Joints realized by sintering of pressureless Ag paste

Circuit World ◽  
2019 ◽  
Vol 45 (1) ◽  
pp. 2-8
Author(s):  
Alena Pietrikova ◽  
Tomas Girasek ◽  
Lubomir Livovsky ◽  
Juraj Durisin ◽  
Karel Saksl

Purpose The purpose of this paper was to investigate an influence of a low temperature pressureless sintering process of silver paste on the quality of sintered joints. Design/methodology/approach The authors analyzed various curing conditions of the paste during its sintering process: 175°C/90 min, 200°C/60 min, 250°C/30 min, 250°C/60 min, 350°C/30 min and 350°C/60 min. They analyzed an influence of the surface plating applied on a ceramic substrate/layer (Cu, Ag, AgPt and Au thick film) on the joints quality. The authors analyzed microstructure and electrical resistance of the joints. They evaluated these properties from the point of view of thermal aging process and changing resistance, after a constant current loading of the sintered joints. Findings The nanoscale pressureless silver paste can be applied for replacing a pressure-assisted micro-sized silver paste. It was found that the quality of the metal plating applied on the ceramic substrate/layer has a significant impact on the quality of the sintered joints. Copper and AgPt plating have better impact on quality of sintered joints in compare with Ag plating. Originality/value This investigation of the quality of the pressureless sintered joints at the silver-silver interface reveals an evident cracking immediately after the silver paste curing. Rapid sintering process typical for silver-based films on the substrate is because of the inter-diffusion between the micro and nanoparticles of silver at interfacial interface.

2006 ◽  
Vol 27 (6/7) ◽  
pp. 505-514 ◽  
Author(s):  
Jie Huang ◽  
Katherine Wong

PurposeFrom the cataloging librarians' point of view, this paper aims to present how technical services, especially the cataloging department, can play important roles in the improvement of user services.Design/methodology/approachThe paper examines the practices of the University of Oklahoma Libraries.FindingsThe paper identifies several aspects in which technical services can enhance the quality of user services, especially in the cataloging department. A library's online catalog becomes the first point of access to the library's information resources. Its quality can be improved and enriched in many ways to raise users’ satisfaction. Aside from the improvement in technical aspects, efforts should also be made to promote collaboration between technical and public services so as to ensure efficient processing of materials and to meet the needs of library users.Originality/valueThe value of the paper is in showing that the quality of an online catalog and the cooperation between public and technical services are two of the key factors in achieving high quality of user services.


2019 ◽  
Vol 34 (6) ◽  
pp. 1210-1222 ◽  
Author(s):  
Tibor Mandják ◽  
Samy Belaid ◽  
Peter Naudé

Purpose The purpose of this paper is to empirically investigate how context influences the quality of business relationships. This theoretical question is studied from the point of view of trust, one of the important components of business relationship quality. The authors study how trust is related to the dynamics and management of the business relationship in the context of an emerging market. Design/methodology/approach This paper is based on qualitative interviews with 15 spare-parts resellers in the Tunisian automotive industry. The authors take a monadic view, interviewing resellers about their relationships with their wholesalers-importers. The decision to undertake the research in Tunisia is based on three factors. First, Tunisia is an emerging country and there is very little published research based in the Maghreb countries. Second, the Tunisian automotive parts market structure is relatively simple and, hence, easily understood, with most spare-parts being imported because of the low level of local production. Third, the actors in the study are all Tunisian companies, so research allows us to explore relationships between local companies in an emerging country. Findings The authors find that different kinds of trust play different roles over the dynamics of the relationship. Perceived trust is more important at the emergent stage of a relationship, and as the two parties learn from each other, experienced trust becomes more important in the established relationships. The initial perceived trust creates the possibility of building trust, and when mutual trust exists between the parties, it motivates them to maintain the relationship, but there is always the threat of the degradation of the quality of the relationship because of the violation or destruction of the trust. Research limitations/implications This paper shows that more care should be taken when using trust as the variable under scrutiny. Different aspects of trust manifest themselves at various stages of the relationship building cycle. Practical implications The results emphasize that when initiating a business relationship, managers first need to create perceived trust. Thereafter, once trust is built up, it is the trust that may “manage” or act to control the on-going relationship as long as the partners’ behavior or network changes do not violate the trust. Originality/value The results of this paper show that there is a mutual but not necessarily symmetrical or balanced influence of trust on the behavior of the partners involved. The influence of the different parties is dependent on the power architecture, the history of the relationship and the network position of the actors.


2017 ◽  
Vol 29 (7) ◽  
pp. 1956-1976 ◽  
Author(s):  
Deniz Kucukusta

Purpose This research aims to investigate how Chinese leisure travelers value hotel amenities when they book hotel rooms in Hong Kong. Design/methodology/approach The research method was based on a conjoint analysis approach. Conjoint models were developed to determine how people make decisions and what they really value in products or services. Findings Price had the highest average importance value, followed by airport/local area shuttles, wireless internet, breakfast and quality of coffee/tea. Price, airport/local area shuttles and wireless internet were rated as being relatively more important than breakfast and quality of coffee/tea. Research limitations/implications This research has some limitations in terms of the generalizability of its findings to all hotels and travelers. First, only four hotel amenities were considered. Second, the research focused on Chinese leisure travelers staying in hotels in Hong Kong. Finally, the sample only consisted of leisure travelers. Practical implications This research shows that providing complimentary breakfast and free access to quality coffee/tea when a hotel already provides a shuttle service and free wireless internet does not add much value to the overall hotel product from the customer’s point of view. Moreover, it provides insights into how hotel professionals can customize and select the amenities they provide to impress their customers. Originality/value This research has significant implications for hotel managers’ efforts to formulate and implement strategies or tactics in their daily operations or long-term plans through the selection of hotel amenities.


2015 ◽  
Vol 4 (3) ◽  
pp. 186-193 ◽  
Author(s):  
Ulla Runesson

Purpose – It has been suggested that, if pedagogical and learning theories are integrated into lesson and learning study, a systematic construction of pedagogical knowledge is possible (Elliott, 2012). In this Special Issue, it is reported how theory and theoretical concepts can add value to lesson and learning study. The purpose of this paper is to introduce the Special Issue and explore the above concepts. Design/methodology/approach – This paper presents the Special Issue papers thematically and the main issues are discussed. Findings – Together the papers suggest that pedagogical theories and theorizing practice may contribute to the improvement of teachers’ practical knowledge and knowledge about teachers’ professional tasks and objects. Furthermore, some theories and theoretical concepts hitherto under-exploited in lesson and learning study are presented and discussed from the point of view how these might improve the quality of the studies. Originality/value – As a total, this collection of papers bring out issues about the role of pedagogical and learning theories and how these could inform lesson and learning study.


2020 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Francisca Castilla-Polo ◽  
María Del Consuelo Ruiz-Rodríguez

PurposeThe purpose of this research objective was to analyse social reporting within MERCO Business companies both from the point of view of the quantity of information disclosed and the references about their quality. This approach constitutes a novelty with respect to previous literature on the subject.Design/methodology/approachThis paper assesses how social reporting is being carried out by the companies included in the MERCO Corporate Reputation Business Monitor, MERCO Business, during the period 2014–2016. The methodological design include the construction of a weighted index based on two unweighted indexes related to the quantity revealed and the quality detected. In addition, this study integrates intellectual capital and social responsibility approaches in order to deep into these voluntary disclosures.FindingsWhile social reporting is considerable from a quantitative point of view within MERCO Business companies, they do not reach very high levels of quality, which is good to counteract the final value of the quantity–quality index that the authors' propose.Research limitations/implicationsIn MERCO Business companies, quantity is not a proxy for quality within social reporting. In this sense, only considering both dimensions it will be possible to assess these disclosures in a more complete way.Practical implicationsThis study allows a more accurate and comparable view of social reporting than those studies that only focus on how much information is disclosed. Besides, it involves an important advance in the identification of the relative quality of social reporting, opening a new line of research that will be key to comparing this type of disclosures in a more homogeneous way. Likewise, the results can be applied in future studies in the intellectual capital field given the complementarity between both types of disclosures.Social implicationsLikewise, these results will be of interest for future actions aimed at regulating the improvement of the quality of social reporting in the hands of managers, investors and regulators.Originality/valueThe authors have tested the value of quality in social reporting using a weighted index amongst the most reputable companies in the Spanish scenario. These disclosures have been compared with and without the use of it in order to deduce its value to obtain valid conclusions about social reporting.


2019 ◽  
Vol 27 (1) ◽  
pp. 2-12 ◽  
Author(s):  
David E. Alexander ◽  
Ian R. Davis

PurposeThe purpose of this paper is to review the issues and challenges associated with examining PhD theses in the modern, rapidly changing academic world. The PhD degree has been described as the “pinnacle of academic qualifications”, but it is under threat in terms of the quality of supervision and the outcome of examinations. By bringing the issues into the open and discussing them, more can be done to safeguard the health of the modern doctorate.Design/methodology/approachThis paper reviews the mainstream academic literature on doctoral degrees from the point of view of the origin and development of the contemporary PhD. Then it offers some reflections on supervision, examination, standards of judgement, benchmarking of results and different routes to the doctorate. The pressures upon the modern university are related to issues encountered in examining doctoral theses.FindingsIn modern neo-liberal environments, the PhD degree is under pressure in terms of its quality and rigour. This paper offers a simple conceptual model of the challenges involved in ensuring the quality of PhD examinations and their outcomes. Priorities for the various stakeholders are suggested to ensure that PhD research continues to set the “gold standard” for excellence.Practical implicationsRecognising and confronting the problems with the modern PhD and how it is examined will help guarantee the quality of the degree. A more open debate on the pressures under which supervision and examinations are conducted will help establish rules or guidelines for conduct.Originality/valueThere are remarkably few evaluations of the PhD examination process, which in recent years has become increasingly problematic. The authors adopt a comprehensive approach to the issues and relate them to the societal context in which universities are developing.


2015 ◽  
Vol 9 (1) ◽  
pp. 57-76 ◽  
Author(s):  
Matthias Heinicke

Purpose – Against the background of alternative sources for feeding biogas plants, this paper aims to consider a utilization of landscaping waste as alternative to common crops. Design/methodology/approach – In consideration of survey data, a robust framework is proposed based on characterizations of source and sink to meet the requirements of both sides reliably. Depending on available data and further surveys, a level of detail approach of a biomass supply chain is conducted in this regard. Findings – In this context, different types of landscaping waste suitable for both biogas generation and incineration were defined. With respect to the sporadically minor quantities of landscaping waste, minor capacity load in terms of transportation is one crucial factor within an entire concept of logistics. Practical implications – Due to the arising cost function, possibilities and needs of utilizing landscaping waste for alternative energy generation in biogas plants and incineration plants are drawn. Originality/value – Moreover, economic and technological challenges concerning a utilization of landscaping waste in biogas plants are systematically revealed. Thus, technological processes in biogas plants were considered from a managerial point of view. The characteristics of rotting biomass in terms of its shelf life are considered additionally to ensure the required quality of input material particularly for the process of biogas generation.


2017 ◽  
Vol 9 (3) ◽  
pp. 349-360 ◽  
Author(s):  
Leonardo (Don) A.N. Dioko ◽  
Amy S.I. So

Purpose The purpose of this study is to propose a destination-level framework incorporating subjective and overall assessments of residents’ quality of life (QOL) and visitors’ quality of experience (QOE) as a means for managing optimum levels of visitor volume at destinations. Design The proposed framework is empirically tested and applied using a large-scale survey of residents and visitors across a four-year time span in Macao, a Special Administrative Region of China that counts among the smallest and densest city-states in the world and which has borne the full force of extraordinary rapid tourism growth in recent years. Findings The study’s findings suggest that subjective assessments of residents’ QOL and visitors’ QOE interact and must be considered together when assessing sustainable levels of tourism at the level of a destination. Originality The study’s value lies in its use of a large-scale survey across a four-year time span to empirically validate theorized maximal values of QOL assessments from the point of view of residents as well as quality of visiting experience from the point of view of visitors. This finding lays future groundwork for more robust management of tourism growth in destinations.


2020 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Hanne Sørum ◽  
Wanda Presthus

PurposeThis paper investigates the European Union's General Data Protection Regulation (GDPR) in information systems (ISs). The GDPR consists of 99 articles, and two articles are emphasised – namely Article 15, which deals with rights of access by the data subject, and Article 20, which deals with the right to data portability.Design/methodology/approach15 companies operating in the Norwegian consumer market were randomly selected. Each company received an inquiry pertaining to rights of access by the data subject (Article 15) and the right to data portability (Article 20). The research team carefully analysed the answers received and categorised the responses according to the two articles emphasised.FindingsThe findings show extensive variations among the companies in terms of response time, quality of feedback and how companies handle requests concerning rights of access by the data subject (Article 15) and the right to data portability (Article 20). Differences are also pertaining to the types of files, along with the content of these files. It should be noted, however, that most of the companies replied to the inquiry before the deadline. The findings show that companies comply better with Article 20 than Article 15. However, it appears that they do not differentiate between the two articles.Originality/valueThis study explores a research topic that is relatively new. It addresses a gap in the extant research by highlighting how the GDPR works in practice from a consumer's perspective. In addition, guidelines are offered to the consumers and companies affected by the GDPR.


2020 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Oriol Anguera-Torrell ◽  
Jordi Arcos-Pumarola ◽  
Aurélie Cerdan Schwitzguébel ◽  
Laia Encinar-Prat

Purpose The purpose of this paper is to analyse the disruption potential on the daily life of Barcelona’s residents of HolaPlace, a new peer-to-peer (P2P) marketplace for terraces and rooftops. Specifically, it describes its listings’ characteristics and examines their geographical overlapping with signs of tourism-related disruption on residents’ quality of life. Design/methodology/approach Available data of the listings in this P2P platform has been scraped in November 2019. This data has been combined with two other sources of information that provide information on the tourism intensity in the different neighbourhoods of the city. The obtained information has been examined using quantitative and qualitative techniques. Findings P2P rooftops and terraces tend to be located in the same neighbourhoods that were already experiencing a high concentration of tourism activity. Moreover, the identified characteristics of the listings suggest that the rental of these terraces and rooftops might impact on the daily life of the residents. Research limitations/implications This study has only examined the offer of P2P terraces and rooftops in Barcelona. Further studies should also take into account how this business model affects other cities, and how it impacts on residents. Social implications The conducted analysis highlights the importance of a proactive regulation of this new P2P phenomenon that anticipates the potential socials costs on the daily life of residents. Originality/value The rental of terraces and rooftops in a P2P fashion is a novel phenomenon and, consequently, it has not been previously studied from an academic point of view.


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