10,944 research outputs found
Modeling NO and CO emissions in lean natural gas spark ignition engines
No full textThesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1996.Includes bibliographical references (p. 101-108).by Aaron D. Golub.M.S
Combined inclusive diffractive cross sections measured with forward proton spectrometers in deep inelastic ep scattering at HERA
No full textA combination of the inclusive diffractive cross section measurements made by the H1 and ZEUS Collaborations at HERA is presented. The analysis uses samples of diffractive deep inelastic ep scattering data at a centre-of-mass energy √s= 318 Gev where leading protons are detected by dedicated spectrometers. Correlations of systematic uncertainties are taken into account, resulting in an improved precision of the cross section measurement which reaches 6 % for the most precise points. The combined data cover the range 2.5 < Q 2 < 200 GeV 2 in photon virtuality, 0.00035 < xP < 0.09 in proton fractional momentum loss, 0.09 <{pipe}t{pipe}< 0.55 GeV 2 in squared four-momentum transfer at the proton vertex and 0.0018 < β <0.816 in β=x/xP, where x is the Bjorken scaling variable. © 2012 The Author(s)
Segmentation and alignment of speech and sketching in a design environment
No full textThesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2003.Includes bibliographical references (p. 203-205).This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.by Aaron D. Adler.M.Eng
Fig. 3. — Coffea sambavensis J.-F in Two new species of Coffea L. (Rubiaceae) from northern Madagascar
No full textFig. 3. — Coffea sambavensis J.-F. Leroy ex A.P. Davis & Rakotonas.: A, habit; B, domatia (adaxial view); C, inflorescence, with calyculi (corollas and styles fallen); D, flower; E, flower dissection; F, fruit; G, transverse section of fruit. A, B, Capuron 27706-SF; C-G, Davis & Rakotonasolo 2323.Published as part of Davis, Aaron P. & Rakotonasolo, Franck, 2001, Two new species of Coffea L. (Rubiaceae) from northern Madagascar, pp. 337-345 in Adansonia (3) 23 (2) on page 343, DOI: 10.5281/zenodo.518030
FIGURE 2. Cosmos ramirezianus Art. Castro, M. Harker et Aaron Rodr. A. Head, front view. C. Leaves. D. Phyllaries. F. Achenes and persistent paleae. A and D in Two new species of Cosmos section Discopoda (Coreopsideae: Asteraceae) from Jalisco, Mexico
No full textFIGURE 2. Cosmos ramirezianus Art. Castro, M. Harker et Aaron Rodr. A. Head, front view. C. Leaves. D. Phyllaries. F. Achenes and persistent paleae. A and D based on A. Frías & L. M. González-Villarreal 1864 (IBUG); C and F based on A. Castro-Castro & L. M. González-Villarreal 2295 (IBUG). Cosmos pseudoperfoliatus Art. Castro, M. Harker et Aaron Rodr. B. Head, front view. E. Head, lateral view. G. Leaves. H. Head, dorsal view [based on M. Harker et al. 4189 (IBUG holotype)].Published as part of Castro-Castro, Arturo, Harker, Mollie, Vargas-Amado, Georgina & Rodríguez, Aarón, 2013, Two new species of Cosmos section Discopoda (Coreopsideae: Asteraceae) from Jalisco, Mexico, pp. 35-49 in Phytotaxa 146 (2) on page 41, DOI: 10.11646/phytotaxa.146.2.1, http://zenodo.org/record/510015
Fig. 3. — Coffea ratsimamangae J.-F in Three new species of Coffea L. (Rubiaceae) from NE Madagascar
No full textFig. 3. — Coffea ratsimamangae J.-F. Leroy ex A.P. Davis & Rakotonas.: A, habit; B, leaf, showing position of domatia; C, inflorescence (showing basal, middle and upper calyculi, and calyx); D, flower; E, infructescence; F, detail of pedicel, with bractlets (fruiting stage); G, transverse section of fruit; H, seed, adaxial and abaxial view (left to right). A, E-H, Capuron 23323-SF; B-D, Capuron 23171-SF.Published as part of Davis, Aaron P. & Rakotonasolo, Franck, 2001, Three new species of Coffea L. (Rubiaceae) from NE Madagascar, pp. 137-146 in Adansonia (3) 23 (1) on page 144, DOI: 10.5281/zenodo.460498
Supplemental Material - Covering the Campaign: Computational Tools for Measuring Differences in Candidate and Party News Coverage With Application to an Emerging Democracy
No full textSupplemental Material for Covering the Campaign: Computational Tools for Measuring Differences in Candidate and Party News Coverage With Application to an Emerging Democracy by Aaron Erlich, Danielle F. Jung, and James D. Long in Social Science Computer Review.</p
Events with an Isolated Lepton and Missing Transverse Momentum and Measurement of W Production at HERA
No full textBinding Of Flexible And Constrained Ligands To The Grb2 Sh2 Domain: Structural Effects Of Ligand Preorganization
No full textStructures of the Grb2 SH2 domain complexed with a series of pseudopeptides containing flexible (benzyl succinate) and constrained (aryl cyclopropanedicarboxylate) replacements of the phosphotyrosine (pY) residue in tripeptides derived from Ac-pYXN-NH(2) (where X = V, I, E and Q) were elucidated by X-ray crystallography. Complexes of flexible/constrained pairs having the same pY + 1 amino acid were analyzed in order to ascertain what structural differences might be attributed to constraining the phosphotyrosine replacement. In this context, a given structural dissimilarity between complexes was considered to be significant if it was greater than the corresponding difference in complexes coexisting within the same asymmetric unit. The backbone atoms of the domain generally adopt a similar conformation and orientation relative to the ligands in the complexes of each flexible/constrained pair, although there are some significant differences in the relative orientations of several loop regions, most notably in the BC loop that forms part of the binding pocket for the phosphate group in the tyrosine replacements. These variations are greater in the set of complexes of constrained ligands than in the set of complexes of flexible ligands. The constrained ligands make more direct polar contacts to the domain than their flexible counterparts, whereas the more flexible ligand of each pair makes more single-water-mediated contacts to the domain; there was no correlation between the total number of protein-ligand contacts and whether the phosphotyrosine replacement of the ligand was preorganized. The observed differences in hydrophobic interactions between the complexes of each flexible/constrained ligand pair were generally similar to those observed upon comparing such contacts in coexisting complexes. The average adjusted B factors of the backbone atoms of the domain and loop regions are significantly greater in the complexes of constrained ligands than in the complexes of the corresponding flexible ligands, suggesting greater thermal motion in the crystalline state in the former complexes. There was no apparent correlation between variations in crystal packing and observed structural differences or similarities in the complexes of flexible and constrained ligands, but the possibility that crystal packing might result in structural variations cannot be rigorously excluded. Overall, it appears that there are more variations in the three-dimensional structure of the protein and the ligand in complexes of the constrained ligands than in those of their more flexible counterparts.National Institutes of Health (GM 84965)National Science Foundation (CHE 0750329)Robert AWelch Foundation (F-652)Norman Hackerman Advanced Research ProgramTexas Institute for Drug and Diagnostic DevelopmentWelch Foundation Grant #H-F-0032ChemistryBiochemistr
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