Miracle-dz/UniFAR-FTUs huggingface dataset:
A conductivity-based interface tracking method for microfluidic application

A novel conductivity-based interface tracking method is developed for ‘lab-on-a-chip’ applications to measure the velocity of the liquid–gas boundary during the filling process. This interface tracking system consists of two basic components: a fluidic circuit and an electronic circuit. The fluidic circuit is composed of a microchannel network where a number of very thin electrodes are placed in the flow path to detect the location of the liquid–gas interface in order to quantify the speed of a traveling liquid front. The electronic circuit is placed on a microelectronic chip that works as a logical switch. This interface tracking method is used to evaluate the performance of planar electrokinetic micropumps formed on a hybrid poly-di-methyl-siloxane (PDMS)-glass platform. In this study, the thickness of the planar micropump is set to be 10 µm, while the externally applied electric field is ranged from 100 V mm−1 to 200 V mm−1. For a particular geometric and electrokinetic condition, repeatable flow results are obtained from the speed of the liquid–gas interface. Flow results obtained from this interface tracking method are compared to those of other existing flow measuring techniques. The maximum error of this interface tracking sensor is less than 5%, even in an ultra low flow velocity.
Identification of effective factors and components of cognitive readiness of university presidents from the perspective of cognitive science and higher education experts

1. PhD in Higher Education Management, Faculty of Psychology and Educational Sciences, Department of Management and Educational Planning, Tehran University, Tehran, Iran 2. Professor of Faculty of Psychology and Educational Sciences, Department of Management and Educational Planning, Tehran University, Tehran, Iran 3. Assistant Professor of Faculty of Psychology and Educational Sciences, Department of Management and Educational Planning, Tehran University, Tehran, Iran
Evaluation of perturb and observe MPPT algorithm implementation techniques

Because of its simplicity and ease of implementation, the perturb and observe (P&O) algorithm is the most commonly applied maximum power point tracking (MPPT) control scheme in photovoltaic (PV) applications. Two techniques are usually used for implementing the P&O algorithm: reference voltage perturbation where a reference value for the PV generator output voltage is used as the control parameter and direct duty ratio perturbation where the duty ratio of the MPPT converter is used directly as the control parameter. This paper presents an experimental comparison between these two techniques when used in a photovoltaic system feeding a resistive load. The influence of the step size and the speed at which the control parameter is perturbed is investigated. The various advantages and drawbacks of each technique are identified and energy utilization efficiency is calculated for different weather conditions. Practical results obtained using a 540Wp PV experimental setup show very good agreement with numerical simulations. (6 pages)
ANALISIS DAN EVALUASI SALURAN DRAINASE PADA KAWASAN PERUMNAS TALANG KELAPA DI SUB DAS LAMBIDARO KOTA PALEMBANG

Drainage system is a set of activities that form the effort to drain water whether it is runoff or underground water from an area or region. The purpose for this report is to analyze and evaluate the drainage channels in Perumnas Talang Kelapa Palembang. In the implementation of this report, the short-term rainfall data from 2001 to 2012 was used. The rainfall data was tested according to normal, log normal, log pearson III, and gumbel distribution. Select one result of those distribution with the smallest deviation standard. Then, it must be tested with the smirnov-kolmogorov test to find the rain intensity equation. That equation will be used to find the to plan the drainageÂ dimension. To analyze the incapacitated drainage, this report will use SWMM program. From the amount of 51 conduits in the SWMM model, there are 24 incapacitated conduits. To fix the conduits, the rational method will be used. Â Keyword : Drainage planning, standard of deviation, SWMM
Study on CCD photoelectric thickness measurement instrument and system

In this paper, optical trigonometry measurement principle and wok principle of linear CCD are introduced, which are based on to design optical focusing and imagery system with He-Ne laser instrument as illuminant. peripheral circuit of linear CCD is designed in theory and experiment. non-contact thickness measurement instrument is constructed, using CCD as photoelectric transformation element and microprocessor as the controller. The principle of measurement system is inclined trigonometry measurement principle and CCD is photoelectric transformation element. The time order driving circuit of CCD is designed.
Modeling of Vertical Core-Annular Flows and Application to Heavy Oil Production

The use of core-annular flow pattern may be attractive as an artificial lift method in heavy oil wells. This flow pattern can be induced by the lateral injection of relatively small quantities of water, in order to get a lubricated oil core along the pipe. Frictional pressure drop measurements for upward vertical core flow in a 1-in, pipe, using a 17.6-Pa.s, 963-kg/m 3 oil and water at room temperature reported a decrease by over 1000-fold with respect to single-phase oil flow, being comparable to the flow of water alone in the pipe at mixture flow rate. The total pressure drop was reduced by over 45-fold. The frictional pressure drop model proposed includes both irreversible and buoyancy terms. The model was adjusted to fit our data and shows excellent agreement with laboratory data available.
Perceived attributes and dimensions of accessibility in adapted bathrooms

ABSTRACT This work aims to explore the perceived accessibility of adapted toilets according to the user’s perspective, indicating the relevance of their attributes and features for persons with reduced mobility. There are recent studies addressing accessibility, but few focus on adapted toilets, making this study of adapted toilets in Brazil unique. A total of 98 disabled users with restricted mobility and carers took part in a survey after using adapted toilets. The study sample variance resulted in 27 attributes, distributed in eight factors: accessories, transit ability, access, hydro sanitary facilities, facilities, openings, safety, and ergonomic comfort. Multiple linear regression analysis was applied to identify attributes with impact on general satisfaction. The results identified three primary attributes in terms of design, execution and improvement of the user experience. Findings demonstrate a gap between the recommended standards and what the user perceives to be important, which has ramifications for the further development of standards and the design and construction of adapted toilets. The implication is that it is necessary to pay more attention to what the users need, and thus help to improve the users’ experience, satisfaction and wellbeing.
Recent advances in photoelastic applications

Photoelasticity is one of the oldest methods for experimental stress analysis, but has been overshadowed by the Finite Element Method for engineering applications over the past two/three decades. However, certain new and novel developments and applications have revived the use of photoelasticity. Among them are image processing for fringe analysis, poiarimetric fiber optic sensors, infra-red photoelasticity, low cost dynamic photoelasticity and photoelastic applications in stereolithography. This paper will, after a brief introduction to photoelasticity, highlight some of these advances and developments.
Decision logic of an active braking system for powered two wheelers

Powered two-wheeler (PTW) users are exposed to a high risk of accidents leading to severe injuries and fatalities. The trend of PTW accidents has pointed out the need for an intervention on PTW safety with new and effective solutions. One of the possible answers came from the EC-funded Powered two wheeler Integrated Safety (PISa) project which identified the autonomous braking of the vehicle as one of the most promising safety functions for PTWs. The aim of this paper is to report on the design of the decision logic for deploying a PTW autonomous braking system in case of an imminent collision. Rationales and limitations for this pioneering application are given. The feasibility of the autonomous deceleration is demonstrated by an experimental study conducted with the PISa test bike implementing a prototype of the autonomous braking system, named the Active Braking (AB) system.
Characterization of a Robotic Manipulator for Dynamic Wind Tunnel Applications

Abstract : The newly acquired 6-DOF Motion Test Apparatus (MTA) was installed to perform dynamic wind tunnel testing in the AFIT Low Speed Wind Tunnel. Several complex motions revealed that the overall performance of the test rig needed improvement especially during small motions. The motions exposed that further enhancements would need to be performed individually for each joint. This research e ort focused on the improvement of the MTA wrist roll motor and controller using a pitch oscillation. The controller software was improved using position feedback because the MTA wrist roll motor and controller exhibited reduced signal bias and amplitude attenuation. The enhanced system was then utilized for wind tunnel experiments along with supporting systems. A secondary position and orientation sensor, an Inertial Measurement Unit (IMU), was used to validate the Euler angle output calculated by the MTA Computer using forward kinematics. Four, fast-response pressure transducers were ush-mounted to the wing of the model in order to record aerodynamic data during pitch oscillations. The acquired pressure signals demonstrated signs of unsteady aerodynamic e ects such as dynamic stall. The MTA performed equally well under aerodynamic loads at tunnel speeds of 60 mph, when compared to tests performed with no freestream velocity.
Statistical Relationship between the Parameters of Some Indexed Journals by Fuzzy Linear Regression

In this paper, we propose a statistical relationship between acceptance rate & first decision time of some indexed journals by applying fuzzy linear regression (FLR). We collect the data from two web sources: Elsevier journal finder, and Springer journal suggester. In this problem, we concentrate on the data of the acceptance rate and first decision time. To examine the relationship between these measures, we apply a statistical approach, which is based on correlation and regression analysis. We determine the relative error (RE) of the data collected. We plot the scatter diagram between the two measures. Pearson correlation coefficient (CC) value is also calculated. All this analysis reports that there is a moderate positive correlation between acceptance rate & first decision time.
Prediction of thermally-controlled actuation for shape memory alloy film-based bimorph cantilevers

A model is proposed for predicting the deflection of bimorph cantilevers made of a shape memory alloy film deposited onto solid substrates, by taking into account the changes in the thermal and elastic properties of the film during the martensitic phase transformation. The zero actuation reference temperature is the deposition or annealing temperature, with the film in the austenite phase. On cooling from this point, the thermoelastic stress building up in the bimorph causes bimetal-type behavior until the onset of the austenite–martensite transformation, which now controls the actuation up to its completion, when the bimetal actuation reappears. By adapting the classical bimetal thermostat model to the case when one component undergoes martensitic transformation, the deflection during heating and cooling is calculated by averaging the isostrain and isostress phase distribution bounding approximations; the case of a Ti50.1Ni49. 9 film/Si was examined. Predictions in good agreement with the recorded deflection of a Ti49.2Ni50. 8/Si cantilever (up to a temperature shift explained by composition change and stress developed in the film during the transformation) resulted, indicating a strong effect (attributed to the differences between the elastic and thermal constants of the two phases) of the martensitic phase transformation on the deflection slope and sign.
A superconducting galvanometer

Abstract A superconducting tangent galvanometer suitable for the measurement of thermoelectric voltages in circuits of resistance about 10−7 ohm is described. The inductance has been kept low by the use of only a single turn in each of the deflecting coils, but a high sensitivity has been attained by reducing the controlling field to about 0·01 gauss. The theory of operation of such a galvanometer in circuits of low resistance is discussed; the actual behaviour of the instrument is in satisfactory agreement with the theory. The galvanometer will detect a current of 10−5 A. corresponding to an e.m. f. of 10−12 V.
Fault detection and isolation in current and voltage sensors of doubly-fed induction generators

Abstract A fault detection and isolation (FDI) system for monitoring the stator current and voltage sensors of a doubly-fed induction generator (DFIG) for wind energy applications is presented. The FDI system is based on the model of the balanced three-phase signals, that is used to design a residual generator resting on the so-called Generalized Observer Scheme (GOS). Next, a decision system made of a combination of vector CUSUM (Cumulative Sum) algorithms is used in order to process the residual vector and achieve detection and isolation of incipient additive faults. The approach is validated via simulations of the DFIG controlled by a Linear Quadratic Gaussian (LQG) regulator.
Mobile robot system for the handicapped

The development of an intelligent mobile robot capable of assisting a certain group of the handicapped is presented in this paper. The system consists of three units: a robot, a computer, and a user. All three units communicate completely by remote, using RF signals. The user and robot communicate indirectly through the computer, using natural voice. Each user command is decomposed int a sequence of motion commands, using an object-oriented knowledge base. Robot motion is planned based upon inputs from ultrasonic sensors. The system is capable of learning an unknown, albeit somewhat restricted environment.
A novel particle swarm optimization method based on quantum mechanics computation for thermal economic load dispatch problem

This paper presents an efficient strategy to solve the thermal economic load dispatch (ELD) problem by considering several aspects of ELD. ELD performs an important role in the economical operation of power system, which essentially involves nonlinearity according to the characteristics of the generators. The complexity is amplified when the generators' prohibited zones and valve‐point effect are considered, which makes ELD a nonconvex and nonsmooth problem. The strategy employs a mechanism involving a quantum mechanics‐inspired particle swarm optimization (QMPSO). The conventional PSO is modified by integrating quantum mechanical theory which redefines the particles' positions and velocities in a dynamic manner and therefore explores more search space. The QMPSO employs a multipopulation‐based scheme which ensures particle movement and avoids premature convergence at the same time. Moreover, in order to diversify the particles, a dynamic mutation operator is introduced in the proposed method. Such features deliver a fine balance between the local and global searching abilities. Simulations are carried out by considering several cases of thermal units of varying combinations of system configurations such as with and without the valve point, with and without network loss, and for one or several hours of load demand. The results are quite promising and effective compared with several benchmark methods. © 2012 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.
Resemblance between gap waveguides and hollow waveguides

There is a lack of suitable numerical ports for the gap waveguides. This study studies the resemblance between the ridge/groove gap waveguide and the conventional hollow ridge/rectangular waveguide, respectively, by using numerical analysis. The dispersion diagrams and characteristic impedances are compared and found to be similar within the stopband of the parallel-plate modes. Therefore conventional hollow waveguides can be used as ports in numerical analysis of gap waveguides. In addition, this means that the geometry of circuit components in hollow ridge/rectangular waveguides can be used as a good starting point when designing ridge/groove gap waveguide components.
Carrier phase recovery in optical fiber communication systems using high-order modulation formats

Nowadays, the coherent optical communication system plays an important role in communication field because of large capability and bandwidth. A coherent optical communication, based on high-order modulation and digital signal processing technologies, consists of optical transmitters, optical fiber lines, optical amplifiers and optical receivers. In the high-speed coherent optical communication system, the phase noise from the transmitter laser and the local oscillator laser can significantly degrade the performance of the signal transmission and detection, especially for the systems using high-order modulation format, such as m-ary phase shift keying (mPSK) and m-ary quadrature amplitude modulation (m-QAM). Therefore, investigations on laser phase noise compensation algorithm based on digital signal processing technologies has become more and more significant. In this work, a multi-ring carrier phase recovery algorithm is developed for compensating the laser phase noise in optical fiber communication systems using high-order modulation formats. Degradations on the performance of communication systems due to the laser phase noise have been investigated. The system performance using the proposed algorithm and the conventional Viterbi-Viterbi algorithm were also evaluated in 9-channel and 15- channel, 32-Gbaud, Nyquist-spaced QPSK, 16-QAM, 64-QAM and 256-QAM coherent transmission systems with considering the impact of the laser phase noise. It is found that the phase noise leads to stricter constraints on the linewidths of transmitter-side and receiver-side lasers, and it can greatly degrade the achievable information rates in communication systems. Besides, compared to the conventional Viterbi-Viterbi algorithm, which is usually applied in the QPSK system, our proposed algorithm can also well mitigate the laser phase noise in 16-QAM, 64-QAM and 256-QAM optical communication systems.
Lexical Link Analysis (LLA) Application: Improving Web Service to Defense Acquisition Visibility Environment

Abstract : We have been studying DoD acquisition decision making since 2009. The US DoD acquisition process is extremely complex. There are three key processes that must work in concert to deliver capabilities: determining warfighters requirements and needs; planning the DoD budget, and procuring final products. Each process produces large amounts of information (Big Data). There is a critical need for automation, validation, and discovery to help acquisition professionals, decision makers and researchers understand the important content within large data sets and optimize DoD resources throughout the processes. Lexical Link Analysis (LLA) can help by applying automation to reveal and depictto decision-makersthe correlations, associations, and program gaps across all, or subsets of, acquisition programs examined over many years. This enables strategic understanding of data gaps and potential trends, and can inform managers where areas might be exposed to higher program risk, and how resource and big data management might affect the desired return on investment (ROI) among projects. In this report, we describe new developments in analytics and visualization, how LLA is adaptive to Big Data Architecture and Analytics (BDAA), and reveal needs for Big Acquisition Data used in Defense Acquisition Visibility Environment (DAVE).
Large-scale membrane transfer process: its application to single-crystal-silicon continuous membrane deformable mirror

This paper describes a large-scale membrane transfer process developed for the construction of large-scale membrane devices via the transfer of continuous single-crystal-silicon membranes from one substrate to another. This technique is applied for fabricating a large stroke deformable mirror. A bimorph spring array is used to generate a large air gap between the mirror membrane and the electrode. A 1.9 mm × 1.9 mm × 2 µm single-crystal-silicon membrane is successfully transferred to the electrode substrate by Au–Si eutectic bonding and the subsequent all-dry release process. This process provides an effective approach for transferring a free-standing large continuous single-crystal-silicon to a flexible suspension spring array with a large air gap.
Robot localisation enhanced by a distributed vision system in dynamic environments

Purpose – Image‐based localisation has been widely investigated in mobile robotics. However, traditional image‐based localisation approaches do not work when the environment appearance changes. The purpose of this paper is to propose a new system for image‐based localisation, which enables the approach to work also in highly dynamic environments.Design/methodology/approach – The proposed technique is based on the use of a distributed vision system (DVS) composed of a set of cameras installed in the environment and of a camera mounted on a mobile robot. The localisation of the robot is achieved by comparing the current image grabbed by the robot with the images grabbed, at the same time, by the DVS. Finding the DVS's image, most similar to the robot's image, gives a topological localisation of the robot.Findings – Experiments reported in the paper proved the system to be effective, even exploiting a pre‐existent DVS not designed for this application.Originality/value – Whilst, aware that DVSs, as the one u.
Main results of Sofradir IRFPAs including IRCCD and IRCMOS detectors

Sofradir has developed many MCT IRFPAs using either the 8 to 12 micron spectral band or the 3 to 5 micron spectral band and using different silicon processor technologies to readout these detector arrays. This paper presents an overview of results coming from different types of arrays, (linear array, TDI array, staring array) using CCD or CMOS readout circuits with different types of signal processors.
Screw Auger Power and Throughput Analysis

The modern auger conveyor utilizes a conveying principle that has been known for many years. Throughput capacity and power requirement data for 15 cm (6 in) and smaller diameter screw conveyors are generally available. However screw conveyors for agricultural commodities are now commercially available for sizes up to 35 cm (14 in) diameter. This study determined the capacity, volumetric efficiency, and power requirements for a 20 cm (8 in) and a 25 cm (10 in) diameter conveyor and operating in a speed range of 250 to 1100 rpm at inclination angles of 13, 20, and 30 degrees. The maximum conveyor throughput capacity for all conditions evaluated occurred between 784 and 853 rpm. Volumetric efficiency decreased an average 3% for every 100 rpm increase in conveyor screw speed. Changing the conveyor inclination angle did not affect the volumetric efficiency relative to the screw speed. Power requirements were effected by inclination angle up to 20 degrees and not for inclination angles greater than 20 degrees.