57 research outputs found
Cohomology and Deformations of left-symmetric Rinehart Algebras
Full text linkWe introduce a notion of left-symmetric Rinehart algebras, which is a generalization of a left-symmetric algebras. The left multiplication gives rise to a representation of the corresponding sub-adjacent Lie-Rinehart algebra. We construct left-symmetric Rinehart algebra from O-operators on Lie-Rinehart algebra. We extensively investigate representations of a left-symmetric Rinehart algebras. Moreover, we study deformations of left-symmetric Rinehart algebras, which is controlled by the second cohomology class in the deformation cohomology. We also give the relationships between O-operators and Nijenhuis operators on left-symmetric Rinehart algebras.arXiv admin note: text overlap with arXiv:1710.03749, arXiv:1312.6526, arXiv:1808.01909 by other author
A novel, machine learning-based feature extraction method for detecting and localizing bearing component defects
No full textVibration analysis for conditional preventive maintenance is an essential tool for the industry. The vibration signals sensored, collected and analyzed can provide information about the state of an induction motor. Appropriate processing of these vibratory signals leads to define a normal or abnormal state of the whole rotating machinery, or in particular, one of its components. The main objective of this paper is to propose a method for automatic monitoring of bearing components condition of an induction motor. The proposed method is based on two approaches with one based on signal processing using the Hilbert spectral envelope and the other approach uses machine learning based on random forests. The Hilbert spectral envelope allows the extraction of frequency characteristics that are considered as new features entering the classifier. The frequencies chosen as features are determined from a proportional variation of their amplitudes with the variation of the load torque and the fault diameter. Furthermore, a random forest-based classifier can validate the effectiveness of extracted frequency characteristics as novel features to deal with bearing fault detection while automatically locating the faulty component with a classification rate of 99.94%. The results obtained with the proposed method have been validated experimentally using a test rig
Improvement of Method Queues by Progress of the Piezoresistive Accelerometer Parameters
No full textIn this paper the queues are used as a method to improve maintenance performance. The information collected by vibration analysis is used to check the system status and see whether a maintenance operation is to be organized. Thus, for a precise decision, the improvement of accelerometer parameters is required. In order to solve this issue, the piezoresistive accelerometer step and impulse responses are enhanced by using appropriate parameters (damping rate and frequency range). Computer simulation tests were conducted to confirm this approach. The obtained results have shown the difference between the accelerometer with the proposed parameters and the accelerometer used in the experiment. It can be concluded that the proposed parameters provide stable and accurate accelerometer.</jats:p
Enhanced Linear State Observer–Based PLL-Less Vector-Oriented Control Method for a Three-Phase PWM Rectifier
No full textIn practical three-phase PWM rectifiers, external disturbances, such as changes in load and grid voltage, and internal disturbances, such as DC capacitor uncertainty, have caused major problems, including DC-link voltage fluctuations, harmonic distortion, and power factor degradation. They can also cause problems with power balance, stability, system dynamics, reduced efficiency, and increased stress. This paper proposes an enhanced linear state observer (ELSO) with a PLL-less voltage-oriented control (PLL-less VOC) method for a three-phase PWM rectifier in the synchronous coordinate frame (dq coordinate), aiming to simultaneously improve the DC-link voltage dynamics, disturbance rejection ability, and the grid current control loop’s transient response. The ELSO is suggested instead of the load current sensor not only to estimate the disturbance but also to estimate the overall switching losses of the PWM rectifier, resulting in good DC-link voltage disturbance rejection and transient fluctuation suppression, high robustness against DC capacitance change, low size and cost, and high reliability. Furthermore, contrary to the traditional VOC method, where the PLL and Park transforms are important parts for controlling the rectifier in the dq coordinate, the PLL-less VOC method can control the grid currents directly in the dq coordinate without needing PLL and Park transforms, which can offer a fast transient response and low computational burden. The frequency domain analysis of the ELSO is used to identify its gains and enhance its stability and disturbance rejection capability. Finally, hardware-in-the-loop (HIL) simulation using the OPAL-RT 4510 real-time simulator is also given to confirm the superiority and efficacy of the suggested control method
Use of Poultry By-product and Plant Protein Sources in Diets of Redclaw (Cherax quadricarinatus)
Full text linkA total of 300 juvenile crayfish (13.0 +/- 0.03 g) were randomly distributed among 5 dietary groups (n=60, 3 replicates) held within 15 x 500 L-1 fiberglass tanks connected to a recirculation system (RAS), at 20 crayfish per tank. Each group was fed for 12 weeks one of five experimental diets where the main protein sources were: 1) control, fish-meal-based diet (FM, 48% of the diet); 2) 10% FM + 52.5% poultry by-product meal (PoM); 3) 34.5% soybean meal + 34.5% corn gluten meal (Pmix); 4) 34.5% PoM + 32.soybean/corn gluten meal mix (PoM/Pmix); and 5) 10% FM + 27.5% soybean + 27.5% corn gluten meal (FM/Pmix). The results demonstrated that there were no significant differences among diets in terms of growth and feed utilization efficiency. Muscle amino acid profile of redclaw crayfish fed the FM diet had the highest level of total essential amino acids, followed by FM/PMix, Pmix, PoM/Pmix, and PoM diets. Particularly, in all experimental groups, the highest essential amino acids (EAA) were lysine, arginine, and leucine. Based on these findings, we conclude that redclaw can perform well with FM-free vegetable diets and PoM-based diets although more research is needed into the total composition of EAA and FA in muscle.Scientific Research Project Unit of Cukurova University, Turkey [FBA-2016-6642]; Scientific and Technologic Research Council of Turkey-TUBITAK [1059B211601103]This study was supported by the Scientific Research Project Unit of Cukurova University, Turkey (Grant Number: FBA-2016-6642). The author Dr. Mabrouk Elsabagh received financial grant from the Scientific and Technologic Research Council of Turkey-TUBITAK (Grant Number: 1059B211601103)
The Relationship between Workplace Incivility Behaviors and Nurses' Intention to Share Knowledge
No full textAbstract: Workplace incivility behaviors poisoning the organizational climate disrupts the working harmony of health care team and impairs interprofessional communication and collaboration. Aim: To examine the relationship between workplace place incivility behaviors and nurses' intention to share knowledge at Itay El-Baroud General Hospital. Methods: A descriptive, correlational research design was utilized in all inpatient medical, surgical and critical care units at Itay El-Baroud General hospital, El-Beheira, Egypt, for all head nurses and their assistants and staff nurses. Tools: two tools were used: Tool Ι: Nursing Incivility Scale (NIS) and a demographic characteristics data sheet; Tool Π: Intention to Share Knowledge Questionnaire. Results: staff nurses got moderate mean percent score for both workplace incivility and intention to share knowledge. Moreover, the first source of incivility was general environment; and the last one was patient/visitor. Whereas; the first dimension for nurses’ intention to share knowledge was attitude toward knowledge sharing, and the last dimension was anticipated extrinsic rewards. Conclusion: There are negative highly significant correlations between total workplace incivility behaviors and all its dimensions and total nurses’ intention to share knowledge and all its dimensions. Recommendations: Develop and disseminate workplace incivility policy; develop positive workplace culture; and provide incentives and rewards.
Keywords: Workplace incivility behaviors, Intention to share knowledge, Head nurses, Staff nurses.
Title: The Relationship between Workplace Incivility Behaviors and Nurses' Intention to Share Knowledge
Author: Asmaa Mohamed Elsayed Taha, Reem Mabrouk Abd El Rahman, Heba Mohamed Alanwar Ashour
International Journal of Novel Research in Healthcare and Nursing
ISSN 2394-7330
Vol. 10, Issue 1, January 2023 - April 2023
Page No: 8-21
Novelty Journals
Website: www.noveltyjournals.com
Published Date: 09-January-2023
DOI: https://doi.org/10.5281/zenodo.7515934
Paper Download Link (Source)
https://www.noveltyjournals.com/upload/paper/The%20Relationship%20between%20Workplace-09012023-5.pdfInternational Journal of Novel Research in Healthcare and Nursing, ISSN 2394-7330, Novelty Journals, Website: www.noveltyjournals.co
Relationship between Nurses' Emotional Intelligence and Their Organizational Citizenship Behaviors
No full textAbstract: Emotional Intelligence (EI) has been related to a number of positive work outcomes including organizational citizenship behaviors (OCBs). It seems that organizational behavior of each nurse is strongly influenced by EI. Aim: To determine the relationship between nurses’ EI and their organizational citizenship behaviors. Methods: A descriptive, correlational research design was utilized in all inpatient medical, surgical and critical care units at Kafr El-Dawar General hospital, El-Beheira, Egypt, for all staff nurses who will be available at the time of data collection .Tools: two tools were used: Tool Ι: Wong and Law EI Scale (WLEIS) and a demographic characteristics data sheet; Tool Π: Organizational Citizenship Behavior (OCB) Scale. Results: Staff nurses have moderate mean percent score of total EI and have high mean percent score of total OCB. Also, there are positive highly significant relationships between total EI and its dimensions and total OCB and its dimensions. Conclusion: there was highly statistically positive relationship between total EI of the nurses and their organizational citizenship behaviors at Kafr El-Dawar General hospital. Recommendations: Study the impact of managers’ leadership style on nursing staff perception of OCB.
Keywords: Emotional Intelligence, Organizational Citizenship Behavior, WLIES.
Title: Relationship between Nurses' Emotional Intelligence and Their Organizational Citizenship Behaviors
Author: Nahed Samir kozmel, Reem Mabrouk Abd El Rahman, Wafaa Hassan Mostafa
International Journal of Novel Research in Healthcare and Nursing
ISSN 2394-7330
Vol. 10, Issue 3, September 2023 - December 2023
Page No: 14-27
Novelty Journals
Website: www.noveltyjournals.com
Published Date: 06-September-2023
DOI: https://doi.org/10.5281/zenodo.8321297
Paper Download Link (Source)
https://www.noveltyjournals.com/upload/paper/Relationship%20between%20Nurses-06092023-2.pdfInternational Journal of Novel Research in Healthcare and Nursing, ISSN 2394-7330, Novelty Journals, Website: www.noveltyjournals.co
THE SELF VERSUS THE OTHER IN NADINE GORDIMERS NOVEL THE PICK UP: A CULTURAL APPROACH
Full text linkNadine Gordimer, the Nobel prize winning South African author, deals with the complexities of “the Other” in most of her novels. She has grown up in a post-colonial South Africa and lived through the various stages of its apartheid regime. One of her main concerns was to analyze the impact of this discriminating “the other” on people and their culture
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