159 research outputs found
LODE
No full textDream EEG and Mentation (DREAM) data set
---Data set information---
Common name: LODE
Full name: The Language of Dreams
Authors: Valentina Elce, Damiana Bergamo, Giulia Avvenuti, Michele Bellesi, Giulio Bernardi
Location: Italy
Year: 2020 - Ongoing
Set ID: 3
Amendment: 0
Corresponding author ID: 6
Previous publications:
N/A
Correspondence:
For information about the study or to request access to additional data, please contact Giulio Bernardi, IMT School for Advanced Studies Lucca, [email protected]
---Metadata---
Key ID: 3
Date entered: 2022-11-03T09:21:31+00:00
Number of samples: 190
Number of subjects: 28
Proportion REM: 33%
Proportion N1: 4%
Proportion N2: 62%
Proportion experience: 62%
Proportion no-experience: 31%
Proportion healthy: 100%
Provoked awakening: No
Time of awakening: Morning
Form of response: Free
Date approved: 2022-11-03T09:22:12+00:00
---How to decode data files---
The folder "Questionnaires" contains the total scores for Pittsburgh Sleep Quality Index (PSQI), Eppworth Sleepiness Scale (ESS), and Morningness-Eveningness Questionnaire, in CSV files. For PSQI, the 7 classical subcomponents (subjective sleep quality, sleep latency, sleep duration, sleep efficiency, sleep disturbances, use of sleeping medication, and daytime dysfunction) are included in addition to the total score.
--Treatment group codes--
N/A
---Experimental description---
Important Note: This is an ongoing project (current version: 0.3, June 2022). Data collection is expected to reach an end in 2023. The dataset will be updated with additional subjects as soon as these are collected and processed. Additional data -including data obtained from cognitive tests and questionnaires- will be made available at the end of the project.
The study involves only heatlhy adult subjects. Specifically, the following inclusion criteria are applied: age 18-65, inclusive; relatively regular sleep-wake patterns; Italian only as mother tongue. The following exclusion criteria are also applied: less than 6 or more than 9 hours of sleep per night (on average); neurological, psychiatric or neurodegenerative diseases; major sleep disorders; use of medications that could affect sleep patterns, brain functioning, or behavior; known alterations of dream or imagery generation; alcohol or drug abuse; pregnancy or breastfeeding.
All volunteers undergo an anamnestic interview and are requested to complete several questionnaires including Pittsburgh Sleep Quality Index (PSQI), Epworth Sleepiness Scale (ESS) and Morningness-Eveningness Questionnaire.
Upon recruitment in the study, participants are provided with a DREEM portable EEG system, an actigraphy (MotionWatch8, CamNtech) and a voice recorder. Then, they are instructed to wear the DREEM each night at home for a minimum of 14 days and to record each morning, upon awakening from sleep, "everything that was going through their mind just before they woke up, everything they remember, every experience or thought they had before awakening." All participants are instructed to produce a verbal report also in those cases in which they had no experiences (no recall), or they had experiences the details of which they are not able to remember (white dreams).
At the end of the 14-days period, all volunteers participate in an additional experimental visit in the laboratory, during which they complete a battery of behavioral and cognitive tests.
--DREAM categorization procedure--
All verbal reports are evaluated and categorized as: "experience" [2], if the participant was able to remember at least one content of any kind (perceptual experience, thought, emotion, etc.); "without recall" [1], if the participant reported the impression of having had an experience, but no contents were recalled; "No experience" [0], if the participant reported no memory or impression of having had an experience before the awakening.
---Technical details---
All recordings were performed in Italy, in the participants' home environment, and may contain line noise at 50 Hz. A list of (manually marked) EEG bad channels is included in the last column of the Records.csv file (see Data preprocessing section).
Pulse-Oximeter recordings of subject DL049 - night 4 were lost due to technical issues and were replaced with zero-filled timeseries.
--Data acquisition--
The DREEM device is equipped with five EEG dry electrodes (from which 7 derivations are obtained: Fp1-O1, Fp1-O2, Fp1-F7, F8-F7, F7-O1, F8-O2, Fp1-F8) to record brain activity during sleep, a pulse sensor, for measuring blood oxygen saturation and monitoring heart rate and a 3D accelerometer to measure head position and respiratory rate. EEG signals are recorded with 250 Hz sampling frequency while non-EEG signals are recorded with 50 Hz sampling frequency.
Each EDF file contains the following signals (in this specific order): EEG Fp1-O1, EEG Fp1-O2, EEG Fp1-F7, EEG F8-F7, EEG F7-O1, EEG F8-O2, EEG Fp1-F8, Accelerometer-X, Accelerometer-Y, Accelerometer-Z, Pulse-Oximeter (red), Pulse-Oximeter (infrared).
--Data preprocessing--
From each recording, we extracted 140 seconds of data up to the moment of awakening. In order to allow the inclusion of EEG and non-EEG signals within the same EDF file, non-EEG signals were upsampled to 250 Hz using the MATLAB "resample" function. All signals were detrended using robust detrending Cheveigné and Arzounian, NeuroImage, 2018). The raw recordings (including uncut, whole-night data) may be requested by contacting the corresponding author.
The moment of awakening estimated from EEG signals was compared with the one derived from actigraphic data, as calculated by the MotionWare Sleep Analysis software (CamNtech). All cases presenting a mismatch greater than +/- 5 minutes between the two estimates were re-evaluated and subsequently rejected if we could not exclude removal of the DREEM band by the participant before the actual final awakening.
The time of day of each verbal recording was compared with the last awakening's timing as determined based on EEG data inspection. Only verbal reports collected within 1 hour from the moment of awakening were retained in order to exclude delayed reports that may reflect false memories or elaborations/interpretations of the original experience, while also accounting for factors that may limit the possibility to provide an immediate verbal report in the home environment. This time threshold was not applied for "no experience" reports. Most reports were provided within 10 minutes from the moment of awakening.
We excluded awakenings corresponding to "experience" or "experience without recall" reports in which the participant only described (potential) experiences that occurred earlier during the night (e.g., "I am not sure about my last experience, but earlier tonight I dreamed of [...]).
Sleep scoring was initially performed by the embedded automatic algorithm of the DREEM headband (see Arnal et al., SLEEP, 2020). A human operator re-inspected all recordings and changed the stage attributed to the last sleep epoch in case of clear mistakes of the automated algorithm. Specifically, the following changes were made:
REM --> N2 for DL021 night 15, DL024 night 3, DL027 night 14, DL042 night 9, DL055 nights 6 and 12, DL062 night 6;
N2 --> REM for DL030 night 11, DL070 night 15;
N2 --> N1 for DL005 night 9;
N1 --> N2 for DL017 night 9.
The EEG signals were visually inspected to mark bad channels and relevant artifacts. Of note, data inspection was performed using bandpass filtered signals (0.5-35Hz, Kaiser window FIR filter). Rapid eye movements of REM sleep were not marked unless they were associated with major artifacts (e.g., signal amplitude greater than 300 µV). Only data segments with at least two "good" EEG channels were retained. Importantly, the quality of non-EEG signals was not assessed.</p
Evaluation of Plastic Deformation During Metal Forming by Using Lode Parameter
No full textIn the present research, the relationship between the strain increment and Lode parameter was obtained by using Lode parameter and Levy-Mises equation. The quantitative relation between different strain increments was presented and the relationship between plastic deformation types and Lode parameter was demonstrated. The relations between plastic deformation types and stress states were revealed and they were applied into typical metal forming process. The strain types in the workpiece were analyzed based on the numerical visualization of the values of Lode parameter. This research reveals the important role of the Lode parameter in the analysis of metal flow behavior during metal forming process.Materials Science and EngineeringMechanical, Maritime and Materials Engineerin
A new yield criteria including the effect of lode angle and stress triaxiality
No full textAbstractAccording to several experiments reported in the literature, the elastoplastic behaviour of metals depends not only on the first stress invariant (triaxiality) for the ductile damage and on the second stress invariant (equivalent von Mises stress) for the yield, but also on the third stress invariant (normalized Lode angle X) which may affect at the same time the yielding and the ductile failure.In this paper a new yield model is presented, where the yield surface depends on the Lode Angle and, eventually, also on the triaxiality ratio.The proposed model is identified by a calibration parameter expressing the degree of nonlinearity of the yield with respect to the Lode angle, and a calibration function expressing the maximum variability of the hardening stress at the two extremities of the Lode angle range, corresponding to the uniaxial and to the pure shear stress states.The proposed model has been tested against several experimental data from the literature on the Titanium alloy Ti6Al4V, including mixed tension-torsion loading which allowed to control the evolution of X and to confine its values into different narrow ranges for better investigating the Lode angle effects on the yield response
About the Lode angle infuence in ductile fracture
No full textDuctile fracture is a local phenomenon and the state of stress and strain in potential fracture locations should be determined [Bai and Wierzbicki, 2008]. In particular, it is known that the stress state affects the growth rate of cavities (See Lassance et al. [2007] for further references). When the stress triaxiality is not enough to describe the stress state, we can use the Lode parameter [Zhang et al., 2001]. Originally proposed by Lode [1926], this parameter includes the second and third invariant of the deviatoric stress tensor. In this report a state of the art is presented showing the influence of this parameter into micro/macro mechanical models and damage development. Different definitions of the Lode angle exists depending on the author, and they are also presented
Lode, Logse y logepced: 3blepupqne
No full textThe author applies to the current education system what biologists call "catastrophe error" to explain the change experimented by an ecosystem when, in a deterioration process, ore or more factors make it nonreversible. The article describes the four "catastrophic errors", whose accumulation has determined that Spanish education has overcome the "critical threshold", from which the system extinguishes and it is unable of regenerating itself. The demands in a cultural, scientific and technological environment that is ruled by efficiency, demand and competitivity cannot be solved by the educative method introduced by LODE, LOGSE and LOPEGCED, inspired on a socialist society and economy. That is the reason why they are 3 Buenas Leyes Educativas Para Un País Que No Existe (3BLEPUPQNE) [3 Good Educative Laws For a Country That Does Not Exist].El autor aplica al sistema educativo vigente, lo que los biólogos llaman "error catástrofe" para explicar el cambio que sufre un ecosistema cuando, sometido a un proceso de deterioro, uno o más factores lo hacen irreversible. El artículo describe los cuatro "errores catastróficos'; cuya acumulación ha determinado que la educación española haya superado el "umbral crítico", a partir del cual el sistema se agota y ya es incapaz de regenerarse a sí mismo. Las exigencias de un entono cultural, científico y tecnológico presidido por la eficacia, la exigencia, la competitividad, no pueden ser resueltas por el modelo educativo implantado por LODE, LOGSE y LOPEGCED, inspirado en una sociedad y economía socialista. De ahí la afirmación de que son 3 Buenas Leyes Educativas Para Un País Que No Existe (3BLEPUPQNE)
Una poesia d'amore somala: "Lode di donna" di Abdullahi Suldaan
No full textL'articolo presenta la poesia d'amore somala "Ammaan Dumar" (Lode di donna) con relativi traduzione in italiano e commento, a cui seguono alcune osservazioni sulle analogie con l'antica poesia d'amore italiana.Maqaalku muxuu soo bandhigayaa maanso soomaaliyeed oo jacay ku saabsan "Ammaan dumar" oo raacsan tarjumaad Af-taliyaani iyo faallo, wuxuuna sii raacsiiyay falanqayn uu ku muujinayo meelaha ay isaga egyihiin mansadan iyo mansadii hore ee taliyaaniga ee jacalyka ku saabsan.The article presents the Somali love poem "Ammaan Dumar" (Praise of a woman) with Italian translation and comment, the author then illustrates some similarities with Italian love poetry
LODE, LOGSE y LOPEGCED: 3BLEPUPQNE
No full textEl autor aplica al sistema educativo vigente, lo que los biólogos llaman "error catástrofe" para explicar el cambio
que sufre un ecosistema cuando, sometido a un proceso de deterioro, uno o más factores lo hacen irreversible. El
artículo describe los cuatro "errores catastróficos'; cuya acumulación ha determinado que la educación española
haya superado el "umbral crítico", a partir del cual el sistema se agota y ya es incapaz de regenerarse a sí mismo.
Las exigencias de un entono cultural, científico y tecnológico presidido por la eficacia, la exigencia, la
competitividad, no pueden ser resueltas por el modelo educativo implantado por LODE, LOGSE y LOPEGCED,
inspirado en una sociedad y economía socialista. De ahí la afirmación de que son 3 Buenas Leyes Educativas Para
Un País Que No Existe (3BLEPUPQNE).The author applies to the current education system what biologists call "catastrophe error" to explain the change
experimented by an ecosystem when, in a deterioration process, ore or more factors make it nonreversible. The
article describes the four "catastrophic errors", whose accumulation has determined that Spanish education has
overcome the "critical threshold", from which the system extinguishes and it is unable of regenerating itself. The
demands in a cultural, scientific and technological environment that is ruled by efficiency, demand and
competitivity cannot be solved by the educative method introduced by LODE, LOGSE and LOPEGCED, inspired
on a socialist society and economy. That is the reason why they are 3 Buenas Leyes Educativas Para Un País Que
No Existe (3BLEPUPQNE) [3 Good Educative Laws For a Country That Does Not Exist].Grupo de Investigación FORCE Universidad de Granad
An empirical assessment of co-activity among German professors
No full textThe growing importance of technology relevant non-publication output of university research has come into the focus of policy-makers? interest. A fierce debate arose on possible negative consequences of the increasing commercialization of science, as it may come along with a reduction in research performance. This paper investigates the relationship between publishing as a measure of scientific output and patenting for German professors active in a range of science fields. We combine bibliometric/technometric indicators and econometric techniques to show that patenting positively correlates with, first, the publication output and, second, with publication quality of patenting researchers. --academic inventors,patents,publications
Aux antipodes de la littérature antiputtanesca vénitienne : les stanze in lode delle più famose cortigiane di Venegia de Marco Bandarini
No full textEste artículo es la edición crítica de las Stanze in lode delle più famose cortigiane di Venegia de Marco Bandarini, publicado en Venecia en los años 1540, cuyo único ejemplar es parte de la colección de la British Library. Como muestran sus obras, el autor, secuaz menor de Ariosto, es más interesante por entender las modas literarias del tiempo que por su valor poético. Siguiendo el género de las stanze in lode di nobildonne, alaba así a las más famosas cortesanas de Venecia como modelos de virtud y honestidad, lejos de los cánones de la poesía pornográfica de Pietro Aretino o Lorenzo Venier.This article is the critical edition of Marco Bandarini's Stanze in lode delle più famose cortigiane di Venezia, published in Venice in the 1540's, whose only copy is now part of the British Library's collections. As Bandarini's works show, the author, a minor follower of Ariosto, is more interesting to understand the literary trends of the time than for his poetic value. Following the genre of stanze in lode di nobildonne, he praises some of Venice's most reknown courtesans as classical models of virtue and honesty, far from the standards of venetian pornographic poetry set by Pietro Aretino and Lorenzo Venier
A strength criterion for frozen clay considering the influence of stress Lode angle
No full textTo investigate the influence of stress Lode angle on frozen soil, a series of directional shear tests was conducted on artificial frozen clay at three temperatures (–6, –10, and –15 °C) and five stress Lode angles (θσ = –30°, –16.1°, 0°, 16.1°, and 30°) using a hollow cylindrical apparatus. An elliptical function was proposed according to the strength envelope evaluation with the mean principal stress (p) in the p–q plane. In addition, generalized nonlinear strength theory (GNST) was introduced in the π plane to describe the evolution of the strength envelope with increasing mean principal stress. Then a strength criterion for frozen clay in three-dimensional principal stress space was proposed by combining strength functions in the p–q and π planes. The temperature effect was also introduced into the strength criterion. The proposed strength criterion can predict the multi-axial strength characteristics of frozen clay and reveal the influence of the stress Lode angle.The accepted manuscript in pdf format is listed with the files at the bottom of this page. The presentation of the authors' names and (or) special characters in the title of the manuscript may differ slightly between what is listed on this page and what is listed in the pdf file of the accepted manuscript; that in the pdf file of the accepted manuscript is what was submitted by the author
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