Results 31 to 40 of about 646,279 (275)

Sampling procedures for inventory of commercial volume tree species in Amazon Forest

Anais da Academia Brasileira de Ciências
The spatial distribution of tropical tree species can affect the consistency of the estimators in commercial forest inventories, therefore, appropriate sampling procedures are required to survey species with different spatial patterns in the Amazon ...
SYLVIO P. NETTO, ALLAN L. PELISSARI, VINICIUS C. CYSNEIROS, MARCELO BONAZZA, CARLOS R. SANQUETTA   +4 more
doaj   +1 more source

On Combining Ratio and Product Type Estimators For Estimation of Finite Population Mean In Adaptive Cluster Sampling Design

Brazilian Journal of Biometrics
This article introduces a novel class of estimators and several new novel member estimators, combining the ratio and product forms, within the framework of Adaptive Cluster Sampling (ACS) design for estimating finite population mean.
Rohan Mishra, Rajesh Singh, Yaspal Singh Raghav   +2 more
semanticscholar   +1 more source

Enhanced Ratio-Type Estimators in Adaptive Cluster Sampling Using Jackknife Method

Mathematics
Adaptive cluster sampling is a methodology designed for data collection in contexts where the population is rare and spatially clustered. This approach has been effectively applied in various disciplines, including epidemiology and resource management ...
Supawadee Wichitchan, Athipakon Nathomthong, Pannarat Guayjarernpanishk, Nipaporn Chutiman   +3 more
doaj   +1 more source

Fujian cypress and two other threatened tree species in three conservation zones of a nature reserve in north-western Vietnam

Forest Ecosystems, 2017
Background Fujian cypress (Fokienia hodginsii) is a highly valued but endangered tree species. The Ta Xua Nature Reserve in Vietnam is one of its main conservation centers.
Thi Hoa Hong Dao, Dirk Hölscher
doaj   +1 more source

The Implementation of Accelerated Learning Model Assisted By Autograph on Students' Adaptive Reasoning Ability and Environmental Literacy

Online Learning in Educational Research, 2023
This research aimed to assess the impact of implementing the Accelerated Learning model on the adaptive reasoning ability and environmental literacy of students.
Izzatul Amirah, Bambang Sri Anggoro, Wawan Gunawan   +2 more
doaj   +1 more source

Predicting Chronicity in Children and Adolescents With Newly Diagnosed Immune Thrombocytopenia at the Timepoint of Diagnosis Using Machine Learning‐Based Approaches

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Objectives To identify predictors of chronic ITP (cITP) and to develop a model based on several machine learning (ML) methods to estimate the individual risk of chronicity at the timepoint of diagnosis. Methods We analyzed a longitudinal cohort of 944 children enrolled in the Intercontinental Cooperative immune thrombocytopenia (ITP) Study ...
Severin Kasser, Alice Bizeul, Meera Chitlur, Hugo Donato, Jelena Roganovic, Julia E. Vogt, Thomas Kühne   +6 more
wiley   +1 more source

A Refined Regression Estimator for General Inverse Adaptive Cluster Sampling

Mathematics
Adaptive cluster sampling (ACS) is a sampling technique commonly used for rare populations that exhibit spatial clustering. However, the initially selected sample units may not always satisfy the specified inclusion condition.
Nipaporn Chutiman, Supawadee Wichitchan, Chawalit Boonpok, Monchaya Chiangpradit, Pannarat Guayjarernpanishk   +4 more
doaj   +1 more source

The GeMS/GSAOI Galactic Globular Cluster Survey (G4CS). II. Characterization of 47 Tuc with Bayesian Statistics

The Astrophysical Journal, 2023
We present a photometric analysis of globular cluster 47 Tuc (NGC 104) using near-IR imaging data from the GeMS/GSAOI Galactic Globular Cluster Survey (G4CS), which is in operation at Gemini-South telescope.
Mirko Simunovic, Thomas H. Puzia, Bryan Miller, Eleazar R. Carrasco, Aaron Dotter, Santi Cassisi, Stephanie Monty, Peter Stetson   +7 more
doaj   +1 more source

Revealing the structure of land plant photosystem II: the journey from negative‐stain EM to cryo‐EM

FEBS Letters, EarlyView.
Advances in cryo‐EM have revealed the detailed structure of Photosystem II, a key protein complex driving photosynthesis. This review traces the journey from early low‐resolution images to high‐resolution models, highlighting how these discoveries deepen our understanding of light harvesting and energy conversion in plants.
Roman Kouřil
wiley   +1 more source

Finding rare and patched type population variance via systematic analysis using adaptive cluster sampling

Alexandria Engineering Journal
To address uncommon and endangered species of infectious diseases, valuable plants, minerals, and natural resources, as well as patched populations that are available in the form of clusters, we propose a unique generalized variance estimator for finite ...
Khudhayr A. Rashedi, Tariq S. Alshammari
doaj   +1 more source