Positional accommodative intraocular lens power error induced by the estimation of the corneal power and the effective lens position

Purpose: To evaluate the predictability of the refractive correction achieved with a positional accommodating intraocular lenses (IOL) and to develop a potential optimization of it by minimizing the error associated with the keratometric estimation of the corneal power and by developing a predictive formula for the effective lens position (ELP). Materials and Methods: Clinical data from 25 eyes of 14 patients (age range, 52–77 years) and undergoing cataract surgery with implantation of the accommodating IOL Crystalens HD (Bausch and Lomb) were retrospectively reviewed. In all cases, the calculation of an adjusted IOL power (PIOLadj) based on Gaussian optics considering the residual refractive error was done using a variable keratometric index value (nkadj) for corneal power estimation with and without using an estimation algorithm for ELP obtained by multiple regression analysis (ELPadj). PIOLadj was compared to the real IOL power implanted (PIOLReal, calculated with the SRK-T formula) and also to the values estimated by the Haigis, HofferQ, and Holladay I formulas. Results: No statistically significant differences were found between PIOLReal and PIOLadj when ELPadj was used (P = 0.10), with a range of agreement between calculations of 1.23 D. In contrast, PIOLReal was significantly higher when compared to PIOLadj without using ELPadj and also compared to the values estimated by the other formulas. Conclusions: Predictable refractive outcomes can be obtained with the accommodating IOL Crystalens HD using a variable keratometric index for corneal power estimation and by estimating ELP with an algorithm dependent on anatomical factors and age.

Building from building waste: The development of an instrument to determine the circularity of materials from the existing building stock in order to maximise high quality reuse

On a global level the population growth and increase of the middle class lead to a growing demand on material resources. The built environment has an enormous impact on this scarcity. In addition, a surplus of construction and demolition waste is a common problem. The construction industry claims to recycle 95% of this waste but this is in fact mainly downcycling. Towards the circular economy, the quality of reuse becomes of increasing importance. Buildings are material warehouses that can contribute to this high quality reuse. However, several aspects to achieve this are unknown and a need for more insight into the potential for high quality reuse of building materials exists. Therefore an instrument has been developed that determines the circularity of construction waste in order to maximise high quality reuse. The instrument is based on three principles: ‘product and material flows in the end of life phase’, ‘future value of secondary materials and products’ and ‘the success of repetition in a new life cycle’. These principles are further divided into a number of criteria to which values and weighting factors are assigned. A degree of circularity can then be determined as a percentage. A case study for a typical 70s building is carried out. For concrete, the circularity is increased from 25% to 50% by mapping out the potential for high quality reuse. During the development of the instrument it was clarified that some criteria are difficult to measure. Accurate and reliable data are limited and assumptions had to be made. To increase the reliability of the instrument, experts have reviewed the instrument several times. In the long-term, the instrument can be used as a tool for quantitative research to reduce the amount of construction and demolition waste and contribute to the reduction of raw material scarcity.

Contract for finding all materials and finishing interior of University Hall, signed copy, 1 February 1814

This is a contract signed between Loammi Baldwin, acting on behalf of the President and Fellows of Harvard College, and Josiah Moore, John Walton, Thomas Mason, Samuel Mason, and Joseph Holmes for completing the dining rooms and chapel of University Hall. The agreement was witnessed by Abraham Edwards and Thomas Edwards.

Contract for finding all materials and finishing interior of University Hall, 1 February 1814

Draft of the official signed copy of the contract in Box 1, Folder 42. This copy is written in a different hand and contains several struck through phrases.

Turkey, Middle East, and the South Caucasus, 1771 (Raster Image)

This layer is a georeferenced raster image of the historic paper map entitled: Turcia Asiatica : exhibens Natoliam modernam, in suos beglirbegatus divisam, itemque reliquos beglirbegatus, sive gubernationes et Prfecturas generales, in regionibus Georgiæ, Armeniæ, Mespotamiæ, Syriæ et Arabiæ sitos, una cum Mari Nigro, Mari Azowiensi, Mari di Marmora, et Mari Ægeo, atque adiacentibus Insulis : C. P. S. C. M. = Carte de la Turquie asiatique contenant la Natolie moderne divisée en les beglerbeys &c., ex novissimis subsidiis ac relationibus ad normam legitimae proiectionis in usum belli praesentis delineata impensis homannianorum heredum. It was published by Homannianorum Heredum in 1771. Scale [ca. 1:4,800,000]. Covers Turkey and portions of the Middle East and the South Caucasus. Map in Latin with title in French. The image inside the map neatline is georeferenced to the surface of the earth and fit to the World Miller Cylindrical projection. All map collar and inset information is also available as part of the raster image, including any inset maps, profiles, statistical tables, directories, text, illustrations, index maps, legends, or other information associated with the principal map. This map shows features such as drainage, cities and other human settlements, territorial and provincial boundaries, shoreline features, and more. Relief shown pictorially. This layer is part of a selection of digitally scanned and georeferenced historic maps from the Harvard Map Collection as part of the Open Collections Program at Harvard University project: Islamic Heritage Project. Maps selected for the project represent a range of regions, originators, ground condition dates, scales, and purposes. The Islamic Heritage Project consists of over 100,000 digitized pages from Harvard's collections of Islamic manuscripts and published materials. Supported by Prince Alwaleed Bin Talal and developed in association with the Prince Alwaleed Bin Talal Islamic Studies Program at Harvard University.

Map of the Indus River and the neighbouring countries: comprising Sind, parts of Beloochistan and Afghanistan, Cashmeer, Punjab, Bhawulpoor, the protected Sikh States, Bickaneer and Jaysulmeer; & the Western Parts of Rajpootana

compiled by order of Government in the Office of the Surveyor General of India [Geo. Everest] from authentic and recent materials April 1834 by J. Graham ; drawn by Ed. Winston and D. F. Chill.

Turkey after the start of negotiations with the European Union - foreign relations and the domestic situation, Part I. OSW Report, June 2007

The start of accession negotiations between Ankara and the EU is vital for the future of both Turkey and the Union, including Poland as its member state, as well as for the geopolitical situation in Eurasia (the Black Sea region, Caucasus, Central Asia and the Middle East). Appreciating the significance of these issues, the Centre for Eastern Studies in early 2005 decided to launch a project entitled "Turkey after the start of negotiations with the European Union - foreign relations and the domestic situation". The goal of this project is to present, within the context of accession negotiations, Turkey's greatest internal challenges as well as Ankara's relations with its neighbour regions, the EU and the USA. This Report is the first of three which will be published as part of the project. The Report includes texts on Turkish-US relations since 2003, major political and social challenges on Turkey's path towards the EU and the current condition of the Turkish economy. The Report was developed between July 2005 and November 2006, over which time CES workers and associates searched for publicly available materials in Poland, Turkey and EU countries, and went on three research trips to Turkey, where they met local researchers, analysts, politicians and officials. The authors of the Report would like to express their gratitude to everyone who have shared their opinions with them, and to the Polish Embassy in Ankara, especially to Ambassador Grzegorz Michalski and Minister Andrzej Ananicz for their expert support and assistance in the authors' work on this Report. This Report does not present the official stance of the Polish government on the issues discussed therein; instead it reflects the personal views of its authors, who have made their best efforts to ensure that their work is reliable.

Atlantic 231Pa/230Th and biogenic opal compilation of the Holocene and the LGM

The strength and geometry of the Atlantic meridional overturning circulation is tightly coupled to climate on glacial-interglacial and millennial timescales, but has proved difficult to reconstruct, particularly for the Last Glacial Maximum. Today, the return flow from the northern North Atlantic to lower latitudes associated with the Atlantic meridional overturning circulation reaches down to approximately 4,000 m. In contrast, during the Last Glacial Maximum this return flow is thought to have occurred primarily at shallower depths. Measurements of sedimentary 231Pa/230Th have been used to reconstruct the strength of circulation in the North Atlantic Ocean, but the effects of biogenic silica on 231Pa/230Th-based estimates remain controversial. Here we use measurements of 231Pa/230Th ratios and biogenic silica in Holocene-aged Atlantic sediments and simulations with a two-dimensional scavenging model to demonstrate that the geometry and strength of the Atlantic meridional overturning circulation are the primary controls of 231Pa/230Th ratios in modern Atlantic sediments. For the glacial maximum, a simulation of Atlantic overturning with a shallow, but vigorous circulation and bulk water transport at around 2,000 m depth best matched observed glacial Atlantic 231Pa/230Th values. We estimate that the transport of intermediate water during the Last Glacial Maximum was at least as strong as deep water transport today.

Mt. Washington and the Sago River"

[From Jasper Cropsey Sketch book, 1855-1856]

Historical materials in the John Fitzgerald Kennedy Library /

Mode of access: Internet.

Second International Conference on Durability of Building Materials and Components, September 14-16, 1981 : preprints.

Item 244

Briefing materials on the direct control programs : price, wage, salary, rent /

"January 1953."

To the actor; on the technique of acting.

Mode of access: Internet.

Development of materials and public relations efforts to promote child passenger safety. Final report.

National Highway Traffic Safety Administration, Washington, D.C.