Our aim in the present article is to introduce and study types of retraction of one dimensional manifold. New types of geodesics in one dimensional manifold are presented. The deformation retracts of one dimensional m...Our aim in the present article is to introduce and study types of retraction of one dimensional manifold. New types of geodesics in one dimensional manifold are presented. The deformation retracts of one dimensional manifold into itself and onto geodesics is deduced. Also, the isometric and topological folding in each case and the relation between the deformations retracts after and before folding has been obtained. New types of conditional folding are described.展开更多
Our aim in the present article is to introduce and study new types of retractions of Lobachevsky space. Types of the deformation retracts of Lobachevsky space are presented. The relations between the folding and the d...Our aim in the present article is to introduce and study new types of retractions of Lobachevsky space. Types of the deformation retracts of Lobachevsky space are presented. The relations between the folding and the deformation retract of Lobachevsky space are deduced. Types of minimal retractions of Lobachevsky space are also presented. Also, the isometric and topological folding in each case and the relation between the deformation retracts after and before folding have been obtained. New types of homotopy maps are deduced. Theorems governing this connection are achieved.展开更多
We will introduce a new connection between some transformations and some aspects of differential geometry of some curves in Minkowski space. The concept of folding, retractions and contraction on some curves in Minkow...We will introduce a new connection between some transformations and some aspects of differential geometry of some curves in Minkowski space. The concept of folding, retractions and contraction on some curves in Minkowski space will be characterized by using some aspects of differential geometry. Types of the deformation retracts of some curves in Minkowski 3-space are obtained. The relations between the foldings and the deformation retracts of some curves are deduced. The connections between some transformations and time like, space like, light like of some curves in Minkowski 3-space are also presented.展开更多
The utilization of research papers has been crucial in facilitating pandemic decision-making and management.Despite the unprecedented surge of scientific publications in response to the COVID-19 outbreak,the retractio...The utilization of research papers has been crucial in facilitating pandemic decision-making and management.Despite the unprecedented surge of scientific publications in response to the COVID-19 outbreak,the retraction of papers related to data has been increasingly frequent,indicating shortcomings in the quality control of current research data.In this study,we aim to examine the root causes and characteristics of data-related retractions amidst the deluge of pandemic research papers,with a particular focus on articles that contain flaws stemming from issues related to research data quality.Our findings suggest that retractions related to data quality deficiencies indicate a dearth of actors and mechanisms within the research quality management landscape.The monitoring and control of data quality cannot be left solely to the self-regulation of the academic community.Hence,our study proposes recommendations for ensuring research data quality in pandemic publications from three perspectives:the management of scientific research quality,data sharing and evaluation mechanisms;publication and dissemination scrutiny mechanisms;and academic early warning and tolerance mechanisms.展开更多
Ethical standards in the context of scientific publications are increasingly gaining attention. A narrative review of the literature concerning publication ethics wasconducted as found in Pub Med, Google Scholar, rele...Ethical standards in the context of scientific publications are increasingly gaining attention. A narrative review of the literature concerning publication ethics wasconducted as found in Pub Med, Google Scholar, relevant news articles, position papers, websites and other sources. The Committee on Publication Ethics has produced guidelines and schedules for the handling of problem situations that have been adopted by professional journals and publishers worldwide as guidelines to authors. The defined requirements go beyond the disclosure of conflicts of interest or the prior registration of clinical trials. Recommendations to authors, editors and publishers of journals and research institutions were formulated with regard to issues of authorship, double publications, plagiarism, and conflicts of interest, with special attention being paid to unethical research behavior and data falsification. This narrative review focusses on ethical publishing in intensive care medicine. As scientific misconduct with data falsification damage patients and society, especially if fraudulent studies are considered important or favor certain therapies and downplay their side effects, it is important to ensure that only studies are published that have been carried out with highest integrity according to predefined criteria. For that also the peer review process has to be conducted in accordance with the highest possible scientific standards and making use of available modern information technology. The review provides the current state of recommendations that are considered to be most relevant particularly in the field of intensive care medicine.展开更多
The interest for telemedicine has increased since the COVID-19 pandemic because of the risk of infection.Recently,commercial companies started selling digital USB-otoscopes(DUO)that can be connected to a mobile phone....The interest for telemedicine has increased since the COVID-19 pandemic because of the risk of infection.Recently,commercial companies started selling digital USB-otoscopes(DUO)that can be connected to a mobile phone.These DUOs are inexpensive(costing approximately$6e35 each)and make it possible to visualize the whole tympanic membrane.Here,we illustrate the case of a patient who had operative correction of a tympanic membrane retraction,and who self-monitored the tympanic membrane in the course of time.Additionally,we discuss the use of DUOs in otolaryngology telemedicine practice.The use of simple digital USB otoscopes provides a promising method to assess and monitor the tympanic membrane remotely.However,more research is needed to establish the role of DUOs in telemedicine.展开更多
The mechanism of a retracting cantilevered beam has been investigated by the invariant and energy-based analysis. The time-varying parameter partial differential equation governing the transverse vibrations of a beam ...The mechanism of a retracting cantilevered beam has been investigated by the invariant and energy-based analysis. The time-varying parameter partial differential equation governing the transverse vibrations of a beam with retracting motion is derived based on the momentum theorem. The assumed-mode method is used to truncate the governing partial differential equation into a set of ordinary differential equations (ODEs) with time-dependent coefficients. It is found that if the order of truncation is not less than the order of the initial conditions, the assumed-mode method can yield accurate results. The energy transfers among assumed modes are discussed during retraction. The total energy varying with time has been investigated by numerical and analytical methods, and the results have good agreement with each other. For the transverse vibrations of the axially retracting beam, the adiabatic invariant is derived by both the averaging method and the Bessel function method. (C) 2016 Chinese Society of Aeronautics and Astronautics. Production and hosting by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license.展开更多
文摘Our aim in the present article is to introduce and study types of retraction of one dimensional manifold. New types of geodesics in one dimensional manifold are presented. The deformation retracts of one dimensional manifold into itself and onto geodesics is deduced. Also, the isometric and topological folding in each case and the relation between the deformations retracts after and before folding has been obtained. New types of conditional folding are described.
文摘Our aim in the present article is to introduce and study new types of retractions of Lobachevsky space. Types of the deformation retracts of Lobachevsky space are presented. The relations between the folding and the deformation retract of Lobachevsky space are deduced. Types of minimal retractions of Lobachevsky space are also presented. Also, the isometric and topological folding in each case and the relation between the deformation retracts after and before folding have been obtained. New types of homotopy maps are deduced. Theorems governing this connection are achieved.
文摘We will introduce a new connection between some transformations and some aspects of differential geometry of some curves in Minkowski space. The concept of folding, retractions and contraction on some curves in Minkowski space will be characterized by using some aspects of differential geometry. Types of the deformation retracts of some curves in Minkowski 3-space are obtained. The relations between the foldings and the deformation retracts of some curves are deduced. The connections between some transformations and time like, space like, light like of some curves in Minkowski 3-space are also presented.
基金supported by National Social Science Foundation of China(21CTQ017).
文摘The utilization of research papers has been crucial in facilitating pandemic decision-making and management.Despite the unprecedented surge of scientific publications in response to the COVID-19 outbreak,the retraction of papers related to data has been increasingly frequent,indicating shortcomings in the quality control of current research data.In this study,we aim to examine the root causes and characteristics of data-related retractions amidst the deluge of pandemic research papers,with a particular focus on articles that contain flaws stemming from issues related to research data quality.Our findings suggest that retractions related to data quality deficiencies indicate a dearth of actors and mechanisms within the research quality management landscape.The monitoring and control of data quality cannot be left solely to the self-regulation of the academic community.Hence,our study proposes recommendations for ensuring research data quality in pandemic publications from three perspectives:the management of scientific research quality,data sharing and evaluation mechanisms;publication and dissemination scrutiny mechanisms;and academic early warning and tolerance mechanisms.
文摘Ethical standards in the context of scientific publications are increasingly gaining attention. A narrative review of the literature concerning publication ethics wasconducted as found in Pub Med, Google Scholar, relevant news articles, position papers, websites and other sources. The Committee on Publication Ethics has produced guidelines and schedules for the handling of problem situations that have been adopted by professional journals and publishers worldwide as guidelines to authors. The defined requirements go beyond the disclosure of conflicts of interest or the prior registration of clinical trials. Recommendations to authors, editors and publishers of journals and research institutions were formulated with regard to issues of authorship, double publications, plagiarism, and conflicts of interest, with special attention being paid to unethical research behavior and data falsification. This narrative review focusses on ethical publishing in intensive care medicine. As scientific misconduct with data falsification damage patients and society, especially if fraudulent studies are considered important or favor certain therapies and downplay their side effects, it is important to ensure that only studies are published that have been carried out with highest integrity according to predefined criteria. For that also the peer review process has to be conducted in accordance with the highest possible scientific standards and making use of available modern information technology. The review provides the current state of recommendations that are considered to be most relevant particularly in the field of intensive care medicine.
文摘The interest for telemedicine has increased since the COVID-19 pandemic because of the risk of infection.Recently,commercial companies started selling digital USB-otoscopes(DUO)that can be connected to a mobile phone.These DUOs are inexpensive(costing approximately$6e35 each)and make it possible to visualize the whole tympanic membrane.Here,we illustrate the case of a patient who had operative correction of a tympanic membrane retraction,and who self-monitored the tympanic membrane in the course of time.Additionally,we discuss the use of DUOs in otolaryngology telemedicine practice.The use of simple digital USB otoscopes provides a promising method to assess and monitor the tympanic membrane remotely.However,more research is needed to establish the role of DUOs in telemedicine.
基金supported by the National Natural Science Foundation of China (Nos. 11322214, 11172010, 11290152 and 11402007)supported by the Natural Sciences and Engineering Research Council (NSERC) of Canada, the Canada Research Chair (CRC) Program+1 种基金the Bizkaia Talent Grant under the Basque Government through the BERC 2014–2017 ProgramSpanish Ministry of Economy and Competitiveness MINECO:BCAM Severo Ochoa excellence accreditation SEV-2013-0323
文摘The mechanism of a retracting cantilevered beam has been investigated by the invariant and energy-based analysis. The time-varying parameter partial differential equation governing the transverse vibrations of a beam with retracting motion is derived based on the momentum theorem. The assumed-mode method is used to truncate the governing partial differential equation into a set of ordinary differential equations (ODEs) with time-dependent coefficients. It is found that if the order of truncation is not less than the order of the initial conditions, the assumed-mode method can yield accurate results. The energy transfers among assumed modes are discussed during retraction. The total energy varying with time has been investigated by numerical and analytical methods, and the results have good agreement with each other. For the transverse vibrations of the axially retracting beam, the adiabatic invariant is derived by both the averaging method and the Bessel function method. (C) 2016 Chinese Society of Aeronautics and Astronautics. Production and hosting by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license.
