Abetract--The chemical composition of Dufour's gland secretions of 13 species of halictine bees was investigated. The secretions were composed of a series of macrocyclic lactones, hydrocarbons and isopentenyl esters. The number and relative intensities of these compounds were unevenly disu'ibuted among the species, i.e. the secretions were species specific. Based on the empirical date, an algor...

The Cutting Edge features news relevant to anthropologists and anthropological practice. In addition to material provided by Special AN Correspondents, submissions from the membership at large are welcomed for consideration. Please send short articles (500-700 wordr) to the Anthropology Newsletter Editor, 4350 N Fairfar Dr, Suite 640, Arlington, VA 22203; 7031528I902 ext 3005; f a r 70315283.54...

1.0 Binaural Directly from eardrum to eardrum 1 1.1 Binaural in practice 2 1.2 Quasi-binaural recording for loudspeaker playback 2 2.0 From mono to stereo by panning 4 2.1 Recording and rendering with paired microphones 6 2.2 Rendering below 1 kHz 10 2.3 Spaced microphones 13 2.4 Blending AB and XY recording techniques 15 3.0 Rendering in a reverberant environment 16 3.1 Loudspeaker placement 2...

The purpose of this state-of-the-art review is to provide a general overview recent research on time distribution and second language (L2) learning with special implications for classroom settings. Several studies have been performed examine how best distribute the hours L2 practice maximize by comparing conditions that promote intensive exposure versus others in which input or instruction more...

We describe an organizing principle for online learning materials; we term coherently organized digital exercises and expositions. Larger in scale than individual lessons but smaller a programme of study, this innovation instructional practice is increasingly guiding our thinking the development university mathematics courses. Essentially have taken book put it inside automatically assessed qui...

Trimming ERAD U biquitins are zip codes for proteins heading to the proteasome. But misfolded ER proteins must be deubiquitinated before they are degraded, as shown by Wang et al. on page 963. Misfolded ER proteins are sent back through the ER membrane into the cytosol by the p97 ATPase. Upon reaching the membrane’s cytosolic side, the substrates are modifi ed by ubiquitin ligases. Wang et al. ...

This study investigated the influence of practice distribution (i.e. spacing between sessions) on successful vocabulary learning by examining two different time distributions, i.e. 1-day (1-DS) vs. 7-day (7-DS) using a freely available computer-assisted language programme (Quizlet). The achieved high ecological validity through classroom-based with low proficiency second (L2) English learners a...

bioinformatics, through the sequencing of the full genomes for many species, is increasingly relying on efficient global alignment tools exhibiting both high sensitivity and specificity. many computational algorithms have been applied for solving the sequence alignment problem. dynamic programming, statistical methods, approximation and heuristic algorithms are the most common methods applied t...