Miracle-dz/UniFAR-FTUs huggingface dataset:
On the Reliable Modeling of the Collapse and Post-Collapse Behavior of Pipelines

Finite element simulations are nowadays a standard industrial tool for exploring the effect of manufacturing tolerances on the collapse and collapse propagation pressure of tubular goods. Hence, it is of the highest importance that sound computational techniques are used and that the model results are validated using experimental results. Regarding the modeling of steel pipes collapse and post-collapse behavior, in this paper we discuss: applicability of 2D models; shell elements for the 3D models; nonlinearities to include in the models; material modeling; modeling of residual stresses; boundary conditions for simulating different pressure tests; code verification and results validation. Regarding the link between production process and manufacturing tolerances we briefly review some results that we obtained for the case of the UOE process.Copyright © 2009 by ASME
Impact of Discharge Educational Program on Preterm Infants’ Mothers’ Knowledge and Practice

Preterm infant discharge educational programensure best practice and help guide the mothers to appropriate level of care following birth. The aim of the current study was to evaluate the impact of discharge educational program on preterm infant mothers’ knowledge and practice. A multiple time series quasi-experimental research design was utilized. Between March 2018–February 2019, a convenient sample of sixty mothers of preterm infants was recruited from neonatal intensive care unit of El-Monira Pediatric Hospital-Cairo University. These mothers were assigned equally to either the study or control group. Mothers in the study group received foureducational sessions along with hospital routine care; mothers in the control group only received hospital routine care. Mother’s knowledge and practice were assessed during preterm infanthospitalization and post discharge three times usingstructured interview sheet and observational checklist. Results revealed that mothers’ knowledge and practice about preterm infant was in the unsatisfactorylevel for both groups before the program intervention. Mothers’ knowledge and practice total mean scores in the three timespost intervention were significantly higher for studygroup than those in the control group. Conclusion: Discharge educational program can improve mothers’ knowledge and practice to take careoftheir preterm infant.
A modified electrode configuration for brain EIT

Electrical impedance tomography (EIT) of the brain holds great promise for long term non-ionizing detection and imaging of blood flow, ischemia, stroke, and even neuronal activity. One of the most difficult challenges with this modality, however, is overcoming the high impedance of the skull, which severely limits current passage through the intracranial space and washes out the tissue property images. There are situations, however, in which invasive electrode configurations are appropriate to overcome this limitation. We propose the use of a central and circumferential-electrode configuration to improve detection and localization of edema, hemorrhage, and ischemia within the cranium. Results from a simulation study and a phantom experiment verifying the simulation are shown.
Applying selected quality management techniques to diagnose delivery time variability

Purpose – This research seeks to identify and apply techniques that can be used in a supply chain context to diagnose the causes of variability in delivery lead time. Design/methodology/approach – A literature review was conducted and a number of quality management (QM), techniques were selected as candidates for diagnosing delivery time variability. A case study of the application of these techniques is provided on the UK-based defence supply chain that supported UK operations in the Iraq war of 2003. Findings – Candidate QM techniques for diagnosing delivery time variability were identified, namely: Process Chart; Histogram; Failure Mode and Effect Analysis; and Cause and Effect Analysis. These techniques were successful in enabling the diagnosis of the causes of delivery time variability in the context of the case study investigated. Practical implications – The work illustrates how QM techniques can be employed to address issues with supply chains, not least with regard to the important problem of variability in delivery leadtime. In practice, this highlights benefits that result to practitioners in order to improve the performance of operations in a dynamic setting, such as the defence supply chain studied here. Originality/value – This work has value in presenting the findings of an in-depth case study on the application of QM techniques in a multi-echelon supply chain setting. It is also original in employing the FMEA technique together with an end-customer perspective to assess the effect of failure modes in operations across a supply chain. FMEA also provided the means to examine supply chain risk, thus providing a research instrument for deploying risk as a lens. The application of QM techniques in this novel setting provides support for their application beyond the conventional setting of internal operations.
The Intellectual Development of Science and Engineering Students. Part 2: Teaching to Promote Growth

As college students experience the challenges of their classes and extracurricular activities, they undergo a developmental progression in which they gradually relinquish their belief in the certainty of knowledge and the omniscience of authorities and take increasing responsibility for their own learning. At the highest developmental level normally seen in college students (which few attain before graduation), they display attitudes and thinking patterns resembling those of expert scientists and engineers, including habitually and skillfully gathering and analyzing evidence to support their judgments. This paper proposes an instructional model designed to provide a suitable balance of challenge and support to advance students to that level. The model components are (1) variety and choice of learning tasks; (2) explicit communication and explanation of expectations; (3) modeling, practice, and constructive feedback on high‐level tasks; (4) a student‐centered instructional environment; and (5) respect for students at all levels of development.
ACTIVE SUSPENSION CONTROL; PERFORMANCE COMPARISONS USING CONTROL LAWS APPLIED TO A FULL VEHICLE MODEL

Abstract Based on a mathematical model of an actively suspended vehicle, the effects of the following issues in deriving the control laws are studied: (a)representation of the ground surface as integrated or filtered white noise. (b)cross-correlation between left and right track inputs. (c)wheelbase time delay between front and rear inputs. The third of these issues is shown to be by far the most important. Considerable improvements at the rear suspension can be obtained if the control law includes the information that the rear input is simply a delayed version of the front input. Effectively this provides feedforward terms in the control law for the rear actuator. For the full state feedback case, these improvements are indicated by reductions in the rear body acceleration and rear dynamic tyre load of around 20% and 40% respectively with no increase in suspension working space.
Frequency response and electronic testing for constant-temperature hot-wire anemometers

The author aims to identify theoretically and to measure electronically the basic dynamic performance parameters of the constant-temperature hot-wire anemometer. It is found that a well designed anemometer behaves as a third-order control system which allows for a two-parameter optimization of its dynamic response. The cut-off frequency of the anemometer and related dynamic parameters can be estimated by means of electronic square- and sine-wave tests.
Numerical Simulation of Aerodynamics of Train with Broken Windows

Window glass of the train was broken several times when running in the strong wind/sandy areas, causing safety risks to passengers and serious problems to the operation of the train. The aerodynamic performances of the train with broken windows in strong wind condition are uncertain. These problems remain the challenging research issues. To study these issues, the influence of the broken windows on the aerodynamic performances of the train model was analyzed using three-dimensional numerical simulation methods. The results showed that the aerodynamic forces on the second passenger car first decreased and then increased within a very short period when the two middle windows on the windward side had been broken. However, the side force and the overturning moment increased sharply when the wind angle was increasing. In addition, the number of broken window glass has significant effects on train aerodynamics when running in cross wind area, and the absolute value of the side force and of the overturning moment increased significantly with the increase in the number of broken windows on windward side.
Quantifying Performance for the Integrated Project Delivery System as Compared to Established Delivery Systems

AbstractIntegrated project delivery (IPD) is an emerging construction project delivery system that collaboratively involves key participants very early in the project timeline, often before the design is started. It is distinguished by a multiparty contractual agreement that typically allows risks and rewards to be shared among project stakeholders. Because IPD is becoming increasingly popular, various organizations are expressing interest in its benefits to the architecture/engineering/construction (AEC) industry. However, no research studies have shown statistically significant performance differences between IPD and more established delivery systems. This study fills that missing gap by evaluating the performance of IPD projects compared to projects delivered using the more traditional design-bid-build, design-build, and construction management at-risk systems, and showing statistically significant improvements for IPD. Relevant literature was analyzed, and a data collection instrument was developed an.
Simulator Sickness Questionnaire: An enhanced method for quantifying simulator sickness.

Simulator sickness (SS) in high-fidelity visual simulators is a byproduct of modem simulation technology. Although it involves symptoms similar to those of motion-induced sickness (MS), SS tends to be less severe, to be of lower incidence, and to originate from elements of visual display and visuo-vestibular interaction atypical of conditions that induce MS. Most studies of SS to date index severity with some variant of the Pensacola Motion Sickness Questionnaire (MSQ). The MSQ has several deficiencies as an instrument for measuring SS. Some symptoms included in the scoring of MS are irrelevant for SS, and several are misleading. Also, the configural approach of the MSQ is not readily adaptable to computer administration and scoring. This article describes the development of a Simulator Sickness Questiomaire (SSQ), derived from the MSQ using a series of factor analyses, and illustrates its use in monitoring simulator performance with data from a computerized SSQ survey of 3,691 simulator hops. The databas.
Possibility of using a SPAD chlorophyll meter to establish a normalized threshold index of nitrogen status in different potato cultivars

Abstract Leaf SPAD values are thought to be an indicator of potato nitrogen (N) status; however, when making plant N diagnosis, no single threshold leaf SPAD value can be used for all potato cultivars because of cultivar variation. We conducted field experiments over 3 years to test whether the difference in SPAD values between the upper and lower leaves was consistent among potato cultivars, and whether this value responded to N application levels. The results showed cultivar affects the SPAD values of the fourth and eighth leaves (SPADL4 and SPADL8), but not SPADL4-8, the difference between SPADL4 and SPADL8. Moreover, the SPADL4-8 values responded well to N application levels. Therefore the SPADL4-8 could be applied as a general index of N status across different potato cultivars, and establishing a threshold SPADL4-8 value might be more useful in guiding N fertilization recommendations for different potato cultivars.
Pilot study of the wrist orthosis design process

Purpose – The purpose of this paper is to describe a manufacturing methodology for a wrist orthosis. The case study aims to offer new approaches in the area of human orthoses. Design/methodology/approach – The article describes the utilization of rapid prototyping (RP), passive stereo photogrammetry and software tools for the orthosis design process. This study shows the key points of the design and manufacturing methodology. The approach uses specific technologies, such as 3D digitizing, reverse engineering and polygonal-surface software, FDM RP and 3D printing. Findings – The results show that the used technologies reflect the patient's requirements and also they could be an alternative solution to the standard method of orthosis design. Research limitations/implications – The methodology provides a good position for further development issues. Practical implications – The methodology could be usable for clinical practice and allows the manufacturing of the perfect orthosis of the upper limb. The usage .
Information content of time domain reflectometry waveforms

The possibility to link model parameters with soil properties is obstructed if identification problems in inverse modeling of time domain reflectometry (TDR) waveforms occur. Therefore multiple objective functions, each associated with one model parameter, are sought for identification of probe (resistance and length) and Debye (static permittivity, high‐frequency permittivity, relaxation frequency, and bulk electrical conductivity) parameters in TDR waveforms. An objective function could be defined for all six model parameters. Some of the defined objective functions correspond with theoretical and experimental observations of earlier work. Other new insights have been obtained. For instance, it is possible to obtain estimates of high‐frequency permittivity even when the reflection of the end of the probe has vanished because of high salinity. Application of the found objective functions on measured TDR waveforms yielded parameter values that compared well with values obtained from several references. However, identification of a parameter is only possible if its true value lies within the frequency bandwidth of TDR.
Managing Irrigation Water by Yield and Water Productivity Assessment of a Rice-Wheat System Using Remote Sensing

AbstractRice and wheat are very important grain crops and are heavily grown in lands between the Ravi and Chenab Rivers in Pakistan. Because rice is generally cultivated under standing water conditions, careful estimation of actual water consumption and crop water productivity (CWP) is key for proper water management. In the current study, an effort is made to estimate actual evapotranspiration (ETa) by using the soil and energy balance algorithm (SEBAL), which used the moderate-resolution imaging spectroradiometer (MODIS) satellite with a spatial resolution of 1,000 m. Rice and wheat crop dominance areas were identified by using the ISODATA crop classification technique by utilizing MODIS normalized difference vegetation index (NDVI) 250 m resolution data. Crop-specific ETa was masked out both for rice and wheat, and this information was utilized with crop yield for estimation of CWP. Tehsil administrative-level crop-yield data were collected and extrapolated to model crop yield on a pixel basis by benef.
Elastohydrodynamics and Mechanics of Rectangular Elastomeric Seals for Reciprocating Piston Rods

A numerical model was developed to study the sealing performance of rectangular elastomeric seals for reciprocating piston rods used in linear hydraulic actuators. The model takes into account a large number of parameters and has been applied in the study of seals for aircraft actuation assemblies in a broad range of temperatures (-55°C to +135°C) and sealed pressures (1-50 MPa or more). The model is used to calculate the contact pressures and film thickness maps as well as the leakage rates and friction far the dynamic or static contact between a seal and a reciprocating piston rod, aiming at the minimization of both the leakage and the wear of the seals.
Nondestructive Evaluation of the I-40 Bridge over the Rio Grande River

A nondestructive strength evaluation of the I-40 bridge over the Rio Grande River in Albuquerque, New Mexico (United States) was completed for the New Mexico Department of Transportation (NMDOT). The I-40 bridge is a precast, prestressed concrete girder bridge located within 3 miles of the "Big I" interchange carrying Interstates I-40 and I-25. Because of it's location, the I-40 bridge is subjected to large amounts of heavy truck traffic. The primary objective of the study reported in this article was to determine a more accurate capacity rating for the I-40 bridge and thus, reduce the number of overweight vehicle permit denials. To achieve this objective, a conventional rating analysis is first performed based on American Association of State Highway and Transportation Officials (AASHTO) guidelines. A diagnostic load test and a finite-element analysis are then completed. Details of the AASHTO rating analysis as well as the approach by which measured girder strains from the load test and finite-element results were considered in the capacity rating of the I-40 bridge are discussed. Findings from the study confirmed that the capacity ratings of the I-40 bridge could be safely increased by a factor of 1.7.
Study on Noncondensing Air-Conditioning System Performance When Combining a Desiccant Cooling System with a CO2 Heat Pump

In hot and humid climates, dampness in buildings leads to significant microbial pollution and building damage. In order to alleviate this problem, a desiccant cooling system was suggested as a suitable system to improve indoor air quality (IAQ) based on its superior humidity control. However, such systems have lower energy efficiency, so their combined use with a solar hot water/air supply system or a cogeneration system is common to improve energy efficiency. In this paper, the authors studied the possibilities and methods of combining a desiccant cooling system with a CO2 heat pump to improve overall energy efficiency and provide a steady heat source. The authors also studied the adaptability of the system under a midsummer climate and evaluated the performance of thermal comfort, IAQ, and energy efficiency using the experimental and performance data of the CO2 heat pump.
Short Period Undulators for Storage Rings and Free Electron Lasers

Short period undulators have the potential to enhance the spectral performance of synchrotron radiation sources significantly. These devices open the range of brilliant hard X-rays at medium energy storage rings, their implementation may reduce the facility length of linac based FELs and they are an essential prerequisite for laser plasma accelerator based FELs. The development of cryogenic permanent magnet undulators has started and the first devices, employing period lengths around 18mm, have been installed in 3rd generation storage rings. Ambitious magnet designs permit even smaller period lengths which improve their performance further. The paper discusses the performance of cryogenic permanent magnet undulators in comparison with superconducting undulators.
An alternative derivation of the Gordon-Haus effect

One of the limitations on the achievable data rate of soliton lightwave systems at fixed distance, or on the achievable distance at a fixed data rate, is a timing jitter that is caused by the interaction of the soliton pulses with spontaneous emission noise. An elementary derivation of the Gordon-Haus effect that does not require prior knowledge of any of the more advanced concepts used in the original derivation is presented. >
MEASUREMENT OF SHAPE OF CAVITY ON A MODEL PROPELLER BLADE

In order to improve theoretical prediction of propeller induced pressure fluctuations, it is indispensable to investigate the behaviour of unsteady cavity on the propeller blades, since the pressure fluctuations are roughly in proportion to the second time derivative of the cavity volume. To this end, several methods of measuring cavity shape have been proposed such as using stereo photography, pin gauge and laser beam scattering.This paper describes a highly advanced method of measuring the three-dimensional cavity shape using a laser beam coupled with a CCD (Charge Coupled Device) camera and image processor to make measurement faster and more detailed. Model experiments on two propellers-a conventional and a highly skewed propeller-of a training ship SEIUN-MARU have endorsed the usefulness of the present measurement technique both in its speed and accuracy.Further, some features of cavity behaviour of highly skewed propellers have been found in terms of cavity thickness distribution and its variation over the blades and the blade angle positions.
Numerical simulation of hydrodynamics in a pump-turbine at off-design operating conditions in turbine mode

The hydrodynamics of a reduced-scaled model of a radial pump-turbine is investigated under off-design operating conditions, involving runaway and "S-shape" turbine brake curve at low positive discharge. It is a low specific speed pump-turbine machine of Francis type with 9 impeller blades and 20 stay vanes as well as 20 guide vanes. The computational domain includes the entire water passage from the spiral casing inlet to the draft tube outlet. Completely structured hexahedral meshes generated by the commercial software ANSYS-ICEM are employed. The unsteady incompressible simulations are performed using the commercial code ANSYS-CFX13. For turbulence modeling the standard k-ε model is applied. The numerical results at different operating points are compared to the experimental results. The predicted pressure amplitude is in good agreement with the experimental data and the amplitude of normal force on impeller is in reasonable range. The detailed analysis reveals the onset of the flow instabilities when the machine is brought from a regular operating condition to runaway and turbine break mode. Furthermore, the rotating stall phenomena are well captured at runaway condition as well as low discharge operating condition with one stall cell rotating inside and around the impeller with about 70% of its frequency. Moreover, the rotating stall is found to be the effect of rotating flow separations developed in several consecutive impeller channels which lead to their blockage. The reliable simulation of S-curve characteristics in pump-turbines is a basic requirement for design and optimization at off-design operating conditions.
Emotional Intelligence and Leadership Styles in Construction Project Management

Human factors are of paramount importance to the success of projects. Although a lot of studies have been carried out on human factors in project management, not much research has been done on emotional intelligence (EI). Studies have shown that EI is beneficial to both the individual and the organization. The benefits of EI to project management were investigated in terms of the style of leadership. The study was conducted in Thailand by interviewing project managers and engineers (PMEs); and client representatives. The results showed that EI affected leadership behavior of the project leader. PMEs with higher EI tend to use open communication and proactive leadership styles. It is also found that EI generates delegating, open communication, and proactive behavior, which can bring positive outcomes to the organization.