scholarly journals Structural evaluation for the core sampling trucks, RMCS operations, 200 Area

1996 ◽  
Author(s):  
M.A. Islam
Keyword(s):  
The Core ◽  
Core Sampling ◽  
Structural Evaluation

scholarly journals Quantifying Soil Compaction in Persimmon Orchards Using ISUM (Improved Stock Unearthing Method) and Core Sampling Methods

Agriculture ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 266 ◽  
Author(s):  
Ehsan Moradi ◽  
Jesús Rodrigo-Comino ◽  
Enric Terol ◽  
Gaspar Mora-Navarro ◽  
Alexandre Marco da Silva ◽  
...  
Keyword(s):  
Ecosystem Services ◽  
Soil Erosion ◽  
Bulk Density ◽  
Soil Compaction ◽  
Structural Changes ◽  
Low Cost ◽  
Positive Contribution ◽  
The Core ◽  
Core Sampling ◽  
Core Method

Agricultural activities induce micro-topographical changes, soil compaction and structural changes due to soil cultivation, which directly affect ecosystem services. However, little is known about how these soil structural changes occur during and after the planting of orchards, and which key factors and processes play a major role in soil compaction due to cultivation works. This study evaluates the improved stock unearthing method (ISUM) as a low-cost and precise alternative to the tedious and costly traditional core sampling method, to characterize the changes in soil compaction in a representative persimmon orchard in Eastern Spain. To achieve this goal, firstly, in the field, undisturbed soil samples using metallic core rings (in January 2016 and 2019) were collected at different soil depths between 45 paired-trees, and topographic variations were determined following the protocol established by ISUM (January 2019). Our results show that soil bulk density (Bd) increases with depth and in the inter-row area, due to the effect of tractor passes and human trampling. The bulk density values of the top surface layers (0–12 cm) showed the lowest soil accumulation, but the highest temporal and spatial variability. Soil consolidation within three years after planting as calculated using the core samples was 12 mm, whereas when calculated with ISUM, it was 14 mm. The quality of the results with ISUM was better than with the traditional core method, due to the higher amount of sampling points. The ISUM is a promising method to measure soil compaction, but it is restricted to the land where soil erosion does not take place, or where soil erosion is measured to establish a balance of soil redistribution. Another positive contribution of ISUM is that it requires 24 h of technician work to acquire the data, whereas the core method requires 272 h. Our research is the first approach to use ISUM to quantify soil compaction and will contribute to applying innovative and low-cost monitoring methods to agricultural land and conserving ecosystem services.

scholarly journals Sampling techniques for isolating trunk disease fungi from a Nelson vineyard

2009 ◽  
Vol 62 ◽  
pp. 406-406
Author(s):  
D.C. Mundy ◽  
S.G. Casonato ◽  
M.A. Manning
Keyword(s):  
Sample Size ◽  
Sampling Method ◽  
Sampling Technique ◽  
Sampling Techniques ◽  
Sample Collection ◽  
Fungal Population ◽  
Heterogeneous Distribution ◽  
The Core ◽  
Core Sampling ◽  
Non Destructive

A trial was conducted of two different sampling techniques (destructive and a non destructive) undertaken at three different times to ascertain the fungal population associated with trunks of grapevines A Nelson vineyard was surveyed in October 2007 using a coring method on 5 vines and 105 vines were subsequently sampled in July and October 2008 using a crosssection sampling method Botryosphaeria Cylindrocarpon Eutypa and Phomopsis were isolated on all occasions regardless of method The detection of other fungi varied with sampling technique and time taken Differences in isolations between methods and timings of sample collection reflect the heterogeneous distribution of the fungi within the trunks of old vines The core sampling technique was sufficient to determine fungi associated with symptomatic and asymptomatic vines The more destructive technique where crosssection samples were taken gave similar results but required more resources If isolations are to be collected from vines then the method timing and sample size need to be considered and standardised

scholarly journals 10Be in the Akademii Nauk ice core – first results for CE 1590–1950 and implications for future chronology validation

2017 ◽  
Vol 63 (239) ◽  
pp. 514-522 ◽  
Author(s):  
LUISA VON ALBEDYLL ◽  
THOMAS OPEL ◽  
DIEDRICH FRITZSCHE ◽  
SILKE MERCHEL ◽  
THOMAS LAEPPLE ◽  
...  
Keyword(s):  
Ice Core ◽  
Ice Cores ◽  
Sampling Strategy ◽  
Temporal Variations ◽  
Russian Arctic ◽  
The Core ◽  
Core Sampling ◽  
Local Fluctuations ◽  
First Results ◽  
Age Model

ABSTRACTTemporal variations of the radionuclide 10Be are broadly synchronous across the globe and thus provide a powerful tool to synchronize ice core chronologies from different locations. We compared the 10Be record of the Akademii Nauk (AN) ice core (Russian Arctic) for the time period CE 1590–1950 to the 10Be records of two well-dated Greenland ice cores (Dye3 and NGRIP). A high correlation (r = 0.59) was found between the AN and Dye3 records whereas the correlation with NGRIP was distinctly lower (r = 0.45). Sources of deviations may include local fluctuations in the deposition of 10Be due to changes in the precipitation patterns, and artefacts due to the core-sampling strategy. In general, the existing age model was validated, confirming the AN ice core to be a unique and well-dated source of palaeoclimate parameters for the Russian Arctic. We further used numerical simulations to test the influence of the core-sampling strategy on the results and derived an optimized sampling strategy for the deeper parts of the ice core.

Experimental Research on Elastic Modulus and Compressive Strength of High-Strength Concrete after Fire

2013 ◽  
Vol 663 ◽  
pp. 144-148
Author(s):  
Xin Lei Shi ◽  
Yong Ding ◽  
Zhi Kun Yao ◽  
Li Ping Zhou
Keyword(s):  
Elastic Modulus ◽  
High Strength Concrete ◽  
Sampling Method ◽  
High Strength ◽  
Bottom Surface ◽  
Test Results ◽  
Strength Concrete ◽  
The Core ◽  
Core Sampling ◽  
In Fire

The bottom surface of the bridge beam, which is made of C50 high-strength concrete, is heated to 800°C in fire-resistant experiment. Then the elastic modulus and strength of the concrete are measured by the rebound method and core sampling method, and the test results are used to validate the theoretical methods. The study shows that the strength and elastic modulus of concrete decrease with the increasing of temperature. The strength from the current theoretical analysis agrees well with that from the experiment. But for the elastic modulus, there is a great difference between the theoretical and experimental analysis. The strength of the concrete after fire gotten from the rebound method has a bigger error than that from the core sampling method, so that the core sampling method should be used in preference.

scholarly journals Theoretical and experimental analysis of the core sampling method: Reducing diffusional losses in aerosol sampling line

2019 ◽  
Vol 53 (7) ◽  
pp. 793-801 ◽  
Author(s):  
Yueyun Fu ◽  
Mo Xue ◽  
Runlong Cai ◽  
Juha Kangasluoma ◽  
Jingkun Jiang
Keyword(s):  
Experimental Analysis ◽  
Sampling Method ◽  
Aerosol Sampling ◽  
The Core ◽  
Core Sampling ◽  
Sampling Line

What face familiarity feelings say about the lateralization of specific entities within the core system

2019 ◽  
Vol 42 ◽  
Author(s):  
Guido Gainotti
Keyword(s):  
Temporal Lobe ◽  
Memory System ◽  
Core System ◽  
The Core ◽  
Memory Traces ◽  
Specific Memory ◽  
Target Article ◽  
Temporal Structures ◽  
The Right

Abstract The target article carefully describes the memory system, centered on the temporal lobe that builds specific memory traces. It does not, however, mention the laterality effects that exist within this system. This commentary briefly surveys evidence showing that clear asymmetries exist within the temporal lobe structures subserving the core system and that the right temporal structures mainly underpin face familiarity feelings.

A scanning electron microscopic study on dissolving process of cholesterol gallstones by chenodeoxycholic acid (CDCA)

1978 ◽  
Vol 36 (2) ◽  
pp. 522-523
Author(s):  
T. Kanetaka ◽  
M. Cho ◽  
S. Kawamura ◽  
T. Sado ◽  
K. Hara
Keyword(s):  
Electron Microscope ◽  
Chenodeoxycholic Acid ◽  
Outer Surface ◽  
Electron Microscopic ◽  
Cholesterol Gallstones ◽  
The Core ◽  
Scanning Electron Microscopic Study ◽  
Scanning Electron Microscopic ◽  
Acceleration Voltage ◽  
Scanning Electron

The authors have investigated the dissolution process of human cholesterol gallstones using a scanning electron microscope(SEM). This study was carried out by comparing control gallstones incubated in beagle bile with gallstones obtained from patients who were treated with chenodeoxycholic acid(CDCA).The cholesterol gallstones for this study were obtained from 14 patients. Three control patients were treated without CDCA and eleven patients were treated with CDCA 300-600 mg/day for periods ranging from four to twenty five months. It was confirmed through chemical analysis that these gallstones contained more than 80% cholesterol in both the outer surface and the core.The specimen were obtained from the outer surface and the core of the gallstones. Each specimen was attached to alminum sheet and coated with carbon to 100Å thickness. The SEM observation was made by Hitachi S-550 with 20 kV acceleration voltage and with 60-20, 000X magnification.

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