Solar Models of Low Neutrino-Counting Rate: The Central Black Hole

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 stars are discussed

Solar Models of Low Neutrino-Counting Rate: The Depleted Maxwellian Tail

Evolutionary sequences for the sun are presented which confirm that the Cl-37 neutrino counting rate will be greatly reduced if the high-energy tail of the Maxwellian distribution of relative energies is progressively depleted. Thermonuclear reaction rates and pressure are reevaluated for a distribution function modified by the correction factor suggested by Clayton (1974), and the effect of the results on solar models calculated with a simple Henyey code is discussed. It is shown that if the depletion is characterized by a certain exponential dependence on the distribution function, the counting rate will fall below 1 SNU for a distribution function of not less than 0.01. Suggestions are made for measuring the distribution function in the sun by means of neutrino spectroscopy and photography

REMOTE ANALYSIS OF HIGH-TRITIUM-CONTENT WATER

Systems to safely analyze for tritium in moisture collected from glovebox atmospheres are being developed for use at Savannah River Site (SRS) tritium facilities. Analysis results will guide whether the material contains sufficient tritium for economical recovery, or whether it should be stabilized for disposal as waste. In order to minimize potential radiation exposures that could occur in handling and diluting high-tritium-content water, SRS sought alternatives to the process laboratory's routine analysis by liquid-scintillation counting. The newer systems determine tritium concentrations by measuring bremsstrahlung radiation induced by low-energy beta interactions. One of the systems determines tritium activity in liquid streams, the other determines tritium activity in water vapor. Topics discussed include counting results obtained by modeling and laboratory testing and corrections that are made for low-energy photon attenuation

Brainstem Auditory Evoked Potentials' Diagnostic Accuracy for Hearing Loss: Systematic Review and Meta-Analysis

Background: Microvascular decompression (MVD) utilizes brainstem auditory evoked potential (BAEP) intraoperative monitoring to reduce the risk of iatrogenic hearing loss. Studies report varying efficacy and hearing loss rates during MVD with intraoperative monitoring. Objectives: This study aims to perform a comprehensive review and study of diagnostic accuracy of BAEPs during MVD to predict hearing loss in studies published from January 1984 to December 2013. Methods: The PubMed/MEDLINE and World Science databases were searched. Studies performed MVD for trigeminal neuralgia, hemifacial spasm, glossopharyngeal neuralgia or geniculate neuralgia and monitored intraoperative BAEPs to prevent hearing loss. Retrospectively, BAEP parameters were compared with postoperative hearing. The diagnostic accuracy of significant change in BAEPs, which includes loss of response, was tested using summary receiver operative curve and diagnostic odds ratio (DOR). Results: A total of 13 studies were included in the analysis with a total of 2,540 cases. Loss of response pooled sensitivity, specificity, and DOR with 95% confidence interval being 74% (60–84%), 98% (88–100%), and 69.3 (18.2–263%), respectively. The similar significant change results were 88% (77–94%), 63% (40–81%), and 9.1 (3.9–21.6%). Conclusion: Patients with hearing loss after MVD are more likely to have shown loss of BAEP responses intraoperatively. Loss of responses has high specificity in evaluating hearing loss. Patients undergoing MVD should have BAEP monitoring to prevent hearing loss

Observations of Particulates within the North Atlantic Flight Corridor: POLINAT 2, September-October 1997

This paper discusses particulate concentration and size distribution data gathered using the University of Missouri-Rolla Mobile Aerosol Sampling System (UMR-MASS), and used to investigate the southern extent of the eastern end of the North Atlantic Flight Corridor (NAFC) during project Pollution From Aircraft Emissions in the North Atlantic Flight Corridor/Subsonic Assessment (SASS) Ozone and Nitrogen Oxide Experiment (POLINAT 2/SONEX) from September 19 to October 23, 1997. The analysis presented in this paper focuses on the corridor effect, or enhancement of pollutants by jet aircraft combustion events. To investigate the phenomena, both vertical and horizontal profiles of the corridor, and regions immediately adjacent to the corridor, were performed. The profiles showed a time-dependent enhancement of particulates within the corridor, and a nonvolatile (with respect to thermal volatilization at 300° C) aerosol enhancement at corridor altitudes by a factor of 3.6. The southern extent of the North Atlantic Flight Corridor was established from a four flight average of the particulate data and yielded a boundary near 42.5° N during the study period. A size distribution analysis of the nonvolatile particulates revealed an enhancement in the \u3c40 nm particulates for size distributions recorded within the flight corridor

Ursinus College Alumni Journal, March 1959

President\u27s page • Radioactivity detection in civil defense course • From the Dean\u27s office • University of the Air • From the Office of Admissions • The library • Industrial gift trend is up • G. E. corporate alumnus program • duPont renews $4000 grant •$2000 Esso education foundation grant • Regional groups plan meetings • Philadelphia alumni install 1959 officers • South Jersey alumni plan supper party • New York alumni plan spring dinner • Washington D.C. alumni plan annual dinner • York alumni elect new officers for 1959 • Ursinus Woman\u27s Club plans spring card party • Alumni Day, Saturday, June 6 • Donald Schultz, \u2750 wilderness medic • 1901 schoolgirl driver Rhea Duryea Johnson \u2708 • International educator, scholar and editor, Jacob Foose \u2732 • January 1959 mid year report of the Loyalty Fund Campaign • Mid campaign report • Alumni elections: Watch for your ballot in April • Requests • Football 1958 • Wrestling 1959 • Alumnae hockey 1958 • Alumnae finish undefeated for second year • Proposed amended constitution • News about ourselves • Weddings • Births • Necrology • Chase Manhattan Bank employee gift matching • Saturday, June 6, 1959: Alumni festivalhttps://digitalcommons.ursinus.edu/alumnijournal/1067/thumbnail.jp

Ursinus College Alumni Journal, July 1959

President\u27s page • D. L. Helfferich received LL.D. • 172 graduate at 90th commencement • Dr. Paul Miller commencement speaker • Dr. Sieb Pancoast resigns as Ursinus Dean of Men • Admissions office expects 250 freshmen in \u2763 class • Mr. Wilcox received doctorate from Penn • Rev. Jerry William Trexler speaker at Baccalaureate • Dean Camilla B. Stahr retires - Dean of Women since 1938 • Ralph Strassburger leaves half of his estate to charity • Ruth H. Rothenberger, \u2736 - new Dean of Women • Ursinus College has outstanding Loyalty Fund record • Rev. Richard Schellhase \u2745 - new Alumni Exec. Sec. • Festive Alumni Day brings large crowd • Paul I. Guest reelected alumni president • New York regional alumni elect new officers • The Collegeville Summer Assembly • May Day • Overseas job opportunities • Ursinus Women\u27s Club activities • Class \u2759 elects permanent officers • Old Timer\u27s Day Saturday November 7 • College teachers recognized • Baseball 1959 • 1959 track season • Ursinus girls complete undefeated spring • Lacrosse • National honors for Crosley • Softball • Tennis • News about ourselves • Weddings • Birthshttps://digitalcommons.ursinus.edu/alumnijournal/1064/thumbnail.jp

Ursinus College Alumni Journal, July 1960

President\u27s page • Dr. Paisley completes fifty years as President of the Board of Directors • Dr. McClure salutes Dr. Paisley • Senator Hugh Scott speaks at commencement • Horton preaches Baccalaureate sermon • Mrs. Omwake honored • 1960 Loyalty Fund • Dr. Boswell retires • Four professors given Bear Awards • Memorial minute • Faculty notes • A student reviews the past year at Ursinus • Alumni Day • Alumni elections • Thompson receives award • Admissions\u27 problems • Ursinus experiments in Swedish • Commencement Day • Colonel Campbell, \u2760 • The generous American • 1960 Loyalty Fund breaks all records • Lost alumni • The alumnus / alumna • A defense for the Alumni Association • Edward L. French, \u2738 • Paul E. Elicker, \u2714 • Warren K. Hess, \u2731 • Ursinus sends Morgan to NCAA track trials • Best track season in Ursinus history • Baseball review • Varsity Club news • Ursinus faces rebuilding job • Girls\u27 spring sports • Calling all grumblers • News about ourselves • Necrology • Weddings • Births • Ursinus captain\u27s chairhttps://digitalcommons.ursinus.edu/alumnijournal/1065/thumbnail.jp

Ursinus College Alumni Journal, November 1959

President\u27s page • President Helfferich honored • Office of Admissions • Founders\u27 Day • Chemistry at Ursinus • Ruth H. Rothenberger, \u2736 Dean of Women • Faculty summers • National Science Foundation grant • Whatley, Dean of Men and assistant football coach • A commentary: American arms policy • Critique • Seelye appointed to teach Spanish • Evening School • Directory to be sent to all living alumni • North Jersey-Shore regional organized • Old Timers\u27 Day • Schoolmen\u27s Week luncheon • Alumnae undefeated for third consecutive year • Impressions of Sweden • Among the Andean Indians • Wrestling • Hockey • Basketball • New coaches • Football • Six years of alumni sponsorship completed: $155,746 collected for Ursinus in this period • 1959 Loyalty Fund report • Loyalty Fund all-stars honored at banquet • Publicity • Honor roll by classes • Thomas Beddow, \u2736 Loyalty Fund chairman of the year • The last shall be first • Results of the 1959 Loyalty Fund campaign • Contributors for the 1959 Loyalty Fund campaign • News about ourselves • Ursinus Women\u27s Club executive board meets • Messiah to be presented • Weddings • Births • Necrologyhttps://digitalcommons.ursinus.edu/alumnijournal/1066/thumbnail.jp