Codex Sinaiticus as a Window into Early Christian Worship

Codex Sinaiticus is the oldest and most complete New Testament in Greek known to exist. Its two colophons at the end of 2 Esdras and Esther indicate a possible connection with Pamphilus’ famous library at Caesarea in Palestine. Origen was head of a school for catechumens during his days in Alexandria in Egypt and later began a similar school in Caesarea. Pamphilus was Origen’s star pupil and later directed his school in Caesarea. These colophons may connect Sinaiticus with an ancient tradition of early Christian worship and instruction of new converts, possibly exhibited in particular scribal features. These scribal features are primarily located at “two-ways” lists of “virtue and vice” in the New Testament, which were popular methods of instructing the essentials of the faith and are found throughout early Christian literature. These areas in the New Testament (and in the epistle of Barnabas) were emphasized through paragraph ‘lists’ by the scribes of Sinaiticus. These ‘lists’ were most likely recited by the ancient reader in a distinctive way for the audience. It is possible that the audience interacted with the reader as the text was recited. This paper surveys the ancient practice of the public reading of scripture during Christian gatherings and the use of punctuation and lectional marking in manuscripts to aid readers in their task. A possible connection with earlier manuscripts is explored by a cursory examination of a similarity in formatting between Sinaiticus and P46, a second century copy of Paul’s epistles. When taken collectively, though sparse and fragmentary, the evidence suggests that Sinaiticus preserves an ancient practice of Christian instruction located in the unique paragraph ‘lists’ of the “two-ways” theme

Borrowing from Yourself: The Determinants of 401(k) Loan Patterns

This paper explores the determinants of people’s decisions to take 401(k) loans. We argue that 401(k) plans do not simply represent retirement saving, but they also provide a means of saving for precautionary purposes. We model factors that rationally would induce people to borrow from their pension plans, and we explain why people do not often use 401(k) loans to replace their more expensive credit card debt. Next we test our hypotheses using a rich dataset and show that people who are liquidity-constrained are more likely to have plan loans, while the better-off take larger loans when they do borrow. Plan characteristics such as the number of loans allowed also influence borrowing and loan size in interesting ways, while loan interest rates have only a small impact.

Energy conservation in the one-phase supercooled Stefan problem

© . This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/A one-phase reduction of the one-dimensional two-phase supercooled Stefan problem is developed. The standard reduction, employed by countless authors, does not conserve energy and a recent energy conserving form is valid in the limit of small ratio of solid to liquid conductivity. The present model assumes this ratio to be large and conserves energy for physically realistic parameter values. Results for three one-phase formulations are compared to the two-phase model for parameter values appropriate to supercooled salol (similar values apply to copper and gold) and water. The present model shows excellent agreement with the full two-phase model.Peer ReviewedPostprint (author's final draft

The Return of the State

Also CSST Working Paper #74.http://deepblue.lib.umich.edu/bitstream/2027.42/51236/1/470.pd

A Bayesian Approach to the Characterization of Electroencephalographic Recordings in Premature Infants

Preterm infants are particularly susceptible to cerebral injury, and electroencephalographic: EEG) recordings provide an important diagnostic tool for determining cerebral health. However, interpreting these EEG recordings is challenging and requires the skills of a trained electroencephalographer. Because these EEG specialists are rare, an automated interpretation of newborn EEG recordings would increase access to an important diagnostic tool for physicians. To automate this procedure, we employ a novel Bayesian approach to compute the probability of EEG features: waveforms) including suppression, delta brushes, and delta waves. The power of this approach lies not only in its ability to closely mimic the techniques used by EEG specialists, but also its ability to be generalized to identify other waveforms that may be of interest for future work. The results of these calculations are used in a program designed to output simple statistics related to the presence or absence of such features. Direct comparison of the software with expert human readers has indicated satisfactory performance, and the algorithm has shown promise in its ability to distinguish between infants with normal neurodevelopmental outcome and those with poor neurodevelopmental outcome

The aerodynamic response of airborne discs

A study has been conducted to characterize the flow over a free-flying disc. In this study, three types of discs are analyzed in a series of stationary experiments, and a single disc is analyzed in a spinning experiment. Two dimensionless parameters dominate the experiments, the Reynolds number and the tip speed ratio. The first experiment measured the lift and drag at varying angles of attack on a stationary disc. The second stationary experiment was a unique measurement of the center of lift of a disc as a function of velocity. The third stationary experiment was a tuft test to describe the boundary layer, done at different velocities and angles of attack. The spinning disc experiment utilized smoke to visualize the flow around the disc and ascertain the effects of spin on vorticity and boundary layer separation. Results showed that the center of lift was behind the geometric center at low velocity and moved rapidly forward with increasing velocity. Tuft and smoke tests showed that the boundary layer was attached across the entire surface with strong vortices shed from the sides and from the rear of the disc. The flow was primarily affected by the disc\u27s leading edge with secondary effects from the domed contour