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The purpose of this paper is to illustrate the new technical demands and reliability challenges to printed circuit board (PCB) designs, materials and processes when the transmission frequency increases from Sub-6 GHz in previous generations to millimeter (mm) wave in fifth-generation (5G) communication technology.

The approach involves theoretical analysis and actual case study by various characterization techniques, such as a stereo microscope, metallographic microscope, scanning electron microscope, energy dispersive spectroscopy, focused ion beam, high-frequency structure simulator, stripline resonator and mechanical test.

To meet PCB signal integrity demands in mm-wave frequency bands, the improving proposals on copper profile, resin system, reinforcement fabric, filler, electromagnetic interference-reducing design, transmission line as well as via layout, surface treatment, drilling, desmear, laminating and electroplating were discussed. And the failure causes and effects of typical reliability issues, including complex permittivity fluctuation at different frequencies or environments, weakening of peel strength, conductive anodic filament, crack on microvias, the effect of solder joint void on signal transmission performance and soldering anomalies at ball grid array location on high-speed PCBs, were demonstrated.

The PCB reliability problem is the leading factor to cause failures of PCB assemblies concluded from statistical results on the failure cases sent to our laboratory. The PCB reliability level is very essential to guarantee the reliability of the entire equipment. In this paper, the summarized technical demands and reliability issues that are rarely reported in existing articles were discussed systematically with new perspectives, which will be very critical to identify potential reliability risks for PCB in 5G mm-wave applications and implement targeted improvements.

This study aims to investigate the effect of leadership integrity on employees’ success. In this regard, the mediating role of ethical leadership and the moderating role of psychological capital and psychological empowerment were considered as well.

This study is an applied research and a descriptive-correlation survey that used quantitative data. Data were collected from 302 employees of a large factory in Iran who was selected randomly. The research questionnaire consisted of 54 statements and was distributed among the sample. Data was analyzed through confirmatory factor analysis and structural equation modeling.

The findings of this study show that leader integrity and ethical leadership have a positive effect on employees’ success and psychological capital and psychological empowerment moderate these effects. Moreover, leader integrity has an indirect effect on employees` success through employees’ perception of ethical leadership.

This study mainly contributes by explaining two sets of variables related to leaders’ behavior and employees’ cognitive competence which are complementary in improving employees’ potential success. The results highlight that leaders’ behavioral integrity can amplify ethical leadership which can ultimately leads to employees’ success if they have a high psychological empowerment and psychological capital.

This study aims to examine the role of blockchain technology (BCT) in trust in financial reporting (TFR) and the use of smart contracts (USC). It aims to ascertain the mediating role of USC in the relationship between BCT and TFR, thereby contributing to the limited empirical literature in this domain.

Based on a sample of the accountants’ familiarity with BCT, a structural equation model was constructed and analyzed using AMOS 24. The model proposes and tests relationships between BCT, USC and TFR.

The study highlights BCT’s significant positive influence on TFR, with USC mediating this effect. It provides empirical evidence that supports the transformative potential of BCT and USC in enhancing TFR.

These findings have significant implications for practitioners, regulatory bodies and policymakers. By highlighting the effectiveness of BCT and USC in fostering TFR, the study makes one aware of strategies to mitigate financial malpractices. It promotes the adoption of BCT in accounting practices.

This study addresses a gap in the literature by investigating the complex interplay of BCT, USC and TFR. It offers a unique perspective by exploring the mediating role of USC, thereby enhancing our understanding of the mechanisms through which BCT can foster TFR.

In the continuous development of high-speed railways, ensuring the safety of the operation control system is crucial. Electromagnetic interference (EMI) faults in signaling equipment may cause transportation interruptions, delays and even threaten the safety of train operations. Exploring the impact of disturbances on signaling equipment and establishing evaluation methods for the correlation between EMI and safety is urgently needed.

This paper elaborates on the necessity and significance of studying the impact of EMI as an unavoidable and widespread risk factor in the external environment of high-speed railway operations and continuous development. The current status of research methods and achievements from the perspectives of standard systems, reliability analysis and safety assessment are examined layer by layer. Additionally, it provides prospects for innovative ideas for exploring the quantitative correlation between EMI and signaling safety.

Despite certain innovative achievements in both domestic and international standard systems and related research for ensuring and evaluating railway signaling safety, there’s a lack of quantitative and strategic research on the degradation of safety performance in signaling equipment due to EMI. A quantitative correlation between EMI and safety has yet to be established. On this basis, this paper proposes considerations for research methods pertaining to the correlation between EMI and safety.

This paper overviews a series of methods and outcomes derived from domestic and international studies regarding railway signaling safety, encompassing standard systems, reliability analysis and safety assessment. Recognizing the necessity for quantitatively describing and predicting the impact of EMI on high-speed railway signaling safety, an innovative approach using risk assessment techniques as a bridge to establish the correlation between EMI and signaling safety is proposed.

Despite growing interest in misconduct spillovers – where unimplicated bystanders’ stock prices, reputations, resources, and opportunities are positively or negatively affected by others’ misconduct – theory about spillovers’ antecedents has largely focused on industry or product similarity, and has used the same characteristics to argue for both positive and negative spillovers. Furthermore, limited research has considered both positive and negative spillovers together, instead focusing on one kind of spillover or the other in isolation, thereby creating a lack of theoretical integration within the literature. In this chapter, we draw on attribution theory and expectancy violations theory to explain when and how misconduct incurs positive and negative spillovers. We argue that a spillover’s valence depends on the locus of attributions made by stakeholders, where the misconduct’s causes are attributed to the perpetrator alone (i.e., an isolated attribution) – resulting in positive spillovers – or the misconduct’s causes are perceived as indicative of a systemic problem shared among a broader set of organizations (i.e., a systemic attribution), leading to negative spillovers. We further suggest that the misconduct’s nature and misconduct prevalence within a perpetrator and among other firms influences stakeholders’ attributions, and ultimately the spillover’s valence. Our theory contributes to the organizational misconduct literature by providing a unifying theoretical framework to understand both positive and negative spillovers.

This research aims to examine the influence of brand signals (transparency, innovativeness and reputation) on brand trust and price fairness toward organic food restaurant brand.

The empirical data were gathered with the survey instrument from respondents who had previously visited organic food restaurant. The formulated hypotheses were analyzed with structural equation modeling.

The collected data demonstrated the positive effect of brand signals on brand trust and price fairness. Trust in organic food restaurant brand was found to positively impact both price fairness and brand loyalty. Additionally, the results provided evidence of the positive linkage between price fairness and brand loyalty. Among brand signals, brand transparency exerted the greatest impact on brand trust and price fairness. The findings also indicated the significant indirect linkage of brand signals on restaurant brand loyalty through brand trust and price fairness.

Through the lens of signaling theory and equity theory, this study provides novel insights into how brand signals contribute to brand trust, price fairness and organic food restaurant brand loyalty. The managerial implications for implementing brand strategies for organic food restaurants were discussed.

The design, fabrication and experimental validation of defected microstrip structure (DMS) are proposed to address the problem of near-end crosstalk (NEXT) and far-end crosstalk (FEXT) between the microstrip transmission lines in a printed circuit board.

The proposed DMS evolved with the combination of spur line (L-shaped DMS) and U-shaped DMS topologies. This technique reduces the strength of electromagnetic coupling and suppresses crosstalk by optimizing the capacitive and inductive coupling ratio between the linked microstrip lines. The practical inductance value is much more significant in DMS than in defected ground structures (DGS), but the capacitance value remains the same.

A DMS unit is etched on the aggressor microstrip line instead of the DGS circuit. Because there is no leakage via the ground plane and the circuit size is far smaller than with DGS, the enclosure issue is disregarded. DMS structures have a larger effective inductance and are resistant to electromagnetic interference. A tightly coupled transmission line structure with minimal separation between the coupled microstrip line is designed using DMS. Further research must be conducted to improve the NEXT, FEXT and spacing between the transmission lines.

Simulation and actual measurement results show that the proposed DMS structure can effectively suppress crosstalk by analysing the S-parameters, namely, S_12, S_13 and S_14, with measured values of 1.48 dB, 20.65 dB and 21.099 dB, respectively. The data rate is measured to be 1.34 Gbps as per the eye diagram characterization. The results show that the NEXT and FEXT are reduced by approximately 20 dB in the frequency range of 1–11 GHz for mixed signals. The substantial measured results in the vector network analyser coincide with the computer simulation technology microwave studio suite simulation results.

The purpose of this study is to fill the research gap by investigating the impact of brand social initiatives on both the warmth and competence dimensions of the brand, as well as examining the brand's potential to induce pro-environmental behavioral change among consumers.

The study employed a scenario-based survey design and surveyed 415 consumers in India. The data were analyzed using structural equation modeling (SEM) with SmartPLS 4.0.

The results show that social initiatives enhance both dimensions of social perception and increase cooperative intentions. Brand competence is more crucial than warmth in predicting behavioral intentions. Brand-cause fit, CSR commitment and initiatives' impact all influence the brand image. A brand's commitment to the cause is more significant than brand-cause fit in determining how consumers evaluate a brand.

This research provides insights into how social initiatives can enhance brand image and encourage helping intentions through effective communication traits. It can aid brands in building consumer trust, benefiting society and boosting finances. The study offers a framework for effective cause communication strategies, highlighting the importance of commitment to the cause over fitting with the brand's image to elicit desired responses.

This study is a novel attempt that uses the stereotype content model and costly signaling theory to explore how social initiatives influence a brand's warmth and competence and impact consumer behavior. It provides critical insights into the psychological mechanisms behind social initiatives' impact on consumer behavioral intentions.

The growth in cryptomarkets has reinvigorated the research on illicit drug distribution due to the availability of large-scale data. This data has enabled researchers to ask new and detailed questions about how participants in these markets trust each other enough for the market not to collapse. This question deserves more attention because it has become a taken-for-granted notion that repeated transactions and social categories create trust. Whether online or on the street, economic exchanges under illegality are more uncertain than transactions in the legal economy. This puts higher demands on trust, as there is less information and the stakes are higher. In this chapter, the author presents definitions, typologies, and disciplinary contributions to the study of trust and examine how it has been operationalised in a sample of 13 peer-reviewed articles. These articles focus on three dimensions of trust: process-based trust that derives from repeated transactions with known partners; character-based trust measured by the networked reputation scores; and institutional-based trust in the platform and its administrators. In practice, the trust bases are intertwined. Drawing on the broader social science literature on trust, a mesolevel operationalisation that centres on networked reputation scores as embedded in processes and institutions can draw the research together in a multidisciplinary framework.

The purpose of this paper is to design a suitable guard trace to reduce the electromagentic interference between two closely spaced high frequency transmission lines. A novel cross-shaped resonator combined via fence is passed down to alleviate far-end and near-end crosstalk (NEXT) in tightly coupled high-speed transmission lines. The distance between the adjacent transmission lines is increased stepwise as a function of trace width.

A rectangular-shaped resonator via fence is connected by a guard trace has been proposed to overcome the coupling between the traces that is separated by 2 W. Similarly, by creating a cross-shaped resonator via fence connected by guard trace that reduces the spacing further by 1.5 W.

A tightly coupled transmission line structure that needs separation by a designed unit cell structure. Further research needs to be conducted to improve the NEXT, far-end crosstalk (FEXT) and spacing between the transmission lines.

This study portrays a novel method that combines the resonators via fence with a minimum spacing between the tightly coupled transmission lines which reduce the NEXT and FEXT; thereby reducing the size of the routing area. The resultant test structures are characterized at high frequencies using time domain and frequency domain analysis. The following scattering parameters such as insertion loss, NEXT and FEXT of the proposed method are measured as 1.504 dB, >30 dB and >20 dB, respectively.