RESOLUTION AND CURVED PATH COMPUTATION OF STEEP DIP USING AN ELECTRONIC COMPUTER

Geophysics ◽  
1961 ◽  
Vol 26 (6) ◽  
pp. 800-805
Author(s):  
Donald R. Oksa
Keyword(s):  
Electronic Computer ◽  
Velocity Data ◽  
Simple Task ◽  
Reflection Data ◽  
Path Computation ◽  
Different Types ◽  
Separate Entry

A program for a basic IBM 650 electronic computer is discussed that resolves and computes four‐way seismic dip control. The velocity parameters are a separate entry to the program in order that prospect re‐evaluation, because of new velocity data, can be easily accomplished. Ample identification of specific reflection data is permitted. Although written specifically for curved path velocity assumptions, modification for different types of velocity functions would be a comparatively simple task.

FUZZY INTERVALS TO REPRESENT FUZZY VALID TIME IN A TEMPORAL RELATIONAL DATABASE

2009 ◽  
Vol 17 (supp01) ◽  
pp. 173-192 ◽  
Author(s):  
CARMEN GARRIDO ◽  
NICOLÁS MARÍN ◽  
OLGA PONS
Keyword(s):  
Information Source ◽  
Point Of View ◽  
Temporal Data ◽  
Simple Task ◽  
Different Types ◽  
Common Framework ◽  
Meaning Representation ◽  
Valid Time ◽  
Query Operations ◽  
Fuzzy Interval

Temporal databases offer a common framework to those database applications that need to store or handle different types of temporal data from a variety of sources. They allow the concept of time to be handled from the point of view of meaning, representation, and manipulation. Although at first sight the incorporation of time into a database might appear to be a direct and simple task, it is, however, quite complex: not only must new structures and specific operators be included, but the semantics of conventional DML sentences (insert, update, or delete) and queries must be appropriately changed. In addition, temporal information is not always as precise as desired since it might be affected by imprecision due to the use of natural language or to the nature of the information source. In this paper, we deal with the problem of the update (and, implicitly, insert and delete) and query operations when time is expressed by means of a fuzzy interval of dates.

ON WELL VELOCITY DATA AND THEIR APPLICATION TO REFLECTION SHOOTING

Geophysics ◽  
1946 ◽  
Vol 11 (1) ◽  
pp. 66-81 ◽  
Author(s):  
P. E. Narvarte
Keyword(s):  
Velocity Distribution ◽  
Seismic Reflection ◽  
Time Function ◽  
Velocity Data ◽  
Seismic Reflection Data ◽  
Combined Load ◽  
Contour Maps ◽  
Reflection Data ◽  
Time Relation

Current methods of computing seismic reflection data employing the integration of the actual velocity‐depth (or velocity‐time) relation in the velocity column are confronted with difficulties and limitations because they neglect the stratigraphic effect on the velocity distribution. A method is proposed where the measured incremental time‐depth relation, ΔZ/ΔT, to each of a number of stratigraphic markers may be combined into one generalized depth or time function satisfying well velocity data from a number of wells. The proposed method employs the integration of this slope relation and is used in conjunction with regional correction contour maps. Because this relation results from the combined load and stratigraphic effects together with the geological behavior of the section, this method offers distinct advantages both in accuracy and applicability. Advantages and limitations in the application of this method are discussed.

Consequence Analysis of a Liquefied Natural Gas Floating Production Storage Offloading (LNG FPSO) Leakage

2011 ◽  
Author(s):  
Marcelo Ramos Martins ◽  
Gilberto F. M. de Souza ◽  
Nilton Hiroaki Ikeda
Keyword(s):  
Natural Gas ◽  
Main Idea ◽  
Liquefied Natural Gas ◽  
Physical Models ◽  
Quantitative Risk Assessment ◽  
Brazilian Coast ◽  
Atmospheric Conditions ◽  
Simple Task ◽  
Different Types ◽  
Specific Phase

A quantitative risk assessment comprises some basic activities that have to be developed to allow the quantification of the risks involved in the operation of a system or process under analysis. Basically, the likelihood of the undesired events has to be identified as well as their consequences must be calculated. When the risks in the operation of a marine vessel are analyzed, the same process has to be followed. For each specific phase of the marine vessel mission, all of the undesired events must be accurately determined and evaluated. Many different types of undesired events must be investigated, such as: fire, explosion, collision, falling objects and marine hazards. There are many techniques involved in the estimation of the likelihood of the events and the same occurs for the evaluation of their consequences. The purpose of this paper is to study a leakage during a cargo offloading considering a LNG shuttle tanker and a Liquefied Natural Gas Floating Production Storage Offloading (LNG-FPSO) in the Pre Salt Brazilian coast. Once defined the feasible scenarios and the total quantity discharged, the consequences will be evaluated using physical models described in the literature and implemented in commercial softwares. The main idea is to identify all possible consequences and verify their magnitudes. As this is an isolated study, where the likelihood of the event will not be estimated, the final objective is to use the results obtained to predict mitigating measures to the system. This is not a simple task due to the complexity of the phenomena developed after the leakage. In order to verify the extension of possible spread events it is also necessary the identification of many variables, including the atmospheric conditions, the sea condition, the ignition sources, the vessels nearby, the shuttle tanker(s), and the positioning of the vessels involved in the offloading operation.

Middle-Class Formation and Class Alliance

2002 ◽  
Vol 26 (1) ◽  
pp. 105-137 ◽  
Author(s):  
Doowon Suh
Keyword(s):  
Social Class ◽  
Social Structure ◽  
White Collar ◽  
Occupational Structure ◽  
Simple Task ◽  
Trade Unionism ◽  
The Social ◽  
Political Orientations ◽  
Different Types ◽  
White Collar Workers

The fact that white-collar workers share relatively similar experiences of economic hardship and proletarianization across nations but develop clearly different types of trade unionism renders the theoretical relevance of formalist and economist approaches to the class location and class character of whitecollar workers questionable. According to this perspective, notwithstanding ideological and logical variants, social class reflects an occupational conglomerate, and class constituents' consciousness, disposition, and action are determined by their position in the social structure. Analysis of social class becomes a simple task of filling empty strata with workers and debate centers on the demarcation lines within the occupational structure, generating theories of class structure without attention to class agents (Bourdieu 1984). By contrast, historico-cultural, ethnographic approaches to social class, pioneered by E. P. Thompson's monumental work in 1963, turn formalist, economist theories on their head by bringing class agents back in. The process by which workers become class members is considered complex, contingent, and relational: lifestyles, dispositions, modes of collective action, and political orientations blend at a historical juncture in such a way that a class character substantially distinct and sustained enough forms and becomes an important dimension of social structure.

SALT SOLUTION, A SEISMIC VELOCITY PROBLEM IN WESTERN ANADARKO BASIN, KANSAS‐OKLAHOMA‐TEXAS

Geophysics ◽  
1952 ◽  
Vol 17 (3) ◽  
pp. 481-504 ◽  
Author(s):  
M. B. Widess
Keyword(s):  
Ground Water ◽  
Salt Solution ◽  
Seismic Velocity ◽  
Upper Permian ◽  
Velocity Data ◽  
Core Hole ◽  
Velocity Change ◽  
Anadarko Basin ◽  
The Core ◽  
Different Types

Solution of salt from a shallow Upper Permian formation in parts of Western Anadarko Basin was observed to produce a pronounced and relatively abrupt velocity change, such as to cause over 300 feet of seismic relief error across a distance of less than three miles. Core‐hole velocity shooting and velocity profiling were used in the study of the effect of salt solution. The theory, methods, and results of the velocity profiling program are described. The core‐hole velocity data indicate that in the area several environments are present which involve different types of velocity alteration by ground water activity. This kind of phenomenon is considered to be of general significance and related to the spurious representation of surface topography sometimes observed in seismic structural maps.

The extinction time of a general birth and death process with catastrophes

1986 ◽  
Vol 23 (04) ◽  
pp. 851-858 ◽  
Author(s):  
P. J. Brockwell
Keyword(s):  
Laplace Transform ◽  
Size Distribution ◽  
Sufficient Conditions ◽  
Necessary And Sufficient Conditions ◽  
Death Process ◽  
Extinction Time ◽  
Birth And Death Process ◽  
Different Types ◽  
The Laplace Transform ◽  
Necessary And Sufficient

The Laplace transform of the extinction time is determined for a general birth and death process with arbitrary catastrophe rate and catastrophe size distribution. It is assumed only that the birth rates satisfyλ0= 0,λj> 0 for eachj> 0, and. Necessary and sufficient conditions for certain extinction of the population are derived. The results are applied to the linear birth and death process (λj=jλ, µj=jμ) with catastrophes of several different types.

Differentiating between different forms of moral obligations

2020 ◽  
Vol 43 ◽  
Author(s):  
Rajen A. Anderson ◽  
Benjamin C. Ruisch ◽  
David A. Pizarro
Keyword(s):  
Moral Character ◽  
Moral Obligations ◽  
Different Types

Abstract We argue that Tomasello's account overlooks important psychological distinctions between how humans judge different types of moral obligations, such as prescriptive obligations (i.e., what one should do) and proscriptive obligations (i.e., what one should not do). Specifically, evaluating these different types of obligations rests on different psychological inputs and has distinct downstream consequences for judgments of moral character.

Ultrastructural Investigations of the Contractile Filaments of Amoebae

1974 ◽  
Vol 32 ◽  
pp. 188-189
Author(s):  
P.L. Moore
Keyword(s):  
Cytoplasmic Streaming ◽  
Three Dimensional ◽  
Freeze Fracture ◽  
Amoeboid Movement ◽  
Different Types ◽  
Chemical Conditions ◽  
Complete Interpretation

Previous freeze fracture results on the intact giant, amoeba Chaos carolinensis indicated the presence of a fibrillar arrangement of filaments within the cytoplasm. A complete interpretation of the three dimensional ultrastructure of these structures, and their possible role in amoeboid movement was not possible, since comparable results could not be obtained with conventional fixation of intact amoebae. Progress in interpreting the freeze fracture images of amoebae required a more thorough understanding of the different types of filaments present in amoebae, and of the ways in which they could be organized while remaining functional.The recent development of a calcium sensitive, demembranated, amoeboid model of Chaos carolinensis has made it possible to achieve a better understanding of such functional arrangements of amoeboid filaments. In these models the motility of demembranated cytoplasm can be controlled in vitro, and the chemical conditions necessary for contractility, and cytoplasmic streaming can be investigated. It is clear from these studies that “fibrils” exist in amoeboid models, and that they are capable of contracting along their length under conditions similar to those which cause contraction in vertebrate muscles.

Study of the Molecular Architecture of Keratin Filaments by Electron Microscopy

1982 ◽  
Vol 40 ◽  
pp. 118-119
Author(s):  
U. Aebi ◽  
P. Rew ◽  
T.-T. Sun
Keyword(s):  
Electron Microscopy ◽  
Structural Organization ◽  
Cell Types ◽  
Structural Features ◽  
Molecular Architecture ◽  
The Past ◽  
Keratin Filaments ◽  
Different Types ◽  
10 Nm Filaments ◽  
Different Cell Types

Various types of intermediate-sized (10-nm) filaments have been found and described in many different cell types during the past few years. Despite the differences in the chemical composition among the different types of filaments, they all yield common structural features: they are usually up to several microns long and have a diameter of 7 to 10 nm; there is evidence that they are made of several 2 to 3.5 nm wide protofilaments which are helically wound around each other; the secondary structure of the polypeptides constituting the filaments is rich in ∞-helix. However a detailed description of their structural organization is lacking to date.

A New Defect in Polyethylene Single Crystals

1973 ◽  
Vol 31 ◽  
pp. 70-71
Author(s):  
E. L. Thomas ◽  
S. L. Sass
Keyword(s):  
Single Crystals ◽  
Screw Dislocation ◽  
Small Distance ◽  
Dipole Model ◽  
Dislocation Dipole ◽  
Chain Folding ◽  
Black And White ◽  
Polymer Crystal ◽  
Different Types

In polyethylene single crystals pairs of black and white lines spaced 700-3,000Å apart, parallel to the [100] and [010] directions, have been identified as microsector boundaries. A microsector is formed when the plane of chain folding changes over a small distance within a polymer crystal. In order for the different types of folds to accommodate at the boundary between the 2 fold domains, a staggering along the chain direction and a rotation of the chains in the plane of the boundary occurs. The black-white contrast from a microsector boundary can be explained in terms of these chain rotations. We demonstrate that microsectors can terminate within the crystal and interpret the observed terminal strain contrast in terms of a screw dislocation dipole model.

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