Probability Distributions of Vertical Bending Moments on a FPSO in Abnormal Wave Seastates

2007 ◽  
Author(s):  
Nuno Fonseca ◽  
Ricardo Pascoal ◽  
Carlos Guedes Soares
Keyword(s):  
Probability Distributions ◽  
The Other ◽  
Wave Crest ◽  
Large Set ◽  
Bending Moments ◽  
Wave Groups ◽  
Wave Elevation ◽  
Other Hand

A method to calculate the responses of a FPSO in deterministic wave traces with abnormal waves, has been applied to calculate the motions and global structural loads induced by a large set of abnormal waves that were measured in different places. The present paper is focused on the probability distributions of the motions and global structural loads induced by the seastates which included the abovementioned abnormal waves. The objective is to compare the distributions of the wave elevation with the abnormal wave crest and trough, and to compare the distributions of the platform responses with the responses induced by the abnormal waves. In this way it is possible to conclude if the abnormal waves induce abnormal responses of the platform, or if on the other hand there are wave groups with waves smaller than the abnormal wave that induce larger responses.

scholarly journals Limit theorems for the interference terms of discrete-time quantum walks on the line

2013 ◽  
Vol 13 (7&8) ◽  
pp. 661-671
Author(s):  
Takuya Machida
Keyword(s):  
Density Matrix ◽  
Discrete Time ◽  
Limit Theorems ◽  
Probability Distributions ◽  
Quantum Walks ◽  
The Other ◽  
Density Matrices ◽  
Other Hand ◽  
Time Quantum

The probability distributions of discrete-time quantum walks have been often investigated, and many interesting properties of them have been discovered. The probability that the walker can be find at a position is defined by diagonal elements of the density matrix. On the other hand, although off-diagonal parts of the density matrices have an important role to quantify quantumness, they have not received attention in quantum walks. We focus on the off-diagonal parts of the density matrices for discrete-time quantum walks on the line and derive limit theorems for them.

scholarly journals Study on Nonlinear Stochastic Process of Deck Slamming on Floating Offshore Platform

Processes ◽  
2021 ◽  
Vol 9 (2) ◽  
pp. 231
Author(s):  
Hyun-Seung Nam ◽  
Yonghwan Kim
Keyword(s):  
Statistical Approach ◽  
Volterra Series ◽  
Probability Distributions ◽  
Joint Probability ◽  
Second Order ◽  
Wave Crest ◽  
Order Component ◽  
Wave Elevation ◽  
Order Components ◽  
Joint Probability Density

In this paper, a semi-analytic method is introduced to predict the deck-slamming probability and corresponding loads. This method is based on a nonlinear statistical approach that takes into account the linear and second-order components of the relative wave elevation up to the second order. The linear and second-order wave elevation is assumed to be a two-term Volterra series. The joint probability density function of the relative wave elevation and velocity are formulated using the Hermite-moment method, and the probability distributions of the wave crest and relative wave velocity are calculated. These probability distributions are verified using the data sampled from the linear and second-order relative wave elevation. Based on this formulation, the probabilities of deck slamming and slamming-induced loads are estimated. This method is applied to a tension leg platform (TLP) model, and the effects of the second-order component of the relative wave elevation on the deck slamming are investigated.

scholarly journals Representaciones y conductas. Un repertorio de las violencias entre los nahuas de la Sierra Norte de Puebla

Revista Trace ◽  
2018 ◽  
pp. 9 ◽  
Author(s):  
Pierre Beaucage
Keyword(s):  
Domestic Violence ◽  
Daily Life ◽  
The Other ◽  
Large Set ◽  
Multiple Forms ◽  
Other Hand ◽  
Violencia Domestica ◽  
The One ◽  
Culture Of Violence

Entre los nahuas, no hay un equivalente estricto a “violencia”. Sin embargo, la idea de una fuerza excesiva y peligrosa impregna, por una parte, un amplio conjunto de representaciones míticas (violencia fundadora) y ethohistóricas (agresiones y resistencia). También está muy presente en lo cotidiano, en formas múltiples: robos, envidia, brujería y violencia doméstica. A pesar de lo amplio del fenómeno, cuyo corolario es un “discurso de la desgracia”, no se puede hablar aquí de una cultura de la violencia, puesto que nuestros interlocutores dedican mucho esfuerzo a sobrepasarla para construir una felicidad personal y familiar, aunque la sientan muy frágil.Abstract:Among the Nahua, one does not find a strict equivalent to “violence”. Yet, on the one hand, the idea of an excessive, dangerous force permeates a large set of narratives, mythical (founding violence) and ethnohistorical (aggressions and resistance). On the other hand, violence is quite present in daily life, under multiple forms: thefts, “envy” and witchcraft, domestic violence. In spite of this extension, whose corollary is a “discourse of disgrace”, one cannot speak here of a culture of violence, since our interlocutors devote much energy to overcome it in order to build a personal and familial happiness, however frail they may feel it is.Résumé : Chez les Nahuas, il n’y a pas d’équivalent strict à “violence”. Cependant, l’idée d’une force excessive et dangereuse imprègne, d’une part, un vaste ensemble de représentations mythiques (violence fondatrice) et ethnohistoriques (agressions et résistance). Elle est aussi très présente au quotidien, sous de multiples formes : vols, “envie” et sorcellerie, violence domestique. Malgré l’ampleur du phénomène, dont le corollaire est un “discours du malheur”, on ne peut parler ici de culture de la violence, puisque nos interlocuteurs s’attachent à la surmonter pour construire un bonheur personnel et familial, qu’ils sentent cependant fragile.

scholarly journals Consistency of the Kaplan-Meier Estimator of the Survival Function in Competiting Risks

2018 ◽  
Vol 9 (1) ◽  
pp. 1-17
Author(s):  
Didier Alain Njamen Njomen ◽  
Joseph Wandji Ngatchou
Keyword(s):  
Stochastic Processes ◽  
Probability Distributions ◽  
Survival Function ◽  
The Other ◽  
Nonparametric Estimator ◽  
Uniform Consistency ◽  
Breakdown Time ◽  
Other Hand ◽  
Kaplan Meier

Introduction:In this article, we only focus on the probability distributions of the breakdown time whose causes are known, and we consider a partition of the observations into subgroups according to each of the causes as defined in Njamen and Ngatchou [1]. By adapting the stochastic processes developed by Aalen [2, 3], we derive a Kaplan-Meier [4] nonparametric estimator for the survival function in competiting risks.Result & Discussion:In a region where there is at least one observation, we prove on one hand that this new nonparametric estimator is unbiased in competiting risk and on the other hand, using the Lenglart inequality, we establish its uniform consistency in competiting risks.

A study of cometary eruptions through OH radio-lines

1999 ◽  
Vol 173 ◽  
pp. 249-254
Author(s):  
A.M. Silva ◽  
R.D. Miró
Keyword(s):  
Short Duration ◽  
Growth Curves ◽  
The Other ◽  
Initial Mass ◽  
Radio Lines ◽  
Other Hand ◽  
Sudden Rise

AbstractWe have developed a model for theH2OandOHevolution in a comet outburst, assuming that together with the gas, a distribution of icy grains is ejected. With an initial mass of icy grains of 108kg released, theH2OandOHproductions are increased up to a factor two, and the growth curves change drastically in the first two days. The model is applied to eruptions detected in theOHradio monitorings and fits well with the slow variations in the flux. On the other hand, several events of short duration appear, consisting of a sudden rise ofOHflux, followed by a sudden decay on the second day. These apparent short bursts are frequently found as precursors of a more durable eruption. We suggest that both of them are part of a unique eruption, and that the sudden decay is due to collisions that de-excite theOHmaser, when it reaches the Cometopause region located at 1.35 × 105kmfrom the nucleus.

Closing the GAP—A 5Å Scanning Microscope

1969 ◽  
Vol 27 ◽  
pp. 6-7
Author(s):  
A. V. Crewe
Keyword(s):  
Normal Form ◽  
The Other ◽  
Resolving Power ◽  
Scanning Microscope ◽  
Conventional Microscope ◽  
Other Hand ◽  
Closing The Gap ◽  
Thermal Sources ◽  
Better Than ◽  
Transmission Microscope

We have become accustomed to differentiating between the scanning microscope and the conventional transmission microscope according to the resolving power which the two instruments offer. The conventional microscope is capable of a point resolution of a few angstroms and line resolutions of periodic objects of about 1Å. On the other hand, the scanning microscope, in its normal form, is not ordinarily capable of a point resolution better than 100Å. Upon examining reasons for the 100Å limitation, it becomes clear that this is based more on tradition than reason, and in particular, it is a condition imposed upon the microscope by adherence to thermal sources of electrons.

Life Beyond 1MeV

1980 ◽  
Vol 38 ◽  
pp. 30-33
Author(s):  
K.H. Westmacott
Keyword(s):  
Electron Microscopy ◽  
Past Experience ◽  
The Other ◽  
Good Case ◽  
Other Hand ◽  
The U.S

Life beyond 1MeV – like life after 40 – is not too different unless one takes advantage of past experience and is receptive to new opportunities. At first glance, the returns on performing electron microscopy at voltages greater than 1MeV diminish rather rapidly as the curves which describe the well-known advantages of HVEM often tend towards saturation. However, in a country with a significant HVEM capability, a good case can be made for investing in instruments with a range of maximum accelerating voltages. In this regard, the 1.5MeV KRATOS HVEM being installed in Berkeley will complement the other 650KeV, 1MeV, and 1.2MeV instruments currently operating in the U.S. One other consideration suggests that 1.5MeV is an optimum voltage machine – Its additional advantages may be purchased for not much more than a 1MeV instrument. On the other hand, the 3MeV HVEM's which seem to be operated at 2MeV maximum, are much more expensive.

Can the Academic Self-Concept be Positive and Realistic?

2005 ◽  
Vol 19 (3) ◽  
pp. 129-132 ◽  
Author(s):  
Reimer Kornmann
Keyword(s):  
Academic Performance ◽  
Opposite Effect ◽  
Self Esteem ◽  
Point Of View ◽  
The Other ◽  
Self Concept ◽  
High Ability ◽  
Self Image ◽  
Other Hand

Summary: My comment is basically restricted to the situation in which less-able students find themselves and refers only to literature in German. From this point of view I am basically able to confirm Marsh's results. It must, however, be said that with less-able pupils the opposite effect can be found: Levels of self-esteem in these pupils are raised, at least temporarily, by separate instruction, academic performance however drops; combined instruction, on the other hand, leads to improved academic performance, while levels of self-esteem drop. Apparently, the positive self-image of less-able pupils who receive separate instruction does not bring about the potential enhancement of academic performance one might expect from high-ability pupils receiving separate instruction. To resolve the dilemma, it is proposed that individual progress in learning be accentuated, and that comparisons with others be dispensed with. This fosters a self-image that can in equal measure be realistic and optimistic.

Stories and the Self

2020 ◽  
Vol 32 (2) ◽  
pp. 47-58 ◽  
Author(s):  
Stefan Krause ◽  
Markus Appel
Keyword(s):  
Meta Analysis ◽  
The Self ◽  
The Other ◽  
Lower Degree ◽  
Contrast Effects ◽  
Self Perception ◽  
Self Perceptions ◽  
Other Hand ◽  
The One ◽  
Implicit And Explicit

Abstract. Two experiments examined the influence of stories on recipients’ self-perceptions. Extending prior theory and research, our focus was on assimilation effects (i.e., changes in self-perception in line with a protagonist’s traits) as well as on contrast effects (i.e., changes in self-perception in contrast to a protagonist’s traits). In Experiment 1 ( N = 113), implicit and explicit conscientiousness were assessed after participants read a story about either a diligent or a negligent student. Moderation analyses showed that highly transported participants and participants with lower counterarguing scores assimilate the depicted traits of a story protagonist, as indicated by explicit, self-reported conscientiousness ratings. Participants, who were more critical toward a story (i.e., higher counterarguing) and with a lower degree of transportation, showed contrast effects. In Experiment 2 ( N = 103), we manipulated transportation and counterarguing, but we could not identify an effect on participants’ self-ascribed level of conscientiousness. A mini meta-analysis across both experiments revealed significant positive overall associations between transportation and counterarguing on the one hand and story-consistent self-reported conscientiousness on the other hand.

Don’t Put Me in This Group

2019 ◽  
Vol 50 (2) ◽  
pp. 80-93
Author(s):  
Jort de Vreeze ◽  
Christina Matschke
Keyword(s):  
Positive Emotions ◽  
Negative Emotions ◽  
Negative Information ◽  
The Self ◽  
The Other ◽  
Other Hand ◽  
Group Memberships

Abstract. Not all group memberships are self-chosen. The current research examines whether assignments to non-preferred groups influence our relationship with the group and our preference for information about the ingroup. It was expected and found that, when people are assigned to non-preferred groups, they perceive the group as different to the self, experience negative emotions about the assignment and in turn disidentify with the group. On the other hand, when people are assigned to preferred groups, they perceive the group as similar to the self, experience positive emotions about the assignment and in turn identify with the group. Finally, disidentification increases a preference for negative information about the ingroup.

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