scholarly journals Advanced Applications for Underwater Acoustic Modeling

2012 ◽  
Vol 2012 ◽  
pp. 1-28 ◽  
Author(s):  
Paul C. Etter
Keyword(s):  
Seismic Exploration ◽  
Anthropogenic Activity ◽  
Modeling Tools ◽  
New Developments ◽  
Natural Factors ◽  
Maritime Shipping ◽  
Modeling Techniques ◽  
Sonar Systems ◽  
Novel Processing ◽  
Exploration Activity

Changes in the ocean soundscape have been driven by anthropogenic activity (e.g., naval-sonar systems, seismic-exploration activity, maritime shipping and windfarm development) and by natural factors (e.g., climate change and ocean acidification). New regulatory initiatives have placed additional restrictions on uses of sound in the ocean: mitigation of marine-mammal endangerment is now an integral consideration in acoustic-system design and operation. Modeling tools traditionally used in underwater acoustics have undergone a necessary transformation to respond to the rapidly changing requirements imposed by this new soundscape. Advanced modeling techniques now include forward and inverse applications, integrated-modeling approaches, nonintrusive measurements, and novel processing methods. A 32-year baseline inventory of modeling techniques has been updated to reflect these new developments including the basic mathematics and references to the key literature. Charts have been provided to guide soundscape practitioners to the most efficient modeling techniques for any given application.

MAIN RESULTS OF REGIONAL SEISMIC EXPLORATION ACTIVITY IN SOUTHERN PART OF VILYUY SYNECLISE, REPUBLIC OF SAKHA (YAKUTIA)

2021 ◽  
Vol 16 (3) ◽  
Author(s):  
V.A. Trofimov ◽  
F.F. Zakirov ◽  
L.Yu. Kolesnichenko ◽  
V.I. Kosovtsev ◽  
K.A. Slonchak
Keyword(s):  
Seismic Exploration ◽  
Exploration Activity

scholarly journals Commission 14: Atomic and Molecular Data: (Donnees Atomiques et Moleculaires)

2000 ◽  
Vol 24 (1) ◽  
pp. 380-420
Author(s):  
F. Rostas ◽  
P. L. Smith ◽  
K. A. Berrington ◽  
N. Feautrier ◽  
N. Grevesse ◽  
...  
Keyword(s):  
Case Studies ◽  
Executive Committee ◽  
Molecular Cloud ◽  
Molecular Data ◽  
Research Community ◽  
General Assembly ◽  
Modeling Tools ◽  
New Developments ◽  
Interdisciplinary Character

In recognition of its special interdisciplinary character, IAU Commission 14 is linked directly to the Executive Committee. The Commission’s role is to inform the astronomical community of new developments in the diverse fields of research which involve atoms and molecules. Conversely it endeavors to sensitize the research community active in those fields to the specific needs of astronomy, especially concerning basic data and modeling tools. More generally, Commission 14 tries to foster long term relations and collaborations between the two communities and, when necessary, to alert funding authorities to the specific needs of ground and space based astronomy for specific atomic and molecular data. This report is one of the main contributions of Commission 14 to the information of the astronomical community. Several meetings concerned, at least in part, with the need and availability of atomic and molecular data for astrophysics were also sponsored or co-sponsored. In the last triennium, Commission 14 cosponsored IAU Symposium 194 “Astrochemistry: From Molecular Cloud to Planetary Systems” held in Sogwipo (Korea) from Aug. 23 to 27, 1999 and organized by Commission 34. A Joint Discussion: JD1 on “Atomic and Molecular Data for Astrophysics, New Developments, Case Studies and Future Needs” has been planned for the XXIVth IAU General Assembly in Manchester (Aug. 7-19, 2000) and cosponsored by Commissions 15, 16, 29, 34, 36, 40 and 44. Several other Joint Discussions to be held at the Manchester General Assembly are co-sponsored by this commission.

The Evolution of Diesel Engine Performance Prediction

2014 ◽  
Author(s):  
Roy J. Primus
Keyword(s):  
Performance Prediction ◽  
Engine Performance ◽  
Thermodynamic System ◽  
Computer Hardware ◽  
Modeling Tools ◽  
Modeling Techniques ◽  
Analytical Tools ◽  
Physical Phenomena ◽  
Engine Development ◽  
Limited Scope

Thermodynamic system performance modeling has become an integral part of the engine development process. The modeling tools used for this type of analysis have evolved from fairly simple calculations of limited scope into detailed simulations with ever-increasing complexity. These analytical tools are based on the combination of basic concepts, physical phenomena and experimental correlations. As with other categories of analysis, their evolution has also been closely coupled with the advances in computer technology. This document provides a historic view of thermodynamic system simulation and revisits some of the developments in modeling techniques, engine measurements, data acquisition systems and computer hardware that have contributed to the understanding of engine performance prediction.

A system for tracking frequency‐modulated bowhead whale calls on vector sensors in the presence of seismic exploration activity.

2010 ◽  
Vol 128 (4) ◽  
pp. 2300-2300
Author(s):  
Aaron Thode ◽  
Katherine H. Kim ◽  
Susanna B. Blackwell ◽  
Charles R. Greene ◽  
Michael Macrander
Keyword(s):  
Bowhead Whale ◽  
Seismic Exploration ◽  
Vector Sensors ◽  
Exploration Activity

scholarly journals Advanced Modeling Techniques for Architectural Design Education

2017 ◽  
Vol 13 (1) ◽  
pp. 106-111
Author(s):  
Arne Riekstins
Keyword(s):  
3D Modeling ◽  
Design Education ◽  
Architectural Design ◽  
Driving Forces ◽  
Modeling Tools ◽  
Modeling Techniques ◽  
Cad Cam ◽  
Generative Algorithms ◽  
Design Skills ◽  
Architectural Design Education

Abstract This article discusses the usage of advanced modeling techniques in architectural design education from the viewpoint of CAD/CAM paradigm that is setting new standards for the teaching and the industry. Parametricism is one of the main driving forces in architecture that exercises complexity possible only through 3D modeling tools and using generative algorithms. Most of the design skills are being learned by applying the obtained knowledge in academic design projects and their supplementary classes.

SEISMIC CREW SURVEY

Geophysics ◽  
1976 ◽  
Vol 41 (1) ◽  
pp. 161-161
Keyword(s):  
Seismic Exploration ◽  
The Third ◽  
Exploration Activity ◽  
The U.S

SEG’s November 1975 count of seismic crews active in the U.S. and U.S. waters, including Alaska, shows a decline for the third straight month and a continuation of the downward slide in seismic exploration activity which began in July 1974. The total crew figure for November 1975 is 265, down five crews from the previous month. This reflects a net decline of three land and two marine crews.

scholarly journals Quantitative Modeling of Spasticity for Clinical Assessment, Treatment and Rehabilitation

Sensors ◽  
2020 ◽  
Vol 20 (18) ◽  
pp. 5046
Author(s):  
Yesung Cha ◽  
Arash Arami
Keyword(s):  
Wearable Sensors ◽  
Quantitative Modeling ◽  
Common Symptom ◽  
Mechanical Modeling ◽  
Threshold Control ◽  
New Developments ◽  
Future Studies ◽  
Rehabilitation Programs ◽  
Modeling Techniques

Spasticity, a common symptom in patients with upper motor neuron lesions, reduces the ability of a person to freely move their limbs by generating unwanted reflexes. Spasticity can interfere with rehabilitation programs and cause pain, muscle atrophy and musculoskeletal deformities. Despite its prevalence, it is not commonly understood. Widely used clinical scores are neither accurate nor reliable for spasticity assessment and follow up of treatments. Advancement of wearable sensors, signal processing and robotic platforms have enabled new developments and modeling approaches to better quantify spasticity. In this paper, we review quantitative modeling techniques that have been used for evaluating spasticity. These models generate objective measures to assess spasticity and use different approaches, such as purely mechanical modeling, musculoskeletal and neurological modeling, and threshold control-based modeling. We compare their advantages and limitations and discuss the recommendations for future studies. Finally, we discuss the focus on treatment and rehabilitation and the need for further investigation in those directions.

RESEARCH AND PROGRESS IN EXPLORATION

Geophysics ◽  
1958 ◽  
Vol 23 (2) ◽  
pp. 267-284 ◽  
Author(s):  
Henry F. Dunlap ◽  
Curtis H. Johnson
Keyword(s):  
Academic Research ◽  
The United States ◽  
Seismic Exploration ◽  
Mass Spectrometers ◽  
Near Surface ◽  
New Developments ◽  
Eastern Hemisphere ◽  
Ore Bodies ◽  
Continuous Waves ◽  
Electrical Prospecting

This is a general review of new developments in geophysical exploration in 1957. In the Eastern Hemisphere, the strong emphasis on the use of refined seismograph techniques in virgin territories despite extreme operating problems is a development of primary importance. In mining geophysics a new Swedish development employs a rotary electromagnetic field and two‐plane operation to improve substantially the economy and effectiveness of reconnaissance for conductive ore‐bodies. In the United States new developments include work on a method of seismic exploration using continuous waves rather than pulses, the incorporation of transistors into seismic units, a trend toward simplified equipment for plotting seismic record sections, an electrical prospecting method which permits detection of near surface structures in water‐covered areas, and the increased use of continuous velocity logs. Other developments have occurred in the field of chemical logging, including the use of mass spectrometers, infrared analyzers, and gas chromatographic columns. Academic research into techniques for dating feldspar‐bearing rocks has advanced spectacularly. It is now possible to obtain dates on certain kinds of rocks extending from a few thousand years to a few billion years in age.

scholarly journals Modeling and Simulation: A User’s Perspective

2000 ◽  
Author(s):  
Paul Alves
Keyword(s):  
Fluid Dynamics ◽  
Finite Element ◽  
Dynamic System ◽  
Finite Element Modeling ◽  
Modeling And Simulation ◽  
Modeling Tools ◽  
The Past ◽  
Modeling Techniques ◽  
The One ◽  
Clear Idea

Lighter structures, specialty materials, higher rotational speeds, greater flows, higher temperatures and horsepower, all lead to higher efficiencies and less pollution. The designs of mechanical systems are being pushed to great extremes and therefore call for much greater accuracy in modeling the systems. The work of the design engineer has been facilitated immensely over the past few years by the introduction of computerized modeling tools. Stress Finite Element Modeling, Rotordynamic Analysis, Computerized Fluid Dynamics and Modal Analysis are some of these tools. They are also used extensively in the audit of designs if troubleshooting of a dynamic system becomes a requirement. The primary intent of this paper is to give the reader, the ability to coordinate the modeling work in an intelligent and authoritative way when he/she is not the one actually entering the numbers. It should also offer a clear idea of what the objectives of such analyses are, and an understanding of how these modeling techniques work, with their limitations and requirements, and sufficient knowledge to make decisions about the acceptability of the design.

SEISMIC CREW SURVEY

Geophysics ◽  
1976 ◽  
Vol 41 (4) ◽  
pp. 795-795 ◽  
Keyword(s):  
Seismic Exploration ◽  
Oil Companies ◽  
Exploration Activity ◽  
The U.S

SEG’s May survey of oil companies and domestic seismic contractors indicated a seasonal increase in seismic exploration activity during the month — the first reversal of the downtrend which began in September 1975. SEG’s count of seismic crews active in the U.S. and U.S. waters during May is 247, up nine crews from the 238 reported in April. This increase compares with a three‐crew increase during the same two months in 1975 (283 to 286).

Sign in / Sign up

Export Citation Format

Share Document