منابع مشابه
Sampling in cylindrical 2D PET
In this paper, we study 2D cylindrical Positron Emission Tomography (2D PET) sampling. We show that rectangular sampling schemes are more efficient than usual square schemes. 1. PET and sampling 1.1 PET The aim of Positron Emission Tomography (PET) is to map the internal nuclear activity of a patient from exterior measurement. Usually, the patient received some nuclear substance by inhalation o...
متن کاملEfficiency of colored modified box traps for sampling of tabanids
The efficiency of ten differently colored modified box traps for collecting tabanids was studied in the Monjoroš Forest in eastern Croatia. A total of 5,436 specimens belonging to 16 species of tabanids grouped into six genera were collected. The genus Tabanus was the most represented with 98% of all collected tabanids. Tabanus bromius comprised 90% of tabanids collected, and was the most abund...
متن کاملEvaluation of Common Methods for Sampling Invertebrate Pollinator Assemblages: Net Sampling Out-Perform Pan Traps
Methods for sampling ecological assemblages strive to be efficient, repeatable, and representative. Unknowingly, common methods may be limited in terms of revealing species function and so of less value for comparative studies. The global decline in pollination services has stimulated surveys of flower-visiting invertebrates, using pan traps and net sampling. We explore the relative merits of t...
متن کاملPoiseuille and Thermal-Creep Flowin a Cylindrical Tube
A version of the discrete-ordinates method is used to solve, for the case of flow in a cylindrical tube, the classical Poiseuille and thermal-creep problems based on the Bhatnagar, Gross, and Krook model in the theory of rarefied-gas dynamics. In addition to the development of a discrete-ordinates solution that is valid for a wide range of the Knudsen number, the solution is evaluated numerical...
متن کاملSampling Saproxylic Beetles with Window Flight Traps: Methodological Insights
RÉSUMÉ. — Regards méthodologiques sur l’échantillonnage des coléoptères saproxyliques au moyen des pièges-vitres. — Les coléoptères saproxyliques constituent un groupe riche en espèces, souvent petites et cryptiques, et diffi ciles à échantillonner. Différentes méthodes sont traditionnellement utilisées pour les collecter: les techniques (i) de collecte active, (ii) d’élevage et (iii) de piégea...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Limnology and Oceanography
سال: 1991
ISSN: 0024-3590
DOI: 10.4319/lo.1991.36.6.1167