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2011
In the Cananeia region of southeastern Brazil, Spartina alteniflora marshes colonize tidal flats fringing mangrove woodlands displaying a zonation typical of monocultures. The pattern observed can be explained by the combined effects of organism resistance to emersion and physical dependence on the plants as habitat. In this context, it is interesting to quantify the aggregation index for the dominant species associated with the salt marsh. A tool which enables us to do it is Taylor´s power law which combines the mean and the variance distributions of species in a known area. Ten random samples were taken monthly by a 20 cm diameter corer (0.03 m2) at a depth of 10 cm, from the lower and upper marshes, from August, 1988, to January, 1989. The five most representative species of the system were elected for further analysis, and for each of these Taylor´s power law parameters were calculated. Epifaunal species present aggregation indexes approaching randomness. The aggregation indexes...
Riassunto. L'obiettivo del lavoro consiste nel confrontare differenti stimatori della densità di una popolazione animale basati sul campionamento per transetti. L'attenzione è focalizzata sul "point transect" ed il confronto degli stimatori è effettuato sulla base di simulazioni delle distribuzioni associate alle funzioni di avvistamento seminormale ed esponenziale negativa, che rappresentano due situazioni ben distinte. Infatti, la seconda, a differenza della prima, non soddisfa all'usuale condizione di stazionarietà (corrispondente all'annullarsi della derivata nell'origine) ed è caratterizzata da una rapida riduzione della probabilità di avvistamento degli animali all'aumentare della loro distanza dai punti di osservazione. Gli stimatori considerati sono: gli stimatori a varianza uniformemente minima tra i corretti (UMVU) per i due modelli parametrici suddetti; gli stimatori di massima verosimiglianza (ML) per due modelli proposti da Buckland et ...
African Journal of Marine Science
A bootstrap method for estimating bias and variance in statistical fisheries modelling frameworks using highly disparate datasets2014 •
Marine Ecology Progress Series
Macrobenthic species response surfaces along estuarine gradients: prediction by logistic regression2002 •
Model II regression (i.e. minimizing residuals obliquely) is the adequate alternative to Model I regression by Ordinary Least Squares (i.e. minimizing residuals vertically) given the absence of well-established dependence relationships or x measured with error. Yet, it has no perfect solution. Determining the true slope from errors-in-the-variables models requires the errors in x and y estimated from higher order moments. However, their accurate estimation requires enormous data sets and thus they are not applicable to most ecological problems. The alternative Reduced Major Axis (RMA) is dependent on a strict set of assumptions, hardly met with real data, making it prone to bias, whereas Principal Components Analysis (PCA) becomes less reliable with decreasing correlations while x and y presenting approximate variances. We used artificial data (allowing for the determination of the true slope) to demonstrate when RMA or PCA should be preferred. Consequently, we propose using PCA whenever r 2 +s 2 x /s 2 y is higher than 1.5. Otherwise, we suggest generating artificial data manipulated to match the structure of the original, and to test which method provides closer estimates to the input true slope. We provide a user-friendly script to perform this task. We tested the use of RMA and PCA with real data about intraspecific and interspecific biomass-density relations in algae and seagrass, algae frond growth, crustacean and bird morphometry, sardine fisheries and social sciences data, commonly finding widely divergent slope estimates leading to severely biased parameter estimations and model applications. Their analyses support the suggested approach for method selection summarized above.
Jurnal Berdaya Mandiri
Pelatihan Pembuatan Laporan Keuangan Dan Pajak Pada Usaha Mikro Kecil Dan Menengah Secara Daring2021 •
Keberadaan Usaha Mikro Kecil dan Menengah (UMKM) tidak dapat dipandang sebelah mata lagi. Hal ini karena UMKM merupakan sumber perekonomian baru untuk pembangunan di Negara Indonesia. Pelaku UMKM didorong untuk mengembangkan kualitas dan kuantitas produknya. Sehingga, UMKM memerlukan dukungan dari berbagai pihak, misalnya pihak perbankan. Pihak perbankan merupakan pihak yang dapat memberikan dukungan dari sisi modal. Modal merupakan salah satu faktor yang memengaruhi perkembangan UMKM. Namun, guna mengakses modal dari perbankan maka pelaku UMKM diharuskan membuat laporan keuangan. Keberadaan UMKM juga tidak terlepas dari sektor pajak. Beberapa UMKM mungkin tidak sengaja untuk bersikap tidak patuh (enggan) membayarkan pajak, akan tetapi salah satu faktor yang mendorong UMKM tidak membayarkan pajaknya karena kurangnya pengetahuan perpajakan. Sehingga, hal inilah yang mendorong pengabdi untuk melakukan pelatihan pembuatan laporan keuangan dan pajak pada UMKM secara daring. Diharapkan a...
Offshore Technology Conference
Structural Reliability Assessment of Ekofisk Jackets Under Extreme Loading2001 •
Comentarios a las Sentencias de Unificación de Doctrina (Civil y Mercantil)
Carácter privativo de la indemnización por incapacidad permanente absoluta cobrada por un cónyuge durante la vigencia de la sociedad de gananciales en virtud de una póliza colectiva de seguro concertada por la empresa para la que trabajaba2017 •
Physical chemistry chemical physics : PCCP
Complexation of short ds RNA/DNA oligonucleotides with Gemini micelles: a time resolved SAXS and computational study2017 •
SSRN Electronic Journal
Effects of Social Activities on Cognitive Functions: Evidence from CHARLS2012 •
The journal of applied management and entrepreneurship
Strategic Planning for Community-Based Small Nonprofit Organizations: Implementation, Benefits, and Challenges2014 •
HAL (Le Centre pour la Communication Scientifique Directe)
Etude comparée de la fracturation observable sur carottes de forage et obtenue par diagraphie. Application au marbre de Saint-Béat (Haute-Garonne)2010 •
2022 •
Rev. Bras. de Agroecologia/out
Programa Agronomia no Campo: uma avaliação dos quatro anos de existência2007 •
Jurnal Teknologi Informasi dan Ilmu Komputer
Durus Al-Lughah Gontory: Media Pembelajaran Bahasa Arab untuk Pemula Menggunakan Metode Langsung2020 •
2016 •
Proceedings of the 1st Public Health International Conference (PHICo 2016)
An Understanding Demographic Bonus and Its Implication among Teenagers in Deli Serdang District2017 •
2007 •
Journal of Psychosomatic Research
Association between polarity of first episode and solar insolation in bipolar I disorder2017 •