Conformal mapping of unbounded multiply connected regions onto canonical slit regions

We present a boundary integral equation method for conformal mapping of unbounded multiply connected regions onto five types of canonical slit regions. For each canonical region, three linear boundary integral equations are constructed from a boundary relationship satisfied by an analytic function on an unboundedmultiply connected region. The integral equations are uniquely solvable. The kernels involved in these integral equations are the modified Neumann kernels and the adjoint generalized Neumann kernels

Employee attitudes as a mediator between HRM and organizational performance

Attitude is a power that controls human behaviour. When employee Attitude is positive, it can give impact positive to organization performance. A proper human resource management (HRM) managed by organization, the employee attitude will be affected. HRM practices influence employee attitude positively and there is a mediating role of employee attitude between training and development dimension of HRM practices and organizational performance. Therefore, the purpose of this study is to explore employee atttiude as a mediator between HRM and organizational performance. A sample of this study was 219 respondents from employee construction in Libya. The data was analyzed using structural equation modelling (SEM) approach. This study showed that employee attitudes is a full mediator between relationship HRM and organizational performance. Therefore, HRM practices influence employee attitude and its give impact to organizational performance for more effective and efficient in achieving organization goal

Propagation of Grapefruit (Citrus Paradisi Macf) by Shoot Tip Micrografting

This study was conducted to develop an in vitro technique for micrografting of grapefruit on sour orange rootstock during August, 2001 to May, 2002. The best in vitro germination of rootstock seed was obtained when both seed coats (hard and soft) were removed before in vitro culturing on a nutrient medium. The success of micrografting was affected by the age of rootstock seedling, light incubation conditions, source and method of placement of meristem tips and concentration of sucrose in the nutrient medium. High frequency of successful micrografts was obtained when the rootstock seedlings were germinated under darkness till the age of two weeks and then incubated in the same condition for two to three weeks after grafting. Plants grown in the greenhouse were the best source for meristem tips. Placement of scion on an inverted T incision at the point of decapitation was found to be the most suitable method of micrografting. The frequency of successful micro. grafts improved significantly when Murashige and Skoog medium was supplemented with 7.5% sucrose compared with normal sucrose concentration (3%).. INTRODUCTIO

Is Helicobacter Pylori Associated with a Migraine?

Objective: To determine whether Helicobacter pylori (H. pylori) is associated with migraine headache. Design: Case-control study. Settings: Local tertiary Hospitals in Cairo, Egypt and in HaferAlbaten, Saudi Arabia. Participants: A total of 70 patients with migraine who were 7 to 17 years old and who fulfilled the International Headache Society criteria for migraine and a total of 50 controls without migraine who were matched by the country of origin, age, sex, ethnicity, and socioeconomic status to the 70 migraine cases. Main Outcome Measures: Antibody levels to H. pylori (IgG) and H. pylori stool antigens were compared between the two groups. Results: Significant association was found between H. pylori and migraine and of the total of 70 migraineur cases, 55.7% were positive for H. pylori stool antigen testing compared to 20% in control group (P value=0.0002). Joint pain was reported in 44.3% and 18.0% of cases and controls respectively (P value=0.0034). Conclusion: H. pylori is associated with migraine without aura and may be a causative factor. Moreover, H. pylori may induce joint pain in the migraineur patients

Radiography of Manus and Pes in Hard Working Donkeys

The present study aimed to highlights on the radiographic appearance of extensive new bone formation in equine limbs, which resulted from recurrent mild traumas to the limbs in hard working donkeys. The study was carried out on 36 hard working donkeys admitted to the Veterinary Teaching Hospital, Assiut University suffering from different types and forms of lameness (new bone growth). Based on history, clinical signs and radiographic examinations, various types of osteophytes were diagnosed and recorded including: ringbone (20 animals), splints (6 animals), osselets (4 animals), sesamoiditis (4 animals) extensive foot osteophytes (one animal) and splints with accidental absence of digit (one animal)

Comparison between physical properties of ring-spun yarn and compact yarns spun from different pneumatic compacting systems

A comparative study pertaining to physical and mechanical properties of ring-spun yarn vis-à-vis compact yarns spun using three different compacting systems has been reported. Rieter (K-44), Toyota (RX-240) and Suessen (Fiomax) spinning machines have been used and the condensing process of the fibres in the yarn cross-section as per these compact spinning systems is accomplished pneumatically. Thus, a yarn of linear density 5.9 tex (100 Ne) is spun on the spinning systems using Egyptian cotton of the type Giza 86. One way Anova together with least significant difference are employed to feature the means of the properties of spun yarns and a significant difference among them is observed. According to the performed statistical analysis, there is a significant difference between ring - spun yarn properties and each of the pnuematic compact spun yarns. These compact-spun yarns are also found to differ significantly in terms of their physical and mechanical properties; however, they are all found superior to the ring-spun yarn

THE CHALLENGES OF SUSTAINABLE HISTORICAL CENTERS: THE CASE OF ROSETTE, EGYPT

Historical centers of many Egyptian cities managed to survive as living cities in spite of physical decline and economic depression. Their fabric carries out the spiritual and cultural messages that communicate with their present citizens. The heritage of these historic city centers are not only Material character, but much more. Generally, the conservation of historic centers is fundamentally different from conservation of single monument. While a single monument can be kept on a chosen state of evolution, the historic centers cannot be preserved in particular state \u201cwith exception of the small areas conserved for tourist purposes\u201d. The historic centers, as living cities must meet the varying needs of citizens with sustainable transformations. The challenge is not how to preserve, but how to create dynamic living spaces and places that produce rich in cultural traditions that lead organically from the past to the future. The research will study and analyze the historical center of \u201cRosetta\u201d, which is one of the intermediate cities in northern Egypt that has a particular architectural heritage and many urban problems. The city of Rosetta (Rashid in Arabic) is located on the west bank of the Rosetta branch of the Nile, approximately 65km east of Alexandria on the Mediterranean coast. Today it is best known for the Rosetta stone, which was discovered in the Qayitbay castle in 1799. The city history passed over many periods of increase and decrease in its importance due to economical and political reasons. Its architectural heritage reveals the influence of various ages, but the most unique are merchant houses and mosques from the ottoman period. The city also has a particular suburban landscape of agricultural land and palm groves that are of great importance. Although Rosetta is no longer a leading commercial center, its citizens are employed in various typical activities, which are mainly agriculture, stocking and processing rice from the Delta, fishing and building ships and yachts. The main problem that faces the historic buildings of Rosetta is moisture from the soil, caused by an excess of underground salt water. The historic merchant houses have been the subject of many restoration projects over the past 20 years, but many of them have regularly been re-damaged by water and humidity and are currently under re-restoration. Unfortunately, some have even collapsed or were demolished. However, there are a number of activities that may take place in the historic buildings no longer used, maintaining the characteristics, such as crafts centers, libraries and cultural places that serve the local communities. Rosetta's historic center future must include renovation and modernization of basic infrastructure and development of traditional production sectors, based on the exploitation of this natural and cultural heritage to promote tourism locally and internationally. Physical restoration of the buildings is not enough to keep the historic center of the city alive, but a project for rehabilitation based on sustainability should be initiated. Not only to preserve and restore the outer shell, but inside the shell should insert some activities, social and economic dynamics that can make best use of resources and potential. The revitalization of Rosetta provides a mix of cultural, social, economic, technical and institutional that needs coordinated investments by the government. Must involve residents, landowners and all those have interest to ensure the careful maintenance and replacement of the elements of the built environment. This does not only depend on the availability of funding but also the specific technical and social skills that make up the traditional know-how. Unfortunately, many historical cities, especially the intermediate cities in Egypt suffer from lack of funds and local expertise. But the main problem is the lack of cooperation between the authorities who make the decisions

Spatiotemporal Mapping and Monitoring of Mangrove Forests Changes From 1990 to 2019 in the Northern Emirates, UAE Using Random Forest, Kernel Logistic Regression and Naive Bayes Tree Models

© Copyright © 2020 Elmahdy, Ali, Mohamed, Howari, Abouleish and Simonet. Mangrove forests are acting as a green lung for the coastal cities of the United Arab Emirates, providing a habitat for wildlife, storing blue carbon in sediment and protecting shoreline. Thus, the first step toward conservation and a better understanding of the ecological setting of mangroves is mapping and monitoring mangrove extent over multiple spatial scales. This study aims to develop a novel low-cost remote sensing approach for spatiotemporal mapping and monitoring mangrove forest extent in the northern part of the United Arab Emirates. The approach was developed based on random forest (RF), Kernel logistic regression (KLR), and Naive Bayes Tree machine learning algorithms which use multitemporal Landsat images. Our results of accuracy metrics include accuracy, precision, and recall, F1 score revealed that RF outperformed the KLR and NB with an F1 score of more than 0.90. Each pair of produced mangrove maps (1990–2000, 2000–2010, 2010–2019, and 1990–2019) was used to image difference algorithm to monitor mangrove extent by applying a threshold ranges from +1 to −1. Our results are of great importance to the ecological and research community. The new maps presented in this study will be a good reference and a useful source for the coastal management organization