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Author(s): 

Azimi Milad | Jahan Morteza

Issue Info: 
  • Year: 

    2024
  • Volume: 

    13
  • Issue: 

    25
  • Pages: 

    65-81
Measures: 
  • Citations: 

    0
  • Views: 

    22
  • Downloads: 

    0
Abstract: 

This study focuses on the investigation of intelligent form-FINDING and vibration analysis of a triangular polyhedral tensegrity that is enclosed within a sphere and subjected to external loads. The nonlinear dynamic equations of the system are derived using the Lagrangian approach and the finite element method. The proposed form-FINDING approach, which is based on a basic genetic algorithm, can determine regular or irregular tensegrity shapes without dimensional constraints. Stable tensegrity structures are generated from random configurations and based on defined constraints (nodes located on the sphere, parallelism, and area of upper and lower surfaces), and shape FINDING is performed using the fitness function of the genetic algorithm and multi-objective optimization goals. The genetic algorithm's efficacy in determining the shape of structures with unpredictable configurations is evaluated in two distinct scenarios: one involving a known connection matrix and the other involving fixed or random member positions (struts and cables). The shapes obtained from the algorithm suggested in this study are validated using the force density approach, and their vibration characteristics are examined. The FINDINGs of the comparative study demonstrate the efficacy of the proposed methodology in determining the vibrational behavior of tensegrity structures through the utilization of intelligent shape seeking techniques.

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Author(s): 

YAZDANPARAST A.

Issue Info: 
  • Year: 

    2007
  • Volume: 

    9
  • Issue: 

    2
  • Pages: 

    161-167
Measures: 
  • Citations: 

    0
  • Views: 

    1588
  • Downloads: 

    0
Abstract: 

Background: HEART disease in infants and children may often lead to rapid decompensation. Therefore, early diagnosis is essential because modern medicine and surgery can cure many HEART defects. A cardiac murmur can be the first sign of a serious structural cardiac disease. Abnormal auscultatory FINDINGs, usually murmurs, are the most common reason for referral to the pediatric cardiologist. Methods: In a case series study, children and adolescents with HEART murmurs, referred to or admitted at Fatemeh Zahra (S) Hospital of Bushehr University of Medical Sciences, were evaluated between 2001 and 2006. The age range of participants was from birth to 18 years old. Chest x-ray, ECG, and echocardiography were done for them in addition to history taking and physical examination. Results: A total of 715 (56.2% male and 43.8% female) children and adolescents were included in our study (33.6% adolescents, 27.4% neonates, 22.7% infants and 16.3% children). A total of 59% of the cases had structural HEART defects (organic), 27.3% had functional murmurs, and 13.7 % had acquired diseases. The most prevalent malformations were ventricular septal defects (26.2%), tetrology of Fallot (9.1%), and patent ductus arteriosus (8.7%); 23.3% of participants had growth retardation. Conclusion: HEART murmur may be the first sign of an underlying HEART disease, and timely referral of children with a murmur for echocardiography is essential for diagnosis.

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Issue Info: 
  • Year: 

    2004
  • Volume: 

    19
Measures: 
  • Views: 

    150
  • Downloads: 

    0
Keywords: 
Abstract: 

TRANSMISSION LINES IS ONE OF THE MOST IMPORTANT PART IN POWER ELECTRIC INDUSTRY OF COUNTRY AND ALARGE AMOUNT OF MONEY SHOULD BE PAID FOR ITS INSTALLATION.LONG DISTANCE AND IMPROPPER PATH IS A FINANCIAL FACTOR AND CAN INCRESA COSTS UP TO THIRTY PERCENT OF PROJECTS COSTS.THIS PAPER DESCRIBES A NEW METHOD IN SELECTING LINE ROUTE WHICH WILL BE PERFORMED BY USE OF REMOTE SENSING AND SATTELITE PICTURES AND GEOGRAPHIC INFORMATION SYSTEMS.

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Author(s): 

GHAEMI M. | MANSOURI M.

Issue Info: 
  • Year: 

    2005
  • Volume: 

    8
  • Issue: 

    1
  • Pages: 

    99-95
Measures: 
  • Citations: 

    0
  • Views: 

    1072
  • Downloads: 

    0
Abstract: 

Objective: Management of nipple discharge by clinical FINDING. Materials and Methods: All of the data on patients referred for nipple discharge in period from 1990-2000 at the Department of Surgery IMAM REZA Hospital were reviewed. Results: The breast nodularity and duct ectasia was seen in 73% of patients. The age of the patient in this group was 30-40 years. Only 10 of 249 patients (5%) who presented with nipple discharge were proved to have carcinoma of the breast. Conclusion: Breast nodularity and duct ectasia is the most cause of nipple discharge (73%). Nipple discharge was not commonly associated with carcinoma and when it was the carcinoma was almost always palpable.  

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Journal: 

طب و تزکیه

Issue Info: 
  • Year: 

    1386
  • Volume: 

    15
  • Issue: 

    2-1(مسلسل 65-64)
  • Pages: 

    54-65
Measures: 
  • Citations: 

    0
  • Views: 

    1189
  • Downloads: 

    0
Abstract: 

استفاده از دستگاه های کمکی قلب از روش های تهاجمی بسیار موثر می باشد که به منظور حمایت موقت یا دایم بطن چپ، بطن راست و یا هر دو بطن برای رسیدن به یک ثبات وضعیت همودینامیک در بیمار استفاده می شود. جهت استفاده صحیح از این دستگاه ها، پزشکان، پرستاران متخصص بخش های مراقبت های ویژه و پرفیوژینست های متخصص دستگاه های کمکی قلب باید قادر به شناخت عملکرد انواع این دستگاه ها، موارد استفاده موارد منع استفاده و نحوه مراقبت از بیمار، عوارض و نحوه جداسازی بیمار از دستگاه و آموزش های مورد نیاز به بیمار باشند. بدلیل استفاده روزافزون از این وسیله این مقاله به توضیح بسیار خلاصه شده موارد فوق می پردازد و هدف از آن آشنایی هر چه بیشتر پرسنل بخش های جراحی قلب با این وسیله می باشد.

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Author(s): 

SAMET H.

Issue Info: 
  • Year: 

    1982
  • Volume: 

    18
  • Issue: 

    1
  • Pages: 

    37-57
Measures: 
  • Citations: 

    1
  • Views: 

    103
  • Downloads: 

    0
Keywords: 
Abstract: 

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

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Issue Info: 
  • Year: 

    1391
  • Volume: 

    36
  • Issue: 

    3
  • Pages: 

    163-166
Measures: 
  • Citations: 

    0
  • Views: 

    7384
  • Downloads: 

    0
Abstract: 

تاکنون مطالعات بسیاری بر روی تغییرات ضربان قلب صورت گرفته است. این تغییرات سیگنال قلبی که در دو ضربان متوالی مشاهده می شود را تغییرپذیری ضربان قلب یا HEART Rate Variability (HRV) می نامند. تغییرات کوتاه مدت و بلندمدت در ضربان قلب بازتابی از عملکرد سیستم عصبی اتونوم می باشد، به طوری که یکی از شاخص های سلامت انسان، افزایش و یا کاهش تغییر پذیری ضربان قلب (HRV) است. بنابر این آنالیز این تغییرات می تواند معیار پیش بینی کننده مرگ ناگهانی و یا هشدار در مورد بیماری قریب الوقوعی باشد. لذا با دانستن تکنیکهای آنالیز HRV و تجزیه و تحلیل این تغییرات به صورت غیرتهاجمی می توان اطلاعات صحیحی از تغییر عملکرد سیستم اتونوم بدست آورد.

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Author(s): 

SADI AHMAD | NASIRIAN SAFAR

Issue Info: 
  • Year: 

    2016
  • Volume: 

    12
  • Issue: 

    44
  • Pages: 

    161-178
Measures: 
  • Citations: 

    0
  • Views: 

    1223
  • Downloads: 

    0
Abstract: 

The book “the Quran History” is the most important writing of the orientalists about the Quran and the history of the Islam History. The writer of this book, Noldeke, is an eminent orientalist who has written books in different fields of orientalism. The above-mentioned book which is his most important work in this regard includes topics such as revelation studies, collection and compilation of the Quran as well as the date of the revelation of verses and surahs of the Quran that the paper deals with the topics of the first type. From Noldeke’s viewpoint, the nature of prophecy relies on four principles including: having connection with the previous prophets, adherence to emotional instinct, using imagination in receiving revelation, and creating social changes. This type of viewpoint toward the nature of prophecy which is related to the theory of religious experience about revelation, in addition to being out of the essence of the teachings of the divine religions, is in opposition with Islamic religious thought and faces some problems within each one of these principles.

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Issue Info: 
  • Year: 

    2022
  • Volume: 

    5
  • Issue: 

    2
  • Pages: 

    39-46
Measures: 
  • Citations: 

    0
  • Views: 

    39
  • Downloads: 

    24
Abstract: 

Statistics, extraction, analysis are vital in sports science. Information technology and data science will significantly increase the quality of research and decisions of sports clubs and organizations. Currently, many coaches and sports institutions use analytics and statistics that are calculated manually. Sports science shows that winning a match depends on different factors. The purpose of the research is to improve team performance by analyzing social networks, communication networks (such as players' passes and transactions during the match), and analyzing repetitive areas. These results are done by analyzing the data collected from 4 matches of the Persepolis team, including three matches from the first half of the Iranian Premier League in 2018-1399 and a Persepolis match against Al-Sharjah. This research examines the issue from two interconnected aspects: 1-Examining the performance of players individually and as part of a social network. 2-explore the communication network between players and land areas. This analysis uses the innovative method of identifying and classifying motifs.

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Issue Info: 
  • Year: 

    1400
  • Volume: 

    21
  • Issue: 

    11
  • Pages: 

    219-241
Measures: 
  • Citations: 

    0
  • Views: 

    161
  • Downloads: 

    0
Abstract: 

یافتن معنا در جهانی ناکامل، اثری از پروفسور ایدو لاندو، کتابی است که به زبانی صمیمی نگاشته شده و سرشار از مثال هایی برگرفته از زندگی نویسنده، تاریخ، سینما و ادبیات است. لاندو در این کتاب می کوشد استدلا ل ها و توصیه هایی عملی به دست دهد برای اینکه ما را متوجه جنبه های پیشاپیش معنادار زندگی های معمولی مان سازد و نشان دهد چگونه، در صورت لزوم، می توانیم این معناداری را افزایش دهیم. وی در این کتاب با استدلا ل های رایجی در ادبیات بحث رودرو می شود که زندگی ما را کاملا یا نه چنان که شاید بی معنا می سازند، از جمله این استدلال ها، استدلال های مبتنی بر کمال گرایی، وجود رنج و شر، مرگ و نابودی کامل انسان و حتی کل جهان و. . . است. بر وفق نظر لاندو، این استدلال ها در نهایت می توانند از معنای زندگی بکاهند، اما آن را یک سره محو نمی کنند. ما همچنان و حتی در صورت اعتبار چنین استدلال هایی می توانیم جنبه های به اندازه ی بسنده معناداری در زندگی مان بیایم، جنبه هایی که در نهایت حاکی از ارزش ذاتی زندگی تک تک ما انسان هاست. کتاب با ارایه ی راهبردهایی عملی برای یافتن و بازشناسی این جنبه ها پایان می یابد. در مقاله ی کنونی پس از بیان لب مطلب هر فصل از کتاب، دیدگاه انتقادی خودم را درباره ی راهبردهای لاندو برای به چالش کشیدن استدلال ها علیه معناداری زندگی تقریر می کنم.

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