bluuebunny/crossref_metadata_2025_split huggingface dataset:
A partially delay‐dependent and disordered controller design for discrete‐time delayed systems
Authors: Wang Guoliang , Li Boyu , Zhang Qingling , Yang Chunyu 
Published: November 2016

SummaryThis paper considers the stabilization problem for a class of discrete‐time delayed systems by exploiting a partially delay‐dependent controller whose gains suffer a disordering phenomenon simultaneously. Two stochastic variables are used to describe the partially delay‐dependent and disordering properties, which are not independent, and referred to the original operation modes here. By introducing an augmented Markov chain, the corresponding closed‐loop system is transformed into a Markovian jump system with four new operation modes (NOMs). Based on the proposed model, a kind of controller depending on NOMs is firstly proposed with linear matrix inequalities forms. Moreover, without designing a controller containing NOMs directly, another kind of stabilizing controller referring to one depending on original operation modes is developed, which is composed of a series of NOM‐dependent controllers and satisfies a minimum variance approximation. Finally, two numerical examples are used to demonstrate the utility and superiority of the proposed methods. Copyright © 2016 John Wiley & Sons, Ltd.
State and input simultaneous estimation for discrete‐time switched singular delay systems with missing measurements
Authors: Lin Jinxing , Jiang Guoping , Gao Zhifeng , Rong Lina 
Published: November 2016

SummaryThis paper presents an approach to simultaneously estimating the states and inputs of discrete‐time linear switched singular state‐delayed systems with unknown inputs, multiple missing measurements, and average dwell time (ADT) switching. In each output measurement channel of the system, the data loss incident is controlled by an individual stochastic variable obeying a certain probability distribution on the interval [01]. The proposed approach is based on the design of a switched, loss‐probability‐dependent proportional integral observer under the ℓ2 input attenuation framework. By using piecewise Lyapunov function technique, ADT scheme, stochastic analysis, and projection lemma, sufficient conditions for the existence of such an observer are established in terms of linear matrix inequalities, which guarantee that the resulting estimation error system is stochastically exponentially admissible and achieves an (non‐weighted) ℓ2 gain from the augmented unknown input to the state and unknown input estimation errors under ADT switching. Moreover, a method is provided to seek the minimum allowable ℓ2 gain level for a desired ADT of the switching signals. The effectiveness of the proposed approach is illustrated by a simulation example of direct current (DC) servomechanism control system. Copyright © 2016 John Wiley & Sons, Ltd.
A Metalloprotein Inspired Ruthenium Complex as an Efficient and Reusable Catalyst for Selective Oxidation of Alcohols to their Corresponding Carbonyl Compounds
Authors: Jamatia Ramen , Gupta Ajay , Mahato Mrityunjoy , Patil Ranjit A. , Ma Yuan‐Ron , Pal Amarta K. 
Published: November 2016

AbstractMetalloprotein inspired self‐assembled ruthenium catalyst (3) was prepared from a linear amphiphilic polymer poly(N‐isopropylacrylamide‐co‐N‐vinylimidazole) (1) and ruthenium trichloride (2) via coordinative convolution. The ruthenium catalyst (3) was characterized using TEM, SEM, EDX, Powder XRD, TGA and XPS analysis. The polymer (1) was analysed using various characterization techniques such as FT‐IR, 1H and 13C NMR and GPC analysis. The prepared ruthenium catalyst (3) was highly stable, globular, highly active and reusable. The ruthenium catalyst in 863 mol ppm level (with respect to ruthenium) could catalyse the selective oxidation of various alcohol substrates efficiently within a short period of time. The catalyst could be separated by simple filtration and reused for another five consecutive runs without substantial loss in activity of catalyst or yield of product. The Turn over number (TON) and Turn over frequency (TOF) of the catalyst reached 1031 and 516 h‐1 respectively. An ICP‐AES analysis of the organic phase of the reaction revealed insignificant (0.709 ppm of Ru) leaching of the catalyst.
Preparation of 4,7‐Dihydro‐1H‐pyrazolo[3,4‐b]pyridine‐5‐nitriles in a Multicomponent Domino Process
Authors: Aggarwal Ranjana , Singh Gulshan , Kumar Suresh , McCabe Thomas , Rozas Isabel 
Published: November 2016

AbstractIn this article we present the unprecedented preparation of 4,7‐dihydro‐1H‐pyrazolo[3,4‐b]pyridine‐5‐nitriles and pyrazolo[3,4‐b]pyridine‐5‐nitrile derivatives by the reaction of mono‐substituted aryl/heteroarylhydrazines with 3‐aryl‐3‐oxopropanonitriles in ethanol in the presence of HNO3 (conc.). This multi‐component reaction requires the in situ oxidation of the ethanol (used as a solvent) to acetaldehyde, resulting in a domino assemblage of the starting materials. The resulting products were unambiguously and rigorously characterised based on IR, NMR (1D and 2D techniques), MS and X‐ray crystallography studies. Based on the results obtained from a series of reactions we also propose a mechanism for this unexpected synthesis which confirmed the involvement of in situ oxidation of ethanol and intermediacy of a 5‐aminopyrazole species.
Noble Gas Binding Ability of Metal‐Bipyridine Monocationic Complexes (Metal=Cu, Ag, Au): A Computational Study
Authors: Jana Gourhari , Saha Ranajit , Pan Sudip , Kumar Anand , Merino Gabriel , Chattaraj Pratim K. 
Published: November 2016

AbstractNoble gas (Ng) binding ability of monocationic M‐bipyridine (M=Cu, Ag, Au) complexes is investigated at the MPW1B95/cc‐pVTZ/cc‐pVTZ‐PP level. While the bond dissociation energy, enthalpy change, and free energy change for the dissociation process are computed to assess the efficacy of the Ng binding ability of these complexes, topological analysis of electron density, natural bond orbital, and energy decomposition analyses are carried out to characterize the nature of Ng−M bonds. The range of Ng−M dissociation energy values is within 5.8‐13.7 kcal/mol for Cu, 4.0‐12.0 kcal/mol for Ag, and 5.5‐19.7 kcal/mol for Au complexes with gradual increase in moving from Ar to Rn. For a given Ng, the Ng binding ability is highest for Au followed by Cu and Ag complexes, except for the Ar case. In all the cases, the Kr−Rn dissociation processes from the respective bound complexes are endergonic in nature at room temperature. The interaction between Ng and M centers are supported dominantly by orbital and ionic interactions with almost equal contribution. The partial covalent nature of Ng−M bonds is also reflected in the topological analysis of electron density.
Brønsted Acid Ionic Liquids (BAILs) as Efficient and Recyclable Catalysts in the Conversion of Glycerol to Solketal at Room Temperature
Authors: Gui Zhenyou , Zahrtmann Nanette , Saravanamurugan Shunmugavel , Reyero Ines , Qi Zhiwen , Bañares Miguel A. , Riisager Anders , Garcia‐Suarez Eduardo J. 
Published: November 2016

AbstractBrønsted acid ionic liquids (BAILs) have been prepared and applied for the first time ‐ to the best of our knowledge ‐ as efficient catalysts in the acetylation of glycerol with acetone to form solketal ((2,2‐dimethyl‐1,3‐dioxolan‐4‐yl)methanol) at very mild reaction conditions (room temperature) and short reaction times. The BAILs showed a superior catalytic performance in terms of both conversion and selectivity compared to the common mineral acid methanesulfonic acid as well as to other reported homogeneous and heterogeneous catalysts. Catalyst reusability was demonstrated with one of the BAILs (BAIL‐1), which was recovered and reused by a simple procedure in four consecutive reaction runs without any loss of catalytic activity and selectivity. Thus, the BAILs combine the advantages of both homogeneous and heterogeneous catalysis with respect to excellent conversion and selectivity as well as easy recyclability.
Methyl 1,2‐Orthoesters in Acid‐Washed Molecular Sieves Mediated Glycosylations
Authors: Uriel Clara , Rijo Patricia , Fernandes Ana S. , Gómez Ana M. , Fraser‐Reid Bert , López J. Cristóbal 
Published: November 2016

AbstractGlycosylation of alcohol derivatives with D‐mannose and D‐glucose derived methyl 1,2‐orthobenzoates can be promoted by commercially available acid‐washed 300 molecular sieves (AW‐MS), which functions both as promoter and as a drying agent in an operationally simple process. In this manner, glycosides can be obtained in good to excellent yields at room temperature, reflux, or under microwave (MW) heating. The usefulness of the process has been shown with the preparation of some diterpene glycosides.
Do foreign entrepreneurs benefit their firms as managers?
Authors: Kulchina Elena 
Published: November 2016

Research summary: The entrepreneurship literature has extensively studied an individual's decision to found a new venture, but it has little to say about the individual's choice to operate this venture personally or hire an agent. This decision is particularly challenging for foreign entrepreneurs, who, in addition to traditional factors, such as agency costs and personal preferences, need to take into consideration the benefits and liabilities of foreignness. Using novel data on foreign entrepreneurial firms and instrumenting for the owner‐manager choice with a visa policy change, we find that managing foreign entrepreneurs significantly improve firm performance. Our results further suggest that foreign owner‐managers reduce operating costs but have no effect on the firm's productivity and growth.Managerial summary: Immigrants represent a significant part of the population in the United States and Europe and are often more entrepreneurial than local nationals. However, a person starting a firm in a foreign country faces unique challenges. One important choice that a foreign entrepreneur has to make is whether to operate the firm personally or hire a local agent. Foreign entrepreneurs are often believed to be worse managers because they have limited local knowledge and skills. However, our results point to the contrary: We find that managing foreign entrepreneurs significantly improve firm performance by decreasing firms' operating costs. This happens because foreign owner‐managers often have access to unique resources, higher work incentives, and superior management skills acquired at home. Copyright © 2016 John Wiley & Sons, Ltd.
3D Graphene Frameworks/Co3O4 Composites Electrode for High‐Performance Supercapacitor and Enzymeless Glucose Detection
Authors: Bao Lin , Li Tao , Chen Shu , Peng Chang , Li Ling , Xu Qian , Chen Yashao , Ou Encai , Xu Weijian 
Published: November 2016

3D graphene frameworks/Co3O4 composites are produced by the thermal explosion method, in which the generation of Co3O4 nanoparticles, reduction of graphene oxide, and creation of 3D frameworks are simultaneously completed. The process prevents the agglomeration of Co3O4 particles effectively, resulting in monodispersed Co3O4 nanoparticles scattered on the 3D graphene frameworks evenly. The prepared 3D graphene frameworks/Co3O4 composites used as electrodes for supercapacitor display a definite improvement on electrochemical performance with high specific capacitance (≈1765 F g−1 at a current density of 1 A g−1), good rate performance (≈1266 F g−1 at a current density of 20 A g−1), and excellent stability (≈93% maintenance of specific capacitance at a constant current density of 10 A g−1 after 5000 cycles). In addition, the composites are also employed as nonenzymatic sensors for the electrochemical detection of glucose, which exhibit high sensitivity (122.16 µA mM
−1 cm−2) and noteworthy lower detection limit (157 × 10−9
M, S/N = 3). Therefore, the authors expect that the 3D graphene frameworks/Co3O4 composites described here would possess potential applications as the electrode materials in supercapacitors and nonenzymatic detection of glucose.
Assisting the continuous improvement of Scrum projects using metrics and Bayesian networks
Authors: Perkusich Mirko , Gorgônio Kyller Costa , Almeida Hyggo , Perkusich Angelo 
Published: November 2016

AbstractScrum is a simple process to understand, but hard to adopt. Therefore, there is a need for resources to assist on its adoption. In this paper, we present the process followed to build a Bayesian network to assist on the assessment of the quality of the software process in the context of Scrum projects. The model provides data to help Scrum Masters lead the improvement of business value delivery of Scrum teams. The process is divided into 2 phases. In the first phase, we built the Bayesian network based on expert knowledge extracted from the literature and experts. We used a top‐down approach and reasoning to define the key metrics necessary to build the models and their relationships. In the second phase, we updated the Bayesian network based on limitations of the first version. We validated the Bayesian network inferences with 10 simulated scenarios. Comparing both versions, for all scenarios, we improved the accuracy of the inferences. Therefore, we concluded that the Bayesian networks adequately represent Scrum projects from the viewpoint of the Scrum Master. Finally, the model built is in conformance with agile methods tailoring and can be adapted to any Scrum team.
Preparing work‐ready sonography trainees: An accelerated model of ultrasound training by the University of Auckland
Authors: Sim J. 
Published: November 2016

AbstractIntroductionNew Zealand is experiencing a national shortage of sonographers. The intense nature of clinical supervision negatively impacts on supervisor and workplace productivity thereby further exacerbating the workforce shortage. The University of Auckland piloted a new education initiative to prepare sonography trainees to be more ‘work ready’ and to reduce supervision burden of sonographers.MethodsTrainees attended a 12‐week intensive course on campus full time. The course focused on building sonographer core competencies, placing equal emphasis on the development of critical thinking and psychomotor skill of ultrasound scanning. An independent evaluator was appointed to determine the quality of the course and the impact of the trainees on supervision burden and workplace productivity.ResultsTrainees were reported to be 6 to 9 months ahead of students who did not undergo the 12‐week intensive course. The clinical supervision burden was reduced without compromising on quality of clinical practice.DiscussionThis new education initiative represents a departure from the traditional model by having trainees to commence their initial training full time at the university. With the successful conclusion of the pilot study, both public and private sectors currently jointly contribute to the funding of the intensive course.
Modelling a family of systems for crisis management with concern‐oriented reuse
Authors: Alam Omar , Kienzle Jörg , Mussbacher Gunter 
Published: November 2016

SummaryConcern‐oriented reuse (CORE) proposes the concern as a new unit of model‐based reuse encapsulating software artefacts pertaining to a domain of interest that span multiple development phases and levels of abstraction. With CORE, a concern encapsulates multiple reusable features, while allowing its generic models to be customized to problem‐specific contexts. We report on our experience of designing a family of crisis management systems (CMS) with the help of reusable concern libraries. The collected metrics show a considerable amount of reuse in our CMS design. The study provides encouraging evidence that CORE's vision to create large‐scale, generic and reusable entities that are expressed with the most appropriate modelling formalisms at the right level of abstraction is feasible. We present our experience in the design of the CMS and elaborate on the advantages as well as the efforts required to adopt CORE in an industrial setting. Copyright © 2016 John Wiley & Sons, Ltd.
On the first‐order and buckling behaviour of thin walled regular polygonal tubes
Authors: Gonçalves Rodrigo , Camotim Dinar 
Published: November 2016

AbstractThis paper summarizes the work carried out in the context of an ongoing investigation that aims to understand and characterize the structural behaviour of thin‐walled single‐cell regular convex polygonal section (RCPS) tubes, such as those widely employed in the steel construction industry. In particular, the first‐order and buckling (bifurcation) behaviours are addressed and it is shown that they

exhibit several peculiarities, stemming essentially from the cross‐section rotational symmetry, and
can be significantly influenced by distortion‐type deformation.
The analytical and numerical results reported in this paper are obtained using generalized beam theory (GBT) and its computationally efficient specialization for RCPS recently developed by the authors [1]. In particular, the unique modal decomposition features of GBT make it possible to

identify the most relevant cross‐section deformation modes,
draw valuable conclusions concerning the mechanics of the problem under consideration from the analysis of the (modal) solution, and
develop analytical and semi‐analytical formulae for problems of significant practical interest.
Cyclic behaviour of external diaphragm joint to CHS column with built‐in replaceable links
Authors: Khador Majd , Chan Tak‐Ming 
Published: November 2016

AbstractA series of full‐scale laboratory experiments was conducted to investigate the cyclic behaviour of an external diaphragm joint between a steel I‐beam and a circular hollow section column. The joint incorporated two diaphragm plates (DPs) welded to the column's external wall and bolted to the flanges of the beam using tapered cover plates (TCPs). The joint was designed to limit yielding and plastic hinging of the TCPs while the other joint components remained elastic. This is necessary if the joint is to qualify for use in structures classified in the damage control structural performance range according to FEMA 356. Two parameters of the TCPs are investigated in this paper: steel grade and bolt preload force. The use of higher steel grades was found to impose undesirable higher strain demands on the beam and DPs and dissipate less energy than the joints with the lower grade. A controlled reduction in the bolt preload force allowed connection slippage to occur beyond the serviceability limit, created an additional energy dissipation fuse and allowed rotation of the plastic hinge region to exceed the 25 mrad required for medium ductility class structures.
Concise Review: Geminin—A Tale of Two Tails: DNA Replication and Transcriptional/Epigenetic Regulation in Stem Cells
Authors: Patmanidi Alexandra L. , Champeris Tsaniras Spyridon , Karamitros Dimitris , Kyrousi Christina , Lygerou Zoi , Taraviras Stavros 
Published: November 2016

Abstract
Molecular mechanisms governing maintenance, commitment, and differentiation of stem cells are largely unexploited. Molecules involved in the regulation of multiple cellular processes are of particular importance for stem cell physiology, as they integrate different signals and coordinate cellular decisions related with self-renewal and fate determination. Geminin has emerged as a critical factor in DNA replication and stem cell differentiation in different stem cell populations. Its inhibitory interaction with Cdt1, a member of the prereplicative complex, ensures the controlled timing of DNA replication and, consequently, genomic stability in actively proliferating cells. In embryonic as well as somatic stem cells, Geminin has been shown to interact with transcription factors and epigenetic regulators to drive gene expression programs and ultimately guide cell fate decisions. An ever-growing number of studies suggests that these interactions of Geminin and proteins regulating transcription are conserved among metazoans. Interactions between Geminin and proteins modifying the epigenome, such as members of the repressive Polycomb group and the SWI/SNF proteins of the permissive Trithorax, have long been established. The complexity of these interactions, however, is only just beginning to unravel, revealing key roles on maintaining stem cell self-renewal and fate specification. In this review, we summarize current knowledge and give new perspectives for the role of Geminin on transcriptional and epigenetic regulation, alongside with its regulatory activity in DNA replication and their implication in the regulation of stem and progenitor cell biology.
Expression Analysis of the Stem Cell Marker Pw1/Peg3 Reveals a CD34 Negative Progenitor Population in the Hair Follicle
Authors: Besson Vanessa , Kyryachenko Sergiy , Janich Peggy , Benitah Salvador A. , Marazzi Giovanna , Sassoon David 
Published: November 2016

Abstract
Pw1/Peg3 is a parentally imprinted gene expressed in adult stem cells in every tissue thus far examined including the stem cells of the hair follicle. Using a Pw1/Peg3 reporter mouse, we carried out a detailed dissection of the stem cells in the bulge, which is a major stem cell compartment of the hair follicle in mammalian skin. We observed that PW1/Peg3 expression initiates upon placode formation during fetal development, coincident with the establishment of the bulge stem cells. In the adult, we observed that PW1/Peg3 expression is found in both CD34+ and CD34− populations of bulge stem cells. We demonstrate that both populations can give rise to new hair follicles, reconstitute their niche, and self-renew. These results demonstrate that PW1/Peg3 is a reliable marker of the full population of follicle stem cells and reveal a novel CD34− bulge stem-cell population.
Mesenchymal Stem Cell-Derived Microvesicles Modulate Lipopolysaccharides-Induced Inflammatory Responses to Microglia Cells
Authors: Jaimes Yarúa , Naaldijk Yahaira , Wenk Kerstin , Leovsky Christiane , Emmrich Frank 
Published: November 2016

Abstract
Microglia cells are the central nervous system immune cells and have been pointed out as the main mediators of the inflammation leading to neurodegenerative disorders. Mesenchymal stromal cells (MSCs) are a heterogeneous population of cells with very high self-renewal properties and uncomplicated in vitro culture. Research has shown that MSCs have the capacity to induce tissue regeneration and reduce inflammation. Studies demonstrated that MSCs have complex paracrine machineries involving shedding of cell-derived microvesicles (MVs), which entail part of the regulatory and regenerative activity of MSCs, as observed in animal models. We proposed MSC-derived MVs as potent regulators of microglia activation and used an in vitro model of stimulation for BV-2 cells, a microglia cell line, with lipopolysaccharides (LPS). Here we demonstrated that presence of MSCs-derived MVs (MSC-MVs) prevents Tumor necrosis factor-α, Interleukin (IL)−1β and IL-6 upregulation by BV-2 cells and primary microglia cells toward LPS. Also, inducible isoform of nitric oxide synthases and Prostaglandin-endoperoxide synthase 2 upregulation were hampered in presence of MSC-MVs. Higher levels of the M2 microglia marker chemokine ligand-22 were detectable in BV-2 cells after coculture with MSC-MVs in presence and absence of LPS. Moreover, upregulation of the activation markers CD45 and CD11b by BV-2 cells was prevented when cocultured with MSC-MVs. Furthermore, MSC-MVs suppressed the phosphorylation of the extracellular signal kinases 1/2, c-Jun N-terminal kinases and the p38 MAP kinase (p38) molecules. Consequently, MSC-MVs might represent a modulator of microglia activation with future therapeutic impact.