Results 11 to 20 of about 1,608,848 (335)

Statistical Inference for Aggregation of Malmquist Productivity Indices

Operations Research, 2019
A Comprehensive Set of Asymptotic Properties for a Meaningful Aggregation of Malmquist Indices The Malmquist productivity index (MPI) has become one of the most widely used tools for analyzing dynamic performance of decision-making units.
Manh D. Pham, L. Simar, Valentin Zelenyuk   +2 more
semanticscholar   +5 more sources

Aggregating Governance Indicators [PDF]

SSRN Electronic Journal, 1999
In recent years the growing interest of academics and policymakers in governance has been reflected in the proliferation of cross-country indices measuring various aspects of governance. The authors explain how a simple variant of an unobserved components model can be used to combine the information from these different sources into aggregate ...
Kaufmann, Daniel, Kraay, Aart, Zoido-Lobaton, Pablo   +2 more
openaire   +2 more sources

A comprehensive review of water quality indices (WQIs): history, models, attempts and perspectives

Reviews in Environmental Science and Bio\/technology, 2023
Water quality index (WQI) is one of the most used tools to describe water quality. It is based on physical, chemical, and biological factors that are combined into a single value that ranges from 0 to 100 and involves 4 processes: (1) parameter selection,
S. Chidiac, Paula El Najjar, N. Ouaini, Youssef El Rayess, Desiree El Azzi   +4 more
semanticscholar   +1 more source

A review of water quality index models and their use for assessing surface water quality

Ecological Indicators, 2021
The water quality index (WQI) model is a popular tool for evaluating surface water quality. It uses aggregation techniques that allow conversion of extensive water quality data into a single value or index.
Md. Galal Uddin, Stephen Nash, Agnieszka I. Olbert   +2 more
doaj   +1 more source

Decline or shifting distribution? A first regional trend assessment for white sharks (Carcharodon carcharias) in South Africa

Ecological Indicators, 2023
Unprecedented levels of change in ocean ecosystems bring an ever-increasing need for re-analyses of existing data to explore pressing conservation questions. Substantial declines in white shark (Carcharodon carcharias) presence at two primary aggregation
Heather D. Bowlby, Matt L. Dicken, Alison V. Towner, Sarah Waries, Toby Rogers, Alison Kock   +5 more
doaj   +1 more source

Caracterização de agregados em um Latossolo Vermelho distroférrico típico submetido a diferentes doses de vinhaça Evaluation of aggregate stability in an oxisol treated with different vinasse doses

Revista Brasileira de Ciência do Solo, 2007
A distribuição de classes de tamanho, a quantidade e a estabilidade dos agregados constituem importantes critérios para avaliação da estrutura, a qual desempenha papel relevante nas relações entre o solo e as plantas.
Amarildo Luiz Passarin, Edinei Luis Rodrigueiro, Carla Renata Pazzotti Robaina, Cristiane de Conti Medina   +3 more
doaj   +1 more source

Equitably allocating wildfire resilience investments for power grids: The curse of aggregation and vulnerability indices [PDF]

Applied Energy
Social vulnerability indices have increased traction for guiding infrastructure investment decisions to prioritize communities that need these investments most.
Madeleine Pollack, Ryan Piansky, Swati Gupta, A. Kody, Daniel K. Molzahn   +4 more
semanticscholar   +1 more source

Anomaly detection based on indicators aggregation [PDF]

2014 International Joint Conference on Neural Networks (IJCNN), 2014
International Joint Conference on Neural Networks (IJCNN 2014), Beijing : China (2014).
Rabenoro, Tsirizo, Lacaille, Jérôme, Cottrell, Marie, Rossi, Fabrice   +3 more
openaire   +2 more sources

Relações de atributos do solo e estabilidade de agregados em canaviais com e sem vinhaça Soil attributes and soil aggregate stability relationship in sugarcane fields with and without vinasse application

Revista Brasileira de Engenharia Agrícola e Ambiental, 2012
Realizou-se este estudo com o objetivo de se avaliar o efeito da aplicação da vinhaça na estabilidade dos agregados e nos índices de agregação do solo e nas correlações das propriedades físicas do solo em áreas cultivadas com cana-de-açúcar no litoral ...
Thais F. da S. Vicente, Elvira M. R. Pedrosa, Mario M. Rolim, Veronildo S. Oliveira, Ana Karina S. Oliveira, Anailda M. P. L. Souza   +5 more
doaj   +1 more source

Three methods to measure parasite aggregation using examples from Australian fish parasites

Methods in Ecology and Evolution, 2021
The distribution of parasites in host populations is integral to simulations of parasite populations. We compared three methods to measure parasite aggregation, namely the Hoover, coefficient of variation and I10 indices, using field data from a range of
Robert J. G. Lester, Simone Phillipa Blomberg   +1 more
doaj   +1 more source