scholarly journals The Hellenic Open University Cosmic Ray Telescope: Research and Educational Activities

2018 ◽  
Vol 182 ◽  
pp. 02072 ◽  
Author(s):  
A. Leisos ◽  
T. Avgitas ◽  
G. Bourlis ◽  
G.K. Fanourakis ◽  
I. Gkialas ◽  
...  
Keyword(s):  
Cosmic Ray ◽  
Open University ◽  
University Campus ◽  
Air Showers ◽  
Educational Activities ◽  
Rf Antennas ◽  
Primary Particles ◽  
Plastic Scintillators ◽  
The University ◽  
The City

The Hellenic Open University Cosmic Ray Telescope consists of three autonomous stations installed at the University Campus in the city of Patras. Each station comprises three large (≈ 1 m2) plastic scintillators and one or more Codalema type RF antennas detecting Extensive Air Showers (EAS), originating from primary particles with energy greater than 10 TeV. The operation and the performance of the Telescope is presented briefly, emphasising the educational activities foreseen in the framework of the HEllenic LYceum Cosmic Observatories Network (HELYCON).

scholarly journals Studies for high energy air shower identification using RF measurements with the ASTRONEU array

2019 ◽  
Vol 210 ◽  
pp. 05010 ◽  
Author(s):  
Stavros Nonis ◽  
George Bourlis ◽  
Ioannis Gkialas ◽  
Antonios Leisos ◽  
Ioannis Manthos ◽  
...  
Keyword(s):  
Transfer Functions ◽  
Cosmic Ray ◽  
High Energy ◽  
Open University ◽  
University Campus ◽  
Air Shower ◽  
Rf Antennas ◽  
Single Antenna ◽  
Rf Signals ◽  
Scintillator Detectors

The Hellenic Open University (HOU) Cosmic Ray Telescope (ASTRONEU) consists of 9 large scintillator detectors and 3 RF antennas arranged in three autonomous stations operating at the Hellenic Open University campus in the city of Patras. High energy showers that are detected simultaneously by two distant stations and in coincidence with the RF antennas are used to study the RF signature of cosmic events. In previous studies we have shown that the timing of the RF signals as well as the measured electric field at the antennas position are in very good agreement with the simulation predictions. In this work we concentrate on the transfer functions of the antennas which are strongly frequency and angular dependent. We show that the RF spectra (at frequencies 30-80 MHz) of the detected showers are exhibiting features of the antenna response as predicted by detailed Monte Carlo simulation suggesting that a single antenna RF spectrum gives access to the cosmic ray arrival direction.

Distribution of arrival times in cosmic ray showers

1978 ◽  
Vol 10 (4) ◽  
pp. 730-735
Author(s):  
H. S. Green
Keyword(s):  
Cosmic Radiation ◽  
Three Dimensional ◽  
Stochastic Theory ◽  
Cosmic Ray ◽  
Time Of Arrival ◽  
Air Showers ◽  
Actual Distribution ◽  
Arrival Times ◽  
Primary Particles ◽  
Theoretical Analyses

The theoretical analyses of the extensive air showers developing from the cosmic radiation has its origins in the work of Carlson and Oppenheimer (1937) and Bhabha and Heitler (1937), at a time when it was thought that such showers were initiated by electrons. The realization that protons and other nuclei were the primary particles led to a reformulation of the theory by Heitler and Janossy (1949), Messel and Green (1952) and others, in which the production of energetic pions and the three-dimensional development of air showers were accounted for. But as the soft (electromagnetic) component of the cosmic radiation is the most prominent feature of air showers at sea level, there has been a sustained interest in the theory of this component. Most of the more recent work, such as that by Butcher and Messel (1960) and Thielheim and Zöllner (1972) has relied on computer simulation; but this method has disadvantages in terms of accuracy and presentation of results, especially where a simultaneous analysis of the development of air showers in terms of several physical variables is required. This is so for instance when the time of arrival is one of the variables. Moyal (1956) played an important part in the analytical formulation of a stochastic theory of cosmic ray showers, with time as an explicit variable, and it is essentially this approach which will be adopted in the following. The actual distribution of arrival times is cosmic ray showers, for which results are obtained, is of current experimental interest (McDonald, Clay and Prescott (1977)).

scholarly journals Delta Project, Towards a Sustainable Campus

2018 ◽  
Author(s):  
Héctor Hugo ◽  
Felipe Espinoza ◽  
Ivetheyamel Morales ◽  
Elías Ortiz ◽  
Saúl Pérez ◽  
...  
Keyword(s):  
City Council ◽  
Business Community ◽  
University Campus ◽  
Living Lab ◽  
Working Groups ◽  
Area Of Influence ◽  
External Actors ◽  
The University ◽  
The City ◽  
The Town

The University of Guayaquil, which shares the same name as the city where it is located, faces the challenge of transforming its image for the XXI century. It was deemed necessary to identify details about the urban evolution of the historic link with the city, in relation to the changes produced by the project’s siting and its direct area of influence. The goal is to integrate the main university campus within a framework which guarantees sustainability and allows innovation in the living lab. To achieve this, the action research method was applied, focused on participation and the logic framework. For the diagnosis, proposal, and management model, integrated working groups were organized with internal users such as professors, students, and university authorities, and external actors such as residents, the local business community, Guayaquil city council, and the Governorate of Guayas. As result of the diagnosis, six different analysis dimensions were established which correspond to the new urban agenda for the future campus: compactness, inclusiveness, resilience, sustainability, safety and participation. As a proposal, the urban design integrates the analysis dimensions whose financing and execution are given by the Town Hall, at the same time the Governorate integrates the campus with its network of community police headquarters.

Investigating the Characteristics of Longitudinal Profile of Primary Particles in Extensive Air Showers

2015 ◽  
Vol 754-755 ◽  
pp. 859-864
Author(s):  
A.A. Al-Rubaiee ◽  
Uda Hashim ◽  
Mohd Khairuddin Md Arshad ◽  
A. Rahim Ruslinda ◽  
R.M. Ayub ◽  
...  
Keyword(s):  
Charged Particles ◽  
Cosmic Ray ◽  
Primary Energy ◽  
Extensive Air Showers ◽  
Air Showers ◽  
Longitudinal Development ◽  
Extensive Air Shower ◽  
Primary Particles ◽  
Shower Maximum ◽  
Hadronic Model

One of the characteristics of longitudinal development of extensive air showers is the number of charged particles and depth of shower maximum in extensive air showers as a function of primary energy, which is often used to reconstruct the elemental composition of primary cosmic rays. Studying of extensive air shower characteristics was performed by investigating the longitudinal development parameters depending on Heitler model for different primary particles. The simulation of the number of charged particles and depth of shower maximum (NandXmax) in extensive air showers of particle cascades was performed using AIRES code for SIBYLL hadronic model for different primary particles like electron, positron, gamma quanta and iron nuclei at the energy range 1014-1019eV. The comparison between the simulated longitudinal development ofNandXmaxusing SIBYLL hadronic model with two hadronic models (QGSJET99 ans SIBYLL16) has shown an opportunity for determination of cosmic ray cascade interactions in extensive air showers.

scholarly journals Demonstrating of Cosmic Ray Characteristics by Estimating the Cherenkov Light Lateral Distribution Function for Yakutsk Array as a Function of the Zenith Angle

2016 ◽  
Vol 67 ◽  
pp. 21-30
Author(s):  
Marwah M. Abdulsttar ◽  
A.A. Al-Rubaiee ◽  
Abdul Halim K. Ali
Keyword(s):  
Numerical Simulation ◽  
Distribution Function ◽  
Zenith Angle ◽  
Cosmic Ray ◽  
Primary Energy ◽  
Lateral Distribution ◽  
Cherenkov Light ◽  
Air Showers ◽  
Lateral Distribution Function ◽  
Primary Particles

Cherenkov light lateral distribution function (CLLDF) in Extensive Air Showers (EAS) for different primary particles (e-, n , p, F, K and Fe) was simulated using CORSIKA code for conditions and configurations of Yakutsk EAS array with the fixed primary energy 3 PeV around the knee region at different zenith angles. Basing on the results of CLLDF numerical simulation, sets of approximated functions are reconstructed for different primary particles as a function of the zenith angle. A comparison of the parametrized CLLDF with that simulated with Yakutsk EAS array is verified.The parameterized CLLDF also is compared with that measured on the Yakutsk EAS array.

scholarly journals Research on Sponge Campus Application Based on Low Impact Development Measures--A Case Study of Wuhan Polytechnic University

2019 ◽  
Vol 118 ◽  
pp. 04021
Author(s):  
Jingjing Liu ◽  
Haoyu Zhang
Keyword(s):  
Environmental Protection Agency ◽  
Rainwater Harvesting ◽  
Low Impact Development ◽  
System Model ◽  
University Campus ◽  
Artificial Lake ◽  
Planning And Construction ◽  
The University ◽  
The City ◽  
Swmm Model

In recent years, China has vigorously promoted the construction of sponge cities and achieved good results. The university campus is a relatively independent existence in the city. Due to historical planning and construction reasons, it is easy to accumulate water when the city has a large amount of precipitation. Taking Wuhan Polytechnic University as an example, this paper analyzes the causes of waterlogging on campus from the aspects of urban precipitation, campus planning, rainwater harvesting and utilization, and proposes a series of low-impact development (LID) measures, such as increasing the permeability of paving area, building vegetative ditch, setting up infiltration green belt, and renovating the artificial lake in the school. The author adopted the SWMM model of urban stormwater management developed by the U.S.EPA as a carrier to construct a low-impact rainwater system model, The SWMM model which funded by the US Environmental Protection Agency was used to construct a low-impact development rainwater system model to evaluate the effect of low-impact development measures on ground runoff control.

Response of Plastic Scintillators to Cosmic Ray Air Showers

1965 ◽  
Vol 36 (5) ◽  
pp. 587-591 ◽  
Author(s):  
A. D. Bray ◽  
D. F. Crawford ◽  
D. L. Jauncey ◽  
C. B. A. McCusker ◽  
D. Melley ◽  
...  
Keyword(s):  
Cosmic Ray ◽  
Air Showers ◽  
Plastic Scintillators

Computer simulations of cosmic-ray air showers II. Showers initiated by heavy primary particles

1974 ◽  
Vol 339 (1617) ◽  
pp. 157-170 ◽  
Keyword(s):  
Computer Simulations ◽  
Primary Particle ◽  
Cosmic Ray ◽  
High Energy ◽  
Air Showers ◽  
Heavy Particles ◽  
Longitudinal Development ◽  
Energy Interaction ◽  
Precise Knowledge ◽  
Primary Particles

Computer simulations have been made of large extensive air showers initiated by nuclei heavier than protons. The work forms part of a study of future experiments designed to identify the nature of the energetic primary particles. A model based upon data from nuclear emulsion experiments has been used to represent the break-up of the primary nuclei in collision with air nuclei. Differences in shower characteristics are predicted which are dependent upon the choice of model for the fragmentation of the primary nucleus and its energy. The major cause of fluctuations in the longitudinal development of showers produced by heavy particles is shown to be the pattern of the fragmentation of the incident nucleus. In the absence of a precise knowledge of the high-energy interaction, we have not identified any parameter in large showers which, if measurable and averaged over many showers, will reflect strongly the nature of the primary particle.

scholarly journals Study of Cherenkov light lateral distribution function around the knee region in extensive air showers

2015 ◽  
pp. 79-85
Author(s):  
A. Al-Rubaiee ◽  
U. Hashim ◽  
M. Marwah ◽  
Y. Al-Douri
Keyword(s):  
Distribution Function ◽  
Cherenkov Radiation ◽  
Cosmic Ray ◽  
Primary Energy ◽  
Lateral Distribution ◽  
Cherenkov Light ◽  
Air Showers ◽  
Knee Region ◽  
Lateral Distribution Function ◽  
Primary Particles

The Cherenkov light lateral distribution function (LDF) was simulated with the CORSIKAcode in the energy range (1013 - 1016) eV. This simulation was performed for conditions and configurations of the Tunka EAS Cherenkov array for the two primary particles (p and Fe). Basing on the simulated results, many approximated functions are structured for two primary particles and different zenith angles. This allowed us to reconstruct the EAS events, which is, to determine the type and energy of the primary particles that produced showers from signal amplitudes of Cherenkov radiation measured by the Tunka Cherenkov array experiment. Comparison of the calculated LDF of Cherenkov radiation with that measured at the Tunka EAS array shows the ability to identify the primary particle that initiated the EAS cascades by determining its primary energy around the knee region of the cosmic ray spectrum.

scholarly journals The Campus of the University of Brasilia

2010 ◽  
pp. 44-47
Author(s):  
Andrey Rosenthal Schlee
Keyword(s):  
University Campus ◽  
The University ◽  
The City

The Pilot Plan of the new Brazilian Federal Capital, by Lúcio Costa, was selected in a public competition held in 1957. The city was inaugurated barely three years later by President Juscelino Kubitschek, in April 1960, when the official creation of the University of Brasilia became a reality. Preparing to celebrate fifty years of existence, the University campus probably represents the most accomplished set of Brutalist architecture in the country and an excellent sample of the inventive resources of Brazilian architects. A functionalist city inside another. They are distinct from each other, but both dignified and worthy of documentation and preservation actions.

Sign in / Sign up

Export Citation Format

Share Document