Abstract The research discusses the passive solar energy in cooling the internal gaps, using architectural and urban techniques In the traditional architecture In Libya, aiming to reach to required thermal comfort for humans, particularly in the high temperature areas, It could be done through four chapters in the research, so that shall contain a part of the research content, in addition to results and recommendation, so that shell discuss: First chapter: whereas the research discusses the study of climate elements, which are considered as the most effecting factors on thermal comfort, plus demonstration of climate and climate regions in Libya. Thereafter, the study of traditional architecture in different regions of Libya (cost, mountains, desert), clarification of their most important characteristics and features at architect and urban levels, used materials and methods of construction of the same, then comparison of regions to reach to features of each region. Second chapter: this chapter shall discuss study of humans comfort, and sources of thermal gain and loss between the human body and its ambient, especially by climate factors, the most significant study of thermal gain and loss sources of the building form the direct sun rays, via walls and roofs and movement of the air. Third chapter: the sun rays are deemed the most important climate elements effecting the architectural and urban, which generate other climate elements, such as air movement and humidity …etc, which in turn impact the human thermal comfort. Thus, this chapter focused on study of passive cooling techniques, using urban and architectural technologies, to limit the effect of sun rays, prior to its reach to the building, or to limit its penetration through walls and roofs, passing by historical stops of using passive cooling techniques. Fourth chapter: Addresses this chapter analytical study applied to the methods and techniques of cooling using solar energy passive in traditional architecture, by examining and analyzing the most important of these techniques and treatments Urban and architectural in different regions (coastal, mountain, desert) and benefit from and applied in the local architecture. Finally: the search to a set of findings and recommendations to the effect that he must return to traditional architecture and technologies and processes and take advantage of them to maintain the legacies of urban and architectural history, and development in the local construction and architecture.
يوسف مفتاح الهمالي (2013)

Abstract The aim of this study is to assess the wind energy potential and to compare Weibull and the Maximum Entropy Principle (MEP) distributions, with meteorological measured data. Dernah is selected site, which has good wind characteristics (seasonal, monthly and diurnal wind speed variations and wind direction variations), for possible wind energy applications. The data source is measured at an elevation of 40 m above the ground level for one year period (2003), and it is analyzed statistically. The functions of probability density and power density are calculated using the Weibull and MEP distributions. The Lagrangian multipliers of MEP distribution are estimated numerically at r values of 0 to 5 by using Newton Raphson, Simpson’s rule and Romberg’s methods. The MATLAB simulation is also applied for estimating Lagrangian multipliers. The verification of the results is also assessed by Maple software. The statistical analysis parameters based on wind speed and power density are used as the suitable judgment criterion for the distribution functions. It is found that for MEP distribution, the wind power (W/m2) 450, 395 and 407, are for the cold season, the hot season and for the year 2003, respectively. However, there is no significant difference of the presented peak values of the results in this study for Weibull and MEP distributions. Such result can be attributed to the fact that the average wind speeds were relatively high and the calm spells are about 7% in the year 2003 data.
جبريل يوسف الفيتوري (2010)

Abstract The success of projects are depends on the people involve and how they tackle the design of the projects for specific needs, planning of activities, budget cost and execution to achieve the ultimate goal. Each phase of the project contributes an important task and this will reflect on how good the project management handled by the team.Project management means managing all the relevant activities of the project within the given constraints of time and cost, however , to complete specified project as per schedule and within the allocated budget, an accurate planning and optimization of all available resources will be required to complete all the tasks.During the projects, changes can occur even though the original scope may have been carefully planned. These changes might occur at any times and in ways that are unexpected.Changes during project execution can significantly affect not only time schedule but may affect also the economical aspect of the project. This phenomenon can be considered as normal and experienced world wide especially in the third world countries wherein lack of technical knowledge and resources are major problems.This study concerns the majority of the managerial changes occurred during the project execution step and the role of the organization in handling such changes as competitive and finding solutions in order to manage the project effectively.Many oil companies in Libya were facing numerous problems in the delay of project implementation, poor quality management, planning and poor performance which deviate from the required project objectives. Changes that occur later in the implementation cause serious problems in delaying the project schedule and increasing costs, effectively are reducing the benefits of the project.By Appling the questionnaire that consists of 30 specific questions which have been distributed to 13 Companies under umbrella of National Oil Corporation (N.O.C). Eight out of thirteen companies were responded.The analysis of the data collected from submitted questionnaire has been analyzed using Microsoft Excel 2000. That allows simple setting and manipulation of the data collected.Statistical data and interviews on the respondent companies indicate the following items: Full dependency on the external contractors to fully execute the project implementation that leads to high cost of contracts (EPC contracts).Poor supervision leading to significant delay of the implementation of the project. (Specifically of E P contracts).The Project Implementation profile (PIP technique) has been used on this study to evaluate one of the project which had delay and some other related problems selected random as case study. The analysis covered all the factors for project implementation. Technical factor.Managerial factors.Controlling factors. In order to improve the project management for oil & gas companies listed in this research and to overcome such problems. This study recommends a good communication and coordination system connecting all local petroleum companies and providing data exchange which enables to minimize time, cost personnel and learn from mistakes.
زينب مختار المصري (2007)