scholarly journals TIME-OF-NIGHT VARIATION OF SOLAR NEUTRINOS

1998 ◽  
Vol 13 (24) ◽  
pp. 1915-1922 ◽  
Author(s):  
MOHAN NARAYAN ◽  
G. RAJASEKARAN ◽  
RAHUL SINHA
Keyword(s):  
Solar Neutrino ◽  
Analytical Method ◽  
Solar Neutrinos ◽  
Neutrino Detectors ◽  
The Earth

We investigate the time-of-night variation of solar neutrino rate which will be of relevance to super-Kamioka and Sudbury neutrino detectors in the framework of oscillations among the three flavors. An analytical method of computing the regeneration in the earth is presented. If day–night effect is seen, we show how the study of the time-of-night variation will allow the determination of the neutrino parameters.

scholarly journals REVIEW OF SOLAR NEUTRINO EXPERIMENTS

2004 ◽  
Vol 19 (08) ◽  
pp. 1167-1179 ◽  
Author(s):  
A. BELLERIVE
Keyword(s):  
Solar Neutrino ◽  
Solar Neutrinos ◽  
Solar Model ◽  
Neutrino Mixing ◽  
Model Calculations ◽  
Electron Neutrinos ◽  
Mixing Parameters ◽  
The Earth ◽  
Neutrino Experiments ◽  
Good Agreement

This paper reviews the constraints on the solar neutrino mixing parameters with data collected by the Homestake, SAGE, GALLEX, Kamiokande, SuperKamiokande, and SNO experiments. An emphasis will be given to the global solar neutrino analyses in terms of matter-enhanced oscillation of two active flavors. The results to-date, including both solar model dependent and independent measurements, indicate that electron neutrinos are changing to other active types on route to the Earth from the Sun. The total flux of solar neutrinos is found to be in very good agreement with solar model calculations. Future measurements will focus on greater accuracy for mixing parameters and on better sensitivity to low neutrino energies.

NEUTRINOS FROM SUPERNOVA EXPLOSION AND THE MIKHEYEV-SMIRNOV-WOLFENSTEIN EFFECT

1987 ◽  
Vol 02 (11) ◽  
pp. 827-834 ◽  
Author(s):  
HISAKAZU MINAKATA ◽  
HIROSHI NUNOKAWA ◽  
KIYOSHI SHIRAISHI ◽  
HIROSHI SUZUKI
Keyword(s):  
Solar Neutrino ◽  
Supernova Explosion ◽  
Mixing Angles ◽  
Neutrino Detectors ◽  
Electron Neutrinos ◽  
The Earth

It is shown that by taking the effect of the Earth into account the possible observation of electron neutrinos from the supernova SN1987A at the Kamiokande II is compatible with the solution of the solar neutrino puzzle by the Mikheyev-Smirnov-Wolfenstein mechanism. Our scenario requires relatively large mixing angles sin 2 2θ ≳ 0.3 and, most probably, ∆m2 of the order of 10−6 ~ 10−5 (eV) 2. The implications of possible observation in other neutrino detectors are briefly discussed.

STATUS OF BOREXINO

2003 ◽  
Vol 18 (22) ◽  
pp. 3895-3907
Author(s):  
◽  
ALDO IANNI
Keyword(s):  
Solar Neutrino ◽  
Count Rate ◽  
Large Scale ◽  
New Technology ◽  
Neutrino Flux ◽  
Solar Neutrinos ◽  
Neutrino Detector ◽  
The Earth ◽  
The Status ◽  
High Level

Borexino is a real-time solar neutrino detector under commissioning at the Gran Sasso underground laboratories (Italy). The main goal of the experiment is the spectroscopy of sub-MeV solar neutrinos focusing on the measurement of the 7 Be neutrino flux on Earth. In order to achieve such a goal Borexino has developed a new technology for large-scale low-count rate experiments. This paper reviews the status of the experiment and the strategy adopted to reach a high level of radiopurity. Besides its primary task Borexino will also be able to search for SuperNova neutrinos, non-standard neutrinos properties and neutrino from the Earth.

HADIS KURAIB DALAM KONSEP RUKYATUL HILAL

1970 ◽  
Vol 13 (2) ◽  
Author(s):  
Muslih Husein
Keyword(s):  
The West ◽  
The Earth ◽  
New Moon ◽  
The Republic

Hisab dan rukyat, hakikatnya, adalah cara untuk mengetahui pergantian bulan. Kajian ini memperlihatkan beberapa temuan. Pertama, korelasi antara hadis Kuraib dan terjadinya perbedaan penetapan awal Ramadan, Syawal, dan Dzul Hijjah di Indonesia. Kementerian Agama Republik Indonesia telah menetapkan bahwa Indonesia secara keseluruhan menjadi satu wilayah hukum (wilayatul hukmi). Kedua, tentang keberhasilan rukyat al-hilal di satu kawasan yang diberlakukan bagi kawasan lain di muka bumi. Perlu diketahui bersama bahwa visibilitas pertama hilal tidak meliputi seluruh muka bumi pada hari yang sama, melainkan membelahnya menjadi dua bagian: (1) bagian sebelah Barat yang dapat melihat hilal dan (2) bagian sebelah Timur yang tidak dapat melihat hilal.Hisab and rukyat is a way to know the turn of the month. This study shows several findings. First is the correlation between Kuraib traditions and differences in the determination of the beginning of Ramadan, Shawwal, and Dhul-Hijjah in Indonesia. Ministry of Religious Affairs of the Republic of Indonesia has stated that Indonesia as a whole into a single jurisdiction (wilayatul hukmi). Second, on the success rukyat alhilal in one area that applied to other regions of earth. Important to know that the first visibility of the new moon does not cover the entire face of the earth on the same day, but splitting it into two parts: (1) part of the West to see the new moon, and (2) part of the East were not able to see the new moon.

LUMINESCENT DETERMINATION OF SUGAR IN NATURAL HONEY

2020 ◽  
Vol 0 (4) ◽  
pp. 29-32
Author(s):  
B.M. GAREEV ◽  
◽  
A.M. ABDRAKHMANOV ◽  
G.L. SHARIPOV ◽  
◽  
...  
Keyword(s):  
Quantum Dots ◽  
Laboratory Test ◽  
Aqueous Solutions ◽  
Analytical Method ◽  
Sugar Content ◽  
Carbon Quantum Dots ◽  
Photoluminescence Intensity ◽  
Sucrose Content ◽  
Natural Honey

The photoluminescence of carbon quantum dots synthesized from natural honey and mixtures of honey and sugar has been studied. An increase in the sugar content leads to a decrease in the photoluminescence intensity without changing the shape of the luminescence spectrum of these quantum dots aqueous solutions, which is associated with a decrease in the yield of their synthesis in the sugar presence. The discovered effect can be used to detect sugar in honey. When examining five different market samples of flower honey using this method, two of them showed a significant decrease in the photoluminescence intensity. A laboratory test for compliance with GOST 19792-2017 Standard requirements established an excess of the sucrose content in these samples. Luminescent determination of sugar in honey does not require complicated equipment and can be used to develop a new analytical method for determining the sugar content in counterfeit natural honey.

Forecasting the fl ood situation using space images in the city of Tavda Sverdlovsk region

2018 ◽  
Vol 934 (4) ◽  
pp. 46-52
Author(s):  
A.S. Bruskova ◽  
T.I. Levitskaya ◽  
D.M. Haydukova
Keyword(s):  
Water Levels ◽  
Economic Damage ◽  
Geoinformation System ◽  
Space Images ◽  
Geoinformation Systems ◽  
Emergency Situations ◽  
The Earth ◽  
Maximum Water ◽  
The City

Flooding is a dangerous phenomenon, causing emergency situations and causing material damage, capable of damaging health, and even death of people. To reduce the risk and economic damage from flooding, it is necessary to forecast flooding areas. An effective method of forecasting emergency situations due to flooding is the method of remote sensing of the Earth with integration into geoinformation systems. With the help of satellite imagery, a model of flooding was determined based on the example of Tavda, the Sverdlovsk Region. Space images are loaded into the geoinformation system and on their basis a series of thematic layers is created, which contains information about the zones of possible flooding at given water level marks. The determination of the area of flooding is based on the calculation of the availability of maximum water levels at hydrological stations. According to the calculated security data, for each hydrological post, flood zones are constructed by interpolation between pre-calculated flood zones of standard security. The results of the work can be used by the Main Directorate of the Ministry for Emergency Situations of Russia for the Sverdlovsk Region.

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