Practical engineering of hard spin-glass instances

Recent technological developments in the field of experimental quantum annealing have made prototypical annealing optimizers with hundreds of qubits commercially available. The experimental demonstration of a quantum speedup for optimization problems has since then become a coveted, albeit elusive goal. Recent studies have shown that the so far inconclusive results, regarding a quantum enhancement, may have been partly due to the benchmark problems used being unsuitable. In particular, these problems had inherently too simple a structure, allowing for both traditional resources and quantum annealers to solve them with no special efforts. The need therefore has arisen for the generation of harder benchmarks which would hopefully possess the discriminative power to separate classical scaling of performance with size from quantum. We introduce here a practical technique for the engineering of extremely hard spin-glass Ising-type problem instances that does not require "cherry picking" from large ensembles of randomly generated instances. We accomplish this by treating the generation of hard optimization problems itself as an optimization problem, for which we offer a heuristic algorithm that solves it. We demonstrate the genuine thermal hardness of our generated instances by examining them thermodynamically and analyzing their energy landscapes, as well as by testing the performance of various state-of-the-art algorithms on them. We argue that a proper characterization of the generated instances offers a practical, efficient way to properly benchmark experimental quantum annealers, as well as any other optimization algorithm.

Adult orthodontics: internet information and a national survey

Aims: 1. To investigate the reliability and readability of information on the Internet on adult orthodontics. 2. To evaluate the profile and treatment of adults by specialist orthodontists in the Republic of Ireland (ROI). Materials and methods: 1. An Internet search was conducted in May 2015 using three search engines (Google, Yahoo and Bing), with two search terms (“adult orthodontics” and “adult braces”). The first 50 websites from each engine were screened and exclusion criteria applied. Included websites were then assessed for reliability using the JAMA benchmarks, the DISCERN and LIDA tools and the presence of the HON seal. Readability was assessed using the FRES. 2. A pilot-tested questionnaire about adult orthodontics was distributed to 122 eligible specialist orthodontists in the ROI. Questions addressed general and treatment information about adult orthodontic patients, methods of information provision and respondent demographics. Results: 1. Thirteen websites met the inclusion criteria. Three websites contained all JAMA benchmarks and one displayed the HON Seal. The mean overall score for DISCERN was 3.9/5 and the mean total LIDA score was 115/120. The average FRES score was 63.1. 2. The questionnaire yielded a response rate of 83%. The typical demographic profile of adult orthodontic patients was professional females between 25-35 years. The most common incisor relationship and skeletal base was Class II, division 1 (51%) and Class II (61%) respectively. Aesthetic upper brackets and metal lower brackets were the most frequently used appliances. Only 30% of orthodontists advise their adult patients to find extra information on the Internet. Conclusions: 1. The reliability and readability of information on the Internet on adult orthodontics is of moderate quality. 2. The provision of adult orthodontic treatment is common among specialist orthodontists in the Republic of Ireland.

An Examination of Lotka’s law in the Field of Library and Information Studies

The purpose of this study was to test Lotka’s law of scientific publication productivity using the methodology outlined by Pao (1985), in the field of Library and Information Studies (LIS). Lotka’s law has been sporadically tested in the field over the past 30+ years, but the results of these studies are inconclusive due to the varying methods employed by the researchers. A data set of 1,856 citations that were found using the ISI Web of Knowledge databases were studied. The values of n and c were calculated to be 2.1 and 0.6418 (64.18%) respectively. The Kolmogorov-Smirnov (K-S) one sample goodness-of-fit test was conducted at the 0.10 level of significance. The Dmax value is 0.022758 and the calculated critical value is 0.026562. It was determined that the null hypothesis stating that there is no difference in the observed distribution of publications and the distribution obtained using Lotka’s and Pao’s procedure could not be rejected. This study finds that literature in the field of library and Information Studies does conform to Lotka’s law with reliable results. As result, Lotka’s law can be used in LIS as a standardized means of measuring author publication productivity which will lead to findings that are comparable on many levels (e.g., department, institution, national). Lotka’s law can be employed as an empirically proven analytical tool to establish publication productivity benchmarks for faculty and faculty librarians. Recommendations for further study include (a) exploring the characteristics of the high and low producers; (b) finding a way to successfully account for collaborative contributions in the formula; and, (c) a detailed study of institutional policies concerning publication productivity and its impact on the appointment, tenure and promotion process of academic librarians.

Evaluating Document Retrieval Methods for Resource Selection in Clustered P2P IR

Resource Selection (or Query Routing) is an important step in P2P IR. Though analogous to document retrieval in the sense of choosing a relevant subset of resources, resource selection methods have evolved independently from those for document retrieval. Among the reasons for such divergence is that document retrieval targets scenarios where underlying resources are semantically homogeneous, whereas peers would manage diverse content. We observe that semantic heterogeneity is mitigated in the clustered 2-tier P2P IR architecture resource selection layer by way of usage of clustering, and posit that this necessitates a re-look at the applicability of document retrieval methods for resource selection within such a framework. This paper empirically benchmarks document retrieval models against the state-of-the-art resource selection models for the problem of resource selection in the clustered P2P IR architecture, using classical IR evaluation metrics. Our benchmarking study illustrates that document retrieval models significantly outperform other methods for the task of resource selection in the clustered P2P IR architecture. This indicates that clustered P2P IR framework can exploit advancements in document retrieval methods to deliver corresponding improvements in resource selection, indicating potential convergence of these fields for the clustered P2P IR architecture.

Coimbra: cidade amiga das pessoas idosas?!

Introdução: Em Portugal, bem como nos restantes países mundiais, tem sido registado, em virtude de múltiplas transformações societárias, um aumento crescente do envelhecimento demográfico. Este novo cenário demográfico originou uma reflexão, por parte de organizações supranacionais, sobre as cidades na sua relação com os munícipes mais velhos. Desta reflexão surge o projeto Cidade Amiga das Pessoas Idosas que apresenta referenciais de avaliação das cidades para que estas possam adaptar as suas estruturas e serviços aos seus munícipes mais velhos. Beneficiando desta forma do potencial que as pessoas mais velhas representam para a humanidade. Objetivos: O presente estudo tem como objetivo central verificar se a cidade de Coimbra é uma cidade amiga das pessoas idosas. Metodologia: A pesquisa remete para um estudo qualitativo exploratório a partir dos procedimentos metodológicos que constam do Protocolo de Vancouver. O focus group decorreu em duas sessões. Participantes: Foram auscultados 16 pessoas, 15 (93,8%) do sexo feminino. A idade média situa-se nos 79,88 anos (dp= ± 10,658), são maioritariamente viúvos (7= 43,8 %) e 7 (43,8%) e têm como habilitações a 4ª classe. Autoclassificam-se maioritariamente na classe média baixa (7 =43,8). Resultados: Das oito categorias analisadas três categorias “espaços exteriores e edifícios”, “transportes” e “respeito e inclusão social” são avaliadas com aspetos positivos e negativos. O “suporte comunitário e serviços de saúde” é avaliado como positivo enquanto a “habitação”, “participação social” e “comunicação e informação” são avaliados como negativos. As sugestões efetuadas referem-se a um único tópico “espaços exteriores e edifícios”. Conclusões: Se partilharmos a tese que uma cidade amiga das pessoas idosas estimula o envelhecimento ativo porque otimiza as oportunidades de participação no ambiente urbano melhorando, desta forma, a qualidade de vida das pessoas envelhecem. Os resultados que obtivemos, a partir da auscultação de um grupo de idosos, permitem-nos afirmar que Coimbra precisa de se adaptar aos seus munícipes mais velhos. Só assim Coimbra se poderá tornar uma cidade amiga das pessoas idosas. Importa igualmente registar que os resultados encontrados devem ser mediados pelo perfil sociodemográfico dos idosos entrevistados. / Introduction: In Portugal, as well as in other countries worldwide, has been registered by virtue of multiple associated transformations, an increasing growing of population. This new demographic scenario triggered, led to a reflection on the part of supranational organizations, about the cities in their relationship with the older residents. This reflection comes with the project Friendly City of Older Persons that presents benchmarks for the evaluation of cities so that they can adapt their structures and services to its older citizens. Enjoying this way the potential that older people represent for humanity. Objectives: This study aims to check if the city of Coimbra is an elderly friendly city. Methodology: The research refers to an exploratory qualitative study from the methodological procedures of the Vancouver Protocol. The focus group was held in two sessions. Participants: 16 people were sounded out, 15(93.8%) were female. The average ages tends at79.88 years (dp = ±10,658), are mostly widowers (7=43.8%) and 7 (43.8%) have the qualifications to4th grade. They are classified mostly in the lower middle class(7=43.8). Results: Of the eight analyzed categories three categories" outdoor spaces and buildings", "transport" and "respect and social inclusion" are evaluated on positive and negative aspects. The "community support and health services" is evaluated as positive as the"housing", "social participation "and "communication and information" are evaluated as negative. The suggestions are related to a single topic "buildings and outdoor areas." Conclusions: If we share the view that an elderly friendly citizen courages active aging because it optimizes the opportunities for participation in the urban environment improving, in this manner, the quality of life of the elderly. The results we obtained from the consultation of a group of elderly allow us to say that Coimbra needs to adapt to its older citizens. Only then Coimbra can become a friendly city of the elderly. It should also be noted that the results should be mediated by socio-demographic profile of elderly respondents.

Hotel Sustainability Benchmarking Index 2016: Energy, Water, and Carbon

Several studies have been undertaken or attempted by industry and academe to address the need for lodging industry carbon benchmarking. However, these studies have focused on normalizing resource use with the goal of rating or comparing all properties based on multivariate regression according to an industry-wide set of variables, with the result that data sets for analysis were limited. This approach is backward, because practical hotel industry benchmarking must first be undertaken within a specific location and segment.1 Therefore, the CHSB study’s goal is to build a representative database providing raw benchmarks as a base for industry comparisons.2 These results are presented in the CHSB2016 Index, through which a user can obtain the range of benchmarks for energy consumption, water consumption, and greenhouse gas emissions for hotels within specific segments and geographic locations.

Les métamorphoses du rapport politique à la mort (recherche de pivots structurant la réflexion en médecine palliative)

Notre recherche explore quelques moments forts des métamorphoses du rapport politique à la mortalité sous examen des thèmes de l’interdit, de la dignité, de l’autonomie et de l’altérité. Nous dégageons des ancrages propices à nourrir la pensée actuelle en médecine palliative. Ainsi, nous livrons une enquête philosophique, appréciant pour nous Occidentaux, les influences marquantes des pensées gréco-romaine, chrétienne et moderne. Ces bases, édifiant notre monde politique, ont suscité l’émergence de la médecine palliative. C’est pourquoi, nous tentons de caractériser et de comprendre les problématiques nouvelles, dans leurs aspects politique et éthique, envisagées à l’aune des formes contemporaines d’accompagnement des mourants. Notre effort tente de discerner les aspirations et les impasses. L’étude de la métamorphose des repères fait ressortir une dissociation accentuée au fil du temps. En effet, au fur et à mesure, notre entreprise d’interprétation du fondement de ces questions politiques dévoilait : une reconnaissance universelle de l’interdit d’homicide, mais accusant une perte du lien moral au profit d’une visée amorale ; un aval unanime du respect de la dignité, mais manifestant une confusion et une division ostensible entre conceptions intrinsèque et extrinsèque ; une affirmation péremptoire de l’autonomie, mais avec une distanciation marquée au regard de la façon d’envisager la part de l’autre ; une déclinaison de liens humains reconnus de tous, mais exacerbés dans une tension artificielle entre individualisme et altruisme. Au surplus, en constatant la distance et la dislocation entre le public et le privé, entre la réclamation de fraternité et la recherche d’amicalité signifiante, nous avons envisagé la communauté palliative comme un lieu de résistance à cette décomposition menaçante au sein de la communauté politique. À terme de l’analyse, nous avons fondé les concepts « d’allonomie » et de « suspension éthique ». Il s’agit de contributions originales destinées à donner à la philosophie toute sa dimension sapientielle au service de l’accompagnement palliatif.

A three dimensional finite volume approach to the thermo-mechanical modelling of the shape casting of metals

This paper presents a three dimensional, thermos-mechanical modelling approach to the cooling and solidification phases associated with the shape casting of metals ei. Die, sand and investment casting. Novel vortex-based Finite Volume (FV) methods are described and employed with regard to the small strain, non-linear Computational Solid Mechanics (CSM) capabilities required to model shape casting. The CSM capabilities include the non-linear material phenomena of creep and thermo-elasto-visco-plasticity at high temperatures and thermo-elasto-visco-plasticity at low temperatures and also multi body deformable contact with which can occur between the metal casting of the mould. The vortex-based FV methods, which can be readily applied to unstructured meshes, are included within a comprehensive FV modelling framework, PHYSICA. The additional heat transfer, by conduction and convection, filling, porosity and solidification algorithms existing within PHYSICA for the complete modelling of all shape casting process employ cell-centred FV methods. The termo-mechanical coupling is performed in a staggered incremental fashion, which addresses the possible gap formation between the component and the mould, and is ultimately validated against a variety of shape casting benchmarks.