Miracle-dz/UniFAR-FTUs huggingface dataset:
The hybrid structural interaction matrix: A new prioritizing tool for maintenance

Purpose – The purpose of this paper is to present a new star in the continuous improvement research, the hybrid structural interaction matrix (HSIM). The work compares the results of this decision science methodology with that of analytical hierarchy process (AHP) with a case drawn from a published work in the maintenance performance literature. It further identifies certain areas of improvements for enrichment of this body of knowledge.Design/methodology/approach – The methodology presented in the work is termed the hybrid international matrix with potentials for prioritizing simple and complex numbers of maintenance activities or items.Findings – The results obtained indicate the feasibility of prioritizing items in maintenance with some improved results in the quality of decision made based on the prioritization.Research limitations/implications – The limitation of the study lies in the fact that a computerized system is needed when the items to be prioritized are many.Practical implications – Practica.
Anomaly States Monitoring of Large-Scale Systems with Intellectual Analysis of System Logs

The article analyzes the paths and algorithms for automating the monitoring of computer system states by means of intellectual analysis of unstructured system log data in order to detect and diagnose abnormal states. This information is necessary for technical support to locate the problem and diagnose it accurately. Because of the ever-growing log size, mining data mining models are used to help developers extract system information. At the first stage, logs are collected with records of system states and information on the execution of processes. At the second stage, the log parser is used to retrieve a group of event templates, with the result that the raw logs are structured. At the third stage, after the logs are parsed into separate patterns, they are additionally represented as numerical vectors of attributes (attributes). The set of all vectors forms a matrix of signs. In the fourth stage, the feature matrix is used to detect anomalies of machine learning methods to determine whether the new incoming log sequence is abnormal or not. A decision tree was used as a classification method for machine learning. Using the example of a distributed HDFS data set, the effectiveness of the considered method for detecting anomalous system states is shown.
Improvement of Telematics Solution for Motor Insurance in Thailand by 5D Innovation Development Process

An insurance company in Thailand developed telematics application since 2017, but the number of its users has declined in 2018. A customer survey showed a low level of customer satisfaction and adoption due to difficulty in its usage and low perception of usefulness. Thus, this paper aims to explore the customer requirements and provide the improved version of the telematics application by using the 5D innovation development process (Discover, Define, Design, Develop, and Deploy). In the Discover Phase, the technology acceptance model (TAM) survey and a satisfaction questionnaire regarding hidden customer requirements were conducted. The project charter was used to define and summarize the steps of the management scope and the project timeframe. Quality Function Deployment (QFD) and TAM were adapted in the Design Phase, and then all concepts were developed and improved by Pugh Matrix, Weighted Sum Score and customer expectations were translated into product specifications. The Develop Process was to create the prototype demo of the application in order to verify the developing guideline before scaling up. Finally, the feedback from the testing users ensured the effective commercialization of the new version of the telematics application in the Deploy Phase. The newly developed telematics application shows a higher level of customer satisfaction from 3.01 to 4.05. Moreover, the perceived usefulness, perceived ease of use, attitude toward using, and intention to use increased by around 7.27%, 4.62%, 0.43%, 35.09%, respectively. The implication of this research was guidance impediments to overcome user satisfaction and adoption improvement of the Telematics application.
Physiological Reaction as an Objective Measure of Presence in Virtual Environments

Virtual environments (VEs) are one of the most advanced human-computer interface to date. A common measure of the effectiveness of a VE is the amount of presence it evokes in users. Presence is commonly defined as the sense of being there in a VE. In order to study the effect that technological improvements such as higher frame rate, more visual realism, and lower lag have on presence, we must be able to measure it. There has been much debate about the best way to measure presence, and we, as presence researchers, have yearned for a measure that is: (1) Reliable—produces repeatable results, both from trial to trial on the same subject and across subjects; (2) Valid—measures subjective presence, or at least correlates well with established subjective presence measures; (3) Sensitive—is capable of distinguishing multiple levels of presence; and (4) Objective—is well shielded from both subject bias and experimenter bias. We hypothesize that to the degree that a VE seems real, it will evoke physiological responses similar to those evoked by the corresponding real environment, and that greater presence will evoke a greater response. Hence, these responses serve as reliable, valid, sensitive, and objective measures of presence. We conducted three experiments that support the use of physiological reaction as a reliable, valid, sensitive, and objective measure of presence. We found that change in heart rate was the most sensitive of the physiological measures (and was more sensitive than most of the self-reported measures) and correlated best among the physiological measures with the reported presence measures. Additionally, our findings showed that passive haptics and fame rate are important for evoking presence in VEs. Inclusions of the 1.5-inch wooden ledge into the virtual environment significantly increased presence. Also, for presence evoked: 30 FPS (frames per second) > 20 FPS > 15 FPS. In conclusion, physiological reaction can be used as a reliable, valid, sensitive, and objective measure of presence in stress-inducing virtual environments.
Dynamically Based Motor Parameters for Delta Robots Using the Specified Workspace

Delta robot system is a complex dynamical system with severe nonlinearity and complex coupling relationship between multi-link and multi-joint. The existing analytical methods are Lagrange’s method, Newton-Euler method, Gaussian method and Kane method. Each method inevitably has some problems, in order to be able to complete and accurate calculation of the robot in the specified workspace of motor parameter problem. We use the Dynamics simulation method to set the limit motion point, that is, using SolidWorks 3D modeling, using the “motion” analysis in the Solid Works tool to simulate, the “motion” analysis will accurately describe the robot motion process, including three rotary servo motor, motor torque, angular velocity, angular acceleration and many other parameters. This paper use FANUC Robot M-2iA to verify the result of experiment. ROBOGUIDE is also used. Select the corresponding parameters of the motor, will obtain the most suitable motor, Delta robot to meet the specified work space in the maximum work efficiency.
A practical development of the suspender device that controls load rotation by gyroscopic Moments

In the transportation of construction material using tower cranes, the hanging loads are frequently rotated by external disturbances. This lowers the efficiency and the safety of this kind of work. For the purpose of reducing load rotation and dangerous works, a suspender device activated by a gyroscope has been developed This device controls load rotation via two different modes of the gyroscopic moment. In the active control mode, the load turns in high response to commands issued by the controller and can be correctly set in position at the desired angle. In the passive control mode, the load can be kept in position regardless of crane movement or outer disturbance. As a result of applying the suspender device to construction work, the cycle time for load transporting is effectively reduced and shortening of construction period is carried out. The operations are preciously regulated by wireless remote control, and dangerous manipulation works are drastically reduced This device generates no noise and guarantees a comfortable and safe construction environment.
Estimation of Human Movement State by Smartphone Sensor Information without GPS

We developed a smartphone application for estimating movement states with an acceleration sensor, a magnetic sensor, and an electric wave strength. Life-log management system is also implemented in a Web application as an example of utilizing the results obtained by our estimating system. The verification results confirm that the system can estimate the movement states with high accuracy regardless of the users and models. All the train stations that were part of the user's course in the experiment were recognized by the system and obtained in the Web application. These results suggest that a detailed life log can be generated by our proposed system.
Stability analysis of bidirectional adaptive cruise control with asymmetric information flow

Stability and the string stability of a platoon of adaptive cruise control (ACC) vehicles using a constant spacing are investigated. Due to realistic design and execution, negative effect of tracking lag parameter on the stability is examined. An efficient analytical approach is presented in order to obtain a sufficient stability condition in the domain of the control parameters. The stability criterion is examined using a partial differential equation (PDE) approximation using large number of vehicles subjected to the time lags in vehicle dynamics and heterogeneity in the control laws, which allows asymmetry in the use of front and back information. The string stability analysis is performed to evaluate the disturbance attenuation. Finally, an example of multiple vehicle platoon control is presented, which demonstrates the effectiveness and the robustness of the proposed method.
IMAGE STABILIZATION PERFORMANCE OPTIMIZATION USING AN OPTICAL REFERENCE GYROSCOPE

Abstract : An optical reference gyroscope (ORG) provides an inertially stabilized collimated optical reference beam, which, in conjunction with a fast steering mirror (FSM), allows for closed-loop control image stabilization. Feedback-control permits attenuation in the image space of base motion disturbances which would tend to distort and shift the image at the focal plane. Transfer function derivations for the components and system yield the detector and image error equations. A numerical parametric study of the compensator design seeks to minimize the image error, taking into account ORG noise, base motion power spectra and ORG base-to-rotor coupling effects. A Fourier spectrum analysis of the remaining image error helps to predict the contributions to scene shift and distortion at the focal plane and the resulting image quality degradation at the charged-coupled-device imager. Analytical results are compared with test results.
Using Parallel Platforms as Climbing Robots

Primates are the living beings with a greater capacity of manipulation. This skill derives from they have two legs equipped with elements adapted to the manipulation and grasping. The simultaneous use of both legs and arms confer to these living beings their special features to manipulate and manage different objects. As many technical developments inspired when nature laws are observed, parallel robots are conceived in a similar way. In this way, the mechanical structure of a parallel robot is composed by a closed chain in which the end effector is linked to the basis at least by two independent kinematic chains.This definition can be in conflict with the developments about coordinated robots that also constitute closed kinematic chains. Parallel robots simplify these chains in such a way that every one has only one actuator. So, the complexity of the mechanism can be reduced and it is possible to make good use of the energy provided by the actuators to obtain a higher payload capacity or to increase the speed of movement of the end effector. The first theoretical works on mechanical parallel structures appear long time ago, even before the notion of robot. In this way the first parallel mechanism was patented in 1931 (US Patent No 1789680) and was designed by James E. Gwinnett (Gwinnett 1931). In 1940 Willard Pollard presented a robot with 5 degrees of freedom dedicated to painting tasks. The robot was composed of three legs of two links each one. The three actuators of the base drive the position of the tool.However, other more significant parallel mechanisms have been achieved from then. In this way, in 1947 Eric Gough designed the most popular parallel platform. Nowadays numerous platforms can be found with the name of MAST (Multi-Axis Simulation Table). In 1965, Mr. Stewart (Stewart, 1965) described a movement platform of 6 degrees of freedom (dof) designed to use as a flight simulator. On the contrary to the general belief the Stewart mechanism is different to the previously presented by Gough. The work presented by Stewart had and have a great influence in the academic world, and it is considered one of the first works of analysis of parallel structures. At the same time, Klaus Cappel carried out in the Franklin Institute Research Laboratory a lot of researches with parallel platforms of 6 degrees of freedom. In 1967 Cappel patented a motion simulator based on a hexapod (Cappel, 1967). Later, in 1978 Hunt (Hunt 1978) suggested that the mechanisms of the flight simulators can be used as parallel robots. Also Hunt pointed out that parallel robots required a more detailed study in the context of robotic applications due to the advantages of accuracy and rigidity of these platforms.
Electronic Commerce: Concepts, Methodologies, Tools and Applications

The electronic commerce environment has evolved so rapidly that it is difficult for even seasoned professionals in IT, management, and other affected disciplines to keep up with the pace of change and to comprehend the full range of opportunities and challenges these emerging technologies present. Electronic Commerce: Concepts, Methodologies, Tools and Applications compiles a critical mass of top research nearly 300 chapters from upwards of 400 of the worlds leading experts to provide libraries with a landmark, four-volume reference to meet research needs in the many disciplines impacted by these far-reaching topics. The comprehensive range of covered topics includes mobile commerce, virtual enterprises, business-to-business applications, Web services, and enterprise methodologies.
Learning about migration through experiments

International migration is one of the most important choices that individuals and households in poor countries can make to increase their lifetime wellbeing. This choice presents a severe challenge to researchers attempting to learn the impacts of migration, since those who choose to move typically differ in a host of observable and unobservable ways from those who choose to stay behind. This paper provides an overview of a new experimental literature which uses policy experiments and researcher-designed experiments to overcome these selection issues. Particular emphasis is placed on discussing the different datagathering strategies needed for conducing policy experiments. Experimental migration research as a field is still in its nascent stages, and there appears to be plenty of scope for both policymakers and researchers to design new experiments going forward â€“ it is hoped that the summary here will aid researchers and policymakers in this purpose.
The generics of business interaction - emphasizing dynamic features through the BAT model

There is a growing complexity in business interaction. Today there exist several models for studying business interaction. There are such models founded in the language action tradition and these models have shown to be fruitful. Existing models are however not comprehensive enough. In this paper we will develop a generic model, which is one step towards a more comprehensive model than the existing ones. This model, which takes the BAT model as starting point, will acknowledge different contractual levels as well as distinguishing between market and dyadic business interaction. Important characteristics of this new generic model are dynamic features such as dynamic capabilities, dynamic business relations as well as recurrent business transactions.
Synthesis of high-performance analog cells in ASTRX/OBLX

In contrast to digital ASIC design, design automation tools for the analog portions of mixed-signal ASICs are largely nonexistent: most analog circuitry is still designed by hand. Synthesis of analog cells promises an enticing alternative: fully automatic translation from an un-sized circuit topology to a sized circuit that meets user supplied performance specifications. We present a new synthesis strategy that can automate fully the path from a circuit topology and performance specifications to a sized circuit schematic. This strategy relies on asymptotic waveform evaluation to predict circuit performance and simulated annealing to solve a novel unconstrained optimization formulation of the circuit synthesis problem. We have implemented this strategy in a pair of tools called ASTRX and OBLX. ASTRX is a circuit compiler that generates a performance prediction module that maps the component and voltage values in the circuit to the performance metrics specified by the user. More exactly, ASTRX generates code that implements a cost function that is carefully constructed so that its minimum value occurs at a circuit design that best meets the input specifications. This cost function code is then compiled and linked to OBLX, which uses simulated annealing to solve numerically for its minimum, thereby designing the circuit. To show the generality of our new approach, we have used this system to re-synthesize essentially all the analog synthesis benchmarks published in the past decade; ASTRX/OBLX has re-synthesized circuits in an afternoon that, for some prior approaches, had required months. To show the viability of the approach on difficult circuits, we have re-synthesized a recently published (and patented), high-performance operational amplifier; ASTRX/OBLX achieved performance comparable to the expert manual design. And finally, to test the limits of the approach on industrial-sized problems, we have synthesized the component cells of a pipelined A/D converter; ASTRX/OBLX successfully generated cells 2X-3X more complex than any published to date.
Intrusion Detection And Prevention System: SQL- Injection Att acks

Personally identifiable information (PII) is information regarding things such as bank accounts, retirement or stock investment accounts, credit card accounts, medical records, or insurance claims. There is a need to protect the PII in databases that are connected to the ubiquitous, global network that is the Internet. If there is any vulnerability in the protection in a system that holds PII, then it presents an opportunity for an unauthorized person to access this PII. One of the techniques available to would-be information thieves is SQL injection (SQL-I). In this project, a system is developed to analyze the values submitted by users through HTML forms and look for possible attack patterns. Once the system finds such a pattern, it blocks the attack and makes a record of the activity. If an attacker continues to pass such attack patterns, the system blocks access by this user altogether. A mechanism is included to block users who attempt to log in at an abnormally high rate. This provides a combination of pattern-based detection and anomaly-based detection to create a reasonably robust intrusion detection system, with respect to SQL-I attacks.
Computation of Fields from a Magnetic Dipole in a Conductive Medium Using the QS-DGTD Method

Loop antennas are often used for field generation in low-frequency electromagnetic applications. Since the antenna dimensions are much smaller than the wavelength, the antenna can accurately be replaced by its equivalent magnetic dipole model in simulations. In this paper, low-frequency magnetic dipole radiation fields in a conductive medium are computed using a three-dimensional discontinuous Galerkin Time-Domain (DGTD) scheme. It is shown that this computation can be accelerated using a material scaling scheme under Quasi-Static (QS) approximation, i.e., time step size can be scaled up without sacrificing from the accuracy and the stability of the time marching scheme. Radiated fields from a magnetic dipole in a conductive medium computed by this accelerated scheme are compared to those obtained using analytical expressions. Results are in good agreement.
A Study of Advanced Semiconductor Switch Physics and Technology

Abstract : Russian ultra-fast, solid state switch technology was investigated in this study. Drift step recovery diodes (DSRDs) with silicon avalanche shapers (SASs) were experimentally examined. In addition, the SAS was studied using device-level modeling. The experiments and model results were compared with each other and with the Russian theory of operation. This research demonstrated that the Russian theory of the SAS was inconsistent with the operational behavior and circuit simulation. The SAS operates in a manner more consistent with a TRAPATT (TRApped Plasma Avalanche Triggered Transit) device. A simple circuit used to test the DSRD and SAS device is presented. Lifetime test results and switching voltage waveforms are discussed and evaluated. An optimum design for the SAS is offered based upon the theory of operation and code simulations. The University of New Mexico's drift diffusion furnace was used to construct a series of avalanche shapers similar in behavior to the Russian SAS. The results of this effort, including experimental data, are presented. Finally, a variety of commercialization opportunities for this fast semiconductor switch technology is offered.
Stability of multisoliton solutions in dispersion management with fiber Bragg gratings

The formation of fibre Bragg grating dispersion-managed multisolitons depends on the presence of asymmetric terms in the transfer function of the chirped fibre gratings employed. Given this dependence on higher order terms, it seems clear that the influence of third order dispersion in the fibre link must be important. We study the tolerance of fiber Bragg grating dispersion managed multisolitons to the presence of third order dispersion in the fibre link. On the other hand, the transfer function of a fibre Bragg grating is sensible to its operating conditions, such as pressure and temperature, as well as being subject to experimental indetermination in their manufacture. We study the robustness of multisoliton solutions to the effect of pseudo-random variations in the gratings' parameters.