LIVIVO - Search results -

Search results

Result 1 - 10 of total 20

Search options

Article ; Online: Perceived occupational stressors among nurses in a level-1 trauma center under normalized COVID-19 epidemic prevention and control in China

Zhe Du / Yajun Zhang / Wei Huang / Tianbing Wang

Heliyon, Vol 9, Iss 10, Pp e21066- (2023)

A qualitative study

2023

Abstract: Background: Nurses in trauma centers encounter emergency patients and are exposed to occupational stressors under normalized pandemic control and prevention. Objective: The objective of this study was to examine the occupational stressors that nurses ... ...

Abstract	Background: Nurses in trauma centers encounter emergency patients and are exposed to occupational stressors under normalized pandemic control and prevention. Objective: The objective of this study was to examine the occupational stressors that nurses perceived during the COVID-19 pandemic in a level-1 trauma center in China. Methods: From December 2020 to May 2021, a qualitative study was conducted, employing conventional content analysis as the research methodology. A total of twelve nurses were purposefully selected from a trauma center at a major hospital in Beijing to participate in semi-structured interviews (40–50 min’ duration). The data collected in this study were analyzed using the conventional content analysis approach proposed by Graneheim and Lundman. Results: After analyzing the data, two themes emerged: 1) Critical conditions under normalized pandemic prevention and control; 2) Concerns about loved ones and colleagues, along with financial problems. Both these themes further revealed four categories: the complexity and uncertainty of epidemic prevention and health hazards in the former, and concerns for and from families and colleagues, and financial stress in the latter. Conclusions: The results of this study provide valuable insights into the practical implementation of epidemic prevention and control measures in Chinese trauma centers and shed light on the psychological stress faced by nurses. Improving the tripartite support system of hospital, family, and society, and providing emotional support may help reduce stress among nurses, thereby improving their health and care quality.
Keywords	Stressor ; Trauma center ; COVID-19 ; Qualitative study ; China ; Science (General) ; Q1-390 ; Social sciences (General) ; H1-99
Subject code	360
Language	English
Publishing date	2023-10-01T00:00:00Z
Publisher	Elsevier
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

Full text online

Full text

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

Article ; Online: Dynamic structures and emerging trends in the management of major trauma

Zhe Du / Zhenzhou Wang / Fuzheng Guo / Tianbing Wang

Frontiers in Public Health, Vol

A bibliometric analysis of publications between 2012 and 2021

2022 Volume 10

Abstract: ObjectiveMajor trauma is currently a global public health issue with a massive impact on health at both the individual and population levels. However, there are limited bibliometric analyses on the management of major trauma. Thus, in this study we aimed ...

Abstract	ObjectiveMajor trauma is currently a global public health issue with a massive impact on health at both the individual and population levels. However, there are limited bibliometric analyses on the management of major trauma. Thus, in this study we aimed to identify global research trends, dynamic structures, and scientific frontiers in the management of major trauma between 2012 and 2021.MethodsWe searched the Web of Science Core Collection to access articles and reviews concerning the management of major traumas and conducted a bibliometric analysis using CiteSpace.ResultsOverall, 2,585 studies were screened and published by 403 institutions from 110 countries/regions. The most productive country and institution in this field of research were the USA and Monash University, respectively. Rolf Lefering was the most prolific researcher and Holcomb JB had the most co-citations. Injury published the highest number of articles, and the Journal of Trauma was the most co-cited journal. A dual-map overlay of the literature showed that the articles of most publications were confined to the areas of medicine/medical/clinical and neurology/sports/ophthalmology. Document clustering indicated severe traumatic brain injury, traumatic coagulopathy, and resuscitative endovascular balloon occlusion as the recent hot topics. The most recent burst keywords were “trauma management,” “neurocritical care,” “injury severity,” and “emergency medical services.”ConclusionThe dynamic structures and emerging trends in the management of major trauma were extensively analyzed using CiteSpace, a visualization software. Based on the analysis, the following research hotspots emerged: management of severe traumatic brain injury and massive hemorrhage, neurocritical care, injury severity, and emergency medical service. Our findings provide pertinent information for future research and contribute toward policy making in this field.
Keywords	major trauma ; management ; bibliometric analysis ; visualization ; CiteSpace ; Public aspects of medicine ; RA1-1270
Subject code	001 ; 306
Language	English
Publishing date	2022-11-01T00:00:00Z
Publisher	Frontiers Media S.A.
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

Full text online

Full text

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

Article ; Online: Research on magnetic bead motion characteristics based on magnetic beads preset technology

Zhao Li / Xiangyang Zu / Zhe Du / Zhigang Hu

Scientific Reports, Vol 11, Iss 1, Pp 1-

2021 Volume 13

Abstract: Abstract In order to improve the detection efficiency and accuracy of microfluidic chip, a magnetic beads preset technology were designed by using double permanent magnets as external magnetic field and the motion characteristics of preset magnetic beads ...

Abstract	Abstract In order to improve the detection efficiency and accuracy of microfluidic chip, a magnetic beads preset technology were designed by using double permanent magnets as external magnetic field and the motion characteristics of preset magnetic beads were studied. The control principle of magnetic beads preset technology was introduced in detail, and the control structure was designed. The coupled field characteristics for magnetic beads in microchannels were analyzed, and the motion models of magnetic beads were established based on the magnetic beads preset technology, including capture motion and mixing motion. The relationship between the magnetic field force and the flow velocity for capturing magnetic bead, and the mixing time under the influence of flow field and magnetic field were derived. The magnetic beads preset technology effect was verified by experiments and numerical simulations were developed to analyze the influence of aspect ratio of permanent magnet on magnetic field. The study showed that the accuracy and efficiency of the magnetic bead control in the microchannel could be better realized by the magnetic beads preset technology. The derivation of the magnetic bead motion model can understand the motion characteristics of the magnetic bead more clearly, facilitate accurate control of the magnetic bead, and improve the success rate of the microfluidic detection.
Keywords	Medicine ; R ; Science ; Q
Subject code	530
Language	English
Publishing date	2021-10-01T00:00:00Z
Publisher	Nature Portfolio
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

Full text online

Full text

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

Article ; Online: Topographic Gradient Differentiation and Ecological Function Zoning Based on Ecosystem Services

Ling He, Zhe Du, Jiabo Tian and Shuqi Chen

Nature Environment and Pollution Technology, Vol 22, Iss 2, Pp 541-

A Case Study of Fuping County

2023 Volume 552

Abstract: Scientifically delineating ecological function zones is essential for national territory spatial planning and comprehensive management. In this study, we evaluated five ecosystem services, habitat quality, water yield, carbon sequestration, soil ... ...

Abstract	Scientifically delineating ecological function zones is essential for national territory spatial planning and comprehensive management. In this study, we evaluated five ecosystem services, habitat quality, water yield, carbon sequestration, soil conservation, and food production, in Fuping County, China, and introduced the application of the topographic position index in exploring the topographic gradient effect of each service. We next applied the K-means clustering algorithm to identify the ecosystem services bundles and analyze the dominant type of ecosystem service in these bundles. A particle swarm optimization-support vector machine model was also constructed to identify the boundaries of ecological function zones and complete the ecological function zoning. The results are as follows: (1) In Fuping County, the high-value areas of habitat quality are distributed in the west, north, and southeast; those of soil conservation are in the northwest, northeast, and southwest; those of water yield are in the east and south; those of carbon sequestration are in the west, and those of food production is in the east. (2) The habitat quality first decreases and then increases with an increasing topographic gradient; food production and water yield decline with increasing topographic gradient; carbon sequestration and soil conservation increase with increasing topographic gradient. (3) Four types of ecosystem services bundles were identified. The dominant ecosystem functions of Type I, II, and III bundles are food production and water yield, carbon sequestration, and soil conservation, respectively. Type IV bundles generally have low levels of ecosystem services in the study area. (4) Four ecological function zones were delineated: food production zone, ecological conservation zone, potential restoration zone, and critical restoration zone. The research findings can provide a theoretical and practical basis for formulating and implementing ecological spatial management policies in the Taihang Mountains of China.
Keywords	topographic gradient effect k-means ; ecosystem services ; pso-svm ; ecological function zone ; Environmental effects of industries and plants ; TD194-195 ; Science (General) ; Q1-390
Subject code	333
Language	English
Publishing date	2023-06-01T00:00:00Z
Publisher	Technoscience Publications
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

Full text online

Full text

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

Article ; Online: Design of Structural Parameters of Cutters for Tea Harvest Based on Biomimetic Methodology

Zhe Du / Yongguang Hu / Yongzong Lu / Jing Pang / Xinping Li

Applied Bionics and Biomechanics, Vol

2021 Volume 2021

Abstract: Owing to their sharp teeth, crickets can eat through new shoots of the stalks of tea plants. Inspired by the special geometrical structure of the teeth of crickets, this study designed a biomimetic cutter to reduce the force and energy required to cut ... ...

Abstract	Owing to their sharp teeth, crickets can eat through new shoots of the stalks of tea plants. Inspired by the special geometrical structure of the teeth of crickets, this study designed a biomimetic cutter to reduce the force and energy required to cut the stalks of tea plants. Therefore, four biomimetic cutters were considered: a, b, c, and d. Cutter a was a traditional cutter used for comparison with the other three cutters, which were biomimetic. The cutters were manufactured using 3D printing technology and assessed by a texture tester at different loading speeds (5, 10, and 15 mm/s, respectively). The results show that cutter c delivered better performance compared to cutter a at loading speeds of 5, 10, and 15 mm/s, respectively. However, at 15 mm/s loading speed, the maximum cutting forces required for cutters b and c were 9.43% and 6.04% lower, respectively, than that for cutter a (9.021 N). Similarly, the energies consumed by cutters b and c were 13.8% and 4.24% lower than that consumed by cutter a (1.225 J). In addition, cutter c delivered the best results compared to others. Based on the study results, it was concluded that the biomimetic cutters can thus help to optimize the tea harvest.
Keywords	Biotechnology ; TP248.13-248.65 ; Biology (General) ; QH301-705.5
Subject code	670
Language	English
Publishing date	2021-01-01T00:00:00Z
Publisher	Hindawi Limited
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

Full text online

Full text

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

Article ; Online: Multiobjective preimpact trajectory planning of space manipulator for self-assembling a heavy payload

Yong Liu / Zhe Du / Zhe Wu / Fei Liu / Xiaojun Li

International Journal of Advanced Robotic Systems, Vol

2021 Volume 18

Abstract: To assemble a heavy payload to the spacecraft (free-floating base), the present study proposes a scheme of multiobjective trajectory planning for preimpact motion of redundant space manipulator (mounted on the base). Force impulse for self-assembly is ... ...

Abstract	To assemble a heavy payload to the spacecraft (free-floating base), the present study proposes a scheme of multiobjective trajectory planning for preimpact motion of redundant space manipulator (mounted on the base). Force impulse for self-assembly is derived as the function of joint angles/velocities, base pose, and impact direction. The trajectory planning problem is formulated as multiobjective optimization to minimize force impulse, base attitude disturbance, and energy consumption in the load-carrying process. A two-stage trajectory planning algorithm is proposed. To be specific, at the first stage, multiple desired configurations at the contact point are generated by position-level inverse kinematics with Newton–Raphson iterative method. At the second stage, joint trajectories satisfying joint angle limits and desired motion of the payload are parameterized by coefficients of sinusoidal polynomial functions. Multiobjective particle swarm optimization algorithm is adopted to solve the problem of multiobjective trajectory planning, and screening process is conducted to reserve nondominated solutions in limits of joint torques. The algorithm is implemented to a seven degrees of freedom space manipulator, and the effectiveness of the proposed method is verified by simulation results.
Keywords	Electronics ; TK7800-8360 ; Electronic computers. Computer science ; QA75.5-76.95
Subject code	629
Language	English
Publishing date	2021-02-01T00:00:00Z
Publisher	SAGE Publishing
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

Full text online

Full text

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

Article ; Online: Detection and assessment of nitrogen effect on cold tolerance for tea by hyperspectral reflectance with PLSR, PCR, and LM models

Eric Amoah Asante / Zhe Du / Yongzong Lu / Yongguang Hu

Information Processing in Agriculture, Vol 8, Iss 1, Pp 96-

2021 Volume 104

Abstract: Knowledge of nutrients effect on freezing tolerance is vital for protecting tea plants against cold injury (CI). Freezing injury treatments on tea leaves with different low temperature and nitrogen (N) concentration was evaluated by hyperspectral imaging ...

Abstract	Knowledge of nutrients effect on freezing tolerance is vital for protecting tea plants against cold injury (CI). Freezing injury treatments on tea leaves with different low temperature and nitrogen (N) concentration was evaluated by hyperspectral imaging based on the reflectance as potential analytical tool. Subsequently, quantitative evaluation of the CI was improved by comparing analyzed results using partial least squares regression (PLSR), principle component regression (PCR) and linear model (LM) models. Reflectance of the CI was obtained by hyperspectral imaging system in the band between 871 and 1766 nm. The results showed that average reflectance increases with the rise of N concentration. A substantial portion of the leaf from the plant with 100% N dosage had the darkest image and resulted in the highest reflectance because the N weakened the negative effect of freezing stress. Out of the five spectral domains tested, the best predictive accuracy for the CI of the tea leaf was achieved by PCR (R2 = 0.9971, RMSE = 0.0609) in 1410–1766 nm wavelength, followed by LM (R2 = 0.9999, RMSE = 0.0805) in 871–1000 nm. The whole interval had the worse prediction accuracy which could be caused by large variations in the data for a specific treatment and high absorption peak occurring around 1450 nm in the reflectance curve. The averages, R2 and RMSE for all the three statistical models showed that the worse prediction accuracy occurred in 1410–1766 nm, followed by the whole interval 871–1766 nm. The prediction accuracy was low which could be due to the strong water absorption peaks that appeared in both range of wavelengths. The models without absorption bands had improved correlation coefficient and reduced RMSE values between the measured and the predicted CI (R2 = 0.9676; RMSE = 0.3067) compared to the model developed with the reflectance values in the entire waveband (R2 = 0.9504; RMSE = 0.6629). The reflectance values where absorption bands occurred had detrimental effect on the model performance, which ...
Keywords	Cold injury ; Hyperspectral imaging ; Reflectance ; Principal component ; Agriculture (General) ; S1-972 ; Information technology ; T58.5-58.64
Subject code	333
Language	English
Publishing date	2021-03-01T00:00:00Z
Publisher	KeAi Communications Co., Ltd.
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

Full text online

Full text

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

Article ; Online: A Threat Intelligence Analysis Method Based on Feature Weighting and BERT-BiGRU for Industrial Internet of Things

Jingchen Yan / Zhe Du / Jifang Li / Shiduo Yang / Jinghao Li / Jianbin Li

Security and Communication Networks, Vol

2022 Volume 2022

Abstract: The combination of 5G technology and the industrial Internet of things (IIoT) makes it possible to realize the interconnection of all things. Still, it also increases the risk of attacks such as large-scale DDoS attacks and IP spoofing attacks. Threat ... ...

Abstract	The combination of 5G technology and the industrial Internet of things (IIoT) makes it possible to realize the interconnection of all things. Still, it also increases the risk of attacks such as large-scale DDoS attacks and IP spoofing attacks. Threat intelligence is a collection of information causing potential and nonpotential harm to the industrial Internet. Extracting network security entities and their relationships from threat intelligence text and constructing structured threat intelligence information are particularly important for IIoT security protection. However, threat intelligence is mostly text reports, which means the value information needs to be extracted manually by security analysts, and it is highly dependent on personnel experience. Therefore, this study proposes an IIoT threat intelligence analysis method based on feature weighting and BERT-BiGRU. In this method, BERT-BiGRU is used to classify attack behavior and attack strategy. Then, the attack behavior is weighted to make the classified result more accurate according to the relationship between attack strategy and attack behavior in ATT&CK for ICS knowledge. Finally, the possibility of attack and the harm degree of attack are calculated to form the threat value of the attack. The security analysts can judge the emergency response sequence by the threat value to improve the accuracy and efficiency of emergency response. The results indicate that the proposed method in this study is more accurate than the other standard methods and is more suitable for the unstructured threat intelligence analysis of IIoT.
Keywords	Technology (General) ; T1-995 ; Science (General) ; Q1-390
Subject code	303
Language	English
Publishing date	2022-01-01T00:00:00Z
Publisher	Hindawi-Wiley
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

Full text online

Full text

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

Article ; Online: Bionic Optimization Design and Experiment of Reciprocating Cutting System on Single-Row Tea Harvester

Zhe Du / Denghui Li / Jiangtao Ji / Liyuan Zhang / Xinping Li / Huankun Wang

Agronomy, Vol 12, Iss 1309, p

2022 Volume 1309

Abstract: The reciprocating cutting system is one of the key parts of a tea harvester; and its cutting performance directly determines the cutting power consumption and harvesting quality of the machine. Because the structural parameters of reciprocating cutting ... ...

Abstract	The reciprocating cutting system is one of the key parts of a tea harvester; and its cutting performance directly determines the cutting power consumption and harvesting quality of the machine. Because the structural parameters of reciprocating cutting systems do not match the tea cut; resulting in larger cutting resistance, it is necessary to optimize the structural parameters. The cricket mouth part has outstanding performance in tea tree fiber cutting; and the curved structural characteristics of the upper jaw of the cricket have been useful to improve the cutting efficiency of cutting system. Quantitative analysis of the structure of the upper jaw revealed that the arc-shaped structure of the incisor lobe would inspire new bionic blades and bionic cutters to solve the above problems. The cutting performance experiment of the cutting blade was designed for investigating the effects of inter-node number; tea variety and blade type (ordinary blade; bionic blade e and bionic blade f ) on the cutting force and cutting power consumption. Experimental results of cutting performance have shown that the bionic blade could reduce cutting resistance and cutting power consumption. Tea varieties had little effect on cutting force and cutting power consumption. In addition, the orthogonal test was carried out to study the influence of cutter type with the cutting speed ratio and cutting angle on the integrity rate and missing rate of tea shoot. The field cutting experiment showed that the cutting angle was the most important for the integrity rate and missing rate of tea shoot; followed by the cutter speed ratio; and finally, the cutter type. The optimum combination of parameters was a cutting speed of 0.8 m/s; a forward speed of 1.0 m/s; a cutting angle of −3°, and using the bionic cutter e . With the optimal parameter combination, the integrity rate and missing rate of the tea shoot were 92.7% and 3.9%, which were increased by 13.2% and decreased by 6.4% compared to those under the condition of the 0° cutting angle and ...
Keywords	bionic ; cutting system ; harvest ; cricket ; tea ; Agriculture ; S
Subject code	670
Language	English
Publishing date	2022-05-01T00:00:00Z
Publisher	MDPI AG
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

Full text online

Full text

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

Article ; Online: Feasibility of Magnetic Resonance Imaging Monitoring of Postoperative Total Knee Arthroplasty without Metal Artifacts

Xiangchao Meng / Zhe Du / You Wang

BioMed Research International, Vol

A Preliminary Study of a Novel Implant Model

2018 Volume 2018

Abstract: Background. Although magnetic resonance imaging (MRI) can provide superior detailed images of tissues without ionizing radiation, the imaging evaluation of total knee arthroplasty (TKA) complications and posttherapy changes can be limited because of ... ...

Abstract	Background. Although magnetic resonance imaging (MRI) can provide superior detailed images of tissues without ionizing radiation, the imaging evaluation of total knee arthroplasty (TKA) complications and posttherapy changes can be limited because of abundant artifacts on MRI scans due to metallic implants and endoprosthesis in limb salvage and fracture fixation. This study aimed to develop a novel model of TKA using a polyetheretherketone- (PEEK-) on-highly cross-linked polyethylene (HXLPE) implant and to investigate its feasibility for MRI monitoring of peri-implant bone formation, the healing process, signs of infection, and tumor recurrence after TKA. Methods. Three skeletally mature goats underwent TKA with the PEEK-on-HXLPE implant. Radiographic and MRI examinations were performed at 4 weeks postoperatively. Images were analyzed for the existence of artifact interruption and postoperative changes in the bone and peripheral soft tissue. Results. The results showed that PEEK and HXLPE were invisible, but the metal wires were clearly visualized on X-rays. On MRI scans, PEEK and HXLPE materials showed a low signal intensity, fine metal wires generated no obvious metal artifacts on MRI scans, and the marrow and soft tissue showed a continuous signal intensity without artifact interruption. Conclusions. This preliminary study introduced a novel model using PEEK-on-HXLPE knee implant for in vivo MRI monitoring of the region around the implant without metal artifacts. This novel model may be used to apply MRI to observe bone formation and the healing process around the prosthesis and the signs of infection and tumor recurrence after TKA. This model may be used to improve the diagnostic accuracy of postoperative complications of TKA clinically.
Keywords	Medicine ; R
Subject code	610
Language	English
Publishing date	2018-01-01T00:00:00Z
Publisher	Hindawi Limited
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

Full text online

Full text

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

To top

Full text online

More links

Kategorien

Inter-library loan at ZB MED

Full text online

More links

Kategorien

Inter-library loan at ZB MED

Full text online

More links

Kategorien

Inter-library loan at ZB MED

Full text online

More links

Kategorien

Inter-library loan at ZB MED

Full text online

More links

Kategorien

Inter-library loan at ZB MED

Full text online

More links

Kategorien

Inter-library loan at ZB MED

Full text online

More links

Kategorien

Inter-library loan at ZB MED

Full text online

More links

Kategorien

Inter-library loan at ZB MED

Full text online

More links

Kategorien

Inter-library loan at ZB MED

Full text online

More links

Kategorien

Inter-library loan at ZB MED