bluuebunny/crossref_metadata_2025 huggingface dataset:
A coupled model study on the Atlantic Meridional Overturning Circulation under extreme atmospheric CO2 conditions
Authors: Rita Lecci  , Simona Masina  , Annalisa Cherchi  , Marcelo Barreiro
Published: June 2021

This study investigates the climate sensitivity to a strong CO2 atmospheric forcing focusing on the North Atlantic Ocean (NA). The analysis is based on a set of 600 years long experiments performed with a state-of-the-art coupled general circulation model (CGCM) with the 1990 reference value of atmospheric CO2 multiplied by 4, 8 and 16. Extreme increases in atmospheric CO2 concentration have been applied to force the climate system towards stable states with different thermo-dynamical properties and analyze how the different resulting oceanic stratification and diffusion affect the Atlantic Meridional Overturning Circulation (AMOC). The AMOC weakens in response to the induced warming with distinctive features in the extreme case: a southward shift of convective sites and the formation of a density front at mid-latitudes. The analysis of the density fluxes reveals that NA loses density at high latitudes and gains it southward of 40°N mainly due to the haline contribution. Our results indicate that the most important processes that control the AMOC are active in the high latitudes and are related to the stability of the water column. The increased ocean stratification stabilizes the ocean interior leading to a decreased vertical diffusivity, a reduction in the formation of deep water and a weaker circulation. In particular, the deep convection collapses mainly in the Labrador Sea as a consequence of the water column stratification under high latitudes freshening.
Relations between source parameters for large Persian earthquakes
Authors: Majid Nemati  , Mohammad Tatar
Published: June 2021

Empirical relationships for magnitude scales and fault parameters were produced using 436 Iranian intraplate earthquakes of recently regional databases since the continental events represent a large portion of total seismicity of Iran. The relations between different source parameters of the earthquakes were derived using input information which has usefully been provided from the databases after 1900. Suggested equations for magnitude scales relate the body-wave, surface-wave as well as local magnitude scales to scalar moment of the earthquakes. Also, dependence of source parameters as surface and subsurface rupture length and maximum surface displacement on the moment magnitude for some well documented earthquakes was investigated. For meeting this aim, ordinary linear regression procedures were employed for all relations. Our evaluations reveal a fair agreement between obtained relations and equations described in other worldwide and regional works in literature. The M0-mb and M0-MS equations are correlated well to the worldwide relations. Also, both M0-MS and M0-ML relations have a good agreement with regional studies in Taiwan. The equations derived from this study mainly confirm the results of the global investigations about rupture length of historical and instrumental events. However, some relations like MW-MN and MN-ML which are remarkably unlike to available regional works (e.g., American and Canadian) were also found.
Seismic monitoring by piezoelectric accelerometers of a damaged historical monument in downtown L’Aquila
Authors: Giuseppe Di Giulio  , Maurizio Vassallo  , Giosuè Boscato  , Alessandra Dal Cin  , Salvatore Russo
Published: June 2021

We show the preliminary seismic monitoring of a historical church in L’Aquila (central Italy), which was strongly damaged by the 2009 seismic sequence. This structure, S. Maria del Suffragio church, suffered the collapse of a great part of the dome during the April 6th 2009 Mw 6.1 earthquake. In this paper, recordings of ambient noise and local earthquakes have been analyzed. The seismic data were recorded by means of a dynamic monitoring system (19 mono-directional and 3 tri-directional piezoelectric accelerometers) and of two velocimeters, with all the instruments installed into the church. The aim of this research is the evaluation of the performance of the accelerometers of the monitoring system in case of low-amplitude vibrations. Simple techniques of analysis commonly employed in the seismic characterization of buildings have been applied. The reliability of the in-situ data was evaluated and the main modal parameters (natural frequencies and damping ratio) of the church were presented.
On the inclusion of data from solar cycle 19 to estimate F2 layer characteristic long term trends
Authors: Blas F. de Haro Barbas  , Ana G. Elias
Published: June 2021

The effect of including solar cycle 19 (1954-1964) in ionospheric trend estimation is assessed using experimental foF2 values. The dominant influence on the F2 layer is solar EUV radiation. In fact, around 90% of inter-annual variance of ionospheric parameters, such as foF2, is explained by solar EUV proxies such as the sunspot number, Rz, and solar radio flux at 10.7 cm, F10.7. This makes necessary to filter out solar activity effects prior to long term trends estimation, which is reduced at most to the remaining 10% variance. In general solar activity is filtered assessing the residuals of a linear regression between foF2 and Rz, or between foF2 and F10.7. Solar cycle 19 is a strong cycle during which Rz and F10.7 exceeded the values beyond which the ionosphere does not respond linearly to a further increase in EUV radiation. This effect, called saturation, implies a break down of the linearity between foF2 and EUV, and results in persistent negative residuals during this period. Since solar cycle 19 is at the beginning of the time series, trends result to be positive, or less negative, than trends without considering this period. In this case the filtering process is generating a “spurious” trend in the filtered data series which may lead to erroneous conclusions. hmF2 that do not present a saturation effect is also analyzed.

 
The autumn 1919 Torremendo (Jacarilla) earthquake series (SE Spain)
Authors: Josep Batlló  , José Manuel Martínez-Solares  , Ramon Macià  , Daniel Stich  , José Morales  , Lurdes Garrido
Published: June 2021

On 10th September 1919 several slightly damaging earthquakes struck the towns of Torremendo, Jacarilla (near Alicante, SE-Spain) and others nearby. Available magnitude estimations for the largest two events of the series are M = 5 approx. They were earthquakes of moderate size and they occurred in a region where similar magnitude earthquakes, thoroughly studied, occurred recently (1999 Mula; 2002 Bullas; 2005 La Paca; 2011 Lorca). This makes these events of interest for a better definition of the regional seismicity. We study their sources from the analysis of the available contemporary seismograms and related documents. A total of 23 seismograms from 9 seismic stations have been collected and digitized. These seismograms contain records for the two main events and several aftershocks of the earthquake series. Finally 44 files, corresponding to 44 recorded single component records from the different events have been processed. The events have been relocated and their magnitudes recalculated. Also, original macroseismic information for these events was recovered. A macroseismic evaluation of the series has been performed. Intensity data points have been recalculated and macroseismic location and magnitude obtained. We conclude that these are the largest earthquakes occurred in the region since the beginning of instrumental recording, with Mw = 5.5 for the largest shock, and that the available data could be compatible with a thrust mechanism related to blind faults in the Bajo Segura region.
Ionospheric parameter modelling and anomaly discovery by combining the wavelet transform with autoregressive models
Authors: Oksana V. Mandrikova  , Nadezda V. Fetisova (Glushkova)  , Riad Taha Al-Kasasbeh  , Dmitry M. Klionskiy  , Vladimir V. Geppener  , Maksim Y. Ilyash
Published: June 2021

The paper is devoted to new mathematical tools for ionospheric parameter analysis and anomaly discovery during ionospheric perturbations. The complex structure of processes under study, their a-priori uncertainty and therefore the complex structure of registered data require a set of techniques and technologies to perform mathematical modelling, data analysis, and to make final interpretations. We suggest a technique of ionospheric parameter modelling and analysis based on combining the wavelet transform with autoregressive integrated moving average models (ARIMA models). This technique makes it possible to study ionospheric parameter changes in the time domain, make predictions about variations, and discover anomalies caused by high solar activity and lithospheric processes prior to and during strong earthquakes. The technique was tested on critical frequency foF2 and total electron content (TEC) datasets from Kamchatka (a region in the Russian Far East) and Magadan (a town in the Russian Far East). The mathematical models introduced in the paper facilitated ionospheric dynamic mode analysis and proved to be efficient for making predictions with time advance equal to 5 hours. Ionospheric anomalies were found using model error estimates, those anomalies arising during increased solar activity and strong earthquakes in Kamchatka.
Relations between pressurized triaxial cavities and moment tensor distributions
Authors: Claudio Ferrari  , Maurizio Bonafede  , Elisa Trasatti
Published: June 2021

Pressurized cavities are commonly used to compute ground deformation in volcanic areas: the set of available solutions is limited and in some cases the moment tensors inferred from inversion of geodetic data cannot be associated with any of the available models. Two different source models (pure tensile source, TS and mixed tensile/shear source, MS) are studied using a boundary element approach for rectangular dislocations buried in a homogeneous elastic medium employing a new C/C++ code which provides a new implementation of the dc3d Okada fortran code. Pressurized triaxial cavities are obtained assigning the overpressure in the middle of each boundary element distributed over the cavity surface. The MS model shows a moment domain very similar to triaxial ellipsoidal cavities. The TS and MS models are also compared in terms of the total volume increment limiting the analysis to cubic sources: the observed discrepancy (~10%) is interpreted in terms of the different deformation of the source interior which provides significantly different internal contributions (~30%). Comparing the MS model with a Mogi source with the some volume, the overpressure of the latter must be ~37% greater than the former, in order to obtain the same surface deformation; however the outward expansion and the inner contraction separately differ by ~±10% and the total volume increments differ only by ~2%. Thus, the density estimations for the intrusion extracted from the MS model and the Mogi model are nearly identical.
Earthquake forecasting: statistics and information
Authors: Vladimir Gertsik  , Mark Kelbert  , Anatoly Krichevets
Published: June 2021

The paper presents a decision rule forming a mathematical basis of earthquake forecasting problem. We develop an axiomatic approach to earthquake forecasting in terms of multicomponent random fields on a lattice. This approach provides a method for constructing point estimates and confidence intervals for conditional probabilities of strong earthquakes under conditions on the levels of precursors. Also, it provides an approach for setting a multilevel alarm system and hypothesis testing for binary alarms. We use a method of comparison for different algorithms of earthquake forecasts in terms of the increase of Shannon information. ‘Forecasting’ (the calculation of the probabilities) and ‘prediction’ (the alarm declaring) of earthquakes are equivalent in this approach.
A high-resolution processing technique for improving the energy of weak signal based on matching pursuit
Authors: Shuyan Wang  , Yanchun Wang  , Chen Yu  , Xueqing Liu  , Bowen Yang
Published: June 2021

This paper proposes a new method to improve the resolution of the seismic signal and to compensate the energy of weak seismic signal based on matching pursuit. With a dictionary of Morlet wavelets, matching pursuit algorithm can decompose a seismic trace into a series of wavelets. We abstract complex-trace attributes from analytical expressions to shrink the search range of amplitude, frequency and phase. In addition, considering the level of correlation between constituent wavelets and average wavelet abstracted from well-seismic calibration, we can obtain the search range of scale which is an important adaptive parameter to control the width of wavelet in time and the bandwidth of frequency. Hence, the efficiency of selection of proper wavelets is improved by making first a preliminary estimate and refining a local selecting range. After removal of noise wavelets, we integrate useful wavelets which should be firstly executed by adaptive spectral whitening technique. This approach can improve the resolutions of seismic signal and enhance the energy of weak wavelets simultaneously. The application results of real seismic data show this method has a good perspective of application.
Tweeting after an earthquake: user localization and communication patterns during the 2012 Emilia seismic sequence
Authors: Francesca Comunello  , Lorenza Parisi  , Valentino Lauciani  , Federica Magnoni  , Emanuele Casarotti
Published: June 2021

The main goal of this paper is analysing how user’s location, relative to the epicenter of an earthquake, affects the different tweeting strategies adopted. For this purpose, we analyze a dataset of tweets that were generated around the 2012 Emilia earthquakes and that are geolocalized in Italy. In our analysis, we rely on existing literature on social media and natural disasters, considering literature exploring interactions and influence on Twitter, and literature focusing on the role of geolocalized user-generated information in disaster response.
Profiles of relative permittivity and electrical conductivity from unsaturated soil water content models
Authors: Roberta Porretta  , Fabio Bianchi
Published: June 2021

A mathematical model of water diffusion in the vadose zone has been implemented for different types of soil textures in order to determine the soil water content (SWC) profiles in dependence of depth and time. From these profiles, obtained for different soils, we derived the characteristic electrical parameters, such as relative permittivity (epsilonr) and electrical conductivity (sigma), and their variation in time, employing empirical relations available in the scientific literature. The simulation through mathematical models has been performed taking into account different types of soils characterized by the percentage composition of sand, clay and silt in the textural triangle, which provides some physical and chemical properties that affect the water retention in the soil. The resulting simulated profiles of SWC and consequently permittivity and conductivity profiles, span over a certain range of values suggesting the best techniques and the limits in geophysical investigation. Moreover this a-prior knowledge helps in the elaboration and interpretation of permittivity and conductivity data obtained by the measurements. Permittivity and conductivity profiles are particularly useful in some environmental applications when the soil textures are (or supposed to be) known as in the typical case of landfill leachate dispersion. Since the soil textures beneath or nearby a disposal waste are characterized by a SWC, the values of (epsilonr) and (sigma) at various depth can be directly inferred.
Cetacean behavioral responses to noise exposure generated by seismic surveys: how to mitigate better?
Authors: Clara Monaco  , Jesús M. Ibáñez  , Francisco Carrión  , L. Mario Tringali
Published: June 2021

Cetaceans use sound in many contexts, such as in social interactions, as well as to forage and to react in dangerous situations. Little information exists to describe how they respond physically and behaviorally to intense and long-term noise levels. Effects on cetaceans from seismic survey activities need to be understood in order to determine detailed acoustic exposure guidelines and to apply appropriated mitigation measures. This study examines direct behavioral responses of cetaceans in the southern Mediterranean Sea during seismic surveys with large airgun arrays (volume up to 5200 ci) used in the TOMO-ETNA active seismic experiment of summer 2014. Wide Angle Seismic and Multi-Channel Seismic surveys had carried out with refraction and reflection seismic methods, producing about 25,800 air-gun shots. Visual monitoring undertaken in the 26 daylights of seismic exploration adopted the protocol of the Joint Nature Conservation Committee. Data recorded were analyzed to examine effects on cetaceans. Sighting rates, distance and orientation from the airguns were compared for different volume categories of the airgun arrays. Results show that cetaceans can be disturbed by seismic survey activities, especially during particularly events. Here we propose many integrated actions to further mitigate this exposure and implications for management.
Down-hole geophysical characterization of middle-upper Quaternary sequences in the Apennine Foredeep, Mirabello, Italy
Authors: Luca Minarelli  , Sara Amoroso  , Gabriele Tarabusi  , Marco Stefani  , Gabriele Pulelli
Published: June 2021

The 2012 earthquakes sequence stroke a wide area of the alluvial plain in the Emilia-Romagna Region and triggered a new research interest on the role of the subsurface stratigraphic architecture and petrophysical property distribution in the modulation of the local seismic effects. Few direct shear wave velocity V_S data were however available below the depth of 50m. The only available V_S measurements were obtained from an anticline area, characterized by a reduced stratigraphic thickness and peculiar sedimentary facies, hardly representative of the majority of the alluvial plain subsurface. The study provides the first V_S profile available from middle-upper Quaternary successions deposited into a fast subsiding syncline area of the Apennine Foredeep Basin. The P-wave velocity V_P and the S-wave velocity V_S logs fill in the previous data gap on the geophysical parameters needed for the estimation of the local seismic response. Both V_P and V_S logs were continuously acquired to the depth of 265 m. The log records a velocity increase with depth, punctuated by sharp increases at some stratigraphic discordance surfaces. The value of 800 m/s that characterizes the “seismic bedrock”, as defined by the Italian building code [NTC 2008] was never reached at any depth. The investigated succession records a depositional evolution from deltaic-marine to alluvial plain conditions, punctuated by six glacio-eustatic depositional cycles, developed in Middle-Upper Quaternary times. The stratigraphic units described in the syncline log were correlated at a regional scale, with the thinner anticline succession of Mirandola. Correlatable units deposited into syncline and anticline areas reveal similar shear wave velocity values, supporting the regional extrapolation of the measured values.
The INGV real time strong motion data sharing during the 2016 Amatrice (central Italy) seismic sequence
Authors: Marco Massa  , Ezio D'Alema  , Chiara Mascandola  , Sara Lovati  , Davide Scafidi  , Gianlorenzo Franceschina  , Antonio Gomez  , Simona Carannante  , Davide Piccaredda  , Santi Mirenna  , Paolo Augliera
Published: June 2021

ISMD is the real time INGV Strong Motion database. During the recent August-September 2016 Amatrice, Mw 6.0, seismic sequence, ISMD represented the main tool for the INGV real time strong motion data sharing.  Starting from August 24th,  the main task of the web portal was to archive, process and distribute the strong-motion waveforms recorded  by the permanent and temporary INGV accelerometric stations, in the case of earthquakes with magnitude ≥ 3.0, occurring  in the Amatrice area and surroundings.  At present (i.e. September 30th, 2016), ISMD provides more than 21.000 strong motion waveforms freely available to all users. In particular, about 2.200 strong motion waveforms were recorded by the temporary network installed for emergency in the epicentral area by SISMIKO and EMERSITO working groups. Moreover, for each permanent and temporary recording site, the web portal provide a complete description of the necessary information to properly use the strong motion data.
Regional macroseismic field and intensity residuals of the August 24, 2016, Mw=6.0 central Italy earthquake
Authors: Valerio De Rubeis  , Paola Sbarra  , Patrizia Tosi
Published: June 2021

A macroseismic investigation of the August 24, 2016, Mw=6.0 Central Italy earthquake, was carried out through an online web survey. Data were collected through a macroseismic questionnaire available at the website www.haisentitoilterremoto.it, managed by the Istituto Nazionale di Geofisica e Vulcanologia (INGV). Over 12000 questionnaires were compiled soon after the seismic occurrence, coming from over 2600 municipalities. A statistical analysis was applied to the data collected in order to investigate the spatial distribution of intensity of the earthquake. The macroseismic intensity field (I) was described by identifying three main components: an isotropic component (II), a regional anisotropic component (IA) and a local random variations parameter (). The anisotropic component highlighted specific and well-defined geographical areas of amplification and attenuation. In general, the area between the Adriatic coast and Apennines Chain was characterized by an amplification of intensity, while the West side of the Apennines showed attenuation, in agreement with the domains found by other works focused on the analysis of instrumental data. Moreover, the regional macroseismic field showed similarities with instrumental PGA data. The results of our analysis confirm the reliability of web questionnaire data.
Seismic hazard in Central Italy and the 2016 Amatrice earthquake
Authors: Carlo Meletti  , Francesco Visini  , Vera D'Amico  , Andrea Rovida
Published: June 2021

The Amatrice earthquake of August 24th, 2016 (Mw 6.0) struck an area that in the national reference seismic hazard model (MPS04) is characterized by expected horizontal peak ground acceleration (PGA) with 10% probability of exceedance in 50 years higher than 0.25 g. After the occurrence of moderate-to-large magnitude earthquakes with a strong impact on the population, such as the L’Aquila 2009 and Emilia 2012 ones (Mw 6.1 and 5.9, respectively), possible underestimations of the seismic hazard by MPS04 were investigated, in order to analyze and evaluate the possible need for its update. One of the most common misunderstanding is to compare recorded PGA only with PGA with 10% probability of exceedance in 50 years. Moreover, by definition, probabilistic models cannot be validated (or rejected) on the basis of a single event. However, comparisons of forecasted shakings with observed data are useful for understating the consistency of the model. It is then worth highlighting the importance of these comparisons. In fact, MPS04 is the basis for the current Italian building code to provide the effective design procedures and, thus, any modification to the seismic hazard would also affect the building code.
In this paper, comparisons between recorded ground motion during the Amatrice earthquake and seismic hazard estimates are performed, showing that the observed accelerations are consistent with the values expected by the MPS04 model.
Instrumental seismicity of the Amatrice earthquake epicentral area: a review
Authors: Maria Grazia Ciaccio
Published: June 2021

This study presents a review of the instrumental seismicity of the Norcia-Amatrice area (central Italy) where a still on-going seismic sequence started on August 24th 2016 with a Mw6.0 earthquake.

The review is based on the analysis of the seismic catalogs 1981-2016, the CMT (Centroid Moment Tensor) solutions and the TDMT (Time Domain Moment Tensor) solutions, dividing the area into three regions based on the main seismic sequences preceding the Amatrice 2016 mainshock.

The seismicity of this region is characterized by different types of activity: single events, minor sequences and swarms with hypocenters within the upper 15 km of the crust. Small-magnitude seismic sequences on March 2007 with maximum Mw3.9, and one earthquake on March 2012, Mw37, not followed by significant seismicity, affected the area east of the Norcia, close to the Mw 5.4 aftershock of the Amatrice 2016 sequence. In the central area, near Accumoli, and in the southern sector close to Amatrice, minor seismic sequences occurred on February 2014 Ml3.5 and on November 2013 Mw3.7 respectively.

We integrated hypocentral locations and fault plane solutions to give a first look at the main features of the instrumental seismicity compared to the present seismic sequence in order to relate the seismicity patterns to seismogenic structures of this area of the central Italy.
The Effect of Audiovisual Learning System on Self-Efficacy and Critical Thinking Ability in Science Lessons on Human Digestive System Materials Science
Authors: Yasin Yasin , Syamsudin Abin , Arifin Daeng , Warta Waska
Published: June 2021

tudents' critical thinking ability in teaching and learning activities on human digestive system material is still low, where students are less skilled in collecting and analyzing data, relevant facts and identifying problems, so students have difficulty in solving problems with alternatives that fit the logic. Based on the results of the hypothetical test analysis obtained t hit > t daf (1.67), then accept. Hi means that there is an influence on the use of audiovisual learning media on critical thinking ability in human digestive system materials in grade VIII students of SMP Negeri 1 And SMP Negeri 2 Sindang Indramayu Regency. From the calculation of t test above obtained t count = 4,957 while t table at the level of trust 95% (significance 5%) with dk numerator is 1.70. Because t count (4,957) > t table (1,70) Hi accepted means there is an influence on the use of audiovisual learning media on self-efficacy in human digestive system materials in grade VIII students smp negeri 1 Filled And SMP Negeri 2 Sindang Indramayu. The result of this study is a description of the efficacy of students of grade VIII SMP Negeri 1 Filled And SMP Negeri 2 Sindang Indramayu Regency, by using audiovisual media learning system in human digestive system materials belongs to high category. There is an influence of audiovisual media learning system on self-efficacy on human digestive system materials in students VIII SMP Negeri 1 Filled And SMP Negeri 2 Sindang Indramayu.
Relações familiares entre binacionais em tempos de pandemia
Authors: Soares Mirelle Fernandes , Costa Nina Gabriela Borges
Published: June 2021

Este artigo objetiva analisar as relações familiares entre os binacionais em tempo de pandemia.Em razão das medidas de fechamento das fronteiras impostas pelos Estados a fim deminimizar a propagação do Covid-19, diversas famílias compostas por pessoas de nacionalidadesdistintas, sobretudo por não possuírem vínculos formais, ficaram privadas do convíviofamiliar. Esse estudo adotou a vertente metodológica jurídico-sociológica. Utiliza-se a técnicateórica por meio de análise de conteúdo bibliográfico, estudos às legislações de alguns paísesque tratam sobre o tema. Traça-se um conceito de aberto de família a partir do eixo afetivo,inclusive de alguns países ocidentais, bem como se confronta com o aspecto mercadológicoque as relações humanas são consideradas sob o viés globalizante e do capital. Contudo, considerandoo atual momento vivenciado, em que o medo da morte assola parte da população, emdecorrência da volatilidade na transmissão dos vírus, o ser humano tem repensado sobre suasrelações familiares, não pelo aspecto da consuntibilidade, mas sim pela afetividade. Estar com afamília promove estabilidade emocional, pois o ambiente familiar se torna lócus de segurança;porém, as políticas Estatais tolhem o convívio dessas famílias gerando danos existenciais.
Interaksi Sosial Masyarakat di Lingkungan Tempat Tinggal Penderita COVID-19
Authors: Muhammad  , Abu Ilham , Nikhlani Andi
Published: June 2021

The presence of COVID-19 can affect social interactions among the community, for example limiting themselves and their families to visit family and neighbor which they have been doing so far. This study aims to describe the social interactions that occur in communities where people with COVID-19 live. The design of this research is qualitative based on the social problems faced by the community during the COVID-19 pandemic. Research informants are people who live in RT. 27 Teluk Lerong Ulu Sub-district, Samarinda City and selected 5 people and the head of the local RT as key informants who could provide the necessary information through purposive sampling. Data collection techniques through interviews with informants and key informants using interview guidelines, observation and documentation. This research was conducted in March 2021. The data were analyzed through reduction, display, and conclusion. The results of the information research show that the social interactions that occur in people with COVID-19 sufferers are far from the cultural values ​​of the Indonesian people that have been going on so far. This can be caused by various factors such as incomplete public knowledge about COVID-19. Therefore, a local regional policy is needed to maximize the participation of community leaders such as the head of the local RT in providing complete information about COVID-19 to the people in their area. In addition, the role of the mass media is also needed in order to convey information to the wider community factually and reliably.
Adaptive control systems for solar collectors
Authors: Flor Unda Omar
Published: June 2021

En este trabajo se presentan las estrategias de control del flujo de aceite mediante la técnica de Control Predictivo basado en Modelo, para el mecanismo de control del campo de colectores solares cilindros parabólicos. Se analiza el comportamiento dinámico del sistema con el uso del modelo matemático, una técnicade control self-tunning y controlador predictivo basado en modelo para el control de plantas tipo ACUREX.

Keywords: Automation, Modernization, ControlLogix, Supervisory System, Mimic Panel.

References

[1]Arahal, M. R., Berenguel, M. & Camacho, E. F., 1997. Nonlinear neural model-based predictive control of a solar plant. In Proc. European Control Conf. ECC'97. Brussels, Belgium, Volumen TH-E I2, p. paper 264.

[2]Arahal, M. R., Berenguel, M. & Camacho, E. F., 1998a. Comparison of RBF algorithms for output temperature prediction of a solar plant.. In Proc. CONTROLO'98, 9-11 September.

[3]Arahal, M. R., Berenguel, M. & Camacho, E. F., 1998b. Neural identification applied to predictive control of solar plant. Control Engineering Practice, Volumen 6, pp. pp. 333-344.

[4]Aström, K. J. & Wittenmark, B., 1989. Adaptative Control. Aström, K. J. & Wittermark, B., 1984. Computed controlles Systems, Theory and Design. Englewood Cliffs, NJ: Prentice Hall.

[5]Barão, M., 2000. Dynamic and no-linear control of a solar collector field. Thesis (in Portuguese). Universidade Técnica de Lisboa, Instituto Superior Técnico.

[6]Barão, M., Lemos, J. M. & Silva, R. N., 2002. Reduced complexity adaptative nonlinear control of a distribuited collector solar field. J. of Process Control, Volumen 12(1), pp. pp. 131-141.

[7]Berenguel, M., Arahal, M. R. & Camacho, E. F., 1998. Modeling free responses of a solar plant for predictive control. Control Engineering Practice, Volumen 6, pp. pp. 1257-1266.

[8]Berenguel, M., Camacho, E. F. & Rubio, F. R., 1994. Simulation software package for the Acurex field.. Departamento de Ingeniería y Automática.

[9]Berenguel, M., Camacho, E. F. & Rubio, F. R., 1997. Advanced Control of Solar Plants. Londres: Springer-Verlag.
ANALYSIS OF SOME PHYSICAL AND CHEMICAL PROPERTIES OF YOGHURT WITH BIFIDOBACTERIUM IN BELARUS.
Authors: Podorozhniaya I. V. , Vetokhin S. S.
Published: June 2021

The values of freezing point, titratable and active acidities, conductivity, water activity, humidity, nonfat milk solids the of samples of market bioyoghurt were analyzed. They significantly differ from the same row milk indicators. So, they demonstrated lower values of freezing point, active acidity, water activity, humidity, and increased values of titratable acidity and conductivity, and nonfat milk solids. A large dispersion of the studied products’ properties was found for each manufacturer production as well as between producers. Yoghurts with Bifidobacterium that were produced at the Brest region had the highest values of рН, nonfat milk solids and lowest values of freezing point and humidity. This fact evidences the manufacturer has a well-established technological process for the production of bioyogurt and traceability of raw milk supply. The boundaries of the confidence intervals of physical and chemical properties both by individual manufacturers and jointly were determined. A close relationship between conductivity and freezing point in bioyoghurts of some manufacturers has been found. The dynamics of their changes in last years is traced.
Behandeling van spasticiteit met enkele overwegingen naar sport toe
Authors: DECLERCK K. , HEISTERCAMP F. , SLABBYNCK K. , BOSMANS A.
Published: June 2021

Treatment of spasticity with some considerations regarding sport

Spasticity is a possible side effect in patients with a central nervous system pathology and it affects more than 12 million people worldwide. Spasticity can have an important impact on the quality of life and sporting activities.

Spasticity only needs to be treated if there is spasticity associated pain and/or (expected) limited function. Primarily triggering factors of spasticity must be treated. A multidisciplinary approach containing a combination of medication and physical therapy is recommended in the treatment of spasticity. If this approach remains insufficient, interventional therapies can be taken into consideration, although they should always be combined with rehabilitation to reduce (the) spastic tone/spasticity.

Sports and exercising should not be merely seen in the context of therapy and/or rehabilitation but also as a crucial aspect of a healthy lifestyle, in particular for people ‘at risk’ for inactivity. Therefore, it is important to fill the gap between rehabilitation and sustainable sports practice for the rehabilitator.
Comparison of open and laparoscopic gastrectomy for gastric cancer: a low volume center experience
Authors: Yüksel Adem , Coşkun Murat , Taner Turgut Hamdi , Sümer Fatih
Published: June 2021

Objective: In gastric cancer, laparoscopic gastrectomy is commonly performed in Asian countries. In other regions where tumor incidence is relatively low and patient characteristics are different, developments in this issue have been limited. In this study, we aimed to compare the early results for patients who underwent open or laparoscopic gastrectomy for gastric cancer in a low volume center.

Material and Methods: We retrospectively analyzed the data of patients who underwent curative gastric resection (open gastrectomy n: 30; laparoscopic gastrectomy n: 30) by the same surgical team between 2014 and 2019.

Results: The tumor was localized in 60% (36/60) of the patients in the proximal and middle 1/3 stomach. In laparoscopic gastrectomy group, the operation time was significantly longer (median, 297.5 vs 180 minutes; p< 0.05). In open gastrectomy group, intraoperative blood loss (median 50 vs 150 ml; p< 0.05) was significantly higher. Tumor negative surgical margin was achieved in all cases. Although the mean number of lymph nodes harvested in laparoscopic gastrectomy group was higher than the open surgery group, the difference was not statistically significant (28.2 ± 11.48 vs 25.8 ± 9.78, respectively; p= 0.394). The rate of major complications (Clavien-Dindo ≥ grade 3) was less common in the laparoscopic group (6.7% vs 16.7%; p= 0.642). Mortality was observed in four patients (2 patients open, 2 patients laparoscopic).

Conclusion: In low-volume centers with advanced laparoscopic surgery experience, laparoscopic gastrectomy for gastric cancer can be performed with the risk of morbidity-mortality similar to open gastrectomy.
Transanal minimal invasive surgery (TAMIS): safety and feasibility for the resection of benign and malignant lesions of the rectum
Authors: Mehraj Asif , Saqib Najmus , Wani Rauf , Chowdri Nisar , Parray Fazl , Khan Mudassir
Published: June 2021

Objective:Radical surgery for rectal tumours has high morbidity. Local excision of such tumours can be achieved without compromising oncologic safety. However tumours that are not accessible to local excision can be approached using Transanal Minimal Invasive Surgery (TAMIS). The aim of our study was to assess feasibility of TAMIS procedure in terms of complications, operating time, resection margin positivity, hospital stay and local recurrence rate.

Material and Methods:Forty eight patients with benign adenomas or early stage adenocarcinoma, within 4 to 12 cm from anal verge who were subjected to TAMIS over a period of 3 years were included in the study. Short and long term outcomes were assessed.

Results:TAMIS was performed for 36 benign adenomas and 12 adenocarcinomas, which were located at an average distance of 6.2 cm from anal verge. The mean operating time was 72 minutes. There were no intraoperative complications.1 (2.08%) patient suffered post operative bleeding, which was managed conservatively. 2 (4.16%) patients developed acute urinary retention who required indwelling catheterisation. Resection margin was positive in 3 (6.25%) benign cases. Average hospital stay was 2.7 days. Local recurrence occurred in 2 (4.16%) villous adenoma patients (after 11 and 13 months), whereas in malignant patients there was no recurrence at a follow up period ranging between 12 to 36 months.

Conclusion:TAMIS is a safe and feasible procedure for benign tumours and early rectal cancers, located in low and middle rectum.
Retweet or reply? Covid-19 and Twitter. The case of the city of Bahía Blanca (Argentina)
Authors: Gutiérrez Emiliano , Meller Leandro , Virdis Juan Marcelo , De Simón Federico , Gurovich Carlos , Fernández Leyes Lucas
Published: June 2021

The unprecedented global context caused by COVID-19 has generated various changes in society and forced the governments of different countries to adopt containment measures. However, this crisis occurs in a globalized international context, where the mass use of various digital platforms allows the generation of a significant amount of information and the study of interactions between individuals. In this work, in particular, the impact on public opinion about the coronavirus crisis in the city of Bahía Blanca (Argentina) is analyzed from the Twitter digital platform, trying to identify the main actors in the production of messages, find out which users having a greater capacity to control its diffusion and measure the relevance or authority in the interactions analyzed using Social Network Analysis techniques. The main result is the fragmentation of information between individuals, being the resulting interaction scarce. On the other hand, it was found that in the analysis of retweets the main actors are not relevant outside the digital platform, while in the analysis of the responses the main actors are characterized by having a prominent role in the political scene or in communications locally.
Gender Differences in Spirituality and Marital Adjustment Among Single and Dual Earner Couples in Indian Society
Authors: Singh Raksha , Bahadur Anshubhi
Published: June 2021

The present study aimed to examine the gender differences in spirituality and marital adjustment among single and dual earner couples between 25 to 45 years of age range ( working couples= 100; male =50 and female=50, Single earner couples=100; working males=50, non-working females=50) . The total sample consisted of 200 participants. The Spirituality Scale developed by S S Haidari and Marital Adjustment Questionnaire ( MAQ ) developed by Kanchana Rohatgi and Pramod Kumar were used for collection of data.. Exploratory analyses and two way ANOVA was applied across gender and variables. Correlation analysis was conducted out in order to have a better understanding about the relationship between variables. Results indicate that women are better in spirituality than men, and dual earner female couples have higher mean scores in spirituality than other groups. Findings also reveal that there is no significant gender difference in marital adjustment among single and dual earner couples .And there is positive correlation between Spirituality and marital adjustment.
Speaking System for Mute Peoples
Authors: Nigde Jyoti , Parit Omkar , Parab Sagar , Shribahadurkar Dr. S. D. , Potdar Prof. D. P.
Published: June 2021

This interacting device is a microcontroller based system which is basically outline for lessening the communication space between dumb and normal people. This system can be accordingly configured to work as a “smart device”. In this paper, Atmega 328 microcontroller, voice module, LCD display and flex sensors are utilize. The device considered is basically residing of a glove and a microcontroller based system. Data gloves are used to detect the hand motion and microcontroller based system will interpret those few manoeuvre into human place voice. The data glove is furnished with four flex sensors placed on the glove. This system is helpful for dumb people and their hand manoeuvre will be converted into speech signal because of the date glove worn on the hands.
The Bloomsbury Reader on Islam in the West
Authors: Curtis   IV Edward E.
Published: June 2021

For more than a millennium, Islam has been a vital part of Western civilization. Today, however, it is sometimes assumed that Islam is a foreign element inside the West, and even that Islam and the West are doomed to be in perpetual conflict. The need for accurate, reliable scholarship on this topic has never been more urgent.

The Bloomsbury Reader on Islam in the West brings together some of the most important, up-to-date scholarly writings published on this subject. The Reader explores not only the presence of Muslim religious practitioners in Europe and the Americas but also the impact of Islamic ideas and Muslims on Western politics, societies, and cultures. It is ideal for use in the university classroom, with an extensive introduction by Edward E. Curtis IV and a timeline of key events in the history of Islam in the West. A brief introduction to the author and the topic is provided at the start of each excerpt.

Part 1, on the history of Islam in the West, probes the role of Muslims and the significance of Islam in medieval, early modern, and modern settings such as Islamic Spain, colonial-era Latin America, sixteenth-century France, nineteenth-century Crimea, interwar Albania, the post-World War II United States, and late twentieth-century Germany. Part 2 focuses on the contemporary West, examining debates over Muslim citizenship, the war on terrorism, anti-Muslim prejudice, and Islam and gender, while also providing readers with a concrete sense of how Muslims practise and live out Islamic ideals in their private and public lives.
Consuming Religion
Authors: Miller Vincent J.
Published: June 2021

Contemporary theology, argues Miller, is silent on what is unquestionably one of the most important cultural issues it faces: consumerism or “consumer culture.” While there is no shortage of expressions of concern about the corrosive effects of consumerism from the standpoint of economic justice or environmental ethics, there is a surprising paucity of theoretically sophisticated works on the topic, for consumerism, argues Miller, is not just about behavioral “excesses”; rather, it is a pervasive worldview that affects our construction as persons-what motivates us, how we relate to others, to culture, and to religion. Consuming Religion surveys almost a century of scholarly literature on consumerism and the commodification of culture and charts the ways in which religious belief and practice have been transformed by the dominant consumer culture of the West. It demonstrates the significance of this seismic cultural shift for theological method, doctrine, belief, community, and theological anthropology. Like more popular texts, the book takes a critical stand against the deleterious effects of consumerism. However, its analytical complexity provides the basis for developing more sophisticated tactics for addressing these problems.
A comparative study of the job functions of university and university of technology graduates and diplomates in special libraries and engineering firms
Authors:   , Rajagopaul Athena
Published: June 2021

This study investigated the job functions of university and university of technology graduates and diplomates in the staff structures of special libraries and engineering firms in KwaZulu-Natal. The objective of the study was to draw on possible trends and best practices in the latter for the Library and Information Services (LIS) work environment, as engineering like LIS draws its personnel from both traditional universities and universities of technology (UoT). Hence, the main target population for the study was university and UoT graduates and diplomates in special libraries and engineering firms in KZN. Graduates and diplomates were chosen for inclusion in the study using a census because of the smallness of the staff complements in these organizations. Two sets of self-administered questionnaires were distributed, one to graduates/diplomates and the other to employers in the selected organizations. Data collected was analysed using descriptive statistics and content analysis. Findings of the study revealed inconsistencies with the National Diploma: Library and Information Studies (ND: LIS) where these diplomates occupy paraprofessional as well as professional positions in special libraries whilst engineering graduates and diplomates tend to occupy job titles according to their highest academic qualifications. In both special libraries as well as in the engineering environment there is much task overlap and downshifting of job functions between paraprofessional and professional university and UoT graduates and diplomates. This study has revealed a valuable best practice from the engineering discipline for the LIS profession, which is that of professional registration. Professional registration of engineering staff with the Engineering Council of South Africa is a statutory requirement in the engineering profession and allows for the growth and development of those in the profession. It is recommended that the LIS profession, and the Library and Information Association of South Africa (LIASA) specifically, investigate a mechanism for professional registration of library and information workers.
PENGARUH PROFESIONALISME PADA PERTIMBANGAN TINGKAT MATERIALITAS DENGAN ETIKA PROFESI DAN KREDIBILITAS KLIEN SEBAGAI PEMODERASI
Authors: Luh Putri Mas Mirayani  , RR. Maria Yulia Dwi Rengganis
Published: June 2021

The aim purposes of this research to find empirical proof about the influence of profesionalism to materiality judegement and the influence of professional ethics and client credibility as moderating variables. Saturated sample method as the technique sampling. Data collection was done using questionnaires and dedicated to 86 auditors. Sample collections techniques use saturated samples. The number of respondents who filled out and returned the questionnaire in this study were 74 people. The analysis technique used in this study is Moderated Regression Analysis. The instruments have been examined for its validity and reliability. The model also has passed the classical assumptions of regression analysis. The result show that: (1) profesional ethics as moderating variable can’t moderate the inffluence of profesionalism to materiality judgement;and (2) credibility client as moderating variable can moderate the inffluence of profesionalism to materiality judgement.