The Experts below are selected from a list of 96 Experts worldwide ranked by ideXlab platform
Robert L. Norton - One of the best experts on this subject based on the ideXlab platform.
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Cam Design and Manufacturing Handbook
2020Co-Authors: Robert L. NortonAbstract:Written by a professional with extensive practical and teaching experience in Mechanical Engineering. Cam Design and Manufacturing Handbook brings together up-to-date cam design technology, correct design and manufacturing procedures, and recent cam research results in one volume that is indispensable to the design and manufacturing of cam-follower systems. Beginning at an introductory level and progressing to more advanced topics, this comprehensive handbook includes complete coverage of: Proper Cam Design Techniques, Single- and Multi-Dwell Cams, Classical Cam Functions, Polynomial Cams, Spline Functions for Cams, Pressure Angle & Radius of Curvature, Radial and Barrel Cams, Translating & Oscillating Followers, Roller & Flat-Faced Followers, Forward & Inverse Dynamic Analyses, Residual Vibrations, Polydyne & Splinedyne Cams, Cam Profile Definition, Cutter Compensation, Conjugate Cams, Cam Materials & Manufacturing Techniques, Stress Analysis of the Cam Follower Joint, Lubrication of the Cam Follower Joint, Measurement of Cam Follower Dynamics, Extensive Bibliography. What's more, this unique book is accompanied by a 90-day trial demonstration copy of the Professional Version of Dynacam for Windows V. 7.0. Written by the author and used worldwide, this program solves the equations described in the book and allows in its fully Licensed Version the design, dynamic modeling, analysis, and generation of follower center, cam surface, and cutter coordinate data for any cam. It also defines conjugate cams for any cam design.
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Cam Design and Manufacturing Handbook with Cdrom
2001Co-Authors: Robert L. Norton, Thomas J. LydenAbstract:From the Publisher: The use of computers for engineering design, and in numerical control for manufacturing, has dramatically changed the cam design and manufacturing process. Additionally, cam design and manufacturing have been affected by a significant number of fundamental research results published in recent years. An invaluable resource, Cam Design and Manufacturing Handbook brings together up-to-date cam design technology, correct design and manufacturing procedures, and recent cam research results in one volume that is indispensable to the design and manufacturing of cam-follower systems. Beginning at an introductory level and progressing to more advanced topics, this comprehensive handbook provides all the information needed to properly design, model, analyze, specify, and manufacture cam-follower systems. This unique book is accompanied by a 90-day trial demonstration copy of the Professional Version of Dynacam for Windows V. 7.0. Written by the author and used worldwide, this program solves the equations described in the book and allows -- in its fully Licensed Version -- the design, dynamic modeling, analysis, and output of follower center, cam surface, and cutter coordinate data for any cam. It also defines conjugate cams for any application. Also included are 90-day trial demonstration copies of programs Fourbar, Sixbar, and Slider for the design of cam-follower linkages.
Claudia R. Pischke - One of the best experts on this subject based on the ideXlab platform.
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Corrigendum: Popular Diabetes Apps and the Impact of Diabetes App Use on Self-Care Behaviour: A Survey Among the Digital Community of Persons With Diabetes on Social Media
Frontiers in Endocrinology, 2019Co-Authors: Mihiretu Kebede, Claudia R. PischkeAbstract:Introduction: Evidence on whether diabetes apps improve diabetes self-care behavior in real-world settings is still limited. This study aimed to identify popular diabetes applications (apps) and to investigate the association of diabetes app use and other factors with cumulative self-care behavior. Methods: From November 2017 to March 2018, we conducted a web-based survey with persons 18 years of age and above. We recruited respondents via diabetes Facebook groups, online patient-forums and targeted Facebook advertisements (ads). Data on participants’ demographic, clinical, and self-management characteristics, as well as on self-care behavior and characteristics of the diabetes apps use were collected. Self-care behavior was measured using a Licensed Version of the Summary of Diabetes Self-care Activities (SDSCA) questionnaire. Questions regarding diabetes smartphone applications were adapted from the Mobile Application Rating Scale. To identify popular diabetes apps, users were requested to list all apps they use for diabetes self-management. Two sample t-test and multiple linear regression stratified by type of diabetes were performed to examine associations between app use and self-care behavior. Results: 1052 respondents with type 1 and 630 respondents with type 2 diabetes mellitus (DM) entered the survey. More than half, 549(52.2%), and one third, 210(33.3%), of respondents with type 1 and 2 DM, respectively, reported using diabetes apps for self-management. “mySugar” and continuous glucose monitoring apps, such as “Dexcom”, “Freestyle Libre”, and “Xdrip+” were some of the most popular diabetes apps. In both respondent groups, the cumulative self-care behavior score was significantly higher among diabetes app users (compared to non-users) and scores for three individual self-care components, namely “blood glucose monitoring”, “general diet”, and “physical activity” were significantly higher among diabetes app users than among non-users. After adjusting for confounding factors, diabetes app use increased the cumulative self-care score by 1.08(95%CI: 0.46-1.7) units among persons with type 1 DM and by 1.18(95%CI: 0.26 – 2.09) units among persons with type 2 DM, respectively. Conclusion: For both, persons with type 1 and type 2 diabetes, using diabetes apps for self-management was positively associated with self-care behavior. Our findings suggest that apps can support changes in lifestyle and glucose monitoring in these populations.
Yaşar Demir - One of the best experts on this subject based on the ideXlab platform.
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Evaluation of the efficacy in cosmetic products safety: Comparison with biochemical substrates
Regulatory Toxicology and Pharmacology, 2019Co-Authors: Yaşar Demir, Meryem Uckaya, Nazan DemirAbstract:Abstract Chemicals used in cosmetics must interact with the enzymes for their consumption after entering our bodies. The area at which the interaction realizes on the enzyme is known as the active center. This center is three dimensional and optically active. Considering the properties of the active regions, it is believed that the determination of the geometric properties of the chemicals may contribute to the safety evaluation of the chemical products. Obtainment of toxicological data of chemicals is a long and difficult process. It is an impossible process as the animal experiments have been prohibited. Since there are large number of chemical compounds available, it is not possible to conduct toxicological evaluation on all of them. Therefore, it is important to estimate whether chemicals are toxic through using molecular formulas. In this study, the similarities and differences between the unwanted chemicals used in cosmetic products and the geometric structures of the chemicals used in metabolism were determined by using Group Theory. The aim of the study is to estimate whether the chemicals will be toxic by taking advantage of point-group determinations. Molecular formulae of chemicals prohibited in cosmetics and substrates used in biological systems were used as materials. The point groups of the molecules were determined using these formulas. ChemDraw Professional 17 chemical drawing program was used to draw the formula structures of the molecules. Campus Licensed Version of the program provided by Ataturk University was utilized. An Excel application which was developed to examine the molecules according to the Group Theory was also used.
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Evaluation of the efficiency and safety in cosmetic products
International Journal of Pharmaceutics, 2016Co-Authors: Meryem Uckaya, Fatih Uckaya, Nazan Demir, Yaşar DemirAbstract:Abstract Chemicals used in cosmetics have to interact with enzymes for beneficial or destroy purpose after they enter in our body. Active sections of enzymes that catalyze reactions have three dimensions and they are active optically. When these limitations of catalytic sections are considered, it may be considered that defining geometric specifications of chemical materials and functional groups they contain may contribute on safety evaluations of cosmetic products. In this study, defining similarities and differences of geometric structures of chemicals that are prohibited to be used in cosmetic products and chemical that are allowed to be used by using group theory and analyze of functional groups that are often encountered in these chemicals are aimed. Molecule formulas related to chemical material of, 276 pieces chemicals that are prohibited to be used in cosmetic products and 65 pieces chemicals that are allowed, are used as the material. Two and three-dimension structures of these formulas are drawn and types and quantity of functional groups they contain are defined. And as a method, freeware (Free Trial) Version of “Chem-BioOffice Ultra 13.0 Suite” chemical drawing program to draw two and three-dimension of formulas, “Campus-Licensed” Version that are provided for use by our university of “Autodesk 3DS Max” for three-dimension drawings are used. In order to analyze geometric specifications of drawn molecules according to Group Theory and define type and quantity of available functional groups, Excel applications developed by Prof. Dr. Yasar Demir are used.
Thomas J. Lyden - One of the best experts on this subject based on the ideXlab platform.
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Cam Design and Manufacturing Handbook with Cdrom
2001Co-Authors: Robert L. Norton, Thomas J. LydenAbstract:From the Publisher: The use of computers for engineering design, and in numerical control for manufacturing, has dramatically changed the cam design and manufacturing process. Additionally, cam design and manufacturing have been affected by a significant number of fundamental research results published in recent years. An invaluable resource, Cam Design and Manufacturing Handbook brings together up-to-date cam design technology, correct design and manufacturing procedures, and recent cam research results in one volume that is indispensable to the design and manufacturing of cam-follower systems. Beginning at an introductory level and progressing to more advanced topics, this comprehensive handbook provides all the information needed to properly design, model, analyze, specify, and manufacture cam-follower systems. This unique book is accompanied by a 90-day trial demonstration copy of the Professional Version of Dynacam for Windows V. 7.0. Written by the author and used worldwide, this program solves the equations described in the book and allows -- in its fully Licensed Version -- the design, dynamic modeling, analysis, and output of follower center, cam surface, and cutter coordinate data for any cam. It also defines conjugate cams for any application. Also included are 90-day trial demonstration copies of programs Fourbar, Sixbar, and Slider for the design of cam-follower linkages.
Mihiretu Kebede - One of the best experts on this subject based on the ideXlab platform.
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Corrigendum: Popular Diabetes Apps and the Impact of Diabetes App Use on Self-Care Behaviour: A Survey Among the Digital Community of Persons With Diabetes on Social Media
Frontiers in Endocrinology, 2019Co-Authors: Mihiretu Kebede, Claudia R. PischkeAbstract:Introduction: Evidence on whether diabetes apps improve diabetes self-care behavior in real-world settings is still limited. This study aimed to identify popular diabetes applications (apps) and to investigate the association of diabetes app use and other factors with cumulative self-care behavior. Methods: From November 2017 to March 2018, we conducted a web-based survey with persons 18 years of age and above. We recruited respondents via diabetes Facebook groups, online patient-forums and targeted Facebook advertisements (ads). Data on participants’ demographic, clinical, and self-management characteristics, as well as on self-care behavior and characteristics of the diabetes apps use were collected. Self-care behavior was measured using a Licensed Version of the Summary of Diabetes Self-care Activities (SDSCA) questionnaire. Questions regarding diabetes smartphone applications were adapted from the Mobile Application Rating Scale. To identify popular diabetes apps, users were requested to list all apps they use for diabetes self-management. Two sample t-test and multiple linear regression stratified by type of diabetes were performed to examine associations between app use and self-care behavior. Results: 1052 respondents with type 1 and 630 respondents with type 2 diabetes mellitus (DM) entered the survey. More than half, 549(52.2%), and one third, 210(33.3%), of respondents with type 1 and 2 DM, respectively, reported using diabetes apps for self-management. “mySugar” and continuous glucose monitoring apps, such as “Dexcom”, “Freestyle Libre”, and “Xdrip+” were some of the most popular diabetes apps. In both respondent groups, the cumulative self-care behavior score was significantly higher among diabetes app users (compared to non-users) and scores for three individual self-care components, namely “blood glucose monitoring”, “general diet”, and “physical activity” were significantly higher among diabetes app users than among non-users. After adjusting for confounding factors, diabetes app use increased the cumulative self-care score by 1.08(95%CI: 0.46-1.7) units among persons with type 1 DM and by 1.18(95%CI: 0.26 – 2.09) units among persons with type 2 DM, respectively. Conclusion: For both, persons with type 1 and type 2 diabetes, using diabetes apps for self-management was positively associated with self-care behavior. Our findings suggest that apps can support changes in lifestyle and glucose monitoring in these populations.