DreamCatcher: Revealing the Language of the Brain with fMRI using GPT Embedding

The human brain possesses remarkable abilities in visual processing, including image recognition and scene summarization. Efforts have been made to understand the cognitive capacities of the visual brain, but a comprehensive understanding of the underlying mechanisms still needs to be discovered. Advancements in brain decoding techniques have led to sophisticated approaches like fMRI-to-Image reconstruction, which has implications for cognitive neuroscience and medical imaging. However, challenges persist in fMRI-to-image reconstruction, such as incorporating global context and contextual information. In this article, we propose fMRI captioning, where captions are generated based on fMRI data to gain insight into the neural correlates of visual perception. This research presents DreamCatcher, a novel framework for fMRI captioning. DreamCatcher consists of the Representation Space Encoder (RSE) and the RevEmbedding Decoder, which transform fMRI vectors into a latent space and generate captions, respectively. We evaluated the framework through visualization, dataset training, and testing on subjects, demonstrating strong performance. fMRI-based captioning has diverse applications, including understanding neural mechanisms, Human-Computer Interaction, and enhancing learning and training processes.Comment: 10 Pages, 8 figures, 1 tabl

Compact bifluid hybrid stars: Hadronic Matter mixed with self-interacting fermionic Asymmetric Dark Matter

The masses and radii of non-rotating and rotating configurations of pure hadronic stars mixed with self-interacting fermionic Asymmetric Dark Matter are calculated within the two-fluid formalism of stellar structure equations in general relativity. The Equation of State (EoS) of nuclear matter is obtained from the density dependent M3Y effective nucleon-nucleon interaction. We consider dark matter particle mass of 1 GeV. The EoS of self-interacting dark matter is taken from two-body repulsive interactions of the scale of strong interactions. We explore the conditions of equal and different rotational frequencies of nuclear matter and dark matter and find that the maximum mass of differentially rotating stars with self-interacting dark matter to be $\sim 1.94 M_\odot$ with radius $\sim 10.4$ kms.Comment: 9 pages including 1 table & 8 figure

Sistema domótico para adultos mayores con dependencia funcional

Trabajo de investigaciónEn este trabajo de grado, se implementa un sistema domótico que se controla por medio de un control manual inalámbrico que establece la comunicación por medio de radio frecuencia de tipo punto a punto, también incorpora un sistema de reconocimiento de voz, donde ejecuta comandos básicos para activar y desactivar un interruptor, un actuador o un sensor. Al integrar este sistema de comunicación por RF, según las pruebas realizadas, se garantiza un buen alcance en la comunicación entre dispositivos de forma instantánea. Este proyecto se desarrolla, ya que, según las estadísticas a nivel nacional y encuestas realizadas, hay un cierto porcentaje de personas adultas mayores con limitaciones físicas, entre la que más se destaca, se conoce como dependencia funcional. Este sistema les brindará una forma de mitigar este tipo de dificultades diarias en el hogar al usuario. El sistema domótico se implementó en las dependencias principales de una vivienda, donde se pone prueba su funcionamiento según la orden o el comando ejecutado.INTRODUCCIÓN 1. PLANTEAMIENTO Y FORMULACIÓN DEL PROBLEMA 2. OBJETIVOS 3. JUSTIFICACION 4. ANTECEDENTES 5. MARCO TEORICO 6. METODOLOGÍA 7. RECOPILACION DE INFORMACIÓN 8. RECOPILACIÓN DE INFORMACIÓN DE LA POBLACIÓN OBJETIVO 9. DISEÑO 10. DESCRIPCIÓN DEL FUNCIONAMIENTO 11. IMPLEMENTACIÓN 12. DESCRIPCIÓN FINANCIERA DEL SISTEMA DOMÓTICO 13. CONCLUSIONES BIBLIOGRAFÍA ANEXOSPregradoIngeniero Electrónic

Role of the ribosome in protein folding

In all organisms, the ribosome synthesizes and folds full length polypeptide chains into active three-dimensional conformations. The nascent protein goes through two major interactions, first with the ribosome which synthesizes the polypeptide chain and holds it for a considerable length of time, and then with the chaperones. Some of the chaperones are found in solution as well as associated to the ribosome. A number of in vitro and in vivo experiments revealed that the nascent protein folds through specific interactions of some amino acids with the nucleotides in the peptidyl transferase center (PTC) in the large ribosomal subunit. The mechanism of this folding differs from self-folding. In this article, we highlight the folding of nascent proteins on the ribosome and the influence of chaperones etc. on protein folding

Nanoscale Functionalization of Surfaces by Graft-Through Sonogashira Polymerization

Graft through Sonogashira polymerization was used to functionalize various surfaces with conjugate polymers in a dimension of less than 100 nm. Atomic force microscopy measurement revealed a dense surface coverage with several closely packed islands. UV-vis spectroscopy and cyclic voltametry measurements suggested a moderate band gap, which is important for various applications in material science. A device was fabricated using polymer functionalized ITO and deposited aluminium as cathode to determine the current-voltage (I-V) characteristics and charge carrier mobility. Space charge limited current method indicated moderate charge carrier mobility while I-V characteristic data indicated its behaviour as semiconducting material

Experimental and Theoretical Investigations of Different Diketopyrrolopyrrole-Based Polymers

Diketopyrrolopyrrole (DPP)-based polymers are often considered las the most promising donor moiety in traditional bulk heterojunction solar cell devices. In this paper, we report the synthesis, characterization of various DPP-based copolymers with different molecular weights, l and polydisper sity where other aromatic repeating units (phenyl or thiophene based) are connected by alternate double bonds or triple bonds. Some of the copolymers were used for device fabrication and the crucial parameters such as fill factor (FF) and open circuit voltage (V-oc) were calculated. The density functional theory was used to optimize the geometries and deduce highest occupied molecular orbital lowest unoccupied molecular orbital gaps of all the polymers and'theoretically predict their optical and electronic properties. Optical properties of all the polymers, electrochemical properties and band gaps were also obtained experimentally and compared with the theoretically predicted values