From Silence to Golden: The Slow Integration of Instruments into Christian Worship

The Christian church’s stance on the use of instruments in sacred music shifted through influences of church leaders, composers, and secular culture. Synthesizing the writings of early church leaders and church historians reveals a clear progression. The early musical practices of the church were connected to the Jewish synagogues. As recorded in the Old Testament, Jewish worship included instruments as assigned by one’s priestly tribe. Eventually, early church leaders rejected that inclusion and developed a rather robust argument against instruments in liturgical worship. The totalitarian stance on musical instruments in sacred worship began to loosen as the organ increased in use and popularity. Organs began to find a more regular place in churches by the twelfth century. While organ music set a precedent which will later allow for the entry of other instruments into the sanctuary, it took quite a while to do so. As the Protestant Reformation changed the face of the church, Martin Luther served a crucial role, not just as a theological leader, but also as the center of a new musical movement in the church. This Reformation began a series of reactions that eventually leads to the church’s general acceptance of instruments in sacred worship

The Helvetica Story

A humorous short story on the rise and fall of the typeface Helvetica and its many imitators

Morphogenesis along the animal-vegetal axis: fates of primary quartet micromere daughters in the gastropod Crepidula fornicata.

BackgroundThe Spiralia are a large, morphologically diverse group of protostomes (e.g. molluscs, annelids, nemerteans) that share a homologous mode of early development called spiral cleavage. One of the most highly-conserved features of spiralian development is the contribution of the primary quartet cells, 1a-1d, to the anterior region of the embryo (including the brain, eyes, and the anterior ciliary band, called the prototroch). Yet, very few studies have analyzed the ultimate fates of primary quartet sub-lineages, or examined the morphogenetic events that take place in the anterior region of the embryo.ResultsThis study focuses on the caenogastropod slipper snail, Crepidula fornicata, a model for molluscan developmental biology. Through direct lineage tracing of primary quartet daughter cells, and examination of these cells during gastrulation and organogenesis stages, we uncovered behaviors never described before in a spiralian. For the first time, we show that the 1a2-1d2 cells do not contribute to the prototroch (as they do in other species) and are ultimately lost before hatching. During gastrulation and anterior-posterior axial elongation stages, these cells cleavage-arrest and spread dramatically, contributing to a thin provisional epidermis on the dorsal side of the embryo. This spreading is coupled with the displacement of the animal pole, and other pretrochal cells, closer to the ventrally-positioned mouth, and the vegetal pole.ConclusionsThis is the first study to document the behavior and fate of primary quartet sub-lineages among molluscs. We speculate that the function of 1a2-1d2 cells (in addition to two cells derived from 1d12, and the 2b lineage) is to serve as a provisional epithelium that allows for anterior displacement of the other progeny of the primary quartet towards the anterior-ventral side of the embryo. These data support a new and novel mechanism for axial bending, distinct from canonical models in which axial bending is suggested to be driven primarily by differential proliferation of posterior dorsal cells. These data suggest also that examining sub-lineages in other spiralians will reveal greater variation than previously assumed

Extracting information from the signature of a financial data stream

Market events such as order placement and order cancellation are examples of the complex and substantial flow of data that surrounds a modern financial engineer. New mathematical techniques, developed to describe the interactions of complex oscillatory systems (known as the theory of rough paths) provides new tools for analysing and describing these data streams and extracting the vital information. In this paper we illustrate how a very small number of coefficients obtained from the signature of financial data can be sufficient to classify this data for subtle underlying features and make useful predictions. This paper presents financial examples in which we learn from data and then proceed to classify fresh streams. The classification is based on features of streams that are specified through the coordinates of the signature of the path. At a mathematical level the signature is a faithful transform of a multidimensional time series. (Ben Hambly and Terry Lyons \cite{uniqueSig}), Hao Ni and Terry Lyons \cite{NiLyons} introduced the possibility of its use to understand financial data and pointed to the potential this approach has for machine learning and prediction. We evaluate and refine these theoretical suggestions against practical examples of interest and present a few motivating experiments which demonstrate information the signature can easily capture in a non-parametric way avoiding traditional statistical modelling of the data. In the first experiment we identify atypical market behaviour across standard 30-minute time buckets sampled from the WTI crude oil future market (NYMEX). The second and third experiments aim to characterise the market "impact" of and distinguish between parent orders generated by two different trade execution algorithms on the FTSE 100 Index futures market listed on NYSE Liffe

From Silence to Golden: The Slow Integration of Instruments into Christian Worship

The Christian church’s stance on the use of instruments in sacred music shifted through influences of church leaders, composers, and secular culture. Synthesizing the writings of early church leaders and church historians reveals a clear progression. The early musical practices of the church were connected to the Jewish synagogues. As recorded in the Old Testament, Jewish worship included instruments as assigned by one’s priestly tribe. Eventually, early church leaders rejected that inclusion and developed a rather robust argument against instruments in liturgical worship. The totalitarian stance on musical instruments in sacred worship began to loosen as the organ increased in use and popularity. Organs began to find a more regular place in churches by the twelfth century. While organ music set a precedent which will later allow for the entry of other instruments into the sanctuary, it took quite a while to do so. As the Protestant Reformation changed the face of the church, Martin Luther served a crucial role, not just as a theological leader, but also as the center of a new musical movement in the church. This Reformation began a series of reactions that eventually leads to the church’s general acceptance of instruments in sacred worship

Spiritual Development Among Christian Athletes at a Large Christian University

Undergraduate Applie

Chromatic Thresholds of Regular Graphs with Small Cliques

The chromatic threshold of a class of graphs is the value θ such that any graph in this class with a minimum degree greater than θn has a bounded chromatic number. Several important results related to the chromatic threshold of triangle-free graphs have been reached in the last 13 years, culminating in a result by Brandt and Thomassé stating that any triangle-free graph on n vertices with minimum degree exceeding 1/3 n has chromatic number at most 4. In this paper, the researcher examines the class of triangle-free graphs that are additionally regular. The researcher finds that any triangle-free graph on n vertices that is regular of degree (1/4+a)n with a \u3e 0 has chromatic number bounded by f (a), a function of a independent of the order of the graph n. After obtaining this result, the researcher generalizes this method to graphs that are free of larger cliques in order to limit the possible values of the chromatic threshold for regular Kr-free graphs