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Search Results: 1 - 10 of 8981 matches for " Silvia Nittel "
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A Survey of Geosensor Networks: Advances in Dynamic Environmental Monitoring
Silvia Nittel
Sensors , 2009, DOI: 10.3390/s90705664
Abstract: In the recent decade, several technology trends have influenced the field of geosciences in significant ways. The first trend is the more readily available technology of ubiquitous wireless communication networks and progress in the development of low-power, short-range radio-based communication networks, the miniaturization of computing and storage platforms as well as the development of novel microsensors and sensor materials. All three trends have changed the type of dynamic environmental phenomena that can be detected, monitored and reacted to. Another important aspect is the real-time data delivery of novel platforms today. In this paper, I will survey the field of geosensor networks, and mainly focus on the technology of small-scale geosensor networks, example applications and their feasibility and lessons learnt as well as the current research questions posed by using this technology today. Furthermore, my objective is to investigate how this technology can be embedded in the current landscape of intelligent sensor platforms in the geosciences and identify its place and purpose.
Geosensor Data Representation Using Layered Slope Grids
Yongmi Lee,Young Jin Jung,Kwang Woo Nam,Silvia Nittel,Kate Beard,Keun Ho Ryu
Sensors , 2012, DOI: 10.3390/s121217074
Abstract: Environmental monitoring applications are designed for supplying derived and often integrated information by tracking and analyzing phenomena. To determine the condition of a target place, they employ a geosensor network to get the heterogeneous sensor data. To effectively handle a large volume of sensor data, applications need a data abstraction model, which supports the summarized data representation by encapsulating raw data. For faster data processing to answer a user’s queries with representative attributes of an abstracted model, we propose such a data abstraction model, the Layered Slopes in Grid for Sensor Data Abstraction (LSGSA), which is based on the SGSA. In a single grid-based layer for each sensor type, collected data is represented by slope directional vectors in two layered slopes, such as height and surface. To answer a user query in a central monitoring server, LSGSA is used to reduce the time needed to extract event features from raw sensor data as a preprocessing step for interpreting the observed data. The extracted features are used to understand the current data trends and the progress of a detected phenomenon without accessing raw sensor data.
Correction: Lee, Y. et al. Geosensor Data Representation Using Layered Slope Grids. Sensors 2012, 12, 17074-17093
Yongmi Lee,Young Jin Jung,Kwang Woo Nam,Silvia Nittel,Kate Beard,Keun Ho Ryu
Sensors , 2013, DOI: 10.3390/s130405404
Abstract: There are four mistakes at the table derived from the (c) surface slope of Figure 4 in [1]. The direction numbers are derived according to (a) slope directions. The overall direction number should be changed from 6 to 4. The distinct direction number between the 1st and 2nd subcells should be changed from 0 to 8. The distinct direction number between the 2nd and 3rd subcells should be changed from 8 to 4. The distinct direction number between the 3rd and 4th subcells should be changed from 4 to 6. The authors would like to apologize for any inconvenience this may have caused to the readers of this journal.
Design of Sensor Data Processing Steps in an Air Pollution Monitoring System
Young Jin Jung,Yang Koo Lee,Dong Gyu Lee,Yongmi Lee,Silvia Nittel,Kate Beard,Kwang Woo Nam,Keun Ho Ryu
Sensors , 2011, DOI: 10.3390/s111211235
Abstract: Environmental monitoring is required to understand the effects of various kinds of phenomena such as a flood, a typhoon, or a forest fire. To detect the environmental conditions in remote places, monitoring applications employ the sensor networks to detect conditions, context models to understand phenomena, and computing technology to process the large volumes of data. In this paper, we present an air pollution monitoring system to provide alarm messages about potentially dangerous areas with sensor data analysis. We design the data analysis steps to understand the detected air pollution regions and levels. The analyzed data is used to track the pollution and to give an alarm. This implemented monitoring system is used to mitigate the damages caused by air pollution.
The Challenge of UNASUR Member Countries to Replace ICSID Arbitration  [PDF]
Silvia Karina Fiezzoni
Beijing Law Review (BLR) , 2011, DOI: 10.4236/blr.2011.23014
Abstract: In the 2000s, the financial crisis in Argentina and several nationalizations carried out by governments in South America have spawned a large number of claims before International Centre for Settlement of Investment Disputes (ICSID). Latin Americans began to look at ICSID critically, there have been complaints about ICSID's connections with the World Bank; non-commercial interests, such as health or environmental protection, have not received adequate attention in the arbitration cases; a lack of transparency by arbitration panels; and the absence of an appeals process, but only a limited annulment procedure. This situation generates impacts upon the overall due process of ICSID arbitrations and Latin American hostility against ICSID, such the Bolivarian Alliance for the Peoples of our America Peoples'Trade Treaty (ALBA-TCP) Declaration to denounce ICSID Convention and the firm intention of Union of South American Nations (UNASUR) countries to create a regional arbitration centre to replace ICSID arbitration.
On the Relativistic Stars  [PDF]
Silvia Morales, Roberto Aquilano
Journal of Modern Physics (JMP) , 2012, DOI: 10.4236/jmp.2012.34046

? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ??Announcement from Editorial Board

The following article has been retracted due to plagiarism. This paper published in Vol.3 No.4, April 2012, has been removed from this site.

Title: On the Relativistic Stars

Author: Silvia Morales, Roberto Aquilano

It has been brought to our attention that this paper appears exactly as it was published in Astroparticle Physics, vol. 32, 2009, 153. (\"On the nature of relativistic stars\" by Silvia Morales, Alejandra Zorzi, Roberto Aquilano)

Consequently, this paper has been retracted by Journal of Modern Physics.

? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?JMP Editorial Board

? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?April 30, 2015

Use of Alternative and Complementary Medicine by Old Italians Adults: The Determinant of Choice  [PDF]
Silvia Platania, Giuseppe Santisi
Open Journal of Social Sciences (JSS) , 2015, DOI: 10.4236/jss.2015.37042
Abstract: Complementary and alternative medicine (CAM) is the term for medical products and practices that aren’t part of standard care. Although using complementary and alternative medicines (CAM) is becoming increasingly prevalent in Italy, research in complementary and alternative therapy in older adults is limited. This study investigates the predictors and the determinant of choice of using complementary and alternative medicine (CAM) in older adult consumers [1]-[3]. The sample consisted of 150 Italian older consumers who used alternative medicine in the last year. The older adults interviewed were 52 males (34.7%) and 98 females (65.3%) and the average age was 65.4 (SD = 0.76). The results of this study showed a strong dissatisfaction of respondents with the tra-ditional medical treatments because the alternative’s medicine treatments are considered more invasive.
Phonons near Peierls Structural Transition in Quasi-One-Dimensional Organic Crystals of TTF-TCNQ  [PDF]
Silvia Andronic, Anatolie Casian
Advances in Materials Physics and Chemistry (AMPC) , 2016, DOI: 10.4236/ampc.2016.64010
Abstract: The Peierls structural transition in quasi-one-dimensional organic crystals of TTF-TCNQ is investigated in the frame of a more complete physical model. The two most important electron-phonon interaction mechanisms are taken into account simultaneously. One is similar of that of deformation potential and the other is of polaron type. For simplicity, the 2D crystal model is considered. The renormalized phonon spectrum and the phonon polarization operator are calculated in the random phase approximation for different temperatures. The effects of interchain interaction on renormalized acoustic phonons and on the Peierls critical temperature are analyzed.
Metal-Insulator Transition of Peierls Type in Quasi-One-Dimensional Crystals of TTT2I3  [PDF]
Silvia Andronic, Anatolie Casian
Advances in Materials Physics and Chemistry (AMPC) , 2017, DOI: 10.4236/ampc.2017.75017
Abstract: We investigate the metal-insulator transition in quasi-one-dimensional organic crystals of tetrathiotetracene-iodide, TTT2I3, in the 2D model. A crystal physical model is applied which takes into account two the most important hole-phonon interaction mechanisms. One is similar to that of deformation potential and the other is of polaron type. The scattering on defects is also considered and it is crucial for the explanation of the transition. The phonon polarization operator and the renormalized phonon spectrum are calculated in the random phase approximation for different temperatures applying the method of Green functions. We show that the transition is of Peierls type. The effect of lattice distortion on the dispersion of renormalized acoustic phonons is analyzed.
A general multivariate latent growth model with applications in student careers Data warehouses
Silvia Bianconcini,Silvia Cagnone
Statistics , 2009, DOI: 10.3102/1076998610396886
Abstract: The evaluation of the formative process in the University system has been assuming an ever increasing importance in the European countries. Within this context the analysis of student performance and capabilities plays a fundamental role. In this work we propose a multivariate latent growth model for studying the performances of a cohort of students of the University of Bologna. The model proposed is innovative since it is composed by: (1) multivariate growth models that allow to capture the different dynamics of student performance indicators over time and (2) a factor model that allows to measure the general latent student capability. The flexibility of the model proposed allows its applications in several fields such as socio-economic settings in which personal behaviours are studied by using panel data.
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