http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Saimy, Ismail (검색결과 4 건)
- 무료
- 기관 내 무료
- 유료
-
Su, Tin Tin,Sallehuddin, Bin Abu Bakar,Murniati, Hj Hussain,Swinder, Jit,Sadat, Nabilla Al,Saimy, Ismail Asian Pacific Journal of Cancer Prevention 2012 Asian Pacific journal of cancer prevention Vol.13 No.1
The objective of the study is to investigate the success rate of quit attempts and identify factors associated with success or failure of quit attempts in a quit smoking clinic. A cohort study was conducted with 495 smokers who enrolled in a quit smoking clinic from 2005 to 2008. The factors leading to quit smoking successfully were "being Malay", "having high blood pressure" "type of Nicotine Replacement Therapy" and "duration of follow up". In contrast, clerical staff had negative association to quit smoking. People who started smoking in their teenage years had a high risk of relapse. Integration of active follow up and tailor-made support programmes for quitters appear necessary in order to maintain their non-smoking status and encourage them to be permanent quitters. Integration of quit smoking clinics and primary care clinics could be another potential step for the success of quit smoking programmes.
-
Ahmed Saimi,Ismail Bensaid,Ihab Eddine Houalef Techno-Press 2023 Advances in materials research Vol.12 No.2
In this paper, a size-dependent dynamic investigation of a porous metal foams microbeamsis presented. The novelty of this study is to use a metal foam microbeam that contain porosities based on the refined high order shear deformation beam model, with sinusoidal shear strain function, and the modified strain gradient theory (MSGT) for the first time. The Lagrange's principle combined with differential quadrature hierarchicalfinite element method (DQHFEM) are used to obtain the porous microbeam governing equations. The solutions are presented for the natural frequencies of the porous and homogeneoustype microbeam. The obtained results are validated with the analytical methods found in the literature, in order to confirm the accuracy of the presented resolution method. The influences of the shape of porosity distribution, slenderness ratio, microbeam thickness, and porosity coefficient on the free vibration of the porous microbeams are explored in detail. The results of this paper can be used in various design formetallic foammicro-structuresin engineering.
-
고리형 황화물을 포함하는 폴리아크릴레이트 합성과 설폭사이드 및 설폰 변환을 통한 굴절률 변화
허기석(Gisuk Heo),김새미(Saimi Kim),도정윤(Jung Yun Do) 한국고분자학회 2016 폴리머 Vol.40 No.3
황을 포함하는 고리형 아크릴레이트 단분자를 사용하여 고굴절률의 공중합 아크릴고분자 4종을 합성하였다. 황을 포함한 7-각 고리, 1,3-dithiane, 1,3-dithiolane 유도체를 사용하여 4가지의 아크릴 단분자를 합성하였고, 이를 methyl methacrylate(MMA)와 중량비로 3:7의 공중합고분자를 합성하였다. 오존(O₃)과 3-chloroperoxybenzoic acid (m-CPBA)를 사용하여 고분자에 포함된 황을 산화시켜 각각 SO와 SO₂를 갖는 고분자를 얻었다. 적외선 흡수 분광법(FTIR)과 수소핵자기공명분광(1H NMR) 분석을 통해 이러한 산화반응이 선택적으로 잘 진행되었음을 확인하였다. 합성된 고분자에 포함된 황의 함량에 따라 굴절률이 증가되는 것을 관찰하였다. 황이 SO로 산화되었을 때는 고분자의 굴절률이 증가하였고 SO₂로 산화되었을 때는 크게 감소하였다. SO₂를 갖는 단분자로 합성된 고분자와, 고분자의 산화로 SO₂ 를 갖는 고분자가 서로 유사한 성질을 보임으로써 고분자에 존재하는 황이 대부분 산화되었음을 확인하였다. 황산화 반응을 통해 고분자의 Abbe number는 증가되었다. 파장에 따른 굴절률을 계산하였고 산화반응을 통한 굴절률 변화가 모든 파장에 대해 유사하게 일어났음을 확인하였다. Polyacrylates with pending alkylsulfur groups were prepared to examine the changes in refractive index (RI) induced by sulfur oxidation. Four methacrylate monomers having cyclic alkylsulfur groups, such as 1,3-dithiane and 1,3- dithiolane derivatives, and 3,6-dithiacycloheptanol were developed. The monomers were copolymerized with methyl methacrylate through a radical polymerization. Oxidation of the prepared sulfur-polymers by O₃ and 3-chloroperoxybenzoic acid led to the formation of the corresponding SO and SO₂-polymers, respectively. The selective transformation of sulfur occurred completely and confirmed by FTIR and 1H NMR analysis. The RI of the polymer increased and decreased due to the formation of SO and SO₂, respectively. The SO₂-polymer exhibited a RI comparable to a polymer that was prepared using a sulfone-monomer. The Abbe number of the polymer increased after oxidation. The RI dispersion over various wavelengths was compared before and after oxidation.
-
Fethi, Hadjoui,Ahmed, Saimi,Ismail, Bensaid,Abdelhamid, Hadjoui Techno-Press 2023 Advances in aircraft and spacecraft science Vol.10 No.1
The present study proposes a theoretical and numerical investigation on the dynamic response behaviour of a functional graded (FG) ceramic-metal tapered rotor shaft system, by the differential quadrature finite elements method (DQFEM) to identify the natural frequencies for modelling and analysis of the structure with suitable validations. The purpose of this paper is to explore the influence of heat gradients on the natural frequency of rotation of FG shafts via three-dimensional solid elements, as well as a theoretical examination using the Timoshenko beam mode, which took into account the gyroscopic effect and rotational inertia. The functionally graded material's distribution is described by two distribution laws: the power law and the exponential law. To simulate varied thermal conditions, radial temperature distributions are obtained using the nonlinear temperature distribution (NLTD) and exponential temperature distribution (ETD) approaches. This work deals with the results of the effect on the fundamental frequencies of different material's laws gradation and temperature gradients distributions. Attempts are conducted to identify adequate explanations for the behaviours based on material characteristics. The effect of taper angle and material distribution on the dynamic behaviour of the FG conical rotor system is discussed.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
