Miracle-dz/UniFAR-FTUs huggingface dataset:
The Impact of Social Network Site Use on Young Adult Development: Extending the Research Beyond Time Use and Considering the Role of Self-Disclosure Motivations

Young adults spend a good deal of time using social network sites (SNSs), and the consequences of this activity have come under considerable scrutiny in research. There is some evidence that SNSs offer a context for young adults to engage in self-disclosure, and that such behavior may contribute to their development. In the current study, self-disclosure motivations were explored as a moderator of the relationship between SNS time use and indicators of adjustment. It was hypothesized that the relationships between SNS time use and three indicators of young adult adjustment (belonging, self-concept clarity, and flourishing) would be moderated by self-disclosure motivations. Data were collected using a cross-sectional survey of 524 young adults aged 17–25 years (Mean age = 19.75; SD = 2.16) who used at least one social network site daily (Mean hours of daily use = 3.25; SD = 1.67). The relationships between SNS time use and both belonging and flourishing were moderated by self-disclosure motivations. Specifically, when participants were low or moderately motivated to self-disclose (for relationship maintenance or self-presentation purposes) SNS time use was negatively related to belonging and flourishing. Whereas when participants were highly motivated to self-disclose there was no significant relationship between SNS time use and belonging and SNS time use and flourishing. Additionally, there was no significant moderation of the relationship between SNS time use and self-concept clarity. Based on these findings, we recommend that in order for young adults to reap potential benefits of spending time online they should endeavor to use SNSs for purposes that promote positive self and relational development.
School and the community: Managing disruptive learner behaviour in rural learning ecologies

Managing disruptive learner behaviour has for many years been a matter of concern to school administrators, teachers and parents. In Zimbabwe, teaching and learning processes have been affected by serious interference that has adversely affected the learners and the teachers. The research question addressed in this study relates to the strategies that can be utilised by communities and schools with a view of managing disruptive learner behaviour in rural learning ecologies. To answer the research question, we used a participatory action research design. This community-based qualitative study was underpinned by the critical consciousness concept that can be described as central to the application of critical thinking. Data were generated utilising focus-group discussions and reflective narratives with teachers and parents and analysed following Fairclough’s (1992) critical discourse analysis. The findings suggest that disruptive learner behaviour in rural schools could potentially be managed through parental involvement, the use of problem-solving approaches, learner participation in all school programmes and the antecedent-behaviour-consequence approach. The study concluded that disruptive learner behaviour should be properly managed within and out of school to achieve meaningful teaching and learning.
Visualizing Travel Patterns with a GPS Dataset: How Commuting Routes Influence Non-Work Travel Behavior

This paper examines the spatial patterns of non-work activities for 34 drivers in the Southeast Michigan region. Capitalizing upon a unique global positioning systems (GPS) dataset and GIS visualization techniques, this study quantifies the spatial distributions of non-work activities for drivers with different commuting distances, and for non-work activities that are chained in different types of travel (commute travel vs. non-commute travel). We find a strong dependence of non-work activity locations on commuting distances, and an influence of commuting routes on non-work activities chained in all types of travel. The results underline the importance of commuting routes in shaping the spatial configuration of non-work activities.
Possible performance of capacitively coupled single‐electron transistors in digital circuits

We have carried out a theoretical analysis of the possible performance of single‐electron transistors with capacitive coupling in simple logic and memory circuits. Both resistively loaded and complementary transistors have been analyzed, with a detailed account of parasitic factors including thermal fluctuations and background charge variations. The analysis shows that at optimal values of the parameters including the background charge, the maximum operation temperature is close to 0.025e2/CkB, where C is the capacitance of the smallest tunnel junction. At T∼0.01e2/CkB the parameter margins are relatively wide; for the structures with 2‐nm minimum feature size, the latter temperature is close to 77 K. A typical margin for background charge fluctuations is on the order of 0.1e; these fluctuations may be a major obstacle for practical ultradense single‐electron circuits.
Innovative First Year Aerospace Design Course at MIT

Students at MIT typically take major‐specific courses beginning with their second year of studies. For the first year students eager to begin their aerospace education and to help those students unsure about selecting aerospace engineering as their major field, the MIT Department of Aeronautics and Astronautics offers an elective course, Introduction to Aerospace and Design. The course makes use of the new opportunities offered by the World Wide Web and provides students a real engineering experience through the hands‐on, Lighter‐Than‐Air (LTA) vehicle design project. The course teaches the basic concepts of aeronautics, includes lectures on design, and gives an overview of astronautics. The flexibility inherent in the World Wide Web allows us to accommodate the needs of students who require a review of the fundamentals in addition to in‐ class lecture material and the needs of others who desire to learn advanced material beyond what is presented in lecture. A Web‐based Discussion Forum greatly facilitated interaction among students, resulting in better vehicle designs and a friendlier classroom environment. The course culminates in an LTA vehicle design competition in which teams of five to six students design and build radio‐controlled blimps measuring up to 5 meters in length. The vehicles are flown around the perimeter of a basketball court with the objective of carrying a maximum amount of payload in a minimum amount of time. The students are introduced to real‐world engineering practice through oral presentations of their preliminary designs and critical designs in front of a faculty jury. Towards the end of the course, the students are required to submit a design portfolio showing how their LTA vehicles took shape via their individual and team efforts. The students are permitted to examine previous designs and improve upon them, yielding better vehicles every year. Results from a survey indicated that the freshmen felt much more comfortable working on technical problems with no clear answers as well as designing and building a device from an assortment of given parts.
Recent Recruiting Trends and Their Implications: Preliminary Analysis and Recommendations

Abstract : The Department of Defense (DoD) has consistently met its accession requirements since the beginning of the drawdown in the armed forces. However, certain indicators have raised some concerns, particularly for the longer term. The services are reporting increased difficulty in meeting their monthly enlistment contract goals, which include not only persons who will access within 30 days but those accessing in the next two to twelve months. This could portend future shortages. Moreover, according to DoD, the proportion of youth indicating that they are likely to enlist in the future has fallen sharply since the beginning of the drawdown. It is important to determine whether such indicators presage a serious reduction in enlistment supply. This concern is heightened by the fact that accessions were reduced well below the level required to sustain the armed forces during the drawdown. This research was undertaken in order to determine if these possible trends are significant, and if so, and their impact upon Army planning and manpower needs.
Get Ready for Take-Overs: Using Head-Up Display for Drivers to Engage in Non–Driving-Related Tasks in Automated Vehicles

Objective The study aims to investigate the potential of using HUD (head-up display) as an approach for drivers to engage in non–driving-related tasks (NDRTs) during automated driving, and examine the impacts on driver state and take-over performance in comparison to the traditional mobile phone. Background Advances in automated vehicle technology have the potential to relieve drivers from driving tasks so that they can engage in NDRTs freely. However, drivers will still need to take-over control under certain circumstances. Method A driving simulation experiment was conducted using an Advanced Driving Simulator and real-world driving videos. Forty-six participants completed three drives in three display conditions, respectively (HUD, mobile phone and baseline without NDRT). The HUD was integrated with the vehicle in displaying NDRTs while the mobile phone was not. Drivers’ visual (e.g. gaze, blink) and physiological (e.g. ECG, EDA) data were collected to measure driver state. Two take-over reaction times (hand and foot) were used to measure take-over performance. Results The HUD significantly shortened the take-over reaction times compared to the mobile phone condition. Compared to the baseline condition, drivers in the HUD condition also experienced lower cognitive workload and physiological arousal. Drivers’ take-over reaction times were significantly correlated with their visual and electrodermal activities during automated driving prior to the take-over request. Conclusion HUDs can improve driver performance and lower workload when used as an NDRT interface. Application The study sheds light on a promising approach for drivers to engage in NDRTs in future AVs.
Quality Assurance Program for Work-Zone Traffic Control

A quality assurance program was developed and implemented by the New York State Department of Transportation to manage work-zone traffic control on department projects. Using a standardized process, a team of experienced engineers inspects a large sample of projects across the state each year. Standard rating forms are completed to describe the temporary traffic control observed on each project. “Emphasis points,” which describe recurring areas of concern, are evaluated on each project, and a quality rating is assigned using a standardized six-point 0 to 5 scale to describe the overall condition and effectiveness of the project. Quality goals have been established both for average ratings for regional program areas and for individual projects. Implementation of this quality assurance program over the past 14 years has led to a substantial improvement in the quality of work-zone traffic control on New York State projects.
Coating of Tomatoes (Solanum lycopersicum L.) Employing Nanoemulsions Containing the Bioactive Compounds of Cactus Acid Fruits: Quality and Shelf Life

This study was aimed at evaluating the effect of a nanoemulsion containing the bioactive compounds of orange essential oil and xoconostle (Opuntia oligacantha C.F. Först) on maintaining and improving the quality of the shelf life of tomato fruits. The nanoemulsion was applied as a coating on the whole fruits during physiological maturity; the treatments were thus: Control 1 without coating (C1); Control 2 with food-grade mineral oil coating (C2); and nanoemulsions that were diluted with mineral oil at 2.5% (DN2.5), 5% (DN5), 10% (DN10), and 20% (DN20). Further, the following parameters were determined for 21 days: the percentage weight loss, firmness, colour, pH, titratable acidity, total soluble solids, ascorbic acid content, total phenols, flavonoids, tannins, antioxidant activities DPPH and ABTS, and the histological evaluation of the pericarp of the fruits. Significant differences (p < 0.05) were observed during the treatments; DN10 and DN20 obtained the best weight loss results (3.27 ± 0.31% and 3.71 ± 0.30%, respectively) compared with C1 and C2. The DN5 and DN20 textures exhibited the highest firmness (11.56 ± 0.33 and 11.89 ± 1.04 N, respectively). The antioxidant activity (DPPH on Day 21) was higher in the DN20 treatment (48.19 ± 0.95%) compared with in C1 (39.52 ± 0.30%) and C2 (38.14 ± 0.76%). Histological evaluation revealed that the nanoemulsion coating allowed a slower maturation of the cells in the pericarp of the fruits. The nanoemulsion, as a coat, improved the quality and valuable life of the tomato regarding its physicochemical and antioxidant properties, thus availing an effective alternative for conserving this fruit.
Evaluating Green Performance of Suppliers via Analytic Network Process and TOPSIS

Developments in environmental issues in the last few years have been forcing manufacturing companies to improve their environmental performances. Many firms developed integrated relationships with their suppliers to increase their environmental performance and to decrease their hazardous effects on the environment. Then, selecting suitable and green suppliers in the supply chain has become a key strategic consideration. A performance evaluation system for green suppliers is necessary to determine the suitability of suppliers to cooperate with the firm. Therefore, in this study, a model for evaluating green performance of suppliers is proposed, and a hybrid multicriteria decision making model is developed in order to evaluate green performance of the suppliers. The analytical network process technique is applied to handle the relationships and dependence of selection criteria and subcriteria and determine weights of the criteria. The technique for order preference by similarity to ideal solution is used to sequence the suppliers for ideal solution of the suppliers’ green performance evaluation problem. After a comprehensive literature survey, evaluation criteria of green performance for suppliers are determined. Finally, green performance of 18 suppliers of an automobile company was evaluated by this model. These 18 suppliers manufacture chassis and its components.
Correlation between Ion Composition of Oligomineral Water and Calcium Oxalate Crystal Formation

The ion content of drinking water might be associated with urinary stone formation, representing a keystone of conservative nephrolithiasis management. However, the effects of specific ions on calcium oxalate crystal formation and their mechanism of action are still highly controversial. We report an investigation of the effects of oligomineral waters with similar total salt amount but different ion composition on calcium oxalate (CaOx) precipitation in vitro, combining gravimetric and microscopic assays. The results suggest that the “collective” physicochemical properties of the aqueous medium, deriving from the ion combination rather than from a single ionic species, are of importance. Particularly, the ability of ions to strengthen/weaken the aqueous medium structure determines an increase/decrease in the interfacial energy, modulating the formation and growth of CaOx crystals.
Experimental Investigation on Flow Characteristics in a Turbine Rotor-Stator Cavity with Inlet at Low Radius

An experimental investigation has been designed and performed to determine the fluid flow characteristics in a rotor-stator cavity with large gap ratio and inlet at low radius. In this investigation, the particle image velocimetry (PIV) technique is employed for the velocity measurements of airflow in the rotor-stator cavity. Local swirl ratios are calculated from these velocity distributions. A range of parameter combinations of interest in fluid flow characteristics is covered, including combinations of variations in axial location, rotational Reynolds number (denoted as Re φ ), and inlet nondimensional mass flow rate (denoted as C W ). The results indicate that the flow in the rotor-stator cavity is still dominated by circumferential motion. The velocity is basically unchanged along the circumference. However, the velocity increases with the increase of radial position. In different axial positions, the velocity distribution is different. The closer to the rotor, the more uneven the flow in the rotor-stator cavity is. The disturbance of the rotor rotating motion to the fluid mainly occurs in the high radius region, which should be paid more attention to in the process of reforming the flow field characteristics. To the circumferential velocity of low radius fluid, the Re φ is in direct proportion, while the C W is in inverse. The swirl ratio in the core region is very close to that in the high radius near the wall region of the rotor, which can be inferred to be caused by the backflow in the rotor-stator cavity.
The Hardness Evolution of Cast and the High-Cycle Fatigue Life Change of Wrought Ni-Base Superalloys after Additional Heat Treatment

Concerning the use of modern technologies and manufacturing systems in the production of high-stress components from Ni-base superalloys and the optimization of the production process, knowledge of the microstructure–mechanical properties relationship is very important. The microstructure of Ni-base superalloys is very closely related to the chemical composition. With the high number of alloying elements, various phases are presented in the structure of Ni-base superalloys, which have a predominantly positive effect on the mechanical properties, but also phases that reduce, in particular, the heat resistance of these materials. The aim of the presented paper is the quantification of structural parameters of two types of cast alloys, ZhS6K and IN738, where the effect of dwell at 10 and 15 h at 800 °C on the change in morphology and volume fraction of the γ′-phase precipitate was studied. The detected changes were verified by the Vickers hardness test. The IN718 superalloy was chosen as a representative of the wrought superalloy. This alloy was also annealed for 72 h at a temperature of 800 °C, and the quantification of structural parameters was performed by EDS mapping and TEM analysis. Another partial goal was to assess the effect of changes in the volume fraction of the γ′-phase and δ-phase on the change in the high-cycle fatigue life of superalloy IN 718. This superalloy was tested by dynamic cyclic loading with cycle asymmetry parameter R = −1 at an ambient temperature of 22 ± 5 °C and at a temperature of 700 ± 5 °C and with cycle asymmetry parameter R < 1 (three-point bending load) after annealing at 700 °C/72 h. The results of the quantitative analyses and fatigue tests will be further used in optimizing the design of Ni-base superalloy components by modern technologies such as additive technologies for the production of turbine blades and implemented within the philosophy of Industry 4.0.
An Experimental-Numerical Procedure for Stuffing Box Packing Characterization and Leak Tests

The sealing of valve stems is ensured by the traditional systems of packed stuffing boxes. The performance of this type of sealing system, which is also used in rotating equipment, is dependent on the radial contact pressures generated by the packing axial compression. The mechanical behavior of a packing seal is characterized by the transmission ratio of the radial stress over the axial stress known as the lateral pressure coefficient, which is one of the required parameters used to select packing seals. However, the modeling of the packed stuffing box requires the knowledge of other packing seal mechanical characteristics such as compression modulus and Poisson's ratio. In this paper, the mechanical characteristics of packing seals are obtained using a hybrid experimental-numerical procedure. The experimental study is carried out on an instrumented stuffing box packing test bench. The tests results of the experiments are coupled to the ones obtained by a finite element simulation of the test rig to determine the packing seal mechanical characteristics. Two packing types are used: one based on Teflon and the other one based on flexible graphite. In addition, leak rates are measured.for different axial compressive stresses and gas pressures in order to estimate the tightness performance of such seals.
Hydrodynamic and foundation interaction effects in dynamics of intake towers; Earthquake responses--

The dynamic response of Briones dam intake tower to Taft ground motion is presented for various cases: rigid and flexible foundation rock, with and without water. Study of these response results demonstrates that the earthquake response of this tower is increased because of hydrodynamic effects and decreased as a result of tower-foundation-soil interaction. It is also demonstrated that the earthquake response of this tower can be computed to a satisfactory degree of accuracy by considering the contributions of only the first two natural vibration modes. This observation provides a basis for developing a simplified analysis procedure suitable for practical application.
Stabilization of oscillator phase using a fiber-optic delay-line

The authors describe an electronic oscillator phase stabilizer based on a fiber-optic delay-line. Excellent agreement between calculated and first experimental results was obtained for this fiber-optic stabilized electronic oscillator (FOSO) at 100 MHz and 7.8 GHz. Expressions are derived for the FOSO phase noise performance and optimum fiber length, based on the noise contributions of the various components. The predicted performance of the FOSO expected with improved system components is also calculated. The FOSO is tunable over an extremely wide frequency range, with phase noise performance rivaling that of good resonant-cavity stabilized oscillators, which are constrained to narrowband operation. <<ETX>>
Optimization of 4-Anilinoquinolines as Dengue Virus Inhibitors

Emerging viral infections, including those caused by dengue virus (DENV) and Venezuelan Equine Encephalitis virus (VEEV), pose a significant global health challenge. Here, we report the preparation and screening of a series of 4-anilinoquinoline libraries targeting DENV and VEEV. This effort generated a series of lead compounds, each occupying a distinct chemical space, including 3-((6-bromoquinolin-4-yl)amino)phenol (12), 6-bromo-N-(5-fluoro-1H-indazol-6-yl)quinolin-4-amine (50) and 6-((6-bromoquinolin-4-yl)amino)isoindolin-1-one (52), with EC50 values of 0.63–0.69 µM for DENV infection. These compound libraries demonstrated very limited toxicity with CC50 values greater than 10 µM in almost all cases. Additionally, the lead compounds were screened for activity against VEEV and demonstrated activity in the low single-digit micromolar range, with 50 and 52 demonstrating EC50s of 2.3 µM and 3.6 µM, respectively. The promising results presented here highlight the potential to further refine this series in order to develop a clinical compound against DENV, VEEV, and potentially other emerging viral threats.
Development and implementation of a time- and computationally-efficient methodology for reconstructing real-world crashes using finite element modeling to improve crash injury research investigations

Abstract Eleven Crash Injury Research and Engineering Network (CIREN) frontal crashes were reconstructed using a novel, time-efficient methodology involving a simplified vehicle model. Kinematic accuracy was assessed using novel kinematic scores between 0-1 and chest injury was assessed using literature-defined injury metric time histories. The average kinematic score across all simulations was 0.87, indicating good kinematic accuracy. Time histories for chest compression, rib strain, shoulder belt force, and steering column force discerned the most causative components of chest injury in all cases. Abbreviated Injury Scale (AIS) 2+ and AIS 3+ chest injury risk functions using belt force identified chest injury with 81.8% success.