Böcker av Mohan Lal

The book (Concepts of Mathematics), having four chapters on diverse topics usually included in the mathematics syllabus of the first year Engineering class of most Universities. The first chapter deals with the Number Property Theory: Divisibility rules, Property, Ratios with suitable example. A brief discussion of Trigonometry is given in the second chapter. Trigonometry chapter include various points like Trigonometric Ratios, Trigonometric Identities, ASTC Rule, Arcs, Sectors, Segments, Trigonometric Graphs, Inverse Trigonometry, Range, Domain, Graph of Sin/Cos/Tan. The third chapter deals with the Coordinate Geometry and it includes coordinate plane, distance between two point, mid point, slope of line, equation of line, transformations, shifts (horizontal and vertical), stretches. Vectors are introduced in the fourth chapter and covered vector definition, addition, subtraction, unit vector, null vector, scalar multiplication, rank, dot product. Few questions are given based on vectors for practice in the last of fourth chapter.

This Book serves as a useful knowledge in the field of Agricultural Technology and Engineering. A Hand operated winnower was developed for ergonomic evaluation. The winnower was ergonomically evaluated using 6 subjects. Two workers are required for the operation of this winnower, one for cranking the blower and other for feeding the threshed material and collection of grain. The mean heart rate, Oxygen consumption rate, and Energy expenditure rate of the workers and their output were measured to evaluate the winnower. The equipment developed was found to be suitable for operation by male as well as women workers as the heart rate, work pulse value and energy expenditure rate are within the acceptable limits.

In this two-volume biography of 1846, Indian diplomat and author Mohan Lal (1812-77) describes the life of Amir Dost Mohammed Khan (1793-1863), the ruler of Afghanistan, his political dealings with the English, Russian and Persian governments at the time of the 'Great Game' in Central Asia.