Compatible Operators Research Articles

A critical discourse analysis of the link between professional culture and organisational culture

PurposeDespite the fundamental role of culture in an organisational setting, little is known of how organisational culture can be sometimes determined/influenced by professional culture, particularly in the global south. Using Nigeria as a research focus, this article uses critical discuss analysis to examine the link between professional and organisational culture.Design/methodology/approachThis study uses qualitative research approach to establish the significance of professional culture as a determinant of organisational culture among healthcare organisations.FindingsWe found that the medical profession in Nigeria is replete with professional duties and responsibilities, such as professional values and beliefs, professional rules and regulations, professional ethics, eagerness to fulfil the Hippocratic Oath, professional language, professional symbols, medicine codes of practice and societal expectations, all of which conflate to form medical professionals' values, beliefs, assumptions and the shared perceptions and practices upon which the medical professional culture is strongly built. This makes the medical professional culture stronger and more dominant than the healthcare organisational culture.Research limitations/implicationsThe extent to which the findings of this research can be generalised is constrained by the limited and selected sample of the research.Practical implicationsThe primacy of professional culture over organisational culture may have dysfunctional consequences for human resource management (HRM), as medical practitioners are obliged to stick to medical professional culture over human resources practices. Hence, human resources departments may struggle to cope with the behavioural issues that arise due to the dominant position taken by the medical practitioners. This is because the cultural system (professional culture), which is the configuration of beliefs, perceived values, code of ethics, practices and so forth. shared by medical doctors, subverts the operating system. Therefore, in the case of healthcare organisations, HRM should support and enhance the cultural system (the medical professional culture) by offering compatible operating strategies and practices.Originality/valueThis article provides valuable insights into the link between professional culture and organisational culture. It also enriches debates on organisational culture and professional culture. We, therefore, contend that a strong professional culture can overwhelm and eventually become an organisational culture.

Embedding of locally compact Hausdorff topological gyrogroups in topological groups

A topological gyrogroup is a topological space endowed with a compatible nonassociative operation, which shares several common properties with topological groups. In this article, we prove that every locally compact Hausdorff topological gyrogroup G can be embedded in a completely regular topological group Γ as a twisted subset. We also study properties shared by them by proving that G has property ▪ if and only if Γ has property ▪, where ▪ is one of the following properties: connectedness, path connectedness, and separability.

Hamiltonian operators and related differential-algebraic Balinsky-Novikov, Riemann and Leibniz type structures on nonassociative noncommutative algebras

We review main differential-algebraic structures \ lying in background of \ analytical constructing multi-component Hamiltonian operators as derivatives on suitably constructed loop Lie algebras, generated by nonassociative noncommutative algebras. The related Balinsky-Novikov and \ Leibniz type algebraic structures are derived, a new nonassociative "Riemann" algebra is constructed, deeply related with infinite multi-component Riemann type integrable hierarchies. An approach, based on the classical Lie-Poisson structure on coadjoint orbits, closely related with those, analyzed in the present work and allowing effectively enough construction of Hamiltonian operators, is also briefly revisited. \ As the compatible Hamiltonian operators are constructed by means of suitable central extentions of the adjacent weak Lie algebras, generated by the right Leibniz and Riemann type nonassociative and noncommutative algebras, the problem of their description requires a detailed investigation both of their structural properties and finite-dimensional representations of the right Leibniz algebras defined by the corresponding structural constraints. \ Subject to these important aspects we stop in the work mostly on the structural properties of the right Leibniz algebras, especially on their derivation algebras and their generalizations. We have also added a short Supplement within which we \ revisited \ the classical Poisson manifold approach, closely related to our construction of \ Hamiltonian operators, generated by nonassociative and noncommutative algebras. In particular, \ we presented its natural and simple generalization allowing effectively to describe a wide class\ of Lax type integrable nonlinear Kontsevich type Hamiltonian systems on associative noncommutative algebras.

Joker: Elastic stream processing with organic adaptation

This paper addresses the problem of auto-parallelization of streaming applications. We propose an online parallelization optimization algorithm that adjusts the degree of pipeline and data parallelism in a joint manner. We define an operator development API and a flexible parallel execution model to form a basis for the optimization algorithm. The operator interface unifies the development of different types of operators and makes operator properties visible in order to enable safe optimizations. The parallel execution model splits a data flow graph into regions. A region contains the longest sequence of compatible operators that are amenable to data parallelism as a whole and can be further parallelized with pipeline parallelism. We also develop a stream processing run-time, named Joker, to scale the execution of streaming applications in a safe, transparent, dynamic, and automatic manner. This ability is called organic adaptation. Joker implements the runtime machinery to execute a data flow graph with any parallelization configuration and most importantly change this configuration at run-time with low cost in the presence of partitioned stateful operators, in a way that is transparent to the application developers. Joker continuously monitors the run-time performance, and runs the optimization algorithm to resolve bottlenecks and scale the application by adjusting the degree of pipeline and data parallelism. The experimental evaluation based on micro-benchmarks and real-world applications showcase that our solution accomplishes elasticity by finding an effective parallelization configuration.

Organic data centers: A sustainable solution for computing facilities

Abstract In the present perspective article we provide an overview of on-going work in the literature and possible future development of organic data centers (ODC). These are defined as the combined operation of a data center and a greenhouse, and given their compatible thermal and operation requirements, ODCs have the potential to provide an excellent solution in terms of sustainability. In particular, we identify possible positive impacts of ODCs on at least 5 of the 17 United Nations (UN) Sustainable Development Goals (SDGs), including SDGs 2 and 13 on zero hunger and climate change, respectively.

Introducing two complementary novel algebraic operations: Matrix-separation and Matrices-joining for programming evaluation and development

Abstract In the last decade, many computer science disciplines have been manipulating large amounts of data like artificial neural networks, data recognition, data mining and big data. Recently, many programmers and application designers have relied on the matrices in their algorithms to handle large numbers of data simultaneously to enriching the parallelism for their systems. However, due to the growth of the data amount in the matrices, there is a need to reshaping these matrices according to the capabilities of the computer systems that are processing these data. Consequently, our idea is developing algebraic operations that can represent the reshaping of matrices within the mathematical equations. In this paper, we develop fully two novel compatible algebraic matrices operations to solve this problem. The first operation called “Matrix-Separation” and the second operation denoted by “Matrices-Joining”. These two novel operations assist the programmers and scientists to perform their programs evaluations and developments.

Compatibility complexes of overdetermined PDEs of finite type, with applications to the Killing equation

In linearized gravity, two linearized metrics are considered gauge-equivalent, , when they differ by the image of the Killing operator, . A universal (or complete) compatibility operator for K is a differential operator K1 such that and any other operator annihilating K must factor through K1. The components of K1 can be interpreted as a complete (or generating) set of local gauge-invariant observables in linearized gravity. By appealing to known results in the formal theory of overdetermined PDEs and basic notions from homological algebra, we solve the problem of constructing the Killing compatibility operator K1 on an arbitrary background geometry, as well as of extending it to a full compatibility complex Ki (), meaning that for each Ki the operator Ki+1 is its universal compatibility operator. Our solution is practical enough that we apply it explicitly in two examples, giving the first construction of full compatibility complexes for the Killing operator on these geometries. The first example consists of the cosmological FLRW spacetimes, in any dimension. The second consists of a generalization of the Schwarzschild–Tangherlini black hole spacetimes, also in any dimension. The generalization allows an arbitrary cosmological constant and the replacement of spherical symmetry by planar or pseudo-spherical symmetry.

Performance analysis and optimization for maximum exergy efficiency of a geothermal power plant using gravitational search algorithm

The limited energy resources globally, low efficiency of renewable energies, complicated and costly energy conversion systems and environmental pollution have significantly increased scholar’s interest in innovative and efficient systems and their improvement studies. Therefore, it is necessary to increase the efficiency of power generation systems used in geothermal sources of medium or low enthalpy. This study aims to improve the thermodynamic performance of an existing binary geothermal system with organic Rankine cycle and its system components while trying to comprehend the physical events/changes during these improvement processes. A model has been developed that simulates the system completely and accurately. Seventeen system parameters which were considered as crucial to maximize the exergy efficiency of the system like turbine inlet, condenser temperature and so on, are optimized using a gravitational search algorithm. The results of the study show that the exergy efficiency of the system is 14% and thus it can be maximized to 31% with optimization. During the optimization process, the pressure of work fluid on the evaporator line is increased and thus 2.1 MW more power is produced compared to normal power production. The condenser, with the highest exergy destruction in the system, has performance improvements of 75%. As a result, with the optimization process, a more compatible operating strategy between system components is ensured. This will allow the system and its components to run for longer and without failures.

Some super systems with local bi-Hamiltonian operators

For a class of super skew-symmetric operators with eight parameters, two kinds of super Hamiltonian operators are identified by the method of functional multi-vectors. Appropriate decompositions of these operators lead to compatible super Hamiltonian pairs which in turn produce nonlinear super bi-Hamiltonian systems from the trivial x-translation flow. As examples, besides the super Korteweg–de Vries equations and other known ones, new super generalizations are obtained for the Riemann equation, the Hunter–Saxton equation and the Camassa–Holm equation, all of them admit two compatible local super Hamiltonian operators.

Integrated all-optical wavelength and polarization conversion of orbital angular momentum carrying modes.

Wavelength division multiplexing (WDM) using higher-order spatial modes such as orbital angular momentum (OAM) through a channelized bandwidth provides enhanced capacity communication systems. An all-optical wavelength converter is a key function in implemented WDM networks to overcome the wavelength contentions. In addition, a polarization converter provides efficient control on the state of polarization for encoded data channels in the optical networks. This paper proposes a novel versatile-designed integrated optical device with Ycut ridge lithium niobate photonic wire configuration that acts as a wavelength or polarization converter for data modulated on OAM. It is schemed in such a way that generates decomposed guided modes with a new wavelength and polarization via cascaded second harmonic generation/difference frequency generation (cSHG/DFG) and type-II DFG nonlinear interactions, respectively, where their desired relative phase is achieved by a linear electro-optical effect in the successive phase shifter part. The low loss ≤0.09 dB/cm, high purity (≥94%), and low voltage (≤4 V) of the high-speed proposed modulator enable its compatible operation in commercial wireless and fiber-based polarization-multiplexed WDM communication systems.

Metamaterial-based energy harvesting for GSM and satellite communication frequency bands

A metamaterial-based energy harvesting structure has been designed and experimentally tested in this study. The proposed structure has square and split ring resonators placed in different angles on the back and front sides for compatible multiband operation in energy harvesting. Resonance points have been defined at 900 MHz, 1.37 GHz, 1.61 GHz, 1.80 GHz, and 2.55 GHz, by simulation and experimental methods. These points correspond to Global System for Communication (GSM) 900, GSM 1800, Universal Mobile Telecommunication System (UMTS), satellite navigation, and Industrial Scientific and Medical (ISM) band frequencies. Supporting multiband application in a single structure without changing dimensions or design is one of the properties of this study. To harvest captived electromagnetic energy, an HSMS 2860 Schottky diode has been used. For wireless power transmission efficiency, voltage across the Schottky diode has been measured by a spectrum analyzer in different points experimentally. The maximum obtained voltage across the Schottky diode is 90 mV at 1800 MHz when a 500 mV signal is applied from a 5 cm distance. Simulated and experimental results prove that the proposed structure can effectively be used in GSM, satellite communication, and UMTS electromagnetic bands for energy harvesting and filtering applications.

Low‐cost quad‐band dual antipodal Vivaldi antenna using microstrip to CPS transition

AbstractIn this article, a new topology of antenna for multi‐band application is proposed, designed, and characterized. This one is based on an array of two antipodal Vivaldi antennas diametrically placed and fed through a microstrip to coplanar strip (CPS) transition, which generates an odd‐order coupling at the input of the elements. The designed antenna was built on a low‐cost substrate (FR‐4), with compatible operation at 1.85–2.00, 2.20–2.85, 3.35–3.81, and 5.00–6.9 GHz (PCS, Bluetooth, WLAN, WiMAX, TD‐SCDMA, and ISM). The measurements, on a fabricated prototype, and the simulations demonstrate the operability and functionality, with satisfactory performance, of the proposed antenna topology.

Exploring the combinatorial space of complete pathways to chemicals.

Computational pathway design tools often face the challenges of balancing the stoichiometry of co-metabolites and cofactors, and dealing with reaction rule utilization in a single workflow. To this end, we provide an overview of two complementary stoichiometry-based pathway design tools optStoic and novoStoic developed in our group to tackle these challenges. optStoic is designed to determine the stoichiometry of overall conversion first which optimizes a performance criterion (e.g. high carbon/energy efficiency) and ensures a comprehensive search of co-metabolites and cofactors. The procedure then identifies the minimum number of intervening reactions to connect the source and sink metabolites. We also further the pathway design procedure by expanding the search space to include both known and hypothetical reactions, represented by reaction rules, in a new tool termed novoStoic. Reaction rules are derived based on a mixed-integer linear programming (MILP) compatible reaction operator, which allow us to explore natural promiscuous enzymes, engineer candidate enzymes that are not already promiscuous as well as design de novo enzymes. The identified biochemical reaction rules then guide novoStoic to design routes that expand the currently known biotransformation space using a single MILP modeling procedure. We demonstrate the use of the two computational tools in pathway elucidation by designing novel synthetic routes for isobutanol.

New polyhedral discretisation methods applied to the Richards equation: CDO schemes in Code_Saturne

This paper shows an application of a vertex-based Compatible Discrete Operator (CDO) scheme to simulate the Richards equation on meshes using polyhedral cells. Second order spatial accuracy is reached for a verification test case using two meshes made of different types of polyhedral cells. A second validation test case dealing with a variably saturated soil inside a vertical column has been simulated, with three advected passive pollutants being released. Results are in good agreement with the reference for both types of mesh. MPI scalability has also been assessed at scale up to 98,304 cores of a Cray X30 for a 1.7 B cell mesh for the simulation of the aforementioned case, and nearly linear speed-up is observed. Finally the implementation of hybrid MPI-OpenMP has been tested on 2 types of Intel Xeon Phi Knights Landing co-processors, showing that the best configuration for the code is obtained when all the physical cores are filled by MPI tasks and the 4 hyperthreads by OpenMP threads.

Freeform additive manufacturing by vari-directional vari-dimensional material deposition

PurposeThe purpose of this paper is to propose and demonstrate a new additive manufacturing approach that breaks the layer-based point scanning limitations to increase fabrication speed, obtain better surface finish, achieve material flexibility and reduce equipment costs.Design/methodology/approachThe freeform additive manufacturing approach conceptually views a 3D article as an assembly of freeform elements distributed spatially following a flexible 3D assembly structure, which conforms to the surface of the article and physically builds the article by sequentially forming the freeform elements by a vari-directional vari-dimensional capable material deposition mechanism. Vari-directional building along tangential directions of part surface gives surface smoothness. Vari-dimensional deposition maximizes material output to increase build rate wherever allowed and minimizes deposition sizes for resolution whenever needed.FindingsProcess steps based on geometric and data processing considerations were described. Dispensing and forming of basic vari-directional and vari-dimensional freeform elements and basic operations of joining them were developed using thermoplastics. Forming of 3D articles at build rates of 2-5 times the fused deposition modeling (FDM) rate was demonstrated and improvement over ten times was shown to be feasible. FDM compatible operations using 0.7 mm wire depositions from a variable exit-dispensing unit were demonstrated. Preliminary tests of a surface finishing process showed a result of 0.8-1.9 um Ra. Initial results of dispensing wax, tin alloy and steel were also shown.Originality/valueThis is the first time that both vari-directional and vari-dimensional material depositions are combined in a new freeform building method, which has potential impact on the FDM and other additive manufacturing methods.

Bi-Hamiltonian structures of KdV type**To Franco Magri on the occasion of his 70th birthday, with friendship and admiration.

Combining an old idea of Olver and Rosenau with the classification of second and third order homogeneous Hamiltonian operators we classify compatible trios of two-component homogeneous Hamiltonian operators. The trios yield pairs of compatible bi-Hamiltonian operators whose structure is a direct generalization of the bi-Hamiltonian pair of the KdV equation. The bi-Hamiltonian pairs give rise to multi-parametric families of bi-Hamiltonian systems. We recover known examples and we find apparently new integrable systems whose central invariants are non-zero; this shows that new examples are not Miura-trivial.

Research on the development and preliminary application of Beijing agricultural sci-tech service hotline WebApp in agricultural consulting services

To deal with the “last kilometer” problem during the agricultural science and technology information service, we analyzed the feasibility, necessity and advantages of WebApp applied to agricultural information service and discussed the modes of WebApp used in agricultural information service based on the requirements analysis and the function of WebApp. To overcome the existing App’s defects of difficult installation and weak compatibility between the mobile operating systems, the Beijing Agricultural Sci-tech Service Hotline WebApp was developed based on the HTML and JAVA technology. The WebApp has greater compatibility and simpler operation than the Native App, what’s more, it can be linked to the WeChat public platform making it spread easily and run directly without setup process. The WebApp was used to provide agricultural expert consulting services and agriculture information push, obtained a good preliminary application achievement. Finally, we concluded the creative application of WebApp in agricultural consulting services and prospected the development of WebApp in agricultural information service.

Compatible Hamiltonian operators for the Krichever–Novikov equation

It has been proved by Sokolov that Krichever–Novikov equation's hierarchy is hamiltonian for the Hamiltonian operator H0=ux∂−1ux and possesses two weakly non-local recursion operators of degrees 4 and 6, L4 and L6. We show here that H0, L4H0 and L6H0 are compatible Hamiltonians operators for which the Krichever–Novikov equation's hierarchy is hamiltonian.

Study of Nb and NbN Resonators at 0.1 K for Low-Noise Microwave SQUID Multiplexers

The quality factors and noise performances of superconducting resonators play an important role in microwave SQUID multiplexer (MW-MUX). Since we develop microwave SQUID multiplexer for transition edge sensor arrays, the operation temperature is around 100 mK where the effects of two level system (TLS) can be significant. In this paper, we have investigated the electrode-material or wafer dependence of noise performance of MW-MUX by characterizing four types of resonators. Although the temperature dependence of resonance frequency and the power dependence of ${{\boldsymbol{Q}}_{\boldsymbol{u}}}$ show clear difference among the materials, frequency noises which contribute the readout noise of MW-MUX are similar. Theoretical model predicts that not TLS but other loss dominates ${{\boldsymbol{Q}}_{\boldsymbol{u}}}$ in the power region suitable for the low-noise operation of our MW-MUX. Further, the estimated flux noise calculated from the measured frequency noise and the conversion coefficient from frequency to flux were 1–5 $({{{\mathbf \mu }}{{{\mathbf \Phi }}_0}/\sqrt {{{\mathbf Hz}}} })$ @ 1 Hz, 0.2–0.8 $({{{\mathbf \mu }}{{{\mathbf \Phi }}_0}/\sqrt {{{\mathbf Hz}}} })$ @ 3 kHz. These results indicate the noise of our MW-MUX has small material dependence and the compatible low noise operation to typical dc SQUIDs would be possible. Therefore, the MW-MUX with our materials would not suffer from the low frequency noise due to TLS.

Relatively compatible operations in BCK-algebras and some related algebras

Fil: Lubomirsky, Noemi. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnologico Conicet - La Plata; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Departamento de Matematicas; Argentina