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Cascode Injection-Voltaic Transistor Fiber/Polymer Composite, Ziyoda Kh. Aripova, Shunkorjon T. Toshmatov 2019 Tashkent University of Information Technologies named after Muhammad al-Khwarizmi, Tashkent, Uzbekistan

Cascode Injection-Voltaic Transistor Fiber/Polymer Composite, Ziyoda Kh. Aripova, Shunkorjon T. Toshmatov

Euroasian Journal of Semiconductors Science and Engineering

This paper developed injection-voltaic transistor presents. The results research of the V-I characteristic of cascode injection-voltaic transistor. It is shown that the proposed transistor operates stably at values of the reverse voltage collector-base 2-3 times higher than single transistors.


Features Of Diffusion In Epitaxial Cosi2 Films Grown On The Surface Of Fluorete Of Deep Levels In Silicon Doped By Tungsten, Bakhrom E. Egamberdiev, Shokhruh A. Sayfulloev 2019 Tashkent State Technical University, Tashkent, Uzbekistan.

Features Of Diffusion In Epitaxial Cosi2 Films Grown On The Surface Of Fluorete Of Deep Levels In Silicon Doped By Tungsten, Bakhrom E. Egamberdiev, Shokhruh A. Sayfulloev

Euroasian Journal of Semiconductors Science and Engineering

The paper presents the results of the analysis of the epitaxial film CoSi2/Si/CaF2(100) grown by molecular beam epitaxy. It is proved that under certain conditions of heat treatment, so-called epitaxial silicides are formed on the crystal structure, which can play the role of conductive layers or metal coatings. The data obtained allow us to draw conclusions about the morphology of the film and the nature of diffusion in the CoSi2 layer.


Mesoscale Ceramic Cylindrical Ion Trap Mass Analyzers For In Situ Sample Analysis, Patrick Roman 2019 Florida International University

Mesoscale Ceramic Cylindrical Ion Trap Mass Analyzers For In Situ Sample Analysis, Patrick Roman

FIU Electronic Theses and Dissertations

As wireless network devices and IOT connectivity develop, the application and demand for small, low power, in situ sensors and instruments will expand. There are continuous efforts in the miniaturization of sensors and scientific instrument systems for conventional to field deployable and rugged hand held units for personal use to extreme harsh environment applications. This work investigates mesoscale cylindrical ion trap (CIT) mass analyzer design and the benefits of CITs realized via additive manufactured metalized ceramic material systems for improved ion signal, low power performance, and extended dynamic range. Rugged monolithic miniature mass spectrometer ceramic CIT chips have been produced ...


Energy Efficiency Of Computation In All-Spin Logic: Projections And Fundamental Limits, Zongya Chen 2019 University of Massachusetts Amherst

Energy Efficiency Of Computation In All-Spin Logic: Projections And Fundamental Limits, Zongya Chen

Masters Theses

Built with nanomagnets, a spintronic device called the all-spin logic (ASL) device carries information with only spin currents, resulting in a low power supply--10 mV. This voltage is 100 times smaller than the conventional CMOS devices (usually 0.8~1V). The potential for improved energy efficiency made possible by the low operating voltage of ASL makes it one of the most promising devices among its post-CMOS competitors.

The basic working principles of ASL device are introduced in this thesis and two complementary approaches to studying energy efficiency of computation are applied to a common set of ASL circuits: (1) a ...


Reactive Ion Etching Selectivity Of Si/Sio2: Comparing Of Two fluorocarbon Gases Chf3 And Cf4, Meiyue Zhang, Pat Watson 2019 Singh Center for Nanotechnology

Reactive Ion Etching Selectivity Of Si/Sio2: Comparing Of Two fluorocarbon Gases Chf3 And Cf4, Meiyue Zhang, Pat Watson

Protocols and Reports

Two reactive ion etching (RIE) processes were studied to show the relative etch selectivity between SiO2 and Si using two fluorocarbon gases, CF4 and CHF3. Results show that CHF3 gives better selectivity (16:1) over CF4 (1.2 :1). On the other hand, the etch rate of SiO2 of CF4 is approximately 52.8 nm/min, faster than CHF3 (32.4 nm/min).


Wearable Bluetooth Sensors For Capturing Relational Variables And Temporal Variability In Relationships: A Construct Validation Study, James G. Matusik, Ralph Heidl, John R. Hollenbeck, Andrew Yu, Hun W. Lee, Michael D. Howe 2019 Michigan State University

Wearable Bluetooth Sensors For Capturing Relational Variables And Temporal Variability In Relationships: A Construct Validation Study, James G. Matusik, Ralph Heidl, John R. Hollenbeck, Andrew Yu, Hun W. Lee, Michael D. Howe

Management Publications

The advent of wearable sensor technologies has the potential to transform organizational research by offering the unprecedented opportunity to collect continuous, objective, highly granular data over extended time periods. Recent evidence has demonstrated the potential utility of Bluetooth-enabled sensors, specifically, in identifying emergent networks via colocation signals in highly controlled contexts with known distances and groups. Although there is proof of concept that wearable Bluetooth sensors may be able to contribute to organizational research in highly controlled contexts, to date there has been no explicit psychometric construct validation effort dedicated to these sensors in field settings. Thus, the two studies ...


Experimental Study And Modeling Of The Gm-I Dependence Of Long-Channel Mosfets, Michael Fong Cheng 2019 California Polytechnic State University, San Luis Obispo

Experimental Study And Modeling Of The Gm-I Dependence Of Long-Channel Mosfets, Michael Fong Cheng

Master's Theses and Project Reports

This thesis describes an experimental study and modeling of the current-transconductance dependence of the ALD1106, ALD1107, and CD4007 arrays. The study tests the hypothesis that the I-gm dependence of these 7.8 µm to 10 µm MOSFETs conforms to the Advanced Compact Model (ACM). Results from performed measurements, however, do not support this expectation. Despite the relatively large length, both ALD1106 and ALD1107 show sufficiently pronounced ‘short-channel’ effects to render the ACM inadequate. As a byproduct of this effort, we confirmed the modified ACM equation. With an m factor of approximately 0.6, it captures the I-gm dependence with sub-28 ...


Electromagnon Excitation In Cupric Oxide Measured By Fabry-Pérot Enhanced Terahertz Mueller Matrix Ellipsometry, Sean Knight, Dharmalingam Prabhakaran, Christian Binek, Mathias Schubert 2019 University of Nebraska - Lincoln

Electromagnon Excitation In Cupric Oxide Measured By Fabry-Pérot Enhanced Terahertz Mueller Matrix Ellipsometry, Sean Knight, Dharmalingam Prabhakaran, Christian Binek, Mathias Schubert

Christian Binek Publications

Here we present the use of Fabry-Pérot enhanced terahertz (THz) Mueller matrix ellipsometry to measure an electromagnon excitation in monoclinic cupric oxide (CuO). As a magnetically induced ferroelectric multiferroic, CuO exhibits coupling between electric and magnetic order. This gives rise to special quasiparticle excitations at THz frequencies called electromagnons. In order to measure the electromagnons in CuO, we exploit single-crystal CuO as a THz Fabry-Pérot cavity to resonantly enhance the excitation’s signature. This enhancement technique enables the complex index of refraction to be extracted. We observe a peak in the absorption coefficient near 0.705 THz and 215 K ...


Limitations Of Zt As A Figure Of Merit For Nanostructured Thermoelectric Materials, Xufeng Wang, Mark Lundstrom 2019 Purdue University

Limitations Of Zt As A Figure Of Merit For Nanostructured Thermoelectric Materials, Xufeng Wang, Mark Lundstrom

Department of Electrical and Computer Engineering Faculty Publications

Thermoelectric properties of nanocomposites are numerically studied as a function of average grain size or nanoparticle density by simulating the measurements as they would be done experimentally. In accordance with previous theoretical and experimental results, we find that the Seebeck coefficient, power factor and figure of merit, zT, can be increased by nanostructuring when energy barriers exist around the grain boundaries or embedded nanoparticles. When we simulate the performance of a thermoelectric cooler with the same material, however, we find that the maximum temperature difference is much less than expected from the given zT. This occurs because the measurements are ...


Resonant Acoustic Wave Assisted Spin-Transfer-Torque Switching Of Nanomagnets, Austin R. Roe 2019 Virginia Commonwealth University

Resonant Acoustic Wave Assisted Spin-Transfer-Torque Switching Of Nanomagnets, Austin R. Roe

Theses and Dissertations

We studied the possibility of achieving an order of magnitude reduction in the energy dissipation needed to write bits in perpendicular magnetic tunnel junctions (p-MTJs) by simulating the magnetization dynamics under a combination of resonant surface acoustic waves (r-SAW) and spin-transfer-torque (STT). The magnetization dynamics were simulated using the Landau-Lifshitz-Gilbert equation under macrospin assumption with the inclusion of thermal noise. We studied such r-SAW assisted STT switching of nanomagnets for both in-plane elliptical and circular perpendicular magnetic anisotropy (PMA) nanomagnets and show that while thermal noise affects switching probability in in-plane nanomagnets, the PMA nanomagnets are relatively robust to the ...


Fabrication And Characterization Of Nanofiber Nylon-6-Mwcnt As An Electrochemical Sensor For Sodium Ions Concentration Detection In Sweat, Kelsey Mills 2019 The University of Akron

Fabrication And Characterization Of Nanofiber Nylon-6-Mwcnt As An Electrochemical Sensor For Sodium Ions Concentration Detection In Sweat, Kelsey Mills

Williams Honors College, Honors Research Projects

Fabrication and characterization nylon-6-MWCNT nanofiber as an electrochemical sensor to detect sodium ion concentrations specifically in sweat. Using contact angle to determine surface morphology and chronoamperometry testing to identify ideal sensor conditions, tests optimized parameters like weight percent of nylon or other polymers, carbon nanotube (CNT) isomer, and solution concentration to determine reproducibility of functional sensors. Utilizing the electric qualities of carbon nanotubes partnered with the sodium ion selectivity of calixarene treatment and polymers unique properties like flexibility and scalability create open an arena for optimizing sodium ion sensors for further development for functional prototypes. Morphology tests showed that the ...


Straintronic Nanomagnetic Devices For Non-Boolean Computing, Md Ahsanul Abeed 2019 Virginia Commonwealth University

Straintronic Nanomagnetic Devices For Non-Boolean Computing, Md Ahsanul Abeed

Theses and Dissertations

Nanomagnetic devices have been projected as an alternative to transistor-based switching devices due to their non-volatility and potentially superior energy-efficiency. The energy efficiency is enhanced by the use of straintronics which involves the application of a voltage to a piezoelectric layer to generate a strain which is ultimately transferred to an elastically coupled magnetostrictive nanomaget, causing magnetization rotation. The low energy dissipation and non-volatility characteristics make straintronic nanomagnets very attractive for both Boolean and non-Boolean computing applications. There was relatively little research on straintronic switching in devices built with real nanomagnets that invariably have defects and imperfections, or their adaptation ...


Desarrollo De Un Juguete Educativo Armable, Que Permita El Aprendizaje Correcto Del Cepillado Dental, Jhon Alejandro Celis Méndez, Luis Arturo Penagos Gómez 2019 Universidad de La Salle, Bogotá

Desarrollo De Un Juguete Educativo Armable, Que Permita El Aprendizaje Correcto Del Cepillado Dental, Jhon Alejandro Celis Méndez, Luis Arturo Penagos Gómez

Ingeniería en Automatización

El presente documento se constituye como la memoria técnica y a su vez la guía para el entendimiento del prototipo denominado por los autores como “ODONTODRILO”, el cual surge a partir del proyecto titulado “Desarrollo de un juguete educativo armable, que permita el aprendizaje correcto del cepillado dental”. En este sentido, se tiene que el proyecto consistió en diseñar, fabricar e implementar un juguete educativo armable, que permita el aprendizaje correcto del cepillado dental en niños de temprana edad. A partir de la necesidad citada, se definió un marco metodológico que consiste en tres etapas, la primera de ellas se ...


Desarrollo De Una Estrategia De Control Predictivo Aplicado A Un Péndulo Invertido, Que Permita La Estabilización De Imágenes En Robots Para Exploración Agrícola, David Mateo Rojas Vallejo 2019 Universidad de La Salle, Bogotá

Desarrollo De Una Estrategia De Control Predictivo Aplicado A Un Péndulo Invertido, Que Permita La Estabilización De Imágenes En Robots Para Exploración Agrícola, David Mateo Rojas Vallejo

Ingeniería en Automatización

La robótica es un campo de estudio tan amplio, que se puede extender prácticamente a cualquiera de las labores humanas; una de estas actividades es la agricultura, aunque para que esto se logre, primero se deben considerar factores mas específicos de un sistema robótico como: visión artificial, estructuras robóticas, control de sistemas, entre otros. En este proyecto se desarrolla una estrategia de control para una plataforma de péndulo invertido, que emula el sistema mecánico en donde se posicionaría la cámara de un robot agrícola. El sistema consiste en un péndulo invertido rotativo, y la estrategia de control que se implementó ...


Diseño E Implementación De Un Sistema Automático De Fertirrigación Para Un Cultivo De Gulupa, Lisbey Catherine Gómez Puentes, Sebastián Ilich Jiménez Vivas 2019 Universidad de La Salle, Bogotá

Diseño E Implementación De Un Sistema Automático De Fertirrigación Para Un Cultivo De Gulupa, Lisbey Catherine Gómez Puentes, Sebastián Ilich Jiménez Vivas

Ingeniería en Automatización

En Colombia la producción frutícola se ha tecnificado notablemente en los últimos años debido a la creciente demanda nacional e internacional de frutas tropicales; la gulupa fue la segunda fruta exótica con más exportación en el año 2017 (La vanguardia, 2018). Actualmente en el municipio de La Belleza Santander los sistemas de riego y fertilización para el cultivo de gulupa son trabajos manuales, ocasionando anormalidades en los frutos ya que por este motivo el fruto puede quedar rugoso, con pulpa seca, insípida y poco aromática; además, se puede presentar desorden fisiológico en la planta (crecimiento y vigor). Al ser este ...


Medidor De Corriente Eléctrica No Intrusivo En Tiempo Real Para Redes De Baja Tensión, Alejandro Gómez Martínez 2019 Universidad de La Salle, Bogotá

Medidor De Corriente Eléctrica No Intrusivo En Tiempo Real Para Redes De Baja Tensión, Alejandro Gómez Martínez

Ingeniería Eléctrica

En el presente trabajo se diseñó e implementó un medidor de corriente para redes de baja tensión con un rango de medición de 0 a 7 A rms. También, se implementó un medidor de tensión en el dominio del tiempo. Este medidor de corriente es no intrusivo, por lo que se hace fácil de instalar y mitiga el riesgo eléctrico del personal que instala esta clase de medidores. Además, es de bajo costo, lo cual beneficia a los usuarios que tengan la necesidad de adquirir este tipo de medidor. El medidor es capaz de realizar mediciones de potencia, y podría ...


Herramienta Computacional Para La Organización Y Presentación De Datos De Descargas Atmosféricas En Circuitos Eléctricos Aéreos De Media Tensión, Diego Alejandro González Lizcano 2019 Universidad de La Salle, Bogotá

Herramienta Computacional Para La Organización Y Presentación De Datos De Descargas Atmosféricas En Circuitos Eléctricos Aéreos De Media Tensión, Diego Alejandro González Lizcano

Ingeniería Eléctrica

El territorio colombiano presenta una de las más altas actividades atmosféricas del planeta. Esto según estudios de niveles isoceráunicos realizados en todo el mundo (Torres y Ávila, 2000). Entregando desafíos de confiabilidad para sistemas de transmisión y distribución eléctrica, puesto que, para estos sistemas el factor de mayor incidencia en el incremento de la discontinuidad del suministro son las descargas atmosféricas. Además, las incidencias sobre las líneas aéreas o en la cercanía de estas, controlan las llamas en los aisladores, deteriorando la confiabilidad del sistema si no se realizan maniobras de mantenimiento preventivo. Ceñido a nuevos avances tecnológicos en la ...


Energy Efficient Spintronic Device For Neuromorphic Computation, Md Ali Azam 2019 Virginia Commonwealth University

Energy Efficient Spintronic Device For Neuromorphic Computation, Md Ali Azam

Theses and Dissertations

Future computing will require significant development in new computing device paradigms. This is motivated by CMOS devices reaching their technological limits, the need for non-Von Neumann architectures as well as the energy constraints of wearable technologies and embedded processors. The first device proposal, an energy-efficient voltage-controlled domain wall device for implementing an artificial neuron and synapse is analyzed using micromagnetic modeling. By controlling the domain wall motion utilizing spin transfer or spin orbit torques in association with voltage generated strain control of perpendicular magnetic anisotropy in the presence of Dzyaloshinskii-Moriya interaction (DMI), different positions of the domain wall are realized ...


Optical And Electrical Analysis Of Zno/Znte Micropillar Solar Cells, Sadia Binte Sohid 2019 Bucknell University

Optical And Electrical Analysis Of Zno/Znte Micropillar Solar Cells, Sadia Binte Sohid

Master’s Theses

The prime focus of the energy-research community in recent times has been replacing fossil fuels with renewable energy. Therefore, photovoltaic research areas are rapidly expanding in this era. The purpose of this work is to compare three different structural ZnO/ZnTe solar cell types (planar, axial micropillar and radial micropillar). The best optical and electrical performance has been obtained by the radial junction (core-shell) ZnO/ZnTe micropillar solar cell due to its pillar structure and radial junction. The unique advantage of the radial junction micropillar is that the angle of the incident light and the carrier collection is orthogonal. Therefore ...


S.A.V.E. M.E., Taylor Davis, Kelly Nicole O'Neill, Adrianna M. Dunlap, Parsa Esshaghi Bayat 2019 The University of Akron

S.A.V.E. M.E., Taylor Davis, Kelly Nicole O'Neill, Adrianna M. Dunlap, Parsa Esshaghi Bayat

Williams Honors College, Honors Research Projects

S.A.V.E. M.E. stands for Submerged Automated Vehicular Elevation Minor Extraction or alternatively a Home Swimming Pool Rescue Device. The objective of this project is to design and prototype a system that will make unattended swimming pools through detecting a victim’s presence, deploying a means to save the victim, and alerting others nearby of the situation. This system encompasses sensors and devices within the pool and an alarm system outside of the pool. Upon detection of a sufficiently sized object entering the pool when the system is armed, a device will maneuver to the victim and ...


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