LIVIVO - The Search Portal for Life Sciences

zur deutschen Oberfläche wechseln
Advanced search

Search results

Result 1 - 10 of total 1507

Search options

  1. Article ; Online: EFFECT OF EXERCISE ON INSULIN RESISTANCE IN OBESE TYPE 2 DIABETES PATIENTS

    Bin Zhang

    Revista Brasileira de Medicina do Esporte, Vol 28, Iss 1, Pp 59-

    2022  Volume 61

    Abstract: ABSTRACT Introduction: Type 2 diabetes mellitus (T2DM), also known as non-insulin-dependent diabetes mellitus (NIDDM), accounts for more than 90% of the total number of diabetes mellitus cases and often occurs in middle-aged and elderly people. Objective: ...

    Abstract ABSTRACT Introduction: Type 2 diabetes mellitus (T2DM), also known as non-insulin-dependent diabetes mellitus (NIDDM), accounts for more than 90% of the total number of diabetes mellitus cases and often occurs in middle-aged and elderly people. Objective: To investigate the effect of exercise intervention on insulin resistance in obese type 2 diabetes patients. Methods: Eighty-six obese diabetic patients were screened as experimental subjects in physical examinations and randomly divided into observation and control groups. Visceral fat volume, fasting blood glucose, and fasting insulin of all subjects were measured before and after completion of the 6-month experimental implementation. The insulin resistance was calculated for both groups and the values for each indicator were compared statistically between groups. Results: Control of body weight, body mass index, blood glucose, blood lipids and insulin resistance index were better in the observation group than in the control group, and the difference was statistically significant (P < 0.05). Conclusions: Basal intervention with quantitative exercise can significantly improve insulin resistance in obese type 2 diabetes patients and the effect is better than treatment with diet and conventional exercise. Level of evidence II; Therapeutic studies - investigation of treatment results.
    Keywords Insulinum ; Sports ; Diabetes Mellitus Complication ; Sports medicine ; RC1200-1245
    Subject code 796 ; 571
    Language English
    Publishing date 2022-01-01T00:00:00Z
    Publisher Sociedade Brasileira de Medicina do Esporte
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    More links

    Kategorien

  2. Article ; Online: The impacts of registration-and-fixation device positioning on the performance of implant placement assisted by dynamic computer-aided surgery: A randomized controlled trial.

    Wu, Bin-Zhang / Sun, Feng

    Clinical oral implants research

    2024  Volume 35, Issue 4, Page(s) 386–395

    Abstract: Objectives: To assess the efficacy of dynamic computer-aided surgery (dCAS) in replacing a single missing posterior tooth, we compare outcomes when using registration-and-fixation devices positioned anterior or posterior to the surgical site. ... ...

    Abstract Objectives: To assess the efficacy of dynamic computer-aided surgery (dCAS) in replacing a single missing posterior tooth, we compare outcomes when using registration-and-fixation devices positioned anterior or posterior to the surgical site. Registration is performed on either the anterior or opposite posterior teeth.
    Methods: Forty individuals needing posterior single-tooth implant placement were randomly assigned to anterior or posterior registration. Nine parameters were analyzed to detect the deviations between planned and actual implant placement, using Mann-Whitney and t-tests for nonnormally and normally distributed data, respectively.
    Results: The overall average angular deviation for this study was 2.08 ± 1.12°, with the respective average 3D platform and apex deviations of 0.77 ± 0.32 mm and 0.88 ± 0.32 mm. Angular deviation values for individuals in the anterior and posterior registration groups were 1.58°(IQR: 0.98°-2.38°) and 2.25°(IQR: 1.46°-3.43°), respectively (p = .165), with 3D platform deviations of 0.81 ± 0.29 mm and 0.74 ± 0.36 mm (p = .464), as well as 3D apex deviations of 0.89 ± 0.32 mm and 0.88 ± 0.33 mm (p = .986). No significant variations in absolute buccolingual (platform, p = .659; apex, p = .063), apicocoronal (platform, p = .671; apex, p = .649), or mesiodistal (platform, p = .134; apex, p = .355) deviations were observed at either analyzed levels.
    Conclusions: Both anterior and posterior registration approaches facilitate accurate dCAS-mediated implant placement for single missing posterior teeth. The device's placement (posterior-to or anterior-to the surgical site) did not affect the clinician's ability to achieve the planned implant location.
    MeSH term(s) Humans ; Dental Implantation, Endosseous ; Dental Implants ; Cone-Beam Computed Tomography ; Surgery, Computer-Assisted ; Tooth ; Computer-Aided Design ; Imaging, Three-Dimensional
    Chemical Substances Dental Implants
    Language English
    Publishing date 2024-01-29
    Publishing country Denmark
    Document type Randomized Controlled Trial ; Journal Article
    ZDB-ID 1067626-0
    ISSN 1600-0501 ; 0905-7161
    ISSN (online) 1600-0501
    ISSN 0905-7161
    DOI 10.1111/clr.14237
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  3. Article ; Online: Stackelberg-Nash Equilibrium and Perfect Competition in the Solow-Uzawa Growth Model

    Wei-Bin Zhang

    Lecturas de Economía, Iss 96, Pp 315-

    2022  Volume 343

    Abstract: This study introduces Stackelberg-Nash equilibrium to neoclassical growth theory. It attempts to make neoclassical economic growth theory more robust in modelling the complexity of market structures. The model is constructed within the framework of the ... ...

    Abstract This study introduces Stackelberg-Nash equilibrium to neoclassical growth theory. It attempts to make neoclassical economic growth theory more robust in modelling the complexity of market structures. The model is constructed within the framework of the Solow-Uzawa two-sector model. The economy is composed of two sectors. The final goods sector is the same as in the Solow one-sector growth model which is characterized by perfect competition. The consumer goods sector is the same as the consumer goods sector in the Uzawa model but is characterized by Stackelberg duopoly. We model household behavior with Zhang’s concept of disposable income and utility. The model endogenously determines profits of duopoly which are equally distributed among the homogeneous population. We build the model and then identify the existence of an equilibrium point through simulation. We conduct comparative static analyses of some parameters. We also compare the economic performance of the traditional Uzawa model and the model with the Stackelberg-Nash equilibrium. We conclude that the imperfect competition increases national output, national wealth, and utility level in comparison to perfect competition.
    Keywords stackelberg competition ; leader and follower ; perfect competition ; capital accumulation ; solow model ; uzawa model ; profit ; Economic history and conditions ; HC10-1085 ; Economics as a science ; HB71-74
    Subject code 330
    Language English
    Publishing date 2022-02-01T00:00:00Z
    Publisher Universidad de Antioquia
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    More links

    Kategorien

  4. Article ; Online: Evaluation of ecosystem service value and vulnerability analysis of China national nature reserves

    Bin Zhang / Lu Li

    Ecological Indicators, Vol 149, Iss , Pp 110188- (2023)

    A case study of Shennongjia Forest Region

    2023  

    Abstract: Accurate assessment of the ecosystem service value (ESV) of China National Nature Reserves is of great significance to the protection of regional ecological environment. In this paper, taking Shennongjia Forest Region as an example, based on the land use ...

    Abstract Accurate assessment of the ecosystem service value (ESV) of China National Nature Reserves is of great significance to the protection of regional ecological environment. In this paper, taking Shennongjia Forest Region as an example, based on the land use data of three phases in 2000, 2010 and 2020, we quantitatively evaluate the spatiotemporal evolution characteristics of the regional ESV, and use the FLUS model to simulate the land use layouts and the spatial distribution characteristics of the ESV under the two scenarios in 2035, and carry out the vulnerability analysis of the regional ecosystem services. The conclusions are as follows: (1) From 2000 to 2020, the overall ESV in Shennongjia Forest Region decreased by 15.48 million yuan, and support services and regulation services always played a decisive role in the overall ESV. (2) The area of cultivated land and grassland continued to shrink from 2000 to 2020, resulting in the reduction of ESV by 2.6 million yuan and 3.67 million yuan respectively. The contribution of woodland to the ESV was the largest, accounting for more than 95% in the three periods. (3) Under the natural development scenario, cultivated land, woodland and grassland continue to decline. Under the ecological protection scenario, the area of cultivated land decreases even more, but the area of woodland and grassland increases, and the layouts of construction land are more compact. The potential impact (PI) indexes of the region in 2000–2010 and 2010–2020 were negative, while that in 2020-2035Q1 is −2.01, which further worsens the vulnerability of ecosystem services. However, the PI index in 2020-2035Q2 turns positive, which is 2.29, indicating that the goal of the regional government to protect the ecological space under this scenario is basically realized. The research results can provide some reference for Shennongjia Forest Region and other National Nature Reserves to give consideration to both ecological environment protection and high-quality development.
    Keywords China National Nature Reserves ; Shennongjia Forest Region ; Ecosystem service value ; Land use change ; Vulnerability ; Ecology ; QH540-549.5
    Subject code 710
    Language English
    Publishing date 2023-05-01T00:00:00Z
    Publisher Elsevier
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    More links

    Kategorien

  5. Article ; Online: Conhecimento Global e Riqueza com Capital Humano Nacional e Comércio Livre

    Wei-Bin Zhang

    Notas Económicas, Iss

    2021  Volume 52

    Abstract: Este documento trata de questões de crescimento económico global com riqueza privada endógena, capital humano nacional, e conhecimento global. Construímos um modelo de crescimento multinacional entre a acumulação de riqueza, a mudança do capital humano e ...

    Abstract Este documento trata de questões de crescimento económico global com riqueza privada endógena, capital humano nacional, e conhecimento global. Construímos um modelo de crescimento multinacional entre a acumulação de riqueza, a mudança do capital humano e o crescimento do conhecimento, integrando os mecanismos económicos básicos em algumas teorias. O modelo é enquadrado na teoria do crescimento neoclássico. A acumulação de capital humano baseia-se no modelo biossectormal Uzawa-Lucas. O padrão comercial é determinado como no modelo comercial de Oniki-Uzawa. O crescimento do conhecimento é influenciado pela nova teoria do crescimento. O comportamento das famílias é modelado usando o conceito de Zhang de rendimento disponível e função de utilidade. A dinâmica da economia mundial do país J é descrita por 2J+1 equações diferenciais de riqueza, capital humano e conhecimento. Simulamos o movimento da economia global com base em três economias. Também realizamos uma análise dinâmica comparativa para mostrar como as mudanças nas características nacionais, tais como propensão para poupar, propensão para receber educação, eficiência na aplicação do capital humano e criatividade, mudam os caminhos dinâmicos do desenvolvimento económico global e doméstico.
    Keywords Crescimento ; comércio internacional ; capital humano ; riqueza ; criatividade ; política de investigação ; Economic history and conditions ; HC10-1085 ; Economics as a science ; HB71-74
    Language English
    Publishing date 2021-04-01T00:00:00Z
    Publisher Coimbra University Press
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    More links

    Kategorien

  6. Article ; Online: Shrinkage estimators of large covariance matrices with Toeplitz targets in array signal processing

    Bin Zhang / Shoucheng Yuan

    Scientific Reports, Vol 12, Iss 1, Pp 1-

    2022  Volume 13

    Abstract: Abstract The problem of estimating a large covariance matrix arises in various statistical applications. This paper develops new covariance matrix estimators based on shrinkage regularization. Individually, we consider two kinds of Toeplitz-structured ... ...

    Abstract Abstract The problem of estimating a large covariance matrix arises in various statistical applications. This paper develops new covariance matrix estimators based on shrinkage regularization. Individually, we consider two kinds of Toeplitz-structured target matrices as the data come from the complex Gaussian distribution. We derive the optimal tuning parameter under the mean squared error criterion in closed form by discovering the mathematical properties of the two target matrices. We get some vital moment properties of the complex Wishart distribution, then simplify the optimal tuning parameter. By unbiasedly estimating the unknown scalar quantities involved in the optimal tuning parameter, we propose two shrinkage estimators available in the large-dimensional setting. For verifying the performance of the proposed covariance matrix estimators, we provide some numerical simulations and applications to array signal processing compared to some existing estimators.
    Keywords Medicine ; R ; Science ; Q
    Subject code 519
    Language English
    Publishing date 2022-11-01T00:00:00Z
    Publisher Nature Portfolio
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    More links

    Kategorien

  7. Article ; Online: SDN Control Strategy and QoS Optimization Simulation Performance Based on Improved Algorithm

    Bin Zhang / Xin Liu

    Computational Intelligence and Neuroscience, Vol

    2022  Volume 2022

    Abstract: In the past few years, the Internet has become more and more popular, and more and more people use the Internet. A lot of new software has been developed on the Internet, so the network traffic has increased rapidly. A company once clearly stated that, ... ...

    Abstract In the past few years, the Internet has become more and more popular, and more and more people use the Internet. A lot of new software has been developed on the Internet, so the network traffic has increased rapidly. A company once clearly stated that, in the future, the network volume in our country will reach nearly 5 zb. In addition, the network is comprehensively unified, and the learning of the Internet is strengthened by the way of suggesting errors. It is also necessary to learn from the external environment to make the finite value of the network as good as possible. Reinforcement learning is about solving many difficult problems. Use reinforcement learning to promote and change this state, so that the advantages of the network can be fully developed. Regarding the environment and actions at the time as the basic mapping requirements, and the network technology strategy can be best developed. In order to solve the QoS optimization scheme of the current mainstream heuristic algorithm in the software-defined network scene, the software-defined network QoS optimization algorithm is proposed. First, the network resources and status information are unified into the network model, and then, the long- and short-term memory network is used to improve the algorithm's flow perception ability. Finally, based on the deep reinforcement learning algorithm, a dynamic traffic scheduling strategy that satisfies the QoS objective is constructed. Among them, QoS refers to the main functions of the entire network system, especially for some new users, but for many old users, this system can represent a certain application, for example, whether a certain software can get timely, whether it can work smoothly when processing videos, and whether it can be interrupted when making a voice call for improvement.
    Keywords Computer applications to medicine. Medical informatics ; R858-859.7 ; Neurosciences. Biological psychiatry. Neuropsychiatry ; RC321-571
    Subject code 303
    Language English
    Publishing date 2022-01-01T00:00:00Z
    Publisher Hindawi Limited
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    More links

    Kategorien

  8. Article ; Online: Systematic discovery and feature analysis of intertwined symmetric protein motifs for topology engineering

    Lianjie Xu / Puqing Deng / Hanyu Gao / Wen-Bin Zhang

    Giant, Vol 17, Iss , Pp 100226- (2024)

    2024  

    Abstract: Naturally occurring nontrivial protein topologies not only draw increasing attention on the relationships between topology and protein function, but also stimulate research endeavors in harnessing topology as a unique dimension for protein engineering. ... ...

    Abstract Naturally occurring nontrivial protein topologies not only draw increasing attention on the relationships between topology and protein function, but also stimulate research endeavors in harnessing topology as a unique dimension for protein engineering. However, artificial design and synthesis of protein topologies is still in its infancy with successes only on a few simple topologies and its development is limited by the small number of intertwined protein motifs known to date. Herein, we report a systematic framework for the discovery of symmetric intertwined protein motifs from Protein Data Bank. The symmetric protein assemblies were screened based on their calculated Gauss linking number to assess their extent of chain intertwining. Then, the potential of such symmetric intertwined motifs in designing complex protein topologies is evaluated based on several parameters, including buried surface area, N-C terminal distances and so on, giving rise to a library of premium intertwined motifs useful for protein topology engineering. Taking C2 assemblies for example, the potential biological significances of chain intertwining in protein architectures are also discussed based on the analysis of their postulated biological functions. With an expanded toolbox of intertwined motifs, the design space of topological proteins would be greatly expanded to enable a broader scope for the application of protein topology engineering.
    Keywords Protein topology ; Intertwined motifs ; Gauss linking number ; Protein assembly ; Science (General) ; Q1-390
    Subject code 612
    Language English
    Publishing date 2024-03-01T00:00:00Z
    Publisher Elsevier
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    More links

    Kategorien

  9. Article ; Online: Gender Power and Family Decision in an Extended Solowian Economic Growth Model

    Wei-Bin Zhang

    Technium Social Sciences Journal, Vol 5, Pp 70-

    2020  Volume 83

    Abstract: The purpose of this paper is to deal with dynamic interdependence between economic growth and family-based behavior. The decision unit on consumption and saving is the family which is composed of the husband and the wife. The model endogenously ... ...

    Abstract The purpose of this paper is to deal with dynamic interdependence between economic growth and family-based behavior. The decision unit on consumption and saving is the family which is composed of the husband and the wife. The model endogenously determines national growth, family goods, family wealth, and gender-differentiated consumption and labor supply with fixed distribution of power between the husband and the wife. The model is based on synthesizing a few approaches in economics. The growth mechanism and economic structure are based on a generalized Solowian growth model. The household behavior is based on Zhang’s concept of disposable income and utility. The power distribution is referred to the collective approach by Basu (2006). We first develop the model and study dynamic behavior of the model. We conduct comparative dynamic analyses to demonstrate how economic growth interacts with family behavior by allowing exogenous changes in gender power distribution, gender-based preferences and human capital, and national technological changes.
    Keywords gender power ; family decision ; economic growth ; solow model ; Social sciences (General) ; H1-99
    Language English
    Publishing date 2020-03-01T00:00:00Z
    Publisher Technium Science
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    More links

    Kategorien

  10. Article ; Online: INFLATION AND GROWTH WITH THE MIU APPROACH AND THE EQUATION OF EXCHANGE

    WEI-BIN ZHANG

    Social Sciences and Education Research Review, Vol 7, Iss 1, Pp 45-

    2020  Volume 71

    Abstract: The purpose of this paper is to study a relationship between growth and inflation on the basis of the Tobin growth model. We deviate from the Tobin approach by determining money demand with the money-in-utility (MIU) approach. The utility is affected by ... ...

    Abstract The purpose of this paper is to study a relationship between growth and inflation on the basis of the Tobin growth model. We deviate from the Tobin approach by determining money demand with the money-in-utility (MIU) approach. The utility is affected by money holding. The utility function is applied by an alternative approach proposed by Zhang. The wealth accumulation a key determinant of economic growth. The government supplies money which is described by the traditional equation of exchange. The velocity of money is determined as a function of the rate of interest as in the Baumol-Tobin model. We build the dynamic model and simulate the motion of the model. We carry out comparative dynamic analysis in various parameters.
    Keywords inflation ; tobin growth model ; equation of exchange ; baumol-tobin model ; miu approach ; Education (General) ; L7-991 ; Social sciences (General) ; H1-99
    Language English
    Publishing date 2020-07-01T00:00:00Z
    Publisher Editura Sitech
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    More links

    Kategorien

To top