Miracle-dz/UniFAR-FTUs huggingface dataset:
Exploring healthcare governance literature: systematic review and paths for future research

The paper aims to illustrate the stance of existing research on governance in healthcare organizations (hereafter HCOs), in order to appreciate the structure of literature and its evolution. More specifically, thorough a keywords analysis of 91 articles published in 1985-2010 timeframe, the article attempts to understand how setting peculiarities affect the healthcare governance field and to provide some suggestions for future research. The findings enlighten the existence of three main research streams, as well as the absence of a research evolution. The novelty of the paper relies on its contributions for academics by providing a keywords map as a useful tool to understand greatest concentration areas and vice versa never investigated issues whereon focusing future efforts.
Electrostatic simulation methodology for capacitive touch-screen panels

This paper reviews several issues affecting the numerical simulation of capacitive touch screen sensors. The Finite Element Method formulation is adopted, via the commercial solver COMSOL, and used to solve the underlying electrostatic problem. Touch screen panel layouts are briefly described and the main performance metrics identified. The main computational issue identified is the tension between the need for both accuracy and speed. As panels usually comprise a finite array of repeating unit cells a compromise is to only model a smaller array of such cells. A series of numerical experiments are described documenting the effect of changing the number of unit cells retained in the simulation.
Single electricity market forecasting and energy arbitrage maximization framework

The rapid deployment of renewable-based generation to meet the net-zero carbon targets has affected the wholesale energy paradigm. In the island of Ireland, the Single Electricity Market (SEM) aims to deliver high levels of supply security, reliability, and transparency through multiple markets with different trading time frames and clearing procedures. This paper proposes a powerful methodology to maximize the revenues from the participation in the SEM. A forecasting model of four successive stages based on neural networks is proposed to predict the demand and system marginal prices of the SEM ex-ante markets. An energy arbitrage optimization framework is proposed for battery energy storage systems (BESS) to maximize the arbitrage proﬁts. The methodology efﬁcacy is validated by achieving 91.1% selling accuracy, 97.9% buying accuracy, and 85.1% energy arbitrage net accuracy of the ideal case where the SEM data is perfectly-known for three consecu-tive months. Furthermore, the BESS degradation is evaluated and a cost-beneﬁt analysis is introduced to evaluate the economic feasibility of BESS participating in the SEM ex-ante markets. The results reveal that the participation of BESS in the SEM solely is not prof-itable, however, under stacked revenues arrangement, the proposed methodology can be applied to boost the BESS revenues.
Photonics-based tunable and broadband radio frequency converter

Abstract. This paper is regarding the concept and development of a photonics-based tunable and broadband radio frequency converter (PBRC). It employs an external modulation technique to generate and reconfigure its output frequency, a digital circuit to manage the modulators’ bias voltages, and an optical interface for connecting it to optical-wireless networks based on radio-over-fiber technology. The proposed optoelectronic device performs photonics-based upconversion and downconversion as a function of the local oscillator frequency and modulators’ bias points. Experimental results demonstrate a radiofrequency (RF) carrier conversion with spectral purity over the frequency range from 750 MHz to 6.0 GHz, as well as the integration of the photonics-based converter with an optical backhaul based on a 1.5-km single-mode fiber from a geographically distributed optical network. Low phase noise and distortion absence illustrate its applicability for convergent and reconfigurable optical wireless communications. A potential application relies on the use of PBRC in convergent optical wireless networks to dynamically provide RF carriers as a function of the telecom operator demand and radio propagation environment.
A Framework for Control of Robots With Energy Regeneration

This paper focuses on robot control problems where energy regeneration is an explicit consideration, and it proposes a methodology for modeling and control design of regenerative motion control systems. The generic model consists of a robotic manipulator where some joints are actively controlled and the remaining joints are energetically selfcontained and semi-actively controlled. The model can capture various electromechanical and hydraulic actuator configurations for industrial robots and powered humanassist devices. The basic control approach consists of three steps. First, a virtual control design is conducted by any suitable means. Then, virtual control inputs are enacted by a matching law for the adjustable parameters of the semi-active joints. Finally, the energy storage dynamics are adjusted using design parameters and an optional outer supervisory loop. The method has several attractive features: design simplicity, amenability to simultaneous plant and control design optimization, explicit treatment of energy regeneration, and applicability to multiple domains. This paper emphasizes electromechanical robots whose semi-active joints use ultracapacitors as the single energy storage medium. An internal energy balance equation and associated ideal self-powered operation (ISPO) condition are given for the semi-active joints. This condition is a structural characteristic of the system and independent of the control law. Extensions to handle higher-order dynamics are presented. Also, it is shown that discrepancies between virtual and actual controls can be mapped to parametric uncertainty in the virtual design. Experimental results confirm the validity of the approach. [DOI: 10.1115/1.4030391]
User Experience, Engagement, and Popularity in Mental Health Apps: Secondary Analysis of App Analytics and Expert App Reviews

Background User experience and engagement are critical elements of mental health apps’ abilities to support users. However, work examining the relationships among user experience, engagement, and popularity has been limited. Understanding how user experience relates to engagement with and popularity of mental health apps can demonstrate the relationship between subjective and objective measures of app use. In turn, this may inform efforts to develop more effective and appealing mental health apps and ensure that they reach wide audiences. Objective We aimed to examine the relationship among subjective measures of user experience, objective measures of popularity, and engagement in mental health apps. Methods We conducted a preregistered secondary data analysis in a sample of 56 mental health apps. To measure user experience, we used expert ratings on the Mobile App Rating Scale (MARS) and consumer ratings from the Apple App Store and Google Play. To measure engagement, we acquired estimates of monthly active users (MAU) and user retention. To measure app popularity, we used download count, total app revenue, and MAU again. Results MARS total score was moderately positively correlated with app-level revenue (Kendall rank [T]=0.30, P=.002), MAU (T=0.39, P<.001), and downloads (T=0.41, P<.001). However, the MARS total score and each of its subscales (Engagement, Functionality, Aesthetics, and Information) showed extremely small correlations with user retention 1, 7, and 30 days after downloading. Furthermore, the total MARS score only correlated with app store rating at T=0.12, which, at P=. 20, did not meet our threshold for significance. Conclusions More popular mental health apps receive better ratings of user experience than less popular ones. However, user experience does not predict sustained engagement with mental health apps. Thus, mental health app developers and evaluators need to better understand user experience and engagement, as well as to define sustained engagement, what leads to it, and how to create products that achieve it. This understanding might be supported by better collaboration between industry and academic teams to advance a science of engagement.
BIOMOLECULES EXTRACTED BY ATPS: PRACTICAL EXAMPLES BIOMOL ´ ECULAS EXTRAPOR SBAS: EJEMPLOS PR ´ ACTICOS

The actual biotechnology industry demands fast and economic upstream and downstream processes to purify biomolecules. In this context, di erent purification techniques, that o er both high recovery and purity to the final product, have been assayed by di erent research groups. Liquid-liquid extraction with aqueous two-phase systems is one of the most studied methodologies for bio-separation. This technique presents several advantages such as mild conditions of working, cost-e ectiveness, short-time consumption and high recovery percentage of the final product. With the aim to present a comparison of liquid-liquid extractions with other techniques, several aqueous two-phase extraction processes of biomolecules are presented in this review. We presented the advantages and disadvantages of them as of the compared systems. In general, the highest final product purities are achieved when di erent methodologies are combine, being the chromatographic ones the most applied in the last stages for the high purification factor obtained after them. Alternative methodologies, such as aqueous two-phase systems (ATPS), i:e:, PEG/salts or ionic liquids; aqueous two-phase micellar systems, using solvents and surfactants; and extractive fermentation with ATPS, are relevant for both cost-e ectiveness and time-saving of the purification process.
The highly integrated frequency converter

Integration, by the use of hybrid technology and application specific integrated circuits is a means to reduce cost, increase reliability and to improve performance. Issues like thermal management, mechanical packaging, manufacturing, component choices and testability are some of the ingredients in the integration decision process. The Grundfos X3000 module is an example of an integrated frequency converter module optimized according to the aforementioned issues. Modeling and simulation are necessary in the optimization process and very detailed models have been developed in the Simulink/Matlab environment by the extensive use of finite element tools.
Identification of the Feedback Component of the Neuromuscular System in a Pitch Control Task

This goal of this study is to understand which parts of the the neuromuscular system contribute during a pitch control task. A novel method developed at the Delft University of Technology allows us to determine the contribution of the neuromuscular feedback system by identifying the admittance, which is the frequency response function of the yielded displacement due to an external force perturbation which applied to control inceptor. In an experiment in a full-motion flight simulator, the neuromuscular admittance was identified during a longitudinal pitch tracking task with a side stick, for two different side stick configurations, an approach configuration with a relatively low stick stiffness, and a cruise configuration with a high stiffness. Besides the admittance, also the muscle activity of eleven muscles was measured. To validate whether the external force perturbation changed the control behavior of the pilot, the visual and vestibular response functions were identified as well. From the measured results it could be concluded that the variations of the control inceptor settings had a significant effect on the neuromuscular feedback system (admittance), although the overall lumped neuromuscular system did not change significantly. A very interesting finding were the very high levels of co-contraction measured during the pitch tracking tasks. And lastly it could be concluded that the required external force perturbation did not affect the control behavior.
Characteristics and potential applications of nonlinear left‐handed transmission lines

The characteristics of nonlinear left‐handed (NL‐LH) transmission lines (TLs) are discussed for the first time. A LH‐TL with varactor‐diode series capacitance is analyzed in terms of dispersion and nonlinearity characteristics, and its voltage‐wave partial differential equation is derived. Numerical responses of the NL‐LH‐TL to harmonic and pulse waves illustrate the conjoint effects of frequency dispersion and nonlinearity. Potential applications are suggested. © 2004 Wiley Periodicals, Inc. Microwave Opt Technol Lett 40: 471–473, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20007
The Meaning of Management Information Systems and its Role in Telecommunication Companies in Yemen

Management information system one of the most important tools in any organization, which aims to provide reliable, complete, accessible, and understandable information in a timely manner to the users of the system. Management information systems assisted in automating tasks. Automation can save time, money, resources, reduce employee's staff, and enhance organizational workflow. In addition assist in increased organization productivity, effectiveness, increase customer satisfaction, and efficiency of the work. In the telecommunication companies, MIS in general enables to collect, processing and storage of the information; with overall purpose to make that information available on demand in the required format. Telecom Companies can't work without management information systems as the number of participants in these companies more than million subscribers, so it's hard to save their data using the manual method (using files). Synthesizing from the literature and interviews with some of the employees of telecommunications companies in Yemen, this paper attempts to explain the concept of MIS and clarify the role of MIS in telecommunication companies in Yemen.
Effects of magneto-ionic propagation on the polarization scattering matrix

Magneto-ionic propagation effects are considered at radio frequencies that are sufficiently high so that there is negligible physical separation between the ordinary and extraordinary propagation paths. It is recognized that the sensible magneto-ionic propagation effects are birefringence and Faraday rotation. A matrix representation for magneto-ionic propagation is employed in order to facilitate the determination of the effects of magneto-ionic propagation on the polarization scattering matrix of an arbitrary, monostatic radar target. It is shown that the propagation path must be calibrated with a known, four-way symmetric target when both birefringence and Faraday rotation are present, if it is desired to eliminate the effects of magneto-ionic propagation. However, the determinant of the polarization scattering matrix and the trace of the power scattering matrix are, in general, unaffected by magneto-ionic propagation. If birefringence is absent, then even if the radar target is arbitrary and unknown, the effects of Faraday rotation can be accounted for in a particularly simple manner if the scattering matrix is referred to circular polarization.
Numerical Investigations of Quenching Cooling Processes for Different Cast Aluminum Parts

In this paper, discussions of a recently improved Computational Fluid Dynamics (CFD) methodology for virtual experimental investigation of the heat treatment for cast aluminium parts are presented. The immersion quenching process of the heated work piece in a sub-cooled liquid pool is handled by employing the Eulerian multi-fluid modelling approach, which is implemented within the commercial CFD code AVL FIRE®. The applied heat and mass transfer rates are modelled based on the different boiling regime, which is controlled by the Leidenfrost temperature. The objective of the present research is to present an updated quenching model where variable Leidenfrost temperature is applied. Furthermore, simulation results are compared with available measurements for a wide variety of quenching scenarios involving immersion cooling of the step plate and real cylinder head with different solid parts orientations. The temperature histories predicted by the presented model fit very well with the available experimental data at different monitoring locations ©2014 Journal of Mechanical Engineering. All rights reserved.
A Class of Public Opinion Dissemination Model considering the Information Screening Mechanism

This paper introduces an information screening mechanism based on the general SEIR model of public opinion dissemination in complex networks. Specifically, networks users screen the information disseminated in complex networks based on their knowledge reserve, life experience, and personal preferences. This screening mechanism filters the public opinion disseminated. Based on the quantitative analysis of this mechanism, we establish a new SEIR model of public opinion dissemination in complex networks. The simulation results on the Facebook network data set provide theoretical guidance for the formulation of effective public opinion suppression strategies.
Analytical Aspects of Gear Lubrication on the Disengaging Side

Variations and inconsistencies in the ratings of rocket engine lubricating oils on the Ryder Gear Tester prompted an analytical investigation into the mechanism of lubrication. It is considered that gears are lubricated on the disengaging side primarily to rapidly dissipate frictional heat. Based on this consideration, it is contended that oil nozzle position and depth of oil impingement are important variables. It is analytically shown by using the Ryder gears how these important variables could contribute to the load-carrying ability of oils and how these contributions could affect the Ryder ratings of oils. Presented as an American Society of Lubrication Engineers paper at the Lubrication Conference held in San Francisco, Calif. , October 18–20, 1965.
Implementation, Driver Behavior, and Simulation: Issues Related to Roundabouts in Northern New England

Roundabouts are an emerging type of intersection design and a relatively new addition to the transportation system in the United States. This imposes two traffic engineering and research related issues. First, data and research on traffic operations and driver behavior at roundabouts are limited. Although beginning to expand in recent years, the knowledge of roundabout operations has been primarily based on data collected abroad where roundabouts are more common. Moreover, capacity and operational models are inadequate since they are derived primarily from concepts of existing stop-controlled and signalized intersections. Second, some motorists are not as accustomed to the new driving patterns associated with a roundabout. This affects traffic operations, especially at newly constructed roundabouts, but can also impact public acceptance of roundabouts which may result in part from the lack of exposure and driver confusion. The research presented here can be organized into three main objectives that center on: 1) better understanding the difficulty of obtaining public approval of roundabouts in the northeastern region of the United States; 2) developing a more comprehensive typology of driving behavior and actual driver maneuvers at roundabouts based on real world data; and 3) advancing the simulation modeling of roundabouts by incorporating driver behavior that is not currently represented in existing traffic simulation models.
THE EFFECT OF CUSTOMIZATION SERVICE ON FLOW EXPERIENCE AND BEHAVIOR INTENSIONS IN CUSTOMER CO-DESIGN PROCESS

Computer Mediated Environments (CMEs) prepared a satisfactory opportunity for providing customization service on line. This characteristics of synchronous and interactive allow designers or enterprises enhance to discover customer s’ demands. Interface design plays a core role and influence customers’ decisions. Yet, the research of this field also has varied investigation about “flow experience”, which considerable attention has been paid in the past to research issues related to motionless state of customization product process in CMEs (e.g. system, technology, and communication tool et al.), a literature on issues of dynamic state has emerged only very slowly and in a more scattered way. It excited the curiosity of this study In this study, we attempt evaluate customization improvements of customer value by content customization and context customization. Further to investigate the relationships between content and context customization, flow experience and behavioral intentions when provide customer co-design service. According the findings, content customization service and context customization service provided enhanced the flow experience occur. Yet, the flow experience was significantly associated with behavior intension.
Analysis of balanced active doubler for broad-band operation - the frequency-tuning concept

A comprehensive analysis of an active balanced frequency doubler is described and proposed as a new concept: tuning the center frequency at which the doubler exhibits its highest performance to extend the usable bandwidth of the device. The concept is validated using a fabricated V-band pseudomorphic high electron-mobility transistor frequency doubler. For this device, a substantial improvement in the usable bandwidth (more than double) is achieved, demonstrating that the proposed concept is particularly suitable for the realization of high spectral purity and widely tunable V-band frequency sources.
Methodology to measure fundamental performance parameters of x-ray detectors

To judge the potential benefit of a new x-ray detector technology and to be able to compare different technologies, some standard performance measurements must be defined. In addition to technology-related parameters which may influence weight, shape, image distortions and readout speed, there are fundamental performance parameters which directly influence the achievable image quality and dose efficiency of x-ray detectors. A standardization activity for detective quantum efficiency (DQE) for static detectors is already in progress. In this paper we present a methodology for noise power spectrum (NPS), low frequency drop (LFD) and signal to electronic noise ratio (SENR), and the influence of these parameters on DQE. The individual measurement methods are described in detail with their theoretical background and experimental procedure. Corresponding technical phantoms have been developed. The design of the measurement methods and technical phantoms is tuned so that only minimum requirements are placed on the detector properties. The measurement methods can therefore be applied to both static and dynamic x-ray systems. Measurement results from flat panel imagers and II/TV systems are presented.
Making Architecture Design Decisions: An Economic Approach

Abstract : The resources available to build any system are finite. The decisions involved in building any nontrivial system are complex and typically involve many stakeholders, many requirements, and many technical decisions. The stakeholders have an interest in ensuring that good design decisions are made decisions that meet their technical objectives and their tolerance for risk. These decisions should, as much as possible, maximize the benefit that the system provides and minimize its cost. The Cost Benefit Analysis Method (CBAM) was created to provide some structure to this decision-making process. The CBAM analyzes architectural decisions from the perspectives of cost, benefit, schedule, and risk. While the CBAM does not make decisions for the stakeholders, it does serve as a tool to inform managers and to structure the inquiry so that rational decisions can be made. This report describes the steps of the CBAM and its application to a real-world system.