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

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

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 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.

Towards 'coring' and 'aboutness': an approach to some aspects of in-depth indexing

1982 ◽  
Vol 4 (4) ◽  
pp. 167-170
Author(s):  
Shawky Salem
Keyword(s):  
Experimental Analysis ◽  
The Core ◽  
New Concepts

Some ideas about in-depth indexing are presented. Any document can be considered from two points: the core of the document which is usually one subject expressed by one term and the aboutness of the document which is usually many subjects expressed by several keywords and terms which may be either relative or non-relative to the core term. An experimental analysis with a sample of 100 petroleum documents using these new concepts appears to show that the terms unrelated to the core term must be reduced and the primary and minor relative terms need to be increased. The computing operation of the graduated aboutness is a way to weight the types of aboutness in in-depth indexing.

scholarly journals Student`s Caring Ability at Nursing Faculty of Padjadjaran University

2019 ◽  
Vol 5 (2) ◽  
Author(s):  
Ihsan Kurnia ◽  
Aat Sriati ◽  
Efri Widianti
Keyword(s):  
Nursing Students ◽  
Nursing Faculty ◽  
Sampling Method ◽  
Stratified Sampling ◽  
Descriptive Statistics ◽  
Educational Institutions ◽  
The Core ◽  
Nursing Values ◽  
Quantitative Descriptive ◽  
Development Of Students

 ABSTRAK Caring merupakan inti dari nilai-nilai keperawatan. Caring bagi mahasiswa keperawatan merupakan hal yang penting untuk dipelajari dan dipraktikkan. Sejauh ini, penelitian tentang perkembangan kemampuan caring mahasiswa keperawatan masih kurang. Mahasiswa datang dari lingkungan keluarga, sosial, budaya, etnik dan latar belakang ekonomi yang berbeda. Sehingga perkembangan kemampuan caring mahasiswa perlu diperhatikan oleh institusi pendidikan. Tujuan dari penelitian ini adalah untuk mengetahui gambaran kemampuan caring mahasiswa Fakultas Keperawatan Universitas Padjadjaran. Penelitian deskriptif kuantitatif ini menggunakan metode proportional stratified sampling. Total sampel terpilih sebanyak 240 mahasiswa. Instrumen yang digunakan adalah Caring Ability Inventory dan dianalisis menggunakan statistik deskriptif. Hasil penelitian di dapatkan bahwa setengah dari mahasiswa memiliki kemampuan caring pada kategori rendah (50%), kurang dari setengah mahasiswa pada kategori sedang (42,5%) dan sebagian kecil mahasiswa pada kategori tinggi (7,5%). Dapat disimpulkan bahwa kemampuan caring mahasiswa sebagian besar adalah kategori rendah dan sedang. Fakultas Keperawatan Universitas Padjadjaran perlu meningkatkan perhatian terhadap perkembangan kemampuan caring mahasiswa. ABSTRACTCaring is the core of nursing values. Caring for nursing students is an important element to learn and practice. There was limited research on the development of caring ability of nursing students. Students came from different familial, social, cultural, ethnic and economic backgrounds. The development of students caring ability needs to be considered by educational institutions. The aim of this research was to describe nursing students’ caring ability at Faculty of Nursing, Padjadjaran University. This quantitative descriptive study used proportional stratified sampling method. In total240 students were selected as samples. Data were collected using an Indonesia version of Caring Ability Inventory and analyzed using descriptive statistics. The results showed that half of the students had low caring ability (50%), less than half students were in moderate category (42.5%) and a small percentage of students were in high category (7.5%). In conclusion, nursing students caring ability mostly were in low and moderate category. Faculty of Nursing, Padjadjaran University needs to improve attention to the development of students’ caring ability. 

An Experimental Analysis of Bending Behavior of Sandwich Constructions for Transport Industry

2016 ◽  
Vol 827 ◽  
pp. 61-64
Author(s):  
Ladislav Fojtl ◽  
Soňa Rusnáková ◽  
Milan Žaludek ◽  
Vladimír Rusnák
Keyword(s):  
Experimental Analysis ◽  
Failure Modes ◽  
Mechanical Performance ◽  
Core Material ◽  
The Core ◽  
Transport Industry ◽  
Bending Behavior ◽  
The Impact ◽  
Environmental Temperatures ◽  
Sandwich Constructions

In this work the mechanical performance of various sandwich constructions with respect to core material were experimentally evaluated. Sandwich structures were made of glass prepreg and three types of plastic core using vacuum bagging, technology traditionally used for production of parts for transport industry. The aim of this study is to analyze the impact of the core material type and its thickness on bending behavior at different environmental temperatures. Moreover, the effect of core layers compared to one layer core of same thickness was determined. Conducted research provided useful information of bending behavior and showed specific failure modes of individual sandwich constructions.

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