Project 400: The Plymouth Colony Archaeological Survey, Report on the 2014 Field Season, Burial Hill Plymouth, Massachusetts

In May and June of 2014, a field school from the University of Massachusetts Boston, in partnership with Plimoth Plantation, undertook a second season of work in Plymouth, Massachusetts, as part of Project 400: The Plymouth Colony Archaeological Survey, a site survey and excavation program leading up to the 400th anniversary of New England’s first permanent English settlement in 1620, the founding of Plymouth Colony. This work was conducted under permit #3384 from the State Archaeologist’s office at the Massachusetts Historical Commission. The 2014 work focused on the eastern edge of Burial Hill along School Street in downtown Plymouth and consisted of ground penetrating radar survey and excavation (3 STPs and 9 EUs). Burial Hill, formerly Fort Hill, is understood as the location of the original fort built by the English colonists, and the walls that enclosed the fort and town stretched down the hill towards the harbor. The precise locations of any of these features have never been archaeologically identified. In the 18th and 19th centuries, the land on the eastern edge of the hill along School Street was sold to individuals who built houses and stables, all demolished by the early 20th century. Our test excavations were designed to see if any 17th-century features or deposits existed either under the floors of these buildings or in the strip of land between the backs of the buildings and the burials, which begin roughly 20 meters from the street. During the 2014 season, we did not locate any 17th-century features or deposits. The 2014 excavation units tested the footprints of 4 different 19th-century building lots (an 1827 school and three barn or stable buildings), all of which were demolished between 1882 and 1901. With the exception of the school, the buildings completely filled the 30 foot deep lots that existed along School Street. The excavations revealed that the buildings had been cut into the hill, destroying any earlier deposits that might have existed in those areas. Because of their particular construction and the area topography, there was almost no trash deposition behind the buildings, up the slope of Burial Hill. As each building was taken down, its footprint was filled, first to create a level surface, then to create a regular slope for this edge of Burial Hill. Each building appears to have been filled individually, since the deposits within each building footprint were quite different from each other. Material to fill these substantial building footprints must have been brought in from elsewhere; the slag in EU3 is the clearest evidence of this. Although we found flaked tools (a quartz flake drill, a rhyolite unifacial scraper, and quartz Small Stemmed points) in the topsoil and fill layers of EUs 8 and 9 and chipping debris (quartz and rhyolite) in all excavation units, we found no in-situ Native artifacts or features. With the exception of the large metal pieces in EU2 and some related deposits in EU9 which seem to be primary trash deposits, most other deposits contained either predominantly architectural materials (brick, nails, window glass), or a mixture of architectural materials and redeposited sheet refuse (ceramics and glass in small fragments). One of the only in situ, non-fill deposits that we encountered was the test pit that we dug below the building floor layer of EU2 which uncovered an associated late 18th or early 19th century pipe bowl and a dog skeleton, either a burial or an animal that died below the floor. From other units, there were a number of interesting small finds such as buttons, pins, an 1874 Indian Head penny, and buckles, including an early 20th-century Red Cross pin. Other notable artifacts include fragments of six possible gravestones in both slate and marble. One of these is decorated and appears to be a fragment of a slate Medusa style design from the Soule family of carvers, probably from the 1750s or 1760s. An analysis of all of the bone and tooth fragments recovered during the field season confirmed that the whole collection consisted of the remains of common animals (cat, dog, rat, duck, chicken, sheep/goat, pig, and cow) and included no human remains. EU7, located in the lot that held the 1827 school, yielded a significant collection of small finds related to the school including pen nibs, slate pencils, and a possible compass fragment. The report illustrates these materials and presents comparative research on the archaeology of school sites and artifacts

Search for light massive gauge bosons as an explanation of the (g−2)μ(g-2)_\mu anomaly at MAMI

A massive, but light abelian U(1) gauge boson is a well motivated possible signature of physics beyond the Standard Model of particle physics. In this paper, the search for the signal of such a U(1) gauge boson in electron-positron pair-production at the spectrometer setup of the A1 Collaboration at the Mainz Microtron (MAMI) is described. Exclusion limits in the mass range of 40 MeV up to 300 MeV with a sensitivity in the mixing parameter of down to $\epsilon^2 = 8\times 10^{-7}$ are presented. A large fraction of the parameter space has been excluded where the discrepancy of the measured anomalous magnetic moment of the muon with theory might be explained by an additional U(1) gauge boson.Comment: 4 pages, 3 figure

Search for lepton-flavour-violating decays of Higgs-like bosons.

A search is presented for a Higgs-like boson with mass in the range 45 to 195 GeV/c2 decaying into a muon and a tau lepton. The dataset consists of proton-proton interactions at a centre-of-mass energy of 8 TeV , collected by the LHCb experiment, corresponding to an integrated luminosity of 2 fb-1 . The tau leptons are reconstructed in both leptonic and hadronic decay channels. An upper limit on the production cross-section multiplied by the branching fraction at 95% confidence level is set and ranges from 22 pb for a boson mass of 45 GeV/c2 to 4 pb for a mass of 195 GeV/c2

Internet fragmentation, political structuring, and organizational concentration in transnational engineering networks

Is the internet at risk of fragmentation? Whereas the literature has examined this question with a focus on domestic policies, communication standards, and internet governance institutions, we analyze fragmentation and alternative outcomes in transnational engineering networks. These networks constitute the social foundations of the unified or ‘global’internet. Our contributions include (1) broadening the debate beyond fragmentation-related network outcomes to include political structuring and organizational concentration, and (2) new evidence from an important engineering network around the Internet Engineering Task Force comprising thousands of participants and over four decades. Our analyses reveal fast and continuous network growth as well as clear signs of growing concentration of the network around a few major companies. A key implication is that, at the level of engineering networks, concerns about internet fragmentation might be unfounded and might distract from more salient developments such as organizational concentration

Speech intelligibility for target and masker with different spectra

The speech intelligibility index (SII) calculation is based on the assumption that the effective range of signal-to-noise ratio (SNR) regarding speech intelligibility is [− 15 dB; +15 dB]. In a specific frequency band, speech intelligibility would remain constant by varying the SNRs above + 15 dB or below − 15 dB. These assumptions were tested in four experiments measuring speech reception thresholds (SRTs) with a speech target and speech-spectrum noise, while attenuating target or noise above or below 1400 Hz, with different levels of attenuation in order to test different SNRs in the two bands. SRT varied linearly with attenuation at low-attenuation levels and an asymptote was reached for high-attenuation levels. However, this asymptote was reached (intelligibility was not influenced by further attenuation) for different attenuation levels across experiments. The − 15-dB SII limit was confirmed for high-pass filtered targets, whereas for low-pass filtered targets, intelligibility was further impaired by decreasing the SNR below − 15 dB (until − 37 dB) in the high-frequency band. For high-pass and low-pass filtered noises, speech intelligibility kept improving when increasing the SNR in the rejected band beyond + 15 dB (up to 43 dB). Before reaching the asymptote, a 10-dB increase of SNR obtained by filtering the noise resulted in a larger decrease of SRT than a corresponding 10-dB decrease of SNR obtained by filtering the target (the slopes SRT/attenuation were different depending on which source was filtered). These results question the use of the SNR range and the importance function adopted by the SII when considering sharply filtered signals

Observation of an Excited Bc+ State

Using pp collision data corresponding to an integrated luminosity of 8.5 fb-1 recorded by the LHCb experiment at center-of-mass energies of s=7, 8, and 13 TeV, the observation of an excited Bc+ state in the Bc+π+π- invariant-mass spectrum is reported. The observed peak has a mass of 6841.2±0.6(stat)±0.1(syst)±0.8(Bc+) MeV/c2, where the last uncertainty is due to the limited knowledge of the Bc+ mass. It is consistent with expectations of the Bc∗(2S31)+ state reconstructed without the low-energy photon from the Bc∗(1S31)+→Bc+γ decay following Bc∗(2S31)+→Bc∗(1S31)+π+π-. A second state is seen with a global (local) statistical significance of 2.2σ (3.2σ) and a mass of 6872.1±1.3(stat)±0.1(syst)±0.8(Bc+) MeV/c2, and is consistent with the Bc(2S10)+ state. These mass measurements are the most precise to date

Bose-Einstein correlations of same-sign charged pions in the forward region in pp collisions at √s=7 TeV

Bose-Einstein correlations of same-sign charged pions, produced in protonproton collisions at a 7 TeV centre-of-mass energy, are studied using a data sample collected by the LHCb experiment. The signature for Bose-Einstein correlations is observed in the form of an enhancement of pairs of like-sign charged pions with small four-momentum difference squared. The charged-particle multiplicity dependence of the Bose-Einstein correlation parameters describing the correlation strength and the size of the emitting source is investigated, determining both the correlation radius and the chaoticity parameter. The measured correlation radius is found to increase as a function of increasing charged-particle multiplicity, while the chaoticity parameter is seen to decreas