THE DESIGN AND ANALYSIS OF EXPERIMENTS. By Oscar Kempthorne. New York, John Wiley and Sons, Inc., 1952. 631 pp. $8.50. This book by a teacher of statistics (as well as a consultant for \"experimenters\") is a comprehensive study of the philosophical background for the statistical design of experiment. It is necessary to have some facility with algebraic notation and manipulation to be able to use the volume intelligently. The problems are presented from the theoretical point of view, without such practical examples as would be helpful for those not acquainted with mathematics. The mathematical justification for the techniques is given. As a somewhat advanced treatment of the design and analysis of experiments, this volume will be interesting and helpful for many who approach statistics theoretically as well as practically. With emphasis on the \"why,\" and with description given broadly, the author relates the subject matter to the general theory of statistics and to the general problem of experimental inference. MARGARET J. ROBERTSON

The Design and Analysis of Experiments

Geochemical discrimination of siliciclastic sediments from active and passive margin settings

Geochemistry of the Jurassic and Upper Cretaceous shales from the Molango Region, Hidalgo, eastern Mexico: Implications for source-area weathering, provenance, and tectonic setting

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Annual Report-2007-2008

The weathering conditions, provenance, and tectonic setting of sands from the San Nicolas (SN) and San Carlos (SC) beaches along the Gulf of California, Mexico, have been studied using mineralogy, major element, and trace element data. The compositional similarity among 4 independent groups (each beach area consists of 2 grain-size groups, i.e. medium- and fine-grained sands) was tested statistically by the application of analysis of variance at the 99% confidence level to avoid misinterpretation. The X-ray diffraction and SEM-EDS data revealed that the fine-grained SN sands were abundant in rutile and zircon minerals. The higher SiO2/Al2O3 ratio of the SN sands than the medium- and fine-grained SC sands indicated that the compositional maturity was greatest for the SN sands (Fcalc = 366.756151 and (Fcrit)99% = 5.065158, where Fcalc > (Fcrit)99% indicates that the data populations are significantly different at 99% confidence level). The chemical index of alteration values for the SN (ca. 41-45) and SC (ca. 48-51) sands indicated low to moderate weathering intensity in the source region. The significant enrichment of the low rare earth element and the flat heavy rare earth element patterns of the SN sands indicated that the sources were largely felsic rocks. The low positive Eu anomaly in the SC sands was probably due to the contribution of sediments from intermediate rocks between felsic and mafic compositions. The comparison of rare earth element data of the sands with rocks located relatively close to the study areas revealed that the SN sands received a major contribution from felsic rocks and SC sands from intermediate rocks. The compositional difference between the SN and SC beach areas indicated that longshore currents played a less significant role. Discriminant function-based major element diagrams for the tectonic discrimination of siliciclastic sediments revealed a rift setting for the Gulf of California, which is consistent with the general geology of Mexico.

/pdf/geochemistry-of-sands-along-the-san-nicolas-and-san-carlos-1d33yh8zfh.pdf

Geochemistry of sands along the San Nicolás and San Carlos beaches, Gulf of California, Mexico: implications for provenance and tectonic setting

Srivastava AK, Rai MK. 2012. Review: Sugarcane production: impact of climate change and its mitigation 13: 214-227. Sugarcane is aÂ climatic sensitive crop: therefore, its spatial distribution on the globe is restricted as per the suitability of various climatic parameters.Â The climate change, though, a very slow phenomenon is now accelerated due to natural, as well as enormous human activities disturbingÂ the composition of atmosphere. The predications of various climatic models for probable rise in temperature, rainfall, sea level show anÂ alarming condition in forthcoming decades. As the sugarcane is very sensitive to temperature, rainfall, solar radiations etc. therefore, aÂ significant effect on its production and sugar yield is expected in future. It is also well known that sugarcane is one of the precious cropsÂ of the world and its end products i.e. sugar and ethanol have a continuous growing demand on global level. Hence, the studies related toÂ good production of sugarcane in changing conditions of climate has become one among the front line area of research and is a majorÂ concern of scientistâ€™s world over. Advance agronomic measures including development of suitable cane varieties susceptible to changedÂ climatic conditions, land preparation, time and pattern of plantation, weed, disease and pest managements, nutrients managements,Â proper timing and adequate water management seems to be the affective measures for obtaining high production of crop with goodÂ quality juice in future.

/pdf/review-sugarcane-production-impact-of-climate-change-and-its-3eemihp4hz.pdf

Review: Sugarcane production: Impact of climate change and its mitigation

Mineralogical and geochemical studies of glacial sediments from Schirmacher Oasis, East Antarctica

A detailed grain-size analysis of twenty-two sandstone samples from the uppermost Gondwana succession of Salbardi area has been carried out to interpret the depositional pattern. The sandstones are mainly medium to coarse grained, moderately sorted, near-symmetrical to fine-skewed and mesokurtic in nature. Inter-relationship of various parameters shows bimodal nature of sediments having dominance of medium sand. Based on the granulometric analysis, a fluvial environment of deposition is interpreted for the succession.

Grain size analysis and depositional pattern of upper Gondwana sediments (Early Cretaceous) of Salbardi area, districts Amravati, Maharashtra and Betul, Madhya Pradesh

Sediment samples have been collected from the Schirmacher Oasis and adjoining area in East Antarctica; these areas consist of polar ice, ice-free area, lakes and the coastal shelf area. The 37 samples have been analysed for their grain-size parameters and statistical relationships. The oasis is characterised by ongoing glacial processes, including deposition and erosion of the sediments by ice, meltwater and winds, thus influencing the sediments in various ways. Basic statistical grain-size parameters like graphic mean, standard deviation, skewness and kurtosis have been calculated for the four units. The sediments of all areas are almost all poorly to very poorly sorted, fine-skewed to near-symmetrical and platykurtic to leptokurtic in nature. Bivariate plots between the grain-size parameters have been interpreted. They do, apart from a few exceptions, not show any trend suggesting relationships between the sediments of the four landscape types. Both tand F-tests have been applied on the samples, and the phi values and grain-size parameters have been analysed; these show that the group variances of the samples are not significant, but that the phi-values are significant.

/pdf/grain-size-characteristics-of-deposits-derived-from-1gz6xbi2ex.pdf

Grain-size characteristics of deposits derived from different glacigenic environments of the Schirmacher Oasis, East Antarctica

Establishment of lithofacies and interpretation of depositional environment of the Lameta Formation have been carried out for a new area having three nearby exposures. Overall, the successions are broadly differentiable into three major units, i.e. arenaceous in the lower part, argillaceous in middle and calcareous at the top, which more or less serve as three lithofacies associations. Each association consists of various lithofacies which are identified and established on the basis of field observations, added with significant petrological details. The arenaceous association includes five lithofacies, viz. massive sandstone lithofacies; green sandstone lithofacies; thinly bedded, yellowish orange and greyish brown sandstone lithofacies; coarse-grained sandstone lithofacies and dark brown bioturbated sandstone lithofacies. The argillaceous lithofacies association consists of yellowish-brownish-greenish clay–siltstone lithofacies and light grey silty–clay with concretions lithofacies, whereas the calcareous lithofacies association is represented by calcrete lithofacies, nodular limestone lithofacies, chertified limestone lithofacies and intraformational breccia lithofacies. The facies analysis reveals that the deposition of Late Cretaceous Lameta sediments took place in fluvial–lacustrine environments in semi arid condition.

/pdf/lithofacies-architecture-and-depositional-environment-of-4puul13n5n.pdf

Ashok K. Srivastava

Papers

Review: Sugarcane production: Impact of climate change and its mitigation

Mineralogical and geochemical studies of glacial sediments from Schirmacher Oasis, East Antarctica

Grain size analysis and depositional pattern of upper Gondwana sediments (Early Cretaceous) of Salbardi area, districts Amravati, Maharashtra and Betul, Madhya Pradesh

Grain-size characteristics of deposits derived from different glacigenic environments of the Schirmacher Oasis, East Antarctica

Lithofacies architecture and depositional environment of Late Cretaceous Lameta Formation, central India