu 8 aktiivinen sohvalla surfing jäseniä. Kyselylomake on laadittu ja toimitettu osal-housut, joka perustuu löytää tietoa heidän tietoisuuttaan matkustaa ominaisuuksia. Miten aikojen ydin päätelmät perustuivat motivoivaa ja sosiaalisen vaihdon tekijöitä mukana käyttäen sohvalla surfing sekä sen hyödyt. Tutkijan oma kokemus ja ajatuksia myös jaettu lyhyesti. Tutkimuksen tulokset ja tutkimus osoittaa suurta innostusta ja luottaa kohti tällaista verkossa vieraanvaraisuuden verkkojen ja vaihtoehtoisia tapoja matkustaa (sohva surffaus) sekä kokous ja majoittuminen tuntemattomien matkoilla ulkomailla. Ehdotuksia saatiin myös osallistujien ja tutkijan siitä, miten saavuttaa positiivinen ja rikastuttava kokemus matkoilla ja käyttää sohvalla surfing verkkoon. Avainsanat: vaihtoehtoinen matkailu, sohva surffaus, luokittelu matkailijoille, motivaatio ja edut.
Solution of two-phase nonisothermal fluid flow problem with nonlinear filtration law on heterogeneous computing systems

The work is devoted to the methods of solving two-phase fluid flow problems in the reservoirs. It is assumed that in domain with high velocities Darcy’s law is violated and a nonlinear filtration law is used. To determine the temperature use the law of conservation of energy (first law of thermodynamics). The temperature of the fluid and of the skeleton are considered the same. The fluid viscosities are taken by the temperature functions. The methods for solving two-phase flow problems in porous medium with a nonlinear filtration law based on the decomposition methods are proposed. The proposed methods are implemented on the heterogeneous computing systems.
Nanoscale modification of key surface parameters to augment pool boiling heat transfer and critical heat flux in water and dielectric fluids

Surface effects on pool boiling heat transfer and the critical heat flux are well documented but poorly understood. This study investigates the pool boiling characteristics of various fluids, and demonstrates that surface effects can drastically alter the nucleate boiling heat transfer coefficient as well as the critical heat flux. Changes in surface morphology and surface chemistry are suspected to be the primary factors influencing pool boiling heat transfer. The relative impact of surface properties is shown to depend strongly upon the working fluid. To evaluate the effects of chemical constituency and surface texture on the pool boiling of water, nanoparticle thin-film coatings are applied to nickel and stainless steel substrates using the layerby-layer assembly method. This study shows that such coatings, with thicknesses on the order of one micron or less, are capable of enhancing the critical heat flux of water up to 100%, and enhancing the nucleate boiling heat transfer coefficient over 100%. Through the use of thin-film coatings, the importance of nanoscale surface texture, porosity, and chemical constituency on boiling mechanisms is revealed. Low surface tension dielectric fluids, including a recently developed fluorinated ketone with a low global warming potential, are tested to determine their pool boiling heat transfer capabilities. The potential for nanoparticle-based pool boiling enhancement in well-wetting dielectric fluids is investigated. The role of surface wettability and adhesion tension on the incipience of boiling, nucleate boiling, and critical heat flux are considered. Results indicate that the low global warming potential fluorinated ketone may be a viable alternative in the cooling of electronic devices. Additionally, results demonstrate that enhancement of boiling heat transfer is possible for well-wetting dielectric fluids, with 40% enhancement in the critical heat flux using dilute suspensions of aluminum or silica nanoparticles in the fluorinated ketone. THESIS SUPERVISOR: Lin-Wen Hu, Ph.D., PE TITLE: Associate Director and Principal Research Scientist, MIT Nuclear Reactor Laboratory THESIS SUPERVISOR: Jacopo Buongiorno, Ph.D. TITLE: Associate Professor of Nuclear Science and Engineering
A lightweight real-time host-based intrusion detection system

During recent years, the number of computer attacks has increased dramatically. These attacks can have costly effects including downtime for servers, the theft of valuable corporate data, and web site vandalism. Intrusion Detection Systems (IDS's) have become an important tool for detecting and preventing these computer attacks. IDS's may be either network-based, or host-based. Host-based IDS's provide monitoring capabilities for the system they are running on, while network-based systems analyze network traffic to detect attacks in the traffic to many machines. Host-based systems offer the advantage of being able to directly monitor the state of their host, while network-based systems need to infer the state of monitored machines. This thesis describes a host-based Intrusion Detection System for UNIX systems. The IDS, called ReaLLite, is capable of detecting attacks in real-time and is lightweight enough to run in the background of any system. ReaLLite runs as a user-process rather than with root privileges, thereby eliminating most potential security risks involved with its use and simplifying installation. ReaLLite monitors process data, network packet statistics and connection information, and file system inode data using standard UNIX commands and utilities. With this information, ReaLLite is capable of detecting buffer overflow attacks, Denial of Service attacks, and port scan probes. ReaLLite was tested using 7 attacks from the 1999 DARPA Intrusion Detection Evaluation and with 5 newer attacks. ReaLLite successfully detected 11 of these 12 attacks. All of the 8 buffer overflow attacks were identified, as was the port scan probe, and two of the three Denial of Service attacks. The only missed DoS attack disabled the monitored host before ReaLLite could respond. ReaLLite was also successfully ported to the Linux Operating System, and detected the two Linux attacks it was tested with. Thesis Supervisor: Richard P. Lippmann Title: Senior Scientist, MIT Lincoln Laboratory
New Product Development based on Web Technology - Case Studies in Brazilian Companies

The advent of new information and rapid-communication technologies such as extremely powerful desktop computers, the Internet, and the World Wide Web (web) are leading to new and exciting methods of concept evaluation. This paper aims to analyze how companies are exploring Web (Internet) technology for developing new products, based on the concepts of interactivity and connectivity. The adopted methodological approach was case study.Two service companies were studied, selected according to their previous (and preliminary) classification in the Strategic Grid. A plan was developed based on the theoretical background in order to carry out this research. Interviews were made with at least three different professionals (from different areas and hierarchical positions) of each company. Information was collected through semi-structured interviews. The choice of companies of different classification in the Grid is important to analyze the differences and similarities in the new product development process and to allow a comparison among these enterprises. The preliminary results allowed the identification of enablers and tools for supporting the development of a new product as well as the identification of the components that are used during the innovation cycle of creation of a product based on the web.