Results 11 to 20 of about 1,662,855 (280)

A PRELIMINARY STUDY OF SENTIMENT ANALYSIS ON COVID-19 NEWS: LESSON LEARNED FROM DATA ACQUISITION, PRE-PROCESSING, AND DESCRIPTIVE ANALYTICS

open access: yesBarekeng, 2023
Sentiment analysis is a method used to analyze opinions and feelings. The goal of sentiment analysis is to determine whether a document contains a positive or negative emotion.
Rahmatin Nur Amalia   +2 more
doaj   +1 more source

Adequate Placental Sampling for the Diagnosis and Characterization of Placental Infection by Zika Virus

open access: yesFrontiers in Microbiology, 2020
The detection of Zika virus (ZIKV) in immunoprivileged anatomical sites, potential sites for viral persistence, may guide the confirmation of undefined cases of ZIKV infection and also bring to light unknown pathways of viral transmission.
Emanuella Meneses Venceslau   +39 more
doaj   +1 more source

Determination of Sample Size and Observation Units

open access: yesInternational Journal of Assessment Tools in Education, 2019
The purpose of this study was to write programsto define sampling sizes and observation units by probability sampling methodsand to provide an idea for software developers. Thealgorithms of the programs were written in Python 3.
Tülin Acar
doaj   +1 more source

Interference and k-point sampling in the supercell approach to phase-coherent transport [PDF]

open access: yes, 2005
We present a systematic study of interference and k-point sampling effects in the supercell approach to phase-coherent electron transport. We use a representative tight-binding model to show that interference between the repeated images is a small effect
Jacobsen, K. W., Thygesen, K. S.
core   +2 more sources

EVALUATION OF BONE-TO-IMPLANT CONTACT AND BONE DENSITY ADJACENT TO TITANIUM IMPLANTS USING A STEREOLOGICAL TECHNIQUE ON GROUND SECTIONS

open access: yesImage Analysis and Stereology, 2011
When bone implants have to be examined in situ ground sections are required. Histomorphometric measurements are usually performed on two-dimensional sections, causing biased results when they are wrongly extrapolated to 3D without any knowledge of ...
Dimitra Balatsouka   +2 more
doaj   +1 more source

Tracking the Recovery of Freshwater Mussel Diversity in Ontario Rivers: Evaluation of a Quadrat-Based Monitoring Protocol

open access: yesDiversity, 2017
Watershed inventories and population monitoring are essential components of efforts to conserve and recover freshwater mussel diversity in Canada. We used two datasets to assess the efficacy of a quadrat-based sampling protocol for: (1) detecting mussel ...
Scott M. Reid, Todd J. Morris
doaj   +1 more source

Propositions for Confidence Interval in Systematic Sampling on Real Line

open access: yesEntropy, 2016
Systematic sampling is used as a method to get the quantitative results from tissues and radiological images. Systematic sampling on a real line ( R ) is a very attractive method within which biomedical imaging is consulted by practitioners.
Mehmet Niyazi Çankaya
doaj   +1 more source

LÉVY-BASED ERROR PREDICTION IN CIRCULAR SYSTEMATIC SAMPLING

open access: yesImage Analysis and Stereology, 2013
In the present paper, Lévy-based error prediction in circular systematic sampling is developed. A model-based statistical setting as in Hobolth and Jensen (2002) is used, but the assumption that the measurement function is Gaussian is relaxed.
Kristjana Ýr Jónsdóttir   +1 more
doaj   +1 more source

Factors influencing the adoption of conservation agriculture by smallholder farmers in KwaZulu-Natal, South Africa

open access: yesOpen Agriculture, 2022
The various efforts done to promote conservation agriculture (CA) in the Sub-Saharan Africa and the Republic of South Africa have diminished over time.
Nkonki-Mandleni Busisiwe   +2 more
doaj   +1 more source

CONDITIONS FOR EXACT CAVALIERI ESTIMATION

open access: yesImage Analysis and Stereology, 2014
Exact Cavalieri estimation amounts to zero variance estimation of an integral with systematic observations along a sampling axis. A sufficient condition is given, both in the continuous and the discrete cases, for exact Cavalieri sampling.
Mónica Tinajero-Bravo   +2 more
doaj   +1 more source

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