نتایج جستجو برای: جرم و فنر mss

تعداد نتایج: 762802  

ژورنال: :علوم مکانیک در ماشین های کشاورزی 0
احمد تقی زاده علی سرایی استادیار گروه مهندسی مکانیک ماشینهای کشاورزی دانشگاه علوم کشاورزی و منابع طبیعی گرگان برات قبادیان دانشیار گروه مهندسی مکانیک ماشینهای کشاورزی دانشگاه تربیت مدرس حسینعلی شمس آبادی استادیار گروه مهندسی مکانیک ماشینهای کشاورزی دانشگاه علوم کشاورزی و منابع طبیعی گرگان

ارتعاشات منتقل شده از ماشین​ها می تواند تاثیرات نامطلوب بر جسم و کارایی انسان بگذارد. در این مقاله، تاثیرات لرزش جرم های انعطاف‎پذیر اعضای بدن و ارتعاش کامل یا جزئی انتقال یافته از طریق دست و بازو در طی استفاده از تراکتور دوچرخ میتسوبیشی بررسی شدند. در این تحقیق، مدل مکانیکی- ارتعاشی بدن کاربر و تراکتور دو چرخ با استفاده از جرم، فنر و میراکننده‎ها شبیه سازی شد. برای این منظور، سیستمی با چهار در...

2015
Qun Zhang Abdou Youssef

Similarity search in math is to find mathematical expressions that are similar to a user’s query. We conceptualized the similarity factors between mathematical expressions, and proposed an approach to math similarity search (MSS) by defining metrics based on those similarity factors [11]. Our preliminary implementation indicated the advantage of MSS compared to nonsimilarity based search. In or...

2015
Hyun Yoon Gwang Seok Kim Sung Gil Kim Ae Eun Moon

The present study was conducted to assess the relationship between metabolic syndrome and metabolic syndrome score (MSS) and serum vitamin D levels in adults aged 20 or older (n = 5,483) using 2012 Korean National Health and Nutrition Examination Survey data, which represents national data in Korea. Key study results were as follows: First, serum 25-hydroxyvitamin D [25(OH)D] levels decreased s...

Journal: :Journal of medical ethics 2006
H-H Chiang Y-M Yu Chao Y-S Yuh

BACKGROUND Although maternal serum screening (MSS) for Down's syndrome has become routinely available in most obstetric clinics in many countries, few studies have addressed the reasons why women agree to undergo the MSS test. OBJECTIVES The aims of this study were to describe the circumstances in which MSS was offered to pregnant women and their reasons for undertaking it. METHODS Particip...

Journal: :European journal of public health 2015
Alessio Santoro Andrea Silenzi Walter Ricciardi Martin McKee

The European Union Directive on cross-border health care places an obligation on member states (MSs) to establish one or more national contact points (NCPs). We evaluated whether MSs were meeting their legal obligations. Two researchers created a set of criteria, drawn from the Directive, to evaluate the information that 18 MSs provide on their NCP websites. Some 15 of the 18 MSs evaluated prov...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه پیام نور - دانشگاه پیام نور استان تهران - دانشکده فیزیک 1390

با پیشرفت روزافزون علم نانو، بررسی خواص فونونی و گرمایی سامانه هایی در ابعاد نانو از اهمیت بسیاری برخوردار است. در این پایان نامه به بررسی ضریب عبور فونونی و رسانندگی گرمایی زنجیره های جرم-فنر شامل ناخالصی ها با در نظر گرفتن اثر نیروی خطی و غیر خطیبا استفاده از روش ماتریس انتقال می پردازیم. دیده می شود که با افزایش جرم ناخالصی ها و هم چنین افزایش قدرت فنر های بین آن ها ضریب عبور فونونی و در نتی...

2015
Brandon S. Walker Richard E. Nelson Brian R. Jackson David G. Grenache Edward R. Ashwood Robert L. Schmidt Sinuhe Hahn

BACKGROUND Non-invasive prenatal testing (NIPT) is a relatively new technology for diagnosis of fetal aneuploidies. NIPT is more accurate than conventional maternal serum screening (MSS) but is also more costly. Contingent NIPT may provide a cost-effective alternative to universal NIPT screening. Contingent screening used a two-stage process in which risk is assessed by MSS in the first stage a...

2017
Panagiotis Kallidonis Dimitrios Kotsiris Francesco Sanguedolce Panteleimon Ntasiotis Evangelos Liatsikos Athanasios Papatsoris

Objective To review the literature on the effectiveness, safety and long-term patency of ureteric metal mesh stents (MSs), as a variety of MSs have been used for managing malignant ureteric obstruction over the last three decades. Materials and methods A systematic review using the search string; Ureter∗ AND (stent OR endoprosthesis) AND metal∗ was conducted on PubMed, Scopus, Web of science ...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2013
Joshua J Reineke Daniel Y Cho Yu-Ting Dingle A Peter Morello Jules Jacob Christopher G Thanos Edith Mathiowitz

Polymeric microspheres (MSs) have received attention for their potential to improve the delivery of drugs with poor oral bioavailability. Although MSs can be absorbed into the absorptive epithelium of the small intestine, little is known about the physiologic mechanisms that are responsible for their cellular trafficking. In these experiments, nonbiodegradable polystyrene MSs (diameter range: 5...

Journal: :British journal of sports medicine 1987
J W Priest R D Hagan

Maximum aerobic power (VO2 max), maximum anaerobic power (AP max), submaximal exercise heart rate (HRsub), and performance times for distances of 15m, 600 m, 3.22 km, and 10 km were evaluated in 12 male runners prior to and after 7 weeks of a running programme at each individual's maximum steady-state (MSS) pace. MSS pace, a running speed at which blood lactate is believed to equal 2.2 mmol . l...

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