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To maintain the well integrity, the strength and sealing ability of premium connection should be in the safe scope. ISO 13679 is widely used for evaluating the ability of tubing and casing connection all over the world. FE is adopted to simulate the ISO 13679 tests.

Because of the disadvantage of experiment such as long period, high cost and high requirement on the facility, considering the convenience and universality of finite element method, as well as the contacting nonlinearity and material nonlinearity, three-dimensional finite element model of a certain type of premium connection is established with the consideration of helix angle. The loads exerted on the premium connection are the loads in series B test and thermal cycle test of ISO 13679. The distributions of Von Mises stress and contact pressure in various cases were studied.

The results showed that the bending load has a great influence on the distribution of Von Mises stress and contact pressure for premium connection. The Von Mises stress and contact pressures on the sealing surface are smaller on the tension side and greater on the compression side. With increasing axial compression load, the contact pressures on the tension side are too small, which may lead to sealing failure. The influence of temperature on the performance of premium connection cannot be ignored when choosing or designing premium connections. Both the Von Mises stress and contact pressure decrease slightly during a period of thermal cycle. Although the performance of the premium connection is good in a period of thermal cycle, its performance in a long period should be evaluated. Finite element simulation can effectively simulate the ISO 13679 test procedure and obtain the stress and contact pressure distribution. It can be used as a reference for evaluating the performance of premium connections.

Considering the convenience and universality of finite element method, as well as the contacting nonlinearity and material nonlinearity, three-dimensional finite element model of a certain type of premium connection is established with the consideration of helix angle.

Brands are investing heavily in content marketing within digital communication channels, yet there is limited understanding of the effectiveness of this content on consumer engagement. This paper aims to examine how consumer engagement with branded content is created through consumer-initiated online brand communities (OBCs) and brand-initiated digital content marketing (DCM) communications. Self-brand connections are examined as an important antecedent to the cognitive, affective, behavioural and social dimensions of consumer engagement and the subsequent impact of engagement on loyalty is explored across these two channels.

A survey approach was used with two consumer samples for one focal retail brand, namely, a consumer-initiated OBC (Facebook) and email subscribers of the retail brand’s DCM communications. A multi-group analysis of structural invariance procedure was used to comparatively examine the formation of engagement for consumers within the OBC and DCM channels.

This study demonstrates the different ways in which engagement forms across different digital communication channels. Self-brand connection (SBC) was found to strongly drive behavioural, cognitive, affective and social engagement. The cognitive, affective and behavioural engagement was found to mediate the self-brand connection and consumer loyalty relationship. Overall, this relationship was most strongly and significantly mediated by affective and cognitive engagement within the OBC channel when compared to the DCM channel.

The findings of this study should be interpreted with several limitations in mind. First, the research was conducted within the confines of one OBC, within one social networking site platform characterised by self-selected membership based on a passion and immersion with the brand. This means that consumers within the OBC were highly connected to one another and the retail brand and highly socialised in-group norms and mores. This type and intensity of connection may not be the case for all forms of OBCs. Second, this study was limited to one retail brand, from one brand category. Future research should examine OBCs across a range of utilitarian and hedonic brands to comprehensively contextualise the dimensions of engagement. Third, the data for this study was cross-sectional. The use of netnographic analysis and qualitative interviews across a range of OBCs would support the triangulation of the findings of this research, especially with regard to the narrative that consumers’ express when discussing how their SBC manifests through the dimensions of engagement. Fourth, this study explored a single antecedent of engagement, namely, self-brand connections. Future research may consider how SBC operates in conjunction with other complementary factors to enhance consumers’ affective, cognitive, social and behavioural engagement such as brand awareness, satisfaction and participation/interactivity. In addition, future research could examine an expanded array of engagement outcomes such as purchase intention, the share of wallet and reputation. Finally, future research should examine the operationalisation and validation of the dimensions of engagement using multiple competing scales to assess the suitability of these engagement scales across multiple brand categories and contexts.

Given the increasing investment in branding within social media and the fragmentation of brand communications across multiple communications platforms, the management of effective brand communications remains a significant challenge. This study found that the relationship between self-brand connections, affective, social, behavioural and cognitive engagement and loyalty was context-specific and moderated by a digital communication channel (OBC vs DCM email marketing), thus providing insights as to the effectiveness of OBCs and DCMs as two tools for enhancing consumer loyalty.

This study makes a novel contribution to the engagement literature by examining the antecedent role of self-brand connections in predicting consumers’ engagement; the moderating role of digital communication platforms (OBC vs DCM) on the formation of cognitive, affective, behavioural and social engagement; and the mediating effect of these dimensions on loyalty.

This study aims to explore the influence of a region’s network location characteristics and indirect connections on its innovation capability. The aim is to assist regions in different network locations to use innovation resources to improve their innovation capabilities more efficiently.

This paper represents the Chinese regional innovation network using the gravity model. A theoretical framework is developed to explore the relationships between a region’s innovation capability and its network location. Hypotheses are tested using hierarchical regressions.

First, this paper finds that a region’s network centrality can promote its innovation capability. Second, a structural hole can positively adjust the relationship between a region’s centrality and innovation capability. Third, a region’s indirect connections can inhibit its innovation capability while exhibiting a U-shaped relationship in moderating centrality and innovation capability.

This study uses a multi-index system to construct an innovation network covering 29 regions in China. This network represents the innovation cooperation and overall situation of innovation in China. The paper is one of the first attempts at investigating the relationship between regional network locations and innovation capability. It is also the first attempt at testing the influence of indirect connections on a region’s innovation capability. The findings provide a new perspective on the factors influencing regional innovation capacity and a new way for regions to improve their innovation capability.

The purpose of this study is to investigate the effect of panel connections on the hygrothermal performance of facade panels using a coupled, transient heat and moisture transfer analysis.

A coupled, transient heat and moisture transfer analysis has been conducted to investigate the effect of panel connections in the hygrothermal behavior of facade panels. Governing partial differential equations for the coupled heat and moisture transfer were formulated. Four panel connections proposed by pre-cast/pre-stressed concrete institute were modeled for the ultra-high performance fiber-reinforced concrete facade panel as illustrations and a finite element method was used to solve the numerical models.

The results of heat transfer analysis showed that steel connections could significantly reduce the thermal resistivity of facade panels by converging heat fluxes and acting as thermal bridges within facade panels. The results also showed that the maximum heat flux in the steel connector of the panel to foundation connection was 10 times higher compared to the other connections. Also, the results of moisture transfer showed that air gaps between the panels had higher moisture flux compared to the other layers in the models. The results show the significant importance of panel connections in the energy performance analysis of facade systems. They also highlight the importance of devising novel connection designs and materials that consider the transient, coupled heat and moisture transfer in the connections to effectively exploit the potential opportunities provided by innovative facade systems to improve building energy efficiency.

This paper, for the first time, investigates the effect of panel connections in the hygrothermal performance of building facade systems using a coupled, transient heat and moisture transfer analysis.

This paper aims to investigate and assess a perspective of combining high-strength-steel endplate with mild-steel beam and column in endplate connections.

First, experimental tests on high strength steel endplate connections were conducted at fire temperature 550°C and at an ambient temperature for reference.

The moment-rotation characteristic, rotation capacity and failure mode of high-strength-steel endplate connections in fire and at an ambient temperature were obtained through tests and compared with those of mild-steel endplate connections. Further, the provisions of Eurocode 3 were validated with test results. Moreover, the numerical study was carried out via ABAQUS and verified against the experimental results.

It is found that a thinner high-strength-steel endplate can enhance the connection’s rotation capacity both at an ambient temperature and in fire (which guarantees the safety of an entire structure) and simultaneously achieve almost the same moment resistance with a mild steel endplate connection.

The purpose of this paper is to investigate the links between investment activity and personal contacts for small- and medium-sized firms with public officials at the subnational level in Russia.

A list-experiment design, using a survey of 21,000 Russian firms in 2017, was used to evaluate the importance of personal connections with officials for conducting business.

A total of 27% of firms without investment and 37% with investment considered personal connections with officials an important factor for doing business. The importance of such contacts was lower in regions with a better investment climate. However, a higher proportion of firms were likely to invest in the regions where higher importance was placed on political connections. Therefore, in Russia in the mid-2010s, investment from politically connected firms did not crowd out investment from other firms.

Although the available data did not allow causality to be defined, the research shows that political connections are important for investors in emerging markets and that the importance of political connections diminishes with improvement in the business climate.

This paper provides a quantitative estimate of the relationship between political connections and firm investment in Russia, an example of large emerging economy. This relationship is moderated by institutional quality at the subnational level. The results provide empirical support for the theory of limited access orders elaborated by North et al. (2009), and stress the importance of rents and their productive utilization for the development of emerging economies.

This study aims to investigate the process of service gifting (i.e. unexpected upgrades or benefits) and examine why service gifts do not always result in firm-beneficial reciprocal behaviors from consumers.

Through a series of three studies including both scenario-based and game-theory-based experiments, this research proposes and empirically validates a conceptual model that examines the effect of service gifts on firm-beneficial reciprocal behaviors, and the role of collective social connection and norm of positive reciprocity (NPR) in this process.

The findings of this research show that the consumer’s feelings of collective social connection mediate the link between the provision of service gifts and firm-beneficial outcomes. Furthermore, an individual’s adherence to NPR moderates this process. Specifically, individuals with a strong adherence to NPR do not display increases in collective social connection following the receipt of a service gift. Those who are low in NPR follow the expected pattern of increased collective social connection leading to reciprocation.

Future research may further generalize the model to other situations such as high vs low context cultures. Longitudinal field experiments can be used to further investigate collective versus relational social connection, which can be either a by-product or a primary benefit derived from service delivery.

The results of this research reveal the critical role of collective social connection which has been largely ignored in service gifting research. It encourages managers to use service gifting to directly boost consumers collective social connection. Furthermore, it offers managers insight into why service gifts do not always result in firm-beneficial outcomes because of the moderating role of NPR.

The roles of social connection and the norm of reciprocity have been under-studied in both theoretical and empirical work on service gifting. This paper demonstrates that, contrary to traditional thought, those typically expected to reciprocate the most (i.e. high in NPR) may not realize increased collective social connection leading to reciprocation following receipt of a service gift.

The purpose of this study is to assess the differential impact on the stock market of statements made by and information about directors and companies who are politically connected, compared to directors and companies with no political connections. The authors also analyze the role played by state-owned enterprises (SOEs), which the authors have identified as politically connected companies because most board members are appointed by political authorities. Furthermore, the boundaries and institutional environment within which SOEs operate are likely to be different from private companies.

The sample is composed of over 60,000 news articles on the boards of directors (both with political roles and without political roles) of listed Italian companies in the period 1998–2013. On that sample the authors run a regression analysis under the signaling theory approach.

Results suggest a positive effect on market capitalization associated with individual political connections. This effect decreases when the political connection extends to the whole enterprise although it still remains, while a negative effect is associated with state-controlled enterprises. The impact of negative news content does not change depending on whether a board member has a political role or not.

Previous research has demonstrated a causal link between stock prices and their reaction to corporate news (Engelberg and Parsons, 2011; Peress, 2014), but no studies have quantified the different reactions that occur when the news mentions politically connected companies and individuals who hold a political role.

In this study, we examine the relationship between political connections of private firms and the initial public offering process. Using registration statement information, we create a unique database of politically connected IPO firms. We find that political connections are substitutes to high-quality underwriters and big four auditors. Politically connected firms manage earnings more highly upward than non-connected firms prior to the public offering. Politically connected firms also exhibit less underpricing than non-connected firms. Finally, politically connected IPO firms have superior post-IPO returns relative to non-connected IPO firms.

Many organizations report difficulties in integrating lean. A possible cause could be that methods and tools do not support each other. The purpose of this research is, therefore, to explore the nature of the connections within the system. Understanding these provides practitioners with a better way of defining their system and offers researchers a conceptual model with a new way of understanding a company-specific production system (XPS).

The study is designed as a multiple case study with three organizations and, in total, 25 lean experts serving as respondents.

The connections between the elements of an XPS act as a duality based on a problem–solution (P–S) relation. These are categorized according to complexity and can be mapped into a conceptual model, where the connections can be either symmetrical or asymmetrical.

The results provide a method to analyze causes and effects in an XPS and a conceptual model. Given the limitations of a multiple case study, future research should explore connections depending on a broader variety of contextual conditions.

The results present a way to avoid a cherry-picking problem through understanding connections between elements in an XPS. This provides a new way to understand the weaknesses of an XPS.

The research provides a new approach with insights on how to conduct research in lean production by facilitating how to understand and interpret connections between elements in a system.