Miracle-dz/UniFAR-FTUs huggingface dataset:
Barriers to the increased utilization of coal combustion/desulfurization by-products by government and commercial sectors - Update 1998

The following conclusions are drawn from the information presented in this report: (1) Joint efforts by industry and government focused on meeting RTC recommendations for reduction/removal of barriers have met with some success. The most notable of these are the changes in regulations related to CCB utilization by individual states. Regionally or nationally consistent state regulation of CCB utilization would further reduce regulatory barriers. (2) Technology changes will continue to be driven by the CAAA, and emission control technologies are expected to continue to impact the type and properties of CCBs generated. As a result, continued RD and D will be needed to learn how to utilize new and changing CCBs in environmentally safe, technically sound, and economically advantageous ways. Clean coal technology CCBs offer a new challenge because of the high volumes expected to be generated and the different characteristics of these CCBs compared to those of conventional CCBs. (3) Industry and government have developed the RD and D infrastructure to address the technical aspects of developing and testing new CCB utilization applications, but this work as well as constant quality control/quality assurance testing needs to be continued to address both industry wide issues and issues related to specificmore » materials, regions, or users. (4) Concerns raised by environmental groups and the public will continue to provide environmental and technical challenges to the CCB industry. It is anticipated that the use of CCBs in mining applications, agriculture, structural fills, and other land applications will continue to be controversial and will require case-by-case technical and environmental information to be developed. The best use of this information will be in the development of generic regulations specifically addressing the use of CCBs in these different types of CCB applications. (5) The development of federal procurement guidelines under Executive Order 12873 titled ''Federal Acquisition, Recycling and Waste Prevention,'' in October 1993 was a positive step toward getting CCBs accepted in the marketplace. Industry needs to continue to work with EPA to develop additional procurement guidelines for products containing CCBs--and to take advantage of existing guidelines to encourage the use of CCBs in high-profile projects. (6) Accelerated progress toward increased utilization of CCBs can be made only if there is an increased financial commitment and technical effort by industry and government. The framework for this has been set by the successful cooperation of industry and government under DOE leadership. Cooperation should continue, with DOE fulfilling its lead role established in the RTC. It is clear that the RTC recommendations continue to have validity with respect to increasing CCB utilization and continue to provide guidance to industry and government agencies. « less
Contextual attributes to promote positive social interdependence in problem-based learning: a qualitative study

Background:Problem-based learning (PBL) is classified as a collaborative learning approach, wherein students learn while contributing meaning to experiences and interactions with others. An important theoretical fundament of PBL is social interdependence theory (SIT) because positive social interdependence within a group has been found to be key to better learning performance and future attitudes towards team practice. However, most previous studies in health professions education focused on cognitive outcomes, and few studies have focused on collaborative behaviors in PBL groups. The lack of this empirical insight makes implementation of PBL difficult, especially in contexts where there is limited experience with collaborative learning. Therefore, the aim of this study was to elucidate what promotes or hinders positive social interdependence and how the attributes work during PBL. Methods:We conducted four focus groups among clinical year medical students (n=24) who participated in PBL tutorials in the formal curriculum. We asked semi-structured questions that corresponded with the overall concept of SIT. We analyzed the transcript using constructivist grounded theory and developed a model to explain contextual attributes that promote or hinder positive social interdependence in PBL. Results:Two contextual attributes of “academic inquisition” and “work efficiency” affect social interdependence among a student group in PBL. Academic inquisition is students’ desire to engage in their academic learning, and work efficacy is students’ attitude toward learning as an imposed duty and desire to complete it as quickly as possible. These attributes are initially mutually conflicting and constructing social interdependence through multiple steps including inquisition from a case, seeking efficient work, sharing inquisition for problem solving, expecting mutual contributions, and complementing learning objectives. Conclusion:These findings will contribute to understanding collaborative learning environments in PBL and may help explain contexts where PBL is less successful. The model can also be used as a tool to support innovation of PBL as collaborative learning.
Including Gamification Techniques in the Design of TANGO: H Platform

This paper presents the design approach of TANGO:H (Tangible Goals: Health): a platform for the creation of physical and cognitive rehabilitation exercises. This platform is adaptable to the characteristics of the population it is intended: children hospitalized and in home care. Also, it is highly configurable and customizable, thanks to exercises editor: TANGO:H Designer. This feature allows health professionals and educators to create game-like exercises, adapted to the specific needs of end users and to the context in which the intervention will take place. Note that TANGO:H was designed for the recreational, educational and rehabilitation use for children at hospital. So, in order to improve the users’ experience with the platform and their engagement, several Gamification techniques has been included. This paper focused on the technical and gamification requirements of the design of TANGO:H.
Systems Architectures for a Tactical Naval Command and Control System

Abstract : Command and control (C2) is an enigma that has been studied by military leaders and warfare analysts for hundreds of years. As a result of the numerous definitions and concepts of C2, the design of C2 systems is a challenge to systems engineers. Adding to the challenge is the understanding and integration of new operational concepts, such as Network-Centric Warfare, identified by stakeholders as necessary to meet operational needs. Through the use of a system architecture methodology, this thesis created a general vision of the system; identified the boundaries of, inputs to, outputs from, and objectives for the system; described what the system was to do with the identified inputs to produce the desired outputs; described the resources that comprised the system, the procedures by which the system was used, and the controls on the system; and proposed two alternative system architectures from which an analysis of designs could be conducted. From this methodology, numerous points of integration between doctrine and material, as well as areas for future effort and study, were identified to assist in the development and integration of net-centric systems and net-centric doctrine to meet the command and control needs of future tactical naval forces.
A new harmonic suppression scheme for three-phase four-wire distribution systems

Three-phase four-wire distribution systems have been widely used in commercial and industrial installations. The neutral conductor carries the zero sequence current due to the unbalanced loading among the phase conductors. However, as electronic loads increases, their rectifier front-ends produce significant harmonic current. The triplen (3/sup rd/, 9/sup th/, .) harmonic current produced by these loads tends to accumulate in the neutral conductor due to its zero sequence nature, thus resulting in overloading of the neutral conductor and the distribution transformer. Most of the existing harmonic mitigation schemes focus on re-directing zero sequence current harmonics back to the phase conductors. Such schemes can prevent overloading of the distribution transformer, but the neutral conductor is still burdened by the excessive current harmonics. This paper proposes a new harmonic suppression scheme for the neutral conductors of three-phase four-wire distribution systems. In the proposed scheme, an active filter is connected in series with the neutral conductor. The inverter acts to suppress harmonic current in the neutral conductor to prevent overloading. The active filter operation will not affect the fundamental component due to the unbalanced loading, which the neutral conductor is sized for. The proposed scheme can eliminate current harmonics overloading on both the neutral conductor and the distribution transformer with only one active filter installation.
Database of Single-Channel and Binaural Room Impulse Responses of a 64-Channel Loudspeaker Array

A freely available database of measured single-channel and binaural room impulse responses (RIRs and BRIRs) of a 64-channel loudspeaker array of rectangular shape under varying room acoustical conditions is presented. The RIRs have been measured at three receiver positions for four different absorber configurations. Corresponding BRIRs for head-orientations in the range of ±80◦ in 2◦ steps with a KEMAR manikin have been captured for a subset of seven combinations of position and absorber configurations. The data is provided in the Spatially Oriented Format for Acoustics (SOFA). It can be used to study the influence of the listening room on multichannel audio reproduction. As an application, RIRs for the synthesis of a sound field by Wave Field Synthesis are shown.
Planned preventive maintenance in the preservation of historic heritage sites as a first form of valorisation

This research develops various reflections on the role and repercussions of planned preventive maintenance activities in historic heritage sites as an opportunity for their valorisation. The first step is to define the terminology, underscoring reciprocal relationships and the need to organise structured activities and applications that outline contents, procedures and processes for interventions, with innovative strategies that promote the preservation and valorisation of cultural heritage sites. In this sense, this paper proposes the experimental results of work projects conducted on significant cases.
Cavity-resonance-activated wavelength selectable fiber and diode lasers

Summary form only given. Wavelength-controllable components, such as laser sources, which can operate at several selectable wavelengths, can be very attractive for many applications, especially for dynamic wavelength division multiplexing (WDM) networks in fiber optic communication. It is difficult to obtain fiber lasers and even diode laser-based systems with several wavelengths, which can be tuned and selected at high speeds. We report on wavelength selectable fiber and diode lasers, which can operate at each of several chosen wavelengths, with the possibility of switching between them at high speeds. The obtained selection time was /spl sim/5 ns for the diode laser system and /spl sim/150 ns for the fiber laser. The method is based on mode-locking or cavity-resonance-operated wavelength selection (CROWS). It is done by applying the suitable mode-locking frequency of a multiple-length fiber laser cavity, formed by multiple successive fiber grating reflectors, each with a different Bragg wavelength. It allows selection and high speed switching between these wavelengths. Such lasers can be useful for dynamic wavelength division multiplexing (WDM) in fiber optic networks.
Lifeline Earthquake Engineering

This proceedings contains papers presented at the Fourth U.S. Conference on Lifeline Earthquake Engineering held in San Francisco, CA, August 10-12, 1995. The conference was organized around, and the papers were presented on, the following general topic areas: 1) Bridge analysis and rehabilitation; 2) bridge earthquake damage assessment; 3) bridge hazard assessment and prioritization methods; 4) case studies; 5) electric power and communications; 6) gas and liquid fuels; 7) infrastructure rehabilitation; 8) lifeline interaction; 9) Northridge earthquake; 10) post earthquake investigations; 11) seismic hazards; 12) socioeconomic effects; and 13) water and sewerage.
Performance of WCDMA spreading in downlink for FDD mode

UMTS is the European standard of the third generation of mobile communications and its air interface is called WCDMA. In this paper a simple WCDMA system in downlink and FDD mode is simulated and results are presented. The simulation that is an execution, apart from physical layer functions as layer 1, includes data modulation, spreading multipath channel, AWGN noise, data demodulation, despreading and Rake receiver. It is obvious that transmission methods of data correspond to WCDMA standards. In other words, frames and slots structure, data symbols setting and required parameters follow the defined standards.
Photovoltaic system performance statistical analysis

PV system performance evaluation is not clear today. Performance Ratio (PR) or other performance indicators are site-dependant and in many cases systems reveal to have poorer performance than expected. Thus, the evaluation of factors of influence is very vague and a generalised method is necessary. We present a new methodology addressing performance for the overall PV system, for which all inputs are treated as stochastic variables. The methodology is explained and examples are given for different kinds of PV systems (grid connection, pumping SHS or SAPV systems with storage even PV/thermal systems). Additional applications are also presented (irradiation data generation, islanding probability, PV module matrix): Two main applications illustrate the methodology: the calculation of the battery SOC probability density function to assess the design of the PV system, and a way to evaluate the representativeness of the battery tests sequence in comparison to the field operating conditions the battery will face.
Evaluating the perception of design errors in the construction industry

Abstract : Fhe objective of this research was to collect data, through surveys and interviews, from the principle players in the construction industry to determine their perception of what constitutes a design error. Through this methodology an analysis was conducted to examine some of the major contributing factors to design errors and at what level they affect cost and schedule growth in construction projects. The areas of focus were to determine if the principle parties: 1) agreed on a definition of design error; 2) were interested in the burden of responsibility for errors financially; 3) ranked the factors that control design and construction under a common interest; 4) believe that computer aided drafting has reduced the number of design errors and improved production; 5) could assign a percentage to design errors in relation to all project changes.
A review on five medicinal plants considering the therapeutic potentials in the management of COVID-19

The spread of pandemic coronavirus disease-2019 has become a health emergency worldwide. Since the unprecedented outbreak, attention has been raised worldwide to develop and research for control options and treatments. Although several clinical trials are ongoing, no registered drugs or vaccines are available yet. As situation warrants for the exploration of a successful antiviral, there should be a search for the remedies in nature also. Medicinal plants and their metabolites have long been used as a treatment option for various life-threatening diseases with minimal or no side effects. Thus this review aims to summarize previous outcomes concerning the role of medicinal plants in treating several life-threatening diseases. Above all, this work intends to find the constituents of five selected medicinal plants and their possible working mechanisms in the management of COVID-19. Constituents of the presented medicinal plants possess excellent pharmacological properties, including significant antiviral and antimicrobial potential. Based on the traditional uses, pharmacological properties, and previous studies, these medicinal plants mentioned in this review can be considered as a possible therapeutic option for the management and treatment of COVID-19. However, further extensive researches and trials are suggested to discover specific effects and dosage for this pathogenic outbreak.
Performance of a 150-MW S-band klystron

As part of an international collaboration, the Stanford Linear Accelerator Center (SLAC) klystron group has designed, fabricated, and tested a 60-Hz, 3-{mu}s, 150-MW S-band klystron built for Deutsches Elektronen Synchrotron (DESY). A test diode with a 535-kV, 700-A electron beam was constructed to verify the gun operation. The first klystron was built and successfully met design specifications. The 375-MW electron beam represents a new record for SLAC accelerator klystrons in terms of voltage, current, energy, and ruggedness of design. The rf output power is a 150% increase over the S-band tubes currently used in the two-mile-long linear accelerator at SLAC. This paper discusses design issues and experimental results of the diode and klystron.
Identification and Control of an Industrial Thickener Using Historical Data

In the mining industry, thickeners are used to increase density of slurries by removing water. When a thickener is in operation, the underflow slurry density should follow a given setpoint and stay inside a boundary layer. In general, thickeners are manually controlled. However, industrial experience has shown that manual control is not sufficient. For this reason, an advanced process control strategy is proposed in this paper. On the one hand, using historical data, a linear dynamic model of the studied thickener is developed. In this regard, data is collected, prepared, and data informativity is studied to ensure model identifiability and interpretability. On the other hand, a model predictive control is designed to control the process by manipulating the feed and the underflow slurry flowrates. The simulation results show that the method can be successfully used to control the underflow slurry density in the presence of feed variations and unmeasured disturbances.
Development of Orbital Drilling for the Boeing 787

The new materials and material combinations such as composites and titanium combinations used on today’s new airplanes are proving to be very challenging when drilling holes during manufacturing and assembly operations. Orbital hole drilling technology has shown a great deal of promise for generating burr free, high quality holes in hard metals and in composite materials. This paper will show some of the orbital drilling development work Boeing is doing with Novator to overcome the obstacles of drilling holes in a combination of both hard metals and composites. The paper will include a new portable orbital drilling system designed for these challenging applications as well as some test results achieved with this system.
Silicon photonics packaging : characterization of a waveguide grating coupler and modeling of the fiber coupling ratio

The main issue for a fiber coupling structure with a nanophotonic circuit is of course to reach very low insertion losses. However, another major issue is the polarization sensitivity as optical networks usually use non polarization maintaining optical fibers. Therefore, to implement a nanophotonic circuit into optical networks, the fiber coupling structures must have a very low polarization sensitivity, especially concerning the coupling from the fiber towards the circuit. Surface grating couplers are very interesting fiber coupling structures as they allow for coupling anywhere on a circuit without the need for cleaving and polishing facets, which makes wafer-scale testing of photonic circuits possible. However, one-dimensional gratings couplers are well-known to be polarization sensitive. In this paper, we show that a one-dimensional grating may have very similar coupling performances for TE and TM polarizations. Only the optimal injection angle may still differ between TE and TM polarizations. Therefore, packaging consideration is discussed to design an optical coupling system between the fiber and the grating coupler which should allow the optimization of the incident angle for both fundamental polarized modes. This way a low polarization sensitive coupler using a simple one-dimensional grating coupler is proposed.
Pressure Drop for Parallel Flow Through Rod Bundles

Friction factors for flow parallel to a rod bundle have been determined experimentally in a Reynolds-number range from approximately 5000 to 100,000. Three rod arrays were used; namely, a 1.20 pitch-to-rod diameter ratio on a square lattice, and a 1.12 pitch-to-rod diameter ratio on both square and equilateral triangular lattices. Entrance plus exit-loss coefficients, and joint loss coefficients between axially aligned rod bundles also were measured experimentally for tube-sheet end connections. For the square arrays, the effect of tube-sheet flow area on these loss coefficients was investigated. Results are presented in graphical form.
The Feasibility Study of Using Space Vector Modulation Inverters in Two-Level of Integrated Photovoltaic System

In this paper a system of integrated photovoltaic converter with vector switching control inverter with the modulation method of spatial two-level has been presented. The structure of the system is presented with the proposed and the structure of the invertors’ voltage source has been reviewed. Space vector modulation control method of two-level in a voltage source inverter and then provide proposed system analysis and keying modes are analyzed and the system designing and with the simulation of MATLAB software and standards of the total harmonic distortion for a few modulation methods for comparison, and evaluation has been proposed. The system has been analyzed in terms of economic. A prototype for assessing and comparing with power of 360w in the output with DC link voltage is 400 V and the module voltage is 46.5v has an efficiency of 97.9% in its output that improved than SPWM of 1.6% and to the PWM of 2.7% and Has been simulated with MATLAB software and compared to with a few examples of the control systems of the sinusoidal pulse width modulation and pulse width modulation. Speed and Switching and performance of the system have been analyzed and methods to reduce switching losses and increase of the system efficiency in the practical examples are proposed. DOI: http://dx.doi. org/10.11591/telkomnika.v14i2.7414
The application of transmission-line modelling to EMC design

Numerical modeling tools can aid the process of designing for EMC. Transmission-line modelling (TLM) has been successfully applied in a number of EMC applications. The paper outlines the role of modelling in EMC; the features of TLM which suit it to the simulation of EMC problems, some illustrative examples of its application, and future trends. >