A wideband single-fed, circularly-polarized patch antenna with enhanced axial ratio bandwidth for RFID reader application is proposed. The antenna consists of a modified half E-shaped patch, a ...near-field resonant parasitic (NFRP) patch, and four rotated vertical metallic plates on the ground plane. The metallic plates surrounding the main radiator of the modified half E-shaped patch antenna are fabricated vertically on the ground plane. The operating frequency of the antenna decreases substantially with the vertical metallic plates, which is important for miniaturization of RFID applications. With an elliptical slot and a cut on the modified half E-shaped patch, antenna impedance bandwidth and CP performance both improve. A truncated corner patch as an NFRP element can generate an additional CP radiation mode and further enhances the axial ratio and impedance bandwidth. The measured results show that the antenna has an impedance bandwidth of 14.2% (833-960 MHz), a 3-dB AR bandwidth of 9.0% (846-926 MHz), and an average gain of 7.3 dBic over a 3-dB AR bandwidth. The proposed antenna has a compact size and a low profile (<inline-formula> <tex-math notation="LaTeX">0.45\lambda _{0}\times 0.45\lambda _{0}\times 0.074\lambda _{0} </tex-math></inline-formula>).
A novel application of interior search optimizer (ISO) to define the necessary parameters to model solid-oxide fuel cells (SOFCs) for further studies is presented. Sum of mean squared error (SMSE) is ...used to formulate the objective function to be optimized by the ISO subject to the validity of predefined constraints. The current study is carried out into two phases: i) under steady-state; various case studies under various operating conditions are demonstrated, and ii) at later stage, scenarios for transient performance of a SOFC system are investigated. In the same context, MATLAB/SIMULINK is used to implement the proposed ISO-based method. A standard proportional-integral (PI)-controller is engaged to the dynamic model to improve its performance during transient disturbances. Transient responses of the stack current and voltage are analyzed due to load changes. Additionally, the hydrogen and oxygen flow rates along hydrogen utilization are investigated. For all test cases, detailed comparisons to other competing recent algorithms such as satin bowerbird algorithm, grasshopper optimizer and genetic algorithm are made to validate the numerical results. It can be emphasized that the comparisons along other demonstrations indicate the viability of the proposed ISO-based method in defining the unknown parameters of the SOFCs efficiently.
•Steady-state and dynamic behaviours of SOFC system are investigated.•The proposed methodology is based on interior search optimization algorithm.•Various case studies are demonstrated with necessary validations.•PI-controller to improve the dynamic responses of SOFC system is proposed.
Manufacturers increasingly involve external technology experts (ETEs) from suppliers in collaborative R&D projects. Through their innovative work behavior (IWB), these temporary employees help to ...creatively solve manufacturers' engineering problems. Previous literature suggests that organizational identification should be an important driver of ETEs' IWB, but the intricacy of ETEs is that they may identify with both the supplier and the manufacturer. Past studies on multiple identification do not account for the frictions or synergies that are fundamental to collaborative innovation settings, and which may alter the role of identification with either organization. In response, this study considers the interactive and nonlinear associations of ETEs' dual identification with their IWB, and also investigates the moderating role of ETEs' extent of involvement in the manufacturer's R&D project. Using moderated multilevel polynomial regression on single‐informant survey data from 186 ETEs, we find support for a linear association of identification congruence: as both supplier identification and manufacturer identification are high, ETEs' IWB is also high. Moreover, we find an inverted U‐shape pattern of identification incongruence: as identification with one organization exceeds identification with the other, ETEs' IWB is lower than when both identifications have a comparable level. The congruence pattern is weaker for ETEs with high involvement (i.e., those individuals active in all innovation stages), while the incongruence pattern is stronger for these ETEs. Remarkably, our analyses indicate that the lowest IWB value for high involvement ETEs is found at a combination of low supplier identification and high manufacturer identification, a point where low involvement ETEs in fact report the highest levels of IWB. Together these findings extend literatures on multiple organizational identification and external contributions in open innovation processes, and also provide valuable insights to managers working in collaborative R&D settings.
In the present study, we examined satisfaction with life (SWL), group identifications, perceived discrimination, and socio-economic status among immigrants and stayers. The study had two main ...objectives: 1) to test the morbidity and salutary hypotheses of immigration by comparing the psycho-social characteristics of immigrants and stayers; 2) to test a resource model of well-being among immigrants and stayers by investigating the effect of different resources and stressors on SWL. The study was conducted using a random representative sample of first-generation immigrants from the Former Soviet Union to Israel (n = 400) and a not-random large and geographically dispersed sample of Jews staying in Russia (n = 935). The comparison of immigrants and stayers revealed that immigration is a mixed blessing, salutary in some aspects and onerous in others. In general, immigrants were more satisfied with their life than stayers. In addition, identification with the country of residence was stronger among immigrants than stayers. However, immigrants reported a higher level of perceived discrimination, and their socio-economic status was lower than that of stayers. Socio-economic status, identification with the country of residence, and perceived discrimination were directly connected to SWL among immigrants and stayers. In addition, among stayers, identification with the ethnic minority group was connected to SWL, while among immigrants, identification with the country of origin was not connected to SWL. Socio-economic status and perceived discrimination also affected SWL indirectly, through their connections to identification with the country of residence among immigrants and stayers and through their connection to ethnic identification among stayers.
We systematically explored the differences between workgroup and organizational identifications. To obtain an understanding of multiple identifications on the basis of social identity, ...self-categorization, and social projection theories, we reviewed the literature and distinguished
between workgroup and organizational identifications in 3 ways: First, the development of workgroup and organizational identifications was found to be based on self-anchoring and self-stereotyping mechanisms, respectively. Second, workgroup and organizational identifications served members'
personalized and depersonalized belongingness motives, respectively. Finally, organizational identification played a distal role in influencing job satisfaction through workgroup identification. Implications of the findings are discussed.
Effective resource management produces good performance. Organizations that want to achieve goals must properly utilize and manage their resources. This research was conducted to determine what ...factors influence the Organizational Citizenship Behavior of teachers and education personnel at Madrasah Aliyah Negeri in Mataram city. This study uses a quantitative descriptive method with a sample of 95 respondents, the entire population of teachers and education personnel at MAN Mataram City. The analysis used is factor analysis with the Guttman scale. It can be concluded that the factors that influence Organizational Citizenship Behavior dominantly in teachers and education personnel are; factors of job satisfaction, motivation, organizational culture, and gender.
The aim of this article is to state the importance of sociability and circulation through territory by children in relation to certain apprenticeships related to the progressive development of ...abilities, skills and knowledge necessary for the future production and social reproduction and the construction of social identifications. Following this aim I will focus on the ethnographic analysis of the daily practices of a group of children mbya and criollos in Misiones, Argentina. I will consider the ethnic question and focus on the appropriation of the division between relatives and non-relatives that occurs among the first years of life.
Untargeted lipidomics is increasingly popular due to the broad coverage of lipid species. Data dependent MS/MS acquisition is commonly used in order to acquire sufficient information for confident ...lipid assignment. However, although lipids are identified based on MS/MS confirmation, a number of false positives are still observed. Here, we discuss several causes of introducing lipid false identifications in untargeted analysis. Phosphotidylcholines and cholesteryl esters generate in-source fragmentation to produce dimethylated phosphotidylethanolamine and free cholesterol. Dimerization of fatty acid results in false identification of fatty acid ester of hydroxyl fatty acid. Realizing these false positives is able to improve confidence of results acquired from untargeted analysis. Besides, thresholds are established for lipids identified using LipidSearch v4.1.16 software to reduce unreliable results.
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•Discuss orbitrap-based untargeted lipidomics platform.•Establish the thresholds for lipid identification using LipidSearch v.4.1.16 software.•Confirm the false identifications of in-source fragmentation.•Confirm the false identification of fatty acid dimerization.
•Single and multiple cracks identification in plate structures.•Proper Orthogonal Decomposition (POD).•Radial Basis Functions (RBF).•eXtended IsoGeometric Analysis (XIGA).
An inverse algorithm based ...on Proper Orthogonal Decomposition (POD) and Radial Basis Functions (RBF) for single and multiple cracks identification in plate structures is presented. The inverse analyses combine experimental fracture mechanics tests with numerical models based on the eXtended IsoGeometric Analysis (XIGA) method. The proposed technique identifies the location of cracks in a plate using static strains as input data. Simple and powerful algorithms, namely Jaya and Cuckoo search algorithms are coupled with the proposed XIGA-POD-RBF technique. The objective function is expressed as the difference between the strains of the actual cracks and those of the estimated ones. It is found that the proposed methodology is able to accurately estimate the cracks' locations with high accuracy and much faster than other techniques used in the literature. The stability of the identification algorithm based on Jaya is tested against measurement uncertainty by introducing a white Gaussian noise in the input data. The results show high stability for noise levels up to 4%.
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