209 research outputs found
Intramolecular rhodium carbenoid insertions into aromatic C-H bonds. Preparation of 1-carboalkoxy-1,3-dihydrobenzo[c]thiophene 2,2-dioxides
No full textPT: J; CR: ABRAMOVITCH RA, 1972, J CHEM SOC CHEM COMM, P893 CAVA MP, 1959, J AM CHEM SOC, V81, P4266 COREY EJ, 1965, TETRAHEDRON LETT, P793 COREY EJ, 1965, TETRAHEDRON LETT, P803 GAUTHIER JY, 1986, TETRAHEDRON LETT, V27, P15 JEFFORD CW, 1985, TETRAHEDRON LETT, V26, P6035 MILLS ML, 1964, J ORG CHEM, V29, P2329 NICOLAOU KC, 1980, J ORG CHEM, V45, P1463 OPPOLZER W, 1980, HELV CHIM ACTA, V63, P1703 OPPOLZER W, 1980, HETEROCYCLES, V14, P1615 PIRRUNG MC, 1986, 192ND ACS NAT M REGITZ M, 1972, SYNTHESIS-STUTTGART, P351 STORFLOR H, 1984, J CHEM SOC CHEM COMM, P208 TAYLOR EC, 1983, TETRAHEDRON LETT, V24, P5453 VANLEUSEN AM, 1970, Q REP SULFUR CHEM, V5, P67; NR: 15; TC: 18; J9: TETRAHEDRON LETT; PG: 4; GA: E9407Source type: Electronic(1
Convergence of graphical programming and text processing
No full textThesis (M. Eng. and S.B.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2006.This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.Includes bibliographical references (leaves 67-68).StarLogo TNG is a robust graphical programming environment for secondary students. Despite the educational advantages of graphical programming, TNG has sustained criticism from some who object to the exclusion of a textual language. Recognizing the benefits of text processing and the power of controlling software with a keyboard, I sought to incorporate text-processing techniques into TNG's graphical language. The key component of this work is an innovation dubbed "Typeblocking," by which users construct block code through the use of a keyboard.by Corey McCaffrey.M.Eng.and S.B
LGBTQIA+ Needs in Temporary Living Communities
No full textTemporary Living Communities (TLCs) are one of the biggest providers of housing for LGBTQIA+ (Lesbian, Gay, Bisexual, Transgender, Queer, Intersex, Asexual, plus additional identities not listed in this acronym) folk, with LGBTQIA+ youth being the most likely demographic to identify as homeless. For brevity and clarity, this paper will refer to the LGBTQIA+ population by the word “queer” (although this term may appear offensive to some, many queer individuals have reclaimed this term as a way to take power away from their oppressors by making the meaning positive instead of negative. I will be using the positive version of this term as well in my paper). Previous studies have estimated between 11 and 40 percent of all homeless youth identify as queer (Ventimiglia, 2012; Cochran, Stewart, & Ginzler, 2002). However, this number is hard to define due to the lack of a nationwide study (Whitbeck, Chen, Hoyt, Tyler, & Johnson, 2004) and because many disadvantaged queer youth do not disclose their identities because of the stigma of identifying as queer and possibly not wanting to risk being outed to their peers (Berberet, 2006). I want to investigate this topic deeper by examining how TLCs in the United States affect queer youth and if they adequately support their transition to being functional members in their communities.University of Wisconsin--Stout. Office of Research and Sponsored Program
VIBRATIONAL PREDISSOCIATION OF ( (m+n 1; m,n 1) FROM 2.5 TO 3.0 MICRONS
No full textAuthor Institution: Department of Chemistry, University of Ellinois at Urbana-ChampaignThe vibrational predissociation spectra of ( (m + n 1; m, n 1), recorded between 3250 - , will be discussed and compared with clusters, (, that do not contain any acetone molecules (n=0). Acetone is not infrared active in this spectral region, but is capable of participating in strong hydrogen bonds with methanol. Any change in the spectra between and can be attributed to the influence of one or more acetone molecules. As in the case of clusters, the smaller cluster sizes show an absorption around , which is attributed to mathanols with ‘free’ O-H groups. Methanols acting as proton donors to other acetone or methanol molecules absorb below . The structural impact due to the presence of one or more acetones will be discussed
VIBRATIONAL PREDISSOCIATION OF (m (m=2-7) FROM 2.5 TO 3.0 MICRONS.
No full textAuthor Institution: Department of Chemistry, University of Illinois at Urbana-ChampaignThe vibrational predissociation spectra of (m (m=2-7) clusters were recorded in the frequency range of 2.5 to 3.0 m, corresponding to the stretch of the O-H funcitonal group in methanol. Hydrogen bonding between two methanols, as in the case of the gas phase dimer, results in two inequivalent methanols, a proton donor and acceptor. The oscillator strength and the frequency of the proton donating methanol are strongly perturbed by the hydrogen bond. Vibrational predissociation induced through excitation of the O-H group can be used to observe the presence of hydrogen bonding. Transitions were observed around for all of the cluster ions studied. This feature is attributed to methanols with the O-H groups that are not acting as proton donors in a hydrogen bond. For clusters of size m 5, absorption features were observed below which correspond to methanols with proton-donating O-H groups. The spectra will be discussed along with structural implications. For comparison data from ( cluster ions will also be briefly presented
Localizing, modeling, and drifting an autonomous RACECAR
No full textThesis: M. Eng., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2018.This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.Cataloged from student-submitted PDF version of thesis.Includes bibliographical references (pages 103-105).In this thesis, I discuss several topics which are core to the development of car-like autonomous systems, using the small scale autonomous RACECAR platform as a testbed. The ultimate goal of this work was to create an autonomously drifting car, which has been achieved with nonlinear trajectory optimization, and time-varying LQR trajectory tracking. Topics include a discussion of the RACECAR platform, dynamics modeling of car-like systems, robot localization, autonomous RACECAR control, and the design of a custom RACECAR simulator. In developing a high performance particle filter localization algorithm, I designed and implemented a novel algorithm for high performance two-dimensional ray casting in occupancy grid maps, called the Compressed Directional Distance Transform (CDDT). Here, I will discuss the theory and characteristics of the CDDT algorithm, which has been implemented in RangeLibc, my open-source software library.by Corey H. Walsh.M. Eng
Geographic profiling in Nazi Berlin: fact and fiction
No full textGeographic profiling uses the locations of connected crime sites to make inferences about the probable location of the offender’s ‘anchor point’ (usually a home, but sometimes a workplace). We show how the basic ideas of the method were used in a Gestapo investigation that formed the basis of a classic German novel about domestic resistance to the Nazis during the Second World War. We use modern techniques to re-analyse this case, and show that these successfully locate the Berlin home address of Otto and Elise Hampel, who had distributed hundreds of anti-Nazi postcards, after analysing just 34 of the 214 incidents that took place before their arrest. Our study provides the first empirical evidence to support the suggestion that analysis of minor terrorism-related acts such as graffiti and theft could be used to help locate terrorist bases before more serious incidents occur
An overview of group work and implications for school counselors
No full textIncludes bibliographical references
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