Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 103 for “"memory effect."”.
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The Adaptive Memory Effect: Exploring Need for Cognition and Survival Processing
Adaptive memory demonstrates that memory is enhanced when information is processed because of its relevance to survival (Nairne, Thompson, & Pandeirada, 2007). In the present experiments we examined whether there was a difference in individuals Need for Cognition (NFC) in regards to adaptive …
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Domain structure, phase transformation, mechanical behavior and shape memory effect in a rare-earth orthoniobate lanthanum niobate
… rubberlike behavior and (4) exploring the shape memory effect in polycrystal ceramic LaNbO$\sb4$."
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An experimental investigation of the behavior of Nitinol
Shape memory alloys (SMA) have the unique ability to recover large strains and generate large recovery stresses via a repeatable martensitic transformation. Stress-strain and shape memory effect characteristics are needed in order to develop SMA force actuator design methods. Moreover, constitutive …
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Eye Movement-Based Memory Assessment: The Use of Eye Movement Monitoring as an Indirect Measure of Memory
"Here, I introduce a new indirect measure of memory based on eye movement monitoring. Effects observed in eye movement data collected while participants were viewing images of faces showed that viewers process repeated items differently than novel items. Experiment 1 shows that this ""eye …
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Hysteresis and memory effects in nanocrystal embedded MOS capacitors
Nanocrystal Memory is a promising new memory type which utilizes silicon nanocrystals and quantum mechanical direct tunneling current for charge storage. This thesis presents the work done to characterize the memory effect in nanocrystal embedded metal-oxide-semiconductor (NC-MOS) capacitors, the …
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Modeling of materials with internal variables using a thermomechanical approach
… constitutive model for the two-way shape memory effect and a one-dimensional constitutive model for piezoceramics have been developed, respectively. In modeling the two-way shape memory effect, a residual stress σ<sub>re</sub> is introduced as a controlling parameter for the two-way shape …
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The effect of annealing on the microstructure of Cu-Al-Ni-Mn shape memory alloy microwires
Shape memory alloys exhibit superelasticity and the shape memory effect by undergoing a diffusionless phase transformation between the austenite and martensite phases. Nickel-titanium alloys are currently the most common material used. However, due to their expensive cost, alternatives such as …
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Order phenomena in polymer crystallization
… (NMR) spectroscopy. In particular the so-called memory effect in syndiotactic polypropylene (s-PP) and the influence of entangled polymer chains (entanglements) on the crystal growth rate have been the key points of investigation. Qualitative differences in the degree of order of chain segments …
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Attempts to analyse D/H ratios of sub-micromole quantities of hydrogen : applications in the study of ordinary chondrites
… of this system was poor due to the presence of a memory effect. Experiments, using the conventional inlet, showed that this memory effect was due to sample water remaining on the surfaces of the inlet system. The presence of the memory effect could not be eliminated, but a correction procedure was …
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Design and implementation of adaptive baseband predistorter for OFDM nonlinear transmitter. Simulation and measurement of OFDM transmitter in presence of RF high power amplifier nonlinear distortion and the development of adaptive digital predistorters based on Hammerstein approach.
… distortion of a High Power Amplifier (PA). The effectiveness of the proposed baseband predistorter (PD) on the performance of a WLAN OFDM transmitter utilizing a nonlinear PA with memory effect is observed and discussed. For this purpose, a 10W Class-A/B power amplifier with a gain of 22 dB, …
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Effect of the Mn Additive on Cu-Zn-Al Shape Memory Alloy
… in the research field of copper-based shape memory alloys including the Cu-Al-Ni, Cu-Zn-Al, Cu-Al-Mn, Cu-Al-Be, and other copper-based shape memory alloy. From the standpoint of mechanisms (phase transformation, thermodynamics) and properties (shape memory effect, mechanical properties), this …
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Understanding the Role of the Ventrolateral Prefrontal Cortex in Emotional Memory using Transcranial Direct Current Stimulation and Transcranial Magnetic Stimulation
… stimuli can have both beneficial and detrimental effects on memory, such that emotional stimuli can be distracting from current neutral working memory goals, while also leading to enhanced episodic memory for the distracting emotional stimuli. Recent evidence suggests that the ventrolateral …
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Determination of High Mass, Low Intensity and Transient Mass Spectra by Computer
… molecular weight 3300, provides a minimum source memory effect.
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Prestressing Concrete with Shape Memory Alloy Fibers
… straight members. During the last decade, shape memory alloys (SMA) have become more prevalent in engineering and civil engineering applications. The shape memory effect refers to the contraction of the SMA when it is heated to its austenite phase. When a prestrain is induced in the SMA, it can …
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Ligand Dependent Regioselectivity in Palladium Mediated Allylic Alkylation
… wih different donor atoms. The regioselective memory effect (regioretention) was studied in cationic systems utilizing a non-chiral P,N-ligand. The experimental findings showed only a small memory effect arising from the preferred attack of the nucleophile on the allylic moiety trans to …
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A Dynamic and Thermodynamic Approach to Complexity.
… problem using a dynamic model, the so-called memory beyond memory, based on the Lévy walker model. It is proved that the memory beyond memory effect is more obvious in the healthy heart beating sequence. The concepts of fractal, multifractal, wavelet transformation and wavelet transform …
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An Investigation of the Structural and Magnetic Transitions in Ni-Fe-Ga Ferromagnetic Shape Memory Alloys
… transformations in Ni-Fe-Ga ferromagnetic shape memory alloys are very sensitive to both alloy chemistry and thermal history. A series of Ni-Fe-Ga alloys near the prototype Heusler composition (X2YZ) were fabricated and homogenized at 1423 °K, and a Ni₅₃Fe₁₉Ga₂₈ alloy was subsequently annealed at …
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Palladium-katalysierte kinetische Racematspaltung allylischer Carbonate mit S-Nukleophilen und enantioselektive Umlagerung allylischer O-Sulfinate : asymmetrische Synthese von allylischern Sulfiden und Sulfonen
… of the chirality of the substrate, that is, no "memory effect" is operating. However, a "memory effect" seems to operate in the case of the reaction of the cyclopentenyl esters with 2-pyrimidinethiol. The second part described the asymmetric synthesis of cyclic and acyclic allylic S-aryl and …
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A Novel Shape Memory Behavior of Single-crystalline Metal Nanowires
… method (EAM) potentials are used. A novel shape memory effect and pseudoelastic behavior of single-crystalline FCC metal (Cu, Ni, and Au) nanowires are discovered. Specifically, upon tensile loading and unloading, these wires can recover elongations of up to 50%, well beyond the recoverable …
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Cu-based shape memory microwires : towards complex structures
Shape memory alloys are a distinctive type of material that exhibits the fascinating properties of the shape memory effect and superelasticity. Shape memory properties are characterized by the diffusionless phase transformation between austenite and martensite that can be thermally or stress …
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