Spectral Clustering and Vantage Point Indexing for Efficient Data Retrieval

Data mining is an essential process for identifying the patterns in large datasets through machine learning techniques and database systems. Clustering of high dimensional data is becoming very challenging process due to curse of dimensionality. In addition, space complexity and data retrieval performance was not improved. In order to overcome the limitation, Spectral Clustering Based VP Tree Indexing Technique is introduced. The technique clusters and indexes the densely populated high dimensional data points for effective data retrieval based on user query. A Normalized Spectral Clustering Algorithm is used to group similar high dimensional data points. After that, Vantage Point Tree is constructed for indexing the clustered data points with minimum space complexity. At last, indexed data gets retrieved based on user query using Vantage Point Tree based Data Retrieval Algorithm.  This in turn helps to improve true positive rate with minimum retrieval time. The performance is measured in terms of space complexity, true positive rate and data retrieval time with El Nino weather data sets from UCI Machine Learning Repository. An experimental result shows that the proposed technique is able to reduce the space complexity by 33% and also reduces the data retrieval time by 24% when compared to state-of-the-art-works

Visual inspection on cervix with acetic acid and Lugol’s iodine as a screening tool in detection of carcinoma cervix

Background: Cervical cancer is a preventable and curable disease. In Indian women cervical malignancy accounts for 26.1–43.8% of all cancers. Visual inspection with acetic acid (VIA) or visual inspection with Lugol's iodine (VILI) are considered to be a promising screening tools alternative to cervical cytology for primary cervical cancer screening in low resource setting. The purpose of the study is to evaluate VIA and VILI as cervical cancer screening tools in low resource setting; and to compare the efficacy of VIA and VILI in early detection of cancer cervix via colposcopy.Methods: The clinical study was conducted on 80 gynecological patients with history of heavy menstrual bleed and post-coital bleeding are included in study. Unmarried women patients, and active vaginal bleeding, were excluded. A biopsy was taken in patients with abnormal findings or suspicious findings of VIA/VILI.Results: In the present study, sensitivity of VIA and VILI is 90% and 50% respectively, specificity of VIA and VILI is 98.57% and 100% respectively, positive predictive value of VIA and VILI are 90%, 100% respectively, negative predictive value of VIA and VILI are 98.57% and 93.3% respectively with biopsy as the reference standard.Conclusions: It is concluded that VIA and VILI are good screening test in low resource setting as it can used in strategy of see and treat and screen and treat since there is low compliance of follow up of patients

ESTIMATION OF RESPIRATORY RATE FROM ECG

Clinical investigation of some sleep disorders, stress testing, ambulatory monitoring requires simultaneous monitoring of heart rate and respiratory rates. [3] Numerous methods have been reported for deriving respiratory information from the electrocardiogram (ECG). [1] Initially ECG signal is sent to microcontroller AT89S52 through ADC0848. The digital samples are once again transmitted to personal computer via a cable. The digital data is read with the help of graphical user interface software – Visual C++ (serial port programming). The data is stored in an array and the QRS peaks per minute are detected & heart rate is calculated. As these QRS peaks consist of respiratory information, an algorithm will be applied onto the QRS data to find the number of slopes per minute, which gives the respiratory rate. Hence the Heart Rate & Respiratory Rate per minute will be calculated and displayed real time on PC

Deposition of Cadmium Sulphide Thin Films by Photochemical Deposition and Characterization

Deposition of cadmium sulphide (CdS) thin films on glass substrates in acidic medium by photochemical deposition (PCD) and studies by several characterizations are presented. The structural characterization of the thin films was carried out by XRD. The elemental composition of the thin films was carried out by EDAX. The optical properties have been studied in the wavelength range 200-900 nm and the optical transition has been found to be direct and allowed. The morphological properties are studied by AFM and electrical properties are studied by four probe technique

Growth and characterization of CDs thin films by photochemical and chemical bath deposition

Chemical solution deposition methods namely photochemical and chemical bath depositions are used to deposit cadmium sulphide (CdS) thin films on insulating glass substrates. In photochemical deposition (PCD), the deposition occurs by light induced reactions in the chemical solution. A substrate is immersed in the deposition solution and irradiated with ultraviolet light. Then the compound is formed in the solution due to photochemical reactions and deposited in the irradiated region of the substrate. The reactions occur only in the irradiated region, and the deposition process can be easily controlled by turning on/off the light. While in chemical bath deposition (CBD), the deposition occurs by chemical reaction promoted by thermal energy. The films obtained by both methods are characterized by XRD, UV-Visible spectrophotometer, Photoluminescence and Raman measurements. A comparative analysis is presented

Response to autotomy in anesthetized freshwater crab, Paratelphusa hydrodromous (Herbst)

To extend the knowledge of amputation and induction of autotomy, the freshwater crab Paratelphusa hydrodromous (Herbst) was chosen as a model system. Amputation of different legs of Paratelphusa hydrodromous (Herbst) was done in two conditions; normal and anesthetized crab. Autotomy of the amputated legs under normal condition was induced autotomy within seconds (1.6 to 37 seconds). However, the amputation conducted in ice cold anesthetized crab showed delayed autotomy in a wide range of time from 10.2 ± 0.83 minutes (cheliped) to 114.8 ± 4.3 minutes (2nd walking leg). The observations suggest that ice cold anesthesia lowers the signaling of pain to the brain and delays autotomy, the voluntary mechanism to escape from the predator/pain or frightened force

Top Quark Physics at the Tevatron

The discovery of the top quark in 1995, by the CDF and D0 collaborations at the Fermilab Tevatron, marked the dawn of a new era in particle physics. Since then, enormous efforts have been made to study the properties of this remarkable particle, especially its mass and production cross section. In this article, we review the status of top quark physics as studied by the two collaborations using the p-pbar collider data at sqrt(s) = 1.8 TeV. The combined measurement of the top quark mass, m_t = 173.8 +- 5.0 GeV/c^2, makes it known to a fractional precision better than any other quark mass. The production cross sections are measured as sigma (t-tbar) = 7.6 -1.5 +1.8 pb by CDF and sigma (t-tbar) = 5.5 +- 1.8 pb by D0. Further investigations of t-tbar decays and future prospects are briefly discussed.Comment: 119 pages, 59 figures, 17 tables Submitted to Int. J. Mod. Phys. A Fixed some minor error