Miracle-dz/UniFAR-FTUs huggingface dataset:
An Investigation and Correction Method of Stationary Fan CFD MRF Simulations

A common fan model to use in automotive underhood simulations is the Multiple Reference Frame (MRF) model and within the industry, for this specific application, this model is well known to under-predict performance. In a former paper, referenced 2009-01-0178, a simple 'speed correction' of the MRF model was proposed by the authors. The correction was shown to apply across different operating speeds for a specific fan. In this paper the generality and limitation of this correction across fans of different type, design and dimensions are investigated. Investigated in this paper is as well the sensitivity of the MRF model to specific methodology of use. In this paper it is shown that the speed correction of 14% proposed in the former paper applies widely, hence, although the MRF model is erroneous the error is consistent. A 680 mm fan of the similar design to the default (750 mm) choice was simulated and tested, in addition a different 750 mm fan with a more mixed flow design was simulated and tested, and the correction of 14% was shown to apply for these two fans as well. Furthermore is it also shown that the consistency of the MRF model applies with a consistent methodology of use; in its design, the MRF model needs a dedicated rotational volume around the rotating part, this needs to be chosen consistently by the end-user of the CFD software to achieve a consistent behavior of the MRF model. In this paper we show the sensitivity to the results done by the specific choice of rotational domain. In this paper a wiser choice of MRF region resulted in a significant drop in error and for this methodology a speed correction of only 8% was necessary.
Development of Flight Units for Thermal Control Coatings Experiment.

Abstract : The objective of the program is to design, fabricate, and test experimental flight packages capable of measuring the long term degradation of solar absorptance of thermal control coatings (TCC) in the space environment. Use of these highly accurate flight units will allow correlation of the performance of experimental TCC in the actual space environment with that exhibited in laboratory in situ simulated space environments. Six experiment packages capable of testing eight TCC surfaces each on an orbiting spacecraft have been developed. Each package weighs 430 grams, consumes 350 mw of power, operates from 28 plus or minus 5V, and provides a 0-5 V telemetry output with an overall accuracy of plus or minus 1F. A prototype flight unit successfully passed thermal cycling, shock, vibration and humidity test qualifications. (Author)
Theoretical and Experimental Data for a Number of NACA 6A-Series Airfoil Sections

The NACA 6a-series airfoil sections were designed to eliminate the trailing-edge cusp which is characteristic of the NACA 6a-series sections. Theoretical data are presented for NACA 6a-series basic thickness forms having the position of minimum pressure of 30, 40, and 50 percent chord and with thickness ratios varying from 6 percent to 15 percent. Also presented are data for a mean line designed to maintain straight sides on the cambered sections.
The Effect of Supportive Counseling on Mother Psychological Reactions and Mother–Infant Bonding Following Traumatic Childbirth

Abstract Women experienced traumatic childbirth talk about the lack of opportunity to express their worries and stresses. However, providing psychological support to reduce the long-term and severe consequences is essential. The present study aimed to determine the effect of supportive counseling on mother psychological reactions and mother-infant bonding following traumatic childbirth. This quasi experimental study was performed on 166 postpartum women with psychological birth trauma admitted to public hospitals in Arak, Iran. Postpartum bonding questionnaire was filled before hospital discharge. The women were randomly assigned into the intervention and control groups. The intervention group (n = 83) received individual supportive counseling for two in-person sessions before hospital discharge, and 10–15 days after delivery and a telephone consultation during 4–6 weeks after delivery. The data were collected using Edinburgh Postnatal Depression Scale, Post-Traumatic Stress Disorder checklist for DSM-5 (PCL-5), and the postpartum bonding questionnaire, after 2 months. The data were analyzed using SPSS21 software and chi-square, t-test, and ANCOVA were used. The mean score of postpartum depression (PPD) symptoms in the intervention group was significantly lower than that in the control group (MD: −13.40, 95% CI: −10.66 to −16.15, P < 0.001). The severity of the PTSD symptoms in the intervention group was significantly lower than that in the control group (MD: −6.37, 95% CI: −3.55 to −9.18, P = 0.04). The mean (SD) of mother-infant bonding after controlling the effect of baseline score indicated a significant difference between the two groups (MD: −7.82, 95% CI: −6.53 to −9.11, P < 0.001). The supportive counseling seems to be effective in reducing PPD and PTSD symptoms, and improving postpartum bonding after traumatic childbirth. The use of group supportive counseling with other time intervals and long follow-up period is recommended. Further, other intervention approaches should be used for preventing the progression of psychological birth trauma toward PTSD.
Design Techniques for High-Frequency CMOS Integrated Circuits: From 10 GHz To 100 GHz

Technology developments have made CMOS a strong candidate in high-frequency applications because of its low power, low cost and higher-level integration. However, as an essential element in an RF building block, a CMOS device is not as good as a BJT device in terms of speed and a HEMT device in terms of noise performance. Therefore, conventional low-frequency design techniques for CMOS circuits may not satisfy the requirements for high-frequency applications wherein the operating frequencies get close to the cut-off frequency of a CMOS device. This research work explores design techniques for various high-frequency circuits at 10 GHz, 60 GHz and up to 110 GHz. Individual building blocks including low-noise amplifiers, voltage-controlled oscillators, high-frequency true-single-phase-clock frequency dividers, and mm-wave amplifiers are studied thoroughly using both theoretical analysis and practical circuit designs. Related fundamental techniques, such as MOS device modeling and de-embedding techniques, are also explored. Furthermore, as a prototype of system-level integration, a Ku-band LNB front-end is implemented for the application of a satellite receiver.
A Computer System for Investigating and Building Synthetic Auditory Spaces-Part I

Part 1 of this paper [1] described a preliminary system topology for the creation of auditory “scenes” – twoand three-dimensional synthetic acoustic environments using a MIDI-controlled collection of parallel hardware-based DSP devices. This paper describes Version 2 of this system which includes custom DSP components based on Max/MSP. The system topology, implementation and usage are described.
Bemessung im Mauerwerksbau nach EC 6 — wie geht es weiter?

Nachdem die im Mauerwerksbau gültigen nationalen Normen zunächst in einer neuen Normenreihe DIN 1053‐11 bis DIN 1053‐14 aktualisiert, an den Stand der Technik und den in den nächsten Jahren verbindlich werdenden Eurocode 6 angepasst werden sollten, hat sich mittlerweile der Druck zur Einführung der Eurocodes in Deutschland erhöht. Eine An wendung der Eurocode‐Normen ist nur mit den für das jeweilige Land gültigen Nationalen Anhängen möglich. Deshalb beschloss das Lenkungsgremium des Fachbereichs 06 “Mauerwerkbau” dem Entwurf der Nationalen Anhänge zu Eurocode 6 den Vorrang zu geben und mit Hochdruck an deren Fertigstellung zu arbeiten.
Dynamic Recovery: GABA Agonism Restores Neural Variability in Older, Poorer Performing Adults

Aging is associated with cognitive impairment, but there are large individual differences in these declines. One neural measure that is lower in older adults and predicts these individual differences is moment-to-moment brain signal variability. Testing the assumption that GABA should heighten neural variability, we examined whether reduced brain signal variability in older, poorer performing adults could be boosted by increasing GABA pharmacologically. Brain signal variability was estimated using fMRI in 20 young and 24 older healthy human adults during placebo and GABA agonist sessions. As expected, older adults exhibited lower signal variability at placebo, and, crucially, GABA agonism boosted older adults' variability to the levels of young adults. Furthermore, poorer performing older adults experienced a greater increase in variability on drug, suggesting that those with more to gain benefit the most from GABA system potentiation. GABA may thus serve as a core neurochemical target in future work on aging- and cognition-related human brain dynamics. SIGNIFICANCE STATEMENT Prior research indicates that moment-to-moment brain signal variability is lower in older, poorer performing adults. We found that this reduced brain signal variability could be boosted through GABA agonism in older adults to the levels of young adults and that this boost was largest in the poorer performing older adults. These results provide the first evidence that brain signal variability can be restored by increasing GABAergic activity and suggest the promise of developing interventions targeting inhibitory systems to help slow cognitive declines in healthy aging.
Using Environmental, Social, Governance (ESG) and Financial Indicators to Measure Bank Cost Efficiency in Asia

Environmental, social, and governance (ESG) practices have been used as non-financial indicators to measure bank performance worldwide in the last decade. The United Nations (UN) has specified 17 Sustainable Development Goals (SDGs) for the implementation of these ESG concepts. However, it remains unclear whether the costs of ESG have exceeded the benefits. The purpose of this study is to examine the impact of ESG on the cost efficiency of developed and developing Asian banks using a two-step approach comprising stochastic frontier analysis (SFA) and stochastic metafrontier analysis (SMF). The data sample from 2015 to 2018 is separated into two groups: 60 Asian developed economies and 85 developing economies. The results show that banks in the developed Asian economies become more cost-efficient through environmentally friendly activities. The banks in the developing Asian economies increase their cost efficiency by socially responsible activities and improved governance. Moreover, banks in the developed Asian economies outperformed those in the developing Asian economies in terms of technology gap ratio (TGR) and metafrontier cost efficiency (MCE). The results of this study benefit not only investors and bank managers but also the entire banking sector and the world economy.
Investigating a transdisciplinary collaborative service delivery approach in addressing learners experiencing barriers to learning

i DECLARATION . iii ACKNOWLEDGEMENTS . iv LIST OF FIGURES. x LIST OF TABLES . xii LIST OF APPENDICES . xiii ACRONYMS xiv CHAPTER 1: ORIENTATION TO THE STUDY . 1 1.
Understanding and Evaluation of Software Process Deviations

Software process improvement is often mentioned in today? s software marketplace. To be able to do process improvement, the organisation must have a process to improve from. These processes are commonly deviated from, and the PDU/PAY organisation at Ericsson AB has experienced that this happens too often within their organisation. The aim of this master thesis was to investigate why such deviations occur and how they could be prevented at PDU/PAY. A survey including a qualitative and a quantitative part was conducted at PDU/PAY to investigate this issue. The result was that processes were often deviated from due to lack of: management commitment, user involvement, synchronisation between processes, change management, anchoring of processes, and communication of processes. In addition to the conducted studies, an improvement proposal is given to the PDU/PAY organisation. This includes one organisational part and one part that is directly related to the actual work with processes. The proposal is intended to give PDU/PAY an essence of how to improve their work with their organisational processes.
BER Expression of QAM for Symbol-Level Jamming

In wireless communication systems, quadrature amplitude modulation (QAM) schemes are widely used for high-speed data transmission, and recently, symbol-level jamming (SLJ) is being studied as an effective jamming technique. However, bit error rate (BER) expressions of QAM for SLJ have not been presented in previous studies. In this paper, we derive the exact BER expressions of QAM considering phase coherent and noncoherent scenarios under SLJ. Using the derived expressions, we investigate the SLJ order that maximizes BER of QAM for jamming-to-signal ratio (JSR). Further, we present BER of QAM with tone jamming and show that tone jamming is a special case of noncoherent SLJ. In addition, we use a probability density function of the SLJ amplitude to show that the high order noncoherent SLJ is similar to noise jamming. To increase BER in a low JSR region, we present a BER expression of QAM when SLJ exists in a pulse form. Using the derived expression, we investigate the order and pulse duration ratio to maximize BER for JSR. The derived expressions are verified using computer simulations.
Planar rectennas for 2.45 GHz wireless power transfer

Three planar rectennas (rectifying antennas) on different PCB materials have been designed. Patch antennas were designed with a MoM (method of moments)-based simulator while in RF-to-DC conversion circuits microstrip and discrete rectifier diode models were utilized in circuit simulations. The goal was to achieve maximum antenna and conversion efficiency at the desired reception power level. 80% antenna efficiency and 70% conversion efficiency was achieved in simulations. The terms for achieving a sufficient reception power level were considered and compared to the performance of the designed antennas. The accuracy requirements for the realization of these rectenna structures were also defined with the aid of both simulation and measurement results.
Comparison between experimental and numerical results of the nonlinear vertical ship motions and loads on a containership in regular waves

The paper presents a comparison between experimental data and numerical results of the nonlinear wave induced heave and pitch motions and structural vertical shear forces and bending moments on a containership. The experimental data was obtained from tests with a model of a containership advancing in head regular waves with different steepness, ranging from small to large amplitude waves. Strong nonlinear effects were detected on the experimental data, identified by: the variation of the transfer functions with the wave amplitude, the existence of higher harmonics and the asymmetry of the response records with respect to the positive and negative peaks. The experimental data is compared with numerical results from a nonlinear time domain strip method. The method assumes that the radiation and diffraction hydrodynamic forces are linear and the nonlinear contributions arise from the hydrostatics and Froude-Krilov forces and the effects of green water on deck. The effects of vertical viscous forces due to flow separation are also investigated. The associated forces are represented by a semi-empirical formulation and depend of cross flow drag and lilt coefficients. Nonlinear vertical motions and loads on ships advancing in waves have been investigated before, both experimentally and numerically however, the present paper focuses on several new aspects of the nonlinear vertical structural loads in regular waves. The new aspects include the identification and quantification of third harmonic amplitudes, the influence of the regular wave amplitude on the amplitudes of the first three harmonics and on the sagging and hogging peaks, and the influence of the steady structural loads, that exist also with the ship advancing in calm water, on the asymmetry of the vertical loads in waves. Finally, the influence of viscous forces associated with the large amplitude motions on the wave induced motions and structural loads are also investigated.
Detection and localization of blue and fin whales from large-aperture autonomous hydrophone arrays: A case study from the St. Lawrence estuary

The feasibility of using passive acoustic methods (PAM) to monitor time-space distribution of fin and blue whales in the Saguenay-St. Lawrence Marine Park was explored using large-aperture sparse hydrophone arrays. The arrays were deployed during summers 2003 to 2005 at the head of the 300-m deep Laurentian Channel. They were composed of 5 AURAL autonomous hydrophones moored at mid-water depths, near the summer sound channel. A small coastal array complemented the deployment in 2003. The apertures were from 20 to 40 km and the configurations were changed from year to year. The most frequent calls recorded were blue and fin whale signature infrasounds. Noise from transiting ships on the busy St. Lawrence Seaway often masked the calls on the nearest hydrophones. Sometimes this resulted in an insufficient number of receivers for localizing the whales using time difference of arrival (TDoA) methods. The technical characteristics of the arrays and data processing are presented, with an example of call detection and localization. Despite the difficulties inherent to this environment, PAM can be effectively implemented there, eventually for real-time operations.
DESIGNING A KNOWLEDGE MANAGEMENT ARCHITECTURE TO SUPPORT SELF-ORGANIZATION IN A HOTEL CHAIN

Models are incredibly insidious; they slide undetected into discussions and then dominate the way people think. Since Information Systems (ISs) and particularly Knowledge Management Systems (KMSs) are socio-technical systems, they unconsciously embrace the characteristics of the dominant models of management thinking. Thus, their limitations can often be attributed to the deficiencies of the organizational models they aim to support. Through the case study of a hotel chain, this research suggests that contemporary KMSs in the hospitality sector are still grounded in the assumptions of the mechanistic organizational model which conceives an organization as a rigid hierarchical entity governed from the top. Despite the recent technological advances in terms of supporting dialogue and participation between members, organizational knowledge is still transferred vertically; from the top to the bottom or from the bottom to the top. A number of limitations still exist in terms of supporting effectively the transfer of knowledge horizontally between the geographically distributed units of an organization. Inspired from the key concepts of the more recent complex systems model, referred frequently as complexity theories, a Knowledge Management Architecture (KMA) is proposed aiming to re-conceptualize the existing KMSs towards conceiving an organization as a set self-organizing communities of practice (CoP). In every such CoP, order is created from the dynamic exchange of knowledge between the structurally similar community members. Thus, the focus of the KMA is placed on capturing systematically for reuse the architectural knowledge created upon every initiative for change and share such knowledge with the rest of the members of the CoP. A KMS was also developed to support the dynamic dimensions that the KMA proposes. The KMS was then applied in the case of the hotel chain, where it brought significant benefits which constitute evidence of an improved self-organizing ability. The previously isolated hotel units residing in distant regions could now trace but also reapply easily changes undertaken by the other community members. Top-management? s intervention to promote change was reduced, while the pace of change increased. Moreover, the organizational cohesion, the integration of new members as well as the level of management alertness was enhanced. The case of the hotel chain is indicative. It is believed that the KMA proposed can be applicable to geographically distributed organizations operating in different sectors too. At the same time, this research contributes to the recent discourse between the fields of IS and complexity by demonstrating how fundamental concepts from complexity such as self-organization, emergence and edge-of-chaos can be embraced by contemporary KMSs.
Modelling the Innovation Process: A Multi-Case Comparison

This thesis studies the management of the internal innovation process. Innovation is considered critical to success in business today, yet companies do not always unlock the value contained within innovations. The purpose of this study is to develop an understanding of the practical systems currently employed by companies and to gain insight into the activities leading to successful innovation outcomes. The expectation is that a more structured approach to innovation management would deliver greater effectiveness to realizing innovation value. A multiple case study strategy was utilized comparing and analyzing three companies’ existing innovation-to-outcome systems, with Rogers’ Innovation Decision Process model adopted to ground the study. The findings advance knowledge of innovation system events and related features with results revealing two main innovation systems as consistent across the companies studied. There is a basic system for realizing incremental innovation as a consequence of an organization's ethos for continuous improvement. The second is a more complex system for radical innovations. This second system supplements the basic version by providing safeguards against the risk inherent nature of this type of innovation.The research indicates that a successful innovation-to-outcome system does not operate in isolation. Rather it appears that there is a link between companies’ operating environments and the effective realization of innovation value. Further, the results suggest that for such companies successful unlocking of innovation value can lead to growth. This in turn requires formalizing innovation systems to sustain innovation activities. This study offers an emerging input/output model drawing on insights and referencing patterns associated with best practice. The model provides a basis for companies to formalize the management of their innovation activities.
Mixed-Order Ambisonics Recording and Playback for Improving Horizontal Directionality

Planar (2D) and periphonic (3D) higher-order Ambisonics (HOA) systems are widely used to reproduce spatial properties of acoustic scenarios. Mixed-order Ambisonics (MOA) systems combine the beneﬁt of higher order 2D systems, i.e. a high spatial resolution over a larger usable frequency bandwidth, with a lower order 3D system to reproduce elevated sound sources. In order to record MOA signals, the location of the microphones on a hard sphere were optimized to provide a robust MOA encoding. A detailed analysis of the encoding and decoding process showed that MOA can improve both the spatial resolution in the horizontal plane and the usable frequency bandwidth for playback as well as recording. Hence the described MOA scheme provides a promising method for improving the performance of current 3D sound reproduction systems.
Modelling and simulation of power MOSFETs and power diodes

A model of a power MOSFET has been improved and implemented in SPICE. A method for parameter extraction from electrical measurements has been developed. The model is simple and accurate, and the simulation results show good agreement with the measurements. The switching behavior of the MOSFETs has been simulated and analyzed, and the parasitic oscillation in parallel circuits has been investigated. A way to avoid this undesirable effect is proposed and proved. The development of an electrical analysis model for the p-i-n power diode is reported. The internal processes during switching have been investigated using physical device simulation, and a one-dimensional solution has been obtained. <<ETX>>