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On Strontium Isotopic Anomalies And Odd-A P-Process Abundances, Donald D. Clayton

Publications

Several aspects of the nucleosynthesis of Sr isotopes are considered in an attempt to shed light on the problem of the Sr isotopic anomalies discovered in an inclusion of the Allende meteorite. Decomposition of the Sr isotopes into average r-, s-, and p-process nucleosynthetic classes is performed. It is suggested that the Allende inclusion most likely has an excess of s-process Sr and that the initial Sr-87/Sr-86 isotopic ratio is probably slightly more primitive than basaltic achondrites. The results also show that Sn-115 is mostly due to the r-process and that odd-A yields are very small. It is concluded that …

Review Of Applied Urban Research 1978, Vol. 06, No. 07, Center For Public Affairs Research (Cpar)

Publications

This issue of Review of Applied Urban Research features "Bemis Park: A Study of Neighborhood Change," by Garneth O. Peterson.

The 1970's have been marked by a rebirth of inner city neighborhoods for commerce and housing. Developers in Boston, Washington and other cities have begun to rehabilitate old structures rather than destroy them, and thus preserve the visual character of neighborhoods. Residents of older neighborhoods have also banded together into homeowner's associations to lead the attempts to redevelop and rejuvenate their surroundings. 1 The viability of older central city neighborhoods has come to be recognized as essential to the economic …

Auxiliary Appendixes For Juvenile Justice Program Collaboration, Center For Public Affairs Research (Cpar)

Publications

This appendix contains: Auxiliary Tables; Rationale of Organizational Analysis of Local Agencies Involved in the Juvenile Justice Collaborations; Research Instruments; Bibliography; and Internal Organization of Juvenile Justice Collaborations.

Mouse Spleen Lymphoblasts Generated In Vitro: Their Replication And Differentiation In Vitro*, Ralph M. Steinman, Steven J. Blumencranz, Beverly G. Machinger

Publications

[No abstract available]

Anatomy Of Germinal Centers In Mouse Spleen, With Special Reference To 'Follicular Dendritic Cells', Lei L. Chen, Judy Adams, Ralph M. Steinman

Publications

Lymphocyte proliferation in germinal centers (GC's) is thought to be triggered by antigen retained extracellularly on the surface of special 'dendritic' cells. The anatomy and function of these cells have not been studied directly or in detail. We therefore examined mouse spleen GC's developing in response to sheep erythrocyte stimulation. We found that distinctive 'follicular dendritic cells' (FDC's) were present in both the GC and adjacent mantle region of secondary follicles. The large, irregularly shaped nucleus, containing little heterochromatin, allowed for the light microscope (LM) identification of FDC's. By EM, the cell was stellate in shape sending out long, thin …

Distribution Of Horseradish Peroxidase (Hrp)- Anti-Hrp Immune Complexes In Mouse Spleen With Special Reference To Follicular Dendritic Cells, Lei L. Chen, Andrea M. Frank, Judy Adams, Ralph M. Steinman

Publications

The distribution of immune complexes has been studied in mouse spleen stimulated to contain many germinal centers (GC′s). Horseradish peroxidase (HRP)-anti-HRP complexes were used as an appropriately precise and sensitive model. We were primarily interested in the relative abilities of three cell types to interact with complexes: lymphocytes, macrophages, and follicular dendritic cells (FDC′s). The latter are distinctive, nonendocytic, stellate cells located primarily at the transition of mantle and GC zones of 2° lymphoid follicles (Chen, L. L., J. C. Adams, and R. M. Steinman, 1978, J. Cell Biol. 77: 148). Binding of immune complexes to lymphocytes could not be …

Mouse Spleen Lymphoblasts Generated In Vitro: Recovery In High Yield And Purity After Floatation In Dense Bovine Plasma Albumin Solutions*, Ralph M. Steinman, Beverly G. Machinger, Jerrold Fried

Publications

[No abstract available]

Saudi Arabia Sociological Research Project, Ralph H. Todd, David W. Hinton, Genevieve Burch, Armin K. Ludwig, Jack Ruff

Publications

The Center for Applied Urban Research under contract to the Leo A. Daly Company agreed to provide specific research services regarding housing and community needs and desires of the Saudi Arabia National Guard (SANG). The specific objective of the study was to provide a sociological profile through survey research of the National Guard officer and enlistee, and where married of the officer/enlistee's family and/or dependents. The profile was to include such general variables as family size, sex, extended family, family mobility, and the role of elders and youth. The outcome of the study was to assist Leo A. Daly Company …

An Annotated Bibliography On Children Of Divorce, Jane D. Woody

Publications

Articles and chapters and books relating to children of divorced parents.

Review Of Applied Urban Research 1977, Vol. 05, No. 10, Center For Public Affairs Research (Cpar)

Publications

This issue of Review of Applied Urban Research features "Children in the Nebraska Courts," by Genevieve Burch.

for his treatment before, during and after the court appearance. In some instances a child is not represented by an attorney other than that of other family members. Often the case revolves around a question of custody, and whenever the court decision results in changes of family circumstances the consequences may be greatest for the child. Any delay in recognizing an error in a custody decision or in establishing permanent custody intensifies the psychological stress and may even endanger his physical well being. …

Isotopic Anomalies And Proton Irradiation In The Early Solar System, Donald D. Clayton, Eliahu Dwek, S E. Woosley

Publications

Nuclear cross sections relevant to the various isotopic-abundance anomalies found in solar-system objects are evaluated in an attempt to set constraints on the hypothesized mechanism of irradiation of forming planetesimals by energetic protons from the young sun. A power-law proton spectrum is adopted, attention is restricted to proton energies less than about 20 MeV, and average cross sections are calculated for several reactions that might be expected to lead to the observed anomalies. The following specific anomalies are examined in detail: Al-26, Na-22, Xe-126, I-129, Kr-80, V-50, Nb-92, La-138, Ta-180, Hg-196, K-40, Ar-36, O-17, O-18, N-15, C-13, Li, Be, and …

Women In Astronomy In The United States 1875-1920, Pamela Etter Mack

Publications

In the period from about 1875 to 1920 (the dates are only intended to be approximate) more than 164 women held astronomical jobs in the United States, and a few became famous for important scientific contributions. This seems surprising at first, because it is not a period in which many opportunities were open to women, particularly for intellectual pursuits. This thesis will examine the development of a role for women in astronomy and the reasons for the acceptance of women into this field. The goal is to show how the scientific work done by the women astronomers was affected by …

Author's Reply: Extinct Radioactivities As Trapped Residuals Of Presolar Grains, Donald D. Clayton

Publications

Trivedi's attempted disproof of presolar grains as carriers of special 129Xe* in meteorites is rejected on three grounds: (1) the high-T losses of 129Xe* and 1271 are tightly correlated, (2) the sharply isochronous meteorites are partially differentiated but not truly metamorphosed, and (3) evidence that much of solar 129Xe was trapped in presolar grains has strengthened the plausibility of the presolar-grain picture.

Review Of Applied Urban Research 1978, Vol. 06, No. 01, Center For Public Affairs Research (Cpar)

Publications

This issue of Review of Applied Urban Research features "Property Taxation: A Case for Reform," by Ralph H. Todd.

National public opinion polls taken annually during the past five years by the Advisory Commission on Intergovernmental Relations have consistently and decisively shown the most unpopular of all taxes to be the property tax.¹ Why is the property tax so unpopular?

Review Of Applied Urban Research 1977, Vol. 05, No. 01, Center For Public Affairs Research (Cpar)

Publications

This issue of Review of Applied Urban Research features "A Demographic Analysis of the Omaha Jewish Community" by Murray Frost.

The 1970 Census asked no questions about religious identification and therefore a religious community must make its own studies to determine the characteristics of its population. A study conducted for the Omaha Jewish Federation by the Center for Applied Urban Research provided this data for the Omaha Jewish community.

This report presents data from a ten-page questionnaire mailed in Fall 1975 to all households on the "community list" maintained by the Omaha Jewish Federation. Responses were received from 1,165 of …

In Praise Of Diversity: Multicultural Classroom Applications, Gloria Grant, Floyd T. Waterman

Publications

In Praise of Diversity: Multicultural Classroom Applications was written for the classroom teacher who is interested in implementing multicultural education. The book includes 51 activities written in the following subject areas: Social Studies, Language Arts, Science/Math and Art. Included within the activities are two units. A mini-unit on "Understanding Feelings" will assist the student in examining himself/herself and his/her relationships with others; and a unit entitled "Immigration and Migration: Voluntary and Forced" will provide the teacher with an illustrative procedure to incorporate ideas and materials from the Vignettes in the companion document, In Praise of Diversity: A Resource Book for …

American Indian Courts And Tribal Self-Government, Richard B. Collins, Ralph W. Johnson, Kathy Imig Perkins

Publications

No abstract provided.

Book Review, Charles F. Wilkinson

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No abstract provided.

An Essay On The Determination Of Relevancy Under The Federal Rules Of Evidence, Arthur H. Travers Jr.

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The scope of the general definition of "relevant evidence" in the Federal Rules of Evidence is ambiguous. It is unclear whether Congress, for instance, intended that certain issues be considered legislatively determined or that those issues rest within the discretion of the courts. There is also some uncertainty over the definition's applicability to several types of evidence--particularly undisputed facts such as those that provide background information or are judicially admitted.

Review Of Applied Urban Research 1976, Vol. 04, No. 12, Center For Public Affairs Research (Cpar)

Publications

This issue of Review of Applied Urban Research features "Economic Status in Midcontinent Metropolitan Areas, Third Quarter 1976," by Ralph H. Todd.

During the third quarter of 1976, Midcontinent metropolitan areas experienced the most universal decline in unemployment rates since the monitoring system was initiated for the fourth quarter of 1975. September unemployment rates in all 25 areas were lower than the United States rate, which declined from 8.1 percent during September of 1975 to 7.4 during September of 1976. Only Fargo, Rapid City and Cheyenne experienced unemployment rates higher than during September of 1975. The increase in average weekly …

Review Of Applied Urban Research 1976, Vol. 04, No. 06, Center For Public Affairs Research (Cpar)

Publications

This issue of Review of Applied Urban Research features "Mid-Continent City Crime Rates: A Multivariate Analysis," by Ralph H. Todd.

Preliminary crime data (1975) provided the basis for analysis of variations in major crime among cities of the MidContinent Region. The Uniform Crime Reports measure seven Crime Index Offenses: murder, forcible rape, robbery, aggravated assault, burglary, larceny-theft and motor vehicle theft. Remaining criminal offenses were not considered in this study. Crime rates per 100,000 population were compiled using the FBI Uniform Crime Reports and current population estimates (Table 1 ).

Gamma-Ray Emission And Nucleosynthesis Of Lithium By Young Pulsars, Donald D. Clayton, Eliahu Dwek

Publications

We propose that 7Li is produced in the Galaxy primarily by α-α collisions surrounding newly born pulsars. About 10 percent of the pulsar energy losses are converted to medium-energy α-particles which collide in a dominantly He nebula. The problem of the origin of lithium would be solved by the scenario, and clear-cut tests by nuclear γ-ray astronomy are described.

S-Process Studies: Branching And The Time Scale, Richard A. Ward, Michael J. Newman, Donald D. Clayton

Publications

The theory of S-process heavy-element formation is reformulated to allow for competition between beta decay and neutron capture at various nuclei along the path. Solutions to the resulting branching network equations are presented (under the assumption of constant temperature and neutron flux) that do not require steady flow for the neutron current. Using the exponential exposure distribution rho (tau) =G exp(-tau/tau0) and recently calculated temperature-dependent beta-decay rates, comparison of several key branches yields the following average conditions for the solar-system S-process environment: Tapprox. =3.1 x 108 K, n/subn/approx. =1.6 x 107 neutrons cm-3. For tau0=0.25 n mb-1 we find that …

Grains Of Anomalous Isotopic Composition From Novae, Donald D. Clayton, Fred Hoyle

Publications

We study the effects of grain formation in nova ejecta with double purpose: (1) to schematically model the optical and infrared luminosities, (2) to identify the anomalies of isotopic composition that should be present in large abundance in these grains. The large carbon concentration makes the rapid and efficient grain formation possible, and accounts for the peculiar luminosities observed in Nova Serpentis 1970. In the anticipated range of nova conditions, rapid addition of hot protons during the outburst produces large overabundances of 13C, 18O, 22Na, 26Al, 30Si, and perhaps others. Anomalous 14C is expected subsequent to the 13C (α,n)16O reaction, …

Membrane Flow During Pinocytosis: A Stereologic Analysis, Ralph M. Steinman, Scott E. Brodie, Zanvil A. Cohn

Publications

HRP has been used as a cytochemical marker for a sterelogic analysis of pinocytic vesicles and secondary lysosomes in cultivated macrophages and L cells. Evidence is presented that the diaminobenzidine technique (a) detects all vaculoes containing encyme and (b) distinguishes between incoming pinocytic vesicles and those which have fused with pre-existing lysosomes to form secondary lososomes. The HRP reactive pinocytic vesicle spaces fills completely within 5 min after exposure to enzyme, while the secondary lysosome compartment is saturated in 45-60 min. The size distribution of sectioned (profile) vaculoe diameters was measured at equilibrium and converted to actual (spherical) dimensions using …

Presidential Exemption From Mandatory Retirement Of Members Of The Independent Regulatory Commissions, Harold H. Bruff

Publications

No abstract provided.

Nepa's First Amendment: An Erosion, Mark Squillace, Paul W. Shapiro

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No abstract provided.

Solar Models Of Low Neutrino-Counting Rate: The Central Black Hole, Donald D. Clayton, Eliahu Dwek, Michael J. Newman, Raymond J. Talbot Jr.

Publications

Partial evolutionary sequences have been calculated for several solar models with central black holes of the order of one hundred-thousandth of a solar mass. If these are assumed to radiate their Eddington-limiting luminosity, the central temperature is depressed to the extent that the predicted count rate for the Cl-36 solar neutrino experiment nears the current upper limit of 1 SNU. This occurs when the auxiliary energy source provides about half of the solar luminosity. Count rates below this limit would result from an even larger black-hole luminosity. Consequences for stellar evolution of the occasional presence of black holes inside normal …

Review Of Applied Urban Research 1975, Vol. 03, No. 10, Center For Public Affairs Research (Cpar)

Publications

This issue of Review of Applied Urban Research features "A Geographical Approach to Residential Construction Cost Structure," by Gary K. Higgs and William H. Cheek.

The single-family residence is generally the largest and most important purchase of any household unit. Those employed in building these residences also constitute a large proportion of the domestic construction industry and the unique emotional status of a home has made the residence construction and related industries one of the principal material economic indicators.

Review Of Applied Urban Research 1975, Vol. 03, No. 09, Center For Public Affairs Research (Cpar)

Publications

This issue of Review of Applied Urban Research features "Education in Nebraska: Fifth Annual Report."

This report represents a compilation of the most recent data made available by governmental and nongovernmental sources. The report contains information on a wide variety of subjects, including school enrollments, student withdrawals, status and plans of high school and university graduates, and degrees conferred by the University of Nebraska System as well as other Omaha Area colleges and universities.