A new approach for preparation of quantitative seismicity maps as applied to Alpide Belt-Sunda Arc and adjoining areas

1971 ◽  
Vol 61 (5) ◽  
pp. 1275-1291 ◽  
Author(s):  
K. L. Kaila ◽  
Hari Narain
Keyword(s):  
Area Under The Curve ◽  
Cumulative Number ◽  
Regression Curve ◽  
New Approach ◽  
Regression Curves ◽  
A Value ◽  
The Earth ◽  
Sunda Arc ◽  
Graph Paper ◽  
Earthquake Observation

abstract A new method is developed for preparation of quantitative seismicity maps of an area. In this method, the slope b of the cumlative regression curve log N = A − bM, is supposed to be variable from one region to another and not constant as assumed by Riznichenko (1958) in his seismostatistical method. Under such a premise of variable b, the seismicity at any place is defined as log of the area under the curve representing incremental number of earthquakes versus magnitude on linear graph paper, within the magnitude range M = M to M = Mmax. The log of the total area under such a curve from magnitude M = 0 to M = Mmax will represent A value on the cumulative regression curve, and the same can also be used as a measure of seismicity level in any region. Worldwide relations are established between N(occ) the cumulative number of earthquakes occurring in an area with magnitude 4 and above and those actually detected N(det). This enables one to define the ratio between log N(det) and log N(occ) as the detectability level D of an area. The constants A and b of the cumulative regression curves for various regions of the Earth (normalized to 2° × 2° grid area and 14-year period of earthquake observation) are found to be related to each other by the equation A = 6.35b − 1.41. Making use of this relation and the detectability level D, b and the normalized A values for every 2° × 2° grid area as at the equator can be calculated. These A or b values are then used to draw the seismicity maps for any region of the Earth. Using this new approach, a quantitative seismicity map based on A values has been prepared for the entire Alpide Belt-Sunda Arc and adjoining areas. This seismicity map has not only brought out the regions of high and low seismicity in great detail, but, at the same time, it also shows the trends of these highs and lows very clearly. This map is then compared with regional seismic zoning maps prepared by other workers covering small portions of this seismic belt and the two pictures are seen to show very good agreement both qualitatively as well as quantitatively.

Seismotectonic maps of the European area

1975 ◽  
Vol 65 (6) ◽  
pp. 1721-1732
Author(s):  
K. L. Kaila ◽  
N. Madhava Rao
Keyword(s):  
B Value ◽  
Regression Curve ◽  
B Values ◽  
Regression Curves ◽  
European Area ◽  
A Value ◽  
The Alps ◽  
Seismotectonic Map ◽  
Good Agreement ◽  
Regional Tectonics

abstract Seismicity maps based on A value, b value, and return period for earthquakes with magnitude 6 and above have been prepared for the European area using the Kaila and Narain (1971) method. For the preparation of these maps, a modified relation A = 6.36b − 1.00 has been used instead of the earlier relation where A and b are constants in the cumulative regression curve represented by log N = A − bM. The A-value seismicity map also shows regional tectonics superimposed on it, thus yielding the seismotectonic map of Europe. These seismicity maps reveal that the European area consists of seven main high seismic activity zones named as the Balkan high, the Aegean high, the Apennine-sicilian high, the Alps high, the Carpathian high, the Saharan-Pyrenees high and the Iceland-Arctic high which are described in detail with their relationship to regional tectonics. The b values determined by the new method and shown on the b-value seismicity map are compared with those determined by other workers using earthquake regression curves for various regions of Europe and they show a very good agreement with each other.

Synthesis and characterization of novel functionalized perarylated polysiloxane for proton exchange membrane fuel cells

MRS Advances ◽  
2019 ◽  
Vol 4 (64) ◽  
pp. 3579-3585
Author(s):  
Guillermo M. González Guerra ◽  
Alejandro Alatorre-Ordaz ◽  
Gerardo González Garcia ◽  
Jesus S. Jaime-Ferrer
Keyword(s):  
Cyclic Voltammetry ◽  
Fuel Cells ◽  
Proton Exchange Membrane ◽  
Area Under The Curve ◽  
Chlorosulfonic Acid ◽  
Proton Exchange ◽  
Synthesis And Characterization ◽  
A Value ◽  
Exchange Membrane

ABSTRACTThis work presents the synthesis and characterization of a pearylated polysiloxane material (PAP) from a polycondensation reaction, followed by functionalization with HClSO3 by an electrophilic substitution reaction. According to the characterization techniques applied, a sulfonated pearylated polysiloxane was also obtained, (SPAP). The purpose of this sulfonated material is to obtain an ionomer able to be applied in hydrogen fuel cells of the proton exchange membrane kind (PEMFC). The reaction to produce the polysiloxane precursor was carried out with the commercial reagents: PhSiCl3, Ph2SiCl2 and Ph3SiCl in anhydrous THF at 75 °C and the SPAP material was obtained by sulfonation of the precursor with chlorosulfonic acid. PAP and SPAP were characterized by 1H, NMR for liquids, 29Si NMR for solids, IR-ATR, SEM, and cyclic voltammetry. The NMR 29Si spectra show that PAP and PAPS contain crosslinking regions due to PhSiCl3, growing chain zones due to Ph2SiCl2 and polymer termination zones due to Ph3SiCl, obtaining a mixture of siloxanes. The analysis by cyclic voltammetry indicates that by integrating the area under the curve of the adsorption peaks of H2, a value of 0.062 mC/cm2 is obtained, a value close to the commercial ionomer of Nafion®.

scholarly journals FRI0234 A HIGH NEMO SCORE IN VIDEOCAPILLAROSCOPY IS PREDICTIVE OF FUTURE DEVELOPMENT OF DIGITAL ULCERS IN PATIENTS WITH SYSTEMIC SCLEROSIS

2020 ◽  
Vol 79 (Suppl 1) ◽  
pp. 700.1-701
Author(s):  
N. Del Papa ◽  
F. Pignataro ◽  
W. Maglione ◽  
A. Minniti ◽  
D. Sambataro ◽  
...  
Keyword(s):  
Systemic Sclerosis ◽  
Future Development ◽  
Area Under The Curve ◽  
Subsequent Development ◽  
State Level ◽  
Receiver Operating Curve ◽  
Digital Ulcers ◽  
Cumulative Number ◽  
Predictive Values

Background:Nailfold videocapillaroscopy (NVC) is a feasible method that allows the observation and follow-up of the microvascular changes that mark the course of Systemic Sclerosis (SSc). In previous studies, we demonstrated that the NEMO score, namely the cumulative Number of microhaEMOrrhages and microthromboses, is a good indicator of the steady state level and over time changes of disease activity (DA) in SSc (1-3).Objectives:To verify whether a high NEMO score, and then a high level of active microvascular derangement in the fingers may be predictive of the subsequent development of ischemic digital ulcers (IDUs).Methods:The NEMO score was assessed at baseline (T0) in 98 patients affected by SSc, according to the ACR-EULAR criteria. Out of them, 90 were females, 48 had the limited form and 50 the diffuse cutaneous variant of SSc. ACA and anti-Scl-70 antibodies were positive in 42 and 50 patients, respectively. The NVC pattern was early, active and late in 16, 42 and 40 patients, respectively.Afterwards, patients were closely followed up for 3 years, and the appearance of new IDUs was recorded in any time of the follow up.The T0-NEMO score values of patients who developed IDUs were compared to those of patients who did not. A receiver operating curve (ROC) was constructed, and the area under the curve (AUC) calculated, by plotting the sensitivity and 1-specificity of the different NEMO score values in predicting the development of IDUs.Results:During the follow up, 38 out of 98 patients developed one or more DUs. The NEMO score at T0 was significantly higher in those who developed IDUs with respect to those who did not [median 14.5 (CI 11.0-21.5), and 4.5 (CI 4.0-6.0), respectively, p<.0001]. The AUC was 0.79 (CI 0.69-0.86, p<0.0001). A NEMO score of 12 or more had a sensitivity of 83.3 (CI 71.5-91.7), and a specificity of 63.2 (CI 46.0-78.2), with positive (P) and negative (N) predictive values (PV) of 59.1 (CI 44.9-72.3), and 85.6 (CI 71.7-94.3), respectively. A NEMO score of 16 or more had a sensitivity of 95.0 (CI 86.1-99.0), and a NPV of 93.3 (CI 77.4-99.2).Conclusion:NEMO score is not only a valid tool to assess the level of DA in the course of SSc, but this NVC parameter could also be used as a good predictor of the future development of IDUs in patients with this disease.References:[1]Sambataro et al. Arthritis Res Ther 2014;16:462-69[2]Andracco et al. Arthritis Res Ther 2017;19:133-41[3]Pignataro et al. Arthritis Res Ther. 2019;21(1):258Disclosure of Interests:Nicoletta Del Papa: None declared, Francesca Pignataro: None declared, Wanda Maglione: None declared, Antonina Minniti: None declared, Domenico Sambataro: None declared, Gianluca Sambataro: None declared, Gabriele Valentini Grant/research support from: BMS, MSD, NOVARTIS, LILLY, PFIZER, ABBVIE, CELGENE, Claudio Vitali: None declared, Roberto Caporali Consultant of: AbbVie; Gilead Sciences, Inc.; Lilly; Merck Sharp & Dohme; Celgene; Bristol-Myers Squibb; Pfizer; UCB, Speakers bureau: Abbvie; Bristol-Myers Squibb; Celgene; Lilly; Gilead Sciences, Inc; MSD; Pfizer; Roche; UCB

scholarly journals Symmetry breakdown and coupling constants of leptons

2007 ◽  
Vol 79 (2) ◽  
pp. 195-208 ◽  
Author(s):  
Gil C. Marques ◽  
Dominique Spehler
Keyword(s):  
Coupling Constants ◽  
Electroweak Interactions ◽  
New Approach ◽  
Fundamental Interactions ◽  
Electromagnetic Interactions ◽  
Symmetry Breakdown ◽  
A Value ◽  
Intermediate Bosons ◽  
The One ◽  
The Way

Based on a new approach to symmetries of the fundamental interactions we deal, in this paper, with the electroweak interactions of leptons. We show that the coupling constants, arising in the way leptons are coupled to intermediate bosons, can be understood as parameters associated to the breakdown of SU(2) and parity symmetries. The breakdown of both symmetries is characterized by a new parameter (the asymetry parameter) of the electroweak interactions. This parameter gives a measure of the strength of breakdown of symmetries. We analyse the behaviour of the theory for three values of this parameter. The most relevant value is the one for which only the electromagnetic interactions do not break parity (the maximally allowed left-right asymetric theory). Maximamally allowed parity asymmetry is a requirement that is met for a value of Weinberg's theta-angle that is quite close to the experimental value of this parameter.

scholarly journals Mantle Rayleigh waves from the Kamchatka earthquake of November 4, 1952*

1954 ◽  
Vol 44 (3) ◽  
pp. 471-479
Author(s):  
Maurice Ewing ◽  
Frank Press
Keyword(s):  
Internal Friction ◽  
Rayleigh Waves ◽  
Shear Velocity ◽  
Velocity Curve ◽  
The Core ◽  
Long Period ◽  
A Value ◽  
The Earth ◽  
Dispersion Data ◽  
Kamchatka Earthquake

Abstract Mantle Rayleigh waves from the Kamchatka earthquake of November 4, 1952, are analyzed. The new Palisades long-period vertical seismograph recorded orders R6–R15, the corresponding paths involving up to seven complete passages around the earth. The dispersion data for periods below 400 sec. are in excellent agreement with earlier results and can be explained in terms of the known increase of shear velocity with depth in the mantle. Data for periods 400-480 sec. indicate a tendency for the group velocity curve to level off, suggesting that these long waves are influenced by a low or vanishing shear velocity in the core. Deduction of internal friction in the mantle from wave absorption gives a value 1/Q = 370 × 10−5 for periods 250-350 sec. This is a little over half the value reported earlier for periods 140-215 sec.

scholarly journals Gravitational differentiation in the regimes from stokes settling to Rayleigh–Raylor flows

2019 ◽  
pp. 15-30
Author(s):  
V. P. Trubitsyn
Keyword(s):  
Viscous Fluid ◽  
Interacting Particles ◽  
Small Particles ◽  
Continuous Transition ◽  
New Approach ◽  
Earth's Core ◽  
The Core ◽  
The Earth ◽  
Large Particles ◽  
Two Component

The Earth’s core was formed under gravitational differentiation in the course of the separation of iron and silicates. Most of the iron has gone into the core as early as when the Earth was growing. However, iron continued to precipitate even during the subsequent partial solidification which developed from the bottom upwards. At the different stages and in the different layers of the mantle, iron was deposited in different regimes. In this paper, the mechanisms of the deposition of a cloud of heavy interacting particles (or drops) in a viscous fluid are considered. A new approach suitable for analytical and numerical tracing the changes in the structure of the flows in a two-component suspension under continuous transition from the Stokessettling (for the case of a cloud of large particles) to the Rayleigh–Taylor flows and heavy diapirs (for the case of a cloud of small particles) is suggested. It is numerically and analytically shown that the both regimes are the different limiting cases of the sedimentation convection in suspensions.

scholarly journals VIEWS OF POLITICAL AND PHILOSOPHICAL TRENDS RELATED TO THE LAND CONFLICT AND ITS STATUS

Adam alemi ◽  
2021 ◽  
Vol 90 (4) ◽  
pp. 123-132
Author(s):  
R. Akhmaganbetov ◽  
Keyword(s):  
Comparative Analysis ◽  
Land Conflicts ◽  
Land Conflict ◽  
A Value ◽  
The Earth ◽  
The Status ◽  
Actual Conflict ◽  
Points Of View

The land conflict has long been a type of actual conflict. There are land conflicts of various levels in Kazakhstan. There are different points of view related to the land conflict. There are many prerequisites for the emergence of these views. The study examined the views of representatives of various political and philosophical trends related to the status of the earth. Representatives of the liberal trend consider land as capital. The analysis of the works of representatives of the liberal movement considering land as capital is carried out. Representatives of the socialist trend consider land as state property. Lenin's works deal with issues related to the resolution of the land conflict. Representatives of postcolonialism explain the emergence of the earthly conflict by the influence of colonial empires. In connection with the land conflict, the positions of the Alash intelligentsia are considered. Meanwhile, the analysis of differences in the views of socialists and the Alash intelligentsia in resolving the land conflict was carried out. In traditional Kazakh society, land is considered as a value. This is not consistent with the concepts of capital or property. The earth is considered as a sacred concept. A comparative analysis of such different points of view is carried out. The historical prerequisites for the emergence of a land conflict at the present time are considered.

scholarly journals Power system voltage collapse prediction using a new line stability index (NLSI-1): A case study of the 330-kV nigerian national grid

2019 ◽  
Vol 9 (6) ◽  
pp. 5125
Author(s):  
I. A. Samuel ◽  
J. Katende ◽  
C. O. A. Awosope ◽  
A. A. Awelewa ◽  
A. I. Adekitan ◽  
...  
Keyword(s):  
Power System ◽  
Stability Index ◽  
Base Case ◽  
Voltage Collapse ◽  
Cumulative Number ◽  
The Novel ◽  
A Value ◽  
System Collapse ◽  
The Difference ◽  
Reliability Issue

The cumulative number of historical and recent power system outages substantiates the fact that further studies are necessary for an improved solution to the issue of voltage instability on the grid and the subsequent system collapse. Voltage collapse is a serious reliability issue which inhibits the objective of running a reliable and secure power system network. In this study, a new line stability index (NLSI_1) for predicting voltage collapse is presented.  The new index considers a switching logic which is derived from the difference of voltage angle between the two load buses. The index is deployed for performance analysis using the 28-bus, 330-kV Nigeria National Grid (NNG).  The simulation implemented in MATLAB shows that the index gives the same results as Line stability index (Lmn) and Fast Voltage Stability Index (FVSI) indices. The base case and the contingency scenarios were considered during the simulation. The base case analysis using the NNG values of all the three indices FVSI, Lmn, and NLSI_1 for simulation generates a value less than one for the entire lines which implies that the NNG is stable in this mode. The values of the three indices are almost the same, which confirms the accuracy of the novel index developed. The analysis for the contingency case reveals that the load bus 16 (Gombe) which has the lowest, maximum permissible reactive load of 139.5MVAR is the weakest; also power line 16-19 is identified as the critical line. The result of the simulation confirms that the accuracy was improved by using NLSI_1.

A Simple Method for Estimating the Parameters of the Beta Distribution Applied to Modeling Uncertainty in Gas Turbine Inlet Temperature

2002 ◽  
Author(s):  
Frederic A. Holland
Keyword(s):  
Standard Deviation ◽  
Conventional Method ◽  
Beta Distribution ◽  
Conventional Approach ◽  
Algebraic Solution ◽  
Inlet Temperature ◽  
Shape Parameters ◽  
Simple Method ◽  
New Approach ◽  
A Value

The beta distribution is a particularly convenient model for random variables when only the minimum, maximum and most likely values are available. It is also very useful for estimating the mean and standard deviation given this information. In this paper a simple method is proposed to estimate the beta parameters from these three values. The proposed method has advantages over the conventional approach. In the conventional approach, the four parameters of the beta distribution are determined from only three values by assuming a standard deviation that is one-sixth the range. In contrast, the new method assumes a value for one of the beta shape parameters based on an analogy with the normal distribution. This new approach allows for a very simple algebraic solution of the beta shape parameters in contrast to the simultaneous solution required by the conventional method. The results of the proposed method are very similar to the conventional method. However, the proposed method generally gives a slightly higher (more conservative) estimate of the standard deviation when the distribution is skewed. In addition, the new approach allows the standard deviation to vary as the shape or skew of the distribution varies. Both methods were applied to modeling the probability distribution of temperature.

Merengkuh Bumi Merawat Semesta: Mengupayakan Hermeneutik Ekologis dalam Rangka Menanggapi Kerusakan Lingkungan Dewasa Ini

2021 ◽  
Vol 1 (1) ◽  
pp. 71
Author(s):  
Darius Ade Putra
Keyword(s):  
Biblical Text ◽  
New Paradigm ◽  
New Approach ◽  
Ecological Damage ◽  
The Bible ◽  
The Earth ◽  
The 1960S ◽  
The Universe

Abstract Since the 1960s, started by Lynn White, Christianity has begun to get attacks because it is considered to have triggered ecological damage. Christianity through the teachings of the Bible is accused of legitimizing absolute anthropocentric ideas which then give rise to expansive actions to the environment and nature. In the midst of the massive damage to the environment and in order to fi nd a possible solution to this problem, it is felt necessary to resonance the new approach to the Scriptures that further explores the sound of the earth. One approach that can be developed is ecological hermeneutics. Based on several principles it is possible to see and understand the biblical text from the perspective of the earth. In addittion, this approach will be elaborated with local wisdom so that it can help the text contextualization process. In the end, a new paradigm is expected to encourage awareness of the importance to tend the universe.   Abstrak Sejak tahun 1960an, dimulai oleh Lynn White, Kekristenan mulai mendapat serangan karena dinilai telah menjadi pemicu kerusakan ekologi. Kekristenan melalui ajaran Alkitab dituduh melegitimasi gagasan-gagasan antroposentris absolut yang kemudian melahirkan tinndakan- tindakan ekspansif terhadap lingkungan dan alam. Di tengah masifnya kerusakan lingkungan dan dalam rangka mencari kemungkinan jalan keluar dari persoalan ini, dirasa perlu untuk menggemakan pendekatan baru pada Kitab Suci yang lebih mengeksplorasi suara bumi. Salah satu pendekatan yang bisa dikembangkan adalah hermeneutik ekologi. Berdasarkan beberapa prinsip-prinsipnya memungkinkan untuk melihat dan memahami teks Alkitab dari perspektif bumi. Selain itu, pendekatan ini akan dielaborasi dengan local widom agar membantu proses kontekstualisasi teks. Pada akhirnya diharapkan sebuah paradigma baru yang mendorong kesadaran akan pentingnya merawat alam semesta.

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