The Ursinus Weekly, November 12, 1951

Second Forum features talk on philosophy • MSGA compiles roster of minimum penalties • Campus Chest combines all campaigns for money • Library records show big increase • Chem society lists speaker • Marriage discussion held at Y fireside chats • Students offered cheap rates for The River • Kenneth Graham read at meeting • Cast listed for group production • Large crowd hears pianist in local recital Thursday • Jones, Pettit write Ursinus spirit song • Newman Club plans events • Four new members join pre-legal group • Dr. Garrett pens article for language journal • Editorials: Dreamers wanted; Korean interest lags • Letters to the editor • YM-YW plan spoken grace • Adelphi tallies 39-19 win over Ursinus grid team • Junior Bearettes defeat Beaver • Forty men start basketball practice • Bruin eleven to meet undefeated Crusaders • Lehigh booters down Grizzlies; Beaver beats Snell\u27s hockeyites • Junior bazaar hailed success • Lois Johnson represents Red Cross at meeting • Polish refugee lectures in several classeshttps://digitalcommons.ursinus.edu/weekly/1527/thumbnail.jp

The Ursinus Weekly, May 5, 1952

Phila. Story to be presented May 8, 9 & 10 • Pre-meds elect officers • Y cabinet assumes duties at retreat • Music Club to hold elections tomorrow • Inter-sorority group holds annual party • Students will be charged for all overdue library books • Music Club to give concert • WSGA endorses removal of posters • New Lantern head selected by staff • Dan Giangiulio is elected new president of MSGA • Final plans set for May Day pageant, campus activities • Future teachers to hear talk Tuesday • Ludwig receives prize from chemical institute • Bus. Ad. club reorganizes; Bennett elected president • New Selective Service test scheduled to be given May 22 • Editorials: More pride needed; Super-patriots gag opinion • Spirit group meets to plan program for next year • Chess club loses match • Letters to the editor • German Club elects Owens • Junior-Sophomore weekend held • Pinned • Engagements • Many infected by senioritus • May pageants present queen in many guises • Parting seniors reveal one last desire • Hal Feist hurls seven-hit victory over Swarthmore • Girls net team gains shutout win • Delaware trounces Bears 10 to 3 with 15-hit attack • Cinder men rout Cadets, lose to Lehigh runners • Girls\u27 tennis team beats Stroudsburg 4-1 • Gellman elected to captain 1953 wrestling squad • Moravian beats Ursinus; Bears leave 15 on base • Stolen gloves halt intramural games • Y retreaters spend enjoyable weekendhttps://digitalcommons.ursinus.edu/weekly/1543/thumbnail.jp

Measuring category intuitiveness in unconstrained categorization tasks

What makes a category seem natural or intuitive? In this paper, an unsupervised categorization task was employed to examine observer agreement concerning the categorization of nine different stimulus sets. The stimulus sets were designed to capture different intuitions about classification structure. The main empirical index of category intuitiveness was the frequency of the preferred classification, for different stimulus sets. With 169 participants, and a within participants design, with some stimulus sets the most frequent classification was produced over 50 times and with others not more than two or three times. The main empirical finding was that cluster tightness was more important in determining category intuitiveness, than cluster separation. The results were considered in relation to the following models of unsupervised categorization: DIVA, the rational model, the simplicity model, SUSTAIN, an Unsupervised version of the Generalized Context Model (UGCM), and a simple geometric model based on similarity. DIVA, the geometric approach, SUSTAIN, and the UGCM provided good, though not perfect, fits. Overall, the present work highlights several theoretical and practical issues regarding unsupervised categorization and reveals weaknesses in some of the corresponding formal models

Accounting for Graded Performance within a Discrete Search Framework

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/98271/1/s15516709cog2004_2.pd

Thermal Runaway of Li-Ion Cells: How Internal Dynamics, Mass Ejection, and Heat Vary with Cell Geometry and Abuse Type

Thermal runaway of lithium-ion batteries can involve various types of failure mechanisms each with their own unique characteristics. Using fractional thermal runaway calorimetry and high-speed radiography, the response of three different geometries of cylindrical cell (18650, 21700, and D-cell) to different abuse mechanisms (thermal, internal short circuiting, and nail penetration) are quantified and statistically examined. Correlations between the geometry of cells and their thermal behavior are identified, such as increasing heat output per amp-hour (kJ Ah-1) of cells with increasing cell diameter during nail penetration. High-speed radiography reveals that the rate of thermal runaway propagation within cells is generally highest for nail penetration where there is a relative increase in rate of propagation with increasing diameter, compared to thermal or internal short-circuiting abuse. For a given cell model tested under the same conditions, a distribution of heat output is observed with a trend of increasing heat output with increased mass ejection. Finally, internal temperature measurements using thermocouples embedded in the penetrating nail are shown to be unreliable thus demonstrating the need for care when using thermocouples where the temperature is rapidly changing. All data used in this manuscript are open access through the NREL and NASA Battery Failure Databank

Heroin versus cocaine: opposite choice as a function of context but not of drug history in the rat

Rationale Previous studies have shown that rats trained to self-administer heroin and cocaine exhibit opposite preferences, as a function of setting, when tested in a choice paradigm. Rats tested at home prefer heroin to cocaine whereas rats tested outside the home prefer cocaine to heroin. Here we investigated whether drug history would influence subsequent drug preference in distinct settings. Based on a theoretical model of drug-setting interaction, we predicted that regardless of drug history rats would prefer heroin at home and cocaine outside the home. Methods Rats with double-lumen catheters were first trained to self-administer either heroin (25 μg/kg) or cocaine (400 μg/kg) for 12 consecutive sessions. Twenty-six rats were housed in the self-administration chambers (thus, they were tested at home) whereas 30 rats lived in distinct home cages and were transferred to self-administration chambers only for the self-administration session (thus, they were tested outside the home). The rats were then allowed to choose repeatedly between heroin and cocaine within the same session for 7 sessions. Results Regardless of the training drug, the rats tested outside the home preferred cocaine to heroin whereas the rats tested at home preferred heroin to cocaine. There was no correlation between drug preference and drug intake during the training phase. Conclusion Drug preferences were powerfully influenced by the setting but, quite surprisingly, not by drug history. This suggests that, under certain conditions, associative learning processes and drug-induced neuroplastic adaptations play a minor role in shaping individual preferences for one drug or the other

First low-frequency Einstein@Home all-sky search for continuous gravitational waves in Advanced LIGO data

We report results of a deep all-sky search for periodic gravitational waves from isolated neutron stars in data from the first Advanced LIGO observing run. This search investigates the low frequency range of Advanced LIGO data, between 20 and 100 Hz, much of which was not explored in initial LIGO. The search was made possible by the computing power provided by the volunteers of the Einstein@Home project. We find no significant signal candidate and set the most stringent upper limits to date on the amplitude of gravitational wave signals from the target population, corresponding to a sensitivity depth of 48.7 [1/root Hz]. At the frequency of best strain sensitivity, near 100 Hz, we set 90% confidence upper limits of 1.8 x 10(-25). At the low end of our frequency range, 20 Hz, we achieve upper limits of 3.9 x 10(-24). At 55 Hz we can exclude sources with ellipticities greater than 10(-5) within 100 pc of Earth with fiducial value of the principal moment of inertia of 10(38) kg m(2)

Design of a Low Power and Area Efficient Digital Down Converter and SINC Filter in CMOS 90-nm Technology

A digital down converter (DDC) typically receives a digital input that has been generated by an analog to digital converter (ADC) operating at intermediate frequency (IF) in an RF receiver chain. The function of the DDC is to down convert the IF signal to baseband in phase (I) and quadrature (Q) signals and is a very important component in wireless receivers. A Digital Down Converter (DDC) is developed based on square wave local oscillators facilitating a multiplier-less implementation with no constraints on the sampling frequency. The DDC includes a pseudo multi-rate SINC low pass filter which exhibits better performance compared to the standard multi-stage SINC filter. The pseudo multi-rate SINC filter can be implemented with a unique cascaded integrator comb (CIC) filter to obtain the same improved performance. A 90nm CMOS design takes 8 bit inputs centered at 25 MHz with a bandwidth of 30 MHz and is clocked at 400MHz. The design demonstrates a flexible, very low power/size DDC architecture for single chip digital receiver applications. The layout area is 333.485um x 617.6um and the power consumption is 12.54mW when clocked at 400MHz