فیلترها/جستجو در نتایج    

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متن کامل


نویسندگان: 

GIARALIS A.

اطلاعات دوره: 
  • سال: 

    2017
  • دوره: 

    143
  • شماره: 

    -
  • صفحات: 

    256-285
تعامل: 
  • استنادات: 

    1
  • بازدید: 

    121
  • دانلود: 

    0
کلیدواژه: 
چکیده: 

شاخص‌های تعامل:   مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

بازدید 121

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نویسندگان: 

M. Shahrouzi M. Shahrouzi | M. Fahimi Farzam M. Fahimi Farzam | J. Gholizadeh J. Gholizadeh

اطلاعات دوره: 
  • سال: 

    2025
  • دوره: 

    15
  • شماره: 

    2
  • صفحات: 

    203-219
تعامل: 
  • استنادات: 

    0
  • بازدید: 

    8
  • دانلود: 

    0
چکیده: 

The tuned mass damper inerter systems have recently received considerable attention in the field of structural control. The present work offers a practical configuration of such a device, called double tuned mass damper inerter (DTMDI) that connects the inerter into the damper masses rather than be attached to the main structure. Soil-structure interaction is also taken into account for the soft and dense soils as well as for the fixed based condition. The H∞  norm of the transfer functions for the roof response is minimized as the objective function. The parameters of DTMDI are optimized using opposition-switching search as an efficient parameter-less algorithm in comparison with lightning attachment procedure optimization, sine cosine algorithm and particle swarm optimization. The system performance is evaluated in the frequency domain, as well as in the time domain under various earthquakes including far-field records, near-field records with forward directivity and with fling-step. The results show superiority of opposition-switching search for optimal design of the proposed DTMDI so that it can significantly reduce both the roof displacement and acceleration response for all the SSI conditions.

شاخص‌های تعامل:   مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

بازدید 8

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اطلاعات دوره: 
  • سال: 

    2023
  • دوره: 

    13
  • شماره: 

    4
  • صفحات: 

    779-788
تعامل: 
  • استنادات: 

    0
  • بازدید: 

    20
  • دانلود: 

    0
چکیده: 

Ochratoxin A (OTA) is a mycotoxin resulting from poor storage conditions while glyphosate is an herbicide used in agricultural production. Exposure to foods contaminated with these substances may result in unfavorable health problems.This study, therefore, aimed to estimate the exposure and characterize the risk of the Philippine general population, children, and women of childbearing age (WCBA) to OTA and glyphosate using the Theoretical Maximum Daily Intake (TMDI) approach based on WHO guidelines.The dietary exposure was estimated using individual food consumption data from the National Nutrition Survey 2008 combined with maximum levels set by relevant authorities. The risk was characterized by evaluating the exposure estimates against the set acceptable daily intake (ADI) for glyphosate, and permissible tolerable weekly intake (PTWI) for OTA.Results revealed that the population groups had low exposure to glyphosate at 16 to 59% of its ADI. Cereal grains and flour (98%) were found to be the major contributor to dietary intake. However, consumers among children and WCBA were highly exposed to OTA at 163 and 314% PTWI, respectively. Bread and rolls (57%) and maize (31%) were the major contributors of OTA among children and WCBA, respectively.Based on the findings, it is recommended to conduct a refined exposure assessment by analyzing actual OTA values of the identified food contributors to validate the results of this study.

شاخص‌های تعامل:   مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

بازدید 20

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مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources
نویسندگان: 

WANG PING | WANG XIAOCHUN

اطلاعات دوره: 
  • سال: 

    2018
  • دوره: 

    47
  • شماره: 

    12
  • صفحات: 

    1822-1831
تعامل: 
  • استنادات: 

    0
  • بازدید: 

    296
  • دانلود: 

    0
چکیده: 

Background: Anxiety and depression seriously affect sleep quality and mental health of perimenopausal wom-en. Time management training is of great value in relieving negative emotions and improving subjective well-being. This study aims to explore the effect of time management training on anxiety, depression, and sleep quality of perimenopausal women. Methods: From January 2018 to July 2018, 114 women with perimenopausal syndrome were randomly select-ed in Wuhan, Hubei Province of China as the objects of the experimental group (n=58) and the control group (n=56). The control group did not participate in any training in this study; time management training was con-ducted in the experimental group according to Getting Things Done, with a total of 12 training sessions over six months with two hours for each interval of two weeks. The effect of the intervention was evaluated before and after the experiment using relevant scales. Results: After the intervention, the Self-Rating Anxiety Scale (SAS) score and Self-Rating Depression Scale (SDS) score of the experimental group are lower than those of the control group (P<0. 05). The Pittsburgh Sleep Quality Index (PSQI) score and Time Management Disposition Inventory (TMDI) score of the experi-mental group are higher than those of the control group (P<0. 05). A positive correlation exists between the improvement in time management disposition and the improvement in anxiety, depression, and sleep quality (P<0. 001). Conclusion: Time management training has a positive effect on improving anxiety, depression, sleep quality, and time management disposition of perimenopausal women.

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بازدید 296

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