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| 1 | Measurement of Plasma Parameters of Calcium and Silicon in a Rock Sample Using Laser Induced Breakdown Spectroscopy显示文摘Laser Induced Breakdown Spectroscopic(LIBS)technique was used to detect calcium and silicon in an unknown sample.In this method plasma was generated by Nd∶YAG laser of wavelength 1 064 nm with energy 400 mJ and pulse duration between 5~10ns.The method was applied for the qualitative as well as quantitative analysis.In the qualitative analysis,the electron number density(Ne)of plasma containing calcium and silicon is determined showing that Neof neutral particles is equivalent to 1016(cm-3)whereas for ionized particles it is 1017(cm-3).Plasma temperature is measured using Boltzmann plot method which must be greater than 10 000 k.Intensity ratio method is used for the quantitative analysis shows various elements in abundance with calcium and silicon in majority. | Uzma G M.Junaid Khalid Alamgir T Samina | 2017 | 光谱学与光谱分析2017，37，10： | 4 |
| 2 | Effect of high power diode laser surface melting on wear resistance of magnesium alloys显示文摘 | Li Bin Uzma G | 2006 | Wear2006，260，12： | 1 |
| 3 | Structural analysis of the Mn-Zn ferrites using XRD technique显示文摘 | Uzma Ghazanfar Siddiqi S A Abbas G | 2005 | Mater Sci Eng B2005，118，： | 1 |
| 4 | Practice patterns in FNA technique: A survey analysis显示文摘AIM: To ascertain fine needle aspiration(FNA) tech-niques by endosonographers with varying levels of ex-perience and environments.METHODS: A survey study was performed on United States based endosonographers. The subjects complet-ed an anonymous online electronic survey. The main outcome measurements were differences in needle choice, FNA technique, and clinical decision making among endosonographers and how this relates to years in practice, volume of EUS-FNA procedures, and prac-tice environment.RESULTS: A total of 210(30.8%) endosonographers completed the survey. Just over half(51.4%) identified themselves as academic/university-based practitioners. The vast majority of respondents(77.1%) identified themselves as high-volume endoscopic ultrasound(EUS)(> 150 EUS/year) and high-volume FNA(> 75 FNA/year) performers(73.3). If final cytology is non-diagnostic, high-volume EUS physicians were more likely than low volume physicians to repeat FNA with a core needle(60.5% vs 31.2%; P = 0.0004), and low volume physicians were more likely to refer patients for either surgical or percutaneous biopsy,(33.4% vs 4.9%, P < 0.0001). Academic physicians were more likely to repeat FNA with a core needle(66.7%) compared to community physicians(40.2%, P < 0.001). CONCLUSION: There is significant variation in EUS-FNA practices among United States endosonographers. Differences appear to be related to EUS volume and practice environment. | Christopher J DiMaio Jonathan M Buscaglia Seth A Gross Harry R Aslanian Adam J Goodman Sammy Ho Michelle K Kim Shireen Pais Felice Schnoll-Sussman Amrita Sethi Uzma D Siddiqui David H Robbins Douglas G Adler Satish Nagula | 2014 | World Journal of Gastrointestinal Endoscopy2014，6，10： | 0 |
| 5 | Dielectric behavior of Cu-Zn ferrites with Si additive显示文摘Since ferrites are highly sensitive to the additives present in or added to them, extensive work, to improve the properties of basic ferrites, has been carried out on these aspects. The present paper reports the effects of composition, frequency,and temperature on the dielectric behavior of a series of CuxZn1-xFe2O4 ferrite samples prepared by the usual ceramic technique. In order to improve the properties of the samples, low cost Fe2O3having 0.5 wt.% Si as an additive is selected to introduce into the system. The dielectric constant increases by increasing the Cu content, as the electron exchange of Cu2+<=> Cu+is responsible for the conduction and the polarization. However, the addition of Si could decrease the dielectric constant as it suppresses the ceramic grain growth and promotes the quality factor at higher frequencies.Dielectric constant ε and loss tangent tan δ of the mixed Cu–Zn ferrite decrease with increasing frequency, attributed to the Maxwell–Wagner polarization, which increases as the temperature increases. | Uzma G | 2014 | Chinese Physics B2014，23，5： | 0 |
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