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Temporal coherence of single photons emitted by hexagonal Boron Nitride defects at room temperature
No full textColor centers in hexagonal boron nitride (hBN) emerge as promising quantum light
sources at room temperature, with potential applications in quantum communications,
among others. The temporal coherence of emitted photons (i.e. their capacity to inter-
fere and distribute photonic entanglement) is essential for many of these applications.
Hence, it is crucial to study and determine the temporal coherence of this emission un-
der different experimental conditions. In this work, we report the coherence time of the
single photons emitted by an hBN defect in a nanocrystal at room temperature, mea-
sured via Michelson interferometry. The visibility of this interference vanishes when
the temporal delay between the interferometer arms is a few hundred femtoseconds,
highlighting that the phonon dephasing processes are four orders of magnitude faster
than the spontaneous decay time of the emitter. We also analyze the single photon
characteristics of the emission via correlation measurements, defect blinking dynamics,
and its Debye-Waller factor. Our room temperature results highlight the presence of a
strong electron-phonon coupling, suggesting the need to work at cryogenic temperatures
to enable quantum photonic applications based on photon interference.
This dataset includes data from the experiments carried out to investigate the temporal coherence of hBN at room temperature, including photoluminescence (PL) spectra of several hBN emitters under different excitation conditions, time-resolved fluorescence decay, second-order correlation measurements, and Michelson interferometry of single photons. This data has been used to generae the figures included in the publication: "Temporal coherence of single photons emitted by hexagonal Boron Nitride defects at room temperature".
1- "Basic Characterization": Data for the basic characterization of an hBN emitter at room temperature. Contains three subfolders:
PL spectrum
Saturation Curve
Spontaneous decay (T1)
2- "Second order correlation function": Includes data for the second-order correlation function (obtained via the Hanbury-Brown and Twiss experiment) of the same hBN emitter under different excitation powers with pulsed and continuous wave driving. Its is divided in the following subfolders:
G2 CW
G2 Pulsed
3- "Michelson interferometry of an emitter": Includes data for the Michelson fringes (for different path delays) for the emisión of the same hBN emitter considering two filtering regions (ZPL and full spectrum). It is divided in the subfolders:
Full spectrum
ZPL
4-"Michelson interferometry under different excitation conditions": Contains data of three hBN emitters (different from the one characterized in the rest of the dataset) excited with different laser wavelengths. This folder contains data of the PL spectra (for different excitation color) and the corresponding Michelson fringes (for different path delays). This folder is organized as follows:
Emitter I
Michelson Blue
Michelson Green
PL spectra
Emitter II
Michelson Blue
Michelson Green
PL spectra
Emitter III
Michelson Blue
Michelson Red
PL spectra
Data from second-order correlation measurements and Michelson interferometry have been generated by the software Extensible Timetag Analyzer (https://timetag.github.io/).</p
Leishmania braziliensis (strain M2904) sequencing reads generated from total RNA by Oxford Nanopore technology
No full textThis project was aimed to sequence total RNA from Leishmania braziliensis promastigotes using the Oxford Nanopore Technology (ONT) methodology.
This dataset consists of two Fastq files, generated by MinION Mk1C (ONT) MC-114562 device (Basecalling was performed with MinKNOW (ONT) software model version rma002_70bps_hac@v3, with firmware MinION FPGA 2.4.3, ver. 23.07.12. These files are labelled:
i) Lb_ONT_Ene2025_full.fastq.gz, this file contains 1,236,504 reads having an average q-score of 7 or higher;
ii) Lb_ONT_Ene2025_failed_full.fastq.gz, this file contains 20,227 reads that did not pass the filter.
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The reception of Iris Murdoch in Francoist Spain
No full textThe database comprises the publication details of Iris Murdoch's main works in Spain, i.e. The Bell (1958), The Nice and the Good (1968), Bruno's Dream (1969), A Fairly Honourable Defeat (1970), The Black Prince (1973), and Henry and Cato (1970).
The Project "The Reception of English Fiction in Twentieth-century Spain: Editions, Criticism and Censorship" was funded by the Spanish Ministry of Education under the 2007 programme of grants for research projects (Reference HUM2007-63296/FILO).
The research team carried out a study on the reception of English and Irish narrative
in Spain during the 20th century, paying special attention to the problems of censorship that arose during the Franco regime.</p
Self-assembly of chemically programmed amphiphiles into aqueous nanotubes with a lipophilic lumen
No full textThe creation of complex hollow nanostructures with precise control over size and shape represents a great challenge in supramolecular soft materials. Here, we have further developed a bioinspired methodology for the formation of aqueous nanotubes of well-defined dimensions and pore coating through the self-assembly of amphiphiles that are chemically programmed with complementary nucleobases. These nanotubes are endowed with a hydrophobic lumen, whose diameter can be expanded as a function of the monomer length, in which apolar dyes can be efficiently encapsulated.
Decription of the dataset: Structural and supramolecular characterization of nanostructures</p
Company size, online reviews and customer responses: implications for SMEs in the hospitality field
No full textThis project analyzes the impact of customer journey automation through Artificial intelligence on customer engagement, mediated by brand experience, social cognition and psichological ownership.
The dataset includes 3 files employed in the publication "Company size, online reviews and customer responses: implications for SMEs in the hospitality field".</p
Cognitive profile in PD
No full textThe Project was designed to analyze the cognitive heterogeneity in PD patients using a novel data driven approach, the Latent Profile Analysis (LPA), to classify patients according to cognitive characteristics.
This dataset include information about general and specific cognitive perfomance in 71 PD patients without dementia. The neuropsychological battery included different memory and executive function tests. Memory was assessed both for semantic and episodic capabilities. Semantic memory was assessed with a Semantic fluency task (SF; Benton and Hamsher, 1978) and the Boston Naming Test (BNT; Kaplan and Weintraub, 1983). Episodic memory was assessed both with verbal and visuospatial material. Verbal episodic memory was assessed using the Spain-Complutense Verbal Learning Test (Test de Aprendizaje Verbal España-Complutense, TAVEC; Benedet and Alexandre, 1998), and visuospatial episodic memory was assessed using the 7/24 Spatial Recall Test (7/24 SRT; Rao, Hammeke, McQuillen, Khatri, and Lloyd, 1984). Executive function was assessed using the Phonemic Fluency Task (PF; Benton and Hamsher, 1978), the Backward Digit Span of the WAIS-III (BDS; Weschler, 2001) and the Trail Making Test (TMT; Reynolds, 2002). They were selected following the recommendation for neuropsychological evaluation of PD made by the Movement Disorder Society Task Force Guidelines (Litvan et al., 2012).</p
UAM primary and pre-primary student teachers´ opinions about the effectiveness of bilingual education programs in Spain
No full textStudent teachers are often excluded from discussions about educational programs that could significantly influence their professional development in the short or medium term. This project seeks to address this research gap by exploring the views of pre-primary and primary teacher trainees regarding bilingual education programs (BEPs) in Spain.
The dataset presents the answers provided by 170 prospective teachers of primary and pre-primary at the University Autónoma of Madrid to a questionnaire, which consists of 17 close-ended items distributed into three blocks. In addition to the independent variables and sub-variables of the study (sex, age, degree, year, specialisation, and self-perceived level of English proficiency), items enquired about the trainees’ opinions regarding the regional BEP, its effectiveness in class, and its impact on their future professional careers, as well as a set of open questions related to the student teachers’ experiences and opinions on BEPs.</p
Datos de trabajo para el curso “Datos de investigación: Introducción a la visualización de datos con Tableau Public”
No full textDescripción del dataset
Datos utilizados en las sesiones del curso “Datos de investigación: Introducción a la visualización de datos con Tableau Public”
Descripción del proyecto
Mediante la participación en este curso, se espera que las personas participantes obtengan las siguientes competencias:
• Conocer los principios de visualización de datos a través de gráficos
• Manejar la plataforma Tableau Public
• Realizar gráficos y cuadros de mando
Metolodogía (empleada para la recogida o generación de los datos)
Datos extraidos del Portal de datos abiertos del Gobierno de la Ciudad de México. Adaptados para su trabajo en Tableau con OpenRefine.
Fuente: https://datos.cdmx.gob.mx/dataset/victimas-en-carpetas-de-investigacion-fgj
Software
Los talleres se basan en el uso de Tableau Public.
Enlace de descarga:https://www.tableau.com/es-es/products/public/download
Instalación disponible para Windows y Mac
World map of geomagnetic disturbances for 2003 (LDi-GMap 2003)
No full textThe world map of geomagnetic disturbances are images of the world with contour plot of the level of geomagnetic disturbance in a scale from -9 to +9 (only integer numbers). The contour plots are also filled with a color corresponding for each level.
Data input is obtained after processing measurements of the horizontal geomagnetic field taken at different observatories.</p
Replicación de datos para: Valorization of refinery sludges by hydrothermal carbonization towards circular economy
No full textDespite continuous efforts by the petroleum industry to address societal needs, the effective management of potentially hazardous wastes, such as refinery sludge, remains a significant challenge. Refinery sludge is a stable emulsion comprising water, petroleum hydrocarbons (e.g., oils, fats, organic compounds), solids, and metals. Hydrothermal carbonization (HTC) is a promising and environmentally friendly approach for valorizing oily sludge from refineries, given its adaptability and high efficiency in processing wet or high-moisture-content organic wastes. This study aims to systematically evaluate the effects of three key factors—initial sludge composition (through the mixing of three distinct real oily sludge streams from refinery), HTC temperature, and reaction time—on the properties of the resulting hydrochar, aqueous phase and oily phase. This scope was reached through a full factorial design of experiments and a deepened characterization of the as-received petrochemical samples and the separated HTC products. The study resulted in predictive models for 32 response variables associated with the HTC process using real refinery sludge mixtures. These variables include the HTC product distribution, hydrochar yield, higher heating value (HHV) of produced hydrochar, and the characteristics of the process water, among others. The developed models provide a reliable framework for optimizing HTC outputs and forecasting quality variations in response to changes in the operating conditions studied