Various physico-chemical characteristics of the River Yamuna flowing in Haryana through Delhi were studied in the summer (April 1998) and winter (Jan.-Feb. 1999). Ecological parameters like dissolved oxygen (DO), pH, nitrate (NO3-), sulfate (SO4(2-)), and phosphate (PO4(3-)), were analyzed and compared with standard permissible limits to assess the best-designated use of the river water for various purposes. The river in Delhi upstream was of better quality whereas the Delhi downstream stretch was polluted as indicated by very low DO and high total dissolved solids (TDS), electric conductivity (EC), total hardness, Na+, K+, Cl-, F- and SO4(2-). The differences in various parameters were statistically significant (p < 0.01) when compared for the Delhi upstream and downstream stretches of the river, particularly in summer. DO and TDS were found to be two important parameters, which showed strong correlation with several other parameters and hence can serve as good indices of river water quality. The river tended to recover from the pollution stress after flowing through a distance of about 80 km downstream of Delhi.

Questionnaires are frequently used in quantitative marketing research and social research. A questionnaire is a series of questions asked to individuals to obtain statistically useful information about a given topic. When properly constructed and responsibly administered, questionnaires become a vital instrument by which statements can be made about specific groups or people or entire populations. They are a valuable method of collecting a wide range of information from a large number of individuals, often referred to as respondents. Adequate questionnaire construction is critical to the success of a survey. Appropriate questions, correct ordering of questions, correct scaling, or good questionnaire format can make the survey worthwhile, as it may accurately reflect the views and opinions of the participants. A useful method for checking a questionnaire and making sure it is accurately capturing the intended information is to pretest among a smaller subset of target respondents.

Daring Learning provides effective learning methods, such as practicing with the existence of relevant feedback, combining collaborative activities with independent learning. Learning in the classroom with a combination of online learning gives students more interest. This study aims to develop a study of the influence of Daring Learning on the interest in learning science of grade VI students at third Elementary School of Karanglo Tawangmangu. This research method consist 26 students using quasi-experimental methods (Quasi Experiments), the population divided into 2 classes including class VI A with 13 students and class VI B with 13 students. Sampling taken in class VI A as the experimental class and class VI B as the control class. The results showed that the learning process using the Daring Learning method especially in science at third Elementary School of Karanglo Tawangmangu had used interesting media, concluding that Daring Learning-based interactive learning media, students were increasingly enthusiastic and not boring especially in learning science using the Daring Learning method. Based on the research stated on the questionnaire responses of students with Daring Learning, it shows that the cateralization is agrees to allow Daring Learning method in third Elementary School of Karanglo Tawangmangu.

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Objective: The present study is an attempt to develop a method to determine sex from the skull with lateral cephalometric radiograph using discriminant function analysis. Study design:The superciliary ridges, frontal sinuses, sella, cranial base and mastoid process were adopted as objects of lateral radiographic cephalometric measurements. The present study included cephalometric radiographs of 100 Indian adults chosen randomly from the records, each cephalometric radiograph was traced and nine linear and five angular measurements and one proportion were recorded for each case.Results: Using the discriminant functional analysis, the randomly chosen 100 adult patient cephalometric radiographs were classified into two sexual groups 84% of accuracy. Conclusion:From the results of the present study, it may be concluded that sex determination can be done with greater reliability.