bluuebunny/crossref_metadata_2025 huggingface dataset:
C iv Emission-line Properties and Uncertainties in Black Hole Mass Estimates of z ∼ 3.5 Quasars
Authors: Zuo Wenwen , Wu Xue-Bing , Fan Xiaohui , Green Richard , Yi Weimin , Schulze Andreas , Wang Ran , Bian Fuyan
Published: June 2020

Using a high-luminosity (L
bol ∼ 1047.5–1048.3 erg s−1), high-redshift (3.2 < z < 3.8) quasar sample of 19 quasars with optical and near-infrared spectroscopy, we investigate the reliability of the C iv-based black hole mass estimates (M
BH). The median logarithm of the C iv- and Hβ-based M
BH ratios is 0.110 dex, with a scatter of 0.647 dex. The C iv-to-Hβ BH mass differences are significantly correlated with the C iv FWHMs, blueshifts, and asymmetries. Corrections of the C iv FWHM using the blueshift and asymmetry reduce the scatter of the mass differences by ∼0.04–0.2 dex. Quasars in our sample accrete at the Eddington ratio R
EDD > 0.3 and cover a considerable range of blueshifts, with 18/19 of the quasars showing C iv blueshifts (with the median value of 1126 km s−1) and 14/19 of the quasars showing C iv blueshifts larger than 500 km s−1. It suggests that not all quasars with high Eddington ratios show large blueshifts. The Baldwin effect between the C iv rest-frame equivalent width (REW) and the continuum luminosity at 1350 Å is not seen, likely due to the limited luminosity range of our sample. We find a lack of flux in the red wing of the composite spectrum with larger C iv blueshift and detect a higher ratio of [O iii] quasars with REW[O iii] > 5 Å in the subsample with lower C iv blueshift. It is more likely that they are caused by the combination of the Eddington ratio and the orientation effect.
Hemispheric Handedness in the Galactic Synchrotron Polarization Foreground
Authors: Brandenburg Axel , Brüggen Marcus
Published: June 2020

The large-scale magnetic field of the Milky Way is thought to be created by an αΩ dynamo, which implies that it should have opposite handedness north and south of the Galactic midplane. Here we attempt to detect a variation in handedness using polarization data from the Wilkinson Microwave Anisotropy Probe. Previous analyzes of the parity-even and parity-odd parts of linear polarization of the global dust and synchrotron emission have focused on quadratic correlations in spectral space of, and between, these two components. Here, by contrast, we analyze the parity-odd polarization itself and show that it has, on average, opposite signs in northern and southern Galactic hemispheres. Comparison with a Galactic mean-field dynamo model shows broad qualitative agreement and reveals that the sign of the observed hemispheric dependence of the azimuthally averaged parity-odd polarization is not determined by the sign of α, but by the sense of differential rotation.
Host relationships and geographic distribution of species of Acanthobothrium Blanchard, 1848 (Onchoproteocephalidea, Onchobothriidae) in elasmobranchs: a metadata analysis
Authors: Zaragoza-Tapia Francisco , Pulido-Flores Griselda , Gardner Scott L. , Monks Scott
Published: June 2020

Species ofAcanthobothriumhave been documented as parasites of the spiral intestine of elasmobranchs. Results of a metadata analysis indicate that 114 species of elasmobranchs have been reported as hosts of 200 species ofAcanthobothrium. The metadata analysis revealed that 3.7% of species of sharks and 14.9% of species of rays that have been reported as hosts to date; some species are parasitized by more than one species ofAcanthobothrium. This work provides a Category designation, as proposed by Ghoshroy and Caira (2001), for each species ofAcanthobothrium. These Category designations are a tool to facilitate comparisons among members ofAcanthobothriumfor descriptions of new species in the future.
Contre-culture en Allemagne : un autre modèle de réunification ?
Authors: Pailhès Anne-Marie
Published: June 2020

La culture « alternative » qui avait vu le jour en RFA dans les années 1970 et 1980 s’est exportée en ex-RDA après la réunification. Elle y a pris diverses formes qui ont subi le même destin que dans l’ensemble de l’Allemagne : marginalisation de ses manifestations urbaines du fait de la gentrification des métropoles européennes (comme dans le cas des squats), intégration d’autres éléments de la culture parallèle dans l’économie dominante. L’exemple des communautés alternatives rurales montre comment ce type de contre-culture s’est imposé avec des codes empruntés à l’Ouest, au sein même d’expériences qui disent dépasser les contradictions Est-Ouest. La communauté Lebensgut Pommritz illustre la tension entre deux conceptions de la recherche d’alternatives sociales : d’une part, la conviction de Rudolf Bahro selon laquelle une collaboration avec l’État est nécessaire pour mener à bien des expériences sociales telles que l’autosubsistance ou le revenu de base et d’autre part, la nécessité pour toute forme de contre-culture de conserver autonomie et indépendance par rapport à des structures de pouvoir. L’échec de la communauté, l’une des rares initiatives contre-culturelles d’envergure en Allemagne de l’Est, rend pessimiste sur l’existence d’une culture alternative est-allemande autonome qui ne soit pas le produit d’une domination culturelle.
L’évolution du territoire allemand depuis 1990 : de l’homogénéité à la disparité
Authors: Grésillon Boris
Published: June 2020

Depuis une trentaine d'années, le territoire allemand s'est considérablement transformé. À la classique division entre une RFA polycentrale et une RDA très centralisée a succédé le big bang territorial des années 1990-2000, caractérisé par la fusion des deux Allemagne et l'accouchement dans la douleur d'un pays inédit. Aujourd'hui, bien des contraintes ont été surmontées mais des différences socio-économiques demeurent entre la partie occidentale et la partie orientale du pays. Cela dit, le schéma de division territoriale classique entre l'Ouest et l'Est du pays laisse progressivement la place, dans la dernière décennie (2010-2020), à un schème d'organisation de type concurrentiel bien plus complexe qui exploite les atouts ou au contraire les faiblesses des territoires à toutes les échelles, nationale, régionale, infra-régionale et locale. Cet article dresse un bilan de trente ans de transformations territoriales en Allemagne.
Chronique cinéma ou Les déliquescences d’un cinéphile confiné
Authors: Bernardy Jean-Pierre
Published: June 2020

L’objet de cette chronique est d’évoquer les films de réalisateurs germanophones que le public français a eu l’occasion de découvrir récemment. Elle prend dans ce numéro un caractère particulier en raison de la crise du coronavirus. En effet, rares sont les films allemands ou autrichiens qui ont pu sortir avant la fermeture des salles à la mi-mars et plusieurs ont vu leur carrière brutalement interrompue. Mais les chaînes de télévision, très généreuses en cette période de confinement, ont permis aux cinéphiles motivés de revoir, ou de découvrir, des films allemands plus anciens.
L’influence réciproque de la maison intelligente sur les styles de vie et ses implications sur la fonction d’architecte
Authors: Marchand Geoffrey , Dufour Stéphane
Published: June 2020

L’habitat intelligent est apparu ces dernières années comme une tendance émergente et désormais courante. Cet article porte une double interrogation : comment l’habitat agit sur les manières de vivre, en imposant à ses usagers une modification des habitudes qui, au-delà des simples actions quotidiennes, change jusqu’à leur philosophie de vivre, ce que nous appelons le « style de vie ». Conjointement, il s’agit d’interroger la perceptive de l’architecte concepteur, à l’origine de la maison connectée, qui découvre une nouvelle dimension éthique pour sa profession : celui de comprendre comment et pourquoi les habitudes connectées des usagers changent, et comment leur proposer une architecture adaptée, une architecture modale.
De la domestication technologique à la domesticité numérique : le futur des conditions éthiques de l’habiter (I)
Authors: Laurent Viala
Published: June 2020

À la croisée des principes fondamentaux de l’architecture et de l’étude des imaginaires nichés au cœur des œuvres de fiction, ce texte vise le futur des conditions de l’habiter. Adoptant une perspective historique, le dialogue organisé entre domestication technologique et domesticité numérique pose les cadres éthiques de ce futur possible. L’intelligence de la maison comme une réalité intrinsèque possiblement garantie par le seul acte d’architecture est proposée. Elle est confrontée ensuite à l’impact de l’interface homme/machine sur l’environnement physique de la maison. Un troisième point sonde les incidences de la montée en technologie pour l’habitant qui vient, l’habiter et plus globalement l’humanisme encouragé.
Écrire l’histoire en images. Les historiens et la tentation de la bande dessinée
Authors: Lesage Sylvain
Published: June 2020

Quatre décennies après le succès éditorial de l’« Histoire de France en bandes dessinées », ce sont les historiens qui s’emparent aujourd’hui de la médiation visuelle de l’histoire par la bande dessinée. Ces initiatives s’inscrivent dans le temps long des mises en images de l’histoire, des planches didactiques de l’imagerie d’Épinal aux dispositifs de catéchèse visuelle en passant par les rubriques documentaires de la presse enfantine. Le regain de médiations visuelles de l’histoire est aussi à inscrire dans un contexte de recompositions du périmètre de la bande dessinée et de redéfinition des frontières entre fiction et non-fiction. Cet article explore les nouvelles formes d’écriture historique offertes par la narration visuelle, et les processus de médiation qui permettent de toucher de nouveaux lectorats.
Sous l’œil des Houillères . Retour sur une expérience documentaire
Authors: Fontaine Marion
Published: June 2020

L’intérêt et l’engagement des historiens dans les expériences d’écriture documentaire n’ont cessé de s’accroître ces dernières années. Cet article entend revenir sur l’une de ces expériences, à laquelle j’ai participé de manière étroite, et qui a abouti au documentaire intitulé Sous l’œil des Houillères (2017), dont je suis l’auteure avec le réalisateur Richard Berthollet. Il s’agit de traiter cette expérience comme un cas bon à penser, à la fois pour lui-même et pour les enjeux plus généraux qu’il soulève. On s’interroge en particulier sur les relations entre historiens d’une part et professionnels du documentaire (réalisateurs notamment) d’autre part, sur les différents paramètres du dialogue qui peut s’établir entre eux, comme sur les ressemblances qui se manifestent et les différences qui demeurent dans leur rapport au savoir et à l’objet historiques.
Entendre l’histoire pour comprendre son élaboration : des bulles sonores à la webapp « passe-ici.fr »
Authors: Backouche Isabelle , Gensburger Sarah
Published: June 2020

Isabelle Backouche et Sarah Gensburger décrivent leur expérience de valorisation des recherches scientifiques qu’elles produisent. Animées par le souci de faire partager au plus grand nombre ces connaissances, à des fins citoyennes et pour répondre aux injonctions de leurs institutions qui portent le message de l’utilité des sciences sociales, elles ont depuis près de cinq ans surmonté plusieurs écueils pour parvenir à imposer l’idée que les chercheurs et chercheuses doivent être moteurs dans cette entreprise, sans laisser la part belle aux professionnels du numérique. Elles sont parvenues ainsi à élaborer plusieurs balades sonores dans Paris, partant du principe qu’il faut ancrer une histoire sociale dans le territoire parisien, et à coconstruire une webapp qui peut offrir des chemins sonores au plus grand nombre grâce à l’usage du smartphone. Au-delà de ces enjeux sociaux, elles analysent également les défis épistémologiques soulevés par leur démarche de médiation, montrant que cette dernière n’est pas du tout éloignée des exigences du métier d’historien. Leur engagement dans la valorisation est aussi une manière de mettre en doute certaines dérives du monde de la recherche, notamment les humanités numériques, grand vertige techniciste qui emporte l’adhésion sans qu’aucun programme de recherche ne les accompagne.
Le carnet de recherche. Un nouvel outil dans l’écriture d’une histoire du temps présent
Authors: Rahal Malika
Published: June 2020

Le présent article s’intéresse à la place de la rédaction d’un blog (ou carnet de recherche) dans le travail des historiens, en partant du carnet Textures du temps , consacré à l’histoire de l’Algérie contemporaine et présent sur la plateforme Hypothèses depuis 2012. L’article caractérise l’écriture historienne permise par le blog et la compare aux écritures plus traditionnelles. Il décrit les circulations de textes entre différents supports (du blog aux revues ou aux médias) ainsi que les liens, en amont et en aval de la mise en ligne, entre réseaux sociaux et blog. Cette écriture renouvelle les relations entre historiens et témoins et ouvre une diffusion de la recherche sous des formes et vers des publics différents, contribuant à une histoire du temps présent dont l’ambition est d’être désormais mondiale.
The airport A-CDM operational implementation description and challenges
Authors: Netto Omar , Silva Jorge , Baltazar Maria
Published: June 2020

Purpose: This research aims to address an issue that today is a significant challenge for all signatory countries of the International Civil Aviation Organization (ICAO). The implementation of the areas for improving practices recommended in the Global Navigation Plan (GANP). More specifically on the theme of Airport Collaborative Decision Making (CDM), which involves three of the most critical stakeholders in the Air Sector, which are Airlines, Airports and Air Traffic Control Bodies.Design/methodology: The strategy chosen to achieve the objective is to present the vision of the leading entities that represent the aviation area. Thus, the methodology of the Case Study, more precisely the Multiple Case Study, is one of the bases in the elaboration of the article, in the sense that analyses and recommendations prepared by Central Aviation Organizations are carried out, as well as by other entities that bring together the Sector members.Findings: In addition to having a basis for the functioning of a Collaborative Decision Making (CDM) process within the Air Sector -because of the extreme dynamics of the sector-, readers will have a signal of the importance of having a systematic backing of document contents ICAO before starting any professional or research work. Mainly from the GANP document, a compass for these activities in the coming decades.Practical implications: Academics and members of the Air Sector will have a brief reference and focused on the practical application of this topic, which still has very few approaches in academic research sources.Originality/value: The educational form in which this article is sequenced, as well as the different views presented, can serve as a guide for the understanding of all those interested in the airline industry. Making it an original document in its content and of great value to its professionals and researchers.
Oral tranexamic acid for bleeding during spinal surgery: A randomized double-blind placebo clinical trial
Authors: Rasras Saleh , Mamizadeh Nour Mohammad , Safari Hossein , Kiani Arash , Rahimi Zahra
Published: June 2020

Objectives

This study aimed to evaluate the oral Tranexamic acid (TXA) effect on the bleeding during spine surgery amounts.

Patients and Methods

In this randomized double-blind placebo clinical trial, patients with lumbar spinal cord and back pain disease, those who needed fusion or were candidates for bilateral or more or equal to two levels surgeries, and those who referred to the Neurosurgery Department, were included and randomly divided into two equal groups. TXA was orally administered at 25 mg/kg dosages four times a day before surgery and 500 mg in the morning of surgery. The bleeding amount during the operation was calculated based on the number of sterile pads used during the operation and the amount of bleeding collected in the suction device (suction) in milliliters. Each sterile pad soaked in blood is equal to 50 ml of bleeding. The suction blood content at the end of the operation (in milliliters), was also collected by bleeding in sterile pads and reported in milliliters. The difference in hemoglobin level 24 after surgery was compared to before surgery. The follow-up period was until discharge from the hospital.

Results

No significant difference was seen in the demographic data between the two groups (p < 0.05). Oral TXA had a positive effect on the intraoperative and postoperative bleeding amounts, and hospitalization duration, and it significantly reduced bleeding in the mentioned cases (p < 0.05 in all cases). Moreover, no significant differences were observed in coagulation factors, including PT, INR, and coagulation tests between the two groups, even PTT was increased. Oral TXA increased nausea and vomiting experienced by patients in the intervention group (p < 0.05).

Conclusions

Overall, oral TXA significantly reduced the intraoperative and postoperative bleeding, as well as the hospitalization duration in patients undergoing spinal surgery in comparison with the placebo group. Because of its anti-fibrinolytic properties, TXA effectively controlled bleeding. Thus, the intraoperative bleeding amount was decreased with the TXA administration.
Advances in Computational Linguistics and Text Processing Frameworks
Authors: Srivastav Ayush , Khan Hera , Mishra Amit Kumar
Published: June 2020

The chapter provides an eloquent account of the major methodologies and advances in the field of Natural Language Processing. The most popular models that have been used over time for the task of Natural Language Processing have been discussed along with their applications in their specific tasks. The chapter begins with the fundamental concepts of regex and tokenization. It provides an insight to text preprocessing and its methodologies such as Stemming and Lemmatization, Stop Word Removal, followed by Part-of-Speech tagging and Named Entity Recognition. Further, this chapter elaborates the concept of Word Embedding, its various types, and some common frameworks such as word2vec, GloVe, and fastText. A brief description of classification algorithms used in Natural Language Processing is provided next, followed by Neural Networks and its advanced forms such as Recursive Neural Networks and Seq2seq models that are used in Computational Linguistics. A brief description of chatbots and Memory Networks concludes the chapter.
Espousal of Industry 4.0 in Indian Manufacturing Organizations
Authors: Kumar Ravinder
Published: June 2020

A formal industrialization commenced with steam power generation and the application of machines that mechanized the industrial work in past. Subsequently, the development in electric power, the assembly lines, and mass manufacturing led toward the third era of numeric control and automation. Now in modern era of industry 4.0, robots connected with the computers and machines. Tools are working on machines learning algorithms and running the cyber physical manufacturing systems. Sensing the need of hour, Indian manufacturing organizations are working hard to implement the practices of Industry 4.0. Working on identical direction, the author has identified 12 enablers poignant the espousal of Industry 4.0 in Indian manufacturing sectors from literature review and by opinion of experts. Further, the author has used Decision Making Trial and Evaluation Laboratory (DEMATEL) technique for developing the structural and circumstantial kinship among the enablers of Industry 4.0.
Interactional Resource Adoption
Authors: Chakraborty Samyadip , Bhatt Vaidik
Published: June 2020

Technology is helpful not only in increasing the standard of living but also increasing life expectancy of a human. In a developing country like India, healthcare resources show skewed distribution. This unevenly distributed resources are a reason for healthcare service divide in India. When ICT (Information and Communication Technology) resources are connected and integrated with non – ICT human resources, interactional resources are generated. This study theoretically proposes to fill the gap between healthcare services by using the interactional resources. The study uses the theory building approach with case studies to propose a theoretical model.
E-Learning and Its Practical Application for Growth and Success in Industries
Authors: Awasthi Disha
Published: June 2020

E-learning is on the rise continuously with day-to-day innovations in the technology. Now, one can see the increasing trend in the use of Mobile Learning, Virtual Reality, Games, Videos, Social Media, Interactive Tutorials, etc. as e-learning has become a life-long learning tool. E-learning uses the approach of – Anywhere, Anytime, Anyone. Use of internet, social networking groups are keeping people updated with the latest happenings around the world. Model of e-learning proposed in the chapter for implementation in the industries covers linkages with the various existing systems and provides an effective way to create a culture supportive of e-learning.
Basic Marketing Strategies and Marketing Mix in Small-Scale Sports Events
Authors: Yuruk-Kayapinar Pinar
Published: June 2020

The main purpose of this chapter is to explore how small-scale sports events are marketed and what issues are important when marketing them. For this purpose, literature review was made by considering the issues related to event marketing. The success of events depends largely on their marketing. Especially considering the important effects of these events on the location, it is important that the marketing plan process of small-scale sports events, who the event consumers are, why they want to participate in the event, and how they follow the process participate in the event. In addition, it is an important issue why the 5W's of marketing are important for small-scale sports events. The marketing mix of small-scale sports events, which is created to address these questions, and IMC, which is developed specifically for events, are two of the most important tools in event marketing.
Multi-Factor Performance Comparison of Amazon Web Services Elastic Compute Cluster and Google Cloud Platform Compute Engine
Authors: Ahuja Sanjay P. , Czarnecki Emily , Willison Sean
Published: June 2020

Cloud computing has rapidly become a viable competitor to on-premise infrastructure from both management and cost perspectives. This research provides insight into cluster computing performance and variability in cloud-provisioned infrastructure from two popular public cloud providers. A comparative examination of the two cloud platforms using synthetic benchmarks is provided. In this article, we compared the performance of Amazon Web Services Elastic Compute Cluster (EC2) to the Google Cloud Platform (GCP) Compute Engine using three benchmarks: STREAM, IOR, and NPB-EP. Experiments were conducted on clusters with increasing nodes from one to eight. We also performed experiments over the course of two weeks where benchmarks were run at similar times. The benchmarks provided performance metrics for bandwidth (STREAM), read and write performance (IOR), and operations per second (NPB-EP). We found that EC2 outperformed GCP for bandwidth. Both provided good scalability and reliability for bandwidth with GCP showing a slight deviation during the two-week trial. GCP outperformed EC2 in both the read and write tests (IOR) as well as the operations per second test. However, GCP was extremely variable during the read and write tests over the two-week trial. Overall, each platform excelled in different benchmarks and we found EC2 to be more reliable in general.
A Study of Relationship Among Service Quality of E-Commerce Websites, Customer Satisfaction, and Purchase Intention
Authors: Dhingra Sanjay , Gupta Shelly , Bhatt Ruchi
Published: June 2020

The purpose of this study is to analyze the impact of online service quality of e-commerce websites on customer satisfaction and purchase intention. The study identifies the dimensions of e-service quality on the basis of the literature review, which are website design, reliability, responsiveness, trust, and personalization. A survey of 278 avid users of three popular websites was taken to validate the model. The reliability and validity of the questionnaire were checked through the measurement model and the structural equation model was used to confirm the relationship among the dimensions. The result shows that trust is the only e-service quality dimension that significantly influences overall service quality. The relationship between overall e-service quality and customer satisfaction as well as customer satisfaction and purchase intention was found statistically significant.
How Social Commerce Characteristics Influence Consumers' Online Impulsive Buying Behavior in Emerging Markets
Authors: Phan Quyen Phu Thi , Ngo Vu Minh , Phuoc Nguyen Cao Lien
Published: June 2020

With the rapid development of social commerce, consumers may easily purchase products they did not plan to purchase or do not really need when they surf social networking websites and browse posts. However, the literature on social commerce pays little attention to the extant knowledge of online impulse buying behavior (OIBB), especially in emerging markets. This study investigates the role of social commerce characteristics in shaping consumers' online impulsive buying behavior. Data was collected from 240 Vietnamese consumers with experience in online shopping. Using a Partial Least Square 3.0 analysis, the results indicated that socialization and availability of information significantly influence the urge to buy impulsively, but do not influence impulsive behavior. In contrast, personalization and product selection influence both the urge to buy impulsively and impulsive behavior. The findings also indicated that gender and age do not impact online impulsive buying behavior. Study outcomes offer useful insights to both academicians and practitioners.
Conceptualising the Use of Digital Technologies in Spatial Planning
Authors: Goodchild Barry
Published: June 2020

This article is about how best to frame the use of digital technology in spatial planning and how best to frame the evaluation of impact. The different sections argue the following points. First, the conceptualisation of digital technologies in spatial planning should pay less attention to the discourse of smart cities and more to pragmatic approaches that can cope with the Janus-faced character of technology and provide a bridge to planning theory. Then, as revealed by the assumptions of actor network theory, there are three main innovation paths—Prop-Tech, Civic-Tech, and Project-Tech—all of which have a different pattern of beneficiaries. Then, as revealed by structuration theory and unless moderated by professional ethics and explicit policy commitments, technology is likely to be concerned with the cost effectiveness of working practices. Finally, taking the various approaches together, spatial planning may be conceptualised as a field of heterogeneous elements (stakeholders and citizens, technology, place) with non-local governance and markets as external structuring forces.
Pasikola
Authors: Putra Zulfikar Dinar Wahidayat , van der Knaap Wim G.M.
Published: June 2020

In this digital era, innovation becomes an important element within urban planning and management to support a more effective and efficient urban service. Until now, most of the local governments in Indonesia still rely on a fully top-down approach to solve urban transportation problems. This article investigates the co-creation process in solving an urban transportation problem in Makassar City, Indonesia, by analyzing key success factors of the process. A literature review and semi-structured interviews were used to gather data from key actors involved in the process. It revealed that there are five important factors contributing to the success of a co-creation process, namely back up from the mayor, diversity of stakeholder involvement, local NGO facilitation, international NGO facilitation, and a committed team. A combination of the top-down approach and co-creation, as a participatory approach, and utilization of digital means seems to offer an opportunity for a more effective and impactful urban solution implementation in a contemporary (Indonesian) city.
The Effects of Mobile Learning in an EFL Class on Self-Regulated Learning and School Achievement
Authors: Seifert Tami , Har-Paz Carla
Published: June 2020

The objective of this research was to find out whether the implementation of mobile learning pedagogies in a high school classroom can educate high school students to become independent learners, who are able to regulate their learning, improve their achievements. The findings have been analyzed by taking into consideration the self-regulation scales of motivation and learning strategies, together with the significance of the students' scores. The results of this study show that the implementation of a mobile learning teaching unit does not affect the self-regulation learning abilities of the students. However, it does reveal an increase in external and internal motivation together with a shift in the application of learning strategies. As a result, a two-stage model has been proposed aiming to educate teenagers to become agents of their learning while they practice mobile learning as well as implementation of mobile seamless learning to promote a self-regulated learning.
Design and Implementation of an Anti–Factor Xa Heparin Monitoring Protocol
Authors: Williams-Norwood Tanya , Caswell Megan , Milner Barbara , Vescera Joseph C. , Prymicz Kelly , Ciszak Amy G. , Ingle Carol , Lacey Christopher , Stavrou Evi X.
Published: June 2020

Background:

The VA Northeast Ohio Healthcare System introduced a new nurse-driven anti–factor Xa (anti-Xa) protocol for monitoring unfractionated heparin to replace the previous activated partial thromboplastin time protocol.

Objective:

To design, implement, and evaluate the efficacy of the anti-Xa monitoring protocol.

Methods:

An interdisciplinary team of providers collaborated to develop and implement a nurse-driven, facility-wide anti–factor Xa protocol for monitoring unfractionated heparin therapy. The effectiveness of this protocol was evaluated by retrospective analysis.

Results:

We reviewed 100 medical records for compliance with the new anti-Xa monitoring protocol. We then evaluated 178 patients whose anticoagulation was monitored with the anti-Xa assay to determine the time to therapeutic range. We found that 80% of patients receiving the anti-Xa protocol achieved therapeutic anticoagulation within 24 hours, as compared with 54% of patients receiving the activated partial thromboplastin time protocol (P < .001). Protocol conversion also yielded a decrease in blood draws, dose adjustments, and potential calculation errors.

Conclusions:

Monitoring intravenous heparin therapy with the anti-Xa assay rather than activated partial thromboplastin time resulted in a shorter time to therapeutic anticoagulation, longer maintenance of therapeutic levels, and fewer laboratory tests and heparin dosage changes. We believe the current practice of monitoring heparin treatment with activated partial thromboplastin time assays should be reexamined.
Sulphide clast-bearing felsic volcaniclastic units of the Rouyn-Pelletier Formation: comparison with similar units of the Horne Block, Rouyn-Noranda, Abitibi greenstone belt, Quebec
Authors: Boudreau C , Mercier-Langevin P , Krushnisky A , Goutier J
Published: June 2020

Sulphide clast-bearing volcaniclastic units are a key exploration vector towards volcanogenic massive sulphide deposits. These marker units are commonly associated with base and precious metal-rich volcanogenic massive sulphide deposits of the Archean Abitibi
greenstone belt. One such sulphide (pyrite ±sphalerite-chalcopyrite) clast-bearing felsic volcaniclastic unit is present in the uppermost part of the Rouyn-Pelletier Formation of the Blake River Group in Rouyn-Noranda. The Rouyn-Pelletier Formation is in faulted contact (Andesite fault) with
the rocks of the Horne Formation, which are of the same age and style, are sulphide clast-bearing, and host to the giant Horne Au-rich volcanogenic massive sulphide deposit. This raises the question of a possible stratigraphic correlation between the Rouyn-Pelletier (upper part) and Horne
formations, with the potential for major implications for exploration in the Rouyn-Pelletier Formation.
The study area is composed of broadly coeval extrusive felsic facies with mafic to intermediate extrusive and intrusive facies. Felsic units range from flows with lobate, flow banding and in situ brecciated textures to dominantly sulphide clast-bearing volcaniclastic units with tuff breccia, lapilli
tuff and lesser tuff facies. Rocks of the upper portion of the Rouyn-Pelletier Formation and the Horne Block are of similar age and show similarities in volcanic facies. However, there are subtle but significant geochemical differences that suggest that it may not be possible to directly correlate
their stratigraphy. The uppermost Rouyn-Pelletier Formation could represent a distal, poorly mineralized equivalent to the Horne West or Horne 5 zones, or it could be an unrelated succession.
Stratigraphic setting of the LZ5 and Ellison mineralized zones, LaRonde Zone 5 project, Doyon-Bousquet-LaRonde mining camp, Abitibi, Quebec
Authors: Boily-Auclair É , Mercier-Langevin P , Ross P -S , Pitre D
Published: June 2020

The LaRonde Zone 5 (LZ5) project and the neighbouring mineralized zones of the Ellison property are part of the Doyon-Bousquet-LaRonde mining camp in the southern part of the Abitibi greenstone belt. The mineralized zones of the LZ5 (zones 4, 4.1, and 5) and the
Ellison property (zones A and B) are hosted in the Bousquet Formation of the Blake River Group. The host rocks are steeply south-dipping (80-90°) and south-facing, mafic to felsic volcanic and volcaniclastic units. The synvolcanic gold mineralization consists of deformed discordant networks of
millimetre to centimetre thick pyrite±pyrrhotite±chalcopyrite veinlets (10-20 vol.%) and, to a lesser extent, very finely disseminated pyrite (1 vol.%) in altered volcanic and volcaniclastic rocks. Prior to this study, the LZ5 and Ellison mineralized zones were interpreted to be
hosted in the Bousquet heterogeneous unit (Unit 4.4) in the uppermost part of the lower member of the Bousquet Formation. The current study shows that the mineralized zones are located higher in the stratigraphic sequence, i.e., in highly deformed and altered mafic to felsic volcanic and
volcaniclastic units (tuff and lapilli tuff) at the base of the upper member of the Bousquet Formation. Consequently, the LZ5 mineralization, which is considered one of the oldest in the camp, coincides in time and space with a shift in the magmatic evolution of the Bousquet Formation from
dominantly tholeiitic-transitional mafic-intermediate (lower member) to dominantly transitional-calc-alkaline intermediate-felsic (upper member). The revised position of the LZ5 ore zones to slightly higher in the stratigraphic sequence substantiates the camp-wide association between Au
(±Cu-Zn-Ag) mineralization and intermediate to felsic transitional to calc-alkaline magmatism and further indicates that hydrothermal and petrogenetic processes are linked in major synvolcanic Au deposits in the Archean.
The B26 Cu-Zn-Ag-Au project, Brouillan volcanic complex, Abitibi greenstone belt, part 2: hydrothermal alteration and mineralization
Authors: Fayard Q , Mercier-Langevin P , Daigneault R , Perreault S , Wodicka N
Published: June 2020

The B26 project is located in the northern Abitibi greenstone belt a few kilometres south of the past-producing Zn-Cu-Ag-Au Selbaie mine. It consists of a transposed Au-rich chalcopyrite stringer zone (Copper zone) overlain by concordant Ag-rich Zn-(Pb) sulphide
lenses (Main Zinc zone) and disseminated to discordant sulphide vein- and veinlet-rich zones (Upper Zinc zone). The footwall rocks are affected by a wide and intense semi-conformable alteration halo mainly composed of sericite, chlorite, and quartz assemblages. Fe-Mn carbonate and quartz are common
as gangue minerals in the sulphide lenses. The hanging-wall rocks are affected by a proximal K-feldspar-quartz and a more distal albite alteration with Fe-(Mn)-carbonate veins and replacement zones. The mineralized zones and host rocks have undergone major shortening during the main phase of
regional deformation, which is responsible for transposition of the Cu-rich footwall stringers, flattening and stretching of the concordant semi-massive to massive sulphide zones, and local remobilization of precious metal-bearing phases into the south-dipping foliation and along the associated
southwest-plunging stretching lineation.
Gold is directly associated with Cu, and also with Bi, Se, and Sn in the Copper zone as native gold, and Au-rich electrum with native Bi, bismuthinite, laitakarite, ikunolite, stannite, and cassiterite. Silver is present in the Main and Upper Zinc zones as freibergite, native silver, allargentum,
acanthite, and pyrargyrite. Deposit-scale metal distribution and primary sulphide assemblages indicate that precious metals introduction was primary, although later local (metre-scale) remobilization occurred in response to deformation and metamorphism. Copper and Zn are decoupled at B26 and result
from a strong vertical zonation in the system, suggesting an evolving geological environment with potentially a gradually shallowing seawater level. Shallow-water to subaerial conditions have been documented at the nearby Selbaie deposit, where they are considered responsible for the
epithermal-style characteristics of the ore.
Geological setting and gold mineralization associated with the Sunday Lake and Lower Detour deformation zones, northwestern Abitibi greenstone belt, Ontario and Quebec
Authors: Castonguay S , Dubé B , Wodicka N , Mercier-Langevin P
Published: June 2020

The Detour Lake gold mine (~25 Moz or 775 t Au) and Lower Detour zones (e.g. Zone 58N; 0.53 Moz or 16.6 t Au) are located in the northwestern part of the Abitibi greenstone belt in Ontario. They are spatially associated with the Sunday Lake and Lower Detour
deformation zones, which extend eastward into Quebec where they host other auriferous zones (e.g. Vortex and Martiniere-Bug Lake deposits). Gold is associated with quartz-carbonate-pyrite-pyrrhotite±tourmaline veins and/or disseminated to very locally semi-massive sulphides in hydrothermally
altered wall rocks. These structurally controlled auriferous zones are hosted in tholeiitic and calc-alkaline volcanic rocks of the 2734 to 2724 Ma Deloro assemblage and in ca. 2694 Ma subalkaline to locally alkaline porphyritic intrusive rocks near faulted contacts with the <2.70 Ga
Caopatina clastic sedimentary assemblage. Panels or fault-bounded basin remnants of strained Timiskaming-like polymictic conglomerate locally delineate the regional-scale deformation zones and yield maximum depositional ages of between 2706 and 2692 Ma. These relationships are reminiscent of the
prolific southern Abitibi greenstone belt in the Timmins-Porcupine and Val-d'Or gold districts. The revised regional geological setting, coupled with documentation of the key characteristics of gold deposits and their hydrothermally altered host rocks, provide a geological framework for improved
mineral exploration strategies in a poorly exposed, but prospective region that includes the giant Detour Lake gold mine.
Bottom-up mineral exploration: ore-element upgrading in the upper mantle and tools for its discovery
Authors: Lawley C J M , Kjarsgaard B A
Published: June 2020

Mineral exploration targeting typically focuses on the critical pathways and depositional traps of ore systems. The role of pre-enriched source regions on ore deposit genesis is unclear, particularly for systems that involve significant transport of ore
components (e.g. Au). Because Au is suggested to be derived from the mid- to lower-crust and/or upper mantle at orogenic deposits, it is not surprising that the deepest and most inaccessible parts of this ore system is also the least studied and understood. Herein we address that knowledge gap by
studying the upper mantle directly, using examples of young ophiolitic mantle (Atlin, British Columbia) and ancient cratonic mantle (Superior craton, Ontario; Slave craton, Nunavut). Project results demonstrate two dominant mechanisms for Au upgrading in the lithospheric mantle: (1) base metal
sulphide precipitated during melt:rock reactions between peridotitic residues and asthenospheric melts, and (2) hydrous, fluid-inclusions trapped after release from subducting slabs. The remelting of such pre-enriched metasomatized mantle has been previously proposed as a viable source for a variety
of ore systems (e.g. mafic to ultramafic rock-hosted platinum-group element deposits). Mapping the architecture of these deep lithospheric metasomatized mantle domains and their association with rising asthenospheric melts is of significant interest for mineral exploration. New geochemical methods
and data processing completed as part of the current study, coupled with advances in geophysical imaging, provide additional tools for mapping these pre-enriched lithospheric mantle domains at depth.
Vein-hosted gold mineralization in the Wilding Lake area, central Newfoundland: structural geology and vein evolution
Authors: Honsberger I W , Bleeker W , Sandeman H A
I , Evans D T W , Kamo S L
Published: June 2020

Crustal-scale fault zones in central Newfoundland are being recognized as significant gold-mineralized structures. In particular, a northeast-trending structural corridor in the eastern Dunnage Zone (Exploits subzone), delineated by the Rogerson Lake
Conglomerate, contains highly prospective vein-hosted gold deposits. Such mineralized vein systems, exposed near Valentine Lake (Marathon Gold Corp.) and Wilding Lake (Antler Gold Inc.), are products of progressive Paleozoic deformation and fluid-pressure cycling along crustal-scale faults that cut
the Late Silurian to Early Devonian Rogerson Lake Conglomerate and underlying Neoproterozoic basement rocks. Well exposed, gold-bearing quartz-vein systems in the Wilding Lake area reveal a kinematic history that involved a main phase of reverse sinistral shearing and subsequent transient phases of
horizontal extension, oblique compression, and, at least locally, components of late dextral strike-slip. High-grade gold mineralization is associated with siderite-ankerite-sericite alteration of the host rocks, structurally controlled quartz-vein emplacement, and supergene alteration of pyrite and
chalcopyrite. Gold-bearing vein sets contain quartz, pyrite, chalcopyrite, tourmaline, native gold, Ag-poor electrum, bismuth-silver-gold tellurides, rutile, and secondary goethite, malachite, and acanthite. Prospective gold exploration targets in the Wilding Lake area are Late Silurian feldspar
porphyry and felsic volcanic rocks overlying the Rogerson Lake Conglomerate, as well as, rheologically favourable Neoproterozoic basement granitoids that may provide a setting similar to that at Valentine Lake.
The emerging Paleozoic gold district of central Newfoundland: new insights on structural controls and tectonic drivers of gold mineralization and preservation
Authors: Honsberger I W , Bleeker W , Kamo S
L , Sandeman H A I , Evans D T
W
Published: June 2020

The formation and preservation of orogenic gold deposits are associated with a predictable set of magmatic, structural, and tectonic processes that have recurred throughout Earth's history. In world-class Archean gold districts, such as in the Superior Province
of the Canadian Shield and the Yilgarn Craton of the West Australian Shield, the main gold-mineralized fault zones are characterized by early imbrication, lithospheric extension, synorogenic magmatism and sedimentation, thick-skinned re-imbrication, and late-stage strike-slip. Such an evolution
results in the occurrence of gold-mineralized, upper crustal sequences of synorogenic magmatic and sedimentary rocks above terranes of granitoid rocks and/or older poly-deformed volcanic rocks. Targeted exploration for orogenic gold mineralization relies on remnant panels of synorogenic rocks (e.g.
polymict conglomerate and bimodal magmatic rocks) as first-order field indicators of structurally controlled gold preservation along prospective crustal-scale fault zones.
Paleozoic crustal-scale fault zones in central Newfoundland have been known to host significant gold mineralization and recent major discoveries (e.g. Valentine Lake gold deposit) and associated exploration suggest the emergence of a new district centred on the footwall rocks of the Victoria Lake
shear zone. Fieldwork, combined with structural analysis and high-precision U-Pb geochronology throughout central Newfoundland, demonstrates that the structurally controlled Paleozoic gold district is remarkably similar to the much older Archean Abitibi gold district in scale, geological setting,
structural architecture, synorogenic magmatism and sedimentation, style of mineralization, tectonic evolution, and process rates. In central Newfoundland, orogenic gold occurs within footwall blocks of an overall northwest-directed fault system that juxtaposed and deformed Neoproterozoic basement
granitoid rocks and Late Silurian to Early Devonian synorogenic rocks during the Acadian Orogeny. Preliminary high-precision U-Pb zircon and rutile geochronology demonstrates that the key tectonic interval driving gold mineralization and synorogenic sedimentation and magmatism, including
syenogranite and monzonite intrusions, occurred between 424 and 407 Ma, approximately the same relative time interval (15-20 million years) as the Abitibi greenstone belt. The similarities between the gold systems of central Newfoundland and the Abitibi imply that a common predictable set of
structural and tectonic processes throughout Earth's history, and thus independent of time, have led to the deposition and preservation of orogenic gold mineralization.
Neoproterozoic-hosted Carlin-type mineralization in central Yukon, part 2: mineralization
Authors: Pinet N , Sack P , Mercier-Langevin P , Davis W
J , Lavoie D , Ardakani O
H , Komaromi B A , Dubé B , Cline J
S , Petts D C , Jautzy J , Jackson S E , Percival J B , Savard M
M , Brake V I
Published: June 2020

Gold-rich zones in the Nadaleen trend (central Yukon) exhibit several characteristics consistent with Carlin-type mineralization: 1) alteration zones with partial to complete decalcification of mineralized intervals and very fine-grained quartz associated with
silicification; 2) the association of gold with certain pathfinder elements (Tl, As, Hg, and Sb) and minerals (realgar, orpiment, and fluorite); 3) the low base metal and Ag content of the mineralized intervals; and 4) the 'invisible' nature of gold, which occurs as rims of Au-bearing arsenian
pyrite on pre-ore pyrite and/or as sub-micrometre particles. Mineralization styles vary significantly between intervals and even within an interval, attesting to the 'passive' or 'opportunistic' nature of the mineralizing fluids that exploited a variety of porous and permeable pathways regardless of
their sedimentary and/or tectonic origin. Alternating finely laminated limestone and siltstone (Conrad zone) and floatstone intervals (Conrad, Sunrise, and Osiris zones) are the most favourable sedimentary units. Pre-mineralization fractures acted as feeders for selective bed replacement and
pre-mineralization vein networks were preferentially dissolved by early acidic fluids and channelized later by gold-bearing fluids. With ongoing research, we hope to better constrain the occurrence of gold at the micron scale, the geochemical variations due to alteration, the temperature of the
mineralizing fluids, and the timing of the gold mineralization.