About a Photograph: New York, 1967, by Garry Winogrand

I first met Garry Winogrand at the beginning of 1966. Although I was a dozen years younger than he was, we quickly became close friends and, soon enough, were photographing together on the streets of New York. In the beginning, I found this a little strange; for me, making photographs was something to be done in private, if only because it required such tremendous concentration to have any hope of doing it well. But I soon realized that meeting with Garry and walking the streets with him didn..

The Long-Run Impacts of Same-Race Teachers

Black primary-school students matched to a same-race teacher perform better on standardized tests and face more favorable teacher perceptions, yet little is known about the long-run, sustained impacts of student-teacher demographic match. We show that assigning a black male to a black teacher in the third, fourth, or fifth grades significantly reduces the probability that he drops out of high school, particularly among the most economically disadvantaged black males. Exposure to at least one black teacher in grades 3-5 also increases the likelihood that persistently low-income students of both sexes aspire to attend a four-year college. These findings are robust across administrative data from two states and multiple identification strategies, including an instrumental variables strategy that exploits within-school, intertemporal variation in the proportion of black teachers, family fixed-effects models that compare siblings who attended the same school, and the random assignment of students and teachers to classrooms created by the Project STAR class-size reduction experiment

Measuring marketing performance in South Africa

Bibliography: leaves 117-120Despite the growing global awareness and importance of marketing performance measurement, little research on the subject has been conducted from a South African perspective. This study explores the status of marketing performance measurement in South Africa, by examining the perceptions, methods, challenges and status of organisations with regards to the advancement of marketing performance measurement. It researches five key problem areas, namely, the importance and awareness of marketing performance measurement; the methods managers use to measure marketing performance; the process these managers follow in selecting these methods; how advanced organisations are conceptually and practically in terms of measuring marketing performance, and finally the challenges managers face in measuring marketing performance in South Africa. Nine managers from eight medium to large South African firms were interviewed, ina qualitative study that possibly explores marketing performance measurement from this perspective, for the first time in South Africa.Graduate School of Business LeadershipMB

Progress towards strong coupling between collisionally blockaded atoms and an optical cavity

Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Physics, 2009.Includes bibliographical references (p. 83-85).In this thesis, I present the motivation and design for an experiment in which to probe the interactions between an atom and a single photon light field. I discuss the relevant technical considerations and many of the physical phenomena that can be tested with this particular experimental system. In particular, I discuss the design, implementation, and control of a high finesse cavity overlapped with a 2pm dipole trap. The use of a relatively long (14mm) cavity grants good optical access, permitting the implementation of a dipole trap centered on the cavity, and small enough to capture only a single atom in the collisional blockade regime.by Alexander Themis Papageorge.S.B

Design of an electrical analog for spherical wave propagation in solid elastic media

With the advent of underground testing, the study of the propagation of seismic signals has become of great importance. This thesis investigates the design of electrical analogs to represent the propagation of seismic waves. The analogs developed allow for the study of the effects of variations in the characteristic constants of the medium through which the wave propagates and further allow for the characteristics of the source to be imposed upon the compressional displacement propagation. It is assumed that the source may be represented by a spherical radiator and by solving the wave equation in spherical coordinates, the transfer function for the wave is obtained. The design of the analog is based on this transfer function and through the use of network synthesis, a lumped element network is synthesized. Variation of the elements in the synthesized network will permit the study of the effects of variations in velocity. Poisson's ratio, range, size of the radiator, and excitation functions on the compressional wave propagation. To include the effects of multiple layering, a second analog was designed. This was accomplished by connecting, in tandem, analogs representing single layer of specified thickness. The individual stages of this analog were synthesized using a different method from the one used in the synthesis of the first analog in that they were terminated. The application of the second analog is restricted to the case for which we can assume, within reasonable error, that the spherical wave approaches a plane wave in character

Bichromatic Driving of a Solid State Cavity QED System

The bichromatic driving of a solid state cavity quantum electrodynamics system is used to probe cavity dressed state transitions and observe coherent interaction between the system and the light field. We theoretically demonstrate the higher order cavity-dressed states, supersplitting, and AC stark shift in a solid state system comprised of a quantum dot strongly coupled to a photonic crystal cavity for on- and far off-resonant cases. For the off-resonant case, phonons mediate off-resonant coupling between the quantum dot and the photonic resonator, a phenomenon unique to solid state cavity quantum electrodynamics.Comment: 8 pages 6 figure

Reduction of the number of elements in the synthesis of RC and RC-NIC networks

This paper is a study of the procedures used in achieving element reduction in networks realized from a given network function. Reduction in the number of elements in RC-realization is possible in the synthesis of a transfer function and in the simultaneous realization of driving-point function and a transfer function, through proper partitioning of the function and through realization of all possible network configurations respectively. Proper partioning of the specified polynomial in RC-NIC realization indicates the optimum expression for the selection of the auxiliary polynomials. The procedures developed for each form of RC-NIC synthesis will lead to the reduction of the number of elements in the realized networks

Recruitment, Development, and Retention of Dental Faculty in a Changing Environment

Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/153771/1/jddj002203372011751tb05026x.pd