A Review on Chemical Stabilization of Peat     

Khanday  Suhail Ahmad  Hussain  Monowar  Das  Amit Kumar 《Geotechnical and Geological Engineering》2021,39(8):5429-5443

Geotechnical and Geological Engineering - Peat is a problematic or weak soil derived from fossilized organic material. The characteristics of peat like low shear strength (3–16 kPa),...  相似文献   

Correspondence of pilgrim dark energy with scalar field models     

Abdul Jawad  Asim Majeed 《Astrophysics and Space Science》2015,356(2):375-381

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Surface magnetic fields on two accreting T Tauri stars: CV Cha and CR Cha     

G. A. J. Hussain  A. Collier Cameron  M. M. Jardine  N. Dunstone  J. Ramirez Velez  H. C. Stempels  J.-F. Donati  M. Semel  G. Aulanier  T. Harries  J. Bouvier  C. Dougados  J. Ferreira  B. D. Carter  W. A. Lawson 《Monthly notices of the Royal Astronomical Society》2009,398(1):189-200

We have produced brightness and magnetic field maps of the surfaces of CV Cha and CR Cha: two actively accreting G- and K-type T Tauri stars in the Chamaeleon I star-forming cloud with ages of 3–5 Myr. Our magnetic field maps show evidence for strong, complex multipolar fields similar to those obtained for young rapidly rotating main-sequence stars. Brightness maps indicate the presence of dark polar caps and low-latitude spots – these brightness maps are very similar to those obtained for other pre-main-sequence and rapidly rotating main-sequence stars.
Only two other classical T Tauri stars have been studied using similar techniques so far: V2129 Oph and BP Tau. CV Cha and CR Cha show magnetic field patterns that are significantly more complex than those recovered for BP Tau, a fully convective T Tauri star.
We discuss possible reasons for this difference and suggest that the complexity of the stellar magnetic field is related to the convection zone; with more complex fields being found in T Tauri stars with radiative cores (V2129 Oph, CV Cha and CR Cha). However, it is clearly necessary to conduct magnetic field studies of T Tauri star systems, exploring a wide range of stellar parameters in order to establish how they affect magnetic field generation, and thus how these magnetic fields are likely to affect the evolution of T Tauri star systems as they approach the main sequence.  相似文献   

Ostracoda as an aid in identifying 2004 tsunami sediments: a report from SE coast of India     

S. M. Hussain  S. P. Mohan  M. P. Jonathan 《Natural Hazards》2010,55(2):513-522

Four short core samples were collected from the creek, estuarine regions of southeast (SE) coast of India affected by the 2004 Asian Tsunami. The study is aimed to signify the importance of ostracoda species in identifying major natural events (e.g. Tsunamis) in the coastal regions. The presence of many marine ostracoda species in the beach areas and the comparative studies with earlier reports from SE coast indicate that these species were brought by the high-energy tsunami waves. The depositional feature of ostracoda species in the beach and estuarine region also infers on the nature and force of tsunami waves in a particular region. The results clearly support that microfossils can be used to identify the major natural events close to coastal regions.  相似文献   

Multi temporal ERS-1 SAR data for identification of rice crop     

N K Patel  T T Medhavy  C Patnaik  A Hussain 《Journal of the Indian Society of Remote Sensing》1995,23(2):33-39

Microwave sensors having all-weather capabilities provide an opportunity to monitor rice grown in monsoon season. An attempt has been made to identify rice crop using multitemporal ERS-1 SAR data in C-band (5.3 GHz). Data acquired on August 15 (D1), September 19 (D2), October 24 (D3) and November 28 (D4) 1993 were taken. Combinations of data acquired on different dates were used for identification of rice crop. Single-date IRS-1B LISS II data in visible and NIR bands acquired on October 23, 1993 was also used for comparison of estimated rice area. Analysis of the results has shown that a combination of SAR data acquired at the tillering (August), booting (September) and heading (October) stages of rice crop enabled identification and area estimation of rice crop grown under lowland conditions. Single-date SAR data acquired in the month of October was found to be better for identification of rice compared to other dates.  相似文献   

Use of breakdown coefficients in turbulent jets to determine the universal exponent μ     

B. R. Satyaprakash  R. A. Antonia  D. H. Britz  A. K. M. F. Hussain 《Boundary-Layer Meteorology》1982,24(1):77-87

Second-order moments of the breakdown coefficients q _r,l of the squared velocity derivative in plane and circular jets indicate a value of the exponent which is larger than that obtained by other methods using the same data or that previously reported by other workers using the same method on atmospheric data. The difference may be due to a failure of the present data to satisfy the first condition of scale similarity, possibly because of the relatively small Reynolds numbers of the laboratory flows. The dependence of the variance of ln q _r,l on the length scale l appears to be independent of Reynolds number.  相似文献   

Cornish mackerel     

V.W. Talbot  R.J. Magee  M. Hussain 《Marine pollution bulletin》1976,7(5):84-86

Port Phillip Bay receives the industrial and domestic effluents from Melbourne and a recent survey revealed an accumulation of a variety of heavy metals in bottom sediments. These studies have now been extended to survey the accumulation in oysters and mussels, and in most areas in the Bay these bivalves are heavily contaminated with cadmium. Oysters accumulate more of this metal than mussels.  相似文献   

The behaviour of short-lived radiogenic lead isotopes (²¹⁴Pb and²¹²Pb) in groundwaters and laboratory leaching experiments     

N. Hussain  S. Krishnaswami 《Earth and Planetary Science Letters》1982,58(3):430-438

The concentrations of²¹⁴Pb (half-life=26.4minutes) and²²Rn (half-life=3.84days) have been measured in deep groundwaters of Gujarat, India. The results show that the abundance of²¹⁴Pb in the water is only ～25% of that expected from its production through the radioactive decay of dissolved²²²Rn. This deficiency if modelled in terms of a first-order removal, yields a residence time of ～10 minutes for²¹⁴Pb in these waters. The estimated residence time for²¹⁴Pb is the shortest observed for any nuclide in natural water systems and suggests that reactive nuclides lead like could be removed from aqueous phases to adjoining solid surfaces on extremely short time scales. Results of laboratory experiments using the²¹²Pb-²²⁴Ra pair are compatible with the observed fast removal of²¹⁴Pb from groundwaters.Re-evaluation of²³⁴Th residence times in these waters using a model with a recoil flux of²³⁴Th into aqueous phase, the same as that of²²²Rn, yields values in the range of 23 to<176 minutes, very similar to that of²¹⁴Pb. This “concordancy” in the residence times seems to suggest that the geochemical behaviour of²³⁴Th and²¹⁴Pb in these waters is quite similar.  相似文献   

Human genome behaviour: a powerful mechanism for optimizing the use of space technology in surveying networks design     

Hussain Aziz Saleh  Frank Vanden Berghen 《GPS Solutions》2005,9(3):201-211

An approach based on the behaviour of human genome is developed to efficiently provide a general framework for optimizing the use of space technology in surveying networks design. The developed approach attempts to apply the successful self-organizing principles based upon the biological evolution to artificial intelligence. It mimics the phenomena of natural selection observed in nature to achieve its goals by continuously adopting a population of candidate solutions and improving its performance over successive generations. The goal of adaptation is to find the best solution that optimizes the design of a surveying network based on the use of satellite observations. This network can be defined as a set of stations, co-ordinated by a series of sessions formed by placing receivers on the stations. The problem is to search for the best order for observing these sessions to give the best observation schedule at minimum cost. The obtained results prove the effectiveness of the developed technique in term of solution quality and computational efforts. The Corresponding Author in formed me that his address is likely to change soon. Please contact me, leick@spatial.maine.edu for the latest on this change.  相似文献   

Genotype and environment interaction effect on yield of cotton under naturally salt stress condition     

Y. Ali  Z. Aslam  F. Hussain 《International Journal of Environmental Science and Technology》2005,2(2):169-173

Thirteen genotypes of cotton developed through hybridization and mutation breeding techniques were evaluated during two consecutives years 2002-03-04 on eight locations covering most of the area of Punjab province including Faisalabad, Toba Tek Singh and Jhang. The eight sets of experiments were conducted in the naturally highly saline sodic soils, EC ranges from 7.8–36.1 d/Sm, pH=8.1–8.8, SAR=10.1–40.5, Saturation percentage 31.3–40.8 and texture Sandy Clay loam and Clay loam. The seed yield data was collected at maturity and stability parameters were computed to know genotypic environment interaction and varietals performance. The combined analysis of variance showed highly significant variance in case of varieties, locations and varieties x environment (Lin) also showed highly significant differences. It means that genotypes exhibited different behavior in different locations/environments which is due to their different genetic make up. The behavior may be cross over (in which significant change in ranking order occurs from one environment to another) or cross over nature (in which case the ranking of genotypes remains constant across environments and the interaction is significant because of change in the magnitude of response) depending upon the ranking order of genotypes performance under different environments. In our study only S-12 behavior was of almost non cross over nature, while others had cross over type of interaction. Based on over all seed yield cotton variety NIAB-999 and CIM-707 produced highest seed yield cotton (3.2 t/ha, 3.17t/ha). The lowest seed yield cotton was noted in S-12 (1.86 t/ha). All the three parameters of stability i.e. overall mean seed yield cotton, regression coefficient and standard deviation to regression provided clear evidence that variety NIAB-999 and CIM-707 produced maximum stable yield compared to S-12.  相似文献