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Discussion of scientific progress in science philosophy texts suggests that aggressiveness and selfishness on the part of scientists is associated with high productivity. It is argued that the behaviour that appears to be the most improper actually facilitates the manifest goals of science. This article shows that the making of the 1930s generation of a sample of eminent economists was shaped by a high sense of co‐operation; continuing collaborative contact in the form of dual authorships of books and articles, joint teaching assignments, and review and support of each other′s writings, but very little of the intensive, relentless competition one finds among natural scientists. The difference stems not so much from the fact that economics is a soft science, but rather from the degree of maturity of the discipline. The 1930s generation of economists was fortunate to enter the field at a time when it was ready for its take off.

This paper presents recently published resources on library instruction and information literacy. It provides an introductory overview and a selected annotated bibliography of publications covering various library types, study populations and research contexts. The selected bibliography is useful to efficiently keep up with trends in library instruction for busy practitioners, library science students and those wishing to learn about information literacy in other contexts.

This article annotates 424 English-language periodical articles, monographs, dissertations, theses and reports on library instruction and information literacy published in 2021. The sources were selected from the EBSCO platform for Library, Information Science, and Technology Abstracts (LISTA), Education Resources Information Center (ERIC), Scopus, ProQuest Dissertations and Theses, and WorldCat, published in 2021 that included the terms “information literacy,” “library instruction,” or “information fluency” in the title, abstract or keywords. The sources were organized in Zotero. Annotations summarize the source, focusing on the findings or implications. Each source was categorized into one of seven pre-determined categories: K-12 Education, Children and Adolescents; Academic and Professional Programs; Everyday Life, Community, and the Workplace; Libraries and Health Information Literacy; Multiple Library Types; and Other Information Literacy Research and Theory.

The paper provides a brief description of 424 sources and highlights sources that contain unique or significant scholarly contributions.

The information may be used by librarians, researchers and anyone interested as a quick and comprehensive reference to literature on library instruction and information literacy within 2021.

This study aims to confirm the expected impact of coronavirus (COVID-19) related to perceived travel risk on the likelihood of tourists to visit a destination. It then aims at identifying the key predictors of perceived travel risk in the aftermath of the COVID-19 pandemic. A theoretically grounded framework is proposed which can be further improved to understand and predict international travel behaviours within the context of global pandemics.

A mixed-methods design is adopted. In the first phase referred to as Study 1, a cross-sectional design is used based on a sample of 217 international outgoing tourists surveyed at the Mauritian International Airport and data is analysed using hierarchical regression. In Phase 2, referred to as Study 2, a purposive sample of tourists around the world are interviewed and data is analysed using the thematic analysis technique.

The results show that amongst those tourists who are willing to travel in the aftermath of the COVID-19 crisis, the related perceived risk is likely to influence their travelling intention. Several key predictors of perceived travel risks are uncovered, those are categorised as COVID-19 status; transportation services; national sanitary measures; health-care services; accommodation services; ecotourism facilities. Moreover, the potential effects of those factors on perceived COVID-19 related travel risk are likely to be moderated by the trustworthiness of the information.

The implications of the study are important for researchers and policymakers to better understand and predict travellers’ behaviour in times of pandemics. These implications are also important to tourism marketers and transport and hospitality service providers to more effectively manage and mitigate the effect of such events.

The study provides an original comprehensive model grounded in the social cognitive theory and protection motivation theory to understand the predictors of perceived travel risks in relation to COVID-19 at a destination.

本文采用了混合的研究方法设计。在研究1的第一阶段中, 本文采用了横向比较研究设计, 对在毛里求斯国际机场进行调查收集的217名国际出境游客样本, 使用分层回归分析了数据。在第二阶段（研究2）中, 采用了立意取样的抽样方法, 采访了来自世界各地的旅游者, 并使用主题分析技术对数据进行了分析。

这项研究证实了与COVID-19相关的感知旅行风险对游客访问目的地的可能性的预期影响。然后, 它旨在确定COVID-19大流行后感知的旅行风险的关键影响因子。

结果表明, 在COVID-19危机之后愿意旅行的那些游客中, 相关的感知风险很可能会影响他们的旅行意图。感知的旅行风险的几个关键影响因素分为：COVID-19状况; 运输服务; 国家卫生措施; 医疗服务; 住宿服务; 生态旅游设施。而且, 这些因素对与COVID-19相关的感知旅行风险的潜在影响可能会受到信息的可信度的调节影响。

该研究对于研究人员和决策者更好地了解和预测大流行期间旅客的行为, 以及旅游营销人员以及运输和酒店服务供应商提供有效管理和减轻此类事件的影响具有重要意义。

该研究提供了一个原创且全面的模型, 以了解与目的地COVID-19相关的感知旅行风险的影响因素。

Se adopta un diseño de métodos mixtos. En la primera fase, denominada estudio 1, se adopta un diseño transversal basado en una muestra de 217 turistas internacionales encuestados salientes del Aeropuerto Internacional de Mauricio y los datos se analizan mediante regresión jerárquica. En la segunda fase, denominada estudio 2, se entrevista a una muestra intencional de turistas de todo el mundo y se analizan los datos mediante la técnica de análisis temático.

Este estudio confirma empíricamente el impacto esperado de la percepción del riesgo de viaje relacionado con COVID-19 sobre la probabilidad de que los turistas visiten un destino. A continuación, tiene por objeto identificar los principales factores de predicción del riesgo percibido de los viajes tras la pandemia de COVID-19.

Los resultados muestran que entre los turistas que están dispuestos a viajar tras la crisis de COVID-19, es probable que el riesgo percibido relacionado influya en su intención de viaje. Se han descubierto varios predictores clave de los riesgos percibidos de los viajes, que se clasifican como: Situación de COVID-19; servicios de transporte; medidas sanitarias nacionales; servicios de salud; servicios de alojamiento; instalaciones de ecoturismo. Además, es probable que los posibles efectos de esos factores en la percepción de los riesgos de viaje relacionados con COVID-19 se vean moderados por la fiabilidad de la información.

Las repercusiones del estudio son importantes para que los investigadores y los encargados de formular políticas comprendan y prevean mejor el comportamiento de los viajeros en épocas de pandemia y también para que el mercado turístico y los proveedores de servicios de transporte y hostelería gestionen y mitiguen más eficazmente el efecto de esos acontecimientos.

El estudio proporciona un modelo original y completo para comprender los predictores de los riesgos percibidos en los viajes en relación con COVID-19 en un destino.

The purpose of the present study was to review the thermo-mechanical challenges of reflowed lead-free solder joints in surface mount components (SMCs). The topics of the review include challenges in modelling of the reflow soldering process, optimization and the future challenges in the reflow soldering process. Besides, the numerical approach of lead-free solder reliability is also discussed.

Lead-free reflow soldering is one of the most significant processes in the development of surface mount technology, especially toward the miniaturization of the advanced SMCs package. The challenges lead to more complex thermal responses when the PCB assembly passes through the reflow oven. The virtual modelling tools facilitate the modelling and simulation of the lead-free reflow process, which provide more data and clear visualization on the particular process.

With the growing trend of computer power and software capability, the multidisciplinary simulation, such as the temperature and thermal stress of lead-free SMCs, under the influenced of a specific process atmosphere can be provided. A simulation modelling technique for the thermal response and flow field prediction of a reflow process is cost-effective and has greatly helped the engineer to eliminate guesswork. Besides, simulated-based optimization methods of the reflow process have gained popularity because of them being economical and have reduced time-consumption, and these provide more information compared to the experimental hardware. The advantages and disadvantages of the simulation modelling in the reflow soldering process are also briefly discussed.

This literature review provides the engineers and researchers with a profound understanding of the thermo-mechanical challenges of reflowed lead-free solder joints in SMCs and the challenges of simulation modelling in the reflow process.

The unique challenges in solder joint reliability, and direction of future research in reflow process were identified to clarify the solutions to solve lead-free reliability issues in the electronics manufacturing industry.

This issue is a selected bibliography covering the subject of leadership.