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Based on core description, gas logging and laboratory analysis, this paper aims to study the controlling effect of the types of shale sedimentary microfacies in coal formations over shale reservoirs using the example of Shanxi formation in Northern Ordos Basin.

According to core observation, the authors selected typical samples of rock types for thin section analysis to determine the micro features and compositions of rocks.

By using core observation, we found that fine lithology in Shanxi formation included major shale, carbonaceous shale, partially carbonaceous shale, partially silty shale and silty shale with colors of gray, dark gray, black and/or gray. Shanxi Formation shale are deposited in plant-rich and plant-poor swamps, interdistributary depressions of delta plains, interfluvial depressions of meandering rivers as well as microfacies environment of natural levees and the distal crevasse splay.

Currently, the research on the shale gas in Shanxi Formation in the Ordos Basin is still in its infancy. There is yet no research on the fine-grained partition of the sedimentary facies in coal accumulation environment of Shanxi formation and the controlling effect of sedimentary microfacies over shale reservoirs.

This paper investigates the effects of advising strength of a recommendation agent on users' trust and distrust beliefs and how the effects are moderated by perceived brand familiarity.

A research model is evaluated using a laboratory experiment with 149 participants.

Results reveal that a strong advising tone leads to higher trust in terms of users' credibility and benevolence beliefs and lower distrust in terms of their discredibility beliefs (the trustor's concerns regarding the trustee's dishonesty and competence in engaging in harmful behavior) when perceived brand familiarity is high. By contrast, when brand familiarity is low, strong advising tone results in low trust in terms of users' credibility belief and high distrust in terms of their beliefs in discredibility and malevolence (concerns regarding the trustee's conduct in terms of a malicious intention that can hurt the trustor's welfare).

This paper contributes to the trust and distrust literature by studying how each of the dimensions of trust and distrust can be affected by an RA's design feature. It extends the attribution theory to the RA context by studying the moderating role of brand familiarity in determining the effects of the advising strength of an RA. It provides actionable guidelines for practitioners regarding the adoption of an RA's appropriate advising strength to promote different types of products.

Thailand has served as a major outbound tourist destination for Chinese tourists for decades. Behaviours demonstrated by Chinese tourists in Thailand are believed to have created an image of Chinese outbound tourists among the residents and have impacted on the sustainability of Thai tourism. This study aims to contribute a more comprehensive and nuanced understanding of the image of Chinese outbound tourists from the perspective of Thai residents’.

In-depth interviews were conducted with 15 Thai residents who have frequent contact with Chinese tourists.

The results reveal that Thai residents’ perceptions of Chinese tourists include both positive and negative images. Positive images consist of being filial and friendly (e.g. taking good care of the elderly and having close emotional ties within their touring group) and being wealthy and auspicious (e.g. having a lot of money to spend and tipping generously). Negative images include moral norms (e.g. making loud noises and jumping into a queue), hygiene habits (e.g. littering and spitting) and religious culture (e.g. touching and climbing Buddha statues).

This qualitative research promotes the study of destination residents’ perceptions of tourists’ in the context of outbound tourism and enriches the application of social representation theory from the perspective of residents in the field of tourism marketing. It generates a more nuanced comprehension of Thai residents’ perceptions of Chinese tourists, contributes to the government’s formulation of guidelines for civilised tourism and has benefits to the sustainable development of tourism destinations.

泰国居民对中国游客的形象感知

摘要

几十年来, 泰国一直是中国游客的主要出境旅游目的地。中国游客在泰国表现出的行为在居民中创造了中国出境游客的形象, 并影响了泰国旅游业的可持续性。这项研究旨在从泰国居民的感知出发, 对中国出境游客的形象进行更全面、细致的了解。

对15位经常与中国游客接触的泰国居民进行了深入访谈。

结果表明, 泰国居民对中国游客形象的感知既包括正面形象也包括负面形象。正面的形象包括孝顺和友善（例如, 照顾老人, 并在其旅行团中保持紧密的情感联系）, 富有和吉祥（例如, 有很多钱可花, 并慷慨地付小费）, 而负面的形象则包括道德规范（例如, 大声喧哗, 并插队）, 卫生习惯（例如, 乱扔垃圾和随地吐痰）以及宗教文化（例如, 触摸和爬到佛像上）。

这项定性研究弥补了出境旅游背景下目的地居民对游客形象的感知的差距, 并且从居民的角度出发丰富了社会表象理论在旅游营销领域的应用。它使泰国居民对中国游客的认识更加细致, 有助于政府制定有针对性的文明旅游指导方针, 有利于旅游目的地未来的可持续发展。

Percepción de los residents tailandeses sobre el comportamiento de los turistas chinos

Por décadas, Tailandia ha sido un principal destino tulístico de turismo emisor para los turistas chinos.El comportamiento de los turistas chinos en Tailandia ha impresionado las imagenes de los turistas chinos emisores a los habitantes, y ha afectado la sostenibilidad de la industria turística de Tailandia. Esta investigación tiene como objetivo comenzar con la percepción de los habitantes tailandeses para conocer una comprensión más completa y detallada de las imagenes de los turistas chinos emisores.

Entrevisitar en profundidad a 15 habitantes tailandeses que a menudo contactan con los turistas chinos.

Los resultados muestran, las percepciones de los habitantes tailandeses de las imagenes de los turistas chinos contienen las imagenes positivas y negativas. Los imágenes positivas incluyen fiedad filial y amabilidad (por ejemplo, cuida a los ancianos y mantiene una estrecha conexión emocional con su grupo de viaje), riqueza y buena suerte (Por ejemplo, tiene mucho dinero para gastar y propina generosa.) pero las imagenes negativas incluyen las normas étias (por ejemplo, hace ruido fuerte y corta en línea.) los hábitos de higienes (por ejemplo, tira basura al azar y escupiendo por todas partes.) y cultura religiosa (por ejemplo, toca y trepa los estatuas de Buda.)

Esta investigación cualitativa cierra la brecha en los percepciones de los habitantes de desino de las imagenes de turistas en el contexto del turisimo emisor y comenza con los aspectos de los habitantes enriquece la aplicación de la teoría de la representación social en el campo de marketing turístico. Deja los habitantes tailanteses conocer a los turistas chinos más detallada y ayuda al gobierno a desarrollar pautas específicas de turismo civilizado y es benificioso para el futuro desarrollo sostenible de los destinos turísticos.

The purpose of this study is to develop luminescence sensors for the detection of nitroaromatic compounds (NACs) and metal ions to protect human health and prevent environmental pollution.

The composition and morphology of Eu-metal-organic frameworks (MOF) (1) were well characterized by powder X-ray diffraction, elemental analyses, Fourier-transform infrared spectroscopy, thermogravimetric analysis, X-ray photoelectron spectroscopy and scanning electron microscopy. The emission spectrum displays that 1 has significant characteristic emission bands of Eu(III) ions. The authors further investigated the fluorescence sensing performances of 1 to NACs and metal ions.

The results show that Eu-MOF (1) exhibits significant fluorescence quenching effect toward p-nitroaniline and Fe³⁺ ions with good stability and recyclability. This means that 1 can be used as a multifunctional sensing material for the detection of p-nitroaniline and Fe³⁺ ions.

The authors have successfully synthesized a fluorescence Eu-based sensing material under hydrothermal conditions. In addition, the fluorescence property and sensing performances for detecting NACs and metal ions were studied. The results suggest that 1 has highly selective fluorescence quenching toward p-nitroaniline and Fe³⁺ ions with not only high sensitivity and selectivity but also excellent stability and recyclability. Furthermore, this study has confirmed that the multifunctional MOF material is very useful in environment pollutants’ detection and monitoring.

In order to improve the engine reliability and efficiency, an effective way is to reform the turbine blade tip conformation. The paper aims to discuss this issue.

The present research provides several novel tip-shaping structures, which are considered to control the blade tip loss. Four different tip geometries have been studied: flat tip, squealer tip, flat tip with streamwise ribs and squealer tip with streamwise ribs. The tip heat transfer and leakage flow are both analyzed in detail, for example the tip heat transfer coefficient, tip flow and local pressure distributions.

The results show that the squealer seal and streamwise rib can reduce the tip heat transfer and leakage loss, especially for the squealer tip with streamwise ribs. The tip and near-tip flow patterns at the different locations of axial chord reflect that both the squealer seal and streamwise rib structure can control the tip leakage flow loss. In addition, the analysis of the aerodynamic parameters (the static pressure and turbine efficiency) also indicates that the squealer tip with streamwise ribs obtains the highest adiabatic efficiency with an increase of 2.34 percent, compared with that of the flat tip case.

The analysis of aerothermal and dynamic performance can provide a reference for the blade tip design and treatment.

The purpose of this paper is to build a phase-type risk model with stochastic return on investment and random observation periods to characterize the ruin quantities under which the insurance company may take effective investment strategies to avoid bankruptcy.

By the Markov property and Ito’s formula, this paper derives the integro-differential equations in which the interclaim times follow a phase-type distribution. Using the sinc method, this paper obtains the approximate solutions of the expected discounted penalty function. The numerical examples are given to verify the robustness of the proposed sinc method.

This paper discloses the relationship between the investment strategy and initial surplus level. The insurance company with a high initial surplus level prefers high risk portfolios to earn more profit. Contrarily, the insurance company would invest low risk portfolios to avoid bankruptcy. In addition, this paper shows that a short observation period would bring higher ruin probability.

The risk model is distinct in that a phase-type risk model is constructed with stochastic return on investment and random observation periods. These considerations in the risk model are in sharp contrast to the setting in which the stochastic return on investment is observed continuously. In practice, the insurance company only can periodically observe the surplus level to check the balance of the book. This setting, therefore, is difficult to adopt. This paper develops a sinc method to solve the approximate solutions of the expected discounted penalty function.

Vitamin D deficiency is prevalent worldwide. This paper aims to investigate the vitamin D status and dietary intake in young university students.

Forty-one healthy students aged 18–29 years from Coventry University UK were recruited during January-February 2019, including white Caucasians (n = 18), African-Caribbeans (n = 14) and Asians (n = 9). Plasma 25(OH)D concentrations were measured and dietary vitamin D intake was determined. Chi-square and simple linear regression were used to analyse the data.

The plasma 25(OH)D concentrations were (36.0 ± 22.2) nmol/L in all subjects, (46.5 ± 25.3) nmol/L in white Caucasians, (22.6 ± 7.4) nmol/L in African-Caribbeans and (37.4 ± 21.7 nmol/L) in Asians. The majority (85.7%) of African-Caribbeans were vitamin D deficient compared with 22.2% of white Caucasians and 33.3% of Asians (p = 0.001). Overweight/obese subjects showed a significant higher proportion of vitamin D deficiency (65%) than normal weight subjects (28.6%) (p = 0.04). The average dietary vitamin D intake in all subjects was (4.6 ± 3.9) µg/day. Only 12.1% of the subjects met the recommended dietary vitamin D intake of 10 µg/day. Dietary vitamin D intake (p = 0.04) and ethnicity (p = 0.01) were significant predictors of 25(OH)D levels and accounted for 13% and 18.5% of 25(OH)D variance, respectively.

This small-scale study showed an alarmingly high prevalence of vitamin D deficiency among subjects from African-Caribbean origin during wintertime. Education programs and campaigns are urgently needed to fight the vitamin D deficiency in this population.

The targeted population were in a critical period of transition from adolescence toward adulthood involving in changes in behaviours and nutrition.

This study aims to examine the significance of transformational leadership and social support for expatriate adjustment and performance. This study also extends relevant literature on expatriate management to examine the relationships among transformational leadership, social support, expatriate adjustment, and expatriate performance through a mechanism taking into account the moderating roles of cultural intelligence and socialization experience.

The sample was collected from 156 expatriate managers of Taiwanese multinational company (MNC) subsidiaries operating in China. Structural equation modeling (SEM) in AMOS 21 and hierarchical regression in SPSS 19 were used to test eight research hypotheses.

The SEM results indicated that transformational leadership and social support make significant contributions to expatriate adjustment and performance. The moderating roles of socialization experience and cultural intelligence were also confirmed in this study.

This study extends a theoretical model of transformational leadership and social support to examine expatriate adjustment and performance based on social learning and social exchange theories. Using a specific Chinese context, the current paper highlights the value and necessity of cross‐cultural adjustment for successful expatriation.

The potential implications of the three-dimensional printing (3DP) technology are growing enormously in the various health-care sectors, including surgical planning, manufacturing of patient-specific implants and developing anatomical models. Although a wide range of thermoplastic polymers are available as 3DP feedstock, yet obtaining biocompatible and structurally integrated biomedical devices is still challenging owing to various technical issues.

Polyether ether ketone (PEEK) is an organic and biocompatible compound material that is recently being used to fabricate complex design geometries and patient-specific implants through 3DP. However, the thermal and rheological features of PEEK make it difficult to process through the 3DP technologies, for instance, fused filament fabrication. The present review paper presents a state-of-the-art literature review of the 3DP of PEEK for potential biomedical applications. In particular, a special emphasis has been given on the existing technical hurdles and possible technological and processing solutions for improving the printability of PEEK.

The reviewed literature highlighted that there exist numerous scientific and technical means which can be adopted for improving the quality features of the 3D-printed PEEK-based biomedical structures. The discussed technological innovations will help the 3DP system to enhance the layer adhesion strength, structural stability, as well as enable the printing of high-performance thermoplastics.

The content of the present manuscript will motivate young scholars and senior scientists to work in exploring high-performance thermoplastics for 3DP applications.

The purpose of this paper is to conceptually explore the relationship between Entrepreneurship Education (EE) and undergraduate students’ self- and paid-employment intentions. Specifically, the paper aims to examine the effect of paid-employment intention on the relationship between EE and self-employment intention.

This paper reviewed extensively related literature on EE, entrepreneurial intentions and the theory of planned behaviour (TPB). The detailed literature review undertaken formed the basis for the development of the conceptual framework.

It is found that undergraduate students have two opposing employment intentions within them, namely, self- and paid-employment intentions. The two employment intentions interact and have a tendency to dominate each other, and consequently lead to different employment behaviours. The dominant employment intention determines whether a graduate will exhibit self- or paid-employment behaviour. This confirms that graduates are faced with two career paths or choices, namely, self- and paid-employment.

It is not an empirical paper. Thus, the conceptual framework needs to be further empirically tested. More specifically, the proposition that undergraduate students’ paid-employment intentions moderate the impact of EE on their self-employment intentions needs to be empirically validated.

This paper provides some insightful and practical implications for the government and the policymakers in the education sector, particularly in tackling the menace of graduate unemployment and its associated problems. It provides an insight into the problem of graduate unemployment. The government and the policymakers should initiate enlightenment programmes that will reorient undergraduate students away from having the mentality of securing paid-jobs after graduation. Equally, undergraduate students should be enlightened about the difficulties in securing paid-jobs and the benefits of being a self-employed graduate.

It is the first to explore the moderating effect of undergraduate students’ paid-employment intentions on the relationship between EE and their self-employment intentions. Therefore, it makes a valuable contribution to the existing literature on EE and entrepreneurial intentions. It further strengthens the TPB by applying it to explain how undergraduate students’ paid-employment intentions could neutralise the impact of EE on their self-employment intentions.