The Tracking of the Sun for Solar Paraboloidal Dish Concentrators

2005 ◽  
Vol 127 (1) ◽  
pp. 156-160 ◽  
Author(s):  
S. Shanmugam ◽  
W. Christraj
Keyword(s):  
Computer Program ◽  
Visual Basic ◽  
Energy Yield ◽  
The Sun ◽  
American Institute ◽  
Solar Altitude ◽  
The North ◽  
The Relationship ◽  
East West ◽  
Solar Altitude Angle

Paraboloidal dish concentrators need tracking the sun in the east-west and north-south direction continuously throughout the year. But this paper explains the method of intermittent tracking of the sun in the north-south direction with no tracking in the east-west direction for less energy yield. The frequency of tracking in the north-south direction is determined by the relationship between the variation in solar altitude angle and the size of the absorber in the Paraboloidal dish concentrator. A computer program in Visual BASIC is written to enable the detailed calculations of data for the analysis.© 2004 American Institute of Physics.

The 158 MHz Solar Interferometer at Culgoora

1967 ◽  
Vol 1 (2) ◽  
pp. 59-61 ◽  
Author(s):  
R. T. Stewart
Keyword(s):  
Active Region ◽  
Radio Burst ◽  
Solar Radio ◽  
Second Harmonic ◽  
Solar Observatory ◽  
Solar Radio Burst ◽  
The Sun ◽  
Harmonic Frequency ◽  
The North ◽  
East West

The function of the 158 MHz interferometer operating at the CSIRO Solar Observatory, Culgoora, N.S.W., is the measurement of solar radio burst positions at a frequency close to the second harmonic frequency of the radioheliograph. The interferometer is designed to measure the north-south and east-west position co-ordinates of an isolated active region on the Sun with an accuracy of ~1′ arc, at rates up to 16 s−1.

scholarly journals Ordovician graptolite biostratigraphy in North Greenland

1989 ◽  
Vol 144 ◽  
pp. 17-33
Author(s):  
M Bjerreskov
Keyword(s):  
Deep Water ◽  
Canadian Cordillera ◽  
Large Collection ◽  
Arctic Canada ◽  
The North ◽  
Water Trough ◽  
Relationship Of ◽  
The Relationship ◽  
East West ◽  
North Greenland

Up to 500 m of black-bedded cherts and mudstones with thin turbidites and thick local beds of redeposited limestone and chert conglomerates were deposited during the Ordovician in North Greenland, along the southern margin of an east-west trending deep-water trough forming a continuation of the Frank Jinian Basin of Arctic Canada. A large collection of Ordovician graptolites has recently been obtained from this clastic sequence. The graptolite fauna, not collected in continuous sections, compares particularly well with the fauna from the Canadian Cordillera and for the most part is interpreted in terms of the established biozones from that area. The faunas are also correlated with the Australian zonal sequences. In North Greenland neither the Cambrian-Ordovician boundary nor the Ordovieian-Silurian boundary ean be precisely demarcated by graptolites. The folIowing graptolite biozones are represented: Anisograptus, Adelograptus & Clonograptus, T. approximalus, P. frulicosus, D. bifidus, I. victoriae lunatus, ? T. victoriae victoriae, ? l. victoriae maximus, Oncograptus, P. tentaculatus, ? 'D.' decoratus, ? H. lereliusculus, N. gracilis, C. bicornis, ? O. amplexicaulis, O. quadrimucronatus, D. ornatus and? P. pacificus. The relationship of the North Grecnland graptolites to the Ordovician 'Pacific faunal realm' and oceanic graptolite biofacies is briefly discussed.

scholarly journals ABSORBER PLATES POSITION INFLUENCE ON SOLAR COLLECTOR OPERATION EFFICIENCY

2018 ◽  
Vol 20 (5-6) ◽  
pp. 37-45
Author(s):  
M. M. Asanov
Keyword(s):  
Solar Collector ◽  
Azimuth Angle ◽  
Operating Efficiency ◽  
The Sun ◽  
Solar Altitude ◽  
Different Types ◽  
Collector Efficiency ◽  
The Mathematical Model ◽  
Generating System ◽  
Solar Altitude Angle

In order to increase the operating efficiency of solar power generating system its absorbing surface must be continuously turned towards the Sun. Modern Sun tracking systems are analyzed. Operation of solar air wall-type collector is considered. Collector’s absorber plates were situated in two ways – horizontally and vertically. Operation of the collector with horizontally situated plates is to turn of the plates towards the Sun according to solar altitude angle. Vertically situated plates position depends on solar azimuth angle. Cross shading of the absorbers plates during Sun tracking is calculated. To estimate the collector efficiency its operation within two days of the year (1.01.2016 and 11.06.2016) is studied. In order to compare the collectors’ characteristics with different types of the absorber the mathematical model is built.

Relative Orientation of Prasat Hin Phanom Rung Temple to Spica on New Year’s Day: The Chief Indicator for the Intercalary Year of the Luni-Solar Calendar

2019 ◽  
Vol 15 (S367) ◽  
pp. 260-264
Author(s):  
Siramas Komonjinda ◽  
Orapin Riyaprao ◽  
Korakamon Sriboonrueang ◽  
Cherdsak Saelee
Keyword(s):  
Full Moon ◽  
Relative Orientation ◽  
Direct Connection ◽  
The Sun ◽  
13Th Century ◽  
The West ◽  
West Side ◽  
The Relationship ◽  
The Temple ◽  
East West

AbstractPrasat Hin Phanom Rung, located in Buriram Province of Thailand, is an ancient temple that had been built between the 10th and 13th century. The temple, which is off east-west orientation by 5.5° towards north, has unveiled the astonishing phenomena exhibiting both astronomical and architectural intellect of the ancient builders. The phenomena involve perfect quarterly-alignments of the sun through all the fifteen doorways of the temple. The phenomenal orientation of this ancient architecture has been elucidated by several scholars—including historians, archaeologists, and astronomers—that it might be related to solar or lunar events only. However, our studies have otherwise found a clue to this mystery that it may be based on how the ancient intelligence used stars in the zodiacal constellations to regulate agricultural calendars. In this study, we find that Phanom Rung was oriented with respect to Spica such that on the day Spica set on the west-side doorway at dawn, the sun was entering Mesha Rashi (Aries). This day has a direct connection to a New Year’s Day of Saka calendar (Śaka Era), presently called Thaloeng Sok Day. Furthermore, we have found the relationship between Spica and the full moon of Caitra from which the intercalary month-year (Adhikamas) was detected.

Das Nord-Süd-Verhältnis zu Beginn der neunziger Jahre: Neue Strukturen eines alten Konflikts?

1992 ◽  
Vol 36 (1) ◽  
pp. 8-18
Author(s):  
Hans Diefanbacher ◽  
Ulrich Ratsch
Keyword(s):  
Developing Countries ◽  
Global Climate Change ◽  
Development Policy ◽  
Global Climate ◽  
Terms Of Trade ◽  
The North ◽  
Lost Decade ◽  
The One ◽  
The Relationship ◽  
East West

AbstractThe paper of Hans Diejenbacher and Ulrich Ratschstrats from the thesis that although the eighties have been a lost decade for the developing countries, the structures of the conflict between the North and the South have changed drastically. Those changes are exemplified by six different problern areas: the danger of an irreversible global climate change, the deterioration of the terms of trade for the developing countries, the impoverishment of the least development countries, the relationship between foreign debts and inflation, the crisis of development policy, and the effects of the changing east-west-conflict. The description of those conflict areas Ieads to the question how it could be possible to overcome the discrepancy between the knowledge about these problems on the one hand and the willingness to initiate political change on the other band.

scholarly journals Multi objective optimization of window to wall ratio of University Gymnasium in severe cold area by coupling natural lighting and energy consumption

2021 ◽  
Vol 293 ◽  
pp. 02044
Author(s):  
Zong Junlin ◽  
Zhang Longwei
Keyword(s):  
Energy Consumption ◽  
Digital Simulation ◽  
Side Window ◽  
Natural Lighting ◽  
The North ◽  
Window Opening ◽  
Cold Area ◽  
Opening Ratio ◽  
The Relationship ◽  
East West

Objective To explore the relationship between window opening ratio and natural lighting and energy consumption of University Gymnasiums in severe cold area, and put forward optimization strategies. Methods Digital simulation technology was used to simulate the energy consumption and natural lighting of University Gymnasium window opening ratio, and the window opening scheme with natural lighting and low energy consumption was obtained. Conclusion The side window lighting should be used in the window opening scheme of small and medium-sized university gymnasiums. Within the range of experimental data, the North-South lighting is the main lighting mode, and the East-West lighting is the auxiliary.

Spatial and Temporal Analysis of Weed Seedling Populations Using Geostatistics

Weed Science ◽  
1996 ◽  
Vol 44 (3) ◽  
pp. 704-710 ◽  
Author(s):  
Gregg A. Johnson ◽  
David A. Mortensen ◽  
Carol A. Gotway
Keyword(s):  
Temporal Stability ◽  
Patch Dynamics ◽  
Temporal Analysis ◽  
Seedling Mortality ◽  
Soybean Field ◽  
Growing Seasons ◽  
The North ◽  
Spatial And Temporal Analysis ◽  
The Relationship ◽  
East West

An intensive field survey of an eastern Nebraska corn and soybean field was conducted to characterize the spatial structure and temporal stability of broadleaf weed seedling populations over two growing seasons. Anisotropy, the effect of direction on the relationship between observations, is present in the semivariogram for the velvetleaf and common sunflower populations in 1992 and 1993. The directional trends in aggregation are visible in kriged maps as elliptical shapes oriented east to west across the study area. In addition, there are two distinct zones of aggregation from north to south. These two distinct areas of aggregation are reflected as a ‘plateau’ in the north-south semivariogram. The distance over which this plateau extends indicates that the shape or size of the patch is contracting in the north-south direction (perpendicular to the crop row). The slope of the semivariogram in the east-west direction (aligned with the crop row) remains consistent from 1992 to 1993 suggesting that the shape of the patch is not changing. For sunflower populations, the slope of the north-south empirical semivariogram changes at 20 m, similar to the velvetleaf population semivariograms. This change, however, is reflected as a downward trend in the empirical semivariogram. The distance over which this trend occurs increases from 1992 to 1993 suggesting that seedling patch size was smaller in 1993 compared to 1992. Weed seedling establishment resulting from seed dispersal, differential seed and seedling mortality, or emergence may have resulted in the observed patch dynamics.

Rola Avarského Kaganátu Pri Vzniku Slovenčiny

2018 ◽  
Vol 69 (2) ◽  
pp. 199-236
Author(s):  
Martin Braxatoris ◽  
Michal Ondrejčík
Keyword(s):  
Slavic Language ◽  
The West ◽  
The North ◽  
Danube Region ◽  
The Absolute ◽  
North Edge ◽  
The Relationship ◽  
Slovak Language

Abstract The paper proposes a basis of theory with the aim of clarifying the casual nature of the relationship between the West Slavic and non-West Slavic Proto-Slavic base of the Slovak language. The paper links the absolute chronology of the Proto-Slavic language changes to historical and archaeological information about Slavs and Avars. The theory connects the ancient West Slavic core of the Proto-Slavic base of the Slovak language with Sclaveni, and non-West Slavic core with Antes, which are connected to the later population in the middle Danube region. It presumes emergence and further expansion of the Slavic koiné, originally based on the non-West Slavic dialects, with subsequent influence on language of the western Slavic tribes settled in the north edge of the Avar Khaganate. The paper also contains a periodization of particular language changes related to the situation in the Khaganate of that time.

Examining the Kinships System of the Bodo

Think India ◽  
2019 ◽  
Vol 22 (3) ◽  
pp. 186-192
Author(s):  
Dr. Oinam Ranjit Singh ◽  
Dr. Nushar Bargayary
Keyword(s):  
Social Relationships ◽  
Social Cohesion ◽  
Social Relationship ◽  
Vital Role ◽  
Eastern Region ◽  
The North ◽  
Kinship System ◽  
North Eastern ◽  
The World ◽  
The Relationship

The Bodo of the North Eastern region of India have their own kinship system to maintain social relationship since ancient periods. Kinship is the expression of social relationship. Kinship may be defined as connection or relationships between persons based on marriage or blood. In each and every society of the world, social relationship is considered to be the more important than the biological bond. The relationship is not socially recognized, it fall outside the realm of kinship. Since kinship is considered as universal, it plays a vital role in the socialization of individuals and the maintenance of social cohesion of the group. Thus, kinship is considered to be the study of the sum total of these relations. The kinship of the Bodo is bilateral. The kin related through the father is known as Bahagi in Bodo whereas the kin to the mother is called Kurma. The nature of social relationships, the kinship terms, kinship behaviours and prescriptive and proscriptive rules are the important themes of the present study.

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