bluuebunny/crossref_metadata_2025 huggingface dataset:
Low Power VLSI Circuit Design using Energy Recovery Techniques
Authors: Bhaaskaran V. S. Kanchana
Published: June 2016

With the rapidly evolving silicon technology, the power density becomes increasingly high. Quadratically related to power, the voltage scaling offers a means of minimizing energy. However, power supply scaling demands less threshold voltage, which rises leakage current. Several low power techniques have been devised. This chapter deals with the non-conventional low power design solutions, based on adiabatic switching theory. In such circuits, the energy rather than getting dissipated during every cycle, is transferred back and forth between the logic and power-clock sources. A brief discussion on the reversible logic circuits will be presented followed by the fully adiabatic and quasi-adiabatic circuits. The use of power-clock sources for operating the adiabatic circuits will also be introduced. The generalized energetics of an adiabatic circuit followed by the typical loss models of the adiabatic families are presented. Some of the adiabatic circuits employing CMOS transistors are introduced in the chapter. A short comparison for the adiabatic circuit leakage models follows.
Low Power Design of High Speed Communication System Using IO Standard Technique over 28 nm VLSI Chip
Authors: Das Bhagwan , Abdullah Mohammad Faiz Liew
Published: June 2016

The low power design of Very Large Scale Integration (VLSI) system is one of the hot topic in research. In this chapter, the low power design for VLSI based high-speed communication is realized over 28 nm VLSI chip packed in UltraScale Field Programming Gate Array (FPGA) using proposed technique. The high-speed communication system is taken as case study for the low power design of VLSI system. Similarly, various VLSI design system can be realized to achieve the low power VLSI system design goal. High-speed communication systems provide the smooth operation for global internet traffic and requires high power devices and components.IO standard is powerful interface tool that provides low power consumption using the fast signal termination by mean of electrical characteristics. In result for this work, more than 96% power reduction is achieved for VLSI based high-speed communication system, when operated at 500 GHZ, 900 GHz, 10 THz and 17 THz carrier frequencies using the High-Speed Unterminated Logic IO Standard. The power analysis is performed using XPA analyzer in Xilinx suite.
Modeling Stochastic Gene Regulatory Networks Using Direct Solutions of Chemical Master Equation and Rare Event Sampling
Authors: Cao Youfang , Terebus Anna , Liang Jie
Published: June 2016

Stochasticity plays important roles in many biological networks. A fundamental framework for studying the full stochasticity is the Discrete Chemical Master Equation (dCME). Under this framework, the combination of copy numbers of molecular species defines the microstate of the molecular interactions in the network. The probability distribution over these microstates provide a full description of the properties of a stochastic molecular network. However, it is challenging to solve a dCME. In this chapter, we will first discuss how to derive approximation methods including Fokker-Planck equation and the chemical Langevin equation from the dCME. We also discuss the widely used stochastic simulation method. After that, we focus on the direct solutions to the dCME. We first discuss the Finite State Projection (FSP) method, and then introduce the recently developed finite buffer method (fb-dCME) for directly solving both steady state and time-evolving probability landscape of dCME. We show the advantages of the fb-dCME method using two realistic gene regulatory networks.
Optimal Intervention Methods for Markovian Gene Regulatory Networks
Authors: Yousefi Mohammadmahdi Rezaei
Published: June 2016

A central problem in translational medicine is to provide a framework for deriving and studying effective intervention methods to elicit desired steady-state behavior for a gene regulatory network of interest with Markovian dynamics. Heretofore, two rather different external control approaches have been taken. The first optimizes a subjectively defined cost function while modeling treatment constraints; therefore, desirable shift of the steady-state mass is a by-product. The second approach, on the other hand, focuses solely on the steady-state behavior of the network and provides the maximal shift achievable. Although both approaches are optimal with respect to their objectives, the choice of which to use depends on the treatment goals.
On Vision-Based Human-Centric Virtual Character Design
Authors: Borovikov Eugene , Zavorin Ilya , Yershov Sergey
Published: June 2016

Enabling cognition in a Virtual Character (VC) may be an exciting endeavor for its designer and for the character. A typical VC interacts primarily with its virtual world, but given some sensory capabilities (vision or hearing), it would be expected to explore some of the real world and interact with the intelligent beings there. Thus a virtual character should be equipped with some algorithms to localize and track humans (e.g. via 2D or 3D models), recognize them (e.g. by their faces) and communicate with them. Such perceptual capabilities prompt a sophisticated Cognitive Architecture (CA) to be integrated into the design of a virtual character, which should enable a VC to learn from intelligent beings and reason like one. To seem natural, this CA needs to be fairly seamless, reliable and adaptive. Hence a vision-based human-centric approach to the VC design is explored here.
Personality-Based Cognitive Design of Characters in Virtual Environments
Authors: Saberi Maryam
Published: June 2016

Personality-based cognitive architectures should yield consistent patterns of behaviour through personality traits that have a modulatory influence at different levels: These factors affect, on the one hand, high-level components such as ‘emotional reactions' and ‘coping behaviour', and on the other hand, low-level parameters such as the ‘speed of movements and repetition of gestures. In our hybrid cognitive architecture, a deliberative reasoning about the world (e.g. strategies and goals of the 3D character) is combined with dynamic real-time response to the environment's changes and sensors' input (e.g. emotional changes). Hybrid system copes dynamically with changes in the environment, and is complicated enough to have reasoning abilities. Designing a cognitive architecture that gives the impression of personality to 3D agents can be a tremendous help making 3D characters more engaging and successful in interactions with humans.
The Contemporary Craft of Creating Characters Meets Today's Cognitive Architectures
Authors: Bringsjord Selmer , Licato John , Bringsjord Alexander
Published: June 2016

What does the contemporary craft of character design (by human authors), which is beyond the reach of foreseeable AI, and which isn't powered by any stunning, speculative, AI-infused technology (immersive or otherwise), but is instead aided by tried-and-true “AI-less” software tools and immemorial techniques that are still routinely taught today, imply with respect to today's computational cognitive architectures? This chapter narrows the scope of this large question, and argues that at present, perhaps only the cognitive architecture CLARION can represent and reason over knowledge at a level of logical expressivity sufficient to capture such characters, along with the robust modeling implied by contemporary story and character design.
Virtual Soar-Agent Implementations
Authors: Turner Jeremy Owen
Published: June 2016

This chapter provides a brief overview of those virtual agent implementations directly inspired by the cognitive architecture: Soar. This chapter will take a qualitative approach to discussing examples of virtual Soar-agents. Finally, this chapter will speculate on the future of Soar virtual characters. The goals of this chapter are sixfold. The first goal is to explain why cognitive architectures are becoming increasingly important to virtual agent design(s). The second goal is to convey why this chapter focuses exclusively on virtual agents that utilize the Soar architecture. The third goal is to explore some of Soar's technical details. The fourth goal is to showcase a few diverse examples where Soar is beginning to have a design impact on virtual agents. The fifth goal addresses Soar's limitations – when applied to agent design in virtual environments. The final goal speculates on ways Soar can be expanded for virtual agent design(s) in the future.
Towards Truly Autonomous Synthetic Characters with the Sigma Cognitive Architecture
Authors: Ustun Volkan , Rosenbloom Paul S.
Published: June 2016

Realism is required not only for how synthetic characters look but also for how they behave. Many applications, such as simulations, virtual worlds, and video games, require computational models of intelligence that generate realistic and credible behavior for the participating synthetic characters. Sigma (S) is being built as a computational model of general intelligence with a long-term goal of understanding and replicating the architecture of the mind; i.e., the fixed structure underlying intelligent behavior. Sigma leverages probabilistic graphical models towards a uniform grand unification of not only traditional cognitive capabilities but also key non-cognitive aspects, creating unique opportunities for the construction of new kinds of non-modular behavioral models. These ambitions strive for the complete control of synthetic characters that behave as humanly as possible. In this paper, Sigma is introduced along with two disparate proof-of-concept virtual humans – one conversational and the other a pair of ambulatory agents – that demonstrate its diverse capabilities.
A Universal Architecture for Migrating Cognitive Agents
Authors: Hassani Kaveh , Lee Won-Sook
Published: June 2016

In this chapter, the characteristics of a cognitive architecture that can migrate among various embodiments are discussed and the feasibility of designing such architecture is investigated. The migration refers to the ability of an agent to transfer its internal state among different embodiments without altering its underlying cognitive processes. Designing such architecture will address both weak and strong aspects of AI. The authors propose a Universal Migrating Cognitive Agent (UMCA) inspired by onboard autonomous frameworks utilized in interplanetary missions in which the embodiment can be tailored by defining a set of possible actions and perceptions associated with the new body. The proposed architecture is then evaluated within a few virtual environments to analyze the consistency between its deliberative and reactive behaviors. Finally, UMCA is tailored to automatically create computer animations using a natural language interface.
Game AGI beyond Characters
Authors: Zook Alexander
Published: June 2016

Artificial General Intelligence has traditionally used games as a testbed to develop domain-agnostic game playing techniques. Yet games are about more than winning. This chapter reviews recent efforts that have broadened the ways Artificial Intelligence (AI) is used in games, covering: modeling and managing player experiences, creating novel game structures based in interacting with AI, and enabling AI agents to make games. Many of the techniques used to address these challenges have been ad hoc approaches to solving specific problems. This chapter discusses open challenges in each of these areas and the potential for cognitive architectures to provide unified techniques that address these challenges.
Macroeconomic Determinants of the Behavior of Dhaka Stock Exchange (DSE)
Authors: Nisha Nabila
Published: June 2016

Many past studies documented a strong evidence of a linkage between stock prices and macroeconomic activities across different stock markets and time horizons. However, most of these studies have focused on developed economies and highlighted the impact of either domestic variables or a few global factors. In recent times, the impact of global macroeconomic factors upon stock returns has garnered a lot of interest due to globalization. The aim of this paper is therefore to examine the combined influence of global and domestic macroeconomic factors upon stock returns and extend this relationship to an emerging market of Bangladesh. Using Vector Autoregression (VAR) model, findings indicate a considerable impact of money supply for the stock returns of Dhaka Stock Exchange (DSE). Additionally, an insignificant influence of the world price index is observed, which implies a complete segmentation of DSE from the global financial markets. Finally, the study highlights regulatory changes and policy-making decisions from the perspective of Bangladesh.
Organizational Capabilities and Knowledge Management Success
Authors: Pandey Satyendra C.
Published: June 2016

Literature on KM has greatly emphasized the role of IT as a decisive element in the success of KM while other capabilities are ignored or are not taken into account together. How these capabilities work together to support KM is a subject under-explored in the literature. The present study makes an attempt to bridge this gap and tries to answer the following research questions: (a) how organizational capabilities manifest themselves in the knowledge management processes; (b) how do the capabilities support the KM initiatives; and (c) how similar knowledge management systems can lead to different KM success patterns with difference in capabilities. Paper makes use of qualitative case study research design to explore the above questions in two mid-sized Indian IT Companies. Findings of the study show that companies operating in the same industry and having similar knowledge management systems can exhibit different level of success and acceptance based on their organizational capabilities.
Influence of Social Media Marketing on the Brand Image of Organizations in the Hospitality Industry of Sri Lanka
Authors: Perera Graham Romello , Perera Irosha
Published: June 2016

The research paper aims to identify significant factors affecting towards the Social Media Marketing which can influence and affect the Brand Image of organizations in the hospitality sector. The identified factors include the following; 1. Positivity, 2. Consistency, 3. Differentiation, 4. Personality, and 5. Engagement Opportunities on Social Media. A framework was developed to highlight the relationship of the factors and their direct influence and impact on the Brand Image. A questionnaire is used to obtain primary data, and the data is analysed using a variety of statistical tools to measure and evaluate the strength of the influence and impact of Social Media Marketing on Brand Image of Hospitality Brands. Assessing the influence and impact of Social Media Marketing on their Brand Image can help organizations in the hospitality industry to evaluate the success of their Social Media Marketing Campaigns, while organizations that are currently not engaged in Social Media Marketing can gain a better understanding on how to utilize Social Media platforms to enhance their Brand Image.
The Effect of Country of Origin Service Quality and Brand Redeployment after M&A
Authors: Anggraeni Adilla , Hasan Kendy
Published: June 2016

The purpose of the research is to confirm that general country attribute; service quality and the redeployment strategies are variables needed by the company to smooth the process of the merger and acquisition. The main research framework was replicated from the work of Lee and Lee (2011) with alterations to suit the context of the current study. The data were collected from 150 respondents through offline and online questionnaire. Simple and multiple linear regressions are the hypothesis testing chosen for this study. ANOVA and Post-Hoc Duncan are performed to differentiate which of the five redeployment strategies is the best used by the company after done the merger and acquisition. The results conclude that general country attributes and service quality are positively linked to purchase intention in the case of Tigerair Mandala Airlines. Country of origin was found to have the most significant influence toward purchase intention, whereas service quality has the significant influence toward purchase intention.
A Common Methodology
Authors: Munn Sunny L.
Published: June 2016

Organizational structures are comprised of an organizational culture created by the beliefs, values, traditions, policies and processes carried out by the organization. The work-life system in which individuals use work-life initiatives to achieve a work-life balance can be influenced by the type of organizational culture within one's workplace, for example a structured, rigid culture in which employees are afraid to ask questions versus a flexible, open culture where discussion is encouraged. Grouping methodologies such as cluster analysis or latent class analysis can be used to create typologies of organizational culture. The focus of this paper is to deconstruct the common methodology of cluster analysis used to identify typologies of organizational culture in the NSCW Study and the NOS Study, which set out to identify the impact of organizational culture on the use and existence of work-life benefits for individuals and organizations, respectively (Munn, 2012). The paper discusses the cluster analysis methodology in detail as well as another grouping methodology – latent class analysis - as a means to understanding the place of organizational culture in work-life research. The theoretical contributions of using cluster analysis to create typologies of organizational culture and the implications for workforce research are discussed.
Are the Payments System and e-Banking in India Safer than in other SAARC Members?
Authors: Das Rituparna
Published: June 2016

This paper deals with the issues in the way the banks are managing risks in payments and settlement systems using netbanking within the legal frame of information technology in India compared to other SAARC members. It compared India with the SAARC members with respect to management of credit risk, liquidity risk and operational risk in the payment system. The findings are: (i) India, Pakistan and Nepal are stronger in managing all of aforesaid risks in their payments systems relative to the rest and (ii) India is the most permissive by nature as to the crime of computer hacking.
Balancing the Old with the New: Creating a Typology for Explicit-Implicit CSRS Interaction
Authors: Peters Richard , Caro Cary , Golden Peggy
Published: June 2016

In this article the authors articulate four separate models that consider the inter-relationships between Explicit and Implicit Corporate Social Responsibility. These models suggest that the transition from a traditional and 'quiet' social responsibility approach to a strategic and more expressive communication is design is variable and influenced by both institutional and firm level factors. At the institutional level, market liberalization, social legacy, localization forces and cultural legitimacy may all help predict where firms exist along the Explicit-Implicit continuum. Organizationally, strategy, social significance, market size and space, and self-determinism to moderate the extent to which firm adopts or resists Explicit CSRS. By considering these models and their related factors individually, the authors present a rich framework to educate future research in social responsibility and social change.
The Influence of Students' Characteristics on Mobile Device Security Measures
Authors: Yaokumah Winfred
Published: June 2016

This study aimed at investigating the influence of students' characteristics (majors, maturity, and gender) on mobile device security practices in the context of a developing country. Focusing on graduate and undergraduate students from both public and private universities, participants' characteristics were measured against three approaches of mobile devices security practices (user-behavior and activities, device settings, and disaster recovery). The sample consisted of 375 students from two public universities and three private university colleges. The results found that Technology and Engineering students differ statistically from Business and Arts students in terms of mobile device settings and disaster recovery practices. The undergraduate students were less engaged in risky activities with their devices compared with the graduate students. Moreover, the younger students were more cautious than the older students regarding user-behavior and device settings. Finally, female students were more negligent when it comes to setting the devices to militate against security threats.
The Implementation of a Cash-Flow-Based Mathematical R&D Project Selection Model
Authors: Lienland Bernhard
Published: June 2016

Customer project selection is a challenge for many industrial companies. An inappropriate project selection approach can lead to constraint violations, high fixed costs, and suboptimal portfolios. To overcome these problems a cash-flow-based linear optimization model was developed in partnership with a tier-1 automotive supplier. Implementation barriers had been verified through a case study conducted at two organizational hierarchies. Results suggest that an application at the operating levels is possible. At higher levels, though, product and firm complexity require major implementation efforts. This article serves theorists as well as practitioners in multiple regards. First, an overview of existing project selection methods and their application in practice is provided. Additionally, the supplier's current appraisal process is depicted. Second, operations research implementation barriers are identified and validated for the adoption of the proposed mathematical project selection approach. Third, a guideline including procedures to overcome experienced difficulties is presented.
A Conceptual Approach to Improve the Continuity and Integrity of Information in Project Management
Authors: Presulli Marcello
Published: June 2016

This article proposes a conceptual implementation by means of a suitable framework to improve the continuity and integrity of information in project management. It is argued that this methodology offers a comprehensive benefit in terms of a holistic project management. The benefit characterizes itself mainly by a focused representation of project sections in dependence of the desired detail degree, as well as the base of information restorable any time on the basis of the origin production data. It takes advantage of a collaborative act to declare the necessities like keywords and conventions in advance, which has the main purpose to avoid semantic misinterpretation between users and the accepted model of approach. The concept of this scheme offers generally a high flexibility with only few dependencies – hence it's easy to extend the framework on consensual agreed pragmatics. Furthermore, it is shown that in practice there is a loose coupling to the underlying host system, which promotes the exchange of other systems. Since the framework payload is based on pure keyword mechanisms with expandable notation, a high degree of user-driven specialization is offered. Finally, the keyword pragmatic is explained on four keywords which have been agreed by a collaborative collection with selected industry partners and represent on behalf a possible application to a software Repository.
The Study of the Entrepreneurial Leadership Style of Real Estate Industry in China
Authors: Mengying Zhang , Jin Qin , Hongwei Liu
Published: June 2016

The leadership style is highly correlated with the organizational performance, and the appropriate leadership style is essential for the enterprises to handle dynamic changes of management environment. In this paper, microblogs of entrepreneurs in the real estate industry are selected as research objectives to evaluate the entrepreneurial leadership style of real estate industry in China. At first, the article identifies the entrepreneurs' leadership styles of the State-owned/state-controlled companies and private real estate companies respectively. Then the article analyzes the differences between the two through the business organization paradigm and resource dependence theory. Finally, the article gives suggestions to the companies about how to select the appropriate leadership style.
Career Anchors and Employee Retention
Authors: Kannabiran Ganesan , Sarata A.V. , Nagarani M.
Published: June 2016

The success of Indian Information Technology (IT) industry is dependent on the ability of the organizations to retain the human potential. However, profound changes in the occupational environment have implications for an individual's career development in this industry. Most of the employees form a strong self-concept, a set of ‘career anchors' that hold their internal career. Organizations need to understand such career anchors and be responsive to improve the employees' intention to stay. The present empirical study attempts to evaluate the impact of nine career anchors on the employee's intention to stay, through a survey of 450 employees from the Indian IT companies. It is found that the career anchors- service, identity, variety, autonomy, creativity and geographic security have significant influence on the employees' intention to stay. However, other career anchors, namely, managerial competence, technical competence, and organizational stability have no influence on the employees' intention to stay. The paper is concluded with implications for practice and directions for future research.
Influence of ICT Skills on Use of Cloud Computing among Undergraduates in Private Universities, South-West, Nigeria
Authors: Fagbohun Michael Opeoluwa , Adetimirin Airen Edale
Published: June 2016

This study investigated the influence of ICT skills on use of cloud computing among undergraduates in selected private universities, South-West, Nigeria. Cloud computing is a novel means of providing access to diversities computer services via the Internet. Descriptive research design was employed and the population comprised 13,969 undergraduates in Babcock, Bowen and Covenant universities. Multi stage sampling technique was used, and data collection instrument was a structured questionnaire. Method of data analysis was simple percentages for research questions and regression analysis for the hypotheses. The study revealed that undergraduates possessed high level of ICT literacy skills and undergraduates used various cloud computing services and application. There was positive significant relationship between awareness and use of cloud computing (r=-.517**, n=533, p<.01.). Cloud computing is a novel technology that augment teaching and learning it also allows students to access instructional content and resources remotely. For student to effectively utilise and explore the benefit of cloud computing, the university management make available high bandwidth and dependable Private Power Plant (PPP) to increase use of cloud computing services.
Students' Sense of Belonging in Online Classes
Authors: Decker Jessica , Beltran Valerie
Published: June 2016

This study explored graduate students' perceptions of their sense of belonging in online classes, their comfort in participating in online discussions, and their technology skills. Differences in these areas among three different age groups were studied. Data were gathered via an online survey. The results of the data analysis showed that students, regardless of age, felt a sense of belonging and felt comfortable communicating in the online environment. The data also revealed that older students reported feeling more comfortable interacting with their classmates and disagreeing with their classmates while still maintaining trust than their younger counterparts. Such findings inform online educators in designing classes that meet the needs of all learners.
Pedagogy and Design of Online Learning Environment in Computer Science Education for High Schools
Authors: Anohah Ebenezer
Published: June 2016

This paper reviews literature about evolving and classical theories to understand pedagogical assumptions that inform concept of instructional strategy framework in optimizing online computer science education for high schools. Exploring these areas of research is valuable for understanding instructional practices that are needed for computer science educators to implement K-12 online computer science education. The study reveals that for students to achieve varying needs in computer science education, an online learning environment or management systems should adopt multiple pedagogical approaches. The researcher assertion is that, creating learning environment or augmenting learning management systems with plugins based on these pedagogical assumptions should for instance feature automatic feedback on programming exercises, visualization of algorithms and representation of concepts in animations or physical activities which are extremely important to incorporate computing principles in online education for K-12 students.
Applying the Polysynchronous Learning to Foster the Student-centered Learning in the Higher Education Context
Authors: Ouyang Fan
Published: June 2016

Teaching and learning computer programming has posed great challenges for both instructors and students. An emerging blended learning mode - polysynchronous learning has potentials to motivate and engage students in the programming learning process, to optimize students' programming learning experiences, and to transform the computer programming teaching and learning. This paper aims to integrate the polysynchronous learning, as a communication model, with the student-centered learning, as a pedagogical approach, to design a graduate-level course - App Design and Development. The authors primarily focuses on describing my decision-making process of the physical environment design, the technologies and tools selection, and the polysynchronous learning activity design, as well as specific details regarding these three aspects. Moreover, potentials, challenges, and implications of applying the polysynchronous learning to foster the student-centered learning in the higher education context are discussed.
Psychosocial Clusters and their Associations with Well-Being and Health: An Empirical Strategy for Identifying Psychosocial Predictors Most Relevant to Racially/Ethnically Diverse Women's Health
Authors: Jabson Jennifer M. , Bowen Deborah , Weinberg Janice , Kroenke Candyce , Luo Juhua , Messina Catherine , Shumaker Sally , Tindle Hilary A.
Published: June 2016

Background

Strategies for identifying the most relevant psychosocial predictors in studies of racial/ethnic minority women's health are limited because they largely exclude cultural influences and they assume that psychosocial predictors are independent. This paper proposes and tests an empirical solution.

Methods

Hierarchical cluster analysis, conducted with data from 140,652 Women's Health Initiative participants, identified clusters among individual psychosocial predictors. Multivariable analyses tested associations between clusters and health outcomes.

Results

A Social Cluster and a Stress Cluster were identified. The Social Cluster was positively associated with well-being and inversely associated with chronic disease index, and the Stress Cluster was inversely associated with well-being and positively associated with chronic disease index. As hypothesized, the magnitude of association between clusters and outcomes differed by race/ethnicity.

Conclusions

By identifying psychosocial clusters and their associations with health, we have taken an important step toward understanding how individual psychosocial predictors interrelate and how empirically formed Stress and Social clusters relate to health outcomes. This study has also demonstrated important insight about differences in associations between these psychosocial clusters and health among racial/ethnic minorities. These differences could signal the best pathways for intervention modification and tailoring.
Effective behavior of an interface propagating through a periodic elastic medium
Authors: Dondl Patrick W. , Bhattacharya Kaushik
Published: June 2016

We consider a moving interface that is coupled to an elliptic equation in a heterogeneous medium. The problem is motivated by the study of displacive solid-solid phase transformations. We argue that a nearly flat interface is given by the graph of the function

g

which evolves according to the equation

g_t (x) = -(-\Delta)^{1/2}g (x) + \varphi(x, g(x)) + F

where

-(-\Delta)^{1/2}g

describes the elasticity of the interface,

\varphi(x, g(x))

the heterogeneity of the media and

F

the external force driving the interface. This equation also arises in the study of ferroelectric and ferromagnetic domain walls, dislocations, fracture, peeling of adhesive tape and various other physical phenomena. We show in the periodic setting that such interfaces exhibit a stick-slip behavior associated with pinning and depinning. Specifically, there is a critical force

F^\star

below which the interface is trapped, and beyond which the interface propagates with a well-described effective velocity that depends on

F

. We present numerical evidence that the effective velocity ranges from

v \sim (-\log |F-F^\star|)^{-1}

to

(F-F^\star)^\beta

for some

0<\beta\le1

for

F

close to

F^\star

depending on

\varphi

. We obtain

\beta = 1/2

for the case of non-degenerate smooth obstacles. We further present numerical evidence that

F^\star

can depend on direction and sense of propagation.
Capilla de Nuestra Señora de la Concepción en Vázea, Recife. Brasil
Authors: Mendes da Rocha Paulo , Argenton Colonelli Eduardo
Published: June 2016

El objetivo es la construcción de la Capilla de Nossa Senhora da Conceição, propiedad de Cerâmica Brennand, en la ciudad de Recife. Además del espacio litúrgico, el programa considera también el osario de la familia y de sus descendientes. La concepción inicial parte de la idea de un nuevo espacio integrado en las ruinas de la antigua construcción que data del siglo XIX, constituida por los restos de las construcciones de ladrillos y piedras e integrada en el nuevo edificio como envoltorio de la nave.
Museo de la lengua portuguesa São paulo. Brasil
Authors: Mendes da Rocha Paulo
Published: June 2016

En el ámbito de las transformaciones que tuvieron como escenario la Estação da Luz (Estación de la Luz), mediante su interconexión de forma subterránea con la estación de Metro del mismo nombre, multiplicando por cinco el número de usuarios/día, la CPTM decidió destinar sus antiguas oficinas a la implantación de una Institución dedicada a la celebración de la Lengua Portuguesa. Con el objetivo de dar valor a las dos instancias del patrimonio, lo material (edificio) y lo inmaterial (idioma), la Fundación Roberto Marinho, se puso al frente del proyecto desarrollándolo con los recursos obtenidos a través de la Ley de Incentivo a la Cultura.
Nueva galeria Leme São Paulo. Brasil
Authors: Mendes da Rocha Paulo
Published: June 2016

La nueva galería Leme fue construida en el 2011, a dos manzanas de la galería original de 2004. Se trata de una reconstrucción del primer edificio, proyecto de Paulo Mendes da Rocha y Metro arquitetos, demolido a finales del 2011. Además de la reproducción del proyecto original también se ha añadido un anexo, un cubo de 9 x 9 metros unido al edificio principal por un puente en la planta superior.
El valor de la transformación en la relación “Arquitectura y ciudad” La producción del espacio público
Authors: Becker Margret
Published: June 2016

La apertura espacial es la principal característica de los edificios de Paulo Mendes da Rocha. Pero no se trata simplemente de una decisión sobre la estética del espacio; refleja también una actitud política y social hacia todas las escalas dentro de la ciudad. Para el desarrollo urbano de São Paulo, resultan especialmente importantes aquellos proyectos en los que los espacios abiertos y la accesibilidad generalizada al edificio se entienden como requerimientos esenciales para un bien público. Mendes da Rocha demuestra con sus obras de qué modo los desafíos actuales en el planeamiento urbano y la arquitectura pueden de nuevo estar fuertemente conectados mediante el diseño arquitectónico.
Estrategias proyectuales de Paulo Mendes da Rocha. El anexo del Mube
Authors: Cunha Perrone Rafael Antonio
Published: June 2016

El artículo analiza la propuesta de un anexo al MuBE, interpretando algunas de las estrategias proyectuales utilizadas por el arquitecto Paulo Mendes da Rocha. Se plantean reflexiones sobre las continuidades, intenciones y desgloses desarrollados en el proyecto.
Refundación. Los 3 puntos de la arquitectura de Marc Barani
Authors: Scoffier Richard
Published: June 2016

Un cementerio excavado en una colina, una estación de término de tranvía que se conecta a una autopista, una escuela de arte que se propone como un puente, un parking que sabe poner en relieve sus rampas de acceso...
Villa en el sur de Francia
Authors: Marc Barani Atelier
Published: June 2016

El proyecto se inscribe en la tradición de las villas del sur de Francia. Esta casa de vacaciones se extiende sobre la pendiente frente al mar, siguiendo el curso del sol. Las zonas de vida colectiva y los espacios de recepción (comedor, espacios de juego para niños, billar, sala de vídeo) se alojan dentro de las cajas de hormigón visto y se anclan en el terreno a través de un zócalo de piedra situado en el centro de gravedad del jardín. Las habitaciones, más separadas, están suspendidas en planta en un edificio puente que toca el suelo sobre la parte alta, la más íntima del jardín.
Palacio de Congresos Grand Nancy Congres. Centre Prouvé. Francia
Authors: Marc Barani Atelier
Published: June 2016

El nuevo centro de congresos de Nancy se instala en el centro de la ciudad, en el corazón de un dispositivo dedicado a la movilidad. El proyecto urbano de AREP lo sitúa en una posición estratégica, a la derecha del centro logístico de correos y en conexión directa con la nueva estación TGV, el tranvía y la estación de autobuses.
Tribunal de Primera Instancia Aix en Provence . Francia
Authors: Marc Barani Atelier
Published: June 2016

¿Qué modelo de Palacio de Justicia para Aix-en-Provence? Es decir: · ¿Cómo se puede dar una lectura de perennidad de la institución judicial al tiempo que se subrayan los cambios que lo anclan en su tiempo? ·¿Cómo hacer que este nuevo edificio participe de la historia del lugar en el cual se implanta, al tiempo que ocupa su propio lugar? Este doble cuestionamiento sienta las bases de este proyecto. El proyecto se va elaborando progresivamente en un enfoque reiterativo entre la búsqueda del centro de gravedad de la simbología arquitectónica de los palacios de justicia y la especificidad del contexto urbano de Aix.
Escuela nacional superior de fotografía de Arles. Francia
Authors: Marc Barani Atelier
Published: June 2016

Con el tiempo, Arles se ha convertido en la ciudad de la fotografía. Este hecho se acrecentará a partir del nuevo proyecto cultural que será materializado en forma de dos nuevos edificios situados a ambos lados de la avenida Victor Hugo: el de la Fondation Luma y el de la ENSP (Escuela Nacional Superior de Fotografía).
El hormigón oculto de la Villa Savoye
Authors: Zaparaín Hernández Fernando
Published: June 2016

Se estudia el uso del hormigón oculto en la Villa Savoye de Le Corbusier en relación al paradigma del esqueleto portante libre y apilable del sistema Domino. A la promenade arquitectónica, se une el despliegue plástico de vigas, pilotis y nervios entre la tabiquería. La claridad de la rejilla estructural se disuelve y, como en el cubismo, se pierde objetividad y verosimilitud, pero se gana complejidad y multiplicidad, incorporando la estructura fragmentada al movimiento. Esto es posible por las características del hormigón, sin cuya moldeabilidad no se podría articular este ensamblaje de formas puristas y objetuales.
Pocas, pero contundentes palabras en la obra de Mendes da Rocha
Authors: Martínez-Medina Andrés , Marcos Alba Carlos L.
Published: June 2016

La extensa producción arquitectónica de Mendes da Rocha resulta difícil de clasificar bajo el reduccionismo de los ‘ismos’ porque supone una revisión crítica y de síntesis de una modernidad replanteada. Se abordan tres aproximaciones al conjunto de su obra. Primera: la nueva tradición moderna de la arquitectura brasileña atendiendo a la implicación urbana de sus obras y a la escala de intervención (objeto, contexto, territorio). Segunda: la simbiosis entre arte y técnica desde una poética que tiende a la reducción de los elementos y a la simbolización de arquetipos. Tercera: la relativa al modo en que el maestro se enfrenta a las obras de intervención en el patrimonio recurriendo a una estética de la pobreza. Pocas, pero contundentes palabras: sencillez y humildad como atributos de la rotundidad.
Hormigones efímeros: el caso de los pabellones españoles
Authors: Jerez Abajo Enrique
Published: June 2016

Entre 1937 y 2010, España ha participado en 8 Exposiciones Internacionales relevantes con pabellón propio: París 1937, Bruselas 1958, Nueva York 1964-65, Sevilla 1992, Hannover 2000, Aichi 2005, Zaragoza 2008 y Shanghai 2010. Varios de los más destacados arquitectos españoles han sido autores de estos proyectos, casi siempre fruto de un concurso y en su mayoría no construidos. Proyectos que han dejado un rico legado de ideas, inquietudes, actitudes y estrategias proyectuales. El artículo analiza críticamente varias propuestas en las que el hormigón ha sido clave como estrategia experimental, suponiendo un avance en la investigación sobre este material y sus técnicas constructivas.
Sistemas abovedados y surrealismo en Bonet Castellana. La materialización del espacio individual.
Authors: López Martínez José María , Aroca Vicente Edith , Carcelén González Ricardo
Published: June 2016

La adscripción de Bonet Castellana al surrealismo desde su juventud, será determinante en el desarrollo de su obra. Desde el proyecto de la Maison Jaoul que realiza en el taller de Le Corbusier, iniciará la búsqueda de lo individual en su obra. El edificio de talleres de Paraguay-Suipacha será el exponente de toda la carga ideológica recibida en París y que perdurará a lo largo de su trayectoria. En la obra que Antonio Bonet realiza en La Manga del Mar Menor, este propone y ensaya diversos sistemas de cubrición abovedados que aplicará en el resto de su obra. El regreso al Mediterráneo acabará de conformar el espíritu de Antonio Bonet.
El señuelo del mecenazgo
Authors: González Antoni
Published: June 2016

Resumen no disponible
Restauración de la Iglesia del Castillo de Castelldefels
Authors: González Antoni
Published: June 2016

Como es habitual en todas las restauraciones arquitec­tónicas acometidas por el SPAL, la intervención en la iglesia del Castillo de Castelldefels es  el  resultado  de una rigurosa metodología de análisis del edificio y su entorno, llegando a una propuesta arquitectónica, que es explicada por el autor, como resultado de tres objetivos: revalorizar los aspectos arquitectónicos y artísticos  del edificio, adaptarlo funcionalmente para un nuevo uso cultural, y potenciar su capacidad informativa sobre una tan agitada e interesante historia, para  reforzar  su carácter significativo  y emblemático
El Palau d'En Bou de Valencia. Arquitecturas superpuestas
Authors: Soler Verdú Rafael
Published: June 2016

La restauración del Palau d'En Bou es una muestra de la complejidad que surge a la hora de intervenir en un edificio de arquitecturas superpuestas indefini­das, es decir, que acumula intervenciones de diver­sas épocas y estilos, pero de difícil comprensión en su estado original. El arquitecto Rafael Soler relata el proceso de lectura e interpretación del edificio durante el Estudio Previo, y las decisiones avaladas por la investigación que se tomaron durante la etapa de la restauración del edificio
La fachada de la Iglesia de San Isidoro de Oviedo: etapas de intervención y sugerencias para su conservación y limpieza
Authors: Esbert R.M. , Valdeón L. , Díaz Pache F. , Ordaz J. , Alonso F.J.
Published: June 2016

Se muestran en este artículo algunos de los aspectos metodológicos que suelen desarrollarse en los estudios sobre diagnosis de la piedra de edificación y que, a su vez, resultan necesarios para plantear las distintas eta­pas de intervención, así como los procedimientos o métodos a aplicar en los trabajos de conservación. Los diversos aspectos implicados se presentan sintetizados, de tal modo que sus contenidos pueden ser utilizados con facilidad por el conjunto de profesionales implicados en las intervenciones.  Se ha elegido como ejemplo la fachada de la iglesia barroca de San Isidoro (Oviedo), situada en el casco urbano de la ciudad, junto al Ayunta­miento y cerca de la Catedral, y en la que se va a interve­nir en un futuro inmediato
Enmiendas parciales a la teoría del restauro (II) Valor y valores
Authors: Jiménez Alfonso
Published: June 2016

El arquitecto Alfonso Jiménez nos presenta la segunda parte del artículo que publicó en el número 4 de LOG­GIA. A las opiniones vertidas entonces sobre la teoría del Restauro, añade sus reflexiones sobre la reprodu­cibilidad industrial de la obra de arte, la metodología de intervención en las obras de fábrica, las exclusiones de los conceptos de funcionalidad y dimensión artística de la intervención. En último lugar analiza en profundi­dad el alcance y la influencia que ha tenido el concepto de valor en todas sus facetas en el transcurso de la his­toria de la restauración.

 

 
Museo de la Ciencia en Cuenca
Authors: Pérez Arroyo Salvador
Published: June 2016

La reflexión sobre el valor de la ruina de la arquitectura como desveladora del alma constructiva de los edifi­cios, y el valor del soporte matérico de la arquitectura como medio y fin de la misma, sirven de preámbulo para explicar la concepción del proyecto del edificio para el Museo de la Ciencia de la Cuenca. Frente a una concepción de la ruina evocadora del paso del tiempo, el autor contrapone su noción como elemento positivo de acción para nuevos edificios.
Restauración de la imagen de Santa María. Portada norte de la Concatedral de Castellón
Authors: Roig Salom José Luis
Published: June 2016

La trágica demolición de la Iglesia de Santa María de Castellón trajo consigo la destrucción  de la imagen de la Virgen con el Niño que presidía el tímpano de la portada norte. Varios fragmentos recogidos enton­ces por un transeúnte han esperado más de cin­cuenta años para ver la luz, y constituirse en la base de un interesante ejercicio de anastilosis que ha devuelto al nuevo templo la imagen recuperada.
Particulate matter characterization of Cauca River water in Colombia
Authors: Gutiérrez Juan Pablo , van Halem Doris , Rietveld Luuk Cornelis
Published: June 2016

Abstract. The particulate matter composition in the Upper Cauca River section was studied, considering the importance of this river for the water supply of Cali, Colombia, and the implications that the turbidity of this water source has had for the city's water treatment. Additionally, the upstream Palo River was investigated, as this river is a major contributor to the Cauca River. River water samples were taken in both rivers in the period 2012–2014 during dry and rainy seasons. The origin of the particulate matter was studied through measurements of turbidity, total suspended solids (TSS), volatile suspended solids, particle size distribution, Fe3+, PO43−, NO3-N, chlorophyll-a, chemical oxygen demand, and true color. Turbidity and TSS values, measured during this survey, were highly variable, ranging from 25 to 465 NTU and 10 to 490 mg/L in the Cauca River, and from 30 to 840 NTU and 15 to 710 mg/L in the Palo River, respectively. High scattering was obtained in TSS and turbidity relationships in both rivers, potentially due to the different sources contributing to both parameters. It was concluded that the concentration of particulate matter depended merely on precipitation events in the Cauca and Palo River basins, leading to soil erosion due to extensive and intensive agricultural practices. In addition, the South Canal was identified as one of the main contributors to organic particulate matter.