In order to examine the accuracy of large amount of the field survey data with less accurate, an examination method based on multi-resolution satellite images was proposed in this paper. As there were so large amount of data, stratified random sampling was used to obtain effective samples. Firstly, vegetation index derived from low-resolution satellite images at different times has been adopted...

The past few decades have witnessed the rapid development of information and communication technology around the world, as well as continuing efforts to introduce technology into K12 schools. To gauge the success of integrating technology into classrooms, how end users, including teachers and students, accept and use technology while overcoming a new kind of digital gap needs to be investigated...

The purpose of this descriptive study was to investigate barriers to diffusion of Webbased distance education (WBDE) as perceived by faculty at China Agricultural University (CAU). Random and stratified sampling procedures were used to select participants for the study (N = 300). Data were collected on a printed questionnaire that was hand-delivered. Results showed that respondents tended to pe...

Adjustment is one of the most important psychological activities of human being. Life is a process of adjustment. If anyone wants satisfaction in life, then one has to adjust with their environment. The present study was conducted on the students of two collegesone urban and one rural of Jammu region. The main objective of the study was to identify the adjustment problems among college going st...

The study investigated the Internet Knowledge and use skills among clinical medical student in Delta State University using questionnaire to collect data. The descriptive survey design was employed for the study. A total of 120 students selected through stratified random sampling participated in the study. The findings revealed that a majority of the students access the Internet but a larger nu...

This study examined if, among families whose children were enrolled in the Ferst Foundation for Childhood Literacy, there was a relationship between the home literacy environment, measured by a scale survey, and the length of time enrolled in the program. Participants were a stratified random sampling from the population of parents in the State of Georgia whose children were enrolled in the Fer...

Time-stratified sampling of sediment for estimating suspended load is introduced and compared to selection at list time (SALT) sampling. Both methods provide unbiased estimates of load and variance. The magnitude of the variance of the two methods is compared using five storm populations of suspended sediment flux derived from turbidity data. Under like conditions, the SALT coefficient of varia...

Estimates of erosion and sediment delivery have often relied on measurements from locations that were selected to be representative of particular terrain types. Such judgement samples are likely to overestimate or underestimate the mean of the quantity of interest. Probability sampling can eliminate the bias due to sample selection, and it permits the explicit expression of uncertainty with est...