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Publication date: 25 May 2021

Alessandra Girlando, Simon Grima, Engin Boztepe, Sharon Seychell, Ramona Rupeika-Apoga and Inna Romanova

Purpose: Risk is a multifaceted concept, and its identification requires complex approaches that are often misunderstood. The consequence is that decisions are based on limited…

Abstract

Purpose: Risk is a multifaceted concept, and its identification requires complex approaches that are often misunderstood. The consequence is that decisions are based on limited perception rather than the full value and meaning of what risk is, as a result, the way it is being tackled is incorrect. The individuals are often limited in their perceptions and ideas and do not embrace the full multifaceted nature of risk. Regulators and individuals want to follow norms and checklists or overuse models, simulations, and templates, thereby reducing responsibility for decision-making. At the same time, the wider use of technology and rules reduces the critical thinking of individuals. We advance the automation process by building robots that follow protocols and forget about the part of risk assessment that cannot be programed. Therefore, with this study, the objective of this study was to discover how people define risk, the influencing factors of risk perception and how they behave toward this perception. The authors also determine how the perception differed with age, gender, marital status, education level and region. The novelty of the research is related to individual risk perception during COVID-19, as this is a new and unknown phenomenon. Methodology: The research is based on the analysis of the self-administered purposely designed questionnaires we distributed across different social media platforms between February and June 2020 in Europe and in some cases was carried out as a interview over communication platforms such as “Skype,” “Zoom” and “Microsoft Teams.” The questionnaire was divided into four parts: Section 1 was designed to collect demographic information from the participants; Section 2 included risk definition statements obtained from literature and a preliminary discussion with peers; Section 3 included risk behavior statements; and Section 4 included statements on risk perception experiences. A five-point Likert Scale was provided, and participants were required to answer along a scale of “1” for “Strongly Agree” to “5” for “Strongly Disagree.” Participants also had the option to elaborate further and provide additional comments in an open-ended box provided at the end of the section. 466 valid responses were received. Thematic analysis was carried out to analyze the interviews and the open-ended questions, while the questionnaire responses were analyzed using various quantitative methods on IBM SPSS (version 23). Findings: The results of the analysis indicate that individuals evaluate the risk before making a decision and view risk as both a loss and opportunity. The study identifies nine factors influencing risk perception. Nevertheless, it must be emphasized that we can continue to develop models and rules, but as long as the risk is not understood, we will never achieve anything.

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Contemporary Issues in Social Science
Type: Book
ISBN: 978-1-80043-931-3

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Article
Publication date: 1 April 1995

J.E. Sohn and U. Ray

Weak organic acids (WOAs) are commonly used as activators in no‐clean fluxes. Surface insulation resistance (SIR) was determined as a function of WOA type and residue level…

116

Abstract

Weak organic acids (WOAs) are commonly used as activators in no‐clean fluxes. Surface insulation resistance (SIR) was determined as a function of WOA type and residue level through three temperature/humidity test environments. Acidic residue levels were determined after wave solder processing, and after exposure to each of the three test environments. With each of the WOAs studied, the greater the residue level, the lower the SIR. Chemical structure and physical property differences of the WOAs are discussed in the context of differences in SIR observed. WOA volatilisation is found to occur with all four WOAs when exposed to the highest test temperature (85°C). This work shows that testing WOA‐containing solder fluxes at 85°C may not be useful or appropriate.

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Circuit World, vol. 21 no. 4
Type: Research Article
ISSN: 0305-6120

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Publication date: 1 March 2021

Manuela Pilato, Marco Platania and Hugues Séraphin

This chapter contributes to the overall tourist satisfaction to local economies using sustainable practices. The aim therefore is to analyse to what extent the characteristics of…

Abstract

This chapter contributes to the overall tourist satisfaction to local economies using sustainable practices. The aim therefore is to analyse to what extent the characteristics of a product and service can bridge the gap between locals and visitors. This chapter is based on secondary data. We find evidence for six themes which are considered to be the most theoretical issue affecting the studies on street food in tourism considered in the analysis.

Results show that street food tourism, as a new paradigm, can be a viable option while thinking the process of sustainable tourism development in emerging destinations. Our findings have clear implications for the fast growing literature on overtourism and related perverse impacts (conceptual contribution) giving also additional options to Destination Marketing Organisations' (DMOs) managers in terms of strategy to combat tourismphobia analysed in the study. Proposals for future research will also be outlined.

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Tourism in the Mediterranean Sea
Type: Book
ISBN: 978-1-80043-901-6

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Article
Publication date: 1 January 1994

K.M. Adams, J.E. Anderson and Y.B. Graves

This study examines solvent extract conductivity (SEC) testing, e.g., Ionograph or Omega Meter testing, which measures ionic cleanliness of printed wiring boards (PWBs). SEC has…

80

Abstract

This study examines solvent extract conductivity (SEC) testing, e.g., Ionograph or Omega Meter testing, which measures ionic cleanliness of printed wiring boards (PWBs). SEC has been a quality control (QC) monitor to assure product electrical reliability. Typical SEC measurements occur after wave soldered products have been solvent‐cleaned. This study concerns SEC testing on new wave soldering processes that involve no solvent cleaning, i.e., inert gas soldering with ‘no clean’ fluxes. Results show ionic residues from ‘no clean’ fluxes may have other characteristics that make QC testing for ionic cleanliness inappropriate. However, SEC may be appropriate as a process control monitor after soldering with these fluxes. An Ionograph measured SEC response for the following chemicals: NaCl, NaF, NaBr, KCl, MgCl2, CaCl2, HCl, succinic acid, malic acid, glutaric acid, adipic acid and ethylene glycol. The list includes inorganic salts, strong electrolytes, which may arise from manufacturing or PWB materials. The list also includes weak organic acids (WOAs) common to ‘no clean’ fluxes. One non‐ionic hygroscopic chemical, ethylene glycol, was studied. Ionograph response was measured via (i) direct injection of aqueous solutions and (ii) immersion of PWBs with individual chemicals as surface deposits. All ionisable compounds, including all WOAs, produced substantial SEC response. Surface conductivity was measured at 35°C/90% relative humidity (RH) with controlled amounts of the above chemicals deposited on clean PWB test circuits. Surface loadings corresponded to the molar‐ionic equivalent of 2.0 ?g/cm2 NaCl. In addition, NaCl, adipic acid and polyethylene glycol (PEG 400) were examined as a function of concentration. Several ionisable chemicals including all WOAs produced no measurable effect, i.e., surface conductivities were indistinguishable on clean and deposited specimens. Surface conductivity increased for ionic contaminants with critical RH below ∼80% and for the non‐ionic hygroscopic glycol. SEC measurements and surface conductivities were compared. The latter is more directly related to electrical reliability. Although all ionic compounds including the WOAs showed a SEC response, not all enhanced surface conductivity. Achievement of critical RH appears to be the important factor. Adipic acid required the presence of hygroscopic glycol to enhance surface conductivity. Therefore, SEC can be a misleading QC test for electrical reliability when WOA flux residues are present.

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Circuit World, vol. 20 no. 2
Type: Research Article
ISSN: 0305-6120

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Article
Publication date: 7 September 2015

Vadimas Verdingovas, Morten Stendahl Jellesen and Rajan Ambat

This paper aims to investigate the effect of no-clean flux chemistry with various weak organic acids (WOAs) as activators on the corrosion reliability of electronics with emphasis…

604

Abstract

Purpose

This paper aims to investigate the effect of no-clean flux chemistry with various weak organic acids (WOAs) as activators on the corrosion reliability of electronics with emphasis on the hygroscopic nature of the residue.

Design/methodology/approach

The hygroscopicity of flux residue was studied by quartz crystal microbalance, while corrosive effects were studied by leakage current and impedance measurements on standard test boards. The measurements were performed as a function of relative humidity (RH) in the range from 60 to ∼99 per cent at 25°C. The corrosiveness of solder flux systems was visualized by the ex situ analysis using a gel with tin ion indicator.

Findings

The results showed that the solder flux residues are characterized by different threshold RH, above which a sudden increase in direct current leakage by 2–4 orders of magnitude and a significant reduction in surface resistance in the impedance measurements were observed.

Practical implications

The findings are attributed to the deliquescence RH of the WOA(s) in the flux and chemistry of water-layer formation. The results show the importance of WOA type in relation to its solubility and deliquescence RH on the corrosion reliability of printed circuit boards under humid conditions.

Originality/value

The classification of solder flux systems according to IPC J-STD-004 standard does not specify the WOAs in the flux; however, ranking of the flux systems based on the hygroscopic property of activators would be useful information when selecting no-clean flux systems for electronics with applications in humid conditions.

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Soldering & Surface Mount Technology, vol. 27 no. 4
Type: Research Article
ISSN: 0954-0911

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Article
Publication date: 3 February 2021

Hongmei Zhang, Shanshan Liu and Billy Bai

The primary purpose of this study is to investigate the image transfer and its effects on exhibitors’ behavioral intention. Specifically, the study attempted to examine the effect…

890

Abstract

Purpose

The primary purpose of this study is to investigate the image transfer and its effects on exhibitors’ behavioral intention. Specifically, the study attempted to examine the effect of mega business event image on destination and country image from exhibitors’ perspective and the effect of mega business event image on exhibitors’ behavioral intention toward the event.

Design/methodology/approach

The data for this study were collected through an on-site survey. Based on a sample of 393 respondents, structural equation modeling was used to test the proposed hypotheses.

Findings

The results showed that business event image has a stronger effect on country image than on destination image; event image has a significant effect on exhibitor’s behavioral intention toward the event directly and indirectly through the mediating role of country image; and country image has a significant influence on destination image.

Practical implications

The event organizer should improve the exhibitor’s perceptions of the event experience from providing a clear and attractive theme for the target audiences; exhibiting the products with the most cutting-edge technologies and offering various opportunities for forums and promotions; and planning and organizing the event in every detail carefully including the facilities, layout of booths, ambience and other related services.

Originality/value

The study expands the event type to business events, explores the image transfer process between event, destination and country and examines the effects of such image transfer on the exhibitors’ behavioral intention. The results confirm the explanatory power of image transfer theory. Attribution theory and halo effect are viewed as the mechanisms of image transfer.

研究目的

本研究的主要目的是考察形象迁移及其对参展商行为意向的影响。具体而言, 本研究(1)从参展商视角, 探讨大型商务活动形象对目的地和国家形象的影响; (2)探讨重大商务活动形象对参展商行为意向的影响。

研究设计/方法/途径

本研究的数据通过现场调查收集, 基于393份问卷, 使用结构方程模型检验研究假设。

研究发现

研究结果表明:(1)商务活动形象对国家形象的影响比对目的地形象的影响更大; (2)通过国家形象的中介作用, 大型商务活动形象直接或间接地影响了参展商的行为意图; (3)国家形象显著影响目的地形象。

实践意义

活动组织者应从以下方面改善参展商对活动体验的认识:(1)提供清晰且有吸引力的主题; (2)展示具有最前沿技术的产品, 并提供各种论坛和促销机会; (3)认真, 细致地筹划和组织活动, 包括设施, 摊位布置, 氛围和其他相关服务。

原创性/价值

本研究将活动类型延伸至商务活动, 探索活动、目的地和国家之间的形象迁移, 检验形象迁移对参展商行为意向的影响。结果证实了形象迁移理论的解释力。归因理论和晕轮效应是形象迁移的内在机制。

Transferencia de imágenes entre un megaevento empresarial, el destino y el país del alojamiento y sus efectos sobre la predisposición de los expositores hacía el evento

Propósito

el objetivo principal de este estudio es investigar la transferencia de imágenes y sus efectos sobre la predisposición de los expositores. Específicamente, el estudio intentó examinar (1) el efecto de la imagen de megaevento de negocios en la imagen del destino y del país desde la perspectiva de los expositores y (2) el efecto de la imagen de megaevento de negocios en la predisposición de los expositores hacia el evento.

Diseño/metodología/enfoque

los datos de este estudio se obtuvieron mediante una encuesta in situ. Sobre la base de una muestra de 393 encuestados, se utilizó el modelo de ecuaciones estructurales para probar las hipótesis propuestas.

Resultados

los resultados mostraron que: (1) la imagen del megaevento tiene un efecto más fuerte en la imagen del país que en la del destino; (2) la imagen del evento tiene un efecto significativo directo e indirecto sobre la predisposición del expositor hacia el evento a través del papel mediador de la imagen del país; (3) la imagen del país tiene una influencia significativa en la imagen de destino.

Implicaciones prácticas

el organizador del evento debe mejorar las percepciones del expositor sobre la experiencia del evento (1) proporcionando un tema claro y atractivo para el público objetivo; (2) exhibir los productos con las tecnologías más avanzadas y ofrecer diversas oportunidades para foros y promociones; y (3) planificar y organizar el evento cuidando los detalles, incluyendo las instalaciones, el diseño de las cabinas, el ambiente y otros servicios relacionados.

Originalidad/valor

el estudio amplía el tipo de evento a eventos de negocios, explora el proceso de transferencia de imágenes entre evento, destino y país, y examina los efectos de dicha transferencia de imágenes en la predisposición de los expositors hacía el evento. Los resultados confirman el poder explicativo de la teoría de transferencia de imágenes. La teoría de la atribución y el efecto halo son vistos como los mecanismos de transferencia de imágenes.

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Article
Publication date: 2 May 2017

Vadimas Verdingovas, Salil Joshy, Morten Stendahl Jellesen and Rajan Ambat

The purpose of this study is to show that the humidity levels for surface insulation resistance (SIR)-related failures are dependent on the type of activators used in no-clean…

322

Abstract

Purpose

The purpose of this study is to show that the humidity levels for surface insulation resistance (SIR)-related failures are dependent on the type of activators used in no-clean flux systems and to demonstrate the possibility of simulating the effects of humidity and contamination on printed circuit board components and sensitive parts if typical SIR data connected to a particular climatic condition are available. This is shown on representative components and typical circuits.

Design/methodology/approach

A range of SIR values obtained on SIR patterns with 1,476 squares was used as input data for the circuit analysis. The SIR data were compared to the surface resistance values observable on a real device printed circuit board assembly. SIR issues at the component and circuit levels were analysed on the basis of parasitic circuit effects owing to the formation of a water layer as an electrical conduction medium.

Findings

This paper provides a summary of the effects of contamination with various weak organic acids representing the active components in no-clean solder flux residue, and demonstrates the effect of humidity and contamination on the possible malfunctions and errors in electronic circuits. The effect of contamination and humidity is expressed as drift from the nominal resistance values of the resistors, self-discharge of the capacitors and the errors in the circuits due to parasitic leakage currents (reduction of SIR).

Practical/implications

The methodology of the analysis of the circuits using a range of empirical leakage resistance values combined with the knowledge of the humidity and contamination profile of the electronics can be used for the robust design of a device, which is also important for electronic products relying on low current consumption for long battery lifetime.

Originality/value

Examples provide a basic link between the combined effect of humidity and contamination and the performance of electronic circuits. The methodology shown provides the possibility of addressing the climatic reliability of an electronic device at the early stage of device design by using typical SIR data representing the possible climate exposure.

Details

Circuit World, vol. 43 no. 2
Type: Research Article
ISSN: 0305-6120

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Article
Publication date: 5 June 2017

Kamila Piotrowska, Morten Stendahl Jellesen and Rajan Ambat

The aim of this work is to investigate the decomposition behaviour of the activator species commonly used in the wave solder no-clean flux systems and to estimate the residue…

406

Abstract

Purpose

The aim of this work is to investigate the decomposition behaviour of the activator species commonly used in the wave solder no-clean flux systems and to estimate the residue amount left after subjecting the samples to simulated wave soldering conditions.

Design/methodology/approach

Changes in the chemical structure of the activators were studied using Fourier transform infrared spectroscopy technique and were correlated to the exposure temperatures within the range of wave soldering process. The amount of residue left on the surface was estimated using standardized acid-base titration method as a function of temperature, time of exposure and the substrate material used.

Findings

The study shows that there is a possibility of anhydride-like species formation during the thermal treatment of fluxes containing weak organic acids (WOAs) as activators (succinic and DL-malic). The decomposition patterns of solder flux activators depend on their chemical nature, time of heat exposure and substrate materials. Evaporation of the residue from the surface of different materials (laminate with solder mask, copper surface or glass surface) was found to be more pronounced for succinic-based solutions at highest test temperatures than for adipic acid. Less left residue was found on the laminate surface with solder mask (∼5-20 per cent of initial amount at 350°C) and poorest acid evaporation was noted for glass substrates (∼15-90 per cent).

Practical implications

The findings are attributed to the chemistry of WOAs typically used as solder flux activators. The results show the importance WOA type in relation to its melting/boiling points and the impact on the residual amount of contamination left after soldering process.

Originality/value

The results show that the evaporation of the flux residues takes place only at significantly high temperatures and longer exposure times are needed compared to the temperature range used for the wave soldering process. The extended time of thermal treatment and careful choice of fluxing technology would ensure obtaining more climatically reliable product.

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Soldering & Surface Mount Technology, vol. 29 no. 3
Type: Research Article
ISSN: 0954-0911

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Article
Publication date: 4 December 2020

Fatma Altuntas and Mehmet Şahin Gök

This study aims to propose a novel approach based on utility mining to find the associations among wind energy technologies.

375

Abstract

Purpose

This study aims to propose a novel approach based on utility mining to find the associations among wind energy technologies.

Design/methodology/approach

The proposed approach uses patent documents and utility mining. Associations among wind energy technologies have been evaluated to show how the proposed approach works in practice.

Findings

Determining the relationships between wind energy technologies provide essential information to investors and decision-makers. Therefore, a real-life case study of wind energy technology is performed to show how the proposed approach works in practice. The proposed approach founds technology classes associated with wind energy technology. Furthermore, the strongest associations among technologies are also obtained by the proposed approach. The results of the case study show that the proposed approach can be easily used in practice. The maximum size of itemsets is 18-level itemsets. Y02E and F03D cooperative patent classification (CPC) codes appear on all itemsets. As the technologies of Y02E and F03D are directly correlated, they will be mutually developed in the future. Additionally, the number of patent corresponding to Y02E and F03D CPC codes are 7,494 and 6,577, respectively.

Originality/value

This is the first study that applies the utility mining-based approach to patent documents. Different levels of importance among technologies based on patent citations and the number of repetitions of each technology class are considered in the proposed approach.

Details

Kybernetes, vol. 50 no. 9
Type: Research Article
ISSN: 0368-492X

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Article
Publication date: 1 January 1993

U. Ray and I. Artaki

Terpene based cleaning agents, such as Petroferm Inc.'s EC‐7,® are currently being used successfully for cleaning rosin based fluxes from a variety of electronics substrates…

81

Abstract

Terpene based cleaning agents, such as Petroferm Inc.'s EC‐7,® are currently being used successfully for cleaning rosin based fluxes from a variety of electronics substrates. However, if rosin undergoes any thermal degradation during the various soldering operations, the effectiveness of the cleaning process becomes acutely dependent on the condition and control of the terpene bath. One of the problems associated with controlling the cleaning process is an ‘ageing’ effect of the cleaning solution as evidenced by a noticeable colour change, substantial increase in viscosity and decrease in cleaning effectiveness. There is, therefore, a critical need for accurately monitoring EC‐7 chemical composition during normal process use. FT‐IR was identified as a suitable analytical technique for convenient and accurate monitoring of the EC‐7 composition. The terpene and surfactant components of EC‐7 have characteristic fingerprints in the IR spectrum. Calibration curves were generated and used to determine the composition of ‘aged’ EC‐7 solutions. As rosin has its own unique IR absorption band, rosin contamination (bath loading) can also be easily determined. These studies demonstrated that the ageing process is governed by both the volatilisation and the oxidation of the terpene component in EC‐7, the relative rates being determined by the specific configuration of the cleaning equipment used.

Details

Circuit World, vol. 19 no. 2
Type: Research Article
ISSN: 0305-6120

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