Search results for "DEVICES"
showing 10 items of 615 documents
Optical Gating of Photosensitive Synthetic Ion Channels
2011
4-oxo-4-(pyren-4-ylmethoxy) butanoic acid is used as a photolabile protecting group to show the optical gating of nanofluidic devices based on synthetic ion channels. The inner surface of the channels is decorated with monolayers of photolabile hydrophobic molecules that can be removed by irradiation, which leads to the generation of hydrophilic groups. This process can be exploited in the UV-light-triggered permselective transport of ionic species in aqueous solution through the channels. The optical gating of a single conical nanochannel and multichannel polymeric membranes is characterised experimentally and theoretically by means of current-voltage and selective permeation measurements,…
Satisfied or Frustrated? A Qualitative Analysis of Need Satisfying and Need Frustrating Experiences of Engaging With Digital Health Technology in Chr…
2020
Introduction: Digital health technologies such as self-monitoring devices and apps are becoming increasingly important as tools to promote healthy habits and support individuals in their self-care. There is still a scarcity of research that builds on motivational theory to better understand the functioning of digital health technologies. The self-determination theory (SDT) is a macro theory of motivation that delineates three basic psychological needs that are linked to different types of motivation and lead to well-being when satisfied and illbeing when frustrated. Objective: To explore how the use of a digital tool for self-monitoring and communication with healthcare satisfies or frustra…
Retoriskie līdzekļi IKEA satura mārketinga tekstos
2018
Mūsdienu patērētāji dod priekšroku zīmoliem, kuru vērtību sistēma ir tāda pat kā šo patērētāju. Viņi atzīst par labāku individualizētu pieeju sev, izklaidējošu saturu, kurā dalīties ar saviem kontaktiem, daudz vizuālās informācijas un emocionālus stāstus. Tāpēc bakalaura darba mērķis bija izpētīt, cik plaši IKEA izmanto retoriskos līdzekļus satura mārketinga tekstos IKEA tīmekļa lapā Apvienotajā Karalistē, lai izraisītu pozitīvu klientu atbildes reakciju. Tā kā IKEA tiek uzskatīts par satura mārketinga gigantu no IKEA Apvienotās Karalistes mājaslapas tika izvēlēti 20 raksti, kuri tika analizēti. Pētījuma rezultāti parādīja to, ka retoriskie līdzekļi tika izmantoti 83 reizes. Visizplatītākās…
COMBINED USE OF INNOVATIVE PASSIVE CONTROL DEVICES AND CONVENTIONAL BASE ISOLATION STRATEGIES
2021
This manuscript contains the main part of my research performed in the last three years at the Department of Engineering, University of Palermo, at the Department of Basic Sciences in Engineering Sciences (Unit of Applied Mechanics), University of Innsbruck, Austria and at the company FIP Mec, Selvazzano Dentro, Padova. Within the research framework of Structural Control, this dissertation proposes novel passive control strategies to mitigate the dynamic response of base isolated structural systems. Among the several types of devices proposed in literature, Tuned Mass Dampers and Tuned Liquid Column Dampers are undoubtedly the most widely employed vibration control devices for coupling with…
A photoactivated molecular gate.
2012
Light-controlled gate: A novel capped silica nanoscopic mesoporous hybrid material for photo-driven cargo release applications has been designed and prepared. The capped system, which shows a zero release, contains a photo-cleavable bulky o-methoxybenzylamine derivative. Upon irradiation at 254¿nm, photo-degradation of the o-methoxybenzylamine framework and the subsequent delivery of a fluorescent cargo were observed
An AC-assisted single-nanowire electromechanical switch
2013
A unique two-source controlled nanoelectromechanical switch has been assembled from individual, single-clamped Ge nanowires. The switching behaviour was achieved by superimposing the control signals of specific frequencies to the electrostatic potential of the output terminals, eliminating the need for an additional gate electrode. Using an in situ manipulation technique inside a scanning electron microscope, we demonstrate that the pull-out force required to overcome adhesion at the contact can be significantly reduced by exciting mechanical resonant modes within the nanowire.
Information Dynamics of the Brain, Cardiovascular and Respiratory Network during Different Levels of Mental Stress
2019
In this study, an analysis of brain, cardiovascular and respiratory dynamics was conducted combining information-theoretic measures with the Network Physiology paradigm during different levels of mental stress. Starting from low invasive recordings of electroencephalographic, electrocardiographic, respiratory, and blood volume pulse signals, the dynamical activity of seven physiological systems was probed with one-second time resolution measuring the time series of the &delta
Estudio interuniversitario en estudiantes de Ciencias de la Salud: uso de los dispositivos móviles con fines educativos
2021
[EN] The use of smartphones, despite being mainly social, has begun to be implemented in the university environment as a tool for working in class and for communication between students regarding teaching material. However, before creating teaching methodologies that use these devices, it is important to know the opinion that the students have of them. Our objective was to analyze the personal and academic use of Smartphones by Health Sciences students from different Universities. With this objective, a form was created consisting of sociodemographic questions and the Questionnaire on perceptions and attitudes towards learning through mobile devices (CPAAM). Subsequently, a descriptive anal…
Self-Immolative Linkers as Caps for the Design of Gated Silica Mesoporous Supports
2016
A new hybrid material based on sulforhodamine-B dye-loaded silica mesoporous nanoparticles capped with a self-immolative gate has been synthesized and characterized. The gated material's controlled release behavior is monitored under different pH conditions. Under acidic and neutral conditions, a low level of dye release is detected. However, at slightly basic pH, significant dye release occurs owing to deprotonation of the phenol moiety in the capping molecule, which results in its disassembly.
HALE-IoT: HArdening LEgacy Internet-of-Things devices by retrofitting defensive firmware modifications and implants
2022
Internet-Of-Things (IoT) devices and their firmware are notorious for their lifelong vulnerabilities. As device infection increases, vendors also fail to release patches at a competitive pace. Despite security in IoT being an active area of research, prior work has mainly focused on vulnerability detection and exploitation, threat modelling, and protocol security. However, these methods are ineffective in preventing attacks against legacy and End-Of-Life devices that are already vulnerable. Current research mainly focuses on implementing and demonstrating the potential of malicious modifications. Hardening emerges as an effective solution to provide IoT devices with an additional layer of d…