نتایج جستجو برای: Sampling Stations

تعداد نتایج: 243372  

2003
GLEN A. SARGEANT DOUGLAS H. JOHNSON

Scent stations usually are deployed in clusters to expedite data collection and increase the number of stations that can be operated for a given cost. Presumed benefits of cluster sampling may not be realized, however, unless cluster sizes are chosen with respect to sampling variation within and among clusters. To encourage and facilitate the use of efficient designs and reporting standards, we...

2014
Leslie E Quint Douglas Arenberg Rishindra M Reddy Jules Lin

Introduction • Summarize the lung cancer staging system. • Show regional lymph node stations using diagrams and CT/PET images. • Explain the need for tissue sampling in order to establish the highest stage and direct appropriate therapy. Sampling techniques with illustrations and imaging examples of accessible lymph nodes: • Mediastinoscopy: Gold standard; outpatient surgical technique; optimal...

Journal: :Acta medico-historica adriatica : AMHA 2009
Andrew D Cliff Matthew R Smallman-Raynor Peta M Stevens

After the establishment of the first quarantine station in the Republic of Ragusa (modern-day Dubrovnik) in 1377, the states and principalities of Italy developed a sophisticated system of defensive quarantine in an attempt to protect themselves from the ravages of plague. Using largely unknown and unseen historical maps, this paper reconstructs the extent and operation of the system used. It i...

2015

Assessment of water quality was conducted from June to December, 2011 in five stations along the stretch of the Benin River between Ajimele and Koko town in attempt to assess and determine the source of anthropogenic activities affecting the river. Twentyfour parameters have been monitored on 5 sampling stations on a monthly-day-trip. Inter station comparisons and locations of significant diffe...

1996
SAMUEL S. SHEN

This paper describes a method that minimizes the mean squared error (MSE) in estimating the spherical harmonic components of the surface air temperature field. The ratio of the MSE to the variance of the spherical harmonic component is expressed in terms of the length scale Xo, and the positions and weights of the measurement stations. The weights are optimized by the condition of minimizing th...

Journal: :Revista brasileira de biologia 1999
M C Pérez S Bonilla G Martínez

This paper deals with the analysis of phytoplankton composition and abundance from four sampling stations at the polymictic system, Rinc6n del Bonete water reservoir in Uruguay. Sampling data were obtained in 4 seasonal periods between February and November 1993. A hundred and twenty-four taxa were identified, where Aulacoseira granulata (Ehrenb.) Simon., A. granulata var. angustissima (Muller)...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی اصفهان - دانشکده ریاضی 1390

the main objective in sampling is to select a sample from a population in order to estimate some unknown population parameter, usually a total or a mean of some interesting variable. a simple way to take a sample of size n is to let all the possible samples have the same probability of being selected. this is called simple random sampling and then all units have the same probability of being ch...

Journal: :Revue scientifique et technique 2011
J Watson P Daniels P Kirkland A Carroll M Jeggo

In August 2007 Australia experienced its first outbreak of equine influenza. The disease occurred first in a quarantine station for imported horses near Sydney and subsequently escaped into the general horse population. After an extensive campaign the disease was eradicated and Australia is again recognised as free of this disease. Equine influenza was then, and is now, recognised to be the maj...

2017
Ulf Båmstedt Sonia Brugel

Ongoing marine monitoring programs are seldom designed to detect changes in the environment between different years, mainly due to the high number of samples required for a sufficient statistical precision. We here show that pooling over time (time integration) of seasonal measurements provides an efficient method of reducing variability, thereby improving the precision and power in detecting i...

2001
John F. Karinen Malin M. Babcock Donald W. Brown William D. MacLeod L. Scott Ramos Jeffrey W. Short

uses the NOAA Technical Memorandum series to issue informal scientific and technical publications when complete formal review and editorial processing are not appropriate or feasible. Documents within this series reflect sound professional work and may be referenced in the formal scientific and technical literature. Notice to Users of this Document This document is being made available in .PDF ...

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