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Search Results: 1 - 10 of 200026 matches for " Pal N "
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Aportes al estudio de la integridad del sitio Laguna La Barrancosa 1 (partido de Benito Juárez, provincia de Buenos Aires): análisis textural y distribucional de los microdesechos líticos
Pal,Nélida;
Intersecciones en antropolog?-a , 2008,
Abstract: in this paper the results obtained from microdebitage analysis of laguna la barrancosa 1 site are presented. the main objective is to contribute to the study of site integrity starting from the identification of the cultural and natural processes that took part in its formation. in order to fulfill this objective, the study of the spatial distribution and textural analysis of the microdebitage were carried out, subsequently combining them with stratigraphic and sedimentological approaches. the analysis of vertical distribution showed a scarce dispersion of lithic and bone materials without a strong distribution by size. however, the study of horizontal distribution allowed lithic concentrations in specific places of the site to be identified. the textural analysis of the lithic assemblage (microdebitage, macrodebitage and tools) proved that roots were the main agent affecting the lithic surfaces; edge and ridge rounding was also observed in the studied assemblages, probably as a result of cultural activities (e.g., platform preparation). hence, these results suggest that natural formation processes would not have significantly affected the site integrity.
Lymphoma of choroid
Sen S,Pal N
Indian Journal of Ophthalmology , 1984,
Abstract:
Aportes al estudio de la integridad del sitio Laguna La Barrancosa 1 (partido de Benito Juárez, provincia de Buenos Aires): análisis textural y distribucional de los microdesechos líticos Contributions To The Study Of The Archaeological Integrity Of Laguna La Barrancosa 1 Site (Benito Juárez District, Buenos Aires Province): Textural And Spatial Analysis Of The Lithic Microdebitage
Nélida Pal
Intersecciones en Antropología , 2008,
Abstract: En este trabajo se presentan los resultados obtenidos del análisis de los microdesechos líticos del sitio Laguna La Barrancosa 1 (partido de Benito Juárez, provincia de Buenos Aires). El objetivo general es aportar al estudio de la integridad del sitio a partir de la identificación de los procesos culturales y naturales que intervinieron en su formación. Para cumplir con el objetivo se llevaron a cabo análisis de la distribución espacial del material óseo y lítico y textural del conjunto lítico, conjuntamente con estudios estratigráficos y sedimentológicos. Por un lado, el análisis de la distribución vertical evidenció una escasa dispersión de los materiales óseos y líticos, no existiendo una marcada distribución de los mismos por tama o. Por otro lado, el estudio de la distribución horizontal permitió identificar concentraciones de material lítico en sectores específicos del sitio. El análisis textural del conjunto lítico (microdesechos, macrodesechos y artefactos formatizados) demostró que el principal agente que afectó la superficie de los ítems fue la acción de raíces, además se ha identificado redondeamiento en bordes y aristas del material lítico producto de la actividad cultural (e.g., preparación de la plataforma). De esta manera, los resultados obtenidos permiten inferir que los procesos naturales de formación de sitio no habrían afectado significativamente la integridad del sitio. In this paper the results obtained from microdebitage analysis of Laguna La Barrancosa 1 site are presented. The main objective is to contribute to the study of site integrity starting from the identification of the cultural and natural processes that took part in its formation. In order to fulfill this objective, the study of the spatial distribution and textural analysis of the microdebitage were carried out, subsequently combining them with stratigraphic and sedimentological approaches. The analysis of vertical distribution showed a scarce dispersion of lithic and bone materials without a strong distribution by size. However, the study of horizontal distribution allowed lithic concentrations in specific places of the site to be identified. The textural analysis of the lithic assemblage (microdebitage, macrodebitage and tools) proved that roots were the main agent affecting the lithic surfaces; edge and ridge rounding was also observed in the studied assemblages, probably as a result of cultural activities (e.g., platform preparation). Hence, these results suggest that natural formation processes would not have significantly affected the site integrity.
Rectangular Microstrip Patch Antenna Using Air as Substrate for S-Band Communication  [PDF]
Manish Gupta, Saurabh Sachdeva, N. Kumar Swamy, Inder Pal Singh
Journal of Electromagnetic Analysis and Applications (JEMAA) , 2014, DOI: 10.4236/jemaa.2014.63006
Abstract:

A Rectangular Microstrip Patch Antenna model is proposed using air as a substrate to study the characteristics of designed antenna. The dimensions of designed antenna are 17 mm × 16.66 mm with substrate at frequency 3.525 GHz. In this paper, the simulation is performed by using software Computer Simulation Technology (CST) Microwave studio based on finite difference time domain technique. The characterization of the designed antenna was analyzed in terms of return loss, bandwidth, directivity, gain, radiation pattern, VSWR.

Extreme value statistics of correlated random variables
Satya N. Majumdar,Arnab Pal
Statistics , 2014,
Abstract: Extreme value statistics (EVS) concerns the study of the statistics of the maximum or the minimum of a set of random variables. This is an important problem for any time-series and has applications in climate, finance, sports, all the way to physics of disordered systems where one is interested in the statistics of the ground state energy. While the EVS of uncorrelated variables are well understood, little is known for strongly correlated random variables. Only recently this subject has gained much importance both in statistical physics and in probability theory. In this note, we will first review the classical EVS for uncorrelated variables and discuss few examples of correlated variables where analytical progress can be made.
New Greener Alternative for Biocondensation of Aldehydes and Indoles Using Lemon Juice: Formation of Bis-, Tris-, and Tetraindoles  [PDF]
Rammohan Pal
International Journal of Organic Chemistry (IJOC) , 2013, DOI: 10.4236/ijoc.2013.32015
Abstract:

This work presents a new greener alternative for biocondensation of aldehydes and indoles for the synthesis of bis- and tris(indolyl)methanes catalyzed by lemon juice (Citrus limon) in good yields under ultrasound irradiation in aqueous ethanol. Various substituted aldehydes with indoles under this reaction condition are elucidated. Also, tetraindolyl compounds were prepared using terephthaldialdehyde by following the same protocol. This method is an environmentally benign, efficient reaction, which requires shorter reaction time and simple experimental and work-up procedures.

Isolation and Identification of Staphylococcus Species from Raw Bovine Milk in Debre Zeit, Ethiopia
Mekonnen Addis,Mahindra Pal,Moses N. Kyule
Veterinary Research , 2012, DOI: 10.3923/vr.2011.45.49
Abstract: In this study, investigation of the presence of Staphylococcus and determination of its prevalence and distribution, identification of Staphylococcus species and determination of their prevalence and distribution and characterization of the isolates in order to determine their ability in synthesizing coagulase from raw bovine milk samples were conducted from October 2008-April 2009 in Debre Zeit, Ethiopia. About 200 raw bovine milk samples consisting of 100 buckets milk of farms and 100 tanks milk of milk collection centers were analyzed. The identification results showed 33 and 46% prevalence of Staphylococcus in buckets milk and tanks milk, respectively with an overall prevalence of 39.5% (79/200). Comparison of the prevalence of Staphylococcus in raw bulk milk samples showed a relatively higher prevalence in tanks milk (46%) than buckets milk (33%). However, this difference was not statistically significant (p>0.05). The 33 isolates identified as staphylococci from samples of buckets milk were tested for species assignment. They were grouped into S. aureus with 8 (8%) isolates, S. intermedius with 6 (6%) isolates, S. hycius with 6 (6%) isolates and Coagulase Negative Staphylococci (CNS) with 13 (13%) isolates. The 46 staphylococci isolates were grouped into S. aureus with 10 (10%) isolates, S. intermedius with 11 (11%) isolates, S. hycius with 6 (6%) isolates and CNS with 19 (19%) isolates. There was no significant difference (p>0.05) among these proportion of isolates in both buckets and tanks milk. All the isolates were tested for the production of coagulase to determine their pathogenicity. Comparison of the prevalence of Coagulase Positive Staphylococci (CPS) showed a relatively higher CPS prevalence in tanks milk (27%) than buckets milk (20%). However, this difference was not statistically significant (p>0.05). The high level of Staphylococcus isolate found raw milk samples in the present study represent a poor quality and public health risk to the consumer. Hence, raw milk intended for human consumption must be subjected to pasteurization or heat treatment at least equivalent to pasteurization temperature order to guarantee the quality of these highly popular products in Debre Zeit in order to decrease the risk of staphylococcal food poisoning.
Isolation and Identification of Staphylococcus Species from Ethiopian Cottage Cheese (Ayib) in Debre Zeit, Ethiopia
Mekonnen Addis,Mahindra Pal,Moses N. Kyule
Veterinary Research , 2012, DOI: 10.3923/vr.2011.13.17
Abstract: In this study, investigation of the presence of Staphylococcus and determination of its prevalence and distribution, identification of Staphylococcus species and determination of their prevalence and distribution and characterization of the isolates in order to determine their ability in synthesizing coagulase from Ethiopian cottage cheese (Ayib) were conducted from October 2008-April 2009 in Debre Zeit, Ethiopia. About 200 cottage cheese (Ayib) samples were analyzed. The identification results showed 24%, Staphylococcus prevalence. The 48 isolates proved to be Staphylococcus were tested for species assignment. They were grouped into S. aureus with 10 (5%) isolates, S. intermedius with 11 (5.5%) isolates, S. hycius with 8 (4%) isolates and coagulase negative staphylococci with 19 (9.5%) isolates. All the isolates were tested for the production of coagulase to determine their pathogenicity. The prevalence of coagulase positive staphylococci in the study were found to be 14.5%. The high level of Staphylococcus isolate found in the Ethiopian cottage cheese (Ayib) in the present study represent a poor keeping quality and public health risk to the consumer. This suggests the need to implement strict hygienic control measures along the food chain to improve the hygienic conditions during manufacturing, handling, storage and commercialization of cheese in order to guarantee the quality of this highly popular product in Debre Zeit, Ethiopia in order to decrease the risk of staphylococcal food poisoning.
Heteroclinic Bifurcation and Multistability in a Ratio-dependent Predator-Prey System with Michaelis-Menten Type Harvesting Rate
N. Bairagi,S. Chakraborty,S. Pal
Lecture Notes in Engineering and Computer Science , 2012,
Abstract:
Neurilemmoma of orbit
Sen S,Pal N,Das A
Indian Journal of Ophthalmology , 1979,
Abstract:
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