380 research outputs found
The development of Eddy Current Nondestructive Testing Method for Coating Thickness Measurement on the Steel Sheets
No full textExpression analysis of protein inhibitor of activated STAT (PIAS) genes in IFNβ-treated multiple sclerosis patients [Corrigendum]
No full textTaheri M, Azimi G, Sayad A, et al. J Inflamm Res. 2018;11:457–463.On page 457, Author list and Correspondence, the last author’s name was misspelt. The correct name is Soudeh Ghafouri-Fard.Read the original articl
Quantum dynamics and quantum information processing based on helical multiferroics
No full textMagnetoelektrische Kopplung in helikalen Multiferroika ermöglicht die Kontrolle von Spin-Ordungen durch ein externes elektrisches Feld. Das Hauptziel dieser Arbeit ist die analytische Beschreibung von eindimensionalen frustrierten Spin-1/2-Ketten für die praktische Anwendung in der Quanteninformationsverarbeitung. Es wird gezeigt, dass die Übertragung von Quantenzuständen mit höherer Wiedergabetreue durch entsprechende Abstimmung des externen elektrischen Feldes erreichbar ist. Indem das System einem kurzen elektrischen Feldpuls oder einem plötzlichen Quench des elektrischen Feldes unterworfen wird, wird die Dynamik der Systemchiralität, der von Neumann-Entropie, der paarweisen und Vielteichlenverschränkung analysiert und die Signatur dynamischer Phasenübergänge identifiziert. Eine Quanten-Otto-Wärmekraftmaschine, die als Arbeitssubstanz eine multiferroikische Spinkette hat, wird ebenfalls untersucht und gezeigt, dass aufgrund des Vorhandenseins einer ungleichen Spinchiralität, gekoppelt an eine auftretende elektrische Polarisation in der Arbeitssubstanz, der Wirkungsgrad des Zyklus empfindlich auf externe elektrische Felder reagiert.Magnetoelectric coupling in helical multiferroics renders the possible the steering of spin orders by external electric field. The main objective of the present study is the analytical description of one dimensional frustrated spin-1/2 chain for the practical application in quantum information processing. It is shown that the transfer of quantum states with higher fidelity can be achievable by proper tuning of the external electric field. By subjecting the system to short electric field pulses or a sudden quench of the electric field the dynamics of the system chirality, the von Neumann entropy, the pairwise and many-body entanglement are analyzed and the signature of dynamical phase transitions is identified. A quantum Otto heat engine operating with the working substance of multiferroic spin chain is also investigated and shown that due to the existence of a nonzero spin chirality coupled to an emergent electric polarization in the working substance, the efficiency of the cycle is sensitive to the applied external electric field.vorgelegt von Maryam Azim
UBC2019 - A dataset of subjective image quality of head-mounted displays
No full textThis is the dataset described in the following publication:
"A subjective method for evaluating foveated image quality in HMDs", V. Thirumalai, J. Ribera, J. Xiang, J. Zhang, M. Azimi, J. Kamali, P. Nasiopoulos, Society of Information Display, Display Week - May 2020, San Francisco, CA</p
Isolation of resonance in acoustic backscatter from elastic targets using adaptive estimation schemes
No full textThe problem of underwater target detection and classification from acoustic backscatter is the central focus of this paper. It has been shown that at certain frequencies the acoustic backscatter from elastic targets exhibits certain resonance behavior which closely relates to the physical properties of the target such as dimension, thickness, and composition. Several techniques in both the time domain and frequency domain have been developed to characterize the resonance phenomena in acoustic backscatter from spherical or cylindrical thin shells. The purpose of this paper is to develop an automated approach for identifying the presence of resonance in the acoustic backscatter from an unknown target by isolating the resonance part from the specular contribution. An adaptive transversal filter structure is used to estimate the specular part of the backscatter and consequently the error signal would provide an estimate of the resonance part. An important aspect of this scheme lies in the fact that it does not require an underlying model for the elastic return. The adaptation rule is based upon fast Recursive Least Squares (RLS) learning. The approach taken in this paper is general in the sense that it can be applied to targets of unknown geometry and thickness and, further, does not require any a priori information about the target and/or the environment. Test results on acoustic data are presented which indicate the effectiveness of the proposed approach.The work of M. R. Azimi-Sadjadi was supported by the ASEE-ONR program under the High Area Rate Recon. Project. The work of J. Wilbur and G. J. Dobeck was supported by the ONR
"Du har føtter som kan gå" : her er afghanske flyktningungdommer i Oslo : hvor går vi?
No full textDenne masteroppgaven handler om afghanske flyktningungdommer i Oslo og deres mestring av sosiale relasjoner. Problemstillingen har vært: Hvordan utviser flyktningungdommer fra Afghanistan i Oslo styrke og evne til å mestre sosiale relasjoner til familie, venner og det norske samfunnet, og hvilke hindringer og utfordringer har de møtt?
Hensikten har vært å åpne et vindu som slipper lys inn over et området som ikke så mange i samfunnet vårt tar seg tid til å gjøre seg kjent med, nemlig flyktningers situasjon i Norge. Målet har vært å synliggjøre afghanske flyktningungdommers livssituasjon i Oslo.
Min tilnærming til oppgavens problemstilling har vært praksisrettet, og i denne sammenheng har jeg støttet meg til Bronfenbrenners sosialøkologiske perspektiv (Bronfenbrenner 1979). Jeg har valgt å bruke flere perspektiver i mine analyser og tolkninger av studiematerialet: blant annet humanistisk, historisk og dialektisk. Jeg har tatt utgangspunkt i fem hovedinformanter og deres utsagn og forklaringer om egen opplevelse og erfaring av mestring i livssituasjonen som flyktning, slik de kom fram gjennom samtaler og intervjuet i løpet av 2008
بررسی مقایسه ای تاثیر شیوه سخنرانی و شیوه ایفای نقش از جنبه آگاهی ، نگرش و عملکرد بر تغذیه نوزادان با شیر مادر در منطقه سرجنگل زاهدان
No full text=A comparative study of the effect of speech style and role-playing style in terms of knowledge, attitude and practice on breastfeeding in Sarjangal region of Zahedan.
No full text1938 revisited? Should doors open wider to Syrian refugees?
No full textDoes it seem that every time the world watches refugees flee violence and persecution while politicians claim their country can\u27t possibly take in asylum seekers, we lamentingly claim that the world will never again turn its back on these people.
And yet the next time we seem people streaming out of a war zone with nothing but their families and the shirts on their back we forget the promise we made the last time this happened?
For a world that promised \u27Never Again\u27 after World War II, how much have we actually learned from the handling of refugee crises of the past? Are we making the same mistakes over and over again?
Do you see echoes of the treatment of Jews fleeing the Holocaust in government rhetoric about refugees from Syria and Iraq? And if so, what explains this short-sightedness?
Guests
Dai Le, Founder of DAWN (Diverse Australasian Women’s Network)
Professor Klaus Neumann, Historian at Swinburne University and author of Across the Seas: Australia\u27s Response to Refugees: A History
Akram Azimi, Sociologist at the University of Western Australia and 2013 Young Australian of the Yea
Wave-Induced Currents Within Mangrove Forest
No full textMangroves are tidal trees commonly observed along the sheltered shorelines of most tropical (from equator to 23.5° North and South latitude) and few subtropical (23.5° to 40° North and South latitude) countries. These plants are adapted to loose wet soils, saline habitats and periodic tidal submergence. With more attention paid into the approach of building with nature, natural coastal defence strategies are gaining more importance as an asset in addressing the coastal squeeze that is prevalent not only in urban areas, but also in agriculture and industrial areas that are located along the coastline. Mangroves are receiving more attention due to their coastal protective role against wave and hydrodynamic forcings as well as their ability to adapt to sea level rise. Mangrove vegetation attenuates and damps the hydrodynamics forcings by providing obstacles to the flows and creating drag. To date and to the knowledge of the author, no study has been conducted on interaction of the wave-induced currents with mangrove vegetation. This lack of relevant studies may be due to the fact that mangrove forests and the foreshore in front of the mangroves are usually of very gently sloping bed (varying in order of 1:300 to 1:1500). This means that in order to conduct physical model experiments to study wave-induced current within a mangrove forest, a very large wave basin is required in order to conduct modelling without using a very large scale factor difference between prototype and model. This is to ensure that the relevant processes are representing prototype as closely as possible, as well as to be measureable. Numerical modelling of the interaction of wave-induced current with mangrove vegetation is yet to be conducted due to the lack of measured data for validation, both field as well as experimental measurements. An experiment by Hulsbergen (1973) was selected as validation data for current study. The main objective of the study is to understand the difference of nearshore processes for (stationary) tidal gradient-driven and oblique wave-driven current for both with and without mimic mangrove vegetation. The scope of the study involves desktop analysis of the main validation data and other relevant and similar experiments, assessment of reliability of Delft3D for the study, validation against measured data, and simulation of various hydraulic conditions for condition with mangrove forest. Among questions answered in this study are the extent of wave-induced longshore current damping within mangrove forest, the significance of wave-induced longshore current within mangrove forest, the effects of bed slope and mangrove density on wave-induced current and the extent of model’s reliability for current study. It was shown that the damping of wave-induced longshore current is more than 80% and the contribution of waveinduced current to the total velocity can be more than 70%. Of course, both of the above was specific to the bathymetry, mangrove properties and hydraulic conditions specified within current study. Furthermore, it was shown that bed slope and mangrove density affect wave-induced longshore current within the mangrove forest. It was also found that current model setup has its limitations.Civil Engineering | Hydraulic Engineering | Coastal Engineerin
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