PhD student

Engineering, Italy

PhD student

Engineering, Italy
Time filter
Source Type

This study focuses on the probabilistic estimation of monthly soil moisture variation by considering (a) the influence of hydrometeorological forcing to model the temporal variation and (b) the information of Hydrological Soil Groups (HSGs) and Agro-Climatic Zones (ACZs) to capture the spatial variation. The innovative contributions of this study are: (i) development of a Combined Hydro-Meteorological (CHM) index to extract the information of different influencing hydrometeorological variables, (ii) consideration of soil-hydrologic characteristics (through HSGs) and climate regime-based zoning for agriculture (through ACZs), and (iii) quantification of uncertainty range of the estimated soil moisture. Usage of Supervised Principal Component Analysis (SPCA) in the development of the CHM index helps to eliminate the "curse of dimensionality," typically arises in the multivariate analysis. The usage of SPCA also ensures the maximum possible association between the developed CHM index and soil moisture variation. The association between these variables is modeled through their joint distribution which is obtained by using the theory of copula. The proposed approach is also spatially transferable, since the information on HSGs and ACZs is considered. The "leave-one-out" cross-validation (LOO-CV) approach is adopted for stations belong to a particular HSG to examine the spatial transferability. The simulated soil moisture values are also compared with a few existing soil moisture data sets, derived from different Land Surface Models (LSMs) or retrieved from different satellite-based missions. The potential of the proposed approach is found to be promising and even applicable to crop land also, though with a lesser degree of efficiency as compared to bare land conditions. © 2015. American Geophysical Union.

PubMed | Graduate Student, Rey Juan Carlos University, University of Sao Paulo and PhD Student
Type: Comparative Study | Journal: Journal of manipulative and physiological therapeutics | Year: 2014

The purpose of this study was to evaluate neck pain-related disability and cervical range of motion (CROM) in patients with episodic migraine (EM) and chronic migraine (CM) and to examine the correlation of both outcomes.This cross-sectional study consisted of 91 patients with EM and 34 with CM. Cervical range of motion was measured with the CROM device, and pain during the cervical movement was recorded. Self-reported disability related to neck pain was assessed with the Neck Disability Index.Patients with CM showed higher Neck Disability Index scores and more moderate and severe disability (P = .01). Severe disability as a result of neck pain was associated with 7.6-fold risk of developing CM (P = .003). No significant differences in CROM were identified between groups. Moderate negative correlations between CROM and disability were found for 4 motions within the CM group (-0.60

PubMed | Andhra Medical College, PhD Student, MAMC & Associated Lok Nayak Hospital and Andhra University
Type: Journal Article | Journal: Journal of clinical and diagnostic research : JCDR | Year: 2014

Interleukin-18 (IL-18) is a pro inflammatory cytokine which plays a key role in the acute and chronic inflammatory phases of Rheumatoid Arthritis (RA). The Single Nucleotide Polymorphisms (SNPs) of IL-18 gene promoter region at positions -137 and -607, are postulated to be associated with RA. To test this, this study aimed to identify the association between these SNPs of the IL-18 gene promoter region of RA in south Indian patients.This study was carried on 190 subjects among which 90 were RA patients and 100 were age and sex matched controls. Genomic DNA was extracted by Salting out method. IL 18 gene promotor region SNPs, IL 18 - 607 and IL 18 -137 were amplified by using sequence specific primers. The amplified products of different samples were separated by using a 1.5% agarose gel, stained with ethidium bromide and photographed. All statistical analyses were carried out by using SYSTAT 12 software.At position 607, the frequencies of C allele, CC genotype, A allele and AA genotype were found to be significantly higher in patients and controls respectively and there was no significant difference in CA genotype. At position 137, there was no significant difference between the two groups with regard to G and C allelles but there was a significant increase in GG genotype of patients and CC genotype of controls. There was no association between duration of morning stiffness, rheumatoid factor positivity or negativity, age of onset and gender with distribution of genotypes and alleles.C allele, CC genotype at position-607 and GG genotype at position-137 are risk factors and A allele, AA genotype at position-607 and CC genotype at position-137 have protective effect for RA.

PubMed | University Utrecht, Netherlands Institute for Health Services Research and PhD Student.
Type: Journal Article | Journal: Obstetrical & gynecological survey | Year: 2016

Preconception care (PCC) has the potential to optimize pregnancy outcomes. However, awareness of PCC among the target population is generally limited, and the use of PCC remains low.The objective of this study was to review the literature on womens perceptions regarding barriers and facilitators for the use of PCC.A systematic search was conducted in MEDLINE, Embase, CINAHL, and PsycINFO for published studies until February 2015. Original qualitative and quantitative peer-reviewed studies from Western countries in English, holding womens perceptions regarding barriers and facilitators for the use of PCC. Data extraction and analysis were performed using NVivo version 10 software. A coding frame was derived from the findings and applied by 2 authors. Thematic analysis was used to identify key topics and themes.Twenty-one good-quality articles were included, of which 10 qualitative and 11 quantitative studies. Seven main themes were identified: preconditions, emotions and beliefs, perceived need, knowledge and experience, social structure, accessibility, and provider characteristics. Not (fully) planning pregnancy, perceived absence of risks, lack of awareness, and pregnancy experiences were the most frequently identified barriers and believing in the benefits and availability of PCC the most frequently identified facilitators for PCC use.Women perceive more barriers than facilitators related to PCC uptake, which explains why the use of PCC remains low. Our results provide a starting point to refocus interventions and strategies, aiming on enlarging the awareness, perceived importance, and accessibility of PCC to improve its uptake.

Villani G.,PhD student | Tomei F.,PhD student | Tomozeiu R.,PhD student | Marletto V.,PhD student
Italian Journal of Agrometeorology | Year: 2011

We produced downscaled climatic projections (based on A1B Ipcc emission scenario) for six Italian study areas, in the framework of the Italian Agroscenari research project. The projections were analyzed in term of their impact on irrigation demand for fruit and horticultural crops in the study area of Faenza, devoted to specialized fruit cropping, and located in the Romagna sub-region, northern Italy. The climate change impacts for the period 2021-2050 on crop irrigation water needs were assessed by means of the Criteria water balance model, in the two versions available, Criteria BdP (local) and Geo (spatial) with different levels of detail. We found in general an irrigation demand increase of about +10% comparing the 2021-2050 period with the reference years 1961-1990, but no substantial differences with more recent years, i.e. 1991-2008, mainly due to a projected increase in spring precipitation compensating the projected higher summer temperature and evapotranspiration.

PubMed | PhD Student
Type: Case Reports | Journal: Obstetrical & gynecological survey | Year: 2013

Conjoined twins are rare. High-quality imaging techniques are essential for proper first-trimester diagnosis. Technological development leads to new imaging techniques such as 3-dimensional virtual embryoscopy. The aim of this review was to explore imaging techniques used in the first-trimester diagnosis of conjoined twins and provide a systematic diagnostic table for making this diagnosis.A PubMed literature search was performed using the terms ultrasound, Doppler, MRI, and CT combined with first-trimester and conjoined twins. Three recent cases at our department are reviewed and examined additionally using 3-dimensional virtual embryoscopy.The different types of conjoined twins are summarized in a table for practical use during ultrasound examination. In evaluating conjoined twins, 2-dimensional ultrasound is the criterion standard. Three-dimensional and Doppler ultrasounds add anatomical and prognostic information. Virtual embryoscopy imaging reveals additional findings in our 3 cases not seen with routine 2-dimensionalultrasound examination.Each case of conjoined twins is unique and should be evaluated with the best possible imaging techniques. Three-dimensional and Doppler ultrasound should be added to the systematic diagnostic evaluation of conjoined twins. Virtual embryoscopy imaging may contribute to earlier, more appropriate counseling and management of these pregnancies.

PubMed | PUC Minas, PhD Student and Piracicaba Dental School
Type: Journal Article | Journal: The journal of contemporary dental practice | Year: 2015

Some surface treatments performed on titanium can alter the composition of salivary pellicle formed on this abiotic surface. Such treatments modify the titaniums surface properties and can promote higher adsorption of proteins, which allow better integration of titanium to the biotic system.This study aimed to evaluate the interactions between salivary proteins and titanium disks with different surface treatments.Machined titanium disks (n = 48) were divided into four experimental groups (n = 12), according to their surface treatments: surface polishing (SP); acid etching (A); spot-blasting plus acid etching (SB-A); spot-blasting followed by acid etching and nano-functionalization (SB-A-NF). Titanium surfaces were characterized by surface roughness and scanning electron microscopy (SEM). Specimens were incubated with human saliva extracted from submandibular and sublingual glands. Total salivary protein adsorbed to titanium was quantified and samples were submitted to western blotting for mucin glycoprotein 2 (MG2) and lactoferrin identification.Surface roughness was statistically higher for SB-A and SB-A-NF groups. Scanning electron microscopy images confirmed that titanium surface treatments increased surface roughness with higher number of porous and scratches for SB-A and SB-A-NF groups. Total protein adsorption was significantly higher for SB-A and SB-A-NF groups (p < 0.05), which also presented higher interactions with MG2 and lactoferrin proteins.The roughing of titanium surface by spot-blasting plus acid etching treatments contribute to higher interaction with salivary proteins, such as MG2 and lactoferrin.Titanium surface roughing increases the interactions of the substratum with salivary proteins, which can influence the integration of dental implants and their components to the oral environment. However, those treatments should be used carefully intraorally, avoiding increase biofilm formation.

PubMed | São Paulo State University and PhD Student
Type: Comparative Study | Journal: The journal of contemporary dental practice | Year: 2015

The purpose of this study was to evaluate the effect of occlusal contact area for loading on the cuspal defection and stress distribution in a first premolar restored with a high elastic modulus restorative material.The Rhinoceros 4.0 software was used for modeling the three-dimensional geometries of dental and periodontal structures and the inlay restoration. Thus, two different models, intact and restored teeth with three occlusal contact areas, 0.1, 0.5 and 0.75 mm(2), on enamel at the occlusal surface of buccal and lingual cusps. Finite element analysis (FEA) was performed with the program ANSYS (Workbench 13.0), which generated a mesh with tetrahedral elements with greater refinement in the regions of interest, and was constrained at the bases of cortical and trabecular bone in all axis and loaded with 100 N normal to each contact area.To analysis of maximum principal stress, the smaller occlusal contact area showed greater compressive stress in region of load application for both the intact and inlay restored tooth. However, tensile stresses at the occlusal isthmus were similar for all three tested occlusal contact areas (60 MPa). To displacement of the cusps was higher for teeth with inlay (0.46-0.48 mm). For intact teeth, the smaller contact area showed greater displacement (0.10 mm). For teeth with inlays, the displacement of the cusps were similar in all types of occlusal area.Cuspal displacement was higher in the restored tooth when compared to the intact tooth, but there were no significant variations even with changes in the occlusal contact area. RELEVANCE CLINICAL: Occlusal contacts have a great influence on the positioning of teeth being able to maintain the position and stability of the mandible. Axial loads would be able to generate more uniform stress at the root presenting a greater concentration of load application in the point and the occlusal surface. Thus, is necessary to analyze the relationship between these occlusal contacts as dental wear and subsequent occlusal interferences.

PubMed | Professor and HOD, U.G Student and PhD Student
Type: Journal Article | Journal: Journal of clinical and diagnostic research : JCDR | Year: 2014

Obesity is a condition in which excess body fat accumulates, which leads to various adverse effects on health, particularly cardiovascular diseases (CVDs), which reduce life expectancy and/or increase health problems. Fast food consumption is one of the factors which have been reported as a cause of obesity. Body mass index (BMI) is used to assess obesity and overweight, which can be calculated by using the formula, weight in kg, divided by square of height in metres.This study focused on the relationship of body mass index with fast food consumption, associated soft drink consumption and physical activity.Descriptive cross-sectional study was conducted in Department of Biochemistry, SBKS MI and RC, and Sumandeep Vidyapeeth. This study was approved by the ethical review board .One hundred and forty seven medical students from 1(st) year MBBS course were included in this study. Self-structured questionnaire was used, which contained several data like information on age, height, weight, education level. The formula used for calculating BMI was, weight in kg, divided by square of height in metres (Kg/m(2)).In our study, out of 147 students, a total of 138 students (more than 90%) used to have fast food. Among these, a total of 47 students (34.05%) were pre-obese and obese. Out of 147 students, 87 students (59.18%) were in normal weight range, while 13 (8.84%) students were underweight.Data was compiled in an Excel worksheet and it was analyzed for percentages and proportions. Chi-square and Pearsons correlation test were also applied wherever they were applicable and Alpha error was set at a 5% level.In our study, a significant relationship was found between BMI and fast food consumption, less physical activity, and intake of soft drinks.

PubMed | Ph.D. Student and Additional Professor
Type: Journal Article | Journal: Journal of clinical and diagnostic research : JCDR | Year: 2014

Glycation is known to play a key role in complications of many pathophysiological processes. The present study was carried out to assess whether there are abnormalities of non-enzymatic glycation of proteins and hemoglobin in acute Myocardial Infarction (MI) patients.Eighteen acute Myocardial Infarction (MI) patients and 20 healthy controls were enrolled for the present study. Fasting plasma glucose, fructosamine, glycated hemoglobin were evaluated.A significant rise in the mean values of fructosamine and glycated hemoglobin was found in acute myocardial patients when compared with controls. When Pearsons correlation analysis was performed, no significant correlation was found between fasting plasma glucose with either fructosamine or glycated hemoglobin levels.This data suggests an increased glycation of both plasma proteins and glycated hemoglobin in acute myocardial patients, which might be independent of prevailing glucose concentration.

Loading PhD student collaborators
Loading PhD student collaborators