244 research outputs found
[Correspondence Between Melvin R. Jacobson and Barbara Jordan - February 8-15, 1978]
No full textCorrespondence between Melvin R. Jacobson and Barbara Jordan discussing Jordan's decision to not seek re-election. Jacobson expresses his concerns about what congress will look like without Jordan. Jordan discusses her decision and thanks Jacobson for his letter
Some Sufficient Conditions for the Jacobson Radical of a Commutative Ring with Identity to Contain a Prime Ideal
No full textThroughout, the word ring will abbreviate the phrase commutative ring with identity element 1 unless the contrary is stated explicitly. An ideal I of a ring R is called pseudoprime if ab = 0 implies a or b is in I. This term was introduced by C. Kohls and L. Gillman who observed that if I contains a prime ideal, then I is pseudoprime, but, in general, the converse need not hold. In [9 p. 233], M. Larsen, W. Lewis, and R. Shores ask if whenever the Jacobson radical J(R) of an arithmetical ring is pseudoprime, it follows that J(R) contains a prime ideal? In Section 2, I answer this question affirmatively. Indeed, if R is arithmetical and J(R) is pseudoprime, then the set N(R) of nilpotent elements of R is a prime ideal (Corollary 9). Along the way, necessary and sufficient conditions for J(R) to contain a prime ideal are obtained. In Section 3, I show that a class of rings introduced by A. Bouvier [1] are characterized by the property that every minimal prime ideal of R is contained in J(R). The remainder of the section is devoted to rings with pseudoprime Jacobson radical that satisfy a variety of chain conditions. In particular, it is shown that if R is a Noetherian multiplication ring with pseudoptime Jacobson radical J(R), then J(R) contains a unique minima] prime ideal (Theorem 20), but there is a NoetheIian semiprime ring R such that J(R) is pseudoprime and fails to contain a prime ideal (Example 21)
A new physics-based method for estimating the excess turbulence downstream of a structure
No full textErosion and sedimentation are natural processes that occur in natural flows.If the erosion is a threat for a structure, a bed protection is necessary to stop this process. A bed protection usually consists of relatively large stones.For calculating the required dimeter of the stones several formulae are available, of which the formula of Shields is the most well-known. In most of these formulae the required dimeter depends on the maximum flow velocity.Almost all flows in hydraulic engineering are turbulent. This means that the velocities are not constant in time, but fluctuating. Due to this irregular nature, the flows are described in a statistical way with a mean velocity and a standard deviation. This standard deviation is called turbulence. In a uniform flow, the amount of turbulent remains constant, but it increases rapidly just behind a hydraulic structure and decreases gradually further downstream. The situation that will be dealt with in this research is that of the Backward Facing Step. The turbulence is often represented as the amount of turbulent energy.If the relative turbulence is known, the maximum velocity can be calculated and from that follows the required stone diameter. Knowing the standard deviation of the velocities is therefore very important, since having too small stones can destroy the bed protection and too large stones are more expensive and their placement could lead to practical problems.Voortman (2013) came up with a new method to predict the turbulent energy, based on the energy cascade. He assumed that the dissipation rate of the turbulent energy depends on the amount of energy itself. Hoeve (2015) concluded, based on earlier experiments, that the method might work for the increase of turbulence, but that not enough data was available for calibrating the method for predicting the decrease of turbulence further downstream.For this reason, twelve new experiments were done in the Laboratory for Fluid Mechanics of the Delft University of Technology. The experiments consisted of a step and a certain combination of water depth, flow velocity and bed roughness behind the step. In these experiments, the flow velocities were measured at various locations and levels, so that the mean velocity and standard deviations at various locations are known.In combination with the measured water depths, the head levels and turbulent energy could be calculated at each location and from that the change in head level and turbulent energy could be calculated.The measurement data was obtained in both the deceleration zone and behind the reattachment point. After a careful analysis, it turned out that it is possible to describe the dissipation of the turbulence with an exponential function, as suggested by Voortman (2013).With the obtained data it should be possible in the near future to find a better link between the generation and dissipation of turbulent energy as well, leading to the creation of a new turbulence method and resulting in better bed protections.Civil Engineering | Hydraulic Engineerin
Correspondence from Hiram B. Clawson to Family, 1848-1894 [02]
No full textScans of letters from Hiram B. Clawson to his family, 1848-1894: (1) Letter dated 21 October 1885 by Hiram B. Clawson to his daughter Ruby Clawson when he was at Utah Penitentiary for practicing polygamy (4 pages); (2) Letter dated 23 August 1871 at San Francisco, California, by Bradley Clawson (Hiram Bradley Jr.) to his father, H. B. Clawson at Salt Lake City (3 pages); (3) Letter dated 1 November 1872 at New York City by Mollie E. Davies, addressed to a cousin, probably H. B. Clawson (2 pages); (4) Letter dated 20 June 1873 at Washington, D.C., by H. B. Clawson Jr. (Bradley) to his mother, Ellen C. Clawson (4 pages); (5) Letter dated 12 March 1878 at Bern, Switzerland, by Bradley Clawson, to his sister, Edna (6 pages); (6) Letter dated 7 June 1882 at Soda Springs, Idaho by Delle Clawson Cummings (wife of Melvin E. Cummings) to her mother, Ellen C. Clawson, in Salt Lake City (3 pages); (7) Letter dated 20 December 1881 at Mosiertown (Crawford Co., Pennsylvania) from Jane Davis to cousin Hiram B. Clawson and family (3 pages); (8) Letter dated 22 June 1883 at Mosiertown (Crawford Co., Pennsylvania) from Jane Davis to cousin Ellen C. Clawson (2 pages); (9) Letter dated 22 June 1883 at Mosiertown (Crawford Co., Pennsylvania) from Jane Davis to cousin Hiram B. Clawson (2 pages); (10) Letter dated 22 August 1894 at Salt Lake City by Ellen Tibbitts to her grandmother, Ellen S. Clawson (1 page); (11) Letter dated 12 June 1891 at Brighton (England?) by "Fred and Sid" to their aunt, Ellen S. Clawson at Salt Lake City (2 pages); (12) Letter in verse form dated 28 August 1894 at Soda Springs, Idaho, to Delle (Lucy Ardella Clawson) Cummings, by "her relatives," Jack, Joe, Jim, Bill, Mary, June, and Emily (2 pages); (13) Letter dated 30 August [no year] at Canaan, New York, by Esther Pomeroy, addressed to a cousin (probably Ellen S. Clawson); (14) Letter (undated) by Jenni B. Whipple to her friend Ellen S. Clawson (2 pages); (15) Letter dated 8 July (no year) at Mosiertown, Pennsylvania, by Jane Davis to cousin Hiram B. Clawson (2 pages); (16) Letter dated 25 August [no year] at Salt Lake City, Utah, to "sister Mattie" (1 page), author not state
Organizational improvements in the B-2A human factors engineering branch
No full textThis paper documents four specific organizational changes made by the author and the branch chief in the B-2 Human Factors engineering division between April 1994 and August 1994 in an attempt to improve the group's performance and effectiveness. The group's goal and mission were first redefined so individuals could focus on work that supported the attainment of these goals. The group's organizational structure was altered to include new lines of authority and clearer work responsibilities. A measurement system was also developed to lay the foundation for future productivity improvement and to help define the group's critical processes. Finally, a computerized optimization scheme was created to help prioritize human factors deficiencies on the B- 2 aircraft using a combination of workload techniques and linear programming. Improvement results from these four actions are also presented.Includes bibliographical references (leaf 58)California State University, Northridge. Department of Engineering
Declarations of the Sacred: An Autobiographical Glimpse into the Psyche of the English-Speaking Caribbean
No full textFor good or ill, in this essay I use aspects of my own experience as a matrix for my critical exploration of literature generally and Caribbean literature specifically. In the process I suggest maintain that parts of my own experience are paradigmatic of the condition of the English-speaking Caribbean. Therefore, the essay can be rightly regarded as my attempt to respond to the call of writers like Erna Brodber, Wilson Harris, Sylvia Wynter, Stephen Slemmons, and Paule Marshall for criticism that not only foregrounds the lived experience of Caribbean people but also finds its theoretic matrices within Caribbean. My personal story therefore becomes a cite for critical inquiry as well as the locus of conceptual data that I employ to probe for nuggets of my life's meaning
[Photograph 2012.201.B1289.1.0263]
No full textPhotograph used for a story in the Oklahoma Times newspaper. Caption: "Langston--Author-poet Melvin B. Tolson was announced by Tuskegee Institute in Alabama Friday as the first appointee to the "Avalon Foundation Chair in the Humanities.
Diasporas and democratization in the post-communist world
No full textIf diaspora communities are socialized with democratic values in Western societies, they could be expected to be sympathetic to the democratization of their home countries. However, there is a high degree of variation in their behavior. Contrary to the predominant understanding in the literature that diasporas act in exclusively nationalist ways, this article argues that they do engage with the democratization of their home countries. Various challenges to the sovereignty of their homelands explain whether diasporas involve with procedural or liberal aspects of democratization. Drawing evidence from the activities of the Ukrainian, Serbian, Albanian and Armenian diasporas after the end of communism, I argue that unless diasporas are linked to home countries that enjoy both international legal and domestic sovereignty, they will involve only with procedural aspects of democratization. Diasporas filter international pressure to democratize post-communist societies by utilizing democratic procedures to advance unresolved nationalist goals
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No full textDistinguished Alumni Award Program author. RDML Philip J. Coady Jr.USN (Ret) (Presented 27 Mar 06)The thesis considers the impact of return on investment, progress payments, and cash flow in the shipbuilding industry. Analysis is devoted to the progress payment method recommended by the Navy Task Group to Study Shipbuilding Progress Payments. An examination is made of both Government profit policy and contract financing as they relate to the shipbuilding industry. A computer model was developed which makes explicit the discounted cash flow in a given contract and displays all government payments to the contractor as well as the contractor's share of contract financing. The time-adjusted rate of return which is implied by the terms and conditions of the contract is computed by the model. A decision process for computing a profit negotiation position is developed which integrates (1) the IAC profit computation system, (2) the proposed shipbuilding progress payment method, and (3) the prevailing market conditions.NANAhttp://archive.org/details/considerationsof109451604
Fabrication of a standard bench vehicle seat. Volume I - basic report, appendixes A and B. Final report
No full textNotes: Report covers the period 5 March 1974 - 14 Sept 1974National Highway Traffic Safety Administration, Washington, D.C.http://deepblue.lib.umich.edu/bitstream/2027.42/1356/2/32094.0001.001.pd
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