bluuebunny/crossref_metadata_2025_split huggingface dataset:
TheArabidopsisbHLH Transcription Factors MYC3 and MYC4 Are Targets of JAZ Repressors and Act Additively with MYC2 in the Activation of Jasmonate Responses
Authors: Fernández-Calvo Patricia , Chini Andrea , Fernández-Barbero Gemma , Chico José-Manuel , Gimenez-Ibanez Selena , Geerinck Jan , Eeckhout Dominique , Schweizer Fabian , Godoy Marta , Franco-Zorrilla José Manuel , Pauwels Laurens , Witters Erwin , Puga María Isabel , Paz-Ares Javier , Goossens Alain , Reymond Philippe , De Jaeger Geert , Solano Roberto 
Published: February 2011

AbstractJasmonates (JAs) trigger an important transcriptional reprogramming of plant cells to modulate both basal development and stress responses. In spite of the importance of transcriptional regulation, only one transcription factor (TF), the Arabidopsis thaliana basic helix-loop-helix MYC2, has been described so far as a direct target of JAZ repressors. By means of yeast two-hybrid screening and tandem affinity purification strategies, we identified two previously unknown targets of JAZ repressors, the TFs MYC3 and MYC4, phylogenetically closely related to MYC2. We show that MYC3 and MYC4 interact in vitro and in vivo with JAZ repressors and also form homo- and heterodimers with MYC2 and among themselves. They both are nuclear proteins that bind DNA with sequence specificity similar to that of MYC2. Loss-of-function mutations in any of these two TFs impair full responsiveness to JA and enhance the JA insensitivity of myc2 mutants. Moreover, the triple mutant myc2 myc3 myc4 is as impaired as coi1-1 in the activation of several, but not all, JA-mediated responses such as the defense against bacterial pathogens and insect herbivory. Our results show that MYC3 and MYC4 are activators of JA-regulated programs that act additively with MYC2 to regulate specifically different subsets of the JA-dependent transcriptional response.
12-Oxo-Phytodienoic Acid Accumulation during Seed Development Represses Seed Germination inArabidopsis
Authors: Dave Anuja , Hernández M. Luisa , He Zhesi , Andriotis Vasilios M.E. , Vaistij Fabián E. , Larson Tony R. , Graham Ian A. 
Published: February 2011

AbstractArabidopsis thaliana COMATOSE (CTS) encodes an ABC transporter involved in peroxisomal import of substrates for β-oxidation. Various cts alleles and mutants disrupted in steps of peroxisomal β-oxidation have previously been reported to exhibit a severe block on seed germination. Oxylipin analysis on cts, acyl CoA oxidase1 acyl CoA oxidase2 (acx1 acx2), and keto acyl thiolase2 dry seeds revealed that they contain elevated levels of 12-oxo-phytodienoic acid (OPDA), jasmonic acid (JA), and JA-Ile. Oxylipin and transcriptomic analysis showed that accumulation of these oxylipins occurs during late seed maturation in cts. Analysis of double mutants generated by crossing cts with mutants in the JA biosynthesis pathway indicate that OPDA, rather than JA or JA-Ile, contributes to the block on germination in cts seeds. We found that OPDA was more effective at inhibiting wild-type germination than was JA and that this effect was independent of CORONATINE INSENSITIVE1 but was synergistic with abscisic acid (ABA). Consistent with this, OPDA treatment increased ABA INSENSITIVE5 protein abundance in a manner that parallels the inhibitory effect of OPDA and OPDA+ABA on seed germination. These results demonstrate that OPDA acts along with ABA to regulate seed germination in Arabidopsis.
Proteomics and Functional Analyses of Pepper Abscisic Acid–Responsive 1 (ABR1), Which Is Involved in Cell Death and Defense Signaling
Authors: Choi Du Seok , Hwang Byung Kook 
Published: February 2011

Abstract
Abscisic acid (ABA) is a key regulator of plant growth and development, as well as plant defense responses. A high-throughput in planta proteome screen identified the pepper (Capsicum annuum) GRAM (for glucosyltransferases, Rab-like GTPase activators, and myotubularins) domain-containing ABA-RESPONSIVE1 (ABR1), which is highly induced by infection with avirulent Xanthomonas campestris pv vesicatoria and also by treatment with ABA. The GRAM domain is essential for the cell death response and for the nuclear localization of ABR1. ABR1 is required for priming cell death and reactive oxygen species production, as well as ABA-salicylic acid (SA) antagonism. Silencing of ABR1 significantly compromised the hypersensitive response but enhanced bacterial pathogen growth and ABA levels in pepper. High levels of ABA in ABR1-silenced plants antagonized the SA levels induced by pathogen infection. Heterologous transgenic expression of ABR1 in Arabidopsis thaliana conferred enhanced resistance to Pseudomonas syringae pv tomato and Hyaloperonospora arabidopsidis infection. The susceptibility of the Arabidopsis ABR1 putative ortholog mutant, abr1, to these pathogens also supports the involvement of ABR1 in disease resistance. Together, these results reveal ABR1 as a novel negative regulator of ABA signaling and suggest that the nuclear ABR1 pool is essential for the cell death induction associated with ABA-SA antagonism.
Analysis of causes of decohesion of a gas turbine blade made of EI 867‐WD alloy
Authors: Błachnio Józef 
Published: February 2011

PurposeThe purpose of this paper is to present results of laboratory testing work on causes of a service failure/damage to an aircraft turbojet's gas‐turbine blade made of the EI 867‐WD alloy.Design/methodology/approachThe tests comprised comparing the microstructure of a service‐damaged blade with microstructures of specimens drawn from a similar all‐new blade, both subjected to temperatures of different values for different annealing times.FindingsFindings based on the comparison of experimentally gained results of microstructure examination of both the gas‐turbine blades were: the change in the microstructure of a damaged blade results from the growth and cuboidal‐to‐lamellar change of shape of the reinforcing phase γ′ (Ni3Al); and the size and shape of this phase are comparable to those of the phase γ′ of a new blade subjected to annealing at temperature exceeding 1,223 K for 1 h. The results gained allowed for drawing the conclusion that the damaged turbine blade was operated in the exhaust‐gas temperature exceeding the maximum permissible value of 1,013 K for approximately 1 h in the course of an air mission.Research limitations/implicationsThe comparison‐oriented experimental testing work was carried out on a new blade manufactured in the way and from material identical to those of the damaged blade. The applied methodology enables us to gain qualitative results of investigating into the causes of a failure/damage to a gas‐turbine blade.Practical implicationsThe presented methodology of identifying (origin‐finding of) a service‐induced damage to a gas‐turbine blade proves helpful in the case of an engine failure, when information on the operating conditions thereof is insufficient.Originality/valueThe paper is an original work by the authors. To the best of their knowledge, the issue has not been found in the literature, approached in this particular way. It has been based on research work on air accidents due to the service‐induced failures/damages to gas‐turbine blades in aircraft turbojet engines.
A new approach to air traffic controller workload measurement and modelling
Authors: Oktal Hakan , Yaman Kadriye 
Published: February 2011

PurposeThe purpose of this paper is to develop an analytical approach for workload measurement based on the task times and the changing task priorities of en route air traffic controllers (EATC).Design/methodology/approachA model called Total Airspace Workload Measurement Model was developed to measure EATC workload. Turkish airspace was chosen for practical application of the model. A survey was conducted of EATC to calculate the weighting coefficients and times of different tasks defined in the model. The survey results were analyzed with SPSS 15.0. The real traffic data of Turkish airspace for two peak hours period in heavy traffic covering August 2007 was provided by the General Directorate of Turkish airports. Geomedia 6.0 was employed for the visualization of the real traffic data.FindingsThe total airspace workload during two peak hours of traffic, estimated reference sector capacity and the number of operational sector were defined and calculated to analyze the distribution of workload among sectors.Practical implicationsThis study can be used for en route sector design such as decision of the number of operational sectors and planning of sectors capacity in the strategic level. Air traffic control service providers can also refer to this study for human resources and equipment planning.Originality/valueA number of parameters and variables were defined and included in the model by taking into consideration the different service types provided by EATC. All parameters and variables were identified with the task times of the controller. This analytical approach can be applied to those particular airspaces which have different characteristics.
Evaluating MI512: an information literacy course for PhD students
Authors: Secker Jane , Macrae‐Gibson Rowena 
Published: February 2011

PurposeThe purpose of this paper is to provide an overview of a six‐week information literacy course for research students that was redesigned following the librarians undertaking the Postgraduate Certificate in Teaching in Higher Education.Design/methodology/approachThe paper presents a case study and evaluation of the impact of a teaching programme. Findings – Research students appreciate and value the expertise of library staff and are prepared to devote considerable time to an information literacy programme. The programme received excellent feedback.Research limitations/implicationsThere is no summative assessment associated with the course and so no quantitative measure of improvement in learning.Originality/valueThe paper provides a model programme other librarians can adapt for use at their own institution. Extended doctoral level information literacy courses are relatively uncommon and demonstrates the benefit of this type of course, to research.
Library education in Greece: history, current status and future prospects
Authors: Gerolimos Michalis 
Published: February 2011

PurposeThe purpose of this paper is to report the history of the Greek Library Science (LS) education, to document proposed and current programmes of study and to evaluate the current under‐graduate and post‐graduate status of library studies in Greece.Design/methodology/approachThe research methodology is based on bibliographic research of papers and articles and the documentation of programmes of study of Greek schools of LS.FindingsThe paper traces the history of library education in Greece with an emphasis on the suggested or implemented curricula over a period of five decades, documents the social conditions that affected the establishment of tertiary library education and proposes some changes to be implemented in schools of LS.Originality/valueThe paper records and evaluates the official library programmes of study over a period of time that covers all the course of formal library education in Greece. These programmes are not always documented in official records. Furthermore, statistical data regarding the library students of all Greek schools of LS are presented.
New trends and future applications/directions of institutional repositories in academic institutions
Authors: Jain Priti 
Published: February 2011

PurposeThe purpose of this paper is to review the recent literature about institutional repositories (IRs) including the benefits and possible obstacles of setting up an IR. It will also discuss librarians' and authors' participative roles and open access. In conclusion, the paper aims to consider the future of IRs and finally makes recommendations for their successful implementation in academic institutions.Design/methodology/approachThis paper is based on the recently published literature discussing current trends in IRs; although, some historical reference is also necessary to provide background to the open access movement and the early development of IRs. Given that the paper is an account of the history and current status of IRs, a formal documented methodology is not applicable.FindingsThe discussion suggests that in spite of all the obstacles to successful implementation, including associated negative perceptions, IRs have been increasingly recognised as a vital tool for scholarly communication and an important source of institutional visibility and a viable source of institutional knowledge management.Research limitations/implicationsThis paper is an expression of opinion about current trends and future applications of IRs. It is not based on any formal methodology. This paper will be useful for librarians, academic staff and academic institutions generally, especially in developing countries where IRs are still in a developmental stage. Therefore, some of the general recommendations may not be as relevant for those institutions with well‐established and flourishing IRs.Practical implicationsThe paper is aimed at institutions with low‐use repositories. It can be used to persuade management to establish institutional policies and it can also be helpful in clarifying the role of the library. It is also aimed at institutions considering initial development of an IR. The paper outlines the implications for IR practice for different groups, namely authors, librarians and academic administrative staff. It could, therefore, be used to persuade and influence different sets of stakeholders at institutions with under‐populated or embryonic IRs, about the value of open access, the importance of depositing material and the potential functionality afforded by IR packages.Originality/valueThe paper provides a review of the status of IRs and brings together topics previously reported on in isolation.
The future of open access in Croatia: a survey of academic and research libraries
Authors: Hebrang Grgic Ivana , Barbaric Ana 
Published: February 2011

PurposeThe purpose of this research paper is to present Croatian librarians' awareness about the importance of institutional open access (OA) repositories.Design/methodology/approachThe research is based on an online questionnaire sent to all the Croatian research and academic libraries. Online questionnaire was chosen as the most appropriate tool, as the authors wanted it to be anonymous and as quick as possible.FindingsThe findings indicate that all the academic librarians in Croatia are aware of the importance of institutional OA repositories. The number of OA repositories in Croatia is rather small, but the librarians are making lots of efforts towards the development of new repositories. Croatian librarians think that the most appropriate software is open‐source software; that OA repositories have to be open access initiative protocol for metadata harvesting compliant; that copyright owner's consent for archiving is necessary. The biggest problems are the lack of administration support and the researchers' unawareness of the benefits of OA, especially OA repositories.Practical implicationsBased on this research, some steps regarding OA could be done on a national level, e. g. guidelines for establishing OA repositories could be created and the obligation of self‐archiving should be regulated. This research could be a valuable tool for developing new OA repositories.Originality/valueThe paper contributes to the understanding the OA movement in transitional countries and peripheral scientific communities. The knowledge created in such countries can be beneficial for the global scientific community, and OA repositories are valuable way for promoting that knowledge.
Academic library non/low use and undergraduate student achievement
Authors: Goodall Deborah , Pattern David 
Published: February 2011

PurposeThis paper aims to report an ongoing investigation of library use at Huddersfield University that has identified a historical correlation between library usage and degree classification.Design/methodology/approachThree sets of data – use of electronic resources, book loans, and visits to the library – when represented graphically show consistent amounts of no and low use at campus, academic school, degree‐type and course level. Combining these findings with data showing academic achievement raises the question: is there a positive correlation between library use and attainment?FindingsUnderstandably, library usage varies between academic schools and there are often pedagogic reasons for low usage, but it would appear that, in some subjects, students who “read” more, measured in terms of borrowing books and accessing electronic resources, achieve better grades.Research limitations/implicationsFurther work will focus on undergraduate, fulltime students at the main university campus.Practical implicationsIt is intended to discover the reasons behind non/low use so as to develop then trial effective interventions for improving the grades of all students, from the bottom up, rather than just supporting those that are already high flyers. The results will inform both library service delivery and university goals concerning the quality of the student learning experience, improving retention and improving the level of final degree award.Originality/valueThe paper shows that there are implications for all subjects and all levels of achievement at the university.
Changing scenario of librarianship in Pakistan: managing with the challenges and opportunities
Authors: Ameen Kanwal 
Published: February 2011

PurposeThis paper intends to throw light on major challenges and opportunities the twenty‐first century has brought to librarianship due to the emerging academic culture, and growing use of information and communication technologies (ICTs) in Pakistan.Design/methodology/approachThe content is based on the literature, personal communication with national and foreign peers, the writer's 25 years' experience, observation and research in the field of librarianship.FindingsLibraries in developing countries are being significantly affected by the ongoing ICT developments from basic infrastructure to collections to services to needed human resources. All quarters of the community need vision and preparedness to turn challenges into opportunities, and instead of being chaotic make change that is productive for society and themselves. It appeared that the overall growth in librarianship is much better since the dawn of the twenty‐first century.Originality/valueThe new aspects discussed in the context of Pakistan may provide guidelines for future planning, and growth of professional and libraries. It is assumed that the situation is similar to other developing countries. So, the work will be useful in creating awareness among professionals of other countries.
Real‐time solving of dynamic problem in industrial robots
Authors: Rosillo Nuria , Valera Angel , Benimeli Francesc , Mata Vicente , Valero Francisco 
Published: February 2011

PurposeThe purpose of this paper is to present the development and validation of a methodology which allows modeling and solving the inverse and direct dynamic problem in real time in robot manipulators.Design/methodology/approachThe robot dynamic equation is based on the Gibbs‐Appell equation of motion, yielding a well‐structured set of equations that can be computed in real time. This paper deals with the implementation and calculation of the inverse and direct dynamic problem in robots, with an application to the real‐time control of a PUMA 560 industrial robot provided with an open control architecture based on an industrial personal computer.FindingsThe experimental results show the validity of the dynamic model and that the proposed resolution method for the dynamic problem in real time is suitable for control purposes.Research limitations/implicationsThe accuracy of the applied friction model determines the accuracy of the identified overall model and consequently of the control. This is especially obvious in the case of the PUMA 560 robot, in which the presence of friction is remarkable in some of their joints. Hence, future work should focus on identifying a more precise friction model. The robot model could also be extended by incorporating rotor dynamics and could be applied for different robot configurations as parallel robots.Originality/valueGibbs‐Appell equations are used in order to develop the robotic manipulator dynamic model, instead of more usual dynamics formulations, due to several advantages that these exhibit. The obtained non‐physical identified parameters are adapted in order to enable their use in a control algorithm.
Uncalibrated eye‐in‐hand visual servoing: an LMI approach
Authors: Khan Umer , Jan Ibrar , Iqbal Naeem , Dai Jian 
Published: February 2011

PurposeThe purpose of this paper is to present the control of six degrees of freedom (PUMA560) robotic arm using visual servoing, based upon linear matrix inequality (LMI). The aim lies in developing such a method that neither involves camera calibration parameters nor inverse kinematics. The approach adopted in this paper includes transpose Jacobian control; thus, inverse of the Jacobian matrix is no longer required. By invoking the Lyapunov's direct method, closed‐loop stability of the system is ensured. Simulation results are shown for three different cases, which exhibit the system stability and convergence even in the presence of large errors.Design/methodology/approachThe paper presents LMI‐based visual servo control of PUMA560 robotic arm.FindingsThe proposed method is implementable in the dynamic environment due to its independence to camera and object model.Research limitations/implicationsVisibility constraint is not included during servoing – this may cause features to leave the camera field of view (fov).Originality/valueLMI optimization is employed for visual servo control in an uncalibrated environment. Lyapunov's direct method is utilized which ensures system stability and convergence.
Dynamic role engine and formation control for cooperating agents with robust decision‐making algorithm
Authors: Hamidreza Kasaei S. , Mohammadreza Kasaei S. , Alireza Kasaei S. , Amirhassan Monadjemi S. 
Published: February 2011

PurposeIn a soccer robot game, the environment is highly competitive and dynamic. In order to work in the dynamically changing environment, the decision‐making system of a soccer robot system should have the features of flexibility and real‐time adaptation. The purpose of this paper is to focus on the middle‐size soccer robot league (MSL) and present new hierarchical hybrid fuzzy methods for decision making and action selection of an MSL robot.Design/methodology/approachIn this paper, new hierarchical hybrid fuzzy methods for decision making and action selection of a robot in MSL are presented. First, the behaviors of an agent are introduced, implemented and classified in two layers, the low‐level behaviors and the high‐level behaviors. In the second layer, a two‐phase mechanism for decision making is introduced. In phase one, some useful methods are implemented which check the robot's situation for performing required behaviors. In the next phase, the team strategy, team formation, robot's role and the robot's positioning system are introduced. A fuzzy logical approach is employed to recognize the team strategy and furthermore to tell the player the best position to move.FindingsThis methodology was implemented on the ADRO RoboCup Team and ADRO team performance 2008 was compared with its previous version 2007. The results showed the success of this methodology; the team performance in coordination and collaboration highly improved; in fact, the players switched their strategic area smoothly as the team strategy changed in a reasonable manner, the robots carried out the high‐level behaviors much more efficiently and the final results were enhanced significantly.Originality/valueThis paper is a result of the authors' original research work in the field of autonomous robot‐middle size soccer robot, supported by Islamic Azad University – Khorasgan Branch, Isfahan, Iran.