The City by the Pool

This volume offers a new and up-to-date synthesis of Lincoln's long history as a major city and regional capital, from prehistory to 1945. The 'City by the Pool' was a major religious centre long before the Roman invasion and from bronze-age shamans to early Baptists people have always been attracted here for spiritual as well as mundane purposes. The authors argue for the presence of a major ritual causeway of the late Bronze and Iron Age and outline the extent to which ritual monuments also contributed to the character of Roman Lincoln. This book is based on more than a hundred publicly-funded excavations and building surveys undertaken between 1945 and 2000. It surveys all aspects of city life, from housing and fortifications to the water supply and rubbish disposal. It includes a CD Rom with a Geographic Information System (GIS) and a relational data-base known as LARA (the Lincoln Archaeological Research Assessment)

Gaia science alerts and the observing facilities of the Serbian-Bulgarian mini-network telescopes

The astrometric European Space Agency (ESA) Gaia mission was launched in December 19, 2013. One of the tasks of the Gaia mission is production of an astrometric catalog of over one billion stars and more than 500000 extragalactic sources. The quasars (QSOs), as extragalactic sources and radio emitters, are active galactic nuclei objects (AGNs) whose coordinates are well determined via Very Long Baseline Interferometry (VLBI) technique and may reach sub-milliarcsecond accuracy. The QSOs are the defining sources of the quasi-inertial International Celestial Reference Frame (ICRF) because of their core radio morphology, negligible proper motions (until sub-milliarcsecond per year), and apparent point-like nature. Compact AGNs, visible in optical domain, are useful for a direct link of the future Gaia optical reference frame with the most accurate radio one. Apart from the above mentioned activities, Gaia has other goals such as follow-up of transient objects. One of the most important Gaia's requirements for photometric alerts is a fast observation and reduction response, that is, submition of observations within 24 hours. For this reason we have developed a pipeline. In line with possibilities of our new telescope (D(cm)/F(cm)=60/600) at the Astronomical Station Vidojevica (ASV, of the Astronomical Observatory in Belgrade), we joined the Gaia-Follow-Up Network for Transients Objects (Gaia-FUN-TO) for the photometric alerts. Moreover, in view of the cooperation with Bulgarian colleagues (in the frst place, SV), one of us (GD) initiated a local mini-network of Serbian { Bulgarian telescopes useful for the Gaia-FUN-TO and other astronomical purposes. During the next year we expect a new 1.4 m telescope at ASV site. The speed of data processing (from observation to calibration server) could be one day. Here, we present an overview of our activities in the Gaia-FUN-TO which includes establishing Serbian { Bulgarian mini-network (of five telescopes at three sites, ASV in Serbia, Belogradchik and Rozhen in Bulgaria), the Gaia-FUN-TO test observations, and some results. [Projekat Ministarstva nauke Republike Srbije, br. 176011: Dynamics and kinematics of celestial bodies and systems, br. 176004: Stellar physics, i br. 176021: Visible and invisible matter in nearby galaxies: theory and observations

The City by the Pool

This volume offers a new and up-to-date synthesis of Lincoln's long history as a major city and regional capital, from prehistory to 1945. The 'City by the Pool' was a major religious centre long before the Roman invasion and from bronze-age shamans to early Baptists people have always been attracted here for spiritual as well as mundane purposes. The authors argue for the presence of a major ritual causeway of the late Bronze and Iron Age and outline the extent to which ritual monuments also contributed to the character of Roman Lincoln. This book is based on more than a hundred publicly-funded excavations and building surveys undertaken between 1945 and 2000. It surveys all aspects of city life, from housing and fortifications to the water supply and rubbish disposal. It includes a CD Rom with a Geographic Information System (GIS) and a relational data-base known as LARA (the Lincoln Archaeological Research Assessment)

A Corpus of Anglo-Saxon and Medieval Pottery from Lincoln

This volume reports on the Anglo-Saxon and Medieval pottery found during various archaeological excavations in the city from 1970 until 1987. The authors present a city-wide pottery classification system and analyse the sequence of pottery types through time and at numerous sites. They make extensive use of petrological analysis, including the study of over 600 thin-sections. These have been used to characterise the local clay and temper sources exploited by Lincoln potters and to identify wares made in the vicinity of the city, those made elsewhere in the county of Lincolnshire, and to identify regional and foreign imports. The volume is arranged by pottery types, illustrated by typical and unusual examples and accompanied by descriptions of their visual appearance, petrological characteristics, source, forms, decoration and dating evidence

Intrinsically Disordered C-Terminal Tails of \u3cem\u3eE. coli\u3c/em\u3e Single-Stranded DNA Binding Protein Regulate Cooperative Binding to Single-Stranded DNA

The homotetrameric Escherichia coli single-stranded DNA binding protein (SSB) plays a central role in DNA replication, repair and recombination. E. coli SSB can bind to long single-stranded DNA (ssDNA) in multiple binding modes using all four subunits [(SSB)65 mode] or only two subunits [(SSB)35 binding mode], with the binding mode preference regulated by salt concentration and SSB binding density. These binding modes display very different ssDNA binding properties with the (SSB)35 mode displaying highly cooperative binding to ssDNA. SSB tetramers also bind an array of partner proteins, recruiting them to their sites of action. This is achieved through interactions with the last 9 amino acids (acidic tip) of the intrinsically disordered linkers (IDLs) within the four C-terminal tails connected to the ssDNA binding domains. Here, we show that the amino acid composition and length of the IDL affects the ssDNA binding mode preferences of SSB protein. Surprisingly, the number of IDLs and the lengths of individual IDLs together with the acidic tip contribute to highly cooperative binding in the (SSB)35 binding mode. Hydrodynamic studies and atomistic simulations suggest that the E. coli SSB IDLs show a preference for forming an ensemble of globular conformations, whereas the IDL from Plasmodium falciparum SSB forms an ensemble of more extended random coils. The more globular conformations correlate with cooperative binding

A Corpus of Anglo-Saxon and Medieval Pottery from Lincoln

This volume reports on the Anglo-Saxon and Medieval pottery found during various archaeological excavations in the city from 1970 until 1987. The authors present a city-wide pottery classification system and analyse the sequence of pottery types through time and at numerous sites. They make extensive use of petrological analysis, including the study of over 600 thin-sections. These have been used to characterise the local clay and temper sources exploited by Lincoln potters and to identify wares made in the vicinity of the city, those made elsewhere in the county of Lincolnshire, and to identify regional and foreign imports. The volume is arranged by pottery types, illustrated by typical and unusual examples and accompanied by descriptions of their visual appearance, petrological characteristics, source, forms, decoration and dating evidence

Multi-band optical variability of three TeV Blazars on Diverse Timescales

We present our optical photometric observations of three TeV blazars, PKS 1510-089, PG 1553+113 and Mrk 501 taken using two telescopes in India, one in Bulgaria, one in Greece and one in Serbia during 2012 - 2014. These observations covered a total of 95 nights with a total of 202 B filter frames, 247 images in V band, 817 in R band while 229 images were taken in the I filter. This work is focused on multi-band flux and colour variability studies of these blazars on diverse timescales which are useful in understanding the emission mechanisms. We studied the variability characteristics of above three blazars and found all to be active over our entire observational campaigns. We also searched for any correlation between the brightness of the sources and their colour indices. During the times of variability, no significant evidence for the sources to display spectral changes correlated with magnitude was found on timescales of a few months. We briefly discuss the possible physical mechanisms most likely responsible for the observed flux variability.Comment: 11 pages, 7 figures, 9 tables. Accepted for publication in MNRA