Exploitation of a pH-sensitive hydrogel for CO2 detection

In this paper is described how hydrogel is exploited as sensor material for the \ud detection of carbon dioxide (CO2). A pH-sensitive hydrogel disc, which swells and deswells in response to pH changes, was clamped between a pressure sensor membrane and a porous metal screen together with a bicarbonate solution. Bicarbonate reacts with CO2 resulting in a pH change. The enclosed hydrogel will generate pressure as a response to the pH change. This pressure is a measure for the partial pressure of CO2. The main advantage of this sensor principle is the lack of a reference electrode as required for potentiometric sensors

A micro CO2 gas sensor based on sensing of pH-sensitive hydrogel swelling by means of a pressure sensor

In this paper a sensor is presented for the detection of carbon dioxide gas inside the stomach in order to diagnose gastrointestinal ischemia. The operational principle of the sensor is measuring the CO/sub 2/ induced pressure generation of a confined pH-sensitive hydrogel by means of a micro pressure sensor. The sensor is capable of measuring CO/sub 2/ with a response time between 2 and 4 minutes and a maximum pressure of 0.29/spl times/10/sup 5/ Pa at 20 kPa CO/sub 2/. The sensor is able to resist up to 1 M HCl acid as can be present inside the stomach. The results are very promising for real application and clinical trials are planned

Persuasive Technology for Learning and Teaching – The EuroPLOT Project

The concept of persuasive design has demonstrated its benefits by changing human behavior in certain situations, but in the area of education and learning, this approach has rarely been used. To change this and to study the feasibility of persuasive technology in teaching and learning, the EuroPLOT project (PLOT = Persuasive Learning Objects and Technologies) has been funded 2010-2013 by the Education, Audiovisual and Culture Executive Agency (EACEA) in the Life-long Learning (LLL) programme. In this program two tools have been developed (PLOTMaker and PLOTLearner) which allow to create learning objects with inherently persuasive concepts embedded. These tools and the learning objects have been evaluated in four case studies: language learning (Ancient Hebrew), museum learning (Kaj Munk Museum, Denmark), chemical handling, and academic Business Computing. These case studies cover a wide range of different learning styles and learning groups, and the results obtained through the evaluation of these case studies show the wide range of success of persuasive learning. They also indicate the limitations and areas where improvements are required

The Ursinus Weekly, April 21, 1941

Noted x-ray specialist to speak here Tuesday • Spohn announces Ruby business staff set-up • Variety is keynote of prom; minstrel show gets laughs • Annual open house to be held May 3 • Besse Howard to speak at forum on April 30 • Binder elected president of council; other offices filled in delayed vote • Sibbald chooses play committees • Leuallen to present paper at meeting of collegiate chemists • Cub and Key taps five • Last call for reservations for the Y New York trip! • Blum and Wismer reach finals at TKA conclave • Circus theme will provide novel setting for May hop • Men\u27s debating club elects Denton Herber president • Dr. Price presents paper • Eunice King gives talk on Christian community • French movie reviewed • Brotherhood of St. Paul elects Hauseman to head club • Baseball squad defeats Haverford 4-1 but bows to Pennacs 9-3; MacMahon fans 13 in Haverford tilt • Bear trackmen drop first meet to G-burg Saturday by 86-40 score • Women\u27s golf team loses opener to Swarthmore 5-0https://digitalcommons.ursinus.edu/weekly/1815/thumbnail.jp

Imaging an Adapted Dentoalveolar Complex

Adaptation of a rat dentoalveolar complex was illustrated using various imaging modalities. Micro-X-ray computed tomography for 3D modeling, combined with complementary techniques, including image processing, scanning electron microscopy, fluorochrome labeling, conventional histology (H&E, TRAP), and immunohistochemistry (RANKL, OPN) elucidated the dynamic nature of bone, the periodontal ligament-space, and cementum in the rat periodontium. Tomography and electron microscopy illustrated structural adaptation of calcified tissues at a higher resolution. Ongoing biomineralization was analyzed using fluorochrome labeling, and by evaluating attenuation profiles using virtual sections from 3D tomographies. Osteoclastic distribution as a function of anatomical location was illustrated by combining histology, immunohistochemistry, and tomography. While tomography and SEM provided past resorption-related events, future adaptive changes were deduced by identifying matrix biomolecules using immunohistochemistry. Thus, a dynamic picture of the dentoalveolar complex in rats was illustrated

The Ursinus Weekly, December 10, 1951

Feulner goes to convention in New York • Supply Store announces 40 percent reductions • Pi Gamma Mu sets initiation banquet for new members • Booster Committee doing art work • Messiah concert called credit to Philip\u27s directing ability • Harte and Lukens named \u2753 year book co-editors • Count to speak at 3rd Forum on January 9 • Y hears lecture on loyalty oath • Students dance at winter whirl • Inge Rudloff to speak • Pre-Christmas week of gay events arrives • Curtain Club may give play again • Candlelight Communion planned Thursday night • St. Nick furthers his education by paying visit to Ursinus College • Editorials: Christmas spirit; Thanks for paint job; New religion discovered • English dorm life described as much different from U.S. • I\u27m dreaming of a tight Christmas • Christmas spirits rise as caroling day draws near • Investment in dinner at Millers\u27 home pays high dividends • Bruin court squad scores 67-61 win over Lycoming team in extra period • Snell\u27s Belles practice for coming court season • Intramural basketball to start after Xmas vacation • Temple Pharmacy defeated by locals as 1951-52 basketball season begins • Twenty-seven report to Coach Kuhrt Wieneke for wrestling • Crusaders\u27 rally dies as Bears win thriller, 60-58 • French Club holds annual holiday soiree • Teacher to address FTA • Jones reads Galsworthy • Chest reaches half mark • Chess Club scores loss to Lansdale teamhttps://digitalcommons.ursinus.edu/weekly/1530/thumbnail.jp

Adapting SAM for CDF

The CDF and D0 experiments probe the high-energy frontier and as they do so have accumulated hundreds of Terabytes of data on the way to petabytes of data over the next two years. The experiments have made a commitment to use the developing Grid based on the SAM system to handle these data. The D0 SAM has been extended for use in CDF as common patterns of design emerged to meet the similar requirements of these experiments. The process by which the merger was achieved is explained with particular emphasis on lessons learned concerning the database design patterns plus realization of the use cases.Comment: Talk from the 2003 Computing in High Energy and Nuclear Physics (CHEP03), La Jolla, Ca, USA, March 2003, 4 pages, pdf format, TUAT00

Arctic smoke - aerosol characteristics during a record smoke event in the European Arctic and its radiative impact

In early May 2006 a record high air pollution event was observed at Ny-Ålesund, Spitsbergen. An atypical weather pattern established a pathway for the rapid transport of biomass burning aerosols from agricultural fires in Eastern Europe to the Arctic. Atmospheric stability was such that the smoke was constrained to low levels, within 2 km of the surface during the transport. A description of this smoke event in terms of transport and main aerosol characteristics can be found in Stohl et al. (2007). This study puts emphasis on the radiative effect of the smoke. The aerosol number size distribution was characterised by lognormal parameters as having an accumulation mode centered around 165–185 nm and almost 1.6 for geometric standard deviation of the mode. Nucleation and small Aitken mode particles were almost completely suppressed within the smoke plume measured at Ny-Ålesund. Chemical and microphysical aerosol information obtained at Mt. Zeppelin (474 m a.s.l) was used to derive input parameters for a one-dimensional radiation transfer model to explore the radiative effects of the smoke. The daily mean heating rate calculated on 2 May 2006 for the average size distribution and measured chemical composition reached 0.55 K day−1 at 0.5 km altitude for the assumed external mixture of the aerosols but showing much higher heating rates for an internal mixture (1.7 K day−1). In comparison a case study for March 2000 showed that the local climatic effects due to Arctic haze, using a regional climate model, HIRHAM, amounts to a maximum of 0.3 K day−1 of heating at 2 km altitude (Treffeisen et al., 2005)

The Ursinus Weekly, December 3, 1951

26 men join frats after rush week • Library used book sale begins today • Chem group lists water program • Light up the sky scores hit as first stage offering • Messiah features highly-rated soloists • Christmas plans made by WSGA; Lights needed • Private lives given as group production by new club members • English Club takes in new members • French Club plans party • Senior ball theme set for Friday • Y panel discusses army conscription • FTA to hear talk on teaching ways • Editorials: A pledge is a pledge; World discusses peace • Bob Herber describes room at University of Bristol, England • Senior prom themes remain centered about winter in past several years • Posters now made by freshmen girls for all activities • Supply Store improvements came with Navy moving to Ursinus campus during war years • Frank Merriwell saves the day • Jayvees defeat Penn; Have undefeated year • Graduating seniors vacate five positions on Ursinus soccer team • Swimming team loses one from last year\u27s squad • Eleven senior men bid farewell to college football playing careers • Albright defeats Curtis Hall team • Penn ties Belles in final contest • Miss Snell loses six hockey girls • Boyd to captain hockey squad in the 1952 season • Youth rally planned • Day students slate party • McClures to entertain • Concert listed • Students must return Ruby proofs by Fridayhttps://digitalcommons.ursinus.edu/weekly/1529/thumbnail.jp