Assessment of Urban Heat Island (UHI) using Remote Sensing and GIS

This study assesses the Urban Heat Island UHI effect and evaluates the impact of urban suburban areas in Lahore District on its land surface temperature using Remote Sensing and GIS techniques The satellite brightness temperature information derived from the medium resolution satellite LANDSAT 5 Thematic Mapper is analyzed and compared with the land use land cover types acquired by classifying the image The results reveal that urban heat island in Lahore District is significant with average Land surface temperature values ranging from 23 C to 44 C and maximum urban non-urban temperature difference reaching 5 C The high built-up area exhibits the maximum surface temperature ranges from 31 to 44 C compared to other land use types The relationship between thermal behavior and NDVI is also analyzed and negative correlation is identified by the results from the extracted surface temperature and NDVI from Landsat This suggests that vegetation is the primary determinant controlling the spatial distribution of land surface heat An effort to compare the population density and air pollution parameters with surface temperature is also made and the air pollution concentration is considered in relation with urban areas of high temperature and high population densit

Assessment of Urban Heat Island (UHI) using Remote Sensing and GIS

This study assesses the Urban Heat Island UHI effect and evaluates the impact of urban suburban areas in Lahore District on its land surface temperature using Remote Sensing and GIS techniques The satellite brightness temperature information derived from the medium resolution satellite LANDSAT 5 Thematic Mapper is analyzed and compared with the land use land cover types acquired by classifying the image The results reveal that urban heat island in Lahore District is significant with average Land surface temperature values ranging from 23 C to 44 C and maximum urban non-urban temperature difference reaching 5 C The high built-up area exhibits the maximum surface temperature ranges from 31 to 44 C compared to other land use types The relationship between thermal behavior and NDVI is also analyzed and negative correlation is identified by the results from the extracted surface temperature and NDVI from Landsat This suggests that vegetation is the primary determinant controlling the spatial distribution of land surface heat An effort to compare the population density and air pollution parameters with surface temperature is also made and the air pollution concentration is considered in relation with urban areas of high temperature and high population densit

Porokeratosis ptychotropica: a rare case report with unusual presentation

Porokeratosis is a rare disorder of epidermal keratinization characterized clinically by annular plaque with thread like hyperkeratotic border with a central groove that expand centrifugally and this border corresponds to coronoid lamellae histologically which are the columns of parakeratosis that overlie an epidermal invagination with loss of granular layer and dyskeratosis of upper spinous keratinocytes. The disorder was erroneously named porokeratosis because the coronoid lamella was initially described as being present over a sweat pore, which is a fixed structure that cannot expand peripherally. Five primary clinical variants have been described: classic porokeratosis of mibelli, disseminated superficial actinic porokeratosis, linear porokeratosis, punctate porokeratosis and porokeratosis palmaris et plantaris disseminate. Porokeratosis ptychotropica one of the rare variants of porokeratosis described by lucker et al which has been added recently in the classification. It is characterized clinically by symmetrical verrucous papules and plaques resembling psoriasis plaque in the gluteal cleft, buttocks and rarely extends to genitalia and histologically by multiple coronoid lamella. We report a case of 43year old female, presented with 10years duration of pruritic raised skin lesion over the left gluteal region. Dermatological examination revealed single well defined erythematous scaly plaque with central atrophy, hyperpigmentation and peripheral thread like elevated border. Histopathological examination revealed multiple coronoid lamella which is the hallmark for porokeratosis ptychotropica, confirmed the diagnosis. The patient was treated with 5-fluorouracil cream. we report this case due to its rarity and the unusual presentation of single plaque of porokeratosis ptychotropica

Determination and Distribution Map for Radionuclides in Soil Samples from Different Location by Gamma Spectrometry Using Software Analysis

The fundamental goal of the current study is to determine the mean activity concentrations of natural and artificial radionuclides of 226Ra, 232Th, 40K, and 137Cs using gamma spectrometry for three locations, in Egypt, Saudi Arabia, and Iraq, which are significant and vital countries in the Middle East. The mean absorbed dose rate equals 22.35, 28.96, and 43.34 nGy h-1 for Egypt, Saudi Arabia, and Iraq. The results are consistent with international reports. The dose contribution percentages for investigated locations are 24 %, 30 %, and 46 % for Egypt, Saudi Arabia, and Iraq, respectively. The obtained results were clarified by statistical measurements using one-way ANOVA test to determine the distribution and differences between the averages of the three groups under study, as they may be influenced by geological variations and human intervention. It was found that the Iraq samples followed a symmetrical, standard normal distribution, while samples from Egypt and Saudi Arabia did not. Statistically significant differences were found between the data from the three countries

Ethnic inequalities in the treatment and outcome of diabetes in three English Primary Care Trusts

BACKGROUND:Although the prevalence of diabetes is three to five times higher in UK South Asians than Whites, there are no reports of the extent of ethnicity recording in routine general practice, and few population-based published studies of the association between ethnicity and quality of diabetes care and outcomes. We aimed to determine the association between ethnicity and healthcare factors in an English population.METHODS:Data was obtained in 2002 on all 21,343 diabetic patients registered in 99% of all computerised general practitioner (GP) practices in three NW London Primary Care Trusts (PCTs), covering a total registered population of 720,000. Previously practices had been provided with training, data entry support and feedback. Treatment and outcome measures included drug treatment and blood pressure (BP), total cholesterol and haemoglobin A1c (HbA1c) levels.RESULTS:Seventy per cent of diabetic patients had a valid ethnicity code. In the relatively older White population, we expected a smaller proportion with a normal BP, but BP differences between the groups were small and suggested poorer control in non-White ethnic groups. There were also significant differences between ethnic groups in the proportions of insulin-treated patients, with a smaller proportion of South Asians - 4.7% compared to 7.1% of Whites - receiving insulin, although the proportion with a satisfactory HbA1c was smaller- 25.6% compared to 37.9%.CONCLUSION:Recording the ethnicity of existing primary care patients is feasible, beginning with patients with established diseases such as diabetes. We have shown that the lower proportion of South Asian patients with good diabetes control, and who are receiving insulin, is at least partly due to poorer standards of care in South Asians, although biological and cultural factors could also contribute. This study highlights the need to capture ethnicity data in clinical trials and in routine care, to specifically investigate the reasons for these ethnic differences, and to consider more intensive management of diabetes and education about the disease in South Asian patient

A Fuzzy Approach for Feature Evaluation and Dimensionality Reduction to Improve the Quality of Web Usage Mining Results

The explosive growth in the information available on the Web has necessitated the need for developing Web personalization systems that understand user preferences to dynamically serve customized content to individual users. Web server access logs contain substantial data about the accesses of users to a Web site. Hence, if properly exploited, the log data can reveal useful information about the navigational behaviour of users in a site. In order to reveal the information about user preferences from, Web Usage Mining is being performed. Web Usage Mining is the application of data mining techniques to web usage log repositories in order to discover the usage patterns that can be used to analyze the user’s navigational behavior. WUM contains three main steps: preprocessing, knowledge extraction and results analysis. During the preprocessing stage, raw web log data is transformed into a set of user profiles. Each user profile captures a set of URLs representing a user session. Clustering can be applied to this sessionized data in order to capture similar interests and trends among users’ navigational patterns. Since the sessionized data may contain thousands of user sessions and each user session may consist of hundreds of URL accesses, dimensionality reduction is achieved by eliminating the low support URLs. Very small sessions are also removed in order to filter out the noise from the data. But direct elimination of low support URLs and small sized sessions may results in loss of a significant amount of information especially when the count of low support URLs and small sessions is large. We propose a fuzzy solution to deal with this problem by assigning weights to URLs and user sessions based on a fuzzy membership function. After assigning the weights we apply a "Fuzzy c-Mean Clustering" algorithm to discover the clusters of user profiles. In this paper, we describe our fuzzy set theoretic approach to perform feature selection (or dimensionality reduction) and session weight assignment. Finally we compare our soft computing based approach of dimensionality reduction with the traditional approach of direct elimination of small sessions and low support count URLs. Our results show that fuzzy feature evaluation and dimensionality  reduction results in better performance and validity indices for the discovered clusters

Treatment Response of Opium Smoking Hmong Refugees to Methadone Maintenance

Objective: To examine the outcome of methadone maintenance in opium dependent Hmong refugees. Methods: Medical records were searched for Hmong patients in methadone treatment between 01/1995 and 09/1997. Patient\u27s progress was assessed over nine months. Results: 44 Hmong patients were found. Data was available on 40 patients, mean age of 47.7 years, 33 males/7 females. At admission 100% met the DSM-IV criteria for Opium Dependence, 75% Major Depressive Disorder and 68% PTSD. Patients showed marked improvement by having mostly negative urine drug screens, improvement on Addiction Severity Index and 70% being highly successful on outcome criteria modified by Drug Abuse Research Project over 9 months. Conclusions: These findings suggest that opium dependent Hmong patients can show marked improvement while in methadone maintenance program. Prospective controlled studies are warranted