29 research outputs found
Activities and Stabilities of Au-Modified Stepped-Pt Single-Crystal Electrodes as Model Cathode Catalysts in Polymer Electrolyte Fuel Cells
The purpose of this study is to test
the concept of protecting
vulnerable sites on cathode catalysts in polymer electrolyte fuel
cells. Pt single-crystal surfaces were modified by depositing Au atoms
selectively on (100) step sites and their electrocatalytic activities
for oxygen reduction reaction (ORR) and stabilities against potential
cycles were examined. The ORR activities were raised by 70% by the
Au modifications, and this rise in the activity was ascribed to enhanced
local ORR activities on Pt(111) terraces by the surface Au atoms.
The Au modifications also stabilized the Pt surfaces against potential
cycles by protecting the low-coordinated (100) step sites from surface
reorganizations. Thus, the surface modification by selective Au depositions
on vulnerable sites is a promising method to enhance both the ORR
activity and durability of the catalysts
Catalytic Cycle Employing a TEMPO–Anion Complex to Obtain a Secondary Mg–O<sub>2</sub> Battery
Nonaqueous Mg–O<sub>2</sub> batteries are suitable only
as primary cells because MgO precipitates formed during discharging
are not decomposed electrochemically at ambient temperatures. To address
this problem, the present study examined the ability of the 2,2,6,6-tetramethylpiperidine-oxyl
(TEMPO)–anion complex to catalyze the decomposition of MgO.
It was determined that this complex was capable of chemically decomposing
MgO at 60 °C. A catalytic cycle for the realization of a rechargeable
Mg–O<sub>2</sub> electrode was designed by combining the decomposition
of MgO via the TEMPO–anion complex and the TEMPO–redox
couple. This work also demonstrates that a nonaqueous Mg–O<sub>2</sub> battery incorporating acrylate polymer having TEMPO side
units in the cathode shows evidence of being rechargeable
Anode Material Associated with Polymeric Networking of Triflate Ions Formed on Mg
We have examined anode materials
with anions as an ion transport
species to solve metal deposition in rechargeable batteries intrinsically.
Mg deposition-dissolution tests were conducted using some ionic liquid
electrolytes at 60 °C, and a new electrochemical reaction was
observed in addition to Mg deposition and dissolution in an electrolyte
of Mg(CF<sub>3</sub>SO<sub>3</sub>)<sub>2</sub> and <i>N</i>-methyl-N-propylpiperidinium bis(trifluoromethane sulfonyl)amide.
The reaction was determined to be based on the formation and release
of a polymeric network of triflate ions (CF<sub>3</sub>SO<sub>3</sub><sup>–</sup>) on the Mg metal surface, which suggests a novel
anode material with anion carriers. An anion battery is also demonstrated
using this phenomenon and incorporating an acrylate polymer with 2,2,6,6-tetramethylpiperidine-oxyl
side units in the cathode to provide evidence of the rechargeability
by the intermediary anion carrier
Operando Measurement of Solid Electrolyte Interphase Formation at Working Electrode of Li-Ion Battery by Time-Slicing Neutron Reflectometry
We
report the first operando measurement of solid electrolyte interphase
(SEI) formation at an electrode using in situ neutron reflectometry.
The results revealed the growth of the SEI and intercalation of ions
during the charge reaction. Furthermore, we propose a way of evaluating
the charge used for the SEI formation
Collision detection on transmission lines with optical interferometer
V diplomski nalogi skušamo ugotoviti, v kolikšni meri je možno zaznavati in klasificirati trke na jeklenicah daljnovodov z optičnim interferometrom. Na začetku predstavimo osnovne pojme interferometrije in opišemo uporabljen optični interferometer. V jedru diplomske naloge natančneje opišemo eksperimentalni protokol in obdelavo signalov. Nadaljujemo z implementacijo algoritmov za segmentacijo in klasifikacijo zajetih signalov ter predstavimo dobljene rezultate. Segmentacijo izvedemo v domeni števila prehodov signala skozi ničlo, za klasifikacijo pa uporabimo večplastno nevronsko mrežo z algoritmom vzvratnega učenja. Rezultati študije nakazujejo, da sta implementirani segmentacija in klasifikacija uspešni v 77 % izvedenih trkov različnih predmetov.We analyse feasibility of collision detection on transmission lines with optical interferometer. We first provide a brief introduction into interferometry, along with a description of the optical interferometer used for measurements in this study. Afterwards, we describe the conducted experimental protocol and signal processing methodology. The focus is on implementation of algorithms for signal segmentation and collision classification. We used zero-crossing algorithm to transform signals into segmentation domain. Classification of collisions is done with a multilayer neural network trained by the backpropagation algorithm. The results demonstrate an average success rate of 77% for segmentation and classification of collision with five different objects
Sistematización de la experiencia de un ambiente de aprendizaje enriquecido por TIC durante la práctica clínica en fisioterapia cardiopulmonar en un hospital de nivel II de la ciudad de Cali
Esta investigación se centra en la caracterización de la experiencia de 4 estudiantes de fisioterapia de IX semestre de la Institución Universitaria Escuela Nacional del Deporte (IUEND) durante la implementación de un ambiente de aprendizaje enriquecido con Tecnologías de la Información y la Comunicación (TIC) en la práctica clínico – asistencial en Salud Cardiopulmonar; la cual se fundamenta en el hacer y pone a prueba las bases conceptuales del ciclo de fundamentación; todo esto con el fin de identificar las experiencias significativas que facilitan el aprendizaje y desarrollo de competencias clínicas, además analizar si este tipo de estrategias de enseñanza -aprendizaje permite al estudiante y al docente asesor superar inconvenientes propios de la práctica clínica como: optimizar tiempos de atención a pacientes, estudio independiente y trabajo colaborativo, retomar e integrar gran cantidad de conceptos y procedimientos aprendidos en IV semestre con las nuevas experiencias y la realidad del paciente; y a la vez cumplir con funciones administrativas propios del rol del fisioterapeuta asistencial (estadística, indicadores, desarrollo de guías, etc.) que dificultan el proceso de aprendizaje; concluyendo que los ambientes mediados por TIC pueden lograr superar estas dificultades y favorecer finalmente el aprendizaje significativo (juicio clínico), en el que se fundamenta el ciclo de práctica profesional
DRA001027
List of DRA (http://trace.ddbj.nig.ac.jp/dra/index_e.html) accession numbers
of the FANTOM5 samples, sequences and genomic coordinations.
Files are in tab-delimited format, which includes
* Library ID
* FFID
* BioSamples accession number
* DRA experiment accession number
* DRA run accession numbers
* DRA analysis accession number for genomic coordination (BAM file)
* DRA analysis accession number for CTSS (BED file)
* Experiment method (CAGE/RNA-Seq/sRNA-Seq
assay information of the mouse tissue samples for HeliScopeCAGE
a tab delimited flat file (SDRF file) describing the experimental details for mouse tissue samples for the standard protocol of the HeliScopeCAGE protoco
DRA002216
List of DRA (http://trace.ddbj.nig.ac.jp/dra/index_e.html) accession numbers
of the FANTOM5 samples, sequences and genomic coordinations.
Files are in tab-delimited format, which includes
* Library ID
* FFID
* BioSamples accession number
* DRA experiment accession number
* DRA run accession numbers
* DRA analysis accession number for genomic coordination (BAM file)
* DRA analysis accession number for CTSS (BED file)
* Experiment method (CAGE/RNA-Seq/sRNA-Seq
assay information of the unclassified samples for HeliScopeCAGE
a tab delimited flat file (SDRF file) describing the experimental details for unclassified samples for the standard protocol of the HeliScopeCAGE protoco