نتایج جستجو برای: fall and spring run
تعداد نتایج: 16847782 فیلتر نتایج به سال:
The seasonal occurrence of organic contaminants, many of which are potential endocrine disruptors, entering the Potomac River, USA, watershed was investigated using a two-pronged approach during the fall of 2005 and spring of 2006. Passive samplers (semipermeable membrane device and polar organic chemical integrative sampler [POCIS]) were deployed in tandem at sites above and below wastewater t...
Teacher organization is a crucial part of classroom functioning; however, its relation to student achievement has not been investigated as extensively as that of instruction. In this study, organization is defined as the amount of time teachers spend explaining the purpose and procedures of learning activities and daily routines. Data from first-grade classrooms (N=44) observed three times duri...
Variation in early life history traits often leads to differentially expressed morphological and behavioral phenotypes. We investigated whether variation in egg size and emergence timing influence subsequent morphology associated with migration timing in juvenile spring Chinook Salmon, Oncorhynchus tshawytscha. Based on evidence for a positive relationship between growth rate and migration timi...
Oleuropein contents (OLE) in leaves and fruits of from seven olive Syrian varieties harvested at spring and fall were determined by high-performance liquid chromatography. The results showed that, the concentration of OLE leaves samples measured in spring was higher than those determined in fall samples, where the OLE concentration in spring samples ranged between 5.6 9.2 mg/g. The highest conc...
Introduction O ver the last three years, the MIT Physics Department has been introducing major changes in the way that 8.02, Electromagnetism I, is taught at the Institute, through the TEAL (Technology Enhanced Active Learning) Project [Supported by the d'Arbeloff Fund for Excellence in MIT Education, the MIT/Microsoft iCampus Alliance, the MIT School of Science, and NSF] (Belcher 2001). After ...
This write-up is concerned with the intersections of tropical curves and their relationship to rational functions on graphs. It is based on projects for Bernd Sturmfel’s 255 course in Fall 2011, Martin Olsson’s 256B course in Spring 2012, and work with Matt Baker. Sections 2 and 3 run through previous results on tropical intersections in the transverse and non-transverse cases, respectively. Se...
Methods: Offensive linemen at a single collegiate institution wore bilateral shoulder-stabilizing braces for every contact practice and game beginning in the spring of 2013. Between spring of 2007 and fall of 2012, offensive linemen did not wear any shoulder braces. Player injury data were collected for all contact practices and games throughout these time periods to highlight differences with ...
This study examined associations among peer victimization, psychosocial problems, physical symptoms, and school functioning across the 1st year in middle school. An ethnically diverse sample of urban 6th graders (N=1,526) reported on their perceptions of peer victimization, psychosocial adjustment, and physical symptoms during fall and spring. Objective measures of school functioning (i.e., gra...
A suite of commercially available volatile compounds was tested in an olfactometer bioassay for responses by the crucifer flea beetle (Phyllotreta cruciferae). Flea beetles were inhibited by exposure to hexane, pentane, and ethanol. Allyl-isothiocyanate, a crucifer-specific volatile, was moderately attractive to spring and early fall flea beetles, but inhibitory to late fall flea beetles. Sprin...
The linac at the Stanford Linear Accelerator Center (SLAC) can provide beams to different experiments during PEP-II operations. It is planned to have a 30 GeV beam to the end of the linac into the FFTB (Final Focus Test Beam) area, where there will be two plasma experiments installed, which will demonstrate plasma focussing and plasma acceleration up to 1 GeV/m. The acceleration goes linear wit...
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