A thirty channel real time audio analyzer and its applications

Ph.D.Eugene T. Patronis, Jr

Organic small molecule field-effect transistors with Cytop(TM) gate dielectric: eliminating gate bias stress effects

We report on organic field-effect transistors with unprecedented resistance against gate bias stress. The single crystal and thin-film transistors employ the organic gate dielectric Cytop(TM). This fluoropolymer is highly water repellent and shows a remarkable electrical breakdown strength. The single crystal transistors are consistently of very high electrical quality: near zero onset, very steep subthreshold swing (average: 1.3 nF V/(dec cm2)) and negligible current hysteresis. Furthermore, extended gate bias stress only leads to marginal changes in the transfer characteristics. It appears that there is no conceptual limitation for the stability of organic semiconductors in contrast to hydrogenated amorphous silicon.Comment: 4 pages, 3 figures, to be published in Appl. Phys. Let

3Dscanner

This project entails designing, prototyping, and testing a 3D scanner. The device that we are building uses LIDAR to take position data of a 3D object, then analyze and encode the sensor data as an STL file that can later be 3D printed out at the same resolution. We aim to build an affordable, high-performance 3D scanner that takes advantage of the falling cost of LIDAR in order to bring 3D scanning capabilities to individuals, the maker community, and even small businesses. We begin this process by choosing a sensor, the YDLIDAR X4, as our primary method of taking position data of the object. We take calibration data with this sensor to ensure that it is suitable to our needs. In doing so, we find that we may need to incorporate certain statistical methods, like dithering, in order to increase the accuracy of the system. We determine an effective layout for scanning all sides of an object, overcoming obstacles like scanning objects with concave surfaces. The physical system is mocked up in Solidworks, enabling us to 3D print, laser cut, and buy all the necessary components of the system. The system is constructed while an interactive user interface is created. We develop an algorithm for turning individual data points from the raw data of the X4 sensor into 3D printable STL files, and interface it with a program that controls the motors to take consistent, comprehensive scans of any object on the platform. In the end, we find two limitations of LIDAR in 3D scanning systems - high-gloss black surfaces and certain steep angles cannot be scanned adequately by LIDAR. However, once our system is constructed, we are able to take 3D scans of common objects, and even 3D print one of our scanned objects. The scan is compared to the original object, and the dimensional accuracy of our scanner is verified

MODIS Technical Report Series. Volume 4: MODIS data access user's guide: Scan cube format

The software described in this document provides I/O functions to be used with Moderate Resolution Spectroradiometer (MODIS) level 1 and 2 data, and could be easily extended to other data sources. This data is in a scan cube data format: a 3-dimensional ragged array containing multiple bands which have resolutions ranging from 250 to 1000 meters. The complexity of the data structure is handled internally by the library. The I/O calls allow the user to access any pixel in any band through 'C' structure syntax. The high MODIS data volume (approaching half a terabyte per day) has been a driving factor in the library design. To avoid recopying data for user access, all I/O is performed through dynamic 'C' pointer manipulation. This manual contains background material on MODIS, several coding examples of library usage, in-depth discussions of each function, reference 'man' type pages, and several appendices with details of the included files used to customize a user's data product for use with the library

VEX robotics

The objective of our project was to design and construct a control system for communication between two autonomous robots, of different size and capabilities, in an environment with numerous obstacles and challenges. These challenges, completed autonomously, involved moving over and under barriers along with the obtainment and transportation of spherical objects. Our project was tied to the VEX Robotics competition environment as we tested our robots by competing at the World Championships. Unfortunately, due to time and budget considerations, we had to scale back our sensor subsystem. This led to a simpler control system than originally intended; however, we were successful at the competition, and built robots that were efficient and economic in design. Our results proved that our robot designs were more agile and maneuverable than our opponents when it came to manipulating environment elements, and that our scaled back autonomous programs were still very effective in disrupting opponent robots\u27 routines and strategies

Predicción de control sobre el tiempo en conducción altamente automatizada en dos tests psicométricos

In this study, we investigated if the driver's ability to take over vehicle control when being engaged in a secondary task (Surrogate Reference Task) can be predicted by a subject's multitasking ability and reaction time. 23 participants performed a multitasking test and a simple response task and then drove for about 38 min highly automated on a highway and encountered five take-over situations. Data analysis revealed significant correlations between the multitasking performance and take-over time as well as gaze distributions for Situations 1 and 2, even when reaction time was controlled. This correlation diminished beginning with Situation 3, but a stable difference between the worst multitaskers and the best multitaskers persisted. Reaction time was not a significant predictor in any situation. The results can be seen as evidence for stable individual differences in dual task situations regarding automated driving, but they also highlight effects associated with the experience of a take-over situation. En este estudio se investigó la capacidad del conductor para tomar el control del vehículo, en una tarea secundaria puede predecirse por la habilidad multitarea del sujeto y la reacción inmediata. Participaron 23 personas ejecutando una prueba de tareas múltiples y una de simple respuesta , conduciendo durante 38 min de forma altamente automatizada, encontrándose cinco situaciones de toma de posesión. Los datos revelaron una correlación significativa entre el rendimiento multitarea y la toma del tiempo, así como la distribución de la situación 1 y 2, aunque el tiempo de reacción se controló. Esta relación disminuye comenzando con la situación 3, persistiendo una diferencia estable en la toma en el tiempo entre los peores y los mejores. El tiempo de reacción no fue un predictor significativo. Los resultados pueden ser vistos como evidencia de las diferencias individuales estables en situaciones de doble tarea respecto a la conducción automática. Document type: Articl

Rock powder as a tool in the production of arugula seedlings in substrates

The interaction between rock powder and substrates in arugula and the amount to be used of this remineralizer are not elucidated. Thus, the objective of the study was to investigate whether substrates associated with rock powder interfere with the phytometric morphology of seedlings and to understand the effect of remineralizer proportions, added to commercial substrate, on the development of arugula seedlings. We performed two experiments. In experiment I, the treatments were three substrates in the absence and presence of rock powder (30% of the container volume), designed in randomized blocks, with three replications. In experiment II, the treatments were six rock powder proportions (0%, 5%, 10%, 15%, 20% and 25% of the container volume), designed in randomized blocks, with three replications. In experiment I, the seedlings produced in the substrate Horta 2® had better phytometric quality. In experiment II, shoot fresh mass and seedling root volume increased until the addition of 15% rock powder to the Horta 2® substrate and decreased with proportions of 20% and 25%. It is concluded that substrates with greater water retention enhance the quality of seedlings. Increasing the proportion of this remineralizer up to 15% of the container volume improves aerial biomass and root volume of arugula seedlings.La interacción entre el polvo de roca y los sustratos en la rúcula y la cantidad a utilizar de este remineralizador no están dilucidadas. Así, el objetivo del estudio fue investigar si los sustratos asociados a polvo de roca interfieren en la morfología fitométrica de las plántulas y comprender el efecto de las proporciones de remineralizante, añadidas en sustrato comercial, sobre el desarrollo de plántulas de rúcula. Realizamos dos experimentos. En el experimento I, los tratamientos fueron tres sustratos en ausencia y presencia de polvo de roca (30% del volumen del contenedor), diseñados en bloques al azar, con tres repeticiones. En el experimento II, los tratamientos fueron seis proporciones de polvo de roca (0%, 5%, 10%, 15%, 20% y 25% del volumen del recipiente), diseñados en bloques al azar, con tres repeticiones. En el experimento I, las plántulas producidas en el sustrato Horta 2® tuvieron mejor calidad fitométrica. En el experimento II, la masa fresca de brotes y el volumen de raíces de las plántulas aumentaron hasta la adición de un 15% de polvo de roca al sustrato Horta 2® y disminuyeron con proporciones de 20% y 25%. Se concluye que los sustratos con mayor retención de agua mejoran la calidad de las plántulas. Aumentar la proporción de este remineralizador hasta un 15% del volumen del contenedor mejora la biomasa aérea y el volumen de raíces de las plántulas de rúcula.The interaction between rock powder and substrates in arugula and the amount to be used of this remineralizer are not elucidated. Thus, the objective of the study was to investigate whether substrates associated with rock powder interfere with the phytometric morphology of seedlings and to understand the effect of remineralizer proportions, added to commercial substrate, on the development of arugula seedlings. We performed two experiments. In experiment I, the treatments were three substrates in the absence and presence of rock powder (30% of the container volume), designed in randomized blocks, with three replications. In experiment II, the treatments were six rock powder proportions (0%, 5%, 10%, 15%, 20% and 25% of the container volume), designed in randomized blocks, with three replications. In experiment I, the seedlings produced in the substrate Horta 2® had better phytometric quality. In experiment II, shoot fresh mass and seedling root volume increased until the addition of 15% rock powder to the Horta 2® substrate and decreased with proportions of 20% and 25%. There is no interactive effect between substrates and rock powder in the production of arugula seedlings in containers. Substrates with greater water retention enhance the quality of arugula seedlings because they improve their phytometric morphology. Proportions of rock powder added to the Horta 2® substrate interfere with the shoot and root system morphology of the seedlings. The increase in the proportion of this remineralizer up to 15% of the container volume, added to the growth medium, improves the aerial biomass and the root volume of arugula seedlings, ‘Donatella’ cultivar

Glucocerebrosidase is imported into mitochondria and preserves complex I integrity and energy metabolism

Mutations in GBA1, the gene encoding the lysosomal enzyme β-glucocerebrosidase (GCase), which cause Gaucher's disease, are the most frequent genetic risk factor for Parkinson's disease (PD). Here, we employ global proteomic and single-cell genomic approaches in stable cell lines as well as induced pluripotent stem cell (iPSC)-derived neurons and midbrain organoids to dissect the mechanisms underlying GCase-related neurodegeneration. We demonstrate that GCase can be imported from the cytosol into the mitochondria via recognition of internal mitochondrial targeting sequence-like signals. In mitochondria, GCase promotes the maintenance of mitochondrial complex I (CI) integrity and function. Furthermore, GCase interacts with the mitochondrial quality control proteins HSP60 and LONP1. Disease-associated mutations impair CI stability and function and enhance the interaction with the mitochondrial quality control machinery. These findings reveal a mitochondrial role of GCase and suggest that defective CI activity and energy metabolism may drive the pathogenesis of GCase-linked neurodegeneration