Transparent Conductive Ink for Additive Manufacturing

NASA analyzes, tests, packages, and fabricates electrical, electronic, and electromechanical (EEE) parts. Nanotechnology is listed in NASA's Technology Roadmap as a key area to invest for further development.1 This research project focused on using nanotechnology to improve electroluminescent lighting in terms of additive manufacturing and to increase energy efficiency. Specifically, this project's goal was to produce a conductive but transparent printable ink that can be sprayed on any surface for use as one of the electrodes in electroluminescent device design. This innovative work is known as thick film dielectric electroluminescent (TDEL) technology. TDEL devices are used for "backlighting, illumination, and identification due to their tunable color output, scalability, and efficiency" (I.K. Small, T.D. Rolin, and A.D. Shields, "3D Printed Electroluminescent Light Panels," NASA Fiscal Year 2017 Center Innovation Fund Proposal, unpublished data, 2017). These devices use a 'front-to-back' printing method, where the substrate is the transparent layer, and the dielectric and phosphor are layered on top. This project is a first step in the process of creating a 3D printable 'back-to-front' electroluminescent device. Back-to-front 3D-printed devices are beneficial because they can be printed onto different substrates and embedded in different surfaces, and the substrate is not required to be transparent, all because the light is emitted from the top surface through the transparent conductor. Advances in this area will help further development of printing TDEL devices on an array of different surfaces. Figure 1 demonstrates the layering of the two electrodes that are aligned in a parallel plate capacitor structure (I.K. Small, T.D. Rolin, and A.D. Shields, "3D Printed Electroluminescent Light Panels," NASA Fiscal Year 2017 Center Innovation Fund Proposal, unpublished data, 2017). Voltage is applied across the device, and the subsequent electron excitation results in light emission at the top layer

Automobile\u27s hydraulic system controlled by a programmable logic controller

The purpose of our design is to control the fluctuation of an automobile\u27s hydraulic system using a Programmable Logic Controller (PLC). An Automation Direct PLC is programmed with DirectSoft 32 Relay Ladder Logic Stage Programming software. In addition, an Autoloc remote is used to activate the PLC; magnetic positioning sensors, the PLCs ladder logic program and the hydraulic system-consisting of solenoids/pumps and dumps-are the main components for our design. We intend to use the same ideas and design methods as in industry applications to control the hydraulics of a Lowrider vehicle. The overall process will be the same; PLC will control, execute program; and therefore, satisfy the customer. An important feature of our design is that it will eliminate the use of a switch box and a 15-foot cable; and with just a simple PLC and the push of the button on a remote, the motion of the hydraulic system on a vehicle will controlled \u27hands-free\u27. Our design will give the Lowrider community a new technology option for the control of their Lowrider\u27s hydraulic system

Fabrication and Characterization of Polylactic Acid and Polylactic Acid/Multi-Walled Carbon Nanotube Nanofibers Through Centrifugal Spinning

Biocompatible polymer nanofibers hold great potential in the biomedical engineering field. Their biodegradable nature and enhanced properties could help solve a wide array of health related problems, particularly in the areas of tissue regeneration, drug delivery, and biosensor design. The novel ForcespinningTM method allows the production of submicron fibers without many of the drawbacks found in electrospinning, while also providing a substantial increase in fiber production. The aim of the study was to utilize this method to fabricate non-woven nanofibrous mats composed of polylactic acid (PLA) and polylactic acid/multi-walled carbon nanotube composite fibers. The morphology, thermal properties, and crystalline structure of the resulting nanofibers were then characterized using Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM), Thermogravimetric Analysis (TGA), Differential Scanning Calorimetry (DSC), and X-Ray Diffraction (XRD)

¿Qué es el estrés laboral y cómo medirlo?

El presente trabajo pretende analizar qué es el estrés laboral y fundamentar la importancia de realizar evaluaciones e investigaciones en las organizaciones para lo cual se señalan los instrumentos de medición más relevantes identificados en la literatura. El estrés laboral afecta negativamente a la salud psicológica y física de los trabajadores. En la actualidad el estrés laboral es uno de los principales problemas para la salud de los trabajadores y el buen funcionamiento de las organizaciones. Un trabajador que está estresado presenta con mayor frecuencia enfermedades, está poco motivado, es menos productivo y tiene menos seguridad laboral. El estrés laboral es una reacción que presenta el trabajador ante exigencias y presiones laborales que no se ajustan a sus capacidades y recursos y que ponen a prueba su capacidad para afrontar una situación. Esta situación se agrava cuando el trabajador no recibe el suficiente apoyo de sus compañeros de trabajo o de sus superiores y cuando cuenta con un control limitado sobre su trabajo para hacer frente a las exigencias y presiones laborales. Diversos estudios reportan que el estrés laboral se presenta a ritmo creciente en casi todos los países del mundo. Las estadísticas reportadas ubican al estrés laboral como la segunda causa en los problemas de salud de la población trabajadora

The Strategic Use of Shifting Point of View Narrations in Imogen Binnie’s Nevada

Imogen Binnie’s Nevada has become a cornerstone for trans studies for nearly a decade. Since it was first published in 2013, it has become a staple in trans literature, challenging literary traditions and all-too-common coming-of-age stories that end in a predictable format of profound self-discovery, apotheosis, and personal transformation. Binnie’s Nevada does not end with such a resolutive arc. It complicates and leaves open some of the complexities of the trans experience that cannot be captured by normative literary conventions. I will examine Nevada’s subversion of literary point of view conventions, specifically shifting and unstable point of view narrations—moving continuously between first-, second-, and particularly third person limited and omniscient narrative structures—which complicate our understandings of the relationship between (a trans) self and larger sociality that the novel aims to reveal. In addition, I will argue that Cameron Awkward-Rich’s concept of the “lyrical subject”—which posits subjectivity as a simultaneous experience of interiority and publicity—can be demonstrably portrayed and exemplified through the overall literary and shifting point of view structure in Binnie’s Nevada. This showcases the ways publicity and sociality inform an interiority of withdrawal and uncertainty that Maria and James, the story’s main protagonists, both endure. As such, I will analyze these shifting points of view in Nevada and read them as complicating traditional point of view narrations while discovering a deeper irony, instability, and complexity about the trans experience of subjectivity, illustrating why this novel should remain such a profound staple in trans literature for decades to come

超微結晶金属のひずみの局在化と疲労 : アコースティックエミッションによる解析

取得学位：博士(学術)，学位授与番号：博甲第486号，学位授与年月日：平成14年3月22日,学位授与年：200

Diseño y fabricación de nanotransportadores de medicamentos hidrófobos

La nanotecnología fue desarrollada con la finalidad de mejorar las tecnologías ya existentes, debido a que el uso de ésta ayuda a disminuir la inversión de tiempo y dinero en el desarrollo de sistemas a esta escala. Ha sido de gran importancia en muchas áreas de investigación, pero una en la que más ha resaltado es en la bionanotecnología, esto ya que se han desarrollado sistemas a esta escala que ayudan a identificar y tratar de erradicar muchas enfermedades, entre estas el cáncer. El cáncer ha ido en aumento en los últimos años debido a los malos hábitos que tendemos a tener como sociedad, en cuestiones alimenticias, ritmo de vida, entre otras. Esta enfermedad maligna puede desarrollarse en cualquier tejido del cuerpo de un ser vivo, cuando las células se dividen y crecen de manera incontrolada formando un tumor, si se trata de un cáncer metastásico, este puede migrar de su lugar de origen y proliferar en otros lados del cuerpo. Actualmente los fármacos que se utilizan en las quimioterapias son muy tóxicos para las personas y tienden a tener efectos secundarios graves, debido a esto, es necesario continuar desarrollando sistemas que ayuden a disminuir estos niveles de toxicidad. El desarrollo de las partículas tipo virus (VLPs, por sus siglas en inglés) ha ayudado a combatir muchas enfermedades, debido a que las VLPs son nanotransportadores que consisten en la cápside de un virus purificado, al cual se le extrae su material genético y puede transportar medicamentos, genes externos, vacunas, etc. Al usarse un virus de origen vegetal para el desarrollo de VLPs no hay riesgo de una reacción inmune en contra de partículas virales, ya que estos se caracterizan por solo infectar y replicarse en plantas, no podrían hacerlo en animales. Al introducir medicamentos anticancerígenos en estas partículas, se espera que al entrar a la célula puedan ejercer su acción con la dosis mínima necesaria para ejercer su acción, sin matar muchas células normales. El desarrollo de VLPs con virus como el CCMV ha tenido gran importancia en la actualidad ya que son fáciles y económicos de obtenerse.Nanotechnology was developed with the purpose of improving existing technologies, because the use of it helps to reduce the investiment of time and money in the development of systems on this scale. It has been of great importance in many research areas, but one in which it has stood out is in bionanotechnology, since systems have been developed on this scale that help to identify and try to eradicate many diseases, including cancer. Cancer has been increasing in recent years due to the bad habits that we tend to have as a society, in terms of food, lifestyle, among others. This malignant disease can develops in any tissue of the body of a living being, when the cells have an uncontrolled cell division giving a tumor cell, in the case of tumor metastasis, the malignant cells migrate from the origin tumor place and proliferate in a new organs. Currently, the drugs used in chemotherapies are very toxic to people and tend to have serious secondary effects, due to that, it is necessary to continue developing systems to helps for reduce these levels of toxicity. The development of virus-like particles (VLP) has helped fight many diseases, because VLPs are nanocarriers that consist of the capsid of a purified virus (from which the genetic material is eliminated from them) and they can carry drugs, foreign genes, vaccines, etc. When using a virus of plant origin for the development of VLPs, there is no risk of an immune reaction against viral particles, since these are characterized by only infecting and replicating in plants, they could not do so in animals. By introducing anticancer drugs into these particles, the aim is when they enter into the cell, they will be able to exert their action with the minimum necessary dose, without affecting normal cells. The development of VLPs like CCMV has been of great importance nowadays since they are easy and cheap to obtain.Beca, 788069, Consejo Nacional de Ciencia y Tecnología.InvestigadoresEstudiante

Pursuing a voice with poetic-economic freedom in a hemispheric indigenous marketplace : exploring Otavalan Runa linguistic and visual creations in a global economy

Based on 17 months of fieldwork in the Kichwa-speaking and Runa-populated town of Otavalo located in the northern Andes of Ecuador, this dissertation ethnographically considers the linguistic and visually mediated strategies some Otavalan Runa tourism hosts rely on in their pursuit for a kind of poetic-economic freedom to develop their voices in a global ethnic art and tourism economy. Runa pursuits for freedom of self-representation in cultural commodification are embedded in their histories of inter-ethnic and trans-indigenous interactions within the context of tourism. During their dialogues and exchanges with these three broadly defined market participations: tourists, anthropologists, and other indigenous people, Runa merchant and creative voices have institutionally and historically dealt with unequal narrative (Hymes 1996) and economic (Cattelino 2008) representation that impinge on their rights to speak on their own political and cultural terms (Kroskrity and Webster 2015). I contend that we, as visitors and allies to Runa and other indigenous merchant-creatives like them, can adopt lessons learned in "critical" (Smalls and Davis 2023; Alim, Reyes, and Kroskrity 2020) and "discourse-centered" approaches (Sherzer 1987; Urban 1991; Hill 2008) for examining indigeneity and ethnic discrimination to help free their voices from linguistic and economic inequalities characterized in large part by double-standards for the performing and manufacturing of Runa-made "American Indian" visual and verbal art. These complicated expectations from foreigners for Runa linguistic and visual authenticity can also lead to inter-ethnic misconceptions of Runa and "American Indian" identities in Otavalo and especially abroad as migrant workers. This ethnographic study, then, presents a poetic and economic window into the unique and adaptive ways some indigenous entrepreneurs and narrators of culture strategically deploy Runa practices of cultural borrowing, poetic language, marketplace etiquette, migration, intimacy, and dialogue to generate Runa narrative agency and culturally meaningful claims to indigenous belonging in the Americas.Anthropolog