bluuebunny/crossref_metadata_2025 huggingface dataset:
Research on the Tourism Efficiency in Guangxi —— Based on DEA-Malmquist Model
Authors: Wenhua Li
Published: April 2021

Taking 14 cities in Guangxi Zhuang Autonomous Region, where the typical ethnic minorities gather in harmony in China, as the research objects, the DEA-Malmquist model is used to dynamically analyze the tourism efficiency of 14 cities in Guangxi from 2004 to 2018. The results show that the total factor productivity of the overall tourism industry in Guangxi Zhuang Autonomous Region is unevenly distributed, and the regional gap is large, but the overall growth trend is maintained; the changes in the technical progress index and the total factor productivity change index are generally consistent, and the improvement of technological progress is the most effective way to promote the efficiency growth of tourism in Guangxi Zhuang Autonomous Region. The main driving force are economic development level, geographic location, tourism development policy, tourism resource endowment and other factors have varying degrees of influence on the tourism efficiency in Guangxi. Finally, this article draws relevant conclusions based on the results of empirical analysis, and put forward relevant suggestions for the development of tourism in Guangxi.
Research on the impact of new energy automobile industry alliance development status on technological innovation
Authors: Dewei Zou
Published: April 2021

With the increasing pressure on the ecological environment, the continuous progress of science and technology and the government’s policy support for the new energy industry, the development momentum of China’s new energy automobile industry is strong. However, the emerging industry still faces major obstacles in terms of technological innovation, standard-setting and marketization. In the face of these obstacles, industrial alliances, as an organizational form, have been widely used in the new energy vehicle industry in order to seek the risk sharing and cooperation effect of alliances. In this paper, on the basis of identifying the members of China’s new energy automobile industry alliance and based on the classification theory of industrial alliance, China’s new energy automobile industry alliance is divided into horizontal alliance and vertical alliance. In addition, this paper adopts the method of case study to put forward reasonable suggestions for the shortcomings existing in the development status of China’s new energy vehicle industry alliance, so as to promote the technological innovation of the industry alliance.
R&D project risk management research
Authors: Yu Pang
Published: April 2021

after the 19th National Congress of the Party, with the acceleration of the construction of the new national infrastructure and the changing competitive situation of the market environment, the enterprises are challenged, which forces them to improve the R&D project management and improve the process effect and benefit. Among them, as an important part of controlling R&D project activities, project risk management has become a key concern. Therefore, risk management for R&D projects needs to be addressed through a series of measures to control risks, such as risk identification, risk evaluation, risk response and risk monitoring. Therefore, it is necessary to master its risk characteristics and target identification management points before studying R&D project risk management. In order to better identify and respond to the various risks in the project process.
Research on Financial Market Risk Based on GARCH-M Model
Authors: Sun Tieshuang
Published: April 2021

Since 1970, with the gradual acceleration of economic globalization and the rapid development of information technology, the financial market has become increasingly unstable. Therefore, we must enhance our competitiveness in the financial market, enhance our ability to resist risks, and master effective measures such as measuring risks. In this paper, GARCH-M model and VAR method are used to study the value at risk of financial market and make an empirical analysis. Firstly, the VAR value calculation method based on GARCH-M model under generalized error distribution is given. Secondly, the closing price of Shanghai Stock Exchange Index is selected as sample data, and Eviews software is used to analyze its characteristics. The results show that the logarithmic yield series of the closing price of Shanghai Stock Exchange Index is not normally distributed, and the series has fluctuation aggregation effect, autocorrelation effect and heteroscedasticity effect. Finally, GARCH-M model is established, and VAR estimates at 95% and 99% confidence levels are calculated and tested. The results show that GARCH-M(1,1) model is more suitable for estimating the risk of logarithmic return rate of closing price of Shanghai Composite Index.
Research on the Supervision Mode of Competitive State-owned Enterprises by State-owned Capital Investment and Operation Companies
Authors: Shui-li Yang , Ye Tian , Yi Yang
Published: April 2021

In the process of transformation of supervision of competitive state-owned enterprises, the problems that there is a blind spot in the supervision object, the lack of joint forces of the supervisory bodies, the lack of links in the supervision process, and the difficulty in appraising the supervision results have appeared in the supervision of competitive state-owned enterprises. Based on the above issues, this paper designs on the supervision of competitive state-owned enterprises,including coordinating supervision objects through governance supervision and assessment, linking supervisory entities through function coordination and achievement sharing, linking the supervision process through information supervision and platform cooperation and implementing supervision results through risk control and evidence inspection.
Research on the development level of science and technology service industry under the information economy
Authors: Shan Jinrong
Published: April 2021

As a transfer station between economic development and technology, science and technology service industry is an important guarantee for the state to provide services under the strategy of science and technology Innovation. However, in the information age, the development of the industry will be affected by what factors need further in-depth study, this paper based on existing literature, in the original evaluation index system of the development level of science and technology service industry, the information related index is added, and 31 provinces in China are factorial analyzed by using SPSS Statistical Software, and the comprehensive scores of each province and city are calculated and ranked, in order to put forward countermeasures and suggests.
Research on the Interactive Development of Dong Village Cultural Heritage Protection and Night Tourism: a Case Study of Huangdu Dong Village in Hunan
Authors: Tian Mengyao , Zheng Wenjun , Wang Na
Published: April 2021

Under the policy of cultural tourism integration, the huge economic and social benefits brought by night tourism are gradually recognized. Based on the compatibility, in response to the needs of cultural heritage protection and night tourism development in the Southwest Dong area, a driving mechanism for night tourism and cultural heritage live protection with the spirit of place as the core is proposed. Taking the Huangdu Dong Village in Hunan as an example, the research explored the traditional night culture of Dong Village, analysed the development status of night tourism, and proposed interactive development strategies for Dong Village night tourism and cultural heritage protection, which will help the destination resource allocation shift from space expansion to time expansion and accelerate its innovative development on the basis of the protection of the authenticity of cultural heritage. The research has certain reference significance for the survival of traditional culture and the innovative development of tourism in ethnic minority villages.
Analysis on the New Development Directions of Dalian Forest Zoo Based on Animation IP Plus Tourism
Authors: Cao Yang
Published: April 2021

At present, the deep integration and rapid development of cultural and tourism industries are bound to pose certain requirements for world-renown tourist cities, such as Dalian. While zoos have become important scenic spots in a city, these two industries have to take the lead in the city’s development. By analyzing the problems and deficiencies in the development course of Dalian Forest Zoo, this paper found out the countermeasures that integrated animation IP into cultural tourism to solve the existing problems and realized the value of the tourist attraction in the hope of providing new ideas and references for the development of related scenic spots.
Integration As the Rationale, Diversification As the Orientation: Research on the Driving Force of the Integrated Development of Sports Tourism and Industrial Construction
Authors: Yu Kewei , Chen Jingjing , Yuan Ting
Published: April 2021

The deep integration and integrated development of sports tourism is the core manifestation of broadening the mass consumption space, increasing mass consumption options, and promoting industrial transformation and upgrading. It is also the key choice for integrating high-quality resources and creating a composite industrial form. Under the promotion of Healthy China, sports tourism with multiple functions such as fitness and self-cultivation and health preservation needs to use industrial integration as the mechanism and diversified development as the direction to create a new pattern of in-depth integration of “sports + tourism”, and continue to explore broader Development extension. The article takes sports tourism as the research object, discusses its integrated development dynamics and practical difficulties, and puts forward industrial construction suggestions.
Adsorption of sulfamethoxazole by wheat straw-derived biochars in seawater
Authors: Zhao Man , Shao Mengying , Ma Xiaohan
Published: April 2021

The excessive use of antibiotics in mariculture have resulted in high pollution burdens of antibiotics in marine environment. Biochars, as promising adsorbents, have been widely used in organic pollutant adsorption because of their good adsorption performance and stability. However, adsorption characteristic of antibiotics in seawater by biochar is not well known. Thus, the batch experiment for the adsorption of sulfamethoxazole (SMX) was conducted using wheat straw-derived biochars and graphite (GR) under different initial concentration of SMX and different addition of adsorbent in seawater. The results showed that the wheat straw-derived biochars produced at 700 °C was the optimal adsorbent with the maximum removal rate (R) of 70.3%, the maximum adsorption capacity (Qe) of 1.03 mg g-1 and the maximum adsorption coefficient (Kd) of 0.182 L g-1. The Qe values increased with increasing the initial concentration of SMX, while R and Kd values of SMX decreased. The R values of SMX increased with the increasing dosage of adsorbents, while Qe and Kd values of SMX decreased. These findings will shed new light on the environmentally-friendly and low-cost adsorbent for controlling the antibiotic pollution in marine environment.
Existence of microplastics in soil and groundwater in Jiaodong Peninsula
Authors: Su Sheng , Zhou Sifan , Lin Guoqing
Published: April 2021

Microplastic pollution has become a major global problem demanding prompt solution. So far, most research has focused on marine environment, but there is a lack of information about microplastic distribution, and persistence uptake in coastal soil environment. In this study, the Huangshui River Basin in Laizhou Bay and Dagu River Basin in Jiaozhou Bay of Shandong Province of China was taken as the research area. A total of 3,352 microplastic items were collected from 12 samples from the four sites in this study. The results showed that local soil was already affected by microplastics, of which 92.9% were particles, 6.1% were fibers, and only 1% were films. The existence of film PE indicated that the microplastic pollution in soil probably came from the plastic film. The degree of pollution was correlated with the size, and the size of microplastics was negatively correlated with abundance. Only a few labelled fibers were detected in groundwater samples, which may come from the external environment. This study contributes to a deeper understanding of environmental microplastic pollution in the coastal region.
Increased production of alkaline polygalacturonate lyase in the recombinant WB43CB by optimizing the medium
Authors: Zhang Junjiao , Zhang Junli
Published: April 2021

Alkaline polygalacturonate lyase (PGL), which was the central enzyme of green environmental enzyme treatment technology, has been widely used in textile, papermaking and beverage production. In the previous work, Bacillus subtilis was used as the expression host, and the PGL gene derived from B. subtilis WSHB04-02 was successfully expressed in the engineered strain WB43CB by regulating of molecular elements such as signal peptide, promoter and SD sequence. In this study, the fermentation medium was optimized from four aspects of carbon source, nitrogen source, liquid volume and inoculum volume, and the extracellular PGL enzyme activity in WB43CB increased from 264.5 U·mL-1 to 461.96 U·mL-1, which laid a solid foundation for the industrial production of PGL.
Characteristics of Economic Growth in Guizhou and its Inspiration to PM2.5 Control
Authors: Zong Jizhang , Li Song , Bai Yi
Published: April 2021

Guizhou province, one of the poorest provinces in China, has attracted the state’s close attention. The work selected such data of GDP, per-capita GDP, and industrial structure from Guizhou Statistical Yearbook and Guiyang Statistical Yearbook from 1995 to 2019. Then the spatiotemporal characteristics of county region economy were studied using several methods including spatial autocorrelation (Moran’s I), and standard deviation coefficients based on GIS. The results showed that Guiyang and Zunyi were the centers of economic growth in Guizhou. There was a regional differentiation that the growth of county GDP lowered from northwest to southeast. The industrial structure changed significantly in Guizhou’s county level in 2005 and 2009, and ITI was 6.7 and 8.3, respectively. There was a noticeable tendency that developed counties had low ITI. In contrast, spatiotemporal characteristics of per-capita GDP growth were more complex, and these counties of high per-capita GDP disbursed over a wide region of the Guiyang- Zunyi industrial zone. Finally, we analyzed the enlightenment on PM2.5 control in Guizhou.
Food Waste in Developed Countries and Cold Chain Logistics
Authors: Li Hongwei , Pan Peng
Published: April 2021

Food waste is a tough and profound question in the world. Although the development of agricultural technology has effectively promoted the increase of vegetable and fruit production, one-third of global vegetable and fruit production are still wasted. This issue is caused not only by food overproduction or overstock, but also by customers’ requirements for fresh products. This paper aims to thoroughly explore the reasons for food waste and provide some solutions to solve this problem, especially from the “Agri-fresh produce supply chain management” perspective. Solutions include improving the cold-chain logistics system and intelligent methods. To clearly analyze reasons for food wastey, this paper interprets the issue from three dimensions (customer, food supply chain, and farm) and then explores solutions.
Influence of social media marketing in building relationship between brand loyalty of tourism products and products service quality
Authors: Jiaqi Yan , Teo Brain Sheng-Xian , Tingting Li , Jiaxun Zhang
Published: April 2021

Social media is an influential objective for most industries. Organizations in every sector are willing to implement this technique for achieving several business goals. Some of them are brand loyalty and service quality. The current study analyses these specific objectives in the tourism sector. The AIDA model has been considered in this scenario, where five hypotheses are generated. Instagram has been selected as the selected social media platform, as 45% of respondents preferred it. The study includes a primary research method surveying 51 respondents and evaluating the quantitative data using SPSS. The KMO and Bartlett’s Test indicated a reading of 0.932, which describes the reliability of the sample. The statistical value provides that there is a strongly positive relation (R-0.960; R2-0.922; 92.2%) between tourism brand and product quality in the sector. On the other hand, through Cronbach’s alpha, the results came as 0.997, which shows the high level of consistency between the variables. It has been further analysed that brand awareness, brand loyalty, and tourism product service are integral part of business objects that are related to social media marketing.
Study on the impact of multidimensional proximity on the innovation of tourism industry cluster
Authors: Hua Zhang , Peng Sun
Published: April 2021

This article from the perspective of regional economics and human geography, tries to explore the influence mechanism of tourism industry cluster innovation by using the latest research results of “proximity” in the west. Based on the analysis of relevant theories, This paper proposes relevant research hypotheses, which enriches the theories related to proximity and industrial cluster innovation and lays a theoretical foundation for exploring the essential factors affecting the innovation of tourism industry cluster.
Strategies for Promoting the Value of Tourist Cultural and Creative Brands Based on Cultural Elements
Authors: Zhao Chunhua
Published: April 2021

Tourist cultural and creative brands are the condensation of culture, history, design and commerce. In the collision and blending of culture and commerce, it forms unique competition advantage. The developers of tourist cultural and creative products, based on the cultural core, explore and construct the symbolic meaning, and help tourists to complete the aesthetic journey from viewing to purchasing and then to cultural experience. In the brand strategy, developers should base on the cultural foundation, construct symbolic meaning and cultural image, and implant cultural association into products through traditional cultural inheritance and innovation, so as to arouse consumers’ cultural identity and strengthen the brand value.
Research on the path of revitalizing rural tourism from the perspective of smart tourism
Authors: Zhao Lei , Zhang Die
Published: April 2021

Smart tourism is a highly systematic, efficient and convenient tourism mode. The development of rural tourism should evolve in the Internet era, and explore the industrial path of smart rural tourism. This paper discusses the developing opportunity of rural tourism in perspective of smart tourism, studies the developing status of rural tourism in the context of smart tourism, shape rural tourism by using the Internet information mode, and finally summarizes the development path of smart rural tourism.
Preliminary Conception of Financial Decision Knowledge Engineering
Authors: Qiu Linhui
Published: April 2021

In the era of digital economy, the intelligence of enterprise financial management has an important influence on the effect of enterprise financial activities. At present, the application of intelligent financial system and software focuses on providing analysis information for financial decision-making, and cannot effectively give complete financial decision-making suggestions, nor does it combine with enterprise strategy. This paper puts forward the idea of constructing knowledge engineering of financial decisionmaking based on frame, and uses frame representation to express the knowledge of financial decisionmaking and enterprise strategy, so as to promote the combination of intelligent financial decision-making and enterprise strategy, and promote the intelligence of enterprise financial decision-making through knowledge engineering.
Research on accounting information sharing mechanism from the perspective of national governance
Authors: Jilin Qu , Yicai Zhu
Published: April 2021

Accounting information sharing plays an important role in giving full play to the resource allocation effect of accounting information and promoting the modernization of national governance. It is one of the main tasks of the 13th five year plan for accounting reform and development of the Ministry of finance to establish a public service platform for social accounting information based on the disclosure of financial report data. In view of a series of problems brought about by the current accounting information multi submission, different caliber, mutual independence and non sharing, this paper discusses the mechanism and implementation path of accounting information sharing from the perspective of national governance, and puts forward a vertical through, horizontal interaction, internal integration and national unified accounting information sharing service system. Through the establishment of accounting information platform, accounting information can be “Count one, share resources”.
Based on the background of information technology, the integration of agricultural product processing industry and green ecological industry in Gansu Province
Authors: Ying Miaojing
Published: April 2021

Driven by the development of informatization, it is necessary to integrate the agricultural product processing industry and the green ecological industry in Gansu Province. The green ecological industry is the characteristic of both the integrated green industry and the informationized ecological industry. Based on the analysis of the current situation of the agricultural product processing industry in Gansu Province, this paper uses the analytic hierarchy process to select 14 indicators for measurement, and summarizes the future development potential of the agricultural product processing industry in Gansu Province according to the ranking level in 23 provinces and cities.
The Dilemma of Ideological and Political Education for Normal College Students Majoring in All General Subjects of Rural Primary Schools and Its Countermeasures under the Background of “Internet Plus” -- Taking Guangxi K College as an example
Authors: Yanfei Lei
Published: April 2021

Based on directed normal junior college students of Guangxi K College, who have graduated from high schools, this paper analyzes the characteristics of normal college students majoring in all subjects of rural primary schools, and puts forward three dilemmas of ideological and political education under the background of the widespread use of the Internet, namely, the ideological and political education is still mainly conducted by teachers, the “Internet Plus” ideological and political education system needs to be innovated, and the “Internet Plus” vocational ideal education is insufficient. In this paper, three ways are put forward to solve the problems, namely, taking students as the main body to build internet platforms, innovating the ways and methods of “Internet plus Ideological and Political Education”, and using the internet to strengthen students’ vocational emotion education.
Research on continuous improvement of teaching quality of entrepreneurship education in Colleges and Universities Based on QFD theory
Authors: Cao Yonghui , Jiang He
Published: April 2021

Taking local colleges and universities as an example, this paper explores the teaching design and process quality assurance system of entrepreneurship education with the help of quality function deployment theory, starting from the needs of customers and local society, and puts forward the quality function deployment model of entrepreneurship education curriculum, so as to provide theoretical support for our country to cultivate qualified entrepreneurship talents.
Research on the Deep Integration of Ideological and Political Theory Course and Student Work in Colleges and Universities
Authors: Yanfei Lei
Published: April 2021

The teaching of ideological and political theory course and student work are important components of ideological and political work in colleges and universities. Currently, there are problems emerging from ideological and political education on college students, including separation of education concepts, absence of management mechanisms, disconnection between theory and practice, and ineffective integration of the work team with estrangement. This paper focused on facilitating the deep integration of ideological and political theory course, and student work to enhance the effectiveness of ideological and political work in colleges and universities through continuous improvement of cultivation mechanism, reform of teaching education and methods, proactive exploration of practical teaching modes and deep integration of teaching teams, etc.
Exploring the Export Strategy of Chinese Film and TV Drama in Value Chain and Digital Technology
Authors: Kang Hongzhe , Yasin Megat Al Imran , Osman Mohd Nizam , Ang Lay Hoon , Li Mengyu
Published: April 2021

The spiritual and cultural needs of residents have been a growing trend with the living standards improving in China. As an essential medium to reflect the social status, film and TV drama need to satisfy the spiritual and cultural needs of residents as well as spread positive energy to society. The Silk Road International Film Festival was founded in 2014 under the Belt and Road Initiative, which created more opportunities for the export of Chinese film and TV drama. Although the value chain and digital technology can support the export of Chinese film and TV drama, some problems still exist. This paper analyzes the value chain status of film and TV drama and the digital technology of visual effects. Moreover, this paper describes the export status of Chinese film and TV drama and puts forward some suggestions.
Research on the application of 5G technology in the cultivation and construction of educational informatization innovation and entrepreneurship ability
Authors: Zhao Yang
Published: April 2021

With the increasing popularity of education informatization and the emergence of intelligent learning space, students’ demand for personalized, convenient and diversified learning content of innovation and entrepreneurship ability is becoming increasingly prominent. The fifth generation mobile communication (5G) technology is characterized by its large bandwidth, ultra-high reliability, ultra-low delay and large-scale Internet of things. College Students’ innovation and entrepreneurship education is the main theme of modern higher education and an important way to promote the transformation and development of local colleges. The quality of business plan and roadshows is one of the important means of financing for start-ups. Improving the ability of college students to write high- quality business plans and develop roadshows is not only conducive to the scientific evaluation and assessment of students’ ability, but also helps to stimulate the enthusiasm of college students for innovation and entrepreneurship, and cultivate their ability of innovation and entrepreneurship. Combined with the characteristics of contemporary college students’ innovation and entrepreneurship education, this project analyzes the problems existing in college students’ business plan writing and roadshow at this stage, and puts forward the establishment of an innovation and entrepreneurship ability training system based on the rapid development of business plan and roadshow, so as to promote the improvement of College Students’ innovation and entrepreneurship ability and provide a strong guarantee for deepening the reform of innovation and entrepreneurship education in Colleges and universities.
The Characteristics of the Nursing Organizational Management Highlighted by COVID-19
Authors: Fu Pingting , Mai Jia-ming , Xiang Yang
Published: April 2021

The COVID-19 outbreak has raised awareness of the importance of increased motivation and resilience in nurses. To explore the level of nurse Job involvement in Z hospital in Zhuhai city of China, and the influence of Organizational justice and Organizational identity, a total of 125 nurses in Z hospital in Zhuhai city, Guangdong province, were selected by convenient sampling method and investigated with general information questionnaire, Organizational justice, Organizational identity,and Job involvement Scale. There were 114 valid questionnaires returned; The scores of nurse’s Organizational justice, Distributive justice, Procedural justice and Interactive justice, Organizational identity,and Job involvement were 3.532±0.581, 3.397±0.691, 3.487±0.729, 3.840±0.641 and 3.912±0.615 respectively. The score of organization justice positively correlated with the scores of Organizational identity (r=0.627, P<0.001), and positively correlated with the score of Job involvement (r=0.627,P<0.001). The scores of Organizational identity were positively correlated with the score of Job involvement (r=0.724,P<0.001). The results of regression analysis showed that Organizational justice, Organizational identity can positively affect nurses’ Job involvement, and explained 59.9% of the cumulative variance. At the same time,Organization identity played a partial mediating role between Organizational justice, as well as its three sub-dimensions and Job involvement. The scores of Organizational justice and Job involvement in selected nurses in Zhuhai are only a little higher than the average levels, which needs to be improved. The perceived Interactive justice is high while the Distributive justice is low. Nurses’ Job involvement and Organizational identity can be promoted directly by increasing Distributive justice, followed by Interactive justice and Procedural justice.
Research on the Influence of In-work Embedding on Employees’ Constructive Deviant Behavior
Authors: Gu Jiajun , Cheng Bang
Published: April 2021

This paper takes the identity theory as the theoretical background, adopts the empirical research method, takes the embedded work of employees as the antecedent, studies the constructive deviant behaviour of employees, and explores the intermediary mechanism of the identity perception of insiders from the perspectives of role identity. This research use SPSS25.0 version and Mplus 7.0 to analyse the date, some conclusions are as follows: 1) Employees’ embeddedness in work has a significant positive effect on constructive deviant behavior.2) In-work embedding improves the role identity of employees, and has a significant positive impact on employees’ perception of insider identity.3) Insider identity perception play a intermediary role between employees’ embeddedness in work (in-work link, in-work match, in-work sacrifice) and constructive deviant behaviour. Starting from the perspective of double identity, this study has enriched the research on constructive deviant behaviour and provided beneficial reference for organizations to give play to the constructive power of employees in practice.
Research on Supply Chain Optimization of a T Enterprise Based on the Simulation Analysis of Subject Behavior
Authors: Lu Haodong , Li JiaQi , Shao Hongyu , Chen Yongliang
Published: April 2021

The manufacturing of the automobile industry is highly dependent on market demand. Therefore, the impact of changes in demand on the supply chain is worthy of attention. This article considers the application of flexible production management to the supply chain of the automobile industry. Simulation analysis research analyzes the overall impact of the differences in the behavior of different entities in the supply chain on the overall supply chain. By examining the possible consequences of these impacts, it provides targeted supply chain optimization suggestions and measures to promote the continuous optimization and development of the enterprise supply chain.
Influence of environmental factors on the characteristics of macrobenthic communities in soft bottoms around coral reefs of Larak Island (Persian Gulf)
Authors: Tavanayan Shima , Sharifian Sana , Kamrani Ehsan , Seddiq Mortazavi Mohammad , Behzadi Siamak
Published: April 2021

The effective conservation of coastal ecosystems including soft bottoms around coral reefs of Larak Island, Persian Gulf, is requiring basis data on community structure at different relevant spatial scales. In this regard, the diversity and the abundance of the macrobenthic communities in soft bottoms around coral reefs of this area were described in relation to different environmental factors. A seasonal sampling was conducted at two stations located in the east and west of Larak Island, respectively, during 4 seasons, from spring to winter 2012. A total of 20 species which belong to 20 genera and 14 families were identified. The macrobenthic density showed significant differences among seasons. The Shannon-Wiener index ranged from 2.07 to 2.89 indicating a moderate diversity in both stations. The maximum diversity of macrobenthic organisms was observed during spring. A non-metric multidimensional scaling (NMDS) analysis showed a large overlap in the macrobenthic community structure between the two stations. A principal component analysis (PCA) analysis indicated that the main environmental factors controlling macrobenthic density were phosphate, dissolved oxygen and total organic matter (TOM). Our results indicated that coral macrobenthic communities in Larak Island were characterized by low density and uniform distribution of species.
A non-conforming dual approach for adaptive Trust-Region reduced basis approximation of PDE-constrained parameter optimization
Authors: Keil Tim , Mechelli Luca , Ohlberger Mario , Schindler Felix , Volkwein Stefan
Published: April 2021

In this contribution we propose and rigorously analyze new variants of adaptive Trust-Region methods for parameter optimization with PDE constraints and bilateral parameter constraints. The approach employs successively enriched Reduced Basis surrogate models that are constructed during the outer optimization loop and used as model function for the Trust-Region method. Each Trust-Region sub-problem is solved with the projected BFGS method. Moreover, we propose a non-conforming dual (NCD) approach to improve the standard RB approximation of the optimality system. Rigorous improved a posteriori error bounds are derived and used to prove convergence of the resulting NCD-corrected adaptive Trust-Region Reduced Basis algorithm. Numerical experiments demonstrate that this approach enables to reduce the computational demand for large scale or multi-scale PDE constrained optimization problems significantly.
Onkologische Rehabilitation und Entwicklung von Strategien in Krisensituationen am Beispiel der Covid-19-Pandemie im Jahr 2020 unter Berücksichtigung einer Patienten- und Mitarbeiterbefragung
Authors: Leibbrand Birgit , Seifart Ulf
Published: April 2021

Einführung Krebserkrankungen sind lebensbedrohliche Erkrankungen, häufig mit kurativen Therapieansätzen, hohem Rezidivrisiko und belastenden Symptomen, die einer unmittelbaren, qualitätsgesicherten Versorgung bei gleichzeitiger Patientenzufriedenheit und hoher Mitarbeitermotivation über die gesamte Versorgungskette hinweg einschließlich Rehabilitation, auch in Zeiten einer Pandemie, bedürfen.

Methoden Bevor Empfehlungen und Vorschriften übergeordneter Behörden erlassen wurden, begannen wir bereits im Februar 2020 einen Pandemieplan zur Aufrechterhaltung der onkologischen Rehabilitation zu entwickeln. Unter Einbeziehung der Mitarbeiter wurden Schutzpläne für Rehabilitanden und Mitarbeiter entwickelt mit dem Ziel einer Covid-19-freien Rehabilitation. Ablaufpläne wurden auf Grundlage der Epidemiologischen Bulletins des RKI (Robert Koch Institut, Deutschland) von 2017 (Influenza-Infektion) und 2020 (Covid-19) erarbeitet und eingesetzt. Die Effekte dieser Maßnahmen wurden mittels einer Patienten- und Mitarbeiterbefragung evaluiert.

Ergebnisse Die Herausforderungen des pandemischen Geschehens wurden erfolgreich umgesetzt. Sowohl die Patienten-, als auch die Mitarbeiterbefragung zeigten eine hohe Akzeptanz der Maßnahmen bei gleichzeitig hoher Zufriedenheit, trotz der Mehrbelastungen bzw. Einschränkungen. So gaben 98,5% der Patienten an, dass die Fortsetzung der Rehabilitation wichtig für ihre Gesundheit sei. Gleichzeitig fühlten sich 87% sicher in den Kliniken aufgehoben. 88% aller Mitarbeiter (MA) und 93% der MA der Risikogruppe gaben an, dass die Schutzmaßnahmen zum richtigen Zeitpunkt eingeführt wurden. Gleichzeitig waren 76% aller und 84% der Mitarbeiter der Risikogruppe mit der Mehrbelastung einverstanden. Trotz des hohen Risikopotentials in den Kliniken (immungeschwächte Patienten, Patienten aus verschiedenen z.T. sehr unterschiedlich belasteten Landkreisen) konnte bis dato ein SARS-CoV-2 Ausbruch in den Kliniken vermieden werden.

Zusammenfassung Das rechtzeitige Ausrollen adaptierter Pandemieregeln in Rehabilitationskliniken, ermöglicht auch in Pandemiezeiten die Fortführung einer qualitativ hochwertigen onkologischen Rehabilitation und trägt damit zu einer Stabilisierung der Versorgungskette bei Krebserkrankungen bei. Gleichzeitig konnte eine hohe Akzeptanz der Maßnahmen bei Patienten und Mitarbeitern der Kliniken evaluiert werden.
U.S. COVID-19 State Government Public Dashboards: An Expert Review
Authors: Fareed Naleef , Swoboda Christine M. , Chen Sarah , Potter Evelyn , Wu Danny T. Y. , Sieck Cynthia J.
Published: April 2021

Background In the United States, all 50 state governments deployed publicly viewable dashboards regarding the novel coronavirus disease 2019 (COVID-19) to track and respond to the pandemic. States dashboards, however, reflect idiosyncratic design practices based on their content, function, and visual design and platform. There has been little guidance for what state dashboards should look like or contain, leading to significant variation.

Objectives The primary objective of our study was to catalog how information, system function, and user interface were deployed across the COVID-19 state dashboards. Our secondary objective was to group and characterize the dashboards based on the information we collected using clustering analysis.

Methods For preliminary data collection, we developed a framework to first analyze two dashboards as a group and reach agreement on coding. We subsequently doubled coded the remaining 48 dashboards using the framework and reviewed the coding to reach total consensus.

Results All state dashboards included maps and graphs, most frequently line charts, bar charts, and histograms. The most represented metrics were total deaths, total cases, new cases, laboratory tests, and hospitalization. Decisions on how metrics were aggregated and stratified greatly varied across dashboards. Overall, the dashboards were very interactive with 96% having at least some functionality including tooltips, zooming, or exporting capabilities. For visual design and platform, we noted that the software was dominated by a few major organizations. Our cluster analysis yielded a six-cluster solution, and each cluster provided additional insights about how groups of states engaged in specific practices in dashboard design.

Conclusion Our study indicates that states engaged in dashboard practices that generally aligned with many of the goals set forth by the Centers for Disease Control and Prevention, Essential Public Health Services. We highlight areas where states fall short of these expectations and provide specific design recommendations to address these gaps.
Endovascular Considerations in Traumatic Injury of the Carotid and Vertebral Arteries
Authors: Vellimana Ananth K. , Lavie Jayson , Chatterjee Arindam Rano
Published: April 2021

Cervical carotid and vertebral artery traumatic injuries can have a devastating natural history. This article reviews the epidemiology, mechanisms of injury, clinical presentation, and classification systems pertinent to consideration of endovascular treatment. The growing role of modern endovascular techniques for the treatment of these diseases is presented to equip endovascular surgeons with a framework for critically assessing patients presenting with traumatic cervical cerebrovascular injury.
Craniofacial Trauma and Vascular Injury
Authors: Bernath Megan M. , Mathew Sunu , Kovoor Jerry
Published: April 2021

Cerebrovascular injury is a potentially devastating outcome following craniofacial trauma. Interventional radiologists play an important role in detecting, grading, and treating the different types of vascular injury. Computed tomography angiography plays a significant role in the detection of these injuries. Carotid-cavernous fistulas, extra-axial hematomas, pseudoaneurysms, and arterial lacerations are rare vessel injuries resulting from craniofacial trauma. If left untreated, these injuries can lead to vessel rupture and hemorrhage into surrounding areas. Acute management of these vessel injuries includes early identification with angiography and treatment with endovascular embolization. Endovascular therapy resolves vessel abnormalities and reduces the risk of vessel rupture and associated complications.
The Current Role of Interventional Radiology in the Management of Acute Trauma Patient
Authors: Luckhurst Casey M. , Mendoza April E.
Published: April 2021

Trauma is one of the most common causes of death, particularly in younger individuals. The development of specialized trauma centers, trauma-specific intensive care units, and trauma-focused medical subspecialties has led to the formation of comprehensive multidisciplinary teams and an ever-growing body of research and innovation. The field of interventional radiology provides a unique set of minimally invasive, endovascular techniques that has largely changed the way that many trauma patients are managed. This article discusses the role of interventional radiology in the care of this complex patient population, and in particular how the specialty fits into the overall team management of these patients.
Where Does Interventional Radiology Fit in with Trauma Management Algorithm?
Authors: Pillai A. S. , Srinivas S. , Kumar G. , Pillai A. K.
Published: April 2021

Trauma is a major cause of death in the United States, particularly in the younger population. Many traumatic deaths, as well as major morbidity, occur secondary to uncontrolled hemorrhage and eventual exsanguination. Interventional radiology plays a major role in treating these patients, and interventional techniques have evolved to the point where they are an integral part of treatment in these critically ill patients. This article reviews the role of interventional radiology in the treatment algorithms for traumatic injury sponsored by major societies and associations.
Thoracic Trauma, Nonaortic Injuries
Authors: Jones Kai A. , Sadri Shirin , Ahmad Noor , Weintraub Joseph R. , Reis Stephen P.
Published: April 2021

Trauma is one of the leading causes of death worldwide. Approximately two-thirds of trauma patients have thoracic injuries. Nonvascular injury to the chest is most common; however, while vascular injuries to the chest make up a small minority of injuries in thoracic trauma, these injuries are most likely to require intervention by interventional radiology (IR). IR plays a vital role, with much to offer, in the evaluation and management of patients with both vascular and nonvascular thoracic trauma; in many cases, IR treatments obviate the need for these patients to go to the operating room. This article reviews the role of IR in the treatment of vascular an nonvascular traumatic thoracic injuries.
Optomechanical sensor can suppress quantum noise and simultaneously amplify the input signal
Authors: McConnon Aili
Published: April 2021

Hybrid optomechanical system with an ensemble of ultracold atoms functions as an ultraprecesion quantum amplifer sensor
Topologically induced metastability in a periodic XY chain
Authors: Cosco Clément , Shapira Assaf
Published: April 2021

Non-trivial topological behavior appears in many different contexts in statistical physics, perhaps the most known one being the Kosterlitz–Thouless phase transition in the two-dimensional XY model. We study the behavior of a simpler, one dimensional, XY chain with periodic boundary and strong interactions, but rather than concentrating on the equilibrium measure, we try to understand its dynamics. The equivalent of the Kosterlitz–Thouless transition in this one-dimensional case happens when the interaction strength scales like the size of system N, yet we show that a sharp transition for the dynamics occurs at the scale of log N. When the interactions are weaker than a certain threshold, topological phases could not be observed over long times, while for interactions that are stronger than that threshold, topological phases become metastable, surviving for diverging time scales.
Transition probabilities for flavor eigenstates of non-Hermitian Hamiltonians in the PT-broken phase
Authors: Ohlsson Tommy , Zhou Shun
Published: April 2021

We investigate the transition probabilities for the “flavor” eigenstates in the two-level quantum system, which is described by a non-Hermitian Hamiltonian with the parity and time-reversal (PT) symmetry. Particularly, we concentrate on the so-called PT-broken phase, where two eigenvalues of the non-Hermitian Hamiltonian turn out to be a complex-conjugate pair. In this case, we find that the transition probabilities will be unbounded in the limit of infinite time t → +∞. However, after performing a connection between a non-Hermitian system, which exhibits passive PT symmetry and global decay, and the neutral-meson system in particle physics, we observe that the diverging behavior of the transition probabilities is actually applicable to the gauge-transformed neutral-meson states, whereas the transition probabilities for physical states are exponentially suppressed by the global decay. We also present a brief review on the situation at the so-called exceptional point, where both the eigenvalues and eigenvectors of the Hamiltonian coalesce.
Earthquakes and entropy: Characterization of occurrence of earthquakes in southern Spain and Alboran Sea
Authors: Posadas A. , Morales J. , Posadas-Garzon A.
Published: April 2021

We propose the use of entropy, H, as an indicator of the equilibrium state of a seismically active region (seismic system). The relationship between an increase in H and the occurrence of a great earthquake in a study area can be predicted by acknowledging the irreversible transition of a system. From this point of view, the seismic system evolves from an unstable initial state (due to external stresses) to another, where the stresses have dropped after the earthquake occurred. It is an irreversible transition that entails an increase in entropy. Five seismic episodes were analyzed in the south of the Iberian Peninsula, the Alboran Sea (Mediterranean Sea), and the North of Morocco: two of them of moderate-high magnitude (Al Hoceima, 2004 and 2016) and three of them of moderate-low magnitude (Adra, 1993–1994; Moron, 2007; and Torreperogil, 2012–2013). The results are remarkably in line with the theoretical forecasts; in other words: an earthquake, understood as an irreversible transition, must suppose an increase in entropy.