THE APPLICATION OF VARIOUS GEOPHYSICAL TECHNIQUES TO SPECIALIZED ENGINEERING PROJECTS

Geophysics ◽  
1962 ◽  
Vol 27 (2) ◽  
pp. 221-236 ◽  
Author(s):  
William T. McGuinness ◽  
Walter C. Beckmann ◽  
Charles B. Officer
Keyword(s):  
Ground Motion ◽  
Civil Engineering ◽  
Environmental Studies ◽  
Site Investigations ◽  
Seismic Methods ◽  
Geophysical Techniques ◽  
Marine Site ◽  
Engineering Projects

Sonic and seismic methods applied to marine and land civil engineering projects and several unique techniques applied to specialized problems encountered in engineering are described. The geophysical techniques discussed include Sparker and Gas Exploder surveys for marine site investigations, measurements of ground motion for quiet instrument facilities, undersea cable environmental studies, and in situ determination of pile lengths.

scholarly journals Estimation at Completion in Civil Engineering Projects: Review of Regression and Soft Computing Models

2021 ◽  
Vol 2 (2) ◽  
pp. 1-12
Author(s):  
Almahdi Mohamed Araba ◽  
Zubair Ahmed Memon ◽  
Musab Alhawat ◽  
Mumtaz Ali ◽  
Abdalrhman Milad
Keyword(s):  
Soft Computing ◽  
Construction Projects ◽  
Civil Engineering ◽  
Project Managers ◽  
Current Status ◽  
Engineering Project ◽  
Critical Problems ◽  
Future Direction ◽  
Engineering Projects

Construction projects are usually associated with several challenges owing to the varying process during the project lifetime. Hence, the final cost of any civil engineering project is influenced by many factors. There are numerous ways of determining the final cost of a project, however, the most essential approach is the Estimate at Completion (EAC) technique. This technique is mostly favored because it considers the probability of risks and project performance. Furthermore, EAC helps project managers in the definition and determination of the critical problems expected during the project period and the likely solutions toward these problems. In this review research, the basic empirical, regression and advanced soft computing methodologies adopted for the EAC computation, were surveyed and reported in detail. The review established on the base to recognize the modern advancement of the soft computing in computing the EAC with accurate, reliable and robust manner. The review was highlighted the main literature limitation, current status and possible future direction.

scholarly journals Re-Thinking Soil Bioengineering to Address Climate Change Challenges

2021 ◽  
Vol 13 (6) ◽  
pp. 3338
Author(s):  
Slobodan B. Mickovski
Keyword(s):  
Climate Change ◽  
Asset Management ◽  
Civil Engineering ◽  
Sustainable Use ◽  
Address Climate Change ◽  
Soil Bioengineering ◽  
The Future ◽  
Development Goals ◽  
Engineering Projects

Soil bioengineering includes the sustainable use of vegetation for civil engineering purposes, including addressing climate change challenges. Previous research in this area has been focused on determination of the strength and stability that vegetation provides for the soil it grows in. The industry, on the other hand, has concentrated on mainly empirical approaches in the design and construction of nature-based solutions. The aim of this paper is to attempt a reconciliation of the scientific and technical aspects of soil bioengineering with a view of proposing broad guidelines for management of soil bioengineering projects aimed at combatting climate change and achievement of the United Nations Sustainable Development Goals (UN SDGs). More than 20 case studies of civil engineering projects addressing climate change challenges, such as erosion, shallow landslides, and flooding, were critically reviewed against the different project stages and the UN SDGs. The gaps identified in the review are addressed from civil engineering and asset management perspectives, with a view of implementing the scientific and technical nexus in the future. Recommendations are formulated to help civil engineers embrace the multidisciplinary nature of soil bioengineering and effectively address climate change challenges in the future.

The Effect of Coastal Engineering Projects on Microgradients and Mineralization Reactions in Sediments1

1984 ◽  
Vol 16 (1-2) ◽  
pp. 87-94 ◽  
Author(s):  
H J Lindeboom ◽  
A J J Sandee
Keyword(s):  
Coastal Engineering ◽  
Ecological Research ◽  
Recent Introduction ◽  
Dam Building ◽  
Engineering Projects ◽  
Aerobic And Anaerobic ◽  
Insight Into ◽  
Lake Grevelingen

Mineralization reactions can take place in sediments along different aerobic and anaerobic pathways. The recent introduction of microelectrodes for ecological research has enabled the determination of oxygen and sulphide gradients in situ in the sediment. These micro-gradients give insight into the actual mineralization reactions taking place, and changes in these reactions can now be rapidly recorded. This paper describes the use of microelectrodes in the field in Lake Grevelingen. The effect of dam building on oxygen and sulphide microgradients and on mineralization reactions will be discussed.

A4. UNRWA, IMPACT OF THE FIRST PHASE OF THE SECURITY BARRIER ON THE QALQILYA, TULKARM, AND JENIN DISTRICTS, GAZA CITY, JULY 2003 (EXCERPTS).

2003 ◽  
Vol 33 (1) ◽  
pp. 153-160
Keyword(s):  
Civil Engineering ◽  
West Bank ◽  
The West ◽  
Full Report ◽  
The World ◽  
Aid Coordination ◽  
President Bush ◽  
Engineering Projects ◽  
The U.S

The separation wall, one of the largest civil engineering projects in Israel's history, has been criticized even by the U.S. administration, with Condoleezza Rice stating at the end of June 2003 that it ““arouses our [U.S.] deep concern”” and President Bush on 25 July calling it ““a problem”” and noting that ““it is very difficult to develop confidence between the Palestinians and Israel with a wall snaking through the West Bank.”” A number of reports have already been issued concerning the wall, including reports by B'Tselem (available at www.btselem.org), the UN Office for the Coordination of Humanitarian Affairs (available at www.palestinianaid.info), and the World Bank's Local Aid Coordination Committee (LACC; also available at www.palestinianaid.info). UNRWA's report focuses on the segment of the wall already completed and is based on field visits to the areas affected by the barriers, with a special emphasis on localities with registered refugees. Notes have been omitted due to space constraints. The full report is available online at www.un.org/unrwa.

INDIREKTE PAPIERCHROMATOGRAPHISCHE METHODE ZUR BESTIMMUNG DER HARNOESTROGENE

1961 ◽  
Vol 38 (4) ◽  
pp. 545-562 ◽  
Author(s):  
L. Kecskés ◽  
F. Mutschler ◽  
I. Glós ◽  
E. Thán ◽  
I. Farkas ◽  
...  
Keyword(s):  
Pregnant Women ◽  
Granulosa Cell ◽  
Iron Content ◽  
List Type ◽  
Granulosa Cell Tumour ◽  
Hydrolysis Of ◽  
Phenol Fraction ◽  
Qualitative Determination

ABSTRACT 1. An indirect paperchromatographic method is described for separating urinary oestrogens; this consists of the following steps: acidic hydrolysis, extraction with ether, dissociation of phenol-fractions with partition between the solvents. Previous purification of phenol fraction with the aid of paperchromatography. The elution of oestrogen containing fractions is followed by acetylation. Oestrogen acetate is isolated by re-chromatography. The chromatogram was developed after hydrolysis of the oestrogens 'in situ' on the paper. The quantity of oestrogens was determined indirectly, by means of an iron-reaction, after the elution of the iron content of the oestrogen spot, which was developed by the Jellinek-reaction. 2. The method described above is satisfactory for determining urinary oestrogen, 17β-oestradiol and oestriol, but could include 16-epioestriol and other oestrogenic metabolites. 3. The sensitivity of the method is 1.3–1.6 μg/24 hours. 4. The quantitative and qualitative determination of urinary oestrogens with the above mentioned method was performed in 50 pregnant and 9 non pregnant women, and also in 2 patients with granulosa cell tumour.

Single Crystal Growth of High-Pressure Phases of Ice and Salt Hydrate Far Below the Original Melting Point by Mixing Alcohol: Crystal Structure Determination of Magnesium Chloride Heptahydrate

2020 ◽  
Author(s):  
Keishiro Yamashita ◽  
Kazuki Komatsu ◽  
Hiroyuki Kagi
Keyword(s):  
Crystal Structure ◽  
High Pressure ◽  
Crystal Growth ◽  
Single Crystal ◽  
Room Temperature ◽  
Growth Technique ◽  
Salt Hydrate ◽  
X Ray

An crystal-growth technique for single crystal x-ray structure analysis of high-pressure forms of hydrogen-bonded crystals is proposed. We used alcohol mixture (methanol: ethanol = 4:1 in volumetric ratio), which is a widely used pressure transmitting medium, inhibiting the nucleation and growth of unwanted crystals. In this paper, two kinds of single crystals which have not been obtained using a conventional experimental technique were obtained using this technique: ice VI at 1.99 GPa and MgCl<sub>2</sub>·7H<sub>2</sub>O at 2.50 GPa at room temperature. Here we first report the crystal structure of MgCl2·7H2O. This technique simultaneously meets the requirement of hydrostaticity for high-pressure experiments and has feasibility for further in-situ measurements.

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