Pub Date : 2017-10-01DOI: 10.5958/2454-762X.2017.00022.1
Sungmo Park, Geonu Park, An Ilsin
We developed a micro-spot spectroscopic ellipsometer using reflective objective, which has twomirrored Schwarzschild configuration. Using only small portion of numerical aperture and selecting off-axis illumination, we achieved spotsize of 60 micrometer in diameter. As the object is composed of mirrors, chromatic abberation was not a concern but reflection from mirrors caused polarization errors. We show details of the system including the effects of polarization errors.
{"title":"Development of micro-spot spectroscopic ellipsometer using reflective objectives","authors":"Sungmo Park, Geonu Park, An Ilsin","doi":"10.5958/2454-762X.2017.00022.1","DOIUrl":"https://doi.org/10.5958/2454-762X.2017.00022.1","url":null,"abstract":"We developed a micro-spot spectroscopic ellipsometer using reflective objective, which has twomirrored Schwarzschild configuration. Using only small portion of numerical aperture and selecting off-axis illumination, we achieved spotsize of 60 micrometer in diameter. As the object is composed of mirrors, chromatic abberation was not a concern but reflection from mirrors caused polarization errors. We show details of the system including the effects of polarization errors.","PeriodicalId":14491,"journal":{"name":"Invertis Journal of Science & Technology","volume":"41 3 1","pages":"142-147"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86375217","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}
Pub Date : 2017-06-01DOI: 10.5958/2454-762X.2017.00009.9
Dimpalkumar Shah, S. Vyas, G. R. Pandya, M. Jani, K. R. Shah
A simple relation has been evolved for the analytical evaluation of indenter orientation dependent variables in Brooke's formula for the effective resolved shear stress (ERSS) on a slip system of a crystal produced by a hardness indenter. Its merits over the stereographic method are considered. In association with this the hardness anisotropy of InBi 1-x Se x and InBi 1-x Sb x single crystals has been studied and the analysis shows that minimum values of hardness are obtained. The rotation of indenter with respect to its initial setting with maximum values in between them and the results are discussed in details.
对于由硬度压头产生的晶体滑移系统上的有效分解剪切应力(ERSS)的布鲁克公式中压头取向依赖变量的分析评价，已经发展出一个简单的关系。考虑了其相对于立体法的优点。在此基础上研究了InBi 1-x Se x和InBi 1-x Sb x单晶的硬度各向异性，分析表明得到了硬度的最小值。详细讨论了压头相对于其初始设置的旋转以及它们之间的最大值和结果。
{"title":"An Analytical Method of Evolution of ERSS on Slip System and Hardness Anisotropy of InBi 1-x Sb x and InBi 1-x Se x","authors":"Dimpalkumar Shah, S. Vyas, G. R. Pandya, M. Jani, K. R. Shah","doi":"10.5958/2454-762X.2017.00009.9","DOIUrl":"https://doi.org/10.5958/2454-762X.2017.00009.9","url":null,"abstract":"A simple relation has been evolved for the analytical evaluation of indenter orientation dependent variables in Brooke's formula for the effective resolved shear stress (ERSS) on a slip system of a crystal produced by a hardness indenter. Its merits over the stereographic method are considered. In association with this the hardness anisotropy of InBi 1-x Se x and InBi 1-x Sb x single crystals has been studied and the analysis shows that minimum values of hardness are obtained. The rotation of indenter with respect to its initial setting with maximum values in between them and the results are discussed in details.","PeriodicalId":14491,"journal":{"name":"Invertis Journal of Science & Technology","volume":"10 1","pages":"59-63"},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81675376","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}
Pub Date : 2017-06-01DOI: 10.5958/2454-762X.2017.00014.2
Sarman Singh, N. Mehrotra, L. Singh, Akhil Agarwal, J. Verma
To assess the frequency and to identify the predisposing factors for ocular surface disorders in ICU patients. Prospective observational study of all patients admitted to the ICU complex of SRMSIMS between1st January to 31 st April 2016 for a minimum period of 5 days. Patients will be observed for abnormalities of the lid , conjunctiva, cornea and tear film by diffuse illumination aided by Schirmer's Test, corneal and conjunctival staining and conjunctival swab when required. Other factors like consciousness, use of a ventilator, preexisting comorbidities shall also be noted. Patients will be observed on Day1, 5, 6, and so on. 60 eyes of 30 patients were examined . In mechanically ventilated patients , 36 eyes (60%) had conjunctival hyperemia which resolved upon intervention which included antibiotics and lubricants . 18 eyes (9%) had conjunctival discharge which resolved upon intervention. 12 eyes (20%) were stain positive. The critically ill often develop ocular surface disorders, especially when sedated and immobilized. A close relationship was observed between these conditions and the inability to close one's eyes. The presence of ocular surface disease was closely correlated with the degree of lagophthalmos, which in turn was closely related to the depth of sedation or paralysis.
{"title":"Ocular surface disorders in patients admitted in intensive care unit of a tertiary care hospital","authors":"Sarman Singh, N. Mehrotra, L. Singh, Akhil Agarwal, J. Verma","doi":"10.5958/2454-762X.2017.00014.2","DOIUrl":"https://doi.org/10.5958/2454-762X.2017.00014.2","url":null,"abstract":"To assess the frequency and to identify the predisposing factors for ocular surface disorders in ICU patients. Prospective observational study of all patients admitted to the ICU complex of SRMSIMS between1st January to 31 st April 2016 for a minimum period of 5 days. Patients will be observed for abnormalities of the lid , conjunctiva, cornea and tear film by diffuse illumination aided by Schirmer's Test, corneal and conjunctival staining and conjunctival swab when required. Other factors like consciousness, use of a ventilator, preexisting comorbidities shall also be noted. Patients will be observed on Day1, 5, 6, and so on. 60 eyes of 30 patients were examined . In mechanically ventilated patients , 36 eyes (60%) had conjunctival hyperemia which resolved upon intervention which included antibiotics and lubricants . 18 eyes (9%) had conjunctival discharge which resolved upon intervention. 12 eyes (20%) were stain positive. The critically ill often develop ocular surface disorders, especially when sedated and immobilized. A close relationship was observed between these conditions and the inability to close one's eyes. The presence of ocular surface disease was closely correlated with the degree of lagophthalmos, which in turn was closely related to the depth of sedation or paralysis.","PeriodicalId":14491,"journal":{"name":"Invertis Journal of Science & Technology","volume":"18 1","pages":"93-97"},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91061627","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}
Pub Date : 2017-06-01DOI: 10.5958/2454-762X.2017.00016.6
K. Rathod, I. Patel, C. F. Desai, H. Desai
Zinc tris-Thiourea sulfate (ZTS) is one of the notable semi organic non linear optical crystals. In the present investigation 0.01N Ammonium Molybdate doped ZTS crystal was grownusing single diffusion gel growthtechnique which has an advantage over normally employed solution growth method, in terms of controlled nucleation and hence better perfection. A significant morphological alteration was observed due to doping. The functional groups of pure and doped ZTS crystals were recorded and identified using Fourier Transform Infrared Spectroscopic (FTIR) analysis. A study on hardness variation due to doping was conducted using Vickers' Hardness Tests. The increase in hardness observed can be assigned to the impurity hardening effect as found to increased due to effect of dopant. The results obtained are elaborated and discussed in the paper.
{"title":"The Effect of Ammonium Molybdate on Mechanical Property of Zinc (tris) Thiourea Sulfate (ZTS) Crystal:A Novel NLO Crystal","authors":"K. Rathod, I. Patel, C. F. Desai, H. Desai","doi":"10.5958/2454-762X.2017.00016.6","DOIUrl":"https://doi.org/10.5958/2454-762X.2017.00016.6","url":null,"abstract":"Zinc tris-Thiourea sulfate (ZTS) is one of the notable semi organic non linear optical crystals. In the present investigation 0.01N Ammonium Molybdate doped ZTS crystal was grownusing single diffusion gel growthtechnique which has an advantage over normally employed solution growth method, in terms of controlled nucleation and hence better perfection. A significant morphological alteration was observed due to doping. The functional groups of pure and doped ZTS crystals were recorded and identified using Fourier Transform Infrared Spectroscopic (FTIR) analysis. A study on hardness variation due to doping was conducted using Vickers' Hardness Tests. The increase in hardness observed can be assigned to the impurity hardening effect as found to increased due to effect of dopant. The results obtained are elaborated and discussed in the paper.","PeriodicalId":14491,"journal":{"name":"Invertis Journal of Science & Technology","volume":"66 1","pages":"104-110"},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81530773","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}
Pub Date : 2017-06-01DOI: 10.5958/2454-762X.2017.00012.9
P. Joge, D. Kanchan, Poonam Sharma, Manish S Jayswal, D. Awasthi
The blend specimens of [PVA (47) -PEO (47) -EC (6) -(LiCF 3 SO 3 )x] system are prepared for x = 3 to 11 wt % using solution cast technique. Portions of these blend films are exposed to swift heavy O 7+ ion radiations. Changes taking place in thermal, electrical and relaxation properties at various LiCF 3 SO 3 salt concentrations of all the blend specimens prior and after irradiation are thoroughly investigated. Relaxation time τ and Kohlrausch-William-Watt's exponent β which throw light on the relaxation dynamics of the blend samples are calculated using modulus formalism. For both, prior as well as after irradiation, all these properties are found to be optimum at 9 wt% of salt concentration. However, irradiation has led to a significant enhancement in these properties of the blends at all salt concentrations. Scaling of modulus is carried out to analyse time-composition superposition principle. Relaxation dynamics is observed to be independent of salt concentration in cases of both, pristine and irradiated blends.
{"title":"The Consequence of LiCF 3 SO 3 Concentrations and Swift Heavy O 7+ Ion Irradiation on Thermal, Electrical and Relaxation Properties of [PVA (47) -PEO (47) -EC (6) - LiCF 3 SO 3 (x)] Blend Electrolyte System","authors":"P. Joge, D. Kanchan, Poonam Sharma, Manish S Jayswal, D. Awasthi","doi":"10.5958/2454-762X.2017.00012.9","DOIUrl":"https://doi.org/10.5958/2454-762X.2017.00012.9","url":null,"abstract":"The blend specimens of [PVA (47) -PEO (47) -EC (6) -(LiCF 3 SO 3 )x] system are prepared for x = 3 to 11 wt % using solution cast technique. Portions of these blend films are exposed to swift heavy O 7+ ion radiations. Changes taking place in thermal, electrical and relaxation properties at various LiCF 3 SO 3 salt concentrations of all the blend specimens prior and after irradiation are thoroughly investigated. Relaxation time τ and Kohlrausch-William-Watt's exponent β which throw light on the relaxation dynamics of the blend samples are calculated using modulus formalism. For both, prior as well as after irradiation, all these properties are found to be optimum at 9 wt% of salt concentration. However, irradiation has led to a significant enhancement in these properties of the blends at all salt concentrations. Scaling of modulus is carried out to analyse time-composition superposition principle. Relaxation dynamics is observed to be independent of salt concentration in cases of both, pristine and irradiated blends.","PeriodicalId":14491,"journal":{"name":"Invertis Journal of Science & Technology","volume":"74 1","pages":"77-85"},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73279808","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}
Pub Date : 2017-06-01DOI: 10.5958/2454-762X.2017.00013.0
P. Desai, D. Patel, A. R. Jani
The thermal behavior of some mixed transition metal dichalcogenides Cr x Mo 1-x Se 2 (x=0.25, 0.50, 0.75) were investigated using different thermal techniques. These include thermogravimetry (TGA), derivative thermogravimetry (DTG) and differential thermal analysis (DTA). The thermogravimetry data allowed the determination of activation energy and frequency factor. The relative thermal stabilities of the studied compounds have been evaluates in terms of composition (x) and follow the order 0.25>0.50>0.75. The DTA pattern shows a strong endothermic transition around 550K. The different kinetic parameters: entropy, enthalpy and Gibbs free energy were evaluated using Piloyan-Novikova and Coats-Redfern relations.
采用不同的热技术研究了混合过渡金属二硫族化合物Cr x Mo 1-x Se 2 (x=0.25, 0.50, 0.75)的热行为。这些方法包括热重法(TGA)、衍生热重法(DTG)和差热分析(DTA)。热重数据可以确定活化能和频率因子。所研究化合物的相对热稳定性已根据组成(x)进行了评估，并遵循0.25>0.50>0.75的顺序。DTA模式在550K左右表现出强烈的吸热转变。利用Piloyan-Novikova关系和Coats-Redfern关系计算了不同的动力学参数:熵、焓和吉布斯自由能。
{"title":"Thermal Decomposition Studies of Cr x Mo 1-x Se 2 (x=0.25, 0.50, 0.75) Single Crystals","authors":"P. Desai, D. Patel, A. R. Jani","doi":"10.5958/2454-762X.2017.00013.0","DOIUrl":"https://doi.org/10.5958/2454-762X.2017.00013.0","url":null,"abstract":"The thermal behavior of some mixed transition metal dichalcogenides Cr x Mo 1-x Se 2 (x=0.25, 0.50, 0.75) were investigated using different thermal techniques. These include thermogravimetry (TGA), derivative thermogravimetry (DTG) and differential thermal analysis (DTA). The thermogravimetry data allowed the determination of activation energy and frequency factor. The relative thermal stabilities of the studied compounds have been evaluates in terms of composition (x) and follow the order 0.25>0.50>0.75. The DTA pattern shows a strong endothermic transition around 550K. The different kinetic parameters: entropy, enthalpy and Gibbs free energy were evaluated using Piloyan-Novikova and Coats-Redfern relations.","PeriodicalId":14491,"journal":{"name":"Invertis Journal of Science & Technology","volume":"27 1","pages":"86-92"},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85598804","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}
Pub Date : 2017-01-01DOI: 10.5958/2454-762X.2017.00017.8
M. K. Bhowal, T. D. Das
We report on the growth of InPBi and GaSbBi epitaxial layers by liquid phase epitaxy. Photoluminescence measurements showed a bandgap reduction of 55 meV for InPBi and 24 meV for GaSbBi due to the incorporation of Bi in the III-V lattice.
{"title":"Bandgap reduction of InP and GaSb epitaxial layers containing Bi","authors":"M. K. Bhowal, T. D. Das","doi":"10.5958/2454-762X.2017.00017.8","DOIUrl":"https://doi.org/10.5958/2454-762X.2017.00017.8","url":null,"abstract":"We report on the growth of InPBi and GaSbBi epitaxial layers by liquid phase epitaxy. Photoluminescence measurements showed a bandgap reduction of 55 meV for InPBi and 24 meV for GaSbBi due to the incorporation of Bi in the III-V lattice.","PeriodicalId":14491,"journal":{"name":"Invertis Journal of Science & Technology","volume":"12 1","pages":"113-117"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73339602","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}
Pub Date : 2017-01-01DOI: 10.5958/2454-762X.2017.00030.0
G. Jha, Sarita Jha
{"title":"Role of Saturn's oblateness and secular resonance of various combination of inner satellites with Titan on Mimas-Tethys system","authors":"G. Jha, Sarita Jha","doi":"10.5958/2454-762X.2017.00030.0","DOIUrl":"https://doi.org/10.5958/2454-762X.2017.00030.0","url":null,"abstract":"","PeriodicalId":14491,"journal":{"name":"Invertis Journal of Science & Technology","volume":"123 1","pages":"183"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85683202","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}
Pub Date : 2017-01-01DOI: 10.5958/2454-762X.2017.00010.5
N. Barot, B. Bishnoi, S. Jahan, P. K. Mehta, N. Singh
Polymer-Ceramic composite films of Polyvinyl alcohol (PVA) and Sr(Co1/3Nb2/3)O3 (SCN) as filler, were prepared by solution casting technique. The structure and microstructure of the samples has been characterized using X-ray diffraction, infrared spectroscopy (Fourier transformed infrared spectroscopy) and Scanning electron microscopy (SEM). Thermal properties of the samples are studied by means of Differential Scanning Calorimetry (DSC) revealed that the glass transition temperature increases for the composites [PVA + 10% SCN (Tg = 109°C)] compared to pure PVA (Tg = 97°C) samples. The dielectric characterization has been studied by means of impedance gain-phase analyzer. It is concluded that addition of 50% SCN lead to significant advantage on the dielectric properties of Polyvinyl alcohol polymers. Observed changes in the dielectric dispersion at high temperatures are essentially linked to the glass transition temperature (Tg) rather than due to lattice based dielectric dispersion.
{"title":"Structure, microstructure and dielectric studies of PVA/Sr(Co1/3Nb2/3)O3 polymer composites","authors":"N. Barot, B. Bishnoi, S. Jahan, P. K. Mehta, N. Singh","doi":"10.5958/2454-762X.2017.00010.5","DOIUrl":"https://doi.org/10.5958/2454-762X.2017.00010.5","url":null,"abstract":"Polymer-Ceramic composite films of Polyvinyl alcohol (PVA) and Sr(Co1/3Nb2/3)O3 (SCN) as filler, were prepared by solution casting technique. The structure and microstructure of the samples has been characterized using X-ray diffraction, infrared spectroscopy (Fourier transformed infrared spectroscopy) and Scanning electron microscopy (SEM). Thermal properties of the samples are studied by means of Differential Scanning Calorimetry (DSC) revealed that the glass transition temperature increases for the composites [PVA + 10% SCN (Tg = 109°C)] compared to pure PVA (Tg = 97°C) samples. The dielectric characterization has been studied by means of impedance gain-phase analyzer. It is concluded that addition of 50% SCN lead to significant advantage on the dielectric properties of Polyvinyl alcohol polymers. Observed changes in the dielectric dispersion at high temperatures are essentially linked to the glass transition temperature (Tg) rather than due to lattice based dielectric dispersion.","PeriodicalId":14491,"journal":{"name":"Invertis Journal of Science & Technology","volume":"8 1","pages":"64-72"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76932544","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}
Pub Date : 2017-01-01DOI: 10.5958/2454-762X.2017.00021.X
S. Mukherjee, T. Maitra, A. Nayak, A. Pradhan, M. Mukhopadhyay, S. Bhunia
{"title":"Interface characteristics of ZnSnP2/Si heterostructure studied by x-ray reflectivity measurement","authors":"S. Mukherjee, T. Maitra, A. Nayak, A. Pradhan, M. Mukhopadhyay, S. Bhunia","doi":"10.5958/2454-762X.2017.00021.X","DOIUrl":"https://doi.org/10.5958/2454-762X.2017.00021.X","url":null,"abstract":"","PeriodicalId":14491,"journal":{"name":"Invertis Journal of Science & Technology","volume":"12 1","pages":"137"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86140517","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}
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