International Review of Physics最新文献_第8页

Polarization Dynamics in Multimode CO2 Laser by Optical Feedback 基于光反馈的多模CO2激光器偏振动力学研究

International Review of Physics Pub Date : 2013-12-31 DOI: 10.15866/IREPHY.V7I6.4455

K. A. Naimee

引用次数: 0

Dielectric Behavior and A.C Conductivity of Cd2Si1-xGexO4 Compound Cd2Si1-xGexO4化合物的介电性能和交流电导率

International Review of Physics Pub Date : 2013-12-31 DOI: 10.15866/IREPHY.V7I6.4456

K. Wadi

引用次数: 0

Effect of Electron Reflection in Multipaction Prediction for TE10 Mode Rectangular Waveguide Couplers 电子反射在TE10模矩形波导耦合器多作用预测中的影响

International Review of Physics Pub Date : 2013-12-31 DOI: 10.15866/IREPHY.V7I6.4458

E. C. Henry, Y. Adediran

引用次数: 0

Synthesis of ZnO Nanostructure by Sol-Gel Spin Coating Method 溶胶-凝胶自旋镀膜法制备ZnO纳米结构

International Review of Physics Pub Date : 2013-12-31 DOI: 10.15866/IREPHY.V7I6.4460

R. Sabry, Mohamed M Hassan, Taghrid Saadoun Muhsin

{"title":"Synthesis of ZnO Nanostructure by Sol-Gel Spin Coating Method","authors":"R. Sabry, Mohamed M Hassan, Taghrid Saadoun Muhsin","doi":"10.15866/IREPHY.V7I6.4460","DOIUrl":"https://doi.org/10.15866/IREPHY.V7I6.4460","url":null,"abstract":"In this study, we use spinning methods to coat glass slides with sol-gel ZnO thin films, composed of zinc acetatedihydrate, monoethanolamine (MEA), 2-Methoxethanol. The effect of the annealing temperature on the structural morphology and optical properties of these films was investigated. These ZnO films were preheated at 100 oC for 10 min and annealed at 350, 500 and 550 ˚C for 60 min. As-deposited films, formed by amorphous zinc oxide-acetate submicron particles, are transformed into a highly-oriented ZnO after thermal treatment. The surface morphology, phase structure and optical properties of the thin films were investigated by scanning electron microscopy (SEM), atomic force microscopy (AFM), X-ray diffraction (XRD) and optical transmittance. Both techniques produced nanostructured ZnO thin films with well-defined orientation. The annealed films were transparent in the visible range with an absorption edge at about 375 nm and a transmittance of 80% with an average diameter of 40 nm. XRD results show the film was composed of polycrystalline wurtzite, with a preferential c-axis orientation of (002) and a single sharp XRD peak at 34.40, corresponding to the hexagonal ZnO. The grain size with increasing the annealing temperature.","PeriodicalId":448231,"journal":{"name":"International Review of Physics","volume":"174 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125798972","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Simple Solution of the Relativistic Dirac Equation for a Particle in a Central Potential and an Example 有中心势的粒子相对论狄拉克方程的简单解及一个例子

International Review of Physics Pub Date : 2013-10-31 DOI: 10.15866/IREPHY.V7I5.4453

H. Erbil

引用次数: 1

Monthly Reference Frequency Distributions of Daily Clearness Index Data from Burundian Stations 布隆迪气象站每日晴空指数数据的月参考频率分布

International Review of Physics Pub Date : 2013-10-31 DOI: 10.15866/IREPHY.V7I5.4449

M. Bashahu, E. Manirakiza

{"title":"Monthly Reference Frequency Distributions of Daily Clearness Index Data from Burundian Stations","authors":"M. Bashahu, E. Manirakiza","doi":"10.15866/IREPHY.V7I5.4449","DOIUrl":"https://doi.org/10.15866/IREPHY.V7I5.4449","url":null,"abstract":"A 6-years period (1994-1999) data of the daily global solar irradiation (G) from six Burundian stations have been statistically analyzed in this paper. The observed monthly frequency distributions of the daily clearness index (kt) exhibit the following features: (i) most of them are asymmetrical and have only one maximum; (ii) frequency distributions with higher monthly averages ¯(k_t ) and lower standard deviations are noticed in the dry season, i.e. from June to August or September; (iii) at the opposite, broader fluctuations and lower ¯(k_t ) values are observed in the remaining period of the year (rainy seasons); (iv) the yearly averages ¯(k_t ) range from 0.41 to 0.59. This indicates that in average the sky over Burundi is a fairly sunny one. Moreover, a statistical test (the F-test) has been used to check for each station if the monthly samples with the same ¯(k_t ) had also the same variance. The null hypothesis has been accepted for all the ¯(k_t ) intervals of interest (excepted one) for the six stations. Those monthly samples must belong to the same mother population, and have therefore the same statistical distribution, referred to as a monthly reference frequency distribution. Such reference distributions have been built for the six stations and the relevant ¯(k_t ) intervals of interest. They would be useful for designing solar energy systems at the Burundian stations of this study and for predicting the long-term average performance of those systems.","PeriodicalId":448231,"journal":{"name":"International Review of Physics","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122166381","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Reducing the Gold Film Residual Stress by Using the Crystalline Piezoelectric Property in Piezoelectric/Au Thin Films 利用压电/金薄膜的晶体压电特性降低金薄膜的残余应力

International Review of Physics Pub Date : 2013-10-31 DOI: 10.15866/IREPHY.V7I5.4452

A. Komijani, R. Shahi, A. I. Gaynarje, S. Sadatserky, B. Firoozi

{"title":"Reducing the Gold Film Residual Stress by Using the Crystalline Piezoelectric Property in Piezoelectric/Au Thin Films","authors":"A. Komijani, R. Shahi, A. I. Gaynarje, S. Sadatserky, B. Firoozi","doi":"10.15866/IREPHY.V7I5.4452","DOIUrl":"https://doi.org/10.15866/IREPHY.V7I5.4452","url":null,"abstract":"This work proposes a successful and novel method to significantly reduce the residual stresses of a 40 nanometer gold film in piezoelectric/Au thin films to improve the quality and mechanical properties of Au film. The gold film with 40 nm thickness is deposited on piezoelectric by means of diode sputtering system. Sample phases were examined using (XRD) analysis and the film residual stress is measured by the X-ray diffraction method. The numerical value of residual stress, has been obtained as 4.88±4.54 (MPa). Afterward, the 10 (kHz) frequencies with 12 volt amplitude were applied to the piezoelectric as substrate during 20 minutes. Subsequently, the residual stress values, was reduced to 2.68±1.63 (MPa). As a consequence, we were able to reduce the gold film residual stress through a new method, using the crystalline piezoelectric property. To obtain any information about structural changes in the film, X-ray diffraction measurements were performed. At the end of this article, the reasons for stress reduction that is related to the changes in full width-half maximum (FWHM), crystal aggregation, d-spacing and grain sizes factors of thin films has been investigated.","PeriodicalId":448231,"journal":{"name":"International Review of Physics","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115892599","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Unified Quantum Statistics, Possible Violation of Pauli Exclusion Principle, Nonlinear Equations and Some Basic Problems of Entropy 统一量子统计，泡利不相容原理的可能违反，非线性方程和熵的一些基本问题

International Review of Physics Pub Date : 2013-08-31 DOI: 10.15866/IREPHY.V7I4.4440

Yi-Fang Chang

引用次数: 2

Effect of Doping (2_Methyl Naphthalene) on Aromatic System (2_Methyl Naphthalene-Anthracene) 掺杂(2_甲基萘)对芳香体系(2_甲基萘-蒽)的影响

International Review of Physics Pub Date : 2013-08-31 DOI: 10.15866/IREPHY.V7I4.4446

Z. Saleh, Ali Kadhim Wadday, M. Hassan

{"title":"Effect of Doping (2_Methyl Naphthalene) on Aromatic System (2_Methyl Naphthalene-Anthracene)","authors":"Z. Saleh, Ali Kadhim Wadday, M. Hassan","doi":"10.15866/IREPHY.V7I4.4446","DOIUrl":"https://doi.org/10.15866/IREPHY.V7I4.4446","url":null,"abstract":"In this work, study of absorption and fluorescence spectra for compound (anthracene genitive 2 - methyl naphthalene) dissolved in a polar solvent. The calculated value of the quantity and efficiency found that it increases with ratio doping , and after less than quantity when you reduce the efficiency ratio doping anthracene molecule by molecule 2-methyl naphthalene. Used a diluted concentration to the purpose of minimizing the phenomenon of self-absorption, Calculated the value of the quantity in relation to efficiency anthracene compound dissolved Daye methyl Slfoxayd, the amount of efficiency (qfm=0.32). As a composite record wavelength irritant λex = 365 nm at room temperature. It turns out from this study the presence of my energies activation molecule anthracene doping different proportions of molecule 2 - methyl naphthalene and each activation energy mechanical connecting different which could be interpreted by relying on the theory of packets semiconductor and which proposes a transition charge carriers from the Fermi donor to the packet delivery in the semiconductor negative (n-type) At high temperatures by thermal Excitation.","PeriodicalId":448231,"journal":{"name":"International Review of Physics","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115538876","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Predictive Value of Laser Doppler Flowmetry Monitoring for Diagnostic of Diabetic Patients and Healthy Control 激光多普勒血流监测对糖尿病患者诊断及健康对照的预测价值

International Review of Physics Pub Date : 2013-08-31 DOI: 10.15866/IREPHY.V7I4.4441

M. Abud, A. Salih, A. Shukur

{"title":"The Predictive Value of Laser Doppler Flowmetry Monitoring for Diagnostic of Diabetic Patients and Healthy Control","authors":"M. Abud, A. Salih, A. Shukur","doi":"10.15866/IREPHY.V7I4.4441","DOIUrl":"https://doi.org/10.15866/IREPHY.V7I4.4441","url":null,"abstract":"Compare the microcirculatory velocity distribution in the model diabetes patients, with smoker subjects and non-smokers clinically normal. the blood flow was assessed in 57 DM patients, 19 smoker and 48 clinically normal subjects using a new velocity-resolved quantitative laser Doppler flowmetry technique. The LDF estimates red blood cell (RBC) perfusion in (nm/ml.s), separated into two velocity regions, v 1 mm/s. This study aims to evaluate a method using 785nm diode laser based engineering approach to measure average velocity, CRBC, and perfusion. Distinguish according method between subjects and patients would able LDF noninvasively technique with absence of pain and exposure to biological sharp object especially DM patients. Result the optimum cut –off for perfusion is <3.75nm/ml.s is associated with a test sensitivity of 71.9% and specificity of 93.8%. It this cut off value the test is able to classify subjects into cases with DM and healthy non-smokers with 81.9% accuracy. Test in position in this cut-off value (<0.008 mm/s) or 8 µm/s will establish the diagnosis of DM with PPV 92% pretest probability of having DM is 50% at high accuracy. The same positive test result will establish a diagnosis of DM with 99% confidence in a clinical context when DM (or tissue ischemia) has a high pretest probability (10%) based on clinical judgment. At the other extreme of test, the cut –off value with highest sensitivity (100%) was < 10.91nm/s) will excluded a diagnostic of DM (or tissue ischemia) with 100% confidence (NPV=100%).","PeriodicalId":448231,"journal":{"name":"International Review of Physics","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121548119","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0