Miracle-dz/UniFAR-FTUs huggingface dataset:
CPW‐fed flower‐shaped patch antenna for broadband applications

In this article, the simulation and experimental studies on a novel compact and broadband coplanar waveguide (CPW)‐fed flower‐shaped microstrip patch antenna are reported. The proposed flower‐shaped patch is a modified version of circular patch. Although the proposed antenna has largest radius (= 12.5 mm) equal to the radius of a circular patch, it provides much wider impedance bandwidth and lower first resonant frequency as compared with the CPW‐fed circular patch antenna. The flower‐shaped patch itself is capable of providing good impedance match with the CPW feed without any modification of feed line and ground plane. The simulated input and radiation characteristics of the proposed antenna are compared with the corresponding experimental characteristics over the operating frequency range. The simulated and experimental input VSWR bandwidth (VSWR ≤ 2) of antenna are found to be 4.59:1 (2.2–10.1 GHz) and 4.81:1 (2.2–10.6 GHz), respectively. The antenna provides bidirectional and omnidirectional patterns in E‐ and H‐planes, respectively, along with average gain value of 3.89 dB and good radiation efficiency (more than 75%) over whole operating frequency range. Time domain behavior of the antenna is also analyzed along with system fidelity factor and group delay. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:2908–2913, 2015
The impact of real estate allocation on investors’ ability to generate real income

ABSTRACT Endowments, wealthy families and retired individuals are often concerned, first and foremost, about preserving their wealth or avoiding the possibility of depleted funds during their lifetime. This paper examines the extent to which a variety of real estate asset types, in addition to a traditional stocks and bonds allocation, can help preserve wealth or avoid a financial shortfall event subject to periodic withdrawals over an extended time period. Using a Monte Carlo Simulation technique, we analyse the resiliency of eight different real estate investment vehicles as a rule of thumb of a 4% annual withdrawal. Our results show that some – in most cases meaningful – portfolio allocation to each of these investment vehicles reduces the chance of a financial shortfall over long-term horizons of 30 or 50 years. Similarly, when wealth preservation is desired, allocation to each of these investment vehicles increases investors’ wealth preservation probability. Overall, it appears that equity REITs provide the greatest benefit to the portfolio compared with other real estate investment vehicles. These findings support portfolio allocation into real estate vehicles for investors that seek to preserve wealth or avoid financial ruin.
Promoting Storytelling in Enhancing Health Vocational Students’ Speaking Achievement

Soft skills development requires the use of education media and forums. While storytelling may be used in competitions, media classes do not use it as a teaching media. Storytelling in the classroom hasn't been used to its fullest potential. English language proficiency can be improved through the use of digital storytelling, specifically on YouTube, by students. The study is intended to achieve similarities and discrepancies in the importance of the English-language achievement with general English and the implementation of digital storytelling. This study may be graded as an experimental investigation and classroom action research. This study employed cross-sectional research with independent speaking pre-test and post-test for experimental and control group design. Talking with storytelling therapy triggering different strategies is advised in experimental classes. It uses intervention research to change people's "talking," "doing" and "related practices". For the control group data combined with T-tests findings, a value of 0.417 has been achieved with an average value of -10.97436. In achieving speaking test outcomes, one may interpret that the treatment group has a more important meaning than the control group. The outcome of this study show that storytelling learning can help students at vocational health Level 2, more than the general English learning, achieve the high speaking achievement. Keywords: Promoting Storytelling, Speaking Achievement, Speaking Skill
Research Note: The Influence of Surface Preparation on Machining Forces and Chip Geometry

In machining practice, repeated passes result in the presentation of pre-strained material to the cutting edge. The effect of such strains on machining forces and chip geometry is investigated in a series of machining experiments performed on α-brass using a variety of cutting conditions. It is found that both thrust force and chip side spread depend on surface preparation, but cutting force and chip length ratio are not significantly affected by surface preparation under the conditions of the experiments. Surface preparation is also found to affect the scatter of results.
Civil and Geomatic Engineering Students' Communication Pattern at Survey Camp

This study investigates the communication pattern among civil and geomatic engineering students' during survey camp conducted at Lumut, Perak, Malaysia. This study also discusses the content of students' communication among peers and groups. The samples consist of 80 civil and geomatic engineering students from Kuala Lumpur Infrastructure University College. The samples were divided in groups and each group were given a task in remapping the area. The tasks involved engineering surveying techniques via levelling, traversing and detailing by tacheometry. The tasks were carried out in 10 days from 8am till 6pm. The interactions were taped and analysed accordingly. Selected extracts from the interactions were analysed and discussed by using the discourse analysis method. The findings showed that although there were difficulties in communication when handling the task given but towards the end the subjects' were able to fulfill the tasks. Students were able to communicate diligently among peers or groups. It is hoped that during survey camp, communication among peers and group would be the major priority in order to succeed in the tasks given.
THE EFFECT OF THE RISK MANAGEMENT IMPLEMENTATION ON STOCK RETURNS IN THE BANKING INDUSTRY LISTED ON THE INDONESIA STOCK EXCHANGE 2016-2019 PERIOD

The aim of this research was to determine the conditions of the application of risk management for commercial banks in Indonesia and to determine the effect of the application of risk management on banking stock price returns based on model 1, model 2, model 3 and determine the best model for stock price return estimation. In measuring the level of risk management implementation in banking, two approaches are used, namely trend analysis and empirical analysis. The following conclusions can be drawn: (1) In model 1, trends The movement of the NETIM variable in one year from period one (March) to period four (December) always goes up and down at the beginning of the year. next. The NONIM variable, the movement in the quarterly period at the beginning tends to be flat, starting to rise in the December 2016 period, while the movement from year to year is not very volatile. (2) In model 2, the trend of the movement of the AVERAGE variable during the 2016-2019 period tends to increase as indicated by the trend line . (3) In model 3, trends The movement of the PRIN1 and PRIN2 variables from year to year during the study period seems to fluctuate (4) Based on the results of the comparison of the four regression estimation models, it can be concluded that the first model is the best model in explain the variation of the movement of the return variable.
Information Filtering in Electronic Networks of Practice: An fMRI Investigation of Expectation (Dis)confirmation

Online forums sponsored by electronic networks of practice (ENPs) have become an important platform for technology-mediated knowledge exchange, yet relatively little is known about how ENP participants filter and evaluate the information they encounter on these forums. This study integrates perspectives from expectation confirmation theory, prospect theory, and neuroscience research to explore how ENP forum filtering judgments are influenced when expectations formed on the basis of contextual cues are confirmed or disconfirmed by the examination of solution quality. We summarize six different models of expectation confirmation explored in previous IS literature and report the results of a neuroimaging experiment using functional MRI (fMRI) that paired both positive and negative contextual cues with high-and low-quality solutions on a mock ENP forum interface. Results show that evaluation judgments are strongest in conditions where initial contextual cue judgments are confirmed by examination of solution quality except when the perceived expectation-experience gap is large, providing evidence for an assimilation-contrast model of expectation confirmation. We also found neural activation differences for expectation confirmation vs. disconfirmation and, consistent with prospect theory, differences in filtering behaviors with respect to unexpected gains vs. unexpected losses.
The development and property research on reflective intensity modulation fiber optic acoustic sensor

In order to improve the overall performance of reflective intensity modulation fiber optic acoustic sensor, the fiber-optic sensing probe was optimizing designed. Through constructing experimental platform, the sensitivity and frequency characteristics of the sensor were tested. The experimental results suggest that the sensor's sensitivity is found to be 550mV/Pa, and the measurement range lies within 50Hz ~ 10000Hz, which meets the requirements of the project indicators. Meanwhile experimental results show that the structure of fiber-optic sensing probe is simple reasonable designed and has strong practicability.
Investigations of the effects of array elements spacing on the performance of Rotman type multiple beam forming network

A modified approach to design a Rotman type multiple beam forming network is proposed. The lens design using the proposed approach is analyzed using the contour integral approach. Z-matrix and then S-parameters for the multiport model of the lens have been evaluated. The S-matrix yields voltage distribution at the array elements. Using the voltage distribution, the radiation pattern for the antenna array has been computed. Effects of antenna element spacing on the performance of the network have been investigated.
The business intelligence in the moroccan industrial companies

The main goal of this work is to understand the use of environmental scanning by senior managers in the context of the Moroccan pharmaceutical industry. This work also makes it possible to compare our hypotheses of research with the reality of the Moroccan ground. Our results showed that competitors is the main variable impacting the perception of uncertainty in the top manager and pushes him to increase his monitoring frequency based mainly on external and personal sources. On a methodological level, we mobilized a hybrid exploratory approach, based on 13 guided interviews with senior managers operating in the Moroccan pharmaceutical industry.
SIMULATION OF THE HIP MUSCLES KINEMATICS DURING GAIT USING HIGHLY DISCRETISED ANATOMICAL MODELS

The use of medical images for personalising computational models of the lower limbs is becoming a feasible approach in applications requiring accurate anatomical representations of the musculoskeletal (MSK) system, e.g. prediction of surgery outcome. Semi-automated procedures have been proposed for creating personalised MSK models, however the definition of the muscular anatomy (attachments and lines of action) has mostly relied on manual registration of existing models based on bone morphology, e.g. [1]. In this work we propose a fully automated technique for generating muscle lines of action (also called “fibres” in the following) from muscle geometries obtained from in vivo datasets and we apply it to a kinematic simulation of walking.
Estimation of Erositivity Using an Impact Disdrometer in East of Alagoas

Rainfall is one of the most active forces that cause soil erosion. The action of rain on the soil exerts an erosive power caused by the impact of the drops, which fall with variable speed and kinetic energy, depending directly on the diameter of the drop. The objective of this study is to determine algorithms capable of estimating rainfall erosivity for the region of Maceió-AL. For this purpose, erosion rains were collected between 2003 and 2006 using a RD-69 disdrometer, which continuously and automatically measures rainfall distribution in a range of 1 min. The determination of algorithms in the form of power equation to estimate was adjusted with one and two independent variables (amount of rainfall, duration and maximum intensity).
High Power Windows at DESY Operation Experiences, Development Work on TTF Input Couplers

There are many different types of rf high power couplers operated in the various existing accelerators at DESY. However the main effort of coupler development is actually done at the TTF activity. Consequently this report concentrates on TTF input couplers. The TESLA project needs for it's superconducting cavities input couplers with unusual features besides high performance and very high reliability. Reliability is a strict requirement because partial or complete exchange of a coupler after installation to a cryomodule might imply disassembling of more or less a whole module and danger of contamination to the cavities. In reference to this both coupler types which were developed for the first TTF module are considered as prototypes. First experiences with these couplers and hrther development work will be reported here.
Towards the Standard Quantum Limit in a Table-Top Interferometer

We discuss the development and expected performance of a table-top experiment for measuring quantum ﬂuctuations in a suspended-test-mass interferometer. The ultimate goal of this experiment is to perform measurements of the quantum noise-limited displacement sensitivity of the interferometer at the level of the standard quantum limit (5 × 10 − 19 m/ √ Hz at 100 Hz). The case is made for an experiment that will show the feasibility of preparing a macroscopic quantum-limited system within a regular laboratory environment. This will be achieved by suspending a cryogenically cooled, high-ﬁnesse, optical cavity via a multi-stage suspension. We motivate the utility of our experiment in providing an increased understanding of the nature of quantum ﬂuctuations in current and future gravitational wave detectors, as well as opening an avenue for research into aspects of macroscopic quantum mechanics and quantum gravity. We explain how these requirements drove our design speciﬁcation. Given the extremely small displacements in question, particular attention is devoted to discussing noise mitigation, with a focus on the suppression of seismic and thermal noise.
Harmonic and reactive power compensation as ancillary services in inverter-based distributed generation

The introduction of distributed generation, DG, into low-voltage (LV) networks opens up the possibility of supplying ancillary services to aid network management and to maintain power quality. DG itself can cause voltage magnitude difficulties when injecting real power into networks with high R/X ratios, but control of reactive power injection can help overcome this. Continuous control and support only at the voltage limit conditions (to avoid unnecessary reactive power flows in normal conditions) are explored. Relatively high-impedance LV networks are prone to harmonic distortion from nonlinear loads. A variety of control methods that emphasise either harmonic-line flows or local-voltage distortion are examined, and a compromise method based on resistance emulation is shown to be effective. Experimental results from a single-phase laboratory network and 2 kVA inverter are used to illustrate how these additional control functions can be integrated into the existing control scheme for real-power management. Decomposition of observed voltages and currents into harmonic terms that are phasesynchronised to the grid voltage is a challenge in real-time systems. Kalman observers are used to achieve this with an additional advantage of avoiding explicit phase-locking while producing quadrature components useful in instantaneous calculation of reactive power and in providing feed-forward compensation terms
Baseline-free guided wave imaging via adaptive source removal

Structural health monitoring systems employing in situ guided wave transducers are being considered for civil, mechanical, and aerospace applications. In particular, guided wave-based imaging methods have been applied to graphically depict the area of interest and localize the damage. Most existing imaging techniques have relied on scattered waves extracted by baseline subtraction to quantify the effects of damage on the guided waves. In many cases, however, baseline data may not have been recorded or may be ineffective for baseline subtraction because of uncompensated variations between baseline and in-service signals. Proposed here is an alternative approach whereby source signals are first adaptively estimated from the in-service signals, direct arrivals are then calculated by forward propagation, and scattered signals are obtained by subtraction of the direct arrivals. Images using these scattered signals can then be created by, for example, delay-and-sum methods. This approach is demonstrated using synthetic signals generated by ray tracing and conventional delay-and-sum imaging. Its feasibility is further demonstrated with experimental data recorded on an aluminum plate using a single in situ transducer as a source and a laser vibrometer to record guided signals around the periphery of the region of interest.
Design for autonomous mission planning system

Because of indeterminateness of the environment and delay of the communication, deep space spacecraft is required to be autonomous. Planning technology is studied in order to realize the spacecraft autonomy. First, a multi‐agent planning system (MAPS) based on temporal constraint satisfaction is proposed for concurrency and distribution of spacecraft system. Second, timeline concept is used to describe simultaneous activity, continue time, resource and temporal constraints. Third, for every planning agent in the MAPS, its layered architecture is designed and planning algorithm based on the temporal constraint satisfaction is given in detail. Finally, taking some key subsystems of deep space explorer as an example, the prototype system of MAPS is implemented. The results show that with the communication and cooperation of the planning agents, the MAPS is able to produce complete plan for explorer mission quickly under the complex constraints of time and resource.
Topological considerations on the symmetrical components transformation

This paper presents the well-known symmetrical components transformation (SCT) by means of a different approach from the traditional matrix analysis: a topological lecture provides, in fact, the results obtained by the existing analysis in a more suitable form for network applications. This approach leaves more space to the intuitive analysis, simplifying the application of such a method for teaching purposes, and completing the traditional mathematical view. Moreover, the use of graph concept allows the unified analysis of unbalanced faults leading the matter to the general theory of balanced three-phase systems. Typical for the physical balanced networks, the real convenience of SCT is also confirmed from the topological point of view, even for the fault analysis.
Analysis of Dead Time and Implementation of Smith Predictor Compensation in Tracking Servo Systems for Small Unmanned Aerial Vehicles

Abstract : Recent advances in technology have allowed for Small Unmanned Aerial Vehicles (SUAVs) to employ miniaturized smart payloads such as gimbaled cameras, deployable mechanisms, and network sensors. Gimbaled video camera systems, designed at NPS, use two servo actuators to command line of sight orientation via serial controller while tracking a target and is termed Visual Based Target Tracking (VBTT). Several Tactical Network Topology (TNT) experiments have shown high value of this new payload but also revealed inherent delays that exist between command and actuation of the pan-tilt servo actuators controlling the camera. Preliminary analysis shows that these delays are due to a communication lag between the ground control station and the onboard serial controller, a data processing delay within that controller, and the mechanical delays of the gimbal. This thesis applies system identification techniques to the servo controller system and considers the implementation of a Smith Predictor into the camera control algorithm in order to reduce the overall effect of the lag on the system performance.
Distribution Manner of Compaction Circular Cylinders in Through-Active-Mask Electrochemical Machining

Electrochemical machining is widely used in the processing of difficult-to-machine metal materials. And through-mask electrochemical machining is a very important technology in the processing array structure of difficult-to-cut metal materials. Traditional through-mask electrochemical machining always uses a photoresist as the mask. The production process of a mask is complicated, and the mask cannot be reused. In this paper, through-active-mask electrochemical machining to process array structure in difficult-to-machine metal materials was investigated. Compared with traditional electrochemical machining masks, a copper-clad laminate is used to make the mask by mechanical machining in through-active-mask electrochemical machining. Also, the mask does not stick together with the workpiece but covers the workpiece by mechanical compaction, so the mask can be reused. In order to ensure the mask is in close contact with the workpiece, we need to arrange many compaction circular cylinders within the flow channel. The influences on electrolyte flow of compaction circular cylinders were investigated. The distribution of the compaction circular cylinders affects the electrolyte flow state, thereby affecting the processing. By analyzing the electrolyte flow state for the different distributions of compaction circular cylinders, one can find the best distribution of compaction circular cylinders for the required processing.
Optimal buffer inventory and preventive maintenance for an imperfect production process

In this paper we present a model to determine the optimal length of continuous production periods between maintenance actions and the optimal buffer inventory to satisfy demand during preventive maintenance or repair of a manufacturing facility. We include in the model the possibility of imperfect production. We consider that the duration and cost of the maintenance action depend on the state of the production facility.
Hyperspectral imaging in a LabVIEW environment

Hyperspectral imaging has traditionally required sophisticated software and powerful computers. In this paper, we describe an elegant PC-based system that maps multiple fluorescent signatures simultaneously. We present color image examples of the spectral topography of biological materials that exhibit as many as 40 distinct spectral fingerprints. Acquisitions and data processing occur close to real time. Unique coding simplifies memory management and data storage functions and provides accelerated image retrieval and interpretation.