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Sreedevi, Aswathy,Quereshi, Mariya Amin,Kurian, Beteena,Kamalamma, Leelamoni Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.5
Background: In India, breast cancer is the leading malignancy among women in a majority of the cancer registries. Therefore it is important to understand screening practices and its predictors, including in rural areas with high female literacy and good health indices. Materials and Methods: A cross-sectional study with multistage sampling was conducted in Vypin Block, Ernakulam district, Kerala, India. Four Panchayats (self administration units) were randomly chosen and a woman in every second household was invited to participate from the tenth ward of each. Thus a total of 809 women were interviewed. Results: The majority of the repondents (82.1%) were not aware of risk factors and about a third (37.9%) were not aware of symptoms of breast cancer. About half of the population studied (46.6%) had undergone screening. Age (35-50 years), being married, health professionals as source of information and working were significant predictors of screening. Logistic regression showed that older women (35-50 yrs) were more likely to practice screening. Out of the never screened, about a third (35%) were desirous of doing it, but had not for various reasons and 53.5% were not willing to screen. The reasons identified for not screening among those desirous of doing it were grouped into knowledge 66 (43.4%), resources 23 (15.1%) and psychosocial 32(21.1%) factors. Unmarried women were significantly more likely to express factors related to all the three domains. Conclusions: This study showed that in spite of the absence of a population-based screening program, about half of the study population had undergone some type of screening. The older women (35-50 years) in particular were significantly more likely to practice screening. At this critical juncture, a high quality breast cancer awareness and screening initiative can help to consolidate the gains and tackle knowledge, resource and psychosocial barriers.
Goodness of fit test for uniform distribution with censored observation
Sreedevi E. P.,Kattumannil Sudheesh K. 한국통계학회 2023 Journal of the Korean Statistical Society Vol.52 No.2
We develop new goodness of fit test for uniform distribution based on a conditional moment characterization. We study the asymptotic properties of the proposed test statistic. We also present a goodness of fit test for uniform distribution to incorpo-rate the right censored observations and studied its properties. A Monte Carlo simu-lation study is carried out to evaluate the finite sample performance of the proposed tests. We illustrate the test procedures using real data sets.
Chemically synthesized Ag-doped SnS films for PV applications
Gedi, Sreedevi,Minnam Reddy, Vasudeva Reddy,Reddy Kotte, Tulasi Ramakrishna,Kim, Soo-Hyun,Jeon, Chan-Wook Elsevier 2016 CERAMICS INTERNATIONAL Vol.42 No.16
<P><B>Abstract</B></P> <P>The present paper reports chemically synthesized silver (Ag)-doped SnS absorbers (0–15at%) with tunable opto-electrical properties. The deposide films exhibited a polycrystalline nature and the crystallinity was improved with Ag-doping concentration upto 9at%. The optical band gap of the films was varied in the range, 1.31–1.26eV. The electrical resistivity of the films decreased significantly and the carrier concentration was improved by the Ag-doping concentration. Therefore, the SnS films grown with a 9at% Ag-doping concentration exhibited a very low electrical resistivity of 6Ω-cm and a carrier concentration of 1.2×10<SUP>16</SUP> cm<SUP>−3</SUP> with an optical energy band gap of 1.26eV due to the interstitial inclusion of Ag-atoms, which are suitable for the fabrication of eco-friendly, low cost, reliable, and highly efficient thin film solar cells.</P>
Impact of high temperature and short period annealing on SnS films deposited by E-beam evaporation
Gedi, Sreedevi,Reddy, Vasudeva Reddy Minnam,Kang, Jeong-yoon,Jeon, Chan-Wook Elsevier 2017 APPLIED SURFACE SCIENCE - Vol.402 No.-
<P><B>Abstract</B></P> <P>Thin films of SnS were deposited on Mo-substrate using electron beam evaporation at room temperature. As-deposited SnS films were annealed at a constant high temperaure of 860K for different short period of times, 1min, 3min, and 5min. The impact of heat treatment period on the physical properties of SnS films was investigated using appropriate characterization tools. XRD analysis revealed that the films were highly oriented along (111) plane with orthorhombic crystal structure. Surface morphology of as-deposited SnS films showed an identical leaf texture where as the annealed films showed large orthorombic slab shape grains in adidition to the leaf shape grains, which indicates the significance of short period annealing at high temperature. The transmission electron microscopy confirmed that those large orthorombic slabs had single-crystalline nature. The results emphasized that the short period annealing treatment at high temperature stimulated the growth of film towards the single crystallinity.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Preparation SnS films using electron beam evaporation at room temperature. </LI> <LI> SnS films were annealed at a high temperaure for different short period of times. </LI> <LI> The films showed highly oriented (111) planes with orthorhombic crystal structure. </LI> <LI> Surface morphology showed bigger and faceted grains embedded in orthorombic. </LI> <LI> The TEM confirmed that big orthorombic slabs had single-crystalline nature. </LI> </UL> </P>
Influence of deposition temperature on the efficiency of SnS solar cells
Gedi, Sreedevi,Minnam Reddy, Vasudeva Reddy,Alhammadi, Salh,Reddy Guddeti, Phaneendra,Kotte, Tulasi Ramakrishna Reddy,Park, Chinho,Kim, Woo Kyoung Elsevier Science B.V., Amsterdam. 2019 SOLAR ENERGY -PHOENIX ARIZONA THEN NEW YORK- Vol.184 No.-
<P><B>Abstract</B></P> <P>In this paper, studies on the photovoltaic performance of the orthorhombic SnS device with respect to bath temperature are reported. Firstly, the effect of bath temperature on the physical properties of SnS layers was analyzed using appropriate characterization techniques. The deposited films exhibited an orthorhombic crystal structure with an intense (1 1 1) reflection of SnS. The band gap of 1.3 eV for good solar radiation absorption and a minimum value of electrical resistivity of 38 Ω-cm for easy carrier transport were obtained at 70 °C. In addition, the films had compact morphology with uniformly distributed large grains of approximately 220 nm. Finally, the optimal SnS absorber exhibited a high efficiency of 0.94%. This work gives a new insight into the efficient deposition of SnS solar absorbers with low material wastage and low environmental pollution.</P> <P><B>Highlights</B></P> <P> <UL> <LI> SnS films prepared by cost effective technique CBD. </LI> <LI> Bath temperature was optimized for PV absorber. </LI> <LI> Single phase orthorhombic SnS films with good morphology were prepared. </LI> <LI> SnS solar cell showed a conversion efficiency of 0.94%. </LI> <LI> The efficiency of present device is higher than reported CBD SnS (Orthorhombic)-devices. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>