experimental methodology is developed to accurately measure the effective radii of unfwused, circular plane piston transducers. The transient and steady-state relations [ 11 for the various maxima and minima diffraction concepts described by Lord are also used to propose an extension of the definition of the A " E M A pulse intensity integral to properly analyze cw and tone burst data. Using an...

Mobile Learning has a potential to improve efficiency in the education sector and expand educational opportunities to underserved remote area in higher learning institutions. However there are multi challenges in different altitude faced when introducing and implementing m-learning. Despite the evolution of technology changes in education, unfocused issues are security management even though st...

A crystal bender for sagittal focusing has been designed for standard monochromators at SPring-8. The bender does not move the position of the crystal center when the bending radius is changed. Sagittal focusing from 40 keV to 60 keV was achieved by using Si(311) double crystals. The flux density of the focused beam measured at 40 keV was 15 times higher than that of the unfocused beam. The hei...

This is an acoustic study of prosodic effects on segmental durations with reference to syllable structure, stress, focus and tempo in Greek. Disyllabic nonsense words with one, or two, or three consonants in the initial syllable were examined in stressed/unstressed, focused/unfocused and normal/fast tempo productions in a carrier sentence contexts. The results indicate that: (1) syllabic onset ...

We introduce a method for detecting whether two users are engaged in focused interaction using a windowed correlation measure on their acoustic signals, assuming that a continued exchange of verbal turns contributes to anticorrelation of acoustic activity. We tested our method with manually annotated transitions between focused and unfocused interaction stemming from experiments on AR-based coo...

since the emergence of the process-oriented approach to second language writing instruction two main questions have been what and how error feedback should be given to the students. the question of whether teachers should provide feedback on grammar in the writing assignments of english as a foreign language students, and if so how, has been a matter of considerable debate in the field of secon...

the present study-both qualitative and quantitative--explored fifty efl learners’ preferences for receiving error feedback on different grammatical units as well as their beliefs about teacher feedback strategies. the study also examined the effect of the students’ level of writing ability on their views about the importance of teacher feedback on different error types. data was gathered throug...

In this paper, a new generalized maximum integration angle for ISAR imaging system before uncorrected rotation produces defocusing in cross-range is presented which is in terms of allowable two-way phase deviation. It is assumed that the radar is in the far field of the target so that no significant range deviation exists over the target’s cross-range extent. What remains is the range deviation...

SMEs in the wholesale and retail industry are impacted by enormous changes in their business processes. Ecommerce-related developments have reduced the importance of physical branches and changed the demands by customers for products and services. This paper analyzes the differences among SMEs in the distribution sector in four countries based on empirical data collected via a survey. Best prac...

Population surveys concerning 'risk behaviours' thought to be related to the AIDS epidemic are many. Nevertheless, unfocused inquiry into diffuse behaviours in undifferentiated populations is not productive in low-seroprevalence populations, especially when the point is to design some form of intervention that might actually avert further infection. This is because of a failure to distinguish ...