bluuebunny/crossref_metadata_2025 huggingface dataset:
Research and Analysis on the Localization of a 3-D Single Source in Lossy Medium Using Uniform Circular Array
Authors: Xue Bing , Qu Xiaodong , Fang Guangyou , Ji Yicai
Published: June 2017

In this paper, the methods and analysis for estimating the location of a three-dimensional (3-D) single source buried in lossy medium are presented with uniform circular array (UCA). The mathematical model of the signal in the lossy medium is proposed. Using information in the covariance matrix obtained by the sensors’ outputs, equations of the source location (azimuth angle, elevation angle, and range) are obtained. Then, the phase and amplitude of the covariance matrix function are used to process the source localization in the lossy medium. By analyzing the characteristics of the proposed methods and the multiple signal classification (MUSIC) method, the computational complexity and the valid scope of these methods are given. From the results, whether the loss is known or not, we can choose the best method for processing the issues (localization in lossless medium or lossy medium).
Non-Homogeneous Diffusion of Residential Crime in Urban China
Authors: Tang Yicheng , Zhu Xinyan , Guo Wei , Ye Xinyue , Hu Tao , Fan Yaxin , Zhang Faming
Published: June 2017

The relationship between crime and urban environment has always been the focus of crime geography. Like diseases which can transmit and diffuse, crimes may also spread during a certain period of time and to a certain area by the near-repeat effect. Traditional near-repeat analysis focuses on the spatial spread of crimes to adjacent areas, with little regard to the displacement effect. Crime displacement refers to the relocation of criminal events as a result of policing efforts. If this phenomenon is neglected, the near-repeat analysis will tend not to obtain the overall spatial distribution pattern of criminal cases, leading to limited effectiveness of crime control. This paper presents a non-homogeneous diffusion model where crime spreads not only to spatially and temporally adjacent areas, but also to areas with similar environmental characteristics. By virtue of spatial constraints and environmental characteristics, the most vulnerable areas are identified, and this will be helpful for developing policing strategy as well as for sustainable community development.
Beyond Regulation: Innovative Strategies for Governing Large Complex Systems
Authors: Young Oran R.
Published: June 2017

We have entered an era characterized by levels of complexity that are unprecedented in human experience. The hallmarks of complex systems are the growth of connectivity, the prominence of nonlinear patterns of change, the occurrence of bifurcations in contrast to oscillations, and frequent surprises associated with emergent properties. There are good reasons to question the adequacy of the standard repertory of practices associated with regulatory strategies in efforts to fulfill needs for governance in complex systems. Whereas regulatory strategies feature the articulation of rules expected to remain in place indefinitely and emphasize efforts to maximize compliance with the rules, governing complex systems calls for a willingness to experiment with innovative practices in the face of uncertainty and a capacity to adapt existing practices easily to new circumstances. It is helpful in this connection to distinguish between Type I governance, which is a matter of devising supplementary practices to augment rather than to replace regulatory measures in managing volatile oscillations, and Type II governance, which is a matter of devising new governance strategies to address needs for governance arising during periods of transformation and in the settings that become the new normal following major state changes. There is no need to discard familiar regulatory strategies. Rather, the challenge is to devise innovative steering mechanisms to augment the existing toolkit to meet needs for governance in the 21st century.
Low Frequency Quasi-periodic Oscillations in the High-eccentric LMXB Cir X-1: Extending the WK Correlation for Z Sources
Authors: Bu Qingcui , Belloni T. M. , Chen Li , Qu Jinlu
Published: June 2017

Using archival Rossi X-ray Timing Explorer (RXTE) data, we studied the low-frequency quasi-periodic oscillations (LFQPOs) in the neutron star low-mass X-ray binary (LMXB) Cir X-1 and examined their contribution to frequency–frequency correlations for Z sources. We also studied the orbital phase effects on the LFQPO properties and found them to be phase independent. Comparing LFQPO frequencies in different classes of LMXBs, we found that systems that show both Z and atoll states form a common track with atoll/BH sources in the so-called WK correlation, while persistent Z systems are offset by a factor of about two. We found that neither source luminosity nor mass accretion rate is related to the shift of persistent Z systems. We discuss the possibility of a misidentification of fundamental frequency for horizontal branch oscillations from persistent Z systems and interpreted the oscillations in terms of models based on relativistic precession.
L’éducation populaire, une voie féconde pour « démocratiser la démocratie » ?
Authors: Roy Alex
Published: June 2017

À l’heure où l’éducation populaire se questionne sur sa visée émancipatrice et de transformation sociale, l’étude ethnologique d’un de ses acteurs historiques – ATD (Agir tous pour la dignité) Quart monde – est pertinente. En effet, cette association qui lutte contre la pauvreté est l’un des artisans d’une démocratie communicative expérimentant des dispositifs qui visent une participation effective des « exclus » à la délibération. À partir d’un processus de double transformation des « exclus » et des « inclus », ATD Quart monde contribue ainsi à l’effort de « démocratisation de la démocratie ».
Faire du théâtre dans les cités
Authors: Hadj Belgacem Samir
Published: June 2017

Cet article met en perspective une expérience originale de création théâtrale dans un centre social de la banlieue parisienne autour d’un collectif de femmes qui a joué des textes du sociologue Abdelmalek Sayad. Il montre comment ce projet d’éducation populaire par le théâtre a été rendu possible notamment en s’appuyant sur des pratiques qui renouent avec des perspectives émancipatrices. Le projet n’a néanmoins pas été mené jusqu’à son terme. La pièce a en effet rencontré des difficultés de diffusion en dehors de l’espace militant et local. Le projet politique de faire entendre publiquement la parole des immigrés n’a pas réussi à s’imposer dans le champ artistique légitime.
La relation d’aide dans une fratrie avec une personne handicapée
Authors: Dayan Clémence
Published: June 2017

L’article présente une réflexion théorique sur la relation d’aide dans une fratrie comprenant une personne handicapée. Après avoir évoqué la spécificité du lien fraternel, qui est, dans la configuration des liens familiaux, un lien horizontal, l’auteur, psychologue clinicienne, montre que la relation d’aide s’inscrit très tôt dans la construction du lien fraternel avec une personne en situation de handicap. Pour plusieurs raisons, les frères et sœurs vont occuper une fonction d’aidant pour l’enfant, puis l’adolescent et l’adulte handicapé, fonction qui peut aujourd’hui être établie sur le plan juridique pour les personnes majeures. L’article interroge les répercussions de cette relation d’aide aussi bien sur la fratrie que sur les personnes en situation de handicap elles-mêmes et conclut sur la nécessité de prendre davantage en compte, à l’avenir, le point de vue des personnes handicapées.
Enjeux intersubjectifs et modalités d’échange dans les dispositifs de soin L’exemple des maladies neuromusculaires
Authors: Debs Nayla
Published: June 2017

Cet article propose d’examiner le dispositif de soin et les relations d’aide dans le contexte des maladies neuromusculaires. L’idée est de voir comment la structure de ces relations et la dissymétrie qui les caractérise sont amenées à se modifier à travers la dynamique que créent ces relations. Pour cela, avant d’examiner les enjeux relationnels à proprement parler, l’auteure met en évidence les éléments théoriques qui définissent le soin. Dans un second temps, elle confronte ce paradigme à la théorie du don d’un côté, à la psychanalyse de l’autre. En mettant en perspective ces deux modèles, elle tente de rendre compte de la négativité qui pourrait parfois traverser les relations de soin et cela à la lumière de données pratiques issues de la clinique des maladies neuromusculaires.
Emprise du père et déni du féminin Quand le travail du féminin féconde la rêverie du groupe
Authors: Bécar Florence
Published: June 2017

Dans ce récit d’une thérapie en couple, l’auteur alterne récits cliniques et analyses théoriques élaborées dans l’après-coup. Les questions ayant servi d’étayage à sa rêverie ont permis la métabolisation du matériel psychique apporté et favorisé la recherche d’une voie de dégagement par le couple enfermé dans un fonctionnement mortifère. Cette voie fut rendue possible par la rêverie du groupe patients/thérapeute ayant engendré sa mise au travail, sa fécondité, sa créativité. L’auteur formule l’hypothèse que la demande initiale présentée comme relevant d’un « problème de communication » serait le précipité d’une soumission à l’emprise paternelle et à son refus du féminin verrouillant la circulation de la parole. L’étayage du groupe constitué par le couple et la clinicienne, leur rêverie féconde et leur mise au travail les ont conduits à élaborer la structuration de l’origine et le défaut de son organisation lié au secret.
La transparentalité, une nouvelle façon d’être parent
Authors: Marchand Jean-Baptiste
Published: June 2017

Encore récemment, les transparentalités (qui concerne les familles dont un parent est transsexuel ou transgenre) étaient limitées à quelques configurations particulières. Le désir d’être parent des transsexuels et transgenres était minimisé et, hormis les transsexuels ou transgenres qui avaient eu un ou des enfants avant leur transition, seules les demandes des transsexuels étaient acceptées (sous certaines conditions). Au niveau international, force est de constater des évolutions de ce phénomène, nous obligeant à nous repencher sur lui avec un nouveau regard. Pour ce faire, cet article présentera comment les autres phénomènes que sont l’homoparentalité, le transgen-dérisme et les techniques médicales de conservation des gamètes et d’aide à la procréation amènent de nouvelles perspectives d’évolution aux transparentalités.
Appréhender les transformations organisationnelles de la santé numérique à partir des perceptions des acteurs
Authors: Habib Johanna , Béjean Mathias , Dumond Jean-Paul
Published: June 2017

Le développement des usages de la santé numérique est appréhendé actuellement comme une source de transformation du système de santé pouvant remodeler substantiellement son fonctionnement. Fondée sur un questionnaire s’adressant aux professionnels du système de santé, cette recherche analyse les transformations organisationnelles de la santé numérique à partir des perceptions des acteurs relatives aux usages souhaités de ces dispositifs technologiques dans les modalités de prise en charge des patients et de gestion du risque. Pour étudier ces perceptions dans une perspective transformationnelle, notre analyse se fonde sur une grille de lecture encore peu utilisée en systèmes d’information : le modèle « Marché, Hiérarchie et Communauté » de Paul S. Adler (Adler, 2001 ; Adler et al., 2008). Structuré autour des grands idéaux-types de l’action organisée, ce modèle constitue un canevas théorique intéressant pour interroger les acteurs sur les orientations des transformations organisationnelles associées à l’usage de nouvelles technologies. Notre recherche se propose de répondre aux questions suivantes : quelles sont les perceptions des professionnels du système de santé quant aux usages souhaités de la santé numérique ? Existe-t-il une perception dominante ou encore des tensions entre plusieurs perceptions d’usages ? Comment ces perceptions permettent-elles d’éclairer les transformations organisationnelles de la santé numérique, ainsi que les sources d’inertie associées ? La principale contribution de cette recherche est de proposer une analyse de l’espace de choix des acteurs en situation de transformation à partir de leurs perceptions des usages souhaités des dispositifs technologiques. L’analyse de ces perceptions d’usages permet, en effet, de se projeter dans des situations anticipées de transformation, reliant ainsi les niveaux micro (les professionnels), méso (les organisations) et macro (le système de santé) d’un processus de changement.
Effective use of patient-centric health information systems : The influence of patient emotions
Authors: Savoli Azadeh , Barki Henri
Published: June 2017

La présente étude a examiné comment les réponses émotionnelles des patients face à un Portail (c.-à-d. un système de gestion des maladies chroniques centrée sur l’utilisateur et conçu pour aider les patients à autogérer leur maladie) ont influencé l’efficacité avec laquelle ils ont utilisé le Portail. Grâce à l’analyse des entretiens avec 34 patients asthmatiques qui ont utilisé un Portail d’autogestion de l’asthme, la présente étude a identifié six catégories d’émotion que le Portail a suscitées chez les patients ayant participé à l’étude. Bien que les patients qui avaient des émotions négatives envers le Portail l’ont utilisé de façon inefficace, les émotions positives, quant à elles, étaient liées aux utilisations efficaces autant qu’inefficaces, selon la perception que les patients avaient du Portail. Par ailleurs, malgré le fait que les émotions positives étaient toujours associées à une fréquence d’utilisation élevée du Portail, cette utilisation n’était pas toujours efficace car elle n’était pas toujours alignée avec l’objectif d’autogestion de l’asthme. Ces résultats indiquent que les concepteurs et les analystes des systèmes ont besoin de porter plus d’attention aux réponses émotionnelles des patients-utilisateurs, tout en essayant de minimiser l’émergence des émotions négatives en concevant des systèmes qui génèrent chez des patients une expérience et une image de soi positives ainsi qu’une certaine joie, et d’encourager une utilisation efficace de ces systèmes.
Groupe thérapeutique d’enfants confiés à la mission de protection de l’enfance par la justice : une méthodologie systémique en CAMSP
Authors: Legendre Christian
Published: June 2017

Les jeunes enfants (moins de 6 ans) confiés par les juges des enfants aux conseils départementaux au titre de la protection de l’enfance vivent la plupart du temps dans des familles d’accueil et rencontrent leur famille biologique tantôt avec une médiation, tantôt sans. Ils sont donc inclus dans des systèmes à double parentalité. Ils présentent par ailleurs fréquemment des troubles qui les amènent à consulter des établissements médico-sociaux comme les CAMSP. Leur « prise en charge » thérapeutique individuelle se heurte régulièrement à des difficultés importantes et piétine : ils sont en effet rarement en mesure d’élaborer une demande d’aide psychologique individuelle. Les demandeurs sont ailleurs (assistants familiaux, référents des pôles placement familial, école). L’auteur propose et décrit un dispositif thérapeutique groupal systémique, élaboré et mis en œuvre dans un CAMSP. Ce dispositif s’adresse aux enfants, à leurs assistants familiaux, à leurs familles biologiques (indirectement), à leurs référents du conseil départemental. Une vignette clinique illustre le propos.
Studies of Dyeing of Silk Fabric with Natural Indigo Using Pad-Dry and Pad-Batch Techniques
Authors: Mongkholrattanasit Rattanaphol , Sasithorn Nongnut , Klaichoi Charoon , Changmuong Wasana , Vaisalong Jittrawan , Rungruangkitkrai Nattadon , Udon Somchai , Sasivatchutikool Pornphanit
Published: June 2017

Natural indigo dye was applied on silk fabric by using pad-batch and pad-dry techniques in the present of thiourea dioxide and sodium hydroxide. Alum (AlK(SO4)2), ferrous sulfate (FeSO4), and stannous chloride (SnCl2) were used as mordants. The colour of each dyed fabric was investigated in terms of the L*, a*, b* and K/S values. The effects of different dye concentrations with the use of applying padding techniques in the dyeing process was investigated. The colour fastness to washing, light, rubbing, water, and perspiration of dyed silk fabrics was performed according to the present ISO standard. Silk fabric was dyed by using a natural indigo colourant, applying one with metal mordant and one without giving the silk fabric a blue shade. However, a greenish blue shade was found as a dyeing result by adding a ferrous sulfate mordant. The fastness properties of washing, water, perspiration, and rubbing were very good level. However, a fair rating level was observed using a light fastness dyeing technique.
Analysis on the Free Forging Process of the Heavy Rack for Ship Lift
Authors: Men Zheng Xing , Ma Ya Xin , Yue Tai We , Liu Rui Lin
Published: June 2017

Heavy racks are the main load-bearing components and play more important position in great engineering equipments. Along with the requirement of the equipment efficiency promotion, the large-scale trend of rack is obvious. Among them, the rack for the Chinese Three Gorges ship lift total up to 5000mm. At present, the large rack mainly made by casting. Compared with the casting, the forging rack can greatly improve the mechanical properties and the service life. The aim of this work is feasibility analysis of free forging for large rack, as large T-shape section forging. Four possible forging schemes were simulated and compared by the finite element method, and the possible defects of all the schemes and their application scope were explored. Finally, it was proved that the free forging of heavy rack was realized by simple dies.
The Anti-Blocked Safety Firing Head Technological Research
Authors: Wang Feng , Ma Tao , Jiang Fang Fang , Lei Cheng Wen
Published: June 2017

In this paper, ANSYS-LSDYNA is used to establish the numerical simulation model of the blocked collision and the blocked hazard is analyzed in the process of putting the oil perforating string into downhole. According to the analysis results, the anti-blocked safety firing head is designed and the key technology is carried on the structure design and the experimental study [1]. The field application proved that this technology can effectively eliminate the potential hazards of mistaken perforating caused by sliding, falling objects, etc. It’s safety, reliable, and low cost.
Prediction and Optimization for Wall-Flow Structure Porous Ceramic Filter on Ballast Water Treatment
Authors: Zhang Man Xia , Liu Yan , Ma Lei Si , Xie Mei Na , Zhu Yi Min
Published: June 2017

In light of urgent requirement of onboard ballast water treatment, a novel wall-flow structure porous ceramic filter (PCF) has been applied with combination of UV light in our laboratory works. According to the strict criteria of International Maritime Organization (IMO) on ballast water treatment, removal efficiencies on indicator planktons should be almost 100% even at high initial densities. However, the treatment efficiencies of PCF may be greatly affected by operational conditions of the system. Hence response surface methodology (RSM) was used to evaluate the significance of the operational factors on algal removal efficiencies. Based on our previous works, flow rate, algal density and algal size were considered as three key conditional factors during PCF treatment. These three individual factors and interactive effects between each two facts were studied statistically by Minitab 15. Also, experimental studies were arranged according to full factorial design of a 6L PCF on simulated ballast water treatment at different flow rates, algal densities and algal sizes. By computational prediction and mathematical analysis, the operational conditions were optimized with first order derivation of predicted model. And by doing so, the utmost optimization was estimated to achieve higher performance of PCF system.
Preparation and Study of a Type of Magneto-Rheological Materials Used in Vibration Control of Space Grid Structure
Authors: Yu Guo Jun , Wen Xi Xi , Liu Yu , Su Bo
Published: June 2017

A type of Magneto-Rheological Materials (MRMs) was prepared. The off-state viscosity and the shear stress of the MRMs were characterized and studied by an advanced rotational rheometer system. A kind of Self-Decoupling Magneto-rheological (SDMR) damper was established based on these MRMs. An intellectual isolation system for grid structures was obtained by integrating SDMR damper and isolation device. The seismic whiplash effect of the top bent frame column and space grid roof of the hydropower plant could be reduced. Furthermore, the half stable increment method was proposed as the semi-active strategy. The results indicated that the SDMR dampers used at the grid roof supports setting plate rubber bearings can significantly improve the vibration performance and energy dissipation structure roof isolation system in different seismic intensity. In addition, these SDMR dampers can effectively reduce the lateral slippage of the plate rubber, so as to avoid failure or damage of the isolation system because of the transfinite horizontal displacements. Compared with the conventional damper only in case of multiple earthquakes, the damping force and adjustable multiple of this SDMR damper have better adaptability, and this SDMR damper provides a higher safety factor.
The Establishment and Analysis of Bidirectional Cockcroft-Walton Circuit Model
Authors: Wu Guo Zeng , Dong Quan Lin
Published: June 2017

High voltage DC power supply is very important in laser and high precision instruments, so the stability of high voltage DC power supply has an affect on the stability of laser and equipment. The voltage doubling rectifier circuit is the core component of the high voltage generator, so it is very important to study the stability of the voltage doubling rectifier circuit. Through the study of bidirectional rectifier circuit, double voltage rectifier circuit produces an output ripple and response time is superior than the basic voltage rectifier circuit. At the same time to study the bidirectional rectifier circuit is optimized, the capacity of the output arm greatly increases which leads to reduction in the output ripple, as the capacity reaches large enough value the output ripple approaches zero. Thus, greatly increasing the circuit in steady state time.
Dynamic Characteristics Analysis of the Feeding System Based on Conjoint Interface
Authors: Li Er Bo , Jin Xin , Li Qi Ming
Published: June 2017

Because the key factors of the dynamic performance of the machine tool are related to the characteristics of the conjoint interface, the feeding system as an important part of the machine tool, which contains typical rolling conjoint interface and fixed conjoint interface, so in order to study the dynamic performance of machine tool better, the modal analysis is carried out on the feeding system. In this paper, the finite element model simulation and test methods will be combined. First, making a finite element analysis of the feeding system to obtain its corresponding mode and frequency; Secondly, the actual modal test experiment is carried out, and the result is compared with the simulation result through the follow-up data processing; Finally, the causes of the error are analyzed, and the correctness of the method is verified.
A FDM for Burgers’ Equation on Unbounded Domains Using High-Order Artificial Boundary Conditions
Authors: Zheng Quan , Liu Yu Feng
Published: June 2017

Burgers’ equation on an unbounded domain is an important mathematical model to treat with some external problems of fluid materials. In this paper, we study a FDM of Burgers’ equation using high-order artificial boundary conditions on the unbounded domain. First, the original problem is converted into the heat equation on an unbounded domain by Hopf-Cole transformation. Thus the difficulty of nonlinearity of Burgers’ equation is overcome. Second, high-order artificial boundary conditions are given by using Padé approximation and Laplace transformation. And the conditions confine the heat equation onto a bounded computational domain. Third, we prove the solutions of the resulting heat equation and Burgers’ equation are both stable. Fourth, we establish the FDM for Burgers’ equation on the bounded computational domain. Finally, a numerical example demonstrates the stability, the effectiveness and the second-order convergence of the proposed method.
Numerical Simulation on Flow and Heat Transfer of Power Law Fluid in Structured Packed Porous Media of Particles
Authors: Tian Xing Wang , Yin Yu Zhen , Wang Ping , Xu Lin
Published: June 2017

Flow and heat transfer of non-Newtonian fluid in porous media is an universal physical process in nature, industry and agriculture. With a certain concentration of HPAM aqueous solution (a typical power-law type non-Newtonian fluid) as the fluid medium, constructing the porous media skeleton model of orderly arrangement of spherical particles, the flow and heat transfer characteristics in three-dimensional orderly arrangement of porous media have been investigated numerically by using Fluent software. By employing the method of fluid-solid coupling subject to uniform heat flux, the effects of power law fluid rheological index, particle material, particle diameter and porosity on the flow and heat transfer characteristics are analyzed in detail. And also the concept of thermal efficiency is introduced to gain the comprehensive evaluation of its flow and heat transfer characteristics. The results show that the flow resistance decreases with the increase of the power-law index, particle diameter and porosity, and has nothing to do with the thermal conductivity coefficient of particles; while the local convection heat transfer coefficient increases with the increase of the power-law index and the thermal conductivity coefficient of particles, and decreases with the increase of particle diameter and porosity. The results can provide a theoretical basis for the flow and heat transfer mechanism of the power-law type non-Newtonian fluid flowing through the three-dimensional structured packed porous media of particles.
Theoretical and Numerical Calculation on the Added Mass of Ahmed Body
Authors: Du Gui Tao
Published: June 2017

Because of the added mass, the aerodynamic drag of the automobile will increase obviously when accelerating in the still air. In this paper, it firstly gave the definition of the added mass, and presented that there was little research on the calculation of the added mass of automobile. Then through the analysis of the theoretical calculation method for the added mass, it pointed out that, for the added mass of the car-body with a complex shape, there was much difficulty in the theoretical calculation. Alternatively, a numerical calculation method for the added mass of car-body was derived. The simulation model adopted the Ahmed body and the corresponding verification experiment was completed in the Tongji Automotive Wind Tunnel center. The results indicate that the added mass is a constant which is only dependent on the body-shape. For the model investigated, the added mass is 0.0052kg that is approximately equal to the air displaced by the car-body. As the body accelerates to 4m/s2, the aerodynamic drag is increased by 1.89% because of added mass. Therefore, it needs to pay more attention to the impact that the added mass has on the dynamic performance of vehicle when proceeding the aerodynamic designs (especially for the high power performance vehicles). Meanwhile, it still makes a correction to the conventional aerodynamic drag formula. This paper also demonstrates that, with the analysis of the flow-field of car-body, the added mass essentially stems from the additionally work done by the car-body to increase the kinetic energy of external fluid as it speeds up.
Characteristics of Pervious Concrete with Environmental Friendly Based Binder
Authors: Endawati Jul , Diasti Lilian , Enung Enung
Published: June 2017

In general, the use of massive flexible and rigid pavement for road construction causing green land reduction that have an impact on the reduction of the catchment area. Therefore, the use of porous concrete is an environmentally friendly alternative. Its usage is expected to absorb water into the ground. Permeable pavements have different design goals if compared to the conventional pavement, due to the ability to infiltrate the storm water through the pavement surface. The purpose of this research is to get the optimum proportion of porous concrete mixture using a friendly environment binder material. Fly ash (FA) and silica fume (SF) were used to replace a certain part of the Portland Cement Composite (PCC). The maximum FA replacement referred to the proportions of the FA percentage in the massive paving industry (25%) and the maximum SF replacement (6%) as recommended by ACI 225R-10. The highest 90-day compressive strength gained by specimens of 12% PCC replacement by FA (5.87 MPa), which is 10.2% higher compared to the porous concrete compressive strength which binder composed of 12% FA and 6% SF replacement. The permeability varies at 28 days, but at the age of 90 days, the porous concrete permeability almost evenly, so that the influence of the 6% silica fume in the mixture is not indicated. The ratio of 6% replacement of cement by silica fume with no fly ash gave the highest permeability of 1.4 cm/s, approaching the previous research conducted by Schaefer, et al (2006), while at the age of 90 days the permeability of porous concrete (1.11 cm/s) closed with the results done by Montes (2006).
Non-Destructive Testing of High Temperature Degraded Concrete Composite of Portland Cement CEM I 42.5 R and Gravel Aggregate 11/22 by Transverse Waves
Authors: Dvořák Richard , Chobola Zdeněk , Hela Rudolf , Bodnárová Lenka
Published: June 2017

This paper study applicability of non-destructive method of impact echo for diagnosis of high temperature degraded plain concrete. Impact echo method is often used for detection of defects, cracks, and non-homogeneity in constructions. It's based on impact-generated mechanical wave that propagate through the mass of testing specimen and is reflected and partially absorbed by voids and surface. In this paper, we present results of an experiment where test specimens of dimension 0.1 x 0.1 x 0.4 m were created with usage of coarse aggregate 11/22 mm. Specimens has been divided to 7 sets. First set of test specimens were kept at laboratory conditions as a reference. Next six sets were heated up to 1200 ° C. After this heating, the specimens were cooled spontaneously and then tested by impact echo method. We used a steel hammer as an exciter of mechanical wave, which has been transferred to signal by the piezoelectric sensor. Then we analyzed this signal and we focused on transverse waves. Results from non-destructive tests were compared with results from destructive tests.
A Research of the Senior Cognition on the Co-Housing Building Type
Authors: Tsai Shu Ying , Ou Cheng Huang
Published: June 2017

Many successful projects of co-housing have extensively influenced people’s quality of living worldwide. This study thus discusses the perception of the elderly regarding co-housing from with particular focus on their behavior pattern and their relationship with the community environment. To this end, a questionnaire survey was conducted for the elderly living in the Taipei Metro Area. A total of 111 valid responses of a specially designed questionnaire were collected and the survey results were analyzed. The results indicated that the most significant factor is housing type, and that in co-housing, the public facilities most demanded by the respondents are public flower gardens, playgrounds, and group dining space. The Recommendation of this study were as follows: (1) Communicating with and supporting people outside one’s own family and with no blood relationship in diverse ways. (2) In public facilities for residents to dine together and share experiences and skills with each other, thereby fostering extensive interpersonal networks. (3) Recommended to use environmental education and participatory design to achieve substantial benefits and results. (4) Subject to minimal requirements of private space, public facilities that serve the public interest should take the larger proportion.
Numerical Investigation of Four Seismic Upgrading Techniques on a Masonry Bell Tower
Authors: Milani Gabriele , Shehu Rafael , Valente Marco
Published: June 2017

This paper presents some preliminary results from the numerical investigations of different interventions for the seismic upgrading of a masonry bell tower. Masonry bell towers belong to the cultural and historical heritage, are very widespread in Italy and their conservation has been given special attention in recent years. Their high vulnerability is related to the combination of mechanical material properties, geometrical irregularities, presence of inclination, foundation settlements and seismicity of the area. The present tower is located in Emilia Romagna Region, Northern Italy, recently stricken by a strong seismic sequence in May 2012. Analyses results show that the retrofitting of masonry bell towers is highly recommended in order to mitigate their present seismic risk. Four different upgrading techniques, consisting of grouted mortar, FRP sheets, internal steel frame and prestressing vertical rods, are investigated and compared in terms of structural performance improvement. The grouted mortar and internal steel frame techniques are found to be reasonable solutions when compared to the other proposals for the specific seismic intensity level. Furthermore, the other techniques have a relatively high level of invasiveness which is recommended to be avoid where possible. Experience has shown that the most effective interventions are those that not only protect the structure, but also preserve the built heritage.
Evaluation of Green Building Energy-Saving Technology Based on Entropy Weight Method
Authors: Jin Liu
Published: June 2017

In this paper, evaluation index system of green building energy-saving technology was established on the basis of comprehensive analysis of the factors affecting green building energy-saving technology. This evaluation index system was divided into two levels. Thermal performance of maintenance structure, energy efficiency of building equipment, design management, operation management and indoor comfort and health were one-level evaluation index, and there are eighteen two-level evaluation indexes. Entropy weight method was introduced to determine the weight of evaluation index. Fuzzy synthetic evaluation method was applied to synthetic evaluation. On this basis, a model based on entropy weight method and fuzzy synthetic evaluation method was proposed to evaluate the green building energy-saving technology. An example was given to verify the validity and feasibility of the model. Results show that the model can used to evaluate the green building energy-saving technology, and offers reference on evaluation of green building energy-saving.
Shaking Table Test Study of Reinforced Concrete Shear Wall Structure
Authors: Li Zheng , Zhou Heng , Qin Li
Published: June 2017

A reduced-scale model of 7-story reinforced concrete shear wall structure is made. Shaking-table test of the model is carried out. Two test conditions are considered. In the first condition, fixed base is used. In another condition, soil structure interaction is considered. According to the experimental results, the dynamic characteristic and seismic performance of shear wall structure is studied. The acceleration time history response of model structure is obtained. Based on the time-history response, the dynamic characteristics of model structure are studied by spectrum analysis. The Finite Element Model of actural structure is established by ANSYS. The dynamic characteristics and seismic performance of actural structure are studied. By comparing the experiment results and numerical analysis results under the fixed-base condition, the rationality of the ANSYS model and numerical analysis method of are verified.
Incremental Formulation of Concrete Creep under Stress History
Authors: Park Si Hyung , Park Yeong Seong , Lee Ta , Lee Yong Hak
Published: June 2017

An incremental format of the age-dependent constitutive equation was derived by expanding the total form of the constitutive equation by using the first-order Taylor series to describe the persistent change in the creep-causing stress state as well as drying shrinkage and the development of the elastic modulus. The resulting incremental constitutive equation was defined by three basic equations for basic creep, drying shrinkage, and the development of the elastic modulus. Three types of laboratory experiments were carried out to validate the performance of the presented age-dependent constitutive equation; these included cylindrical concrete specimen tests with and without axial reinforcements and reinforced beam specimen tests. The performance of the creep model was compared with those calculated by the other age-dependent constitutive equations.
Numerical Methods for Solving Physically Nonlinear Problems for Inhomogeneous Thick-Walled Shells
Authors: Andreev Vladimir I. , Polyakova Lyudmila S.
Published: June 2017

The paper proposes the numerical method of solution the problems of calculation the stress state in thick-walled cylinders and spheres from physically nonlinear inhomogeneous material. The urgency of solved problem due to the change of mechanical properties of materials under the influence of different physical fields (temperature, humidity, radiation, etc.). The deformation diagram describes the three-parameter formula. The numerical method used the method of successive approximations. The results of numerical calculation are compared with the test analytical solutions obtaining the authors with some restrictions on diagram parameters. The obtained results can be considered quite satisfactory.
Method of Increasing the Moment of Inertia of Metallic Angled Profile
Authors: Nezdanov Kirill , Garkin Igor
Published: June 2017

We consider the single concept of an application of analytical approximation theory to the development of building materials and of flight simulators modular architecture how complex systems. The annex to the development of simulators of dynamics flight modular architecture addresses issues of approximation of table-graphically given functions and of functions of several variables by polynomials of higher degrees. Are given the examples to describe the kinetic processes in building materials and in the development of simulators of flight dynamics.
Methods to Improve I-Profile
Authors: Nezdanov Kirill , Garkin Igor , Ovchinnikov Igor
Published: June 2017

The article discusses ways to reduce material consumption of I-rolling profile. I-beam profile is made of steel and contains shelves with parallel faces and the wall. Rational distribution of steel cross beam is provided by the fact that the flexibility of its wall which is the ratio of height wall to its thickness does not exceed the limit value of flexibility ensuring sustainability of the wall without intermediate stiffeners, and is 65 for low-alloy steel. Thickness, the height of the wall, limiting its flexibility governed by mathematical dependencies. Sectional area of the profile is distributed in the proportions 50% - wall profile, 25% - each of the shelves. The ratio of flange width to its thickness does not exceed the limit ratio, providing local resistance shelves. Of the work piece cross-sectional area A cm2, the same as the prototype, rolled I-beam maximum strength, then there is an increase in the moment of resistance Wx cm3 to about 16% and stiffness by about 37,5%.
Leachability of Immobilized Hydrocarbon Sludge in Zeolite Cement
Authors: Mohd Zain Asna , Zazarin Zahid M. , Azizli Khairun Azizi , Isa M. Hasnain
Published: June 2017

Volatile organic compounds in hydrocarbon sludge are one of hazardous waste with the potential to contaminate water bodies. Immobilization is practically used to prevent uncontrolled released of toxic substances into the environment by bind into the inert materials like cement and admixtures. An oily component in the waste interferes the immobilization process by retarding the cementation reactions. This work explores immobilization techniques using OPC and zeolite with different water to cement (WC), cement to sludge ratios (CS) and the addition of 5 to 20 wt. % zeolite with the objective of reducing waste mobility. Immobilized sludge was measured by compressive strength, porosity and leachability of metals, and oil & grease. Immobilized sludge at WC 0.35 and CS of 40 achieved 52.55 MPa UCS. Zeolite addition contributes to the increase in accessible porosity but reduces the UCS to a maximum of 31.22 MPa. Incorporation of 10 wt. % zeolite successfully binds the waste indicated by only 0.2 ppm Fe had been released into the leachate. The oil & grease leachability was found below the permissible level while achieved the acceptable compressive strength value of 20.7 MPa.
An Analysis of the Evaluation Methods for Thermal Transmittance of Curtain Wall System Based on Simulators
Authors: Bae Min Jung , Kim Yu Min , Choi Gyeong Seok , Kang Jae Sik , Choi Hyun Jung
Published: June 2017

With the window rating system being enforced, window companies are required to assign window ratings to their products. As the window ratings is based on the experimental results of fenestration, they are required to spend a lot of time and money conducting laboratory tests in order to assign window ratings to all their products. Through the window performance evaluation system using simulation, the thermal transmittance of products calculated based on numerical simulation can be used in place of experimental results to obtain the window rating. To ensure the credibility of simulation results, it is necessary to use the correct evaluation methods and primary information derived from in use practice should be available for the numerical simulation. The purpose of this paper is to investigate the evaluation methods that the simulator actually uses for the thermal performance of fenestration in WINDOW/THERM. The evaluation methods used by twenty-one simulators were investigated using primary evaluation methods for numerical simulation as the criteria. This study found that most of the simulation results were not trustworthy even though they were similar to experimental results because the evaluation methods used by simulators are incorrect. Furthermore, to enhance the credibility of simulation results, the simulator should be provided with the detailed information used in practice related to the evaluation performance of numerical simulation.
Neuron Net for Forming Optimal Smooth Trajectories Based on Bezier Splines
Authors: Yukhimets Dmitry
Published: June 2017

In this paper, the problem of planning smooth trajectories of mechatronic objects on the basis of Bezier splines of the third order with a minimal curvature is solved. Using such trajectories provides the maximal speed of movement for mechatronic objects. The neuron net, which approximates the function of the optimal selection of spline parameters is proposed to solve this problem. The advantage of the proposed approach is its lack of computational complexity, which allows its use in most on-board computers in real time.
IT Assembly Process Gripper Real-Time Embedded System Design
Authors: Lim Sun , Jung Hak Sang , Lee Seung Yong , Park Young Woo , Jung Il Kyun
Published: June 2017

In this paper we propose the gripper handle real-time based embedded system for operating robot manipulator. The general gripper has only a simple function and has also I/O module. Thus general gripper and position based robot controller combination is not suitable for precision process operation, IT assembly process. In order to give various functions and intelligence to the gripper, it is necessary to have an embedded controller that real-time guarantees. The proposed embedded system have five component that handle the pose of the gripper, measure the pose and translation of gripper, motoring the gripping tip, operate the stiffness of the gripper and communicate with Ethernet interface to the external robot controller. The external robot interface parts are supported to communicate with various external robot maker, KUKA, DENSO, ROBOSTAR etc. The validation and functional ability is tested on the LAB environment.
Thermal State of Implantable Mechatronic Unit for Pulsative Total Artificial Heart
Authors: Zhdanov Aleksey V. , Belyaev Leonid , Novikova Elena , Morozov Valentin
Published: June 2017

One of the important problems of implantable artificial heart systems development is ensuring of their continuous work during of all time of implantation in the limited heat transfer conditions. Temperature of the mechatronic unit housing shouldn't exceed forty degrees Celsius, and the overheating to forty-two degrees Celsius is admissible only in short-time modes. For the solution of this problem the numerical simulations of a thermal condition of implantable part of artificial heart mechatronic unit was carried out and based on results of the solution of a stationary task of heat conductivity. For the solution a stationary task of heat conductivity the finite-element analysis system ANSYS Workbench was used. The Finite-element model parameters are the following: number of nodes 642263 nodes, number of hexahedral finite-elements 363231, average length of the rib 1mm. Modeling was carried out for various power of thermal losses: 5, 8, 10 watts for which thermal stream density are 1500, 2400 and 3000 watts per square meter, respectively. The increasing of power of thermal losses from 5 to 10 watts increases the maximum temperature of surface of the mechatronic unit housing by only 6 degrees from thirty-three to thirty-nine degrees Celsius. The carried-out simulation of the established thermal state at various power of thermal losses showed lack of an overheat of a surface of the mechatronic unit housing above critical temperature during the continuous work for a long time and principle possibility of application of the developed design as implantable system.
Research on Vibration Isolation System Based on Disturbance Observer PID Control Algorithm
Authors: Li Jian Liang , Liu Xiao Xi , Li Shu Qing , Tao Zhi Fei , Ma Lei
Published: June 2017

The research mainly focuses on the performance of the controllable hypocenter in the low frequency band. The hybrid vibration isolation method based on the disturbance observer PID control algorithm is used to improve the excitation signal quality. Based on the analysis of the structure and working principle of vibration isolator, the physical model and mathematical model are established, and the simulation test of ZK-5VIC virtual test vibration and control system is carried out. The experimental platform of hybrid vibration isolation system with low frequency interference is set up. The experiment of excitation and acquisition of low frequency signal is carried out, which provides the theoretical basis and guarantee for the vibration isolation technology in the low frequency range below 3Hz.