Real-Time Face Recognition System Using KPCA, LBP and Support Vector Machine

With increasing security threats, Biometric systems have importance in different fields. This appears clearly exactly after the rapid development that happened in power of computing. In this paper, the Design and implementation of a real-time face recognition system are presented. In such a system, Kernel principal component analysis (KPCA) and Local binary pattern (LBP) are used as feature extraction methods with the aid of support vector machine (SVM) to work as a classifier. A comparison between traditional feature extraction methods as (PCA and LDA) and a proposal methods are performed as well as a comparison between support vector neural network and artificial neural network classifier are also implemented. Two types of experiments, On-line, and Off-line experiments are done. In the On-line experiment, a new database is created and used. While in the off-line experiment, two types of databases (ORL and YALE) are used to estimate the performance and efficiency of the system. The combinations of these methods together enhances the experimental results in compare with other methods

The Experimentally Studying of Solid Desiccant Wheel Performance Combined with the System of Air Conditioning

تهدف هذه الدراسة إلى دراسة أداء نظام إزالة الرطوبة المجففة الصلب لتقليل الحمل الكامن على ملف التبريد لنظام تكييف الهواء وتحسين الراحة الحرارية، وبالتالي تقليل استهلاك الطاقة. تحتوي العجلة الدوارة المجففة على هلام السيليكا كما تم استخدام مادة صلبة ماصة للرطوبة في هذه الدراسة. العجلة قطرها 550 مم وسمكها 200 ملم. تنقسم مساحة المقطع العرضي للعجلة إلى جزئين في نسبة العرض إلى الارتفاع. الجزء الكبير يمثل عملية إزالة الرطوبة أو الامتصاص، في هذا القسم تتم إزالة الرطوبة من الهواء الرطب بواسطة هلام السيليكا. بينما يمثل الجزء الآخر عملية الامتصاص أو التجديد في هذا القسم تم امتصاص الرطوبة من الهواء الرطب بواسطة هلام السيليكا في العملية الأولى سيتم إزالتها منه. أظهرت النتائج التجريبية أن استخدام عجلة التجفيف سيقلل بشكل كبير الحمل الحراري على ملف التبريد عن طريق تقليل الحمل الكامن للهواء الرطب الذي يمر عبر العجلة ولفائف التبريد.The aim of this study was to study the performance of the system of solid desiccant dehumidification to decrease the latent load on cooling coil for the system of air-conditioning and advance the thermal comfort, thus reduce the energy consumption. Rotary desiccant wheel contains a silica gel as a solid moisture absorbent material has been utilized in this study. The wheel was a diameter of 55 cm and a thickness of 20 cm. The wheel cross sectional area is divided into two parts in aspect ratio. The large part represent dehumidification or absorption process, in this section moisture is removed from the humid air by the silica gel. While the other part represent desorption or regeneration process in this section moisture was absorbed from the humid air by the gel of silica in the first process will be removed from it. The experimental results demonstrates that the utilizing of the desiccant wheel will reduce significantly the thermal load on the cooling coil by reducing the latent load of the passing of humid air respectively via the wheel and the cooling coi

Breast Cancer Diagnostic System Based on MR images Using KPCA-Wavelet Transform and Support Vector Machine

Automated detection and accurate classification of breast tumors using magnetic resonance image (MRI) are very important for medical analysis and diagnostic fields. Over the last ten years, numbers of methods have been proposed, but only few methods succeed in this field. This paper presents the design and the implementation of CAD system that has the ability to detect and classify the tumor of the breast in the MR images. To achieve this, k-mean clustering methods and morphological operators are applied to segment the tumor. The gray scale, Texture and symmetrical features as well as discrete wavelet transform (DWT) are used in feature extracted stage to obtain the features from MR images. Kernel principle components analysis (K-PCA) are also applied as a feature reduction technique and support vectors machine (SVM) are used as a classifier. Finally, the experiments results have confirmed the robustness and accuracy of proposed syste

Motion artifacts reduction in cardiac pulse signal acquired from video imaging

This study examines the possibility of remotely measuring the cardiac pulse activity of a patient, which could be an alternative technique to the classical method. This type of measurement is non-invasive. However, several limitations may deteriorate the accuracy of the results, including changes in ambient illumination, motion artifacts (MA) and other interferences that may occur through video recording. The paper in hand presents a new approach as a remedy for the aforementioned problem in cardiac pulse signals extracted from facial video recordings. Partitioning provides the basis for the presented MA reduction method; the acquired signals are partitioned into two sets for each second and every partition is shifted to the mean level and then all the partitions are recombined again into one signal, which is followed by low-pass filtering for enhancement. The proposed compared with ordinary pulse oximetry Photoplethysmographic (PPG) method. The resulted correlation coefficient was found (0.957) when calculated between the results of the proposed method and the ordinary one. Experiments were implemented using a common camera by creating a dataset from 11 subjects. The ease of implementation of this method with a simple that can be used to monitor the cardiac pulse rates in both home and the clinical environments

Cu2+ and Al3+ co-substituted cobalt ferrite: structural analysis, morphology and magnetic properties

Cu-Al substituted Co ferrite nanopowders, Co1-xCux Fe2-x Alx O4 (0.0 ≤ x ≤ 0.8) were synthesized by the co-precipitation method. The effect of Cu-Al substitution on the structural and magnetic properties have been investigated. X-ray diffraction (XRD) spectroscopy, Fourier transform infrared (FTIR) spectroscopy, field emission scanning electron microscopy (FESEM) and vibrating sample magnetometer (VSM) are used for studying the effect of variation in the Cu-Al substitution and its impact on particle size, magnetic properties such as Ms and Hc. Cu-Al substitution occurs and produce a secondary phase, α-Fe2O3. The crystallite size of the powder calcined at 800°C was in the range of 19-26 nm. The lattice parameter decreases with increasing Cu-Al content. The nanostructural features were examined by FESEM images. Infrared absorption (IR) spectra shows two vibrational bands; at around 600 (v1) and 400 cm-1 (v2). They are attributed to the tetrahedral and octahedral group complexes of the spinel lattice, respectively. It was found that the physical and magnetic properties have changed with Cu-Al contents. The saturation magnetization decreases with the increase in Cu-Al substitution. The reduction of coercive force, saturation magnetization and magnetic moments are may be due to dilution of the magnetic interaction

Evaluation of time in therapeutic range (TTR) in patients with non-valvular atrial fibrillation receiving treatment with warfarin in Tehran, Iran: A cross-sectional study

Introduction: Anticoagulant control is assessed by Time in Therapeutic Range (TTR). For a given patient, TTR is defined as the duration of time in which the patient�s International Normalized Ratio (INR) values were within a desired range. Aim: To assess TTR in patients receiving treatment with warfarin for non-valvular atrial fibrillation at a referral center for cardiovascular diseases in Tehran, Iran. Materials and Method: Over 6 months, we enrolled eligible patients presenting to Shaheed Rajaie Hospital in Tehran for regular INR testing. Demographic data, medical history, and current medications were determined for all participants. TTR was assessed by the Rosendaal method. Results: A total of 470 patients (mean age 58.0±14.2 years, 60.2 women) underwent 1450 INR measurements. The mean TTR was calculated as 54.9±11.9. Of the sample patients, 37.3 were in the good control category (TTR > 70), 24.6 were in the intermediate category (50 < TTR < 70), and 38.1 were in the poor control category (TTR < 50). The number of current medications above four was a significant predictor of poor control (OR = 2.06; 95 CI, 1.87, 2.23). The mean TTR of the studied patients (54.9) was below the good control range. Conclusion: The quality of anticoagulant therapy with warfarin in Iranian patients is poorer than that reported in European countries. Based on these results, research considering the causes of poor TTR among Iranian patients is recommended. © 2016, Journal of Clinical and Diagnostic Research. All rights reserved

A Numerical And Experimental Study of Louvered Fin Heat Exchanger Performance

The louvered fin heat exchanger is a very widely used method to increase thecompact heat transfer coefficient on the air-side of condensers by adding fins andinitiating new boundary layer growth and increasing surface area. The governingequations of such application are the Navier Steckes equation and energy equation. Atwo-dimensional, turbulent, compressible flow is simulated and solved. The solutiongives the distributions of velocity and temperature (which is represented by Nusseltnumber). Laminar and turbulent flow were studied experimentally and only turbulentflow was studied theoretically, for a range of ReLp 230 to 8100 with constant inlettemperature of 21C˚with two angles of louver fin 27˚ and 35 ˚. The ideal geometry forheat transfer performance was determined to be dependent on Reynolds number. Atlower Reynolds number the optimal geometry was found to be θ = 27º and at highReynolds number the ideal geometry was determined to beθ = 35º, Fp/Lp = 0.58

In vivo and ex vivo effects of propofol on myocardial performance in rats with obstructive jaundice

BACKGROUND: Responsiveness of the 'jaundiced heart' to propofol is not completely understood. The purpose of this study was to evaluate the effect of propofol on myocardial performance in rats with obstructive jaundice. METHODS: Male Sprague-Dawley rats (n = 40) were randomly allocated into two groups, twenty underwent bile duct ligation (BDL), and 20 underwent a sham operation. Seven days after the surgery, propofol was administered in vivo and ex vivo (Langendorff preparations). Heart rate, left ventricular end-systolic pressure (LVESP) left ventricular end-diastolic pressure (LVEDP), and maximal rate for left ventricular pressure rise and decline (+/- dP/dtmax ) were measured to determine the influence of propofol on the cardiac function of rats. RESULTS: Impaired basal cardiac function was observed in the isolated BDL hearts, whereas in vivo indices of basal cardiac function (LVESP and +/- dP/dt) in vivo were significantly higher in rats that underwent BDL compared with controls. With low or intermediate concentrations of propofol, these indices of cardiac function were within the normal physiologic range in both groups, and responsiveness to propofol was unaffected by BDL. When the highest concentration of propofol was administrated, a significant decline in cardiac function was observed in the BDL group. CONCLUSIONS: In rats that underwent BDL, basal cardiac performance was better in vivo and worse ex vivo compared with controls. Low and intermediate concentrations of propofol did not appear to impair cardiac function in rats with obstructive jaundice.published_or_final_versio

An Analysis of the Discrepancy between the Students' Responses to Multiple-Choice and Open-Ended Questions

Guidelines for Assessment and Instruction in Statistics Education (GAISE)provide a framework for revising introductory statistics courses. GAISE promotes statistical literacy and statistical thinking, where students not only understand concepts but are able to critically evaluate and make arguments based on quantitative information.There are multiple definitions of statistical literacy and statistical thinking inthe literature. In this thesis we are interested in the aspect of statistical literacythat aims for an educated consumer, one who can process everyday statisticalinformation. Further, Statistical thinking is present when students can apply the statistical information learned to situations such as: 1) using statistics to solve real world problems, 2) critique and interpretation of statistical information reported in the mass media, and 3) interpretation and communication of statistical findings within context .Despite this growing consensus that students must acquire higher-order think-iing and performance skills in order to apply statistical reasoning and thinkingto their research problems successfully, a gap still exists between course objectives and student outcomes. After completion of the coursework, students are more likely to forget the materials learned in course and continue to struggle with applying statistical reasoning and thinking. The type of assessment used in statistics courses provides one explanation for this gap. With the increase number of students enrolled in introductory courses, instructors rely heavily on multiple choice questions to evaluate students0undesrtanding of course materials and principles. Furthermore, in subjects such as mathematics, statistics, chemistry, biology, and physics, research has shown that about 70% of the questions are at the recall or comprehension level with very little attention paid to the questionsthat target application, analysis, synthesis, and evaluation. Therefore, and based on Bloom's taxonomy, the student outcomes focus on lower level thinking skills (knowledge and comprehension), whereas the course objectives and expectations involve higher level of thinking skills (application, analysis, synthesis, and evaluation). In order to bridge the gap between objectives and outcomes, tests must provide students opportunities to employ higher order thinking.The objectives of this thesis include:1. Comparison of students'responses to open-ended questions on condenceinterval and P-value.2. Prediction of the students' final scores from their scores on "upper levelthinking", "application", "lower level computation and "upper level computation".3. Pinpoint the students'misconceptions of the P-value by comparing the pro-portion of correct answers under two conditions including: a) deciding aboutthe null hypothesis by comparison of the P-value Vs. level of signicanceor alpha, and b) deciding about the null hypothesis by examination of thecondence interval and the interpretation of the P-vlaue