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The purpose of this study is to investigate the influence of varying concentrations of nano-SiO₂ particle doping on the structure and properties of the micro-arc oxidation (MAO) coating of 7075 aluminum alloy. This research aims to provide novel insights and methodologies for the surface treatment and protection of 7075 aluminum alloy.

The surface morphology of the MAO coating was characterized using scanning electron microscope. Energy spectrometer was used to characterize the elemental content and distribution on the surface and cross section of the MAO coating. The phase composition of the MAO coating was characterized using X-ray diffractometer. The corrosion resistance of the MAO coating was characterized using an electrochemical workstation.

The results showed that when the addition of nano-SiO₂ particles is 3 g/L, the corrosion resistance is optimal.

This study investigated the influence of different concentrations of nano-SiO₂ particles on the structure and properties of the MAO coating of 7075 aluminum alloy.

The purpose of this study is to examine the impact of MoS₂ on the microstructure and characteristics of micro-arc oxidized (MAO) ceramic coatings created on ZK60 magnesium alloy through the addition of varying concentrations of MoS₂ particles to the electrolyte, aiming to enhance the corrosion resistance of magnesium alloy.

The surface morphology, roughness and phase composition of the coatings were analyzed using scanning electron microscopy, a hand-held roughness tester and an X-ray diffractometer, respectively, and the corrosion resistance of the MAO coatings prepared by the addition of different contents of MoS₂ particles was tested and analyzed using an electrochemical workstation.

The results demonstrate that MoS₂/MgO composite coatings have been successfully prepared on the surface of magnesium alloys through micro-arc oxidation. Furthermore, the corrosion resistance of the ZK60 magnesium alloy prepared with the addition of 1.0 g/L MoS₂ was the best compared to the other samples.

MoS₂ particles were able to penetrate the coatings successfully during the micro-arc oxidation process, acting as a barrier in the micropores to prevent the corrosion medium from touching the surface, thus improving the corrosion resistance of the sample. The electrochemical workstation was used to study the corrosion resistance of the MoS₂/MAO coating on the ZK60 magnesium alloy.

This paper extends the institution theory to examine the relationship between high-performance work system (HPWS) and organizational performance (OP), and analyzes how country of origin interacts with performance measures and industrial affiliation in moderating the HPWS–OP relationship.

The paper collects data of 60,142 firms and establishments in 252 studies published up to December 2021 and employs meta-analysis techniques to test hypotheses on the role of country of origin in moderating the HPWS–OP relationship in conjunction with performance measures and industrial affiliation.

The paper finds that, firstly, there is a positive relationship between HPWS and OP, but the relationship is much stronger in developing than advanced countries. Secondly, the relationship is stronger when OP is measured in operational than financial term in both developing and advanced countries, but the moderating effect of performance measures is stronger in developing than advanced countries. Thirdly, the relationship is stronger in service than manufacturing industries in developing countries, but no such variation is found in advanced countries.

The study for the first time unveils the important role of country of origin in interacting with performance measures and industry affiliation to condition the HPWS–OP relationship, and provides a coherent explanation based on institutional theory. The study sheds fresh light on the HPWS–OP relationship, and has important implications for managers.

With the rapid development of paid online social question and answer (Q&A) communities, monetary social functions have been introduced and have potential benefits for both platforms and users. However, these functions' impact on knowledge contribution remains uncertain. This study proposes a conceptual model based on the stimulus–organism–response framework, according to which monetary and non-monetary social functions can help nurture short-term and long-term relationships among community users, and thereafter improves social identity and knowledge-sharing intentions.

This study selects Zhihu, a famous online social Q&A community in China, and conducts an online survey to collect data from its frequent users. A sample of 286 valid questionnaires was collected to test our research model by using a structural equation modeling method. In addition, a bootstrapping approach is used to test the mediation effect.

Results indicate that monetary social functions help nurture short-term and long-term relationships among community users. However, non-monetary social functions only affect short-term relationships directly. Short-term and long-term relationships both have a positive relationship with social identity and thereafter improve users' knowledge-sharing intentions.

This study focuses on users' knowledge-sharing intentions in Q&A communities from the perspective of social. Specifically, we separated social functions in Q&A platforms into monetary and non-monetary ones and explored their impact on the development of short-term and long-term relationships. Results demonstrate the importance of monetary social functions and explain how monetary and non-monetary social functions affect users' knowledge-sharing intentions in different approaches.

This study aims to investigate the perceived benefits arising from tourist activities at natural disaster sites, to analyze the influence of perceived benefits on satisfaction and behavioral intentions and to identify origin region’s moderating role.

A research model containing dark tourism motivations (DTMs), tourist perceived benefits (TPBs), tourist satisfaction (TS), protection intention (PI) and loyalty intention (LIs) was developed, and visitor origin was introduced as a moderating variable. Taking the 5·12 Wenchuan Earthquake Memorial Museum as a case site, data were obtained by distributing questionnaires on-site, and the model was tested using partial least squares-structural equation modeling (PLS-SEM).

DTMs had a significant effect on cognitive and affective benefits, and TPBs significantly affected TS, PI and LIs, with satisfaction playing a partial mediating role. The origins of tourists showed a moderating role in part of the influence relationship of perceived benefits.

This study explored the perceived benefits among dark tourists and built a research model of their influence on tourist satisfaction and behavior. This study not only provides suggestions for managers related to dark tourism development in natural disaster areas, but also offers the possibility of enhancing tourist dark tourism experiences by interpreting the psychology and behavior of dark tourists.

This research adopted a new perspective of the decision-making behavior of dark tourists. The perceived benefits arising from visiting natural disaster sites were analyzed and the relationships between TBSs and motivation, TS, PI and LIs were examined. Considering the specificity of dark tourism emotions, the research also analyzed the similarities and differences in the psychology and behavior of locals and non-locals in dark tourism. The research results enrich and deepen the theoretical study of dark tourism.

本文旨在探讨游客在自然灾难遗址地进行旅游活动时产生的感知收获, 分析感知收获对游客满意度和行为意向的影响, 并识别来源地在其中的调节效应。

构建了一个包含旅游动机、感知收获、满意度、保护意愿和忠诚意向等多个变量在内的研究模型, 并引入游客来源地作为调节变量。而后, 选取5·12汶川特大地震纪念馆作为案例地, 通过现场发放问卷的形式获取数据, 并采用PLS-SEM对模型进行了检验。

旅游动机对认知收获和情感收获均具有显著影响; 感知收获显著影响满意度、保护意愿和忠诚意向, 同时满意度在上述影响关系中呈现部分中介作用; 游客来源地在感知收获的部分影响关系中（旅游动机→感知收获、感知收获→保护意愿）呈现出一定的调节作用。

文章采用了一种新的视角来研究自然灾难遗址地游客的行为决策机制。通过实证数据分析了游客的感知收获, 并进一步考察了其与旅游动机、满意度、保护意愿和忠诚意向之间的影响关系。考虑到灾难遗址地旅游的独特情感特征, 文章还分析了不同来源地（本地—非本地）的游客在旅游过程中呈现出的心理与行为差异。本研究能在一定程度上丰富和深化黑色旅游的理论研究。

Este estudio persigue investigar los beneficios percibidos derivados de la actividad turística en lugares afectados por catástrofes naturales, para así analizar la influencia que dichos beneficios ejercen sobre la satisfacción y el comportamiento planificado, e identificar el papel moderador de la región de origen.

Se elaboró un modelo de investigación que contiene las variables de motivación por el turismo oscuro, beneficio percibido, satisfacción, protección e intenciones de lealtad, así como la variable moderadora origen. Tomando como área de investigación el Museo Conmemorativo del Terremoto de Wenchuan 5.12, los datos fueron obtenidos distribuyendo cuestionarios in situ. La técnica de análisis de datos aplicada fue el Modelado de Ecuaciones Estructurales de Mínimos Cuadrados Parciales (PLS-SEM)

La motivación por el turismo oscuro tuvo un efecto significativo en los beneficios cognitivos y afectivos, y los beneficios percibidos afectaron significativamente a la satisfacción, protección e intenciones de lealtad, siendo la satisfacción lo que desempeña un papel mediador parcial. El origen de los turistas mostró un papel moderador en cuanto a la relación de influencia de los beneficios percibidos.

Esta investigación adoptó una nueva perspectiva en el comportamiento de toma de decisiones en los turistas de turismo oscuro, analizó los beneficios percibidos del turismo de oscuro en los lugares donde se produjeron las catástrofes naturales, y examinó la relación entre los beneficios percibidos y la motivación, la satisfacción, la protección y la intención de lealtad. Teniendo en cuenta la especificidad de las emociones del turismo oscuro, la investigación también analizó las similitudes y diferencias entre la psicología y el comportamiento de los turistas locales y no locales en lo respectivo al turismo oscuro. Los resultados de la investigación enriquecen y ofrecen un acercamiento más profundo a los estudios teóricos del turismo oscuro.

Tactile sensation is an important sensory function for robots in contact with the external environment. To better acquire tactile information about objects, this paper aims to propose a three-layer structure of the interdigital flexible tactile sensor.

The sensor consists of a bottom electrode layer, a middle pressure-sensitive layer and a top indenter layer. First, the pressure sensitive material, structure design, fabrication process and circuit design of the sensor are introduced. Then, the calibration and performance test of the designed sensor is carried out. Four functions are used to fit and calibrate the relationship between the output voltage of the sensor and the contact force. Finally, the contact force sensing test of different weight objects and the flexible test of the sensor are carried out.

The performance test results show that the sensitivity of the sensor is 0.93 V/N when it is loaded with 0–3 N and 0.23 V/N when it is loaded with 3–5 N. It shows good repeatability, and the cross-interference between the sensing units is generally low. The contact force sensing test results of different weight objects show that the proposed sensor performs well in contact force. Each part of the sensor is a flexible material, allowing the sensor to achieve bending deformation, so that the sensor can better perceive the contact signs of the grasped object.

The sensor can paste the surface of the paper robot’s gripper to measure the contact force of the grasping object and estimate the contour of the object.

In this paper, a three-layer interdigital flexible tactile sensor is proposed, and the structural parameters of the interdigital electrode are designed to improve the sensitivity and response speed of the sensor. The indenter with three shapes of the prism, square cylinder and hemisphere is preliminarily designed and the prism indenter with better conduction force is selected through finite element analysis, which can concentrate the external force in the sensing area to improve the sensitivity. The sensor designed in this paper can realize the measurement of contact force, which provides a certain reference for the field of robot tactile.

This study aims to examine the performance and volatility of Turkey Real Estate Investment Trusts (Turkish REITs) as the world is adjusting to the new normal situation in every aspect of REITs' business activities.

The prices of REITs were acquired from 26 Turkish REITs in this study, but owing to autocorrelation difficulties, 14 Turkish REITs were employed in the analysis. The ten-year long-term bond of the Turkish Government was also utilized and the period of data obtained was based on availability. The performance of Turkish REITs was evaluated using Sharpe's ratio and Treynor's ratio, and the volatility was assessed using MGARCH-BEKK.

The authors found out that Turkish REITs are constantly underperforming and the REITs' returns remain highly volatile and persistent. In addition, findings showed evidence of volatility clustering and the asymmetric impact of shocks. This study further revealed the uniqueness of each of the Turkish REITs due to the lack of evidence of multicollinearity.

However, the limitation of this study is the constraint in obtaining more macro-economic variables of more than ten-years of Turkey's Government bond and the study focused mainly on Turkish REITs.

The result suggests that since Turkish REITs are not mandatory to payout 90% of taxable earnings as dividends, high performance and an appropriate risk management approach are expected. The need for timely revealing performance of T-REITs and associated uncertainty may trigger better performance as discussed in the relationship between disclosure and performance which is recently emphasized in a recent study by Koelbl (2020). With current performance and associated uncertainty in Turkish REITs, the need to protect Turkish REITs investors is highly essential. The result further educates REIT investors that diversification benefits of REITs tend to reduce in extremely risky situations.

This is the first study in the context of Turkish REITs that comprehensively integrated market capitalization of REITs and simultaneous evaluation of performance and the volatility of the Turkish REITs as the world adjusts to the new normal.