bluuebunny/crossref_metadata_2025 huggingface dataset:
A Novel Gaze Tracking Method Based on the Generation of Virtual Calibration Points
Authors: Lee Ji , Heo Hwan , Park Kang
Published: August 2013

Most conventional gaze-tracking systems require that users look at many points during the initial calibration stage, which is inconvenient for them. To avoid this requirement, we propose a new gaze-tracking method with four important characteristics. First, our gaze-tracking system uses a large screen located at a distance from the user, who wears a lightweight device. Second, our system requires that users look at only four calibration points during the initial calibration stage, during which four pupil centers are noted. Third, five additional points (virtual pupil centers) are generated with a multilayer perceptron using the four actual points (detected pupil centers) as inputs. Fourth, when a user gazes at a large screen, the shape defined by the positions of the four pupil centers is a distorted quadrangle because of the nonlinear movement of the human eyeball. The gaze-detection accuracy is reduced if we map the pupil movement area onto the screen area using a single transform function. We overcame this problem by calculating the gaze position based on multi-geometric transforms using the five virtual points and the four actual points. Experiment results show that the accuracy of the proposed method is better than that of other methods.
Dearfield Dream Project: Developing an Interdisciplinary Historical/Cultural Research Network
Authors: Brunswig Robert , Junne George , Bowser Gillian , Renfrew Erin , Dickmann Ellyn , Purnell Amanda , Brown Mark
Published: August 2013

The Dearfield Dream Project is a collaborative research initiative to conduct historical, cultural, archaeological, and environmental studies on the early 20th Century African-American colony site of Dearfield, Colorado, USA. Because the breadth and significance of the Dearfield Project requires an interdisciplinary research team, a network of research collaborators has been assembled. This research network seeks to discover, preserve, and disseminate knowledge of the site and its surrounding farmsteads’ economic, social, political, and environmental history for better understanding and interpretation of its contributions to Colorado and U.S. history. Herein, we detail progress that has been made on this important historical/cultural research project. Further, we outline the future of the Dearfield research network along with our current and anticipated subjects of inquiry.
Gallium-containing polymer brush film as efficient supported Lewis acid catalyst in a glass microreactor
Authors: Munirathinam Rajesh , Ricciardi Roberto , Egberink Richard J M , Huskens Jurriaan , Holtkamp Michael , Wormeester Herbert , Karst Uwe , Verboom Willem
Published: August 2013

Polystyrene sulfonate polymer brushes, grown on the interior of the microchannels in a microreactor, have been used for the anchoring of gallium as a Lewis acid catalyst. Initially, gallium-containing polymer brushes were grown on a flat silicon oxide surface and were characterized by FTIR, ellipsometry, and X-ray photoelectron spectroscopy (XPS). XPS revealed the presence of one gallium per 2–3 styrene sulfonate groups of the polymer brushes. The catalytic activity of the Lewis acid-functionalized brushes in a microreactor was demonstrated for the dehydration of oximes, using cinnamaldehyde oxime as a model substrate, and for the formation of oxazoles by ring closure of ortho-hydroxy oximes. The catalytic activity of the microreactor could be maintained by periodic reactivation by treatment with GaCl3.
Five-year Favorable Outcome of Patients with Early Rheumatoid Arthritis in the 2000s: Data from the ESPOIR Cohort
Authors: Combe Bernard , Rincheval Nathalie , Benessiano Joelle , Berenbaum Francis , Cantagrel Alain , Daurès Jean-Pierre , Dougados Maxime , Fardellone Patrice , Fautrel Bruno , Flipo Rene M. , Goupille Philippe , Guillemin Francis , Le Loët Xavier , Logeart Isabelle , Mariette Xavier , Meyer Olivier , Ravaud Philippe , Saraux Alain , Schaeverbeke Thierry , Sibilia Jean
Published: August 2013

Objective.

To report the 5-year outcome of a large prospective cohort of patients with very early rheumatoid arthritis (RA), and to identify factors predictive of outcome.

Methods.

Patients were recruited if they had early arthritis of < 6 months’ duration, had a high probability of developing RA, and had never been prescribed disease-modifying antirheumatic drugs (DMARD) or steroids. Logistic regression analysis was used to determine factors that predict outcome.

Results.

We included 813 patients from December 2002 to April 2005. Age was 48.1 ± 12.6 years, delay before referral 103.1 ± 52.4 days, 28-joint Disease Activity Score (DAS28) 5.1 ± 1.3, Health Assessment Questionnaire (HAQ) 1.0 ± 0.7; 45.8% and 38.7% had rheumatoid factor or antibodies to cyclic citrullinated peptide (anti-CCP), respectively; 22% had hand or foot erosions; 78.5% fulfilled the American College of Rheumatology/European League Against Rheumatism criteria for RA at baseline and 93.8% during followup. At 5 years, 573 patients were evaluated. The outcome was mild for most patients: disease activity (median DAS28 = 2.5) and HAQ disability (median 0.3) were well controlled over time; 50.6% achieved DAS28 remission and 64.7% low disease activity. Radiographic progression was low (2.9 Sharp unit/year) and only a few patients required joint surgery. Nevertheless, some patients developed new comorbidities. During the 5 years, 82.7% of patients had received at least 1 DMARD (methotrexate, 65.9%), 18.3% a biological DMARD, and about 60% prednisone at least once. Anti-CCP was the best predictor of remaining in the cohort for 5 years, of prescription of synthetic or biologic DMARD, and of radiographic progression.

Conclusion.

The 5-year outcome of an early RA cohort in the 2000s was described. Anti-CCP was a robust predictor of outcome. The generally good 5-year outcome could be related to early referral and early effective treatment, key processes in the management of early RA in daily practice.
Telling the Story of Role Conflict Among Black Nurses and Black Nursing Students: A Literature Review
Authors: Robinson Ora V.
Published: August 2013

Racism continues to affect minority nursing students and nurses in professional roles. A selective review of the literature published from 1992 to 2011 was conducted using the Cumulative Index of Literature in Nursing and Allied Health, ScienceDirect, and EBSCOhost. Keywords used included
racism within nursing
,
minority nurses and role conflict
,
cultural diversity within nursing
,
racism
, and
diversity
. The purpose of this review is to describe Black nurses’ and Black nursing students’ experiences of role conflict as an outcome of perceived racism within the nursing profession to gain an understanding of factors that contribute to perceived racism and role conflict. Noblit’s and Hare’s framework for metasynthesis of the data was used to identify and synthesize key concepts. The role perspectives of Hardy and Conway guided the review to develop a conceptual framework for minority role conflict and the nursing implications discussed herein. [
J Nurs Educ
. 2013;52(9):517–524.]
Creating Innovative Programs for the Future
Authors: Allen Patricia E. , Keough Vicki A. , Armstrong Myrna L.
Published: August 2013

Although several major national mandates advocate for a better educated workforce, this push comes at a time when the competition for faculty, financial resources, advanced technology, and students remains strong. If nurse educators are seriously considering creating a new nurse program at their school, some key points are essential during the development stage. Using the innovation frameworks from the Institute of Healthcare Improvement, from the global design firm IDEO, and from Gladwell’s
The Tipping Point: How Little Things Can Make a Big Difference
, this article examines the informal, formal, internal, and external work needed during program conceptualization, initial program exploration, resource infrastructure, support, and evaluation for an effective and innovative plan. [
J Nurs Educ.
2013;52(9):486–491.]
An Adaptation Model for Personalized E-Assessments
Authors: Saul Christian , Wuttke Heinz-Dietrich
Published: August 2013

Over the last decade, a large number of e-assessment system and tools were developed. However, they all provide assessments that are characterized by a static structure (ordered sequence of questions, predefined start and ending, etc.). This approach does not consider students individual knowledge or characteristics. Instead, each student has to answer the same questions. The work presented in this paper focuses on a personalized e-assessment system (askMe!) that not only identifies, but also supports and even compensates deficits in studentsâ?? individual learning by considering studentsâ?? strengths and preferences. In this paper, the core, the adaptation model of the system is presented that defines what can be adapted, as well as when and how it is to be adapted.
Distributed Personal Learning Environments: Towards a Suitable Architecture
Authors: Manso-Vázquez Mario , Llamas-Nistal Martín
Published: August 2013

Personal Learning Environment is a reference to future learning. In this paper we present a multi-level analysis of the options and requirements in the universe of PLE, analyzing the content management system as the main tool of the learning environment. There are two principal models: distributed applications and mashups. Both have advantages and disadvantages, and they also share a big issue: lack of inter-application communication. We are trying to find a solution to this problem presenting an architecture for distributed applications model, so that transparency to the uses will be maintained.
Using Games-based Learning: How it Influences the Learning Experience and Outcomes of Primary School Children
Authors: Abdul Razak Aishah , Connolly Thomas M
Published: August 2013

Under the new Curriculum for Excellence (CfE), teachers at schools across Scotland are encouraged to use constructivist learning approaches that promote challenge and enjoyment in learning. One of them is through the use of games-based learning (GBL) technologies in classroom education, where the students are not only expected to learn by playing computer games, but also creating computer games. Two teacher surveys were conducted across primary schools in two separate regions in the West of Scotland to identify how GBL is being implemented within primary schools. The results showed that the use of GBL, especially the game making approach, was very limited. Following the surveys, several school-based field works were conducted to identify and compare the learning experience and outcomes from the teachersâ?? and studentsâ?? perspectives when using GBL and non-GBL (the traditional) approaches. This paper summarizes the result of one case study conducted at one primary school in Scotland. The participants were the teacher and her students in Primary 4 level. They were exposed to learning times tables using two different approaches, one using computer games and the other one without the use of computer games. The findings have shown that the learning outcome is slightly better when using computer games. However, in terms of the learning experience, the teacherâ??s pedagogical style has a great influence on the studentsâ?? preferences and enjoyment in learning for both approaches. Overall, the findings have strengthened the fact that using computer games does not eliminate the role of the teacher. To maximize the potential of a GBL approach, more training and exposure to GBL are needed to help the teachers increase their understanding and capacity in using this approach. With proper support from the teacher, GBL can make learning more engaging, provide better learning outcomes and make the process of learning less tedious.
Le CECRL : un outil pour construire une politique des langues ? Retour d’expérience sur l’évaluation et la certification à l’UPMC (2009/2011)
Authors: Brudermann Cédric , Demaison Christine , Benderdouche Faouzia
Published: August 2013

Dans le cadre d’une nouvelle politique au sein du Département des Langues de l’Université Pierre et Marie Curie (Paris), des enseignants-chercheurs ont cherché à créer un dispositif cohérent prenant en compte contexte, besoins et objectifs de certification en langues. Pour ce faire, un triple projet a été mené : création d’un test de positionnement, adossement des enseignements au CECRL et certification par le CLES. L’article se propose de revenir sur les trois dernières années de cette mise en œuvre.Nous présenterons d’abord les conditions de création du test de positionnement de l’UPMC corrélé au CECRL, ses objectifs, ainsi que son mode de fonctionnement. Dans un deuxième temps, nous observerons les impulsions pédagogiques liées à la création du test et à l’exigence de certification. Nous analyserons ensuite les résultats du dispositif en liaison avec la certification par le CLES. Enfin, nous observerons les conditions de l’évolution de ce dispositif.
Les certifications en Espagnol Langue Étrangère sur le marché français
Authors: Meléndez Quero Carlos
Published: August 2013

Dans un contexte difficile, marqué par les contradictions des discours officiels exigeant des lauréats aux concours de recrutement des personnels enseignants des premier et second degrés l’obtention d’un certificat de langue étrangère de niveau B2 du Cadre européen commun de référence pour les langues, cet article présente une comparaison des quatre certifications acceptées actuellement par le Ministère de l’Éducation Nationale pour attester de la compétence en langue espagnole (CLES, DCL, BULATS et DELE). Dans ce but, suivant les critères d’évaluation de l’utilité d’un test de Bachman et Palmer (1996) et fondé sur notre expérience professionnelle dans le domaine de l’évaluation des certifications d’espagnol langue étrangère, ce travail analyse plusieurs critères (fiabilité, validité, authenticité, interactivité, impact et faisabilité) pouvant orienter le choix des enseignants et des candidats d’espagnol quant au certificat, diplôme ou test de langue à adopter.
Les langues de spécialité au cœur des politiques linguistiques universitaires européennes
Authors: Barrault-Méthy Anne-Marie
Published: August 2013

Dans le domaine de l’enseignement-apprentissage des langues de spécialité (LSp) en Europe, le financement de la recherche et de dispositifs pédagogiques en ligne ou en blended learning (apprentissage mixte) se fait de façon croissante en répondant à des appels à projet (Bertin 2011). C’est pourquoi il est crucial, pour l’enseignant de LSp qui souhaite faire financer ses activités, de connaître les attentes des tutelles. Notre travail vise d’abord à présenter ces attentes en suivant les catégories de la théorie du management linguistique de Spolsky (2009) que sont les organisations supranationales, l’État, les régions, etc. Ensuite, l’analyse qualitative d’un corpus en anglais constitué de recommandations de politique linguistique, compendia de projets européens et autres formes discursives permet de décrire précisément la langue des projets liés aux LSp. Cette langue des projets liés aux langues de spécialité constitue une métalangue de spécialité européenne.
Validation d’acquis en français sur objectif universitaire (FOU) : quelques pratiques actuelles et propositions à considérer au regard du CECRL
Authors: Gettliffe Nathalie
Published: August 2013

À l’heure de la mise en place d’une politique des langues commune pour le secteur Langues pour spécialistes d’autres disciplines (LANSAD) de l’Université de Strasbourg, la question des certifications est au centre des préoccupations. Quel niveau exiger en fin de parcours universitaire, et comment valider des niveaux de compétences en langue sur objectifs spécifiques tout en s’appuyant sur les principes du Cadre européen commun de référence pour les langues (CECRL) ?Notre regard se portera sur les mobilités entrantes et les dispositifs accompagnant les étudiants étrangers à l’Université de Strasbourg. Nous présenterons les résultats d’entretiens avec des intervenants en FOU concernant le contenu des parcours qu’ils proposent dans différentes disciplines et les validations s’appuyant sur des descripteurs du CECRL qui y sont associées.
Que peut apporter l’analyse d’interactions orales à l’enseignement-apprentissage des langues sur objectifs spécifiques ?
Authors: Mercelot Gérard
Published: August 2013

À partir des résultats d’une analyse de transcriptions de négociations authentiques ou de simulations réalistes provenant du domaine technico-commercial et menées en français entre professionnels français ou entre français et allemands, nous nous interrogerons sur la structure des discours de spécialité oraux et sur l’organisation des interactions ainsi que sur l’interculturel qui sous-tend ce type de rencontres. Nous établirons l’hypothèse que le langagier et l’interculturel ne sont pas autonomes, mais au contraire interagissent à tous les niveaux. Leur articulation dépend des règles de communication de chaque culture ainsi que de la fonction de chaque interactant et de son interprétation de celle-ci. L’enseignement-apprentissage d’une langue sur objectifs spécifiques devrait donc tenir compte de la dimension des rôles professionnels et de la définition culturelle de leurs droits et devoirs.
Langue de spécialité et TICE au cœur d’un projet pédagogique international
Authors: Broadbridge Judith , Charriau Veronique
Published: August 2013

Dans le cadre d’un projet tuteuré, dix étudiants d’IUT ont correspondu pendant six mois par mél, Skype et chat avec des étudiants irlandais et britanniques. Ces correspondances avaient pour but, outre la pratique de la langue, de mettre des compétences techniques et communicationnelles au service de la production de travaux communs (exposé technique, blog, site Web).Si l’utilisation des technologies de l’information et de la communication pour l’enseignement (TICE) stimule les étudiants, très à l’aise avec ces moyens de communication, ce type de projet est-il réellement productif en termes linguistiques ? Quels sont les apports pour la langue de spécialité ? Quels objectifs pédagogiques lui fixer ? Comment concilier les différences des systèmes éducatifs ? Quelles sont les difficultés pratiques de mise en oeuvre d’un tel projet ? Comment l’évaluer ? Nous nous proposons, par le biais de cette étude de cas, de partager notre expérience et d’apporter quelques éléments de réponse à ces questions.
L’éthique dans l’enseignement-apprentissage des langues de spécialité : le cas de l’espagnol en Économie
Authors: Iglesias-Philippot Yannick
Published: August 2013

Dans quelle mesure l’enseignement-apprentissage des langues de spécialité contribue-t-il à développer la compétence éthique dans la formation des étudiants LANSAD ? Existe-t-il une spécificité de l’enseignement LANSAD et, si oui, est-il possible d’en définir les principaux objectifs et compétences ? Je serai ainsi amenée à évoquer certaines caractéristiques fondamentales de la langue de spécialité, comme l’acquisition des compétences transversales et la professionnalisation, l’objectif final étant la formation d’un « acteur social ». J’essayerai ensuite de démontrer que la compétence éthique occupe une place centrale en Didactique des Langues-Cultures, car elle oriente et détermine l’élaboration du cursus en LANSAD et j’illustrerai à l’aide d’exemples concrets en espagnol de l’économie comment mettre en œuvre l’acquisition de cette compétence tout en soulignant sa complexité. En effet, la formation à la compétence éthique va de pair avec la formation d’un « acteur social » et renvoie aussi à l’autonomisation de l’étudiant, à la responsabilisation de l’étudiant et de l’enseignant, à la formation à la compétence informationnelle ou encore à la dimension collective et collaborative du projet pédagogique.
Specificity of gated neighbourhoods in the Bielany district (Warsaw)
Authors: Górczyńska Magdalena
Published: August 2013

The article investigates the phenomenon of gated and guarded neighbourhoods in the Bielany district (Warsaw) after the demise of the socialist regime in 1989 in Poland. The number of secured housing estates grows respectively among newly built neighbourhoods and older housing stock, the latter often being fenced and therefore also detached from the surrounding. Large offerings of gated estates (from luxurious apartments to rather standard blocks of flats) have made living in guarded neighbourhoods a standard in Bielany. In spite of the diversity of the organisational structures and security modes of gated neighbourhoods, they rarely offer additional functions to their inhabitants. Thus, the security functions seem to be the most basic feature of gated estates in Bielany. However, at the same time, a sense of insecurity triggers the motivation for living within gated estates but does not fully explain this phenomenon. Further research is planned in order to assess supply driven forces and the impact of increased offerings of gated estates on the housing choices of inhabitants in Warsaw.
Real estate market and urban transformations: spatio-temporal analysis of house price increase in the centre of Marseille (1996-2010)
Authors: Boulay Guilhem
Published: August 2013

Over more than ten years, France has experienced a twofold increase of residential housing prices. This was largely fuelled by the credit conditions and a general fear of the future. A strong negative correlation between initial price level and its increase leads to a massive trend of spatial homogenization of the prices. Such a tendency is fairly vigorous in the metropolitan area of Marseille, and particularly in its extremely poor and long devaluated centre, where prices have risen by over 200% since the mid-1990s. This real estate market evolution is emblematic of Neil Smith’s rent gap hypothesis. Yet, a detailed survey of spatial differentials of price increase shows that contiguous central neighbourhoods with similar price levels before the recent tremendous upsurge are affected by appreciably different price rises. Therefore, this unequal price evolution cannot be understood without a clearer analysis on the ‘potential land value’ than provided by Smith’s model. In the context of such housing price increase and uncertainty, prices transmit noisy signals to investors. Thus, State involvement, as in one of the most important operations of urban redevelopment nationwide (Euroméditerranée), appears as a guarantee for investors and also accounts for the spatial differentials of price growth rates.
Strut- and- Tie Model Method for Partial Compression about Prestressed Tendon Constraint Concrete
Authors: Ji Lei , Yin Xin Sheng
Published: August 2013

Prestressed tendon constraint partial compression concrete is a new approach to solve the phenomenon of insufficient bearing capacity in partial compression concrete members .The keystone of Strut-and-tie theory is presented.The development of strut-and-tie model is in-depth analyzed based on the description of the stress distribution in the members , the author considers that this theory can yet be regard as an ideal calculation method in partial compression members which is constrained by prestressed tendon or steel mesh.
Experimental Study on Natural Frequency Variation Regulations of Simply Supported Externally Prestressed Concrete Beams
Authors: Xue Gang , Wang Chong Ge
Published: August 2013

In order to study the relationship between prestress and natural frequencies and the factors of influence natural frequence change, a dynamic test on three simply supported externally prestressed concrete beams of different prestressed level was carried out. The results showed that the eccentricity and arrangement of externally prestressed tendons and the constraints have more influence on natural frequencies than prestress itself. The prestressed effect comes from combined action of the several factors, and the natural frequencies of beams were found to agree well with the prestress. It appears that higher order frequencies have greater increment usually.
Model Test Research on the Concrete Creep and Shrinkage Effects on the Long-Time Deflection of Steel Concrete Composite Beam
Authors: Zhang Shi Bo
Published: August 2013

This paper presents a model test research on long-term deflection of prestressed steel-concrete composite beams caused by creep and shrinkage effects of concrete. The model is designed based on a 20.8m length segment of a service composite beam bridge in Guangzhou. Geometric scale between the model and prototype is 1:8. Long-term deflection of the test model was obtained through 300 days of uninterrupted test. In addition, using the CEB-FIP (1990) criterion, effective modulus of concrete was calculated considering the effect of the concrete creep and shrinkage. Uniform the effective modulus of concrete to the modulus of steel, the value of structures time varying stiffness was calculated with single material theory and the relationship between stiffness and deflection by introducing stiffness adjustment coefficients was established, then the value of deflection changing with time was calculated.
Stress-Induced Magnetic Signals for Structural Health Monitoring of Civil Infrastructures
Authors: Bao Sheng , Lou Hang Fei , Lin Li
Published: August 2013

In this research, the correlations between the magnetic signals and the mechanical behavior of a ferromagnetic steel structure under tensile loads were investigated. The failure mode of the tested steel joint was the buckling of the annular plate. It was observed that during the loading process the piezomagnetic response demonstrated a different behavior compared to the mechanical response. The greater variation of the load-B field curve shows that piezomagnetic signal is a more sensitive indicator of structural failure than the mechanical response. The piezomagnetic effect may be used as a promising method to monitor the failure process of civil infrastructures.
Structural Health Monitoring for Steel Structures
Authors: Wang Xin , Hu Wei Bing
Published: August 2013

The process of implementing a damage identification strategy for aerospace, civil and mechanical engineering infrastructure is referred to as structural health monitoring. Many different types and degrees accidents take place, especially some important collapse accidents, the significance of steel structural health monitoring has been recognized. The introduction begins with a brief research status of steel structural health monitoring in china and the world. The paper analyzes the projects and contents of steel structures monitoring from nine aspects and summarizes the diagnosis methods of steel structural damages which include power fingerprint analysis, the methods of model correction and system identification, neural network methods, genetic algorithm and wavelet analysis, it provides us theoretical guidence. In conclusion, structural health monitoring for steel structures could reduce the impact of such disasters immediately after natural hazards and man-made disasters both economically and socially, thus it is becoming increasingly important.
Crack Survey and Cause Analysis of a Complex in Huatugou of Qaidam Basin
Authors: Zhang Qing , Pu Wan Li
Published: August 2013

Huatugou in Qaidam Basin is a saline soil area with special geological condition, and there has special climatic conditions. The buildings appear serious cracks and inclined in this area. This article uses the investigation and inspection which we collect to analyze the present situation for the buildings. Explain why this situation happened and put forward some treatments.
Nondestructive Testing Method of Vertical Prestressed Finishing Twisted Steel Tension
Authors: Cai Jian Jun , Sun Jia Long , Zhang Feng
Published: August 2013

Based on the dynamic, selecting the vibration shape functions for obtaining the structural frequency, without using the differential operation of the conventional Rayleigh law which improved the calculation accuracy, the three-parameter model was built which include the frequency of the exposed segment, the segment length of the exposed steel reinforcements and anchorage segment increased stiffness coefficient. Meanwhile the validity of the three-parameter model was verified using finite element numerical simulation. The vertical pretensioning force of the box girder webs model was designed at laboratory. The natural frequency of vertical prestressing tendons exposed section was obtained through the high-frequency acceleration sensor which was set up at the top of the exposed section. Relying on experimental test data, the model which had the nonlinear relationship between the effective tensile force and anchorage segment increased stiffness coefficient was established.
Analysis on Defects Location during Rebar Pull-Out Test by Acoustic Emission Technique
Authors: Ouyang Li Jun , Ding Bin , Chen Wei Zhen , Lu Zhou Dao
Published: August 2013

To confirm precision of acoustic emission source localization technique and validate rationality of acoustic emission parameters setting in concrete detection, defects location in pull-out specimens during bond failure were monitored by the method of 3D localization technique. In the monitoring,formation and propagation of cracks calculated by localization algorithm agrees with the real situation. AE parameters proposed in the paper help to identify source location with high accuracy.
Multi-Sensors Based Inclines Measuring System
Authors: Lu Ming Chih , Wang Yu Chen , Tsai Cheng Pei , Wang Wei Yen , Su Shun Feng
Published: August 2013

In this paper, we propose a multi-sensor based incline measuring system. The systems include: g-sensor, e-compass sensor, and image-based incline measuring system install in a same structure, the solar cell system and wireless transmission system (zig-bee) also install in the same structure. The g-sensor and image-based incline measuring system use to measure the incline angle and the micro-vibration, and the e-compass sensor to measure the angle of rotation. The image-based incline measuring system include: a laser projector, a measuring board and a camera, and the system use the characteristic of laser, and the laser projector hanging on structure project a laser beam on the measuring board vertically. The camera captures an image to identify the coordinate of laser spot, and use the coordinate of laser spot to calculate the actual incline angle. The results of incline angle combine two different sensors to increase the accuracy of measurement result.
An Application of Stored Procedures in a GPS-Based Slope Online Monitoring System for Open-Pit Mine
Authors: Liu Zhen Shan , Gao Ren Qiang , Chen Ming , Yang Hai Sheng , Wang Qi , Zhou Yang Shen
Published: August 2013

As for implementing functions in slope online monitoring system by exploiting data acquired via GPS, good and high efficient stored procedures are essential. More importantly, a good designed stored procedure can simultaneously provide decision services for multiple users. By integrating the Client/Server and Browser/Server subsystems, this system explores a much convenient and automatic way to manages the mining area. 18 database tables are designed to support the database operation, such as the GPSSTATICRESULT table that storeds accurate static data and the STATIONINFO table that records all equipment information. Moreover, the design and implementation of stored procedures is analysed to flexibly support complicated system functions. The results indicate that system working with stored procedures has high performance on applications open-pit mine. The results not only confirmed the applicability and effectiveness of stored procedures, but also revealed system with stored procedures has advantages of conveniently managing mining data, timely sending real-time monitoring information, optimizing security of mine production and making auxiliary decision for enterprise.
A Study on High-Rise Building Structure Selections Using Artificial Intelligence Methods
Authors: Ma Ling Yong , Gu Bing Xin , Liu Gong Liang
Published: August 2013

With the increasing height of building, high-rise building structure selection becomes more and more important. This paper presents the application of genetic neural network method to study high-rise building structure selection and uses the MATLAB neural network toolbox with a combination of genetic algorithm toolbox to develop a genetic neural network expert system for high-rise building structure selection to make the selection process simple.
Comparison and Analysis of the Artificial Boundary in Homogeneous Elastic Semi-Infinite Foundation
Authors: Qiang Pei , Wu Shuang
Published: August 2013

In order to simulate dynamic response of homogeneous elastic semi-infinite foundation; established 2 D and 3 D model of different artificial boundaries in large finite element software, for surface source problem and inner source problem as example, comparison and analysis of dynamic response of different artificial boundaries; viscous-spring artificial boundary should be adopted in dynamic calculation of homogeneous elastic semi-infinite foundation.
Construction Monitoring Technology Research on Large-Span V Structure Tied Arch Bridge
Authors: Yin Ting , Zhang Wei , Zhao Yan Bo , Sun Xiao Long
Published: August 2013

Large-span V structure tied arch bridge structure system is complex. In order to make the actual state of the bridge into the ideal state of maximum close to the design, we must make real-time monitoring in the key parts of the structure, and adjust to the design of the data by analysis calculated, to ensure the safety and reliability of arch bridge in the course of construction and into stress after the completed bridge. Combined with the construction monitoring of the main Xinglong Bridge on Si River, this paper introduces the main bridge construction process measurement a preliminary study on the large span V configuration basket tied arch bridge construction monitoring technology. Based on the construction monitoring of Xinglong Bridge on Si River, this paper introduces the main contents and methods of monitoring point location, monitoring control of construction process, and discussed the construction monitoring technology of long-span X-style tied arch bridge V structure.
The Study on Theoretical and Experimental Hysteresis of GLQW-1 Frictional Damper
Authors: Ding Bo Yang , Cao Liang , Dang Gai Hong , Xu Ting
Published: August 2013

Based on the building application, the Pall frictional damper is innovated. The relevant mechanical model is shown in this paper. According to this model the scientist and his colleague obtained theoretical hysteresis curve by Dichotomy Method and compared it with results that is from the semi-real-scale test. In the end of paper the authors give some example for the GLQW-1 frictional dampers.
Effect of Backing Materials on the Performance of Cement-Based Piezoelectric Ultrasonic Sensors
Authors: Xie Xin Chun , Li Mi Mi , Xu Dong Yu , Hou Peng Kun , Huang Shi Feng
Published: August 2013

In order to increase the sensitivity, frequency bandwidth and longitudinal resolution of the 1-3 cement-based piezoelectric ultrasonic sensor, different metal powder/epoxy resin composite materials were used to make backing layer, and the performances of sensors were evaluated and compared. The results indicated that the increase of the sensitivity and the frequency bandwidth, as well as a decrease of the pulse wave number can be observed when the backing materials of metal powder/epoxy resin composite materials were added to the sensor. A 42%-increase of the maximum peak-to-peak value of the echo pulse response, a 52%-reduction of the ring down time and a 200%-increase of the bandwidth can be achieved by using the backing material.
Experiment Study and Nonlinear Analysis of a New Skip-Floor Staggered Shear Wall Structure for High-Rise Buildings
Authors: Liu Jian Xin , Wang Hong Nan , Li Pei , Zhu Mei Chun
Published: August 2013

A new tall building structure is presented -- skip-floor staggered shear wall structure. According to the result of nonlinear analysis and experiment study, this new structural system has good economic benefits and better structural behavior. In order to study its spatial nonlinear properties, based on a 3D nonlinear FEM analysis model, the 3D seismic nonlinear analysis is provided by considering both spatial effect and influence of slab and connecting beam. It shows, compared with traditional coupled shear wall structure, the skip-floor staggered shear wall structure has superiority in many respects, such as providing bigger space and lateral stiffness, reducing seismic force, etc. Therefore, this new structural system has wide applications.
Experimental Study of Infrared Thermography for Detecting Internal Defect of Mortar Finishing Layer
Authors: Feng Li Qiang , Wang Huan Xiang , Yan Da Wei , Liu Ji Lin
Published: August 2013

Internal defect of mortar finishing layer was detected using thermal infrared imager. The main object was to study variable characteristics of surface temperature on internal defect of mortar finishing layer heated by external heating source. The distribution and variation law of surface temperature on mortar finishing with time and space were obtained,and the influences of thickness,area and embedded depth of internal defect on image quality were analyzed. The test results show that the thicker, bigger and shallower internal defect is more easily detected. The surface mortar temperatures of internal defect is maximum temperature point of approximate symmetry along the width direction. Based on the test results, the prediction model of dimension of internal defect was established through statistical analysis technique, which can provide a reference for the related follow-up study and practical project application.
The Seismic Strengthening of a Middle School Teaching Building
Authors: Yue Qing Xia
Published: August 2013

The seismic strengthening of the teaching buildings is complex because of the difference of the seismic precautionary intensity of the buildings. This paper takes a middle school teaching building, a frame structure, as an example. The building designed without considering of the seismic precaution, and the integrity is poor and the first and second natural mode of vibration is mainly torsion deformation, which is disadvantage to the seismic performance of the building. As to this middle school teaching building, some new beams were added to the original system to strengthening the integrity and some new shear walls are added at the four external corners. After strengthening, the calculation results show that the seismic performance is increased greatly and the first and second natural mode of vibration are mainly translation deformation. Only small amount of the strengthening works are needed for the columns and beams.
The Application of the Technology in Reinforced Frame Beam Complex Material
Authors: Yue Hang , Liu Shuai
Published: August 2013

The article tries to describe the application of CFRP in frame beam used in the reinforce of civil engineering through some concrete engineering examples. Futuremore ,the writer analysises the reinforce ment principle,construction preparation construction process and the construction matters in details. As there doesnt exist construction acceptance criteria and other specification of carbon fiber used in the reinforced repairment at home, thus in this article, the writer aims at analysising the usage of carbon fiber in the construction of civil engineering structures. The result of shows that there are broad prospects of the carbon fiber reinforcement in Engineering repairment, the reinforcement and alterations of housing construction and Bridge Engineering.
Safety Analysis of Rural Buildings in Chaohu City Anhui Province
Authors: Wang Fan , Mo Sheng Hao , Luo Zhi Feng
Published: August 2013

In order to find out the problems of rural buildings in Chaohu City, we gave the safety level assessment of most rural buildings which belong to Tianhe Street in Chaohu and analyze the representative problems and dangerous points, we also make the corresponding solution of these problems. This survey can be the guidance or theoretical support for the local government to change the rural buildings current situation and reinforce the decrepit house.
Model Test of Valve-Pipe Grouting Technology to Soft Ground
Authors: Song Xiu Guang , Zang Ya Nan , Chen Qing Cun , Wu Jian Qing , Zhang Hong Bo
Published: August 2013

There are many engineering diseases during asphalt road operating process caused by poor subgrade bearing capacity or pavement structural strength, mainly as the form of structural cracks, net-shaped cracks, subsidence, rutting. This phenomenon is more widespread in the level road whose structure form is rock filled sand or lime-flyash soil. Due to the engineering diseases of level road caused by poor subgrade bearing capacity or pavement structural strength, analyzing and comparing of various repair and reinforcement method, valve-pipe grouting technology is proposed. This paper revealed the grouting slurry diffusion and consolidation forming situation of the valve-pipe grouting technology.
The Discussion about Improving the Bearing Capacity of Single Pile for Bored Pile in Sandy and Silt Layer
Authors: Feng Yu Qin , Wang Ying Hao
Published: August 2013

The bored pile which have the unique advantage in having no noise, no shake, no upheaval, no sides way in the process of construction has became into one of the most widely used pile foundations in high heavy construction in Inner Mongolia region. Through an engineering project of bored piles in Inner Mongolia region, this article takes an analysis for bearing behavior of the bored piles in sandy and silt layer in this region. It also discusses the influence construction technology on pile-end ultimate resistance and the reasonable range of reduction factor of the ultimate resistance. When the soil layers structure is similar, it could improve bearing capacity of single pile for bored pile by utilizing the supporting layer and substratums optional regrouping. Utilize traditional single pile bearing capacity theory formula calculating and the static load test results it takes an analysis, finding out the approach of improving the bearing capacity of single pile for bored pile in sandy and silt layer. So we could find the optimization design for pile foundation bearing capacity of bored pile and thus promote the improvement in bored piles theory research and engineering application level in Inner Mongolia region and provide theory and engineering design experience.
Study on Flexural Toughness of Steel Fiber Reinforced Concrete in Dam Strengthening Project
Authors: Dai Xin Rong , Zhu Lei , Peng Jian He
Published: August 2013

Through the laboratory and field tests of flexural toughness for steel fiber reinforced concrete (SFRC) joists, the relations between different steel fiber contents/different mix proportions and the flexural toughness of SFRC were investigated, and an economic, reasonable mix proportion for moulded SFRC is thereby proposed. According to the study results, this paper may guide the design and construction to meet the requirements of dam strengthening projects and provide reference for the strengthening of similar water conservancy projects.
Numerical Simulation on Beating Capacity of Steel Reinforced Light Aggregate Concrete Beam
Authors: Zhang Jun Jie , Zhang Qiu Yuan
Published: August 2013

For a better analysis of the deformation of the steelreinforced light aggregate concrete member, adopt asymmetric loading mode,carry on numerical simulation of bearing capacity of steel reinforced lightaggregate concrete beams. The simulation results show that the: In theasymmetric loads, longitudinal reinforcement of the bottom of the beam both ends of the constrained position, due tothe presence of constraints, make it tensile stress,in the 250mmposition is tensile stress minimum, compressive stress correspondingly larger.In the central beam downward bending deformation, this part of the lower edgeof the beam longitudinal reinforcement tensile stress.
Experimental Study on External Anchorage Technique for Strengthening of the Existing Bridges
Authors: Hu Yan Jun , Du Yan Liang
Published: August 2013

Anchoring the external prestressing to the bridge end block is one of the key issues for strengthening of existing concrete bridges. This paper presents an innovative technique to fix steel brackets to the sides of the end block by two transverse pretensioned through-rods and three expansion bolts in both friction and shear pattern. In order to validate the technique, two steel reinforced concrete specimens (J1 and J2) fixed with experimental steel brackets are prepared and an experiment investigation has been carried out. Two sudden failures have been observed. The failure patterns of expansion bolts in J1 are pullout failure and shear failure, and two transverse pretensioned through-rods have large yield deformation. The failure patterns of expansion bolts in J2 are similar, but the failure patterns of two transverse pretensioned through-rods are shear fracture. The relationship of force and slip is linear but with two different slope when the load less than 2000kN in both J1 and J2.
Experimental Investigations of Masonry Columns Strengthened by SGFRP under Eccentric Loads
Authors: Zhang Zhi , Gu Qian , Yu Qi Ming
Published: August 2013

5 masonry columns were strengthened by Sprayed Glass Fiber Reinforced Polymer (SGFRP) in this paper, and a research of the seismic behavior of them tested by eccentric loading experiment was presented. The failure modes of the strengthened masonry columns were illustrated and strengthening effects of them were discussed. The results showed that the bearing capacity of the reinforced columns increased greatly, and the ductility of them also improved significantly. Comparing the strengthening effects of the columns when the thickness of SGFRP and the number of glass fiber are different, some reasonable reinforce suggestions are proposed.
Parametric Analysis on Shear Lag Effects of Box-Girder Beam
Authors: Ma Shu Fen , Zhang Xie Dong
Published: August 2013

In order to study the influencing parameters of the shear lag effects on the box-girder beam, the effective width was analyzed by the ways of looking up the present code and formula. Taking the simply supported and cantilever girder as the example, the parameter sensitivity was studied, such as width/span, cantilever length and span. The results showed that the shear lag effect of mid-span beam is small but the support beam is outstanding; the fixed amount relationship of the parameters and the shear lag effects was put forward. The conclusions will be useful for the design and construction of the box girder bridge.
Preferred Selection on Strengthening Schemes of Arch Bridge Based on Fuzzy Analytic Hierarchy Method
Authors: Sun Hao , Li Xiao Gang , Liu Shi Lin
Published: August 2013

Many factors need to be considered during the choice of strengthening scheme for arch bridges, and most factors are fuzzy. The reasonable and scientific strengthening scheme is an important precondition to ensure the effectiveness and quality of the strengthening engineering. The elementary objects of the bridges strengthening are effect reliability, economic reasonability, technological feasibility, and convenience of construction, which are used to appraise the strengthening scheme. Based on the basic objective of bridge strengthening, two levels fuzzy comprehensive appraisal index system of strengthening scheme are established, and the best scheme is chosen. Combining the idiographic example of arch bridge reinforcement, the process of fuzzy analytic hierarchy and optimum result is given. The result tests that fuzzy analytic hierarchy method is feasible during the preferred selection on strengthening schemes of arch bridge.