bluuebunny/crossref_metadata_2025 huggingface dataset:
Efficient Identification of Node Importance Based on Agglomeration in Cycle-Related Networks
Authors: Kunt Aysun Asena , Berberler Zeynep Nihan
Published: November 2020

The identification of node importance in complex networks is of theoretical and practical significance for improving network robustness and invulnerability. In this paper, the importance of each node is evaluated and important nodes are identified in cycles and related networks by node contraction method based on network agglomeration. This novel method considers both the degree and the position of the node for the identifying the importance of the node. The effectiveness and the feasibility of this method was also validated through experiments on different types of complex networks.
THE EFFECTS OF KNOWLEDGE SPILLOVERS AND ALLIANCE PORTFOLIO DIVERSITY ON PRODUCT INNOVATION AND FIRM GROWTH
Authors: DE PARIS CALDAS LUIZ FERNANDO , DE OLIVEIRA PAULA FABIO , DA SILVA JORGE FERREIRA
Published: November 2020

This study examines the extent to which the intra-industry knowledge spillover and a firm’s alliance portfolio diversity have an effect on product innovation performance and the growth of different size of firms. A model was proposed and empirically tested using structural equation modelling with Bayesian estimation. The data was extracted from the Colombian innovation survey EDIT from 2011 to 2016 and comprised a sample of 913 manufacturing firms. The results demonstrated that less-developed and resource-scarce settings, such as Colombia, foster interfirm collaboration regardless of their size. Nevertheless, even when considered the positive and significant effect of collaboration, spillovers are the most relevant external knowledge source in explaining the product innovation performance and growth of small and medium firms. The findings also showed that knowledge spillovers can be detrimental to the large firms’ outcomes, possibly associated with a weaker appropriability regime and the loss of knowledge derived from outgoing spillovers.
THE IMPACT OF MANAGERIAL PSYCHOPATHY ON ORGANISATIONAL INNOVATION
Authors: BODDY CLIVE ROLAND , TAPLIN ROSS
Published: November 2020

Counter intuitively, this research finds that innovation is not negatively correlated with the presence of psychopathic managers but rather is significantly and positively correlated. This effect, from a survey of 261 full-time, white collar Australian employees, is strongest for product innovation and then administrative innovation, with the positive effect for process administration not statistically significant. Psychopathic managers have previously been linked to many detrimental characteristics within organisations and while this study finds employees working under psychopathic managers have lower autonomy in completing their work, their creativity is not decreased. Thus, the usual mechanism of higher creativity producing higher innovation is not the path linking psychopathic managers to innovation. It may be that the extreme environment, stress and high pressure created by psychopathic managers pushes employees towards innovativeness. This potentially positive effect of psychopathic managers is contrasted with their commonly reported negative aspects and suggests new avenues to explore for research aiming to increase innovation in the workplace.
SHORT-, MID-, AND LONG-TERM EFFECTS OF INNOVATION ACTIVITIES: A CONFIGURATIONAL ANALYSIS ON CONTINUITY, COMPETENCE, AND COOPERATION
Authors: KÖTTING MICHAEL , KUCKERTZ ANDREAS
Published: November 2020

The constant generation of innovation is a major factor in explaining a firm’s long-term success. Accordingly, previous literatures have identified several organisational, processual, and cultural factors that enable firms to promote successful innovation. Although these success factors appear to be rather different, most of them revolve around continuity, competence, or cooperation. As little prior research has focused on the complexity and interdependence of these various interlinked theoretical concepts, we adopt a configurational and longitudinal approach to analyse the effect of continuity, competence, and cooperation on the innovation performance of a firm on short-, mid-, and long-term bases. Based on a longitudinal data set that captures the innovation behaviour of 220 firms from 2009 to 2015, we find that continuity is the basic requirement for constant innovation performance. In addition, cooperation is likely to be supportive of innovation performance in the short term, while competence supports innovation performance in the long term.
A Khintchine-type theorem for affine subspaces
Authors: Alvey Daniel C.
Published: November 2020

We show that affine subspaces of Euclidean space are of Khintchine type for divergence under certain multiplicative Diophantine conditions on the parameterizing matrix. This provides evidence towards the conjecture that all affine subspaces of Euclidean space are of Khintchine type for divergence, or that Khintchine’s theorem still holds when restricted to the subspace. This result is proved as a special case of a more general Hausdorff measure result from which the Hausdorff dimension of [Formula: see text] intersected with an appropriate subspace is also obtained.
The 2019 Presidential Election and the BRI’s Prospects in Indonesia
Authors: Yuliantoro Nur Rachmat
Published: November 2020

Indonesia’s 2019 presidential election was the latest testament to the popularity of Joko Widodo and his economy-focused domestic agenda. With a stronger popular mandate and a team of rivals standing united behind him, President Jokowi is now in a better position than five years ago to push his reform and revival plans focusing on infrastructure upgrading, human capital development, poverty reduction, and deregulation. Jokowi’s re-election also augurs well for China-Indonesia relations in general and bilateral BRI cooperation in particular, as he will continue to welcome more foreign investment in mega-projects to bring about an infrastructural facelift for Indonesia. A pragmatic Jokowi will not allow long-running thorny issues like territorial disputes, anti-Chinese discrimination and xenophobia to stand in the way of addressing more immediate domestic priorities, such as maintaining high growth rates, pushing for pro-business regulatory reforms, and promoting higher levels of industrialization. The three years from 2020 to 2022 will be the most crucial period for vigorously advancing BRI cooperation between Beijing and Jakarta because in the lead-up to the 2024 general election, President Jokowi will increasingly find himself a “lame duck” president as factions in his governing coalition begin to splinter to jostle for advantageous positions. He will also be more likely to face growing resistance, backlash, and scrutiny with regard to some of his China-related policies.
Decision Optimization and Interest Coordination of Dual-Channel Supply Chain Embedded by Two-Echelon Logistics Service Providers under the Dominance of Retailer
Authors: Zhang Jianjun , Xing Daning
Published: November 2020

Taking the dual-channel supply chain embedded by two-echelon logistics service providers as the research object, this paper studies the optimal decisions of each decision maker under the centralized and decentralized decision-making mode led by the retailer. Based on the decentralized decision-making mode, an improved coordination mechanism of residual profit sharing is designed to realize the interest coordination, in which the bargaining power of all participants is fully considered. The results show that, under the decentralized decision-making mode, the profit of FLSP increases first and then decreases as the sensitivity coefficient of cross-service level increases, while the profits of other decision makers and the supply chain system decrease with the increase of sensitivity coefficient of cross-service level. The relative size of the price sensitivity coefficient of online and offline channel has an inconsistent impact on the profit of FLSP, while it has a consistent impact on the profits of other decision makers. The profit of FLSP fluctuates greatly with changes in the sensitivity coefficient, and it is difficult to be guaranteed in the entire supply chain system. On this basis, an improved coordination mechanism of residual profit sharing is designed. The results show that, after the introduction of bargaining power coefficient of the Nash negotiation model, the variation coefficient of the profits of all decision makers is smaller after coordination, and the profit growth rates are more uniform.
Maternal and Perinatal Outcomes of Singleton Term Breech Vaginal Delivery at a Tertiary Care Center in Nepal: A Retrospective Analysis
Authors: Basnet Tulasa , Thapa Baburam Dixit , Das Dipti , Shrestha Ramesh , Sitaula Sarita , Thapa Anu
Published: November 2020

Background. Breech presentation is associated with increased rates of maternal and perinatal morbidity regardless of mode of delivery. After the results of Term Breech Trial, most of the countries adopted the protocol of cesarean section for term breech delivery because of which breech vaginal delivery is becoming rare. The aim of this study is to evaluate short-term maternal and perinatal outcomes of breech vaginal delivery at a tertiary care hospital in Nepal. Methods. A retrospective review of case records of all women who had vaginal breech delivery from April 13, 2016, to April 12, 2018, was conducted, over a period of two years. Available demographic variables, obstetric characteristics, details of labor, postpartum complications, and perinatal complications were recorded and analyzed. Results. Out of 21,768 cases of deliveries during the study period, the incidence of term breech deliveries was 528 (2.4%) among which the mode of only 84 (17.8%) deliveries was vaginal. Most of the deliveries were unplanned and were conducted because emergency cesarean section could not be performed. Three (3.6%) women had postpartum hemorrhage, and four (4.8%) had entrapment of aftercoming head, two of them requiring Dührssen incisions. Adverse perinatal outcomes were seen in 23.8% of such deliveries with <7 APGAR score at 5 minutes in 20.2%, neonatal admission in 17.7%, and perinatal mortality in 8.3%. The perinatal mortality was significantly associated with birthweight less than 2500 grams as compared to birthweight ≥2500 grams (21.1% versus 4.6%;

P
=
0.043

). Conclusion. The perinatal outcomes for vaginal breech delivery are grave with our existing health facilities, especially when the deliveries are not well planned.
Fatigue Characteristics and Numerical Modelling Prosthetic for Chopart Amputation
Authors: Abbas Saif M. , Kubba Ammar I.
Published: November 2020

This research is looking for three laminated composite material groups. These three groups were utilized in experimental investigation to find their mechanical properties. These properties have been used to design and manufacture a socket for a partial foot prosthesis using an ANSYS model. This socket was manufactured with a vacuum pressure device to improve its properties. The socket composite material was tested for tensile and fatigue properties; then, its results were used in the ANSYS model. The composite material matrix was laminated in an 80 : 20 ratio, and there were three types of reinforcement lamination material (Perlon, glass fiber, and carbon fiber). The mechanical property results of these tests were found as follows: using only-Perlon reinforcement, the properties are

σ

y

=
33.6
 
MPa

,

σ

ult

=
35.6
 
MPa

, and

modulus
 
of
 
elasticity
=
1.03
 
GPa

; using (3Perlon +2carbon fiber +3perlon) layers, the properties were

σ

y

=
65.5
 
MPa

,

σ

ult

=
92.5
 
MPa

, and

modulus
 
of
 
elasticity
=
1.99
 
GPa

; and using (3Perlon + 2 glass fiber + 3perlon) layers, the results were

σ

y

=
40
 
MPa

,

σ

ult

=
46.6
 
MPa

, and

modulus
 
of
 
elasticity
=
1.4
 
GPa

. The ANSYS model used the boundary condition from the measured contact pressure between the socket and the patient’s stump. The MatScan (F-socket) pressure sensor utilized these interface pressure measurements. The maximum values for the pressure were found as follows: 190 kPa and 164 kPa, which are recorded in the posterior and lateral locations, respectively. The calculated factor of safety for the prosthesis that has been made from a selected composite material with the following layers (3 Perlon+2 carbon fiber+3 Perlon) is 1.037 which is safe for design prosthetic applications. From this study, more prosthetic designs can be modelled and manufactured using this approach. Prosthetics and orthotics are usually custom-made for each patient according to its specific requirements. So, it will be very helpful to find a procedure to analyze the prosthetics before manufacturing it.
Comparison of a Novel Herbal Medicine and Omeprazole in the Treatment of Functional Dyspepsia: A Randomized Double-Blinded Clinical Trial
Authors: Bordbar Ghasem , Miri Mohammad Bagher , Omidi Mahmoud , Shoja Saeed , Akhavan Malihe
Published: November 2020

Background. The Trachyspermum ammi L. (TA), Anethum graveolens L. (AG), and Zataria multiflora Boiss (ZM) herbal oils are among the most used herbal products in traditional medicine as the antiseptic, anesthetic, carminative, and antispasmodic. However, there are no clinical studies to evaluate the efficacy of the herbs mentioned in the treatment of functional dyspepsia (FD). This study was designed to appraise the efficacy and safety of a novel herbal medicine consisting of ZM, AG, and TA essential oils compared to omeprazole in FD treatment. Methods. The present study was a randomized double-blind clinical trial with parallel groups in Iran. Patients in control and intervention arms received omeprazole 20 mg once a day and 250 mg soft-gel capsules containing 180 mg of essential oils of ZM, AG, and TA twice a day for two weeks, respectively. The primary outcome was the sufficient response rate in the postprandial distress syndrome (PDS) and/or epigastric pain syndrome (EPS) at the end of the intervention. Secondary outcomes were the improvement rate in the PDS, EPS, Gastrointestinal Symptom Rating Scale (GSRS), and quality of life scores. Also, safety and tolerability were assessed. Results. The within-group comparison of EPS, PDS, total GSRS, GSRS Pain, and GSRS Dyspepsia scores with that at the end of the treatment indicated a significant reduction in both control and intervention groups (

p
<
0.001

). However, after two weeks of treatment, the herbal medication and omeprazole arms were significantly different in the sufficient response rate based on PDS (

p
<
0.01

) and EPS (

p
<
0.05

) scores (78.3% (18/23) and 73.7% (14/19) in the intervention group vs. 36.4% (8/22) and 40.9% (9/22) in the control group). Also, the mean reduction in EPS (

p
<
0.05

), PDS (

p
<
0.01

), and GSRS (

p
<
0.001

) scores after treatment was significantly higher in the intervention group than control group. Conclusion. Based on the study findings, this herbal medicine can be considered as an appropriate treatment of FD. However, a larger multicenter trial is needed to confirm the results of the trial.
Isolation and Identification of Major Pathogenic Bacteria from Clinical Mastitic Cows in Asella Town, Ethiopia
Authors: Kasa Gezehagn , Tegegne Betelihem , Tadesse Belege
Published: November 2020

Mastitis is a multietiological and complex disease causing inflammation of the parenchyma of mammary glands and is a problem in many dairy cows. The objective of this study was to isolate and identify the pathogenic bacteria that cause bovine clinical mastitis. A cross-sectional study was undertaken between November 2018 to April 2019 on a small scale and government dairy farms in Asella town. Cow’s udder and teats were physically examined to detect clinical mastitis. A total of 83 milk samples were collected from 46 cows that show clinical sign of mastitis from a total of 12 farms. Isolation and identification of major bacterial species were carried out by culturing different media and using primary and secondary biochemical tests. Out of the 83 samples collected and examined, all (100%) were positive for the cultural isolation of bacterial species. The bacteria were identified to genus and species level. Among the 83 isolates, 32 (38.6%), 24 (28.9%), and 6 (7.2%) were Staphylococcus aureus, Staphylococcus intermedius, and Staphylococcus hyicus, respectively. Other bacteria like Escherichia coli 12 (14.5%) and Streptococcus species 2 (2.4%) were also isolated. Bacillus species 2 (2.4%), Proteus species 2 (2.4%), and 3 (3.6%) of them were mixed bacterial infections. The present study revealed that both contagious and environmental bacterial pathogens were responsible for the occurrence of clinical mastitis. Proper milking practices and farm husbandry practices and future detailed studies up to the species level and on antibiotic profiles of the pathogens are needed.
Modeling of Linear Displacement and Design of Adaptive Robust Controller
Authors: Jiang Lei
Published: November 2020

Twisted-string actuation method has attracted much more attention due to its compact size and considerable output force. Many studies have been proposed to estimate its linear displacement of actuation based on the angular measurement of the rotary device. However, the estimated results are not always accurate, which requires an additional process to make the estimation accuracy. In this paper, an ARC control scheme with force feedback has been developed for a high-accuracy twisted-string actuation system.
An Interval Efficiency Measurement in DEA When considering Undesirable Outputs
Authors: Mo Renbian , Huang Hongyun , Yang Liyang
Published: November 2020

Data envelopment analysis (DEA) is a popular mathematical tool for analyzing the relative efficiency of homogenous decision-making units (DMUs). However, the existing DEA models cannot tackle the newly confronted applications with imprecise and negative data as well as undesirable outputs simultaneously. Thus, we introduce undesirable outputs into modified slack-based measure (MSBM) model and propose an interval-modified slack-based measure (IMSBM) model, which extends the application of interval DEA (IDEA) in fields that concern with less undesirable outputs. The novelties of the model are that it considers the undesirable outputs while dealing with imprecise and negative data, and it is slack-based. Furthermore, the model with undesirable outputs is proven translation-invariant and unit-invariant. Moreover, a numerical example is provided to illustrate the changes of the lower and upper bounds of the efficiency score after considering the undesirable outputs. The empirical results show that, without considering undesirable outputs, most of the lower bounds of the efficiency scores will be overestimated when the DMUs are weakly efficient and inefficient. The upper bound will also change after considering undesirable outputs when the DMU is inefficient. Finally, an improved degree of preference approach is introduced to rank the DMUs.
Seasonal Variation in Patch Test Results with European Baseline Series
Authors: Brahem Aïcha , Aroui Haifa , Gaddour Asma , Chouchene Asma , Aloui Asma , Kacem Imen , Maoua Maher , Kalboussi Houda , ElMaalel Olfa , Chatti Souhail , Dabbabi Faten , Mrizek Nejib
Published: November 2020

Aim. To study the influence of season on patch tests results. Methods. We conducted a retrospective epidemiological study which concerned all the patients of the Tunisian center, who consulted in the Dermato-Allergology Unit of Occupational Medicine Department of Farhat Hached University Hospital-Sousse (Tunisia) over a period of 07 years. All the patients were tested by the European Standard Battery allergens (BSE). Results. The data of 1000 patch tests were analyzed during the study period. More than half of the patch tests (58.6%) was positive. In winter, 63% of patch tests showed a positive reaction versus 52% of patch tests in summer without a statistically significant association. However, results of lanolin alcohols, epoxy resin, and Sesquiterpene lactone mix varied significantly with season. Atopy was significantly associated with 18.8% of positive reactions in winter and only with 5.2% of positive reactions in summer (

p
=
0.015

). Conclusion. Seasonal variations in patch tests results were more significant with some allergens of European Standard Battery and in atopic patients.
Hydrogeochemistry of Surface and Ground Water in Alatening Village, Northwest Region, Cameroon
Authors: Njoyim Kahnji Iren , Kengni Lucas , Tita Margaret Awah , Njoyim Buleng Tamungang Estella , Fonzenyuy Vitalis Fonfo , Aziwo Bertrand Tatoh
Published: November 2020

The purpose of this study was to evaluate petrography and the quality of water for drinking purposes in Alatening, Northwest Cameroon, with respect to the World Health Organization (WHO) standards. The indigenes of the study area, as well as other dwellers in rural areas, consume water from these sources whose quality is unknown; thus, it can lead to contamination and waterborne diseases. Three springs and two streams of Alatening village were investigated in early December 2017 and late July 2018 for organoleptic, physicochemical, and bacteriological parameters using standard methods. The petrographic studies revealed trachyte and benmoreite, and weathering of minerals from these rocks into the soil leads to the water-rock interaction, thus water hydrogeochemistry. All the water samples were clean except that of Alabong which had slight odour due to leaf fall. pH showed acidic water with the springs of Ngog and Alabong falling below the WHO limit in the dry season. Electrical conductivity and total dissolved solids (TDS) were low implying low mineralised water which can also lead to shortage of important minerals in humans. All the essential ions were found within the WHO guideline values without any significant change in concentrations between seasons (

p
>
0.05

). The water facies were such as Mg-Ca, Cl-Ca, and HCO3-CO3, suggesting an influence of rock silicate weathering and anthropogenic influence. Aluminium and iron contents were above the WHO limit in both seasons due to their abundance in the soils which could be a risk factor for the local population. Faecal coliforms as well as specific bacteria such as Enterobacter, Escherichia coli, Streptococcus, Salmonella, and Shigella were found in all the water samples, attributable to poor hygiene. Health data in the locality indicated the prevalence of typhoid, dysentery, and amoebiasis with a total of 2702 cases recorded between 2016 and 2017, therefore requiring treatment before consumption.
Guaranteed Cost Formation Tracking Control for Swarm Systems with Intermittent Communications
Authors: Zhang Purui , Chen Xiaoqian , Yang Xiaogang
Published: November 2020

The current paper studies guaranteed cost time-varying formation tracking design and analysis problems of high-order swarm systems subject to intermittent communications. Different from the existing work of the time-varying formation control, the time-varying formation tracking can be achieved while certain performance can be guaranteed, and the impacts of the intermittent communications and switching topologies are considered. First, a new intermittent time-varying formation tracking control protocol with a global performance index is proposed, where not only the formation regulation performances but also the control energy expenditures are involved. The codesign of the gain matrix with the performance index is achieved to compromise the formation regulation performances against control energy expenditures, and the guaranteed cost is determined to restrain the upper bound of the performance index. Then, guaranteed cost time-varying formation tracking design and analysis criteria are given, where the matrix variable of the linear matrix inequality conditions is used to design the gain matrix and to determine the guaranteed cost. Finally, a simulation example is provided to illustrate the effectiveness of the theoretical results.
A Social Force Model for Pedestrians’ Movements Affected by Smoke Spreading
Authors: Makmul J.
Published: November 2020

A social force (SF) model is proposed to simulate the egress of pedestrians while smoke is spreading. The advection-diffusion with source term is used to describe the propagation of smoke. It is incorporated into the SF model. The navigation field in our model is determined by the negative gradient of the solution of the Eikonal equation. It depends on the pedestrian and smoke density. Numerical experiments are performed in a room with multiple exits, and their results are shown.
Identification of Prognostic Biomarkers of Cutaneous Melanoma Based on Analysis of Tumor Mutation Burden
Authors: Lin Jiaqiong , Lin Yan , Huang Zena , Li Xiaoyong
Published: November 2020

Background. Immunotherapy offers a novel approach for the treatment of cutaneous melanoma, but the clinical efficiency varies for individual patients. In consideration of the high cost and adverse effects of immunotherapy, it is essential to explore the predictive biomarkers of outcomes. Recently, the tumor mutation burden (TMB) has been proposed as a predictive prognosticator of the immune response. Method. RNA-seq and somatic mutation datasets of 472 cutaneous melanoma patients were downloaded from The Cancer Genome Atlas (TCGA) database to analyze mutation type and TMB. Differently expressed genes (DEGs) were identified for functional analysis. TMB-related signatures were identified via LASSO and multivariate Cox regression analysis. The association between mutants of signatures and immune cells was evaluated from the TIMER database. Furthermore, the Wilcox test was applied to assess the difference in immune infiltration calculated by the CIBERSORT algorithm in risk groupings. Results. C>T substitutions and TTN were the most common SNV and mutated gene, respectively. Patients with low TMB presented poor prognosis. DEGs were mainly implicated in skin development, cell cycle, DNA replication, and immune-associated crosstalk pathways. Furthermore, a prognostic model consisting of eight TMB-related genes was developed, which was found to be an independent risk factor for treatment outcome. The mutational status of eight TMB-related genes was associated with a low level of immune infiltration. In addition, the immune infiltrates of CD4+ and CD8+ T cells, NK cells, and M1 macrophages were higher in the low-risk group, while those of M0 and M2 macrophages were higher in the high-risk group. Conclusion. Our study demonstrated that a higher TMB was associated with favorable survival outcome in cutaneous melanoma. Moreover, a close association between prognostic model and immune infiltration was identified, providing a new potential target for immunotherapy.
A Scalable Mechanism Based on Blockchain for Information Processing in Energy Trading
Authors: Jiang Xunyan , Wu Lei
Published: November 2020

Energy Internet (EI) can provide a fair, transparent, and safe environment for the energy market through the rational use of the Internet and blockchain technology. However, the existing EI has complicated management in energy, capital, and information flow. Furthermore, blockchain technology (BT) is a new technique with a scalability problem. To overcome the problem, we proposed a scalable mechanism based on blockchain for information processing in energy trading. The proposed mechanism adopts three-way communication (TWC) between energy utilities and consumers to effectively manage the energy, capital, and information flow. In the running of TWC, three modules of BT-based Internet of Things (IoT) system, BT-based virtual currency system, and BT-based EI information platform are constructed. In addition, we proposed that these modules are managed by carrying out weak centralized management to make the EI system scalable. In the operation of this mechanism, the functions of the three modules are independent and parallel. The proposed mechanism can realize the efficient transmission of energy and information and help to solve the supervision problem of energy trading. Compared with the existing information process mechanism, it is superior in promoting the dynamic balance of resources in a wide range and meeting the fast, efficient, and safe energy trade needs between the supply and demand sides.
Classification and Application of Roof Stability of Bolt Supporting Coal Roadway Based on BP Neural Network
Authors: Ren Heng , Zhu Yongjian , Wang Ping , Li Peng , Zhang Yuqun , Wang Xizhi , Li Yingying
Published: November 2020

In view of the frequent occurrence of roof accidents in coal roadways supported by bolts, the widespread application of bolt support technology in coal roadways has been restricted. Through on‐site investigation, numerical analysis, and other research methods, 6 evaluation indicators were determined, and according to the relevant evaluation factors and four types of coal roadway roof stability, a neural network structure for roof stability prediction was constructed to realize the quantitative prediction of the roof stability of bolt‐supported coal roadway. The method of adding momentum is used to improve the BP neural network algorithm. After passing the simulation test, it is applied to the field experiment of the roof stability classification. In order to facilitate on‐site application, on the basis of the established BP neural network prediction model, a coal mine roof stability classification software recognition system was developed. Using the developed software system, the stability of coal roadway roof is classified into mine, coal seam, and region. According to the recognition result, the surfer software is used to draw the contour map of the stability of the roof of each coal mining roadway. The classification results are consistent with the actual situation on site.
Seismic Response Mitigation of a Long‐Span Tower Bridge with Two Types of Constraint System
Authors: Xu Li , Gao Qingfei , Zheng Junhao , Ding Chuanhui , Liu Kang
Published: November 2020

The stress of the main tower of a cable‐stayed bridge depends on the connection type between the tower and deck. In order to study the most suitable longitudinal damping mode for a long‐span cable‐stayed bridge. In this article, a nonlinear finite element model is established based on a large span concrete cable‐stayed bridge with a main span of 680 m. Without considering the influence of the transverse constraint, the damping effect of the elastic connection device and the viscous damper is simulated when the longitudinal seismic load is input. The results show that the stiffness of the main beam is increased by installing the elastic connection device, so the longitudinal drift frequency of the main beam is increased, but the stiffness of the structure is not changed by installing the viscous damper. Both viscous dampers and elastic connection structures can reduce the longitudinal displacement of the beam end, but viscous dampers are more favorable for the stress of the main tower. In terms of damping effect, viscous dampers are more suitable for long‐span cable‐stayed bridges, but, in terms of economy and parameter control, elastic connection devices have more advantages.
Reversible Information Hiding Algorithm Based on Multikey Encryption
Authors: Li Zhaohui , Wang Yiqing , Wang Zhi , Liu Zheli , Zhang Jian , Li Min
Published: November 2020

This paper proposes a scheme of reversible data hiding in encrypted images based on multikey encryption. There are only two parties that are involved in this framework, including the content owner and the recipient. The content owner encrypts the original image with a key set which is composed by a selection method according to the additional message. Thus, the image can be encrypted and embedded at the same time. Additional message can be extracted given that the recipient side could perform decryption strategy by exploiting spatial correlation; then, original image can be recovered without any loss. Compare with other current information hiding mechanism, the proposed approach provides higher embedding capacity and is also able to perfectly reconstruct the original image as well as the embedded message. Rate distortion of the proposed method outperforms the previously published ones.
Study on the Component‐Based Model of an All‐Welded Beam‐Column Connection for Progressive Collapse Analysis
Authors: Xie Fuzhe , Liu Wenyuan , Gu Bin , Qian Hai
Published: November 2020

The mechanical behavior of all‐welded beam‐column connections of steel frames during progressive collapse was numerically studied using finite element simulations. The validation of the numerical model was based on a previous test model. The analysis results indicated that the stiffness of the all‐welded beam‐column connection in the elastic‐plastic stage was mainly provided by the shear stiffness of the panel zone, and the axial compression on the column had a substantial impact on the capacity and ductility of the all‐welded beam‐column connection. An improved component‐based model of the all‐welded beam‐column connection was proposed. To verify the accuracy of the proposed model, a beam‐column assembly with an all‐welded connection was established and the influence of the catenary action, column axial compression, beam‐column stiffness ratio, and dynamic performance was parametrically analyzed. The validation results showed that the proposed model was able to simulate the behavior of all‐welded beam‐column connections at large structural deformation.
2D Lidar-Based SLAM and Path Planning for Indoor Rescue Using Mobile Robots
Authors: Zhang Xuexi , Lai Jiajun , Xu Dongliang , Li Huaijun , Fu Minyue
Published: November 2020

As the basic system of the rescue robot, the SLAM system largely determines whether the rescue robot can complete the rescue mission. Although the current 2D Lidar-based SLAM algorithm, including its application in indoor rescue environment, has achieved much success, the evaluation of SLAM algorithms combined with path planning for indoor rescue has rarely been studied. This paper studies mapping and path planning for mobile robots in an indoor rescue environment. Combined with path planning algorithm, this paper analyzes the applicability of three SLAM algorithms (GMapping algorithm, Hector-SLAM algorithm, and Cartographer algorithm) in indoor rescue environment. Real-time path planning is studied to test the mapping results. To balance path optimality and obstacle avoidance,

A

∗

algorithm is used for global path planning, and DWA algorithm is adopted for local path planning. Experimental results validate the SLAM and path planning algorithms in simulated, emulated, and competition rescue environments, respectively. Finally, the results of this paper may facilitate researchers quickly and clearly selecting appropriate algorithms to build SLAM systems according to their own demands.
Cause Analysis of Hindering On‐Site Lean Construction for Prefabricated Buildings and Corresponding Organizational Capability Evaluation
Authors: Yuan Zhenmin , Zhang Ziyao , Ni Guodong , Chen Chen , Wang Wenshun , Hong Jingke
Published: November 2020

As prefabricated buildings play a significant role in the global fight against the new coronavirus “COVID‐19,” they attract more global attention than other types of buildings. Lean construction helps to improve the benefits of enterprises and the working environment of workers. However, prefabricated buildings are encountering various challenges in implementing on‐site lean construction. According to a cause‐and‐effect relationship, it will be more meaningful to explore the critical causes hindering on‐site lean construction, namely, the critical barriers. Hence, this paper establishes a research methodology framework based on multimethod collaboration, including the exploratory factor analysis model regarding critical barriers, the exploratory factor evaluation model regarding organizational capabilities, and the important findings and suggestions. Thirty‐one critical barriers of on‐site lean construction for prefabricated buildings are identified via literature analysis, field survey, and semistructured interview. After pre‐exploratory factor analysis, thirty critical barriers are finally retained and prioritized, and six common components are extracted and nominated. A large‐scale project using the Engineering, Procurement, and Construction (EPC) mode is selected as a case study to evaluate its construction organizational capability to deal with the six common components. The important findings indicate that the inadequate professional management capability of managers is the most critical barrier, and the construction organization from the project case is fully capable of dealing with the common components during on‐site lean construction. Six corresponding substantive suggestions are also proposed according to domain experts, and the most prioritized one of them is that an internal training or external recruitment is suggested to solve the inadequate professional management capability of managers. The internal training should take the form of seminars and training courses that invite senior prefabricated project management experts to participate. The external recruitment needs to focus on the management experience, lean skills, and leadership of managers in prefabricated projects. The established methodology framework proposes a new idea for the barrier analysis and corresponding organizational capability evaluation of on‐site lean construction from the perspective of the specific prefabricated construction industry rather than the entire construction industry. Due to the special construction mode of prefabricated buildings, it further expands the current boundary of lean construction methodology. The findings and suggestions will provide a valuable reference and guidance for the prefabricated construction industry to solve the barriers regarding on‐site lean construction.
Optimization of Stakeholder Relation Network of the Qingdao Elderly Livable Community Construction Project
Authors: Dong Mingyuan , Liu Guolei
Published: November 2020

Due to the population ageing, building an elderly livable community has become an urgent task of social welfare development. This Public-Private Partnership construction project faces a variety of pressures from its complex stakeholders. Based on the Qingdao elderly livable community construction project, this paper builds up interpretations about its relationship governance by conducting stakeholder analysis. The paper aims to explore the relationship governance mechanism of multiple connections between related stakeholders. On the basis of complex network theory, this paper establishes a stakeholder relationship network model and describes different modes of different stakeholder relationship in the Qingdao construction project. The paper analyzes the optimal decision-making behavior and interaction of different stakeholders, constructs the objective functions of stakeholder relationship network, applies centrality measure and dominant-set clustering to analyze the optimal conditions of the whole network, and finally carries out simulation calculation. The results show that it is feasible and effective to apply network analysis method to the study of stakeholder relationship in Public-Private Partnership construction projects.
Effects of Urate-Lowering Therapy on Risk of Hyperlipidemia in Gout by a Population-Based Cohort Study and on In Vitro Hepatic Lipogenesis-Related Gene Expression
Authors: Fang Yi-Jen , Wu Tien-Yuan , Lin Cheng-Li , Su Chih-Yang , Li Jia-Rong , Chung Yun-Lung , Tien Ni , Lim Yun-Ping
Published: November 2020

Patients with gout are at a higher risk of cardiovascular disease, which is associated with hyperlipidemia. Management of gout in Taiwan is poor, and the association between urate-lowering therapy (ULT) among gout patients and hyperlipidemia is unclear. We conducted a retrospective cohort study using data from the Longitudinal Health Insurance Database (LHID) of Taiwan on new-onset gout patients and a comparison cohort without gout. A Cox proportional hazards model was used to analyze differences in the risk of hyperlipidemia between patients with and without gout after considering related comorbidities. We also examined the ULT medications on the hepatic expression of lipogenesis-related genes. After adjusting for potential confounders, the case group (44,413 patients) was found to have a higher risk of hyperlipidemia than the control cohort (177,652 patients) [adjusted hazards ratio

aHR

=
2.55

]. Gout patients without antigout treatment had significantly higher risk of hyperlipidemia than the control cohort (

aHR
=
3.10

). Among gout patients receiving ULT, except those receiving probenecid (

aHR
=
0.80

), all had significantly lower risk of hyperlipidemia than gout patients without ULT (all

aHR
<
0.90

). Using real-time polymerase chain reaction, we found that most of the antigout drugs decreased the expression of hepatic genes related to lipogenesis in differentiated HepaRG cells. These data indicate that these antigout drugs reduce hyperlipidemia in gout patients, partly via the reduction in expression of lipogenesis-related genes, leading to improved blood lipid profiles. We provide evidence of the strong association between gout and hyperlipidemia and highlight the need for appropriate treatment guidelines.
Numerical Simulation and Analysis of Diffusion Process for the Leakages of a Tunnel LNG Pipeline
Authors: Kong Chunyan , Zhang Derong , Cai Rong , Li Shuangshuang , Zhu Rongjun
Published: November 2020

Taking a practical project as an example, based on the computational fluid dynamics (CFD), standard k-ε model and finite element method, a mathematical model for the diffusion due to liquefied natural gas (LNG) pipeline leakage in a tunnel was established, and the diffusion process was numerically simulated for three LNG leakage cases. From the simulation results, the variation of CH4 concentration field and explosive gas cloud with time within the tunnel, and the influence of leakage location on the diffusion was analyzed for the three cases. It was shown that the variation of CH4 concentration field had a similar trend for the three cases, but the CH4 explosive gas cloud length increased rapidly with the LNG leakage intensity so that dangerous situations would occur for the medium and large leakages, and a leak location closer to air inlet would lead to a more dangerous situation. When the amount of LNG leakage in the tunnel is large, the effect of mechanical ventilation is obviously weakened. Furthermore, a nitrogen seal precaution was proposed for the situations.
Network Coordination, Self-Regulation Mode, and Autonomous Control Space Planning of Microgrid
Authors: Sun Wenyao , Tian Youwen , Li Jiannan
Published: November 2020

This paper investigates the network coordination, self-regulation mode, and autonomous control spatial planning of microgrid. To do this, the cooperative self-discipline model of multi-microgrid intelligent distribution network is constructed. Based on combing the power control of multi-microgrid with high penetration situation, the concept and characteristics of distribution network and self-regulation mode are defined according to the new requirements, and the basic framework and decision-making process of self-regulation mode are put forward. Further, the formulation method of autonomous spatial planning for multi-micronetworks is described. By constructing cooperative self-discipline space scheme and its reward and punishment mechanism, the network operation behavior is restrained and guided, and the control dimension of the distribution network is reduced. Finally, a typical case is given to illustrate the effectiveness of cooperative self-discipline supervision mode in reducing the space-time dimension of distribution network supervision.
Comparison of the Stability of Two Intraocular Lenses in Primary Angle-Closure Glaucoma after Phacoemulsification
Authors: Zhang Chang , Zhang Meng , Zhang Bing , Wang Shanhong , Wang Yuhong
Published: November 2020

Objective. To observe the stability of intraocular lenses (IOLs) in primary angle-closure glaucoma by ultralong scan depth spectral-domain optical coherence tomography (UL-OCT) after phacoemulsification. Methods. A prospective, randomized study. 73 patients (82 eyes) with primary closed-angle glaucoma and age-related cataract were included in the study. 42 eyes were implanted with ZCB00, while 40 eyes were implanted with Softec HD after phacoemulsification. The tilt, decentration, and space between IOL and posterior capsule (IOL-PC space) were analyzed using UL-OCT at 1 week, 1 month, and 3 months after surgery. The intergroup difference was compared with the paired t-test. Result. The difference of decentration and tilt was not statistically significant (both

P
>
0.05

) both in the horizontal and vertical positions at 1 week, 1 month, and 3 months postoperatively. The horizontal IOL-PC space is 0.111 ± 0.091 mm2, 0.044 ± 0.066 mm2, and 0.055 ± 0.055 mm2 in the Softec HD group and 0.458 ± 0.488 mm2, 0.497 ± 0.363 mm2, and 0.492 ± 0.441 mm2 in the ZCB00 group. The vertical IOL-PC space is 0.102 ± 0.061 mm2, 0.037 ± 0.052 mm2, and 0.053 ± 0.079 mm2 in the Softec HD group and 0.692 ± 0.815 mm2, 0.510 ± 0.415 mm2, and 0.691 ± 0.635 mm2 in the ZCB00 group. The difference was statistically significant (

P
<
0.05

) both in the horizontal and vertical positions except for the first week on the horizon. The Softec HD group is smaller than the ZCB00 group. Conclusion. There is no difference in the stability of the IOL although the IOL-PC space is different. The thickness of IOL may affect the IOL-PC space.
Paciente con amputación transfemoral derecha, clavo gamma y síndrome hemimotor derecho: valoración y manejo del proceso de protetización.
Authors: Cuenca Gonzalez Concepcion , Chiesa Estomba Rossana , Robledo García Miriam , Granja Requena Arsenio , Monleón  llorente Luis , Garvín  Ocampos Lucia
Published: November 2020

Introducción la decisión de protetizar a un paciente amputado depende de: la etiología, nivel de amputación, uni o bilateralidad, comorbilidades, soporte sociofamiliar, capacidad funcional y motivación del paciente. Observación clínica varón, 83 años, diabético, cardiopatía isquémica, accidente cerebrovascular con paresia braquial derecha residual en año 2000. Clavo gamma por fractura pertrocantérea derecha en 2012 y amputación transfemoral derecha en 2018 de causa vascular. Se protetiza mediante encaje de contención isquiática CAT-CAM, sistema de suspensión tipo Kiss, rodilla de bloqueo a la extensión con adaptación del sistema de desbloqueo en porción antero-interna del encaje y pie Sach. Tras tratamiento fisioterápico, consigue deambulación autónoma con ayuda de un bastón y tercera persona por dificultad para agarre de MSD.  Conclusión los médicos rehabilitadores debemos apostar por dotar a nuestros pacientes de autonomía y funcionalidad, siempre que sea viable.
Propiedades balísticas de perdigones antidisturbios “menos letales” y su relación con trauma ocular severo en Chile
Authors: Reynhout Scott
Published: November 2020

Resumen: Se analiza el comportamiento balístico de dos tipos de perdigones “menos letales” usados por las fuerzas policiales en Chile para entender mejor los factores fundamentales que conllevan a la inusual cifra de lesiones oculares en el marco de las manifestaciones masivas ocurridas en Chile desde octubre de 2019. Para evaluar los riesgos de penetración y trauma ocular severo, se construyeron curvas de energía normalizada (E/a) en base a información publicada por las fuerzas policiales y fabricantes de municiones. Aun cuando el riesgo asociado al uso de las municiones según protocolos es leve, este artículo presenta que de todas formas existe riesgo de trauma ocular severo en todas las distancias de uso. La balística de los perdigones, combinada con la imprecisión de municiones multiproyectiles, son factores importantes para explicar la alta incidencia de trauma ocular severo. El caso de Chile es parte de un aumento global en la incidencia de lesiones oculares causadas por municiones consideradas menos letales, lo cual demanda una reevaluación de las políticas que regulan su uso.