The biology and fishery of Atlantic sailfish Istiophorus platypterus from southeast Florida

(Document has 31 pages.

Determination of gas volume trapped in a closed fluid system

Technique involves extracting known volume of fluid and measuring system before and after extraction, volume of entrapped gas is then computed. Formula derived from ideal gas laws is basis of this method. Technique is applicable to thermodynamic cycles and hydraulic systems

Lightweight reflector assembly

An inexpensive, lightweight reflective assembly member having good optical quality and particularly adaptable to accommodating temperature variations without providing destructive thermal stresses and reflective slope errors is described. The reflective assembly consists of a thin sheet of glass with appropriate reflective coating and a cellular glass block substrate bonded together. The method of fabrication includes abrading the cellular substrate with an abrasive master die to form an appropriate concave surface. An adhesive is applied to the abraded surface and a lamina reflective surface is placed under a uniform pressure to conform the reflective surface onto the desired abraded surface of the substrate

Rifting and Mafic Magmatism in the Hebridean Basins

Acknowledgements and Funding Research in the BPIP was supported by NERC grant GR9/1581, and the Carnegie Trust for the Universities of Scotland. H. Rollinson and E. Gazel are thanked for helpful and constructive criticisms, particularly of the modelling aspects of the paper, and T. Rooney is thanked for invaluable scientific and editorial assistance.Peer reviewedPostprin

An Evaluation of the Privacy Policies of Library Vendors

This project aims to evaluate the degree to which various library vendors are taking the privacy of library users into account. In 2018, the Library Freedom Project put together a Vendor Privacy Scorecard analyzing the privacy policies of twelve major vendors, but no follow-up study seems to have been conducted by the Project since then. I intend to conduct my own updated privacy policy audit of these and other significant library vendors (particularly those used by NC LIVE) to gain a better understanding of how well these vendors are accounting for and protecting the privacy of individual library users today. This largely involves an analysis (based on the criteria used by the Library Freedom Project and the guidelines found in the ALA Library Privacy Checklist for Vendors) of vendors’ posted privacy policies. In my presentation, I will discuss the results of my analysis

Sorting by LC Call Number in Excel

Sorting by Library of Congress (LC) call number in Excel is problematic because Excel does not treat LC call numbers as numbers. In practice, this means that Excel sorts LC call numbers based on each successive digit in the call number rather than the overall value of each call number. (for example, a call number beginning with PS507 would be sorted after one beginning with PS4998 in a default Excel sort). In this presentation, I demonstrate one method for accurately sorting by LC call number in Excel

If You Only Knew the Power of the Dark Web! Finding Intellectual Freedom, Privacy, and Anonymity Online

While the dark web attracts largely negative and sensationalistic headlines as a haven for criminality, it (and the tools used to access it) also offers knowledgeable users the ability to surf the web free of government surveillance and social media/marketing tracking and to exercise free speech in an environment of virtual anonymity. As such, the dark web supports librarians’ values regarding privacy and intellectual freedom. This presentation will give librarians a realistic look at both the positive and negative aspects of the dark web, provide them with examples of the types of users who may want to explore or make use of the dark web, and introduce them to dark web tools that can be used to surf even the surface web anonymously

Scientific drilling of the Boltysh impact crater, Ukraine

Introduction: The Boltysh crater has been known for several decades and was first drilled in the 1960s as part of a study of economic oil shale deposits. Unfortunately, the cores were not curated and have been lost. We have re-drilled the impact crater and have recovered a near continuous record of ~400 m of organicrich sediments together with 15 m of suevite

Lake sedimentological and ecological response to hyperthermals : Boltysh impact crater, Ukraine

Acknowledgements Initial drilling of the Boltysh meteorite crater was funded by Natural Environment Research Council (NERC) grant NE/D005043/1. The authors are extremely grateful to the valuable scientific contributions of S. Kelley and I. Gilmour. The constructive and critical reviews by M. Schuster and an anonymous reviewer greatly helped to improve this manuscript.Peer reviewedPostprin

Organic geochemistry of the Boltysh impact crater, Ukraine

The Boltysh crater has been know for several decades and was originally drilled in the 1960s - 1980s in a study of economic oil shale deposits. Unfortunately, the cores were not curated and have been lost. However we have recently re-drilled the impact crater and have recovered a near continuous record of ~400m of organic rich sediments deposited in a deep isolated lake which overly the basement rocks spanning a period ~10 Ma. The Boltysh impact crater, centred at 48°54–N and 32°15–E is a complex impact structure formed on the basement rocks of the Ukrainian shield. The age of the impact is 65.17±0.64 Ma [1]. At 24km diameter, the impact is unlikely to have contributed substantially to the worldwide devastation at the end of the Cretaceous. However, the precise age of the Boltysh impact relative to the Chicxulub impact and its location on a stable low lying coastal plain which allowed formation of the postimpact crater lake make it a particularly important locality. After the impact, the crater quickly filled with water, and the crater lake received sediment input from the surrounding land surface for a period >10 Ma [2]. These strata contain a valuable record of Paleogene environmental change in central Europe, and one of very few terrestrial records of the KT event. This preeminent record of the Paleogene of central Europe can help us to answer several related scientific questions. What is the relative age of Boltysh compared with Chicxulub? How long was the hydrothermal system active for after the impact event? How did the devastated area surrounding the crater recover, and how rapid was the recovery? The first sediments to be deposited in the crater lake were a series of relatively thin turbidites, the sediments then become organic rich shales and oil shales. Within the core there is ~400 m of organic rich shales/oil shales spanning a period of ~10 Ma some of which contain macrofossils such as ostracods, fish and plant fossils. Preliminary palynological studies suggest initial sedimentation was slow after the impact followed by more rapid sedimentation through the Late Paleocene. Hydrocarbons extracted from these samples are commonly dominated by terrestrial n-alkanes (Fig 1), Hopanes (including 3-methylhopanes) and steranes are also abundant and indicate the immaturity of the samples. The immaturity of samples is also evident from the abundance of hopenes, sterenes and oleanenes especially in the upper section of the core. In some of the oil shales the hopenes and sterenes are the most abundant hydrocarbons present. There is variation in the distribution of hydrocarbons/biomarkers and palynology throughout the core caused by changing inputs and environmental conditions