5 research outputs found
Mid-flight Aircraft Recharging System
No full textAE3200 - Design Synthesis ExerciseAerospace Engineerin
Effects of Magnetic Field and Chemical Reaction on a Time Dependent Casson Fluid Flow
No full textThis research paper deals with the effect of chemical reactions and magnetic fields on the hydrodynamics fluid flow of Casson fluid. The novelty of this work is the inclusion of time-dependent flow across a vertical plate with a stepped concentration at the surface in a porous media. The stated phenomenon is modeled in the PDE system and is adapted in the ODE system through similarity transformation. The LT (Laplace Transform) and ILT (Inverse LT) are used to obtain the analytical results for regulating dimension-free movement, thermals, and concentration expression. The exact expression of shear rate, heat exchange rate, and mass exchange rate are obtained. The consequences of different tangible parameters in proposed problems were presented by diagrams. From the result, it is concluded that velocity profiles are delayed with rising the number of magnetic fields. It can be analyzed that temperature is enhanced with thermal radiation, whereas concentration profiles are delayed with chemical reaction parameters
OUTCOME OF PATIENTS WITH HEMORRHOIDAL DISEASE TREATED BY HYBRID DIGITAL HEMORRHOIDAL ARTERY LIGATION WITH LASER HEMORRHOIDOPLASTY
No full textObjectives: The objectives of the study are as follows: (1) To analyze the efficacy of hybrid digital hemorrhoidal artery ligation (HAL) with laser hemorrhoidectoplasty in terms of post-operative pain as well as time taken to return to daily routine activities. (2) To analyze complications as recurrence rates in studied patients.
Methods: This was a prospective study conducted in the Department of General Surgery, GMERS Medical College Navsari, Gujarat, India. Sixty adult patients with haemorrhoids were included in the study on the basis of a predefined inclusion and exclusion criteria. All patients underwent HAL with laser hemorrhoidectoplasty. Patients were followed up for pain (as assessed by Visual Analog score), per rectal bleeding and whether they have completely returned to their pre-intervention activities. Complications and recurrence rates were also analyzed.
Results: There were 38 (63.33%) males and 22 (36.67%) females with male preponderance having an M: F ratio of 1:0.57. The mean age of the studied cases was found to be 43.24±13.98 years. The most common presenting complaint was rectal bleeding which was seen in 54 (90%) patients followed by pain (80%) and pruritis (30%). Prolapse was seen in 12 (20%) patients. The mean duration of post-operative bleeding was 28.36±9.86 h. Mean duration when pain-free bowel movement occurred was found to be 21.86±12.76 h. At 1-month follow-up, pain has been reduced as compared to at the time of presentation and the difference was found to be statistically highly significant (p<0.0001). Mean duration of hospital stay was found to be 2.12±1.14 days. In 3 patients (5%), there was recurrence during follow-up period of 6 months.
Conclusion: Hybrid digital HAL with laser hemorrhoidoplasty is a minimally invasive procedure found to have excellent outcome, with respect to reduced post-operative pain and low complication rates
Amphiphilic block copolymers : synthesis, self-assembly and applications
No full textSelf-assembly of amphiphilic block copolymers in aqueous solution is one of the most important nanotechnological methods to prepare nanocarriers for
different applications, such as drug delivery, biosensor, nanoreactor and so on. Synthesis of new types of amphiphilic block copolymers with novel
functionality and detailed characterization of self-assembly, influenced by self-assembly methods and different other parameters (molecular weight,
hydrophilic to hydrophobic ratio), are important. Especially, building up the relationship between the self-assembled nanomorphologies and molecule
constitution are helpful to understand amphiphilic block copolymer self-assemble theroy.
In this thesis, I present to you the influence of different parameters on the self-assembly nanostructures for the poly(dimethylsiloxane)-
block-poly(2-methyl-2-oxazoline) (PDMS-b-PMOXA) amphiphilic block copolymers.3D phase diagram clearly shows in which domain the PDMS-b-PMOXA
self-assemble into polymersome. The polymersome are possible for us to constribute the nano-sized based nanoreactor.
In addition, in order to develop more functional amphiphilic block copolymers and enlarge the potential application areas, another two types of
copolymers, grafted poly(2-methyl-2-oxazoline)-graft(ss)-poly(e-caprolactone) (PMOXA-graft(ss)-PCL) and linear poly(2-ethyl-2-oxazoline)-block-
poly(e-caprolactone)-ss-poly(L-lysine) (PEtOXA-b-PCL-ss-PLL), were designed and synthesized with reduction responsiveness, utilizing different
polymerization techniques, including ring openning polymerization and "graft-to" technology. Due to the amphiphilicity of these two types of
copolymers, nanoparticles are formed by them in aqueous solution. The primary evaluation of these two new type amphiphilic block copolymers
demonstrated that they can be promising candidates as smart nanocarries for the application of drug delivery.
In this dissertation, the result of our research have been comprehensivly compared with other publications and results from different groups.
We have new findingS. We find one new nano-object with 80-100 nm diameter, but without hollow aqueous cavity.
We also realize that basing on poly(2-ethyl-2-oxazoline)-block-poly(e-caprolactone)-ss-poly(L-lysine) (PEtOXA-b-PCL-ss-PLL) copolymer, it is possible
to synthesize more functional copolymer, for example introducing the pH-cleavable linker between PEtOXA and PCL, to mimic more closely the virus delivery
gene into cells
Robust Face Recognition System in Video using Hybrid Scale Invariant Feature Transform
No full textAbstractFace recognition plays a significant role in the research field of biometric and computer vision. The important goal of an efficient Face Recognition (FR) system is to have negligible misclassification rate. In video-based face recognition system, the illumination and pose variation problems are predominant. Most of the efficient FR systems are developed for controlled or indoor environment, hence they fail to give accurate recognition in outdoor environment of different illumination variation. Other challenges include occlusion and facial expression. The illumination problem is handled by Histogram Equalization in existing methods. The original Scale Invariant Feature Transform (SIFT) also works well only for pose variation and fails to produce satisfactory results under varying illumination. Hence Hybrid Scale Invariant Feature Transform (HSIFT) with Weighting Factor in feature matching is proposed in this paper which uses a fixed facial landmark localization technique and orientation assignment of SIFT to extract illumination and pose invariant features. The extracted features are then matched using Fast Library for Approximation of Nearest Neighbor (FLANN). The proposed method has been implemented in OpenCV to give a recognition rate of 98% and 95.5% in YouTube celebrity and Extended Yale B dataset respectively
