Spatial and time variations of seismicity before strong earthquakes in the southern part of the Balkans

2021 ◽  
Vol 64 (4) ◽  
pp. SE433
Author(s):  
Emil Iliev Oynakov ◽  
Emil Aleksandrov Botev
Keyword(s):  
B Value ◽  
Seismic Quiescence ◽  
Earthquake Catalog ◽  
Statistical Parameters ◽  
The Balkans ◽  
A Value ◽  
Joint Interpretation ◽  
Time Variations ◽  
Spatial Window ◽  
The University

A retrospective analysis of the spatial and time variations of three main statistical parameters of the seismicity before recent 4 stronger earthquakes (2015 – 2020) in the southern Balkans is presented. The modern extended software package ZMAP with various advanced seismological functions for earthquake catalog analysis is used for estimating the spatial-time variations in a- value (seismic activity), b-value (slope of the recurrence graph) and z-value (parameter of the relative seismic quiescence). The catalog data from constantly updated catalog of the University of Athens for the period 1964-2020 and spatial window 32° - 44° N and 10° – 30° E are used for the various statistical interpretations. The main result of the whole analysis is that the abnormally low b-values and high z-values, defining the zones of relatively seismic quiescence, may be an indicator of imminent release of more significant stress in areas adjacent to the zones of relatively high a-values. Thus, the result of the proposed joint interpretation of the spatial-time variations of these three statistical parameters of seismicity could be considered as a kind of predictor of the stronger recent seismic events in the southern part of Balkans.

scholarly journals ANALISIS TINGKAT SEISMISITAS DAN TINGKAT KERAPUHAN BATUAN DI MALUKU UTARA

2015 ◽  
Vol 17 (1) ◽  
pp. 94
Author(s):  
Vienda Gaby Lumintang ◽  
Guntur Pasau ◽  
Seni J Tongkukut
Keyword(s):  
Maximum Likelihood ◽  
Maximum Likelihood Method ◽  
B Value ◽  
Likelihood Method ◽  
Earthquake Catalog ◽  
Maximum Likelihood Analysis ◽  
Repetition Period ◽  
Earthquake Recurrence ◽  
A Value ◽  
Likelihood Analysis

ANALISIS TINGKAT SEISMISITAS DAN TINGKAT KERAPUHAN BATUAN DI MALUKU UTARA ABSTRAK Telah dilakukan penelitian untuk menentukan tingkat seismisitas dan tingkat kerapuhan batuan melalui perhitungan nilai a dan b secara spasial di Maluku Utara menggunakan katalog gempa ANSS tahun 1963-2015 dengan metode maksimum likelihood, menghitung kemungkinan waktu terjadinya kembali gempa bumi merusak secara spasial, serta untuk menenentukan daerah-daerah yang sangat rawan berpotensi gempa merusak di wilayah Maluku Utara. Perhitungan nilai a dan b dari data ANSS untuk wilayah Maluku Utara menunjukkan besar nilai b adalah berkisar pada 0,75-1,5 dan nilai a adalah berkisar pada 6,5-10. Periode ulang gempa bumi untuk wilayah Maluku Utara dengan magnitude Mw = 6,5 adalah 3-19 tahun, gempa dengan magnitude Mw = 7 adalah 5-52 tahun, dan gempa dengan magnitude Mw = 7,5 adalah 15-140 tahun. Daerah-daerah yang berpotensi mengalami gempa bumi merusak adalah wilayah Laut Maluku, Ternate, Tidore, sebagian wilayah Kabupaten Halmahera Utara dan Barat, Pulau Kasiruta dan Pulau Obi. Kata kunci: nilai-b, seismisitas, maximum likelihood   ANALYSIS OF SEISMICITY LEVEL AND ROCKS FRAGILITY LEVEL IN NORTH MALUKU ABSTRACT A research has ben conducted to determine the seismicity level and rocks fragility level through spatially calculation of a  value and b value in North Maluku using ANSS earthquake catalog of years 1963-2015 with maximum likelihood method, spatially calculate possible time of  destructive earthquake recurrence, and to determine areas that highly prone to potentially destructive earthquake in North Maluku. A value and b value calculation of ANSS data of North Maluku region shows that b value is in the range of 0.75-1.5 and a value is in the range of 6.5-10. Earthquake repetition period of North Maluku region based on ANSS data with magnitude Mw = 6.5 is 3-19 years, for earthquake with magnitude Mw = 7 is 5-52 years and for earthquake with magnitude Mw = 7.5 is 15-140 years. Areas that potentially have destructive earthquake is Molucca Sea region, Ternate, Tidore, parts of North and West Halmahera District, Kasiruta Island and Obi Island. Keywords: b value, seismicity, maximum likelihood

scholarly journals Correlation Analysis of Spatial Distribution, Temporal Seismotectonics, and Return Period of Earthquake in East Nusa Tenggara, Indonesia

2019 ◽  
Vol 2019 ◽  
pp. 1-11
Author(s):  
Hery Leo Sianturi ◽  
Adi Susilo ◽  
Sunaryo ◽  
Sukir Maryanto
Keyword(s):  
Spatial Distribution ◽  
Return Period ◽  
B Value ◽  
Earthquake Catalog ◽  
Likelihood Methods ◽  
Small Magnitude ◽  
A Value ◽  
Maximum Likelihood Methods ◽  
High Level ◽  
Earthquake Data

This paper presents spatial distribution, temporal seismotectonics, and return period of earthquake in East Nusa Tenggara Province, Indonesia, using earthquake data and Maximum Likelihood methods. The data used are ISC, USGS/NEIC, and Indonesian Meteorology, Climatology and Geophysics Agency (IMCGA) earthquake catalog data for the period of 1918 to 2015. The results show that the a-value ranges from 5.0 to 8.5 and b-value ranges from 0.6 to 1.3. The pattern of spatial distribution of b-value is relatively low corresponding to the low of a-value, which means the high level of stress of rock in the area. The fractal dimension shows that the D value ranges from 1.384 to 1.874. The earthquake that occurred in East Nusa Tenggara Province was dominated by a small magnitude with great seismicity and the fastest return period is in Alor and Timor islands which is 44 days.

Reorganization of the Governmental Structure of Roumania

1931 ◽  
Vol 25 (3) ◽  
pp. 700-703
Author(s):  
Joseph S. Roucek
Keyword(s):  
Central Administration ◽  
World War ◽  
Liberal Party ◽  
Old Kingdom ◽  
The Balkans ◽  
History Of ◽  
The Will ◽  
The Law ◽  
Self Rule ◽  
The University

The law for the reorganization of central administration and the law on local administration (July 20, 1929) sponsored by the National Peasant government of Roumania have recently been put into effect. Both measures were drafted by Professors Negulescu, of the University of Bucharest, and Alexianu, of the University of Cernauţi. Their adoption comprises one of the most thorough governmental reforms in the history of the Balkans.The structure of the Roumanian government was, until very recently, almost completely copied from the French system. Roumania was a typical example of a unitary organization. The whole power of government was centralized in Bucharest. Practically all powers of local government were derived from the central authority, and were enlarged and contracted at the will of Bucharest. The whole system lent itself admirably to the domination of the National Liberal party, guided up to 1927 by Ion I. C. Brǎtianu, and after his death by his brother, Vintilǎ I. C. Brǎtianu, who died last year.Since the strength of the National Peasant party, which assumed the reins in 1928, lies largely in the provinces acquired at the close of the World War, a decentralization of government was to be expected. The bitter resentment of Maniu and his associates toward the over-centralization which favored the policies of the Bratianus forced the recent overhauling of the governmental structure, tending toward federalism—a form which takes cognizance of the differences of the past and present between the old kingdom and the new provinces and attempts to extend democratic features of self-rule to the electorate. At the same time, it attempts to secure bureaucratic expertness.

scholarly journals Effects of Camu-Camu (Myrciaria dubia) Powder on the Physicochemical and Kinetic Parameters of Deteriorating Microorganisms and Salmonella enterica Subsp. enterica Serovar Typhimurium in Refrigerated Vacuum-Packed Ground Beef

Agriculture ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 252
Author(s):  
Jorge Luiz da Silva ◽  
Vasco Cadavez ◽  
José M. Lorenzo ◽  
Eduardo Eustáquio de Souza Figueiredo ◽  
Ursula Gonzales-Barron
Keyword(s):  
Ground Beef ◽  
Treated Group ◽  
B Value ◽  
Kinetics Parameters ◽  
Psychrotrophic Bacteria ◽  
Color Changes ◽  
A Value ◽  
Spoilage Bacteria ◽  
Serovar Typhimurium ◽  
And Control

This study aims to evaluate the effects of camu-camu powder (CCP), Amazonian berry fruit with documented bioactive properties, physicochemical meat parameters, and the growth kinetics parameters of S. enterica ser. Typhimurium, psychrotrophic bacteria (PSY), and lactic acid bacteria (LAB) in vacuum-packed ground beef. Batches of ground beef were mixed with 0.0%, 2.0%, 3.5%, and 5.0% CCP (w/w), vacuum-packed as 10 g portions, and stored at 5 °C for 16 days. Centesimal composition analyses (only on the initial day), pH, TBARS, and color were quantified on storage days 1, 7, and 15, while PSY and LAB were counted on days 0, 3, 6, 9, 13, and 16. Another experiment was conducted with the same camu-camu doses by inoculating S. enterica ser. Typhimurium microbial kinetic curves were modeled by the Huang growth and Weibull decay models. CCP decreased TBARS in beef from 0.477 to 0.189 mg MDA·kg−1. No significant differences in meat pH between treated and control samples were observed on day 15. CCP addition caused color changes, with color a* value decreases (from 14.45 to 13.44) and color b* value increases (from 17.41 to 21.25), while color L* was not affected. Higher CCP doses caused progressive LAB growth inhibition from 0.596 to 0.349 log CFU·day−1 at 2.0% and 5.0% CCP, respectively. Similarly, PSY growth rates in the treated group were lower (0.79–0.91 log CFU·day−1) compared to the control (1.21 log CFU·day−1). CCP addition at any of the investigated doses produced a steeper S. enterica ser. Typhimurium inactivation during the first cold storage day, represented by Weibull’s concavity α shape parameter, ranged from 0.37 to 0.51, in contrast to 1.24 for the control. At the end of the experiment, however, S. enterica ser. Typhimurium counts in beef containing CCP were not significantly different (p < 0.05) from the control. Although CCP affects bacterial kinetics, it does not protect ground beef against spoilage bacteria and Salmonella to the same degree it does against lipid peroxidation.

Graduates giving back – a mentoring program for MBA students

2015 ◽  
Vol 4 (3) ◽  
pp. 200-212 ◽  
Author(s):  
Ann Darwin
Keyword(s):  
Higher Education ◽  
South Australia ◽  
Value Added ◽  
Master Of Business Administration ◽  
Mentoring Program ◽  
Education Students ◽  
Content Type ◽  
Mba Students ◽  
A Value ◽  
The University

Purpose – The purpose of this paper is to discuss the challenges and obstacles encountered in the implementation of a mentoring program for Master of Business Administration (MBA) students at the University of South Australia (UniSA) Business School. The paper starts with an exploration into the need for a mentoring program, the trial and subsequent four years of implementation. The paper also explores the network model of mentoring and the reasons why this, rather than a more traditional model, was chosen for the program’s implementation. Design/methodology/approach – This exploratory case study uses data from over 600 students and their alumni mentors over a five-year period to evaluate and improve the program as well as cultivating a critical community of adult learners. Findings – Feedback from students indicates that the mentoring program is regarded by most as a value-added feature of their early learning as it offers support, if and when it is required, from those who have been there before. Research limitations/implications – Results are limited to one institution. However, as research into mentoring for higher education students is thin on the ground, this study contributes to our understanding of the positive impacts of mentoring on student success. Practical implications – This paper emphasizes the importance of business leaders giving back to their alma mater through mentoring current MBA students. It shows how mentoring can support learning and management development. Originality/value – This is an original study which explores ways to increase the learning of higher education students for positive social outcomes.

Computational predictions for predicting the performance of steel 1 panel shear wall under explosive loads

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Aydin Shishegaran ◽  
Behnam Karami ◽  
Elham Safari Danalou ◽  
Hesam Varaee ◽  
Timon Rabczuk
Keyword(s):  
Steel Plate ◽  
Plate Thickness ◽  
Ensemble Model ◽  
Maximum Deflection ◽  
Explosive Load ◽  
Statistical Parameters ◽  
Content Type ◽  
A Value ◽  
Error Terms ◽  
Better Than

Purpose The resistance of steel plate shear walls (SPSW) under explosive loads is evaluated using nonlinear FE analysis and surrogate methods. This study uses the conventional weapons effect program (CONWEP) model for the explosive load and the Johnson-Cook model for the steel plate. Based on the Taguchi method, 25 samples out of 100 samples are selected for a parametric study where we predict the damaged zones and the maximum deflection of SPSWs under explosive loads. Then, this study uses a multiple linear regression (MLR), multiple Ln equation regression (MLnER), gene expression programming (GEP), adaptive network-based fuzzy inference (ANFIS) and an ensemble model to predict the maximum detection of SPSWs. Several statistical parameters and error terms are used to evaluate the accuracy of the different surrogate models. The results show that the cross-section in the y-direction and the plate thickness have the most significant effects on the maximum deflection of SPSWs. The results also show that the maximum deflection is related to the scaled distance, i.e. for a value of 0.383. The ensemble model performs better than all other models for predicting the maximum deflection of SPSWs under explosive loads. Design/methodology/approach The SPSW under explosive loads is evaluated using nonlinear FE analysis and surrogate methods. This study uses the CONWEP model for the explosive load and the Johnson-Cook model for the steel plate. Based on the Taguchi method, 25 samples out of 100 samples are selected for a parametric study where we predict the damaged zones and the maximum deflection of SPSWs under explosive loads. Then, this study uses a MLR, MLnER, GEP, ANFIS and an ensemble model to predict the maximum detection of SPSWs. Several statistical parameters and error terms are used to evaluate the accuracy of the different surrogate models. The results show that the cross-section in the y-direction and the plate thickness have the most significant effects on the maximum deflection of SPSWs. The results also show that the maximum deflection is related to the scaled distance, i.e. for a value of 0.383. The ensemble model performs better than all other models for predicting the maximum deflection of SPSWs under explosive loads. Findings The resistance of SPSW under explosive loads is evaluated using nonlinear FE analysis and surrogate methods. This study uses the CONWEP model for the explosive load and the Johnson-Cook model for the steel plate. Based on the Taguchi method, 25 samples out of 100 samples are selected for a parametric study where we predict the damaged zones and the maximum deflection of SPSWs under explosive loads. Then, this study uses a MLR, MLnER, GEP, ANFIS and an ensemble model to predict the maximum detection of SPSWs. Several statistical parameters and error terms are used to evaluate the accuracy of the different surrogate models. The results show that the cross-section in the y-direction and the plate thickness have the most significant effects on the maximum deflection of SPSWs. The results also show that the maximum deflection is related to the scaled distance, i.e. for a value of 0.383. The ensemble model performs better than all other models for predicting the maximum deflection of SPSWs under explosive loads. Originality/value The resistance of SPSW under explosive loads is evaluated using nonlinear FE analysis and surrogate methods. This study uses the CONWEP model for the explosive load and the Johnson-Cook model for the steel plate. Based on the Taguchi method, 25 samples out of 100 samples are selected for a parametric study where we predict the damaged zones and the maximum deflection of SPSWs under explosive loads. Then, this study uses a MLR, MLnER, GEP, ANFIS and an ensemble model to predict the maximum detection of SPSWs. Several statistical parameters and error terms are used to evaluate the accuracy of the different surrogate models. The results show that the cross-section in the y-direction and the plate thickness have the most significant effects on the maximum deflection of SPSWs. The results also show that the maximum deflection is related to the scaled distance, i.e. for a value of 0.383. The ensemble model performs better than all other models for predicting the maximum deflection of SPSWs under explosive loads.

scholarly journals Reflections on a measurement of the gravitational constant using a beam balance and 13 tons of mercury

2014 ◽  
Vol 372 (2026) ◽  
pp. 20140027 ◽  
Author(s):  
S. Schlamminger ◽  
R. E. Pixley ◽  
F. Nolting ◽  
J. Schurr ◽  
U. Straumann
Keyword(s):  
Gravitational Constant ◽  
Beam Balance ◽  
A Value ◽  
University Of Zurich ◽  
The University ◽  
Experimental Effort

In 2006, a final result of a measurement of the gravi- tational constant G performed by researchers at the University of Zürich, Switzerland, was published. A value of G =6.674252(122)×10 −11  m 3  kg −1  s −2 was obtained after an experimental effort that lasted over one decade. Here, we briefly summarize the measurement and discuss the strengths and weaknesses of this approach.

scholarly journals Bands in the secondary spectrum of hydrogen

1927 ◽  
Vol 114 (767) ◽  
pp. 293-313 ◽  
Keyword(s):  
Quantum Theory ◽  
Static Model ◽  
Moment Of Inertia ◽  
Initial Moment ◽  
A Value ◽  
Starting Point ◽  
Band Spectra ◽  
The University ◽  
Low Pressures ◽  
Complete Account

Fulcher’s discovery of bands in the secondary spectrum of hydrogen at low pressures proved the starting point of a number of investigations, including those, based on the valuable tables of Merton and Barratt, which have been carried out in the University of St. Andrews. The application of the quantum theory to these bands has been discussed by one of us (H. S. A.), by Curtis, and in particular by Richardson who, partly in association with Tanaka, has added greatly to the number of known regularities and done much to bring them into line with the theory of band spectra. Nevertheless, apart from the Fulcher system, of which Richardson has recently given a very complete account, there remains a very large number of lines which have not yet been classified. One of the present writers (I. S.) has been engaged in a study of the secondary spectrum at higher pressures, and among the regularities which have been selected by this method is a band with head at 4582·58 A. U. and shading towards the violet, which has been described in a recent communication. This band yielded an initial moment of inertia agreeing closely with a value deduced from a static model of triatomic hydrogen, H 3 . This band has since been found to be one of a large number of similar bands which it will be the purpose of this paper to describe. We shall refer to it for convenience as “Band II A , a .”

scholarly journals Universities under Pandemics of Management and COVID

Problemos ◽  
2020 ◽  
Vol 98 ◽  
pp. 107-112
Author(s):  
Jonas Dagys
Keyword(s):  
Academic Community ◽  
Academic Life ◽  
Effective Management ◽  
Unique Form ◽  
Community Based ◽  
University Development ◽  
A Value ◽  
Vilnius University ◽  
Societal Expectations ◽  
The University

The most urgent challenge of this year – the COVID-19 pandemic and measures of response to it – has sharpened and accelerated the process which was initially driven by bureaucratization and formalization: increasing depersonalization of academic life and the erosion of the university as a unique form of coexistence. The Assuming the concept of the university as a value category, this article aims to review and assess the changes in the self-perception of the academic community that have matured and acquired institutional forms in an attempt to adapt to rapidly shifting societal expectations and needs. Modern trends in university development are best expressed in terms such as “bureaucratization”, “formalization”, “depersonalization”, “instrumentalization of knowledge”, and “community fragmentation”. The pandemic of effective management that has affected Western universities and has gradually reached Vilnius University, no less than the pandemic of COVID-19 and administrative response to it, weakens the academic community based on autonomous and collegial decisions, which should be considered among the most important grounds of uniqueness of university as an institution.

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