Search results for "Computer-assisted"

Factores asociados al estrés prenatal y la ansiedad en gestantes durante el COVID-19 en España

2022

AIM OF THE STUDY To describe prenatal stress and state anxiety levels in pregnant women living in Spain during the lockdown of the first wave of COVID-19 and its relation with obstetric factors, perception of health care, and concerns about the socio-sanitary situation. METHODS The present study is an observational, correlational, and cross-sectional quantitative study. The participants in the study were pregnant women recruited through non-probabilistic convenience and snowball sampling during the lockdown. A web link was provided to an online questionnaire designed for this research, which collected socio-demographic and obstetric variables, perceptions of health care received during the …

Three-dimensional ultrasonography in prenatal diagnosis

1995

Within the past five years, 3D ultrasonography has developed to the degree that it offers both the patient and the examiner an entirely new visual experience in prenatal diagnosis. With the system described here (Kretz-technik, Austria), any desired plane can be displayed within the stored volume, and within seconds a high-quality 3D surface or transparent image can be calculated and displayed on the ultrasound monitor without need for an external workstation. All of this can be performed routinely in the clinical setting. Since 1989 we have routinely examined a total of 458 fetuses (242 normal and 216 with anomalies) between 16 and 38 weeks of gestation, supplementing our conventional 2D u…

Response to computer-assisted intervention in children most at risk for mathematics difficulties

2015

Evidence of an association between poor early number skills and a high risk for later difficulties in mathematics manifests a need for both early identification of risk and effective prevention of difficulties. However, only a few theory-based assessment and progress monitoring tools, and intervention methods are avail able for this purpose in Finnish pre-primary education. This thesis aimed to examine to what extent a theory-based computer-assisted intervention method (GraphoGame Math, GGM) can support early number skills development in children (6௅7-year-olds) most at risk for mathematics difficulties (MD; defined as performance below the 10th percentile). The specific aims were threefold…

Shift-Invariant Canonical Polyadic Decomposition of Complex-Valued Multi-Subject fMRI Data with a Phase Sparsity Constraint

2020

Canonical polyadic decomposition (CPD) of multi-subject complex-valued fMRI data can be used to provide spatially and temporally shared components among groups with both magnitude and phase information. However, the CPD model is not well formulated due to the large subject variability in the spatial and temporal modalities, as well as the high noise level in complex-valued fMRI data. Considering that the shift-invariant CPD can model temporal variability across subjects, we propose to further impose a phase sparsity constraint on the shared spatial maps to denoise the complex-valued components and to model the inter-subject spatial variability as well. More precisely, subject-specific time …

Computer-assisted cognitive remediation for Parkinson’s disease

2012

Evaluation of the primary stability in dental implants placed in low density bone with a new drilling technique, osseodensification: an in vitro study

2020

Background Primary stability is an important key determinant of implant osseointegration. We investigated approaches to improve primary implant stability using a new drilling technique termed osseodensification (OD), which was compared with the conventional under-drilling (UD) method utilized for low-density bones. Material and Methods We placed 55 conical internal connection implants in each group, in 30 low-density sections of pig tibia. The implants were placed using twist drill bits in both groups; groups Under Drilling (UD) and Osseodensification (OD) included bone sections subjected to conventional UD and OD drilling, respectively. Before placing the implants, we randomized the bone s…

The use of technological devices in English teaching as experienced by teachers

2017

Teknologiaa on käytetty osana opetusta jo vuosikymmenten ajan. Tekniikan kehitys ja saatavuus ovat kuitenkin muuttuneet laajalti vuosien aikana. Nykyään sekä koulun tarjoamat, että oppilaiden omat laitteet ovat vahvasti läsnä kielten opetuksessa. Laitteiden kirjo on moninaistunut uusien laitteiden myötä. Luokassa saattaa olla hyvin laaja kirjo erilaisia laitteita, joita opettaja voi hyödyntää osana opetustaan. Tutkimuksen tarkoituksena on selvittää tämän hetkistä tilannetta englannin opetuksessa yläkoulussa ja lukiossa. Tutkimus kartoittaa, minkälaisia laitteita opetuksessa käytetään, ja miksi. Lisäksi pyritään selvittämään millaisia hyötyjä ja haittoja teknologian käytöstä on vieraiden kie…

Direct Measurement of Mammographic X-Ray Spectra with a Digital CdTe Detection System

2012

In this work we present a detection system, based on a CdTe detector and an innovative digital pulse processing (DPP) system, for high-rate X-ray spectroscopy in mammography (1–30 keV). The DPP system performs a height and shape analysis of the detector pulses, sampled and digitized by a 14-bit, 100 MHz ADC. We show the results of the characterization of the detection system both at low and high photon counting rates by using monoenergetic X-ray sources and a nonclinical X-ray tube. The detection system exhibits excellent performance up to 830 kcps with an energy resolution of 4.5% FWHM at 22.1 keV. Direct measurements of clinical molybdenum X-ray spectra were carried out by using a pinhole…

Bienestar Docente durante la Pandemia COVID-19 : La Comparación entre Ecuador y Chile

2021

El quehacer docente se ha visto  afectado a causa de la crisis sanitaria a nivel mundial, los docentes han debido transformar la forma de hacer su trabajo y enfrentar nuevos  desafíos profesionales. El objetivo de este estudio es identificar y comparar entre docentes chilenos y ecuatorianos percepciones de bienestar emocional, social y laboral durante la pandemia; también identificar diferencias por género y la relación  entre el nivel de bienestar y diferentes dimensiones socioemocionales. Participaron 881 docentes de preescolar, primaria y secundaria de ambos países, quienes respondieron un cuestionario en línea sobre carga laboral/doméstica, horario laboral, apoyo institucional, afectos …

Directionlets: Anisotropic Multidirectional representation with separable filtering

2006

In spite of the success of the standard wavelet transform (WT) in image processing in recent years, the efficiency of its representation is limited by the spatial isotropy of its basis functions built in the horizontal and vertical directions. One-dimensional (1-D) discontinuities in images (edges and contours) that are very important elements in visual perception, intersect too many wavelet basis functions and lead to a nonsparse representation. To efficiently capture these anisotropic geometrical structures characterized by many more than the horizontal and vertical directions, a more complex multidirectional (M-DIR) and anisotropic transform is required. We present a new lattice-based pe…