Miracle-dz/UniFAR-FTUs huggingface dataset:
Self-Healing Effect Caused by Accelerated Carbonation of Thermally Damaged Cement Mortar: Changes in Microstructural and Macroscopic Properties

The objective of this work was to examine the influence of accelerated carbonation on the microstructural and macroscopic properties of thermally damage cement mortar. A normalised CEM II mortar was treated at 500°C then submitted to carbonation at 20°C, 65% relative humidity and 20% of CO2 concentration. The pores size distributions were determined from nitrogen adsorption. We also followed changes in electrical resistivity and ultrasonic velocity. The results showed that losses of macroscopic properties caused by cracks appeared at high temperature were restored due to carbonation. This highlighted the self-healing effect by accelerated carbonation which allowed the thermally damaged mortar to recover its initial properties.
Gastronomic events in the function of creating a brand of a tourist destination: The example of strudel festival in Dolovo

Gastronomic events in recent years represent a very significant segment for the development of tourism. There are numerous events traditionally taking place in Vojvodina. Each of these events is unique and represents a rich variety of customs, culture and traditions. The authentic gastronomic offer, which is promoted through these events, is an important segment for creating a brand of a particular place and tourist destination. The aim of this study is to investigate the recognizability of the Strudel festival in Dolovo, as well as the authenticity of this gastronomic event, in terms of creating a brand of the tourist destination. The research was carried out using the survey method, through a questionnaire, on a sample of 150 respondents. Based on the collected data, using statistical methods of binary logistic regression, chi-square and Fisher's test, the analysis was performed and the results were presented. The results of the research show that the Strudel festival in Dolovo and its brand - strudels - have a high level of recognizability among visitors. However, the Strudel festival in Dolovo should be promoted more intensively, as it is currently recognized locally, and has the potential to attract more tourists.
A Hybrid Pulse Width Modulation Strategy for Dual Bridge Multilevel DC-Link Inverter

The paper attempts to formulate a pulse width modulation (PWM) strategy suitable to operate the switches at high frequency in the dual bridge multilevel dc link inverter (MLDCI). It follows the theory of sub harmonic pulse width modulation (SHPWM) to involve a direct comparison between the sinusoidal reference and several stacked high frequency triangular waveforms. It charters to create a negative cycle inversion (NCI-HPWM) based single reference and avail the phenomenon of single carrier modulation strategy to pronounce a better synthesis of the output waveform. It forges to outline the locus for fundamental switching of the lower part of the power module in an effort to ensure it remains within the boundaries of the operating region. The scheme investigates using Matlab based simulation the proposed NCI-HPWM methodology for an 11- level inverter, and establishes its benefits in terms of the frequency spectrum. It includes detailed FPGA based experimental waveforms to orchestrate the feasibility of the mechanism for use in practical circuits
The Role of Academic Emotion Regulation and Resilience in Predicting Students’ Academic Burnout

Objective: The current study aimed to investigate the role of Emotional Regulation (ER) and resilience in predicting students' academic burnout. Methods: This was a descriptive correlational study. The statistical population of the study included all female secondary school students of the 10th-grade of the humanities and experimental sciences (N=305) in the second semester of 2018-2019 in Shabestar City, Iran. Accordingly, a sample of 100 individuals was selected by cluster sampling method. To collect the required data, the Academic Burnout Questionnaire (Breso et al., 1997), the Emotion Regulation Questionnaire (ERQ; Gross & John, 2003), and the Samuels' Academic Resilience Scale (2004) were used. Results: The collected data were analyzed using Pearson correlation coefficient and regression analysis methods. The obtained results indicated that ER and academic resilience explained 37% of the total variance of academic burnout in the examined students. The F-value indicated that the prediction of academic burnout was significantly based on ER and academic resilience in the study participants (P=0.001). Conclusion: As per the present study, the long-term planning to increase the explored variables will be an essential step in preventing students' academic burnout.
Modelling human actions on lightweight structures : experimental and numerical developments

This paper presents recent, numerical and experimental, developments in modelling dynamic loading generated by humans. As modern structures with exposure to human-induced loading, such as footbridges, building floors and grandstands, are becoming ever lighter and more slender, they are increasingly susceptible to vibration under human-induced dynamic excitation, such as walking, jumping, running and bobbing, and their vibration serviceability assessment is often a deciding factor in the design process. While simplified modelling of the human using a harmonic force was sufficient for assessment of vibration performance of more robust structures a few decades ago, the higher fidelity models are required in the contemporary design. These models are expected not only to describe both temporal and spectral features of the force signal more accurately, but also to capture the influence, psychological and physiological, of human-structure and human-human interaction mechanisms on the human kinematics, and consequently on the force generated and the resulting vibration response. Significant advances have been made in both the research studies and design guidance. This paper reports the key developments and identifies the scope for further research.
Power-flow tracing and wheeling costing considering complex power and convection lines

In a competitive-market environment, deregulation of the electricity industry and thus transmission open access make it even more important to allocate the cost of transmission service fairly. The proposed method can deal with the problem of reactive-power decomposition which could not easily be resolved previously. An equivalent line circuit based on the nominal-T model for reactive-power decomposition is presented. Graph theory and the proportional-sharing principle are employed to trace power flow; the results are then employed to determine the real-power contribution of generators to lines and loads and the reactive-power contribution of generators and lines to loads. The proposed method is illustrated by means of a simple example. Because complex power rather than real power is considered, numerical results from the proposed method are more reasonable than those from the method which considers only real power.
Salt Disposal Investigations to Study Thermally Hot Radioactive Waste In A Deep Geologic Repository in Bedded Rock Salt - 12488

A research program is proposed to investigate the behavior of salt when subjected to thermal loads like those that would be present in a high-level waste repository. This research would build upon results of decades of previous salt repository program efforts in the US and Germany and the successful licensing and operation of a repository in salt for disposal of defense transuranic waste. The proposal includes a combination of laboratory-scale investigations, numerical simulations conducted to develop validated models that could be used for future repository design and safety case development, and a thermal field test in an underground salt formation with a configuration that replicates a small portion of a conceptual repository design. Laboratory tests are proposed to measure salt and brine properties across and beyond the range of possible repository conditions. Coupled numerical models will seek to describe phenomenology (thermal, mechanical, and hydrological) observed in the laboratory tests. Finally, the field test will investigate many phenomena that have been variously cited as potential issues for disposal of thermally hot waste in salt, including buoyancy effects and migration of pre-existing trapped brine up the thermal gradient (including vapor phase migration). These studies are proposed to be coordinated and managed bymore » the Carlsbad Field Office of DOE, which is also responsible for the operation of the Waste Isolation Pilot Plant (WIPP) within the Office of Environmental Management. The field test portion of the proposed research would be conducted in experimental areas of the WIPP underground, far from disposal operations. It is believed that such tests may be accomplished using the existing infrastructure of the WIPP repository at a lower cost than if such research were conducted at a commercial salt mine at another location. The phased field test is proposed to be performed over almost a decade, including instrumentation development, several years of measurements during heating and then subsequent cooling periods, and the eventual forensic mining back of the test bed to determine the multi-year behavior of the simulated waste/rock environment. Funding possibilities are described, and prospects for near term start-up are discussed. Mining of the access drifts required to create the test area in the WIPP underground began in November 2011. Because this mining uses existing WIPP infrastructure and labor, it is estimated to take about two years to complete the access drifts. WIPP disposal operations and facility maintenance activities will take priority over the SDI field test area mining. Funding of the SDI proposal was still being considered by DOE's Offices of Environmental Management and Nuclear Energy at the time this paper was written, so no specific estimates of the progress in 2012 have been included. (authors)« less
/spl mu/-synthesis power system stabilizer design using a bifurcation subsystem based methodology

Summary form only given. A /spl mu/-synthesis power system stabilizer (MPSS) design is presented for a two-area system in This work. The uncertainty is modeled based on structural information of the system and the bifurcation parameter induced nonlinear change in the bifurcation subsystem that experiences, produces, and causes the full system bifurcation. The control objective is to damp out the interarea oscillation as well as maintaining the bus voltages for the variation of the uncertainty parameter. The determination of the robust control device location that is expected to give better control performance is discussed. The performance index definition reflects the desired control purpose. A very flexible robust control configuration, that can be easily applied for different control designs, is shown. The RGA matrix is studied to evaluate the robust power system stabilizer design. RGA matrix information suggests that the control structure and capability of disturbance rejection have been drastically improved by MPSS design. The time simulation verifies the improvement of control performance and robustness.
Geometric variation simulation and robust design for flexible cables and hoses

This article presents how to do stability analysis, variation simulation and tolerance envelopes for deformable cables and hoses. In this way, the well-established methods for analyzing and minimizing the propagation of geometric variation are extended from rigid and sheet metal assemblies to large deformations of slender parts. This extension is highly motivated, not at least, by the increased amount of cables and hoses in electrified and hybrid solutions in the automotive industry. To secure the geometric correctness of the analysis, we use a nonlinear rod approach in the implementation of a simulation model of flexible cables that accounts for large deformations and supports a wide range of common cable clip types, cable joints and branches. A selection of measures and visualizations that reflect the spatial effects of geometric variation in deformable cables is incorporated in established variation analysis techniques. In particular, the concept of tolerance envelopes for rigid parts has been extended to also handle system of slender parts such as cables and hoses. This article extends previous research on robust design and variation simulation to cables subject to large deformations and has been successfully applied on two typical industrial cases: a wiring harness attached with various types of clips to a static surrounding and a cooler hose subjected to a high-frequency sampled engine motion.
Textile antenna with EBG structure for body surface wave enhancement

A textile antenna with an electric bandgap (EBG) structure for body surface wave enhancement is proposed. The proposed antenna is composed of a centre-fed circular patch to generate the TM01 mode and an EBG structure near the patch to guide the TM wave along the horizontal surface (θ = 90°). Considering the wearability, the antenna has been fabricated using only textile materials such as conductive textiles, conductive thread, and a leather substrate, and has an enhanced radiated field along the surface direction in the 5.8 GHz industrial, scientific, and medical (ISM) band for on-body communication. The proposed antenna has a diameter of 1. 98λ 0 and a thickness of 0. 058λ 0 at 5.8 GHz.
Using the Hybrid FE-SEA Method to Predict Structure-borne Noise Transmission in aTrimmed Automotive Vehicle

A Hybrid method that rigorously couples Statistical Energy Analysis (SEA) and Finite Element Analysis (FEA) has been used to predict interior noise levels in a trimmed vehicle due to broadband structure-borne excitation from 200Hz to 1000Hz. This paper illustrates how the Hybrid FE-SEA technique was applied to successfully predict the car response by partitioning the body-in-white into stiff components described with FE and modally dense components described with SEA. Additionally, it is demonstrated how detailed local FE models can be used to improve SEA descriptions of car panels and couplings. The vibration response of the bare car floor and dash is validated against experiments. Next, the radiation efficiency and vibration response of bare and trimmed vehicle panels are compared against reference numerical results. Finally, interior noise levels in bare and trimmed configurations are predicted and results from a noise path contribution analysis are presented.
Cost-effective selection and multi-period scheduling of pavement maintenance and rehabilitation strategies

An optimization methodology is developed for determining the most cost-effective maintenance and rehabilitation (M&R) activities for each pavement section in a highway pavement network, along an extended planning horizon. A multi-dimensional 0–1 knapsack problem with M&R strategy-selection and precedence-feasibility constraints is formulated to maximize the total dollar value of benefits associated with the selected pavement improvement activities. The solution approach is a hybrid dynamic programming and branch-and-bound procedure. The imbedded-state approach is used to reduce multi-dimensional dynamic programming to a one-dimensional problem. Bounds at each stage are determined by using Lagrangian optimization to solve a relaxed problem by means of a sub-gradient optimization method. Tests for the proposed solution methodology are conducted using typical data obtained from the Texas Department of Transportation.
Motion control of protozoa for bio mems

This paper investigates the possibility as to whether protozoa can be treated as a living micro manipulator/actuator. Motion control of protozoa is made by using the negative galvanotaxis. First, a basic property test with a DC electric field showed that the Paramecium could be controlled by the electrical potential gradient. By using the eight-direction carbon electrode pool (4 mm electrode distance and 0.2 mm thickness), the operator can control the Paramecium in the aiming direction. Automatic motion control of protozoa is also achieved by using the image processing technology and fuzzy control method. The control method for rapid turning is also developed. To adopt this method to the automatic motion control program, Paramecium can be controlled along any shaped guide route. The actuation to rotate the micro-impeller (0.5 mm diameter) is achieved by Paramecium. These facts show that protozoa are able to be used as a micro manipulator/actuator.
Simultaneous local optimization and coordination of dynamical large-scale systems

To deal with the computational difficulties existing in the conventional methods for large-scale dynamic optimization problems, the paper presents a novel dynamic problem solver for hierarchical control of a class of large-scale dynamical systems by means of a Hopfield-like neural network (LHCNN). The LHCNN consisting of upper layer coordination neural network (UCNN) and lower layer subsystem optimization neural networks (LONN) has the feature of inherent ease for realization by an analog integrated circuit and the property of global convergence. Moreover, the UCNN and LONN can work simultaneously to give the optimal controls and optimal states. Therefore, the LHCNN has high efficiency and is more suitable for real-time industrial applications.
Towards a Synthesizable Standard-Cell Radio

Radios available today are designed to be high performance devices. These radios require careful design by experienced and skilled RF IC designers, more expensive RF processes, and large chip areas for RF passives. The resulting cost of these devices is at the dollar level without the off chip components, and the careful design required makes integration of these radios with other circuits (microprocessors, sensors, etc) an expensive proposition. We believe that radios that require limited design skills while still having good performance will enable widespread use of wireless technologies. This motivation leads to the design of a fully integrated frequency shift keying (FSK) transceiver and phase-locked loops (PLLs) built with standard cells in a . 18mm CMOS process without any off-chip components. Building a transceiver and PLLs with standard cells dictates that an inverter-based ring oscillator, rather than an LC oscillator, will be used for LO generation. Even though the frequency stability of a ring oscillator poses an obstacle in FSK modulation, this approach reduces the effort required when re-designing the receiver in a different process. Additionally, an inverter-based ring oscillator takes up much less area compared to an LC oscillator. The receiver prototype built in a . 18mm standard CMOS process occupies only 500mm x 350mm of area, has a sensitivity of -76dBm at 10kbps data rate, and consumes 6mW from a single 1.8V supply while operating in 915MHz ISM band. The transmitter prototype built in a . 18mm standard CMOS process includes a power amplifier and a fractional-N all-digital PLL. This fractional-N PLL uses an embedded time-to-digital converter (TDC) with multi-path to increase TDC resolution, and includes digital correction circuitry to resolve issues from clock skew. This PLL prototype occupies 500mm x 500mm of area, generates a 915MHz LO signal from a 10MHz reference, has phase noise of -90dBc/Hz at 1MHz offset and 2.62ps-rms jitter while consuming 4.2mA from a 1.8V supply. Even though this fractional-N all-digital PLL is built almost entirely with standard cells, the performance of this PLL is comparable to other state-of-the-art all-digital PLLs recently published in ISSCC. To illustrate the idea of portability, this transmitter in a . 18mm standard CMOS process is ported to a 65nm CMOS process for completeness and this transmitter takes up 0.04mm 2 . In a fine-line process, a complete transceiver can occupy only 0.1mm 2 of area or smaller.
Modal Impedances and the Boundary Element Method: An Application to Horns and Ducts

Loudspeaker horns, waveguides and other ducts can be simulated by general numerical methods, like the Finite Element or Boundary Element Methods (FEM or BEM), or by a method using a modal description of the sound field, called the Mode Matching Method (MMM). BEM and FEM can describe a general geometry, but are often computationally expensive. MMM, on the other hand, is fast, easily scalable, requires no mesh generation and little memory, but can only be applied to a limited set of geometries. This paper shows how BEM and MMM can be combined in order to efficiently simulate horns where part of the horn must be described by a general meshed geometry. Both BEM-MMM and MMM-BEM couplings are described, and examples given.
Human resource competencies: Responding to increased expectations

© 2007 Wiley Periodicals, Inc. Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/ert.20159 No one doubts that the bar has been raised on human resources. The HR profession began with HR professionals focusing on terms and conditions of work so that employees would feel fairly treated. Today, the business world faces enormous change, and HR professionals must do more than manage employee terms and conditions. As the bar has been raised on HR, some lament that HR professionals cannot meet these higher expectations, and HR should be discounted or downsized and its functions automated or outsourced. We believe that instead of denigrating HR, we should upgrade HR professionals and HR departments to meet the challenges that confront contemporary organizations. To respond to the raised bar, we propose how HR professionals can respond to increased challenges. We begin with a brief synopsis of the business context that raises new expectations of HR, and then we report the results of our research, on over 10,000 respondents around the world, that defines what HR professionals must know and do to deliver value.
Learning to expand internationally : The pace and success of foreign acquisitions

In an era of rapid technological progress and major political and economic transformations accross the globe, the ability to acquire internationally becomes an important skill for internationalizing companies. Cross border mergers and acquisitions are growing rapidly in importance precisely becuase they provide firms with the fastest way of acquiring tangible and intabgible assets in different countries. However due to problems with coordinating and reconfiguring resources in an internationally dispersed network, transferring best practices accross units, retaining key personnel and exchanging knowledge across geographically dispersed units, a lot of international acquisitions fail or underperform. While it is now accepted that learning from acquisition experience is one of the key ways of building successful routines for making acquisitions our understanding of what experiences could be useful for acquiring companies and in what way internationalizing companies learn to benefit from them is limited. The three studies presented in this thesis contributed to prior literature by explicitly addressing those issues. We proposed that in order to understand how organizations learn from their experiences it is not only importanrt to consider the performance of their acquisitions but also the amount of acquisitions that companies can absorb to build workable and usable routines over time.