Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 22 for “"sampling device"”.
-
Electronic automation of a remotely deployable seawater sampling device
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1992.
-
The mechanical and algorithmic design of in-field robotic leaf sampling device
… the yield of crops. The traditional way for leaf sampling is manual, and researchers need to go to the field and use paper hole punchers with a catch-tube to collect leaf samples. The temperature in summer is hot, and some crop like corn is difficult for researchers to walk through, therefore the …
-
A novel cough aerosol sampling device for sputum-scarce individuals with tuberculosis
… producing this sample. A cough aerosol sampling system (CASS) can collect aerosol droplet samples for testing when sputum sampling is not possible. These systems rely on inertial impaction whereby particles are sorted based on their diameter. Thus, CASS also offers information regarding …
-
From Prototype to Production: Product Development of a Modular Automated Milk Sampling Device for Conventional Dairy Farms
Milk sampling and testing is critical in the dairy industry as it provides farmers information to make accurate decisions about nutrition or medication on their cattle. Currently, the milk sampling process is both costly and labor intensive. Therefore, an automated milk sampler is developed to …
-
A comparison of the bacteria at Bakoven Bay and Hottentotshuisie as indicators of marine pollution from a sewage outfall
… by means of a handheld all-glass bacteriological sampling device. Sea-water samples were analysed for a total coliform count, presumptive E. coli type I and a total bacterial count on a marine agar medium. A proportion of the isolates on the total count plates were subjected to a number of …
-
Estimating Chronic Exposure to Steroid Hormones in Water
… risk. So, the continued advancement of sampling methodology is essential to better understanding chemical exposure. While traditional sampling methodologies, including grab sampling, only capture a snapshot of exposure, the development of passive sampling devices (PSDs) has allowed for …
-
Economical sampling of parametric signals
… noise. Our simple acquisition circuitry and low sampling rate enable accurate parameter estimation to be achieved economically. In present practice, sampling and estimation are not integrated: the sampling device does not take advantage of the parametric model, and the estimation assumes that …
-
The activity and functioning of the hypothalamic-pituitary-adrenal axis of the red deer stag (cervus elaphus)
… of blood collection, a portable remote blood sampling device (“DracPac”) was developed and tested. Stags were blood sampled remotely during restraint in a mechanical crush and subsequent recovery at pasture. Cortisol, haematocrit, glucose and lactate levels were elevated during restraint and …
-
Optimal and Permissible Sampling Rates for First-Order Sampling of Two-Band Signals
Sampling theory plays an essential role in the advancement of digital signal processing (DSP). All known DSP processors only work with digital samples of an analog signal (continuous-time signal). Therefore, reliable sampling of a signal is crucial for the successive phases of DSP. A well-known …
-
Paper Spray - Mass Spectrometry: Investigation of Sampling Devices for Illicit Drug Detection and Quantification
… samples at trace levels. In this work, different sampling devices for PS-MS were investigated to improve the assay’s simplicity and sensitivity over traditional approaches. In particular, chapter two characterizes an alternate paper substrate to enhance drug detection on surfaces like asphalt, …
-
Aerosol Samplers Comparison: IOM Dual Sampler (Inhalable & Respirable) vs Conventional Methods for Assessing Welders Exposure to Manganese
… portions of airborne particles by using only one sampling device. For this study, the IOM dual fraction sampler was compared with OSHA method ID-125G for determining occupational exposure to airborne Mn contaminant during Shielded Metal Arc Welding (SMAW), which was performed in a barge at a …
-
Pneumatic Particulate Collection System Analysis and Design
… Areas of recirculation within the collection device as well as impingement of the sampling surface were observed through the testing and CFD analysis. The basis of the improved collection system was conceived through research of pneumatic transport and the deficiencies found through testing …
-
Field sampling and microcolumn preconcentration techniques in inductively coupled plasma spectrometry.
… alumina microcolumns are utilised as a new field sampling tools. Samples are collected in the field and processed through the alumina microcolumns for the effective retention of desired analytes. Hence, an alumina microcolumn sampling stage to effect concentration and isolation prior to analytical …
-
Dry preservation of heavy metal contaminants using cation exchange resins for improved water quality monitoring
… The technology includes a dry preservation device incorporating a sorbent, which collects and preserves contaminants from a water sample in a format that is easily transported or shippable. When the device arrives at a centralized lab, the contaminants can be removed from the device using a …
-
Population dynamics of overwintering life stages of the alfalfa weevil, Hypera postica (Gyllenhal)
… during their fall migration. A newly designed sampling device which removes all plant material, litter, and approximately 2 cm of soil from a 1/20 m² area, was used to measure absolute densities during fall and winter. Based on these absolute density samples fewer adults overwintered within …
-
A New Spatially-Resolved Method to Sample Biofilms from Drinking Water Fountains
… a co-located pair. To test these hypotheses, a sampling projector has been designed to precisely delineate the sampling areas and regions. Seven different buildings with consistent fountain designs were taken as sampling sites. After collecting the water fountain surface samples, we performed …
-
Assessment of road pollutants in roadside retention ponds.
… effect concentration (PNEC). A low-cost 24-hour sampling device, which minimised the usage of plastic and water volume to be transported, was developed to simultaneously isolate particles in-situ and collect water samples for additive chemical analysis. TRWPs, paint fragments and additive …
-
Bioavailability of organic contaminants in sediments.
… affinity for particles and for traditional sampling (filtration and centrifugation) equipment. An equilibrium passive sampling device made of silicone rubber was developed in this research to measure the freely dissolved concentrations of lipophilic contaminants and other parameters (water …
-
Cervical cancer studies on prevention and treatment
… the median follow-up (p<0.0001).The vaginal self-sampling device that we validated showed good agreement with HPV analysis of liquid-based cytology (LBC) (kappa value 0.67 95% CI 0.53-0.81). When 1000 women who had not taken a cytology sample for over nine years were offered self-sampling at home, …
-
Design and Testing of a Hadal Sediment Sampling System
… design and fabricate a prototype sediment core sampling device. We designed an entirely mechanical sampler because underwater actuators suitable for use in hadal conditions are difficult to source and require additional communication and power resources. Furthermore, our device aims to preserve …
Page 1 of 2