درخت حوزه‌های تخصصی

Hail phenomenon is one of the hazardous weather phenomena that can make the highest amount of damage to farms, gardens, cars, rooftops, etc. in a very short time (a few minutes), depending on the diameter of the particles. One of the best ways to study this devastating climatic phenomenon is the use of atmospheric instability indices. The indices which are calculated with the help of radiosonde data give a fairly comprehensive vision regarding the occurrence of such phenomenon. In this study, the incidence of moderate to severe hail is investigated in the period of 1990-2010. First, the atmospheric codes related to hail phenomena were applied to extract the data, then radiosonde data in intended time were received and applying the RAOB software, the physical status of atmosphere was studied. In the studied period, two hail examples were reported on November 27, 2008 and December 5, 2008. In the first instance of hail that occurred on November 27, 2008, the status of some indicators was calculated and it was found that LCL was at an altitude of 284 meters, CCL at an altitude of 1582 meters, LFC at an altitude of 6230 meters, the ice surface at an altitude of 3278 meters, the LI index was -0.2, the K index was 25.7 ° C, and PWC was 28 mm. In the above mentioned conditions, there was a hail with a diameter of 25.4 mm. In the second instance of hail that occurred on December 5, 2008, the status of some indicators was calculated and the results showed that LCL was at an altitude of 280 meters, CCL at an altitude of 1762 meters, LFC at an altitude of 2271 meters, the ice surface at an altitude of 2771 meters, the LI index was -1.4, the K index was 27.1 ° C, and PWC was 23.6 mm. In the above mentioned conditions, there was a hail with a diameter of 3.6 mm. Given that in many ways, the status of most atmospheric indicators in the two above examples of hail were close to each other, it turns out that in similar circumstances, the greater the distance the ice level gets to the summit of cloud, the greater is the probability of hails larger in diameter. The value of this distance for November 27, 2008 was at approximately 6384 meters and for December 5, 2008, it was at about 5012 meters.

Investigation on modern history of urban planning in Iran shows that there are three approaches in the subject under discussion: “Modernism and Westernism”, “Traditionalism and anti-Westernism”, and “Adopt and Adapt”. Proponents of the first approach believe in encouraging methods to use the external concepts. The second, is the idea about ​​cultural and religious values, ​​thereby everything with nontraditional orientation is rejected. In the third approach the thinkers believe that if the parts of tradition are synthesized by modernity, culture and religion can adapt themselves with the development. The purpose of this study is to evaluate the adaptation of traditional urban design patterns of Islamic-Iranian cities in incompatible district of new Iranian cities (spontaneous settlements) and to focus on the application of the third approach in the current situation of Iranian cities. On this basis, the method of comparative analysis has been applied to survey the differences and similarities between historical districts and spontaneous settlements. Studies show that there are rather similarities among physical - spatial parameters (such as structural and environmental criteria) between the two types of districts; because both of these residential districts formed as organic structures that are unstable against unexpected risks and earthquake. However, there are the differences between these two types of districts in organized and formed periods. Despite historical districts that have been consolidated and organized during hundreds of years, spontaneous urban textures formed quickly and without any plan and planning. Meanwhile, the historical districts have usually integrated townscapes and unique materials such as clay, bricks or stone, while this character (integrated townscape and unique materials) never have been seen in the spontaneous settlements. There are similarities in economic and socio- cultural characteristics between residents in the two the types of districts. The residents living in poor economic condition, but under a very strong socio-capital and traditional beliefs; There can be seen several socio-cultural and particularly religious characteristics in people of historical residential districts that are similar with the spontaneous residential places, such as “strong relationship among families, friends”, “hospitality”, “mutual relationship among family members”, strong religious beliefs and the needs for privacy and security. However, these communities are different in some principles such as quality of life and spatial and physical qualities especially in favorable and beautiful urban landscapes. So it can be extracted and adopted excellent principles from traditional and historical districts and adapt them to the inappropriate modern urban districts. With regard to the existence of these similarities, we explain applicable principles of the spatial characteristics and designing quality in the historical district of Yazd to apply in Baghshater District in Tehran as a spontaneous settlement. Findings show that we can use several solutions to reconstruct this zone included: 1) land readjustment as the suitable solution in Baghshater District with regard to the familial residential pattern in historical zone of Yazd such as Fahadan District. 2) Focusing on the traditional concept of mutual relationship in residential houses. 3) Emphasizing on the hierarchy of The entrances and exits of the residential units.

The electronic industry suffers a rapid changing and highly rival environment. Thus, firms have an essential need to strive for acquiring the competitive advantage. Strategy Organizational Agility (SOA) is a tool which enables to assist firms to attain the competitive advantage. Therefore, this study benchmarks the core competencies from a case study within the supply chain network and establishes a set of attributes for augmenting SOA. A novel multi-criteria decision-making structure is proposed to deal with the complex interrelationships among the aspects and attributes. Radial basis function (RBF) neural network can use linear learning algorithm to complete the work formerly handled by nonlinear learning algorithm, and maintain the high precision of the nonlinear algorithm. However, the results of RBF would be slightly unsatisfactory when dealing with small sample which has higher feature dimension and fewer numbers. Higher feature dimension will influence the design of neural network, and fewer numbers of samples will cause network training incomplete or over-fitted, both of which restrict the recognition precision of the neural network. The competence and accountability indicators can the continuously increasing level of agility to be effective. According to the analysis chart production and product design performance indicators alone cannot level a considerable amount of agility to change. But reducing the level of the index level of agility is reduced. Flexibility indices speed and agility level changes can also affect the organization. But with increased levels of these two indicators increased agility rate change indicators will be more flexibility. The results showed that customer knowledge management impact on organizational agility and organizational effectiveness and customer knowledge management through organizational agility has significant positive impact on organizational effectiveness. Finally, some practical suggestions, future research suggestions and research limitations are presented.

The aim of this study was to determine the level and analysis of the components of the organizational health at the Islamic Azad University of Region six. The research method is descriptive and population statistical consisted of region six of Islamic Azad university`s units. The subjects include 320 B.A holder individuals of staff who have bachelor`s degree and higher. From among 175 people were selected .benefiting from multistage sampling and Morgan table. Research elements (Lyndon & kingle) was obtained from organizational health questionnaire, Cronbach`s alpha reliability coefficient of 0.90. for analyzing the data mono sample t-test and Friedman have been used .the results revealed that the health status of the academic enterprise of MAHSHAHR and KHORRAMSHAHR is critical and SHOSHTAR`s academic enterprise in emergency and ABADAN AHWAZ and DEZFOUL academic units were normal. also the experimental mean such as: condition of participation`s components, loyalty and commitment, Direction and leadership in all academic units were lower than average (in an emergency) respectively

The purpose of current article is to study the effect of sense of place on creating the urban identity in new cities. In order to fulfill the mentioned purpose, the key concepts of research and the theories related to the issue were studied. According to it, in order to collect the data, library method and note taking tool were used. The studies indicated the presence of human in the environment and the perceptions arising from physical-spatial structures, social-activity structures, individual-mental structures as the result of defining the meaning of environment convert the space's environment to the place. This definition of meaning has led to the positioning of person in the face of place and it is effective on the quality and quantity of his presence at present and future in that special place. This positioning has been expressed in the frame of sense of place and according to this sense, linking the person with the place is formed. This sense can be equal more and less for a set of persons in the frame of social groups. Different levels from indifference-placelessness to awareness, dependency, affection, commitment and finally loyalty and sacrifice are determined for sense of place. The sense of place is effective on formation of individual and social identity by linking the person to the place and also the dependency sense to the place. The identity of place is also influenced by the sense of place. In other words, individual identity can be found in the special and unique features of him/her and also in the features of a society in which he has been present as a member of it. A place that person is present is also added to the mentioned phrase and therefore, the identity of human will be influenced by individual, social and spatial features. Therefore, it can be said that citizenship identity is influenced by the identity of place and in wider interpretation spatial identity or identity of city.

With emergence of urbanism, complication of urban community system, and occurrence of urban problems, a new paradigm of urban management was introduced that adopted new methods to involve citizens in policy making, planning, and supervision and direction of urban life. Therefore, the main element in managerial methods is involving citizens in urban life. Among the ways to make urban residents into real citizens is training an informing them. What everyday life suggests is everydayness. Everyday life is the very everyday life that is spent on repeated and everydayness activities such as work, rest, commutation, shopping, which all are boring and follow a predictable procedure. Urban spaces inevitably are background of large part of citizen’s everyday life, and therefore, undoubtedly interact with it, which means they both influence and are influenced by the individuals’ everyday life. This paper aims to collect and analyze literature on such interaction. Relation between urban space and everyday life has different aspects. However, they are placed between two contrasting ends, and tend towards one of them: everydayness and daily life; the latter of which suggests creativity, vividness and efflorescence of everyday life. Such life leads to lived experienced and creative moments for an individual, contributing to his/her balanced development. Such life, in the first place, realizes in a space which has individuals actively involved in its production and protection; and formation of such space has not been formed to impose dominant system’s values and rules on individuals. It is only in such space that physical and social dimensions of space are aligned, and spontaneity and efflorescence of urban life realize. It is in such space that diversity and individual differences are maintained at the same as keeping social sustainability. In other words, it is in such space that one can attain the right of being: one can live irrespective of his/her economic status, sex, education level, etc. In such space, individuals’ human rights in terms of access to urban requirements are observed and are subject to justice; people have the right to choose between proactive involvement in collection actions, and interactions, and retirement and relaxing from burden of urban life; collective memoirs of city are formed, and in addition to “form”, the space will acquire a “structure”, which remains in the people’s mind as a common thing. Memoirs that are embodied again as they are recollected, and as Agness Heller’s said, are reviewed in quiet and peace. Such review sets human mind free of sinews of everydayness, and directs towards criticism of the surrounding world. This paper was conducted using description-analytic method. Data collection was carried out using library (documentary) and field methods. This paper tries to study challenges and consequences of training of citizenship and relationship between urban space and everyday life.

Creation of urban identity is the important subject in architecture and urban design. So, this article foci’s on the Creation of Identity in Urban context with Participation approach in Architecture and Urban Design. Corporate architecture is an architectonic discipline which focuses on designing and constructing buildings, spaces or environments with the aim of meeting the needs of a business community. Its objective is spatial perception of corporate values by the company’s employees and customers because for motivation and communication, conveying the corporate values and philosophy clearly is of essential significance for success. Place identity could best be understood as that which makes a place unique. The identity concept from the point of cities and architectural products includes a wide definition covering natural, geographical and cultural products and social life norms. Urban identity, architectural identity and the urban images about them are sometimes formed by very different components in a long period in urban space. In recent days, we often come across with the problem of cities to enter a new architectural and urban formation process in a dimension of losing their original identities. In this context; the city identity is formed in the togetherness of urban participation and natural and cultural values which are required to preserve, unique architectural and spatial characteristics, social accumulation and life style. City identity concept having spatial, social, cultural and economical dimensions should be handled with a totalitarian approach, it must be qualified as a collective result including the urban participation and every interaction which provided the city to reach social participates.

despite important role that has parties volition in the contract based on article 191, contract espousal will be achieve bused on advisable something that is under contract the important role that has silence in the contract may not be responsible but in practice has very legal effects for contract parties. Legal volition is formant from implication and adoption since silence is not, silence only can be symbolic adoption with possess qualification in the country low like American and England not taken in to account silence ancient proverb adhesion mark as a legal low, And only silence cannot obligatory implication.

Sustainability creates solutions that solve the economic, social and environmental challenges. It has been studied and managed over many scales of time and space and in many contexts. The paper reviews the definitions of sustainability respecting the ecologic concept as well the need for balanced sustainability within its three pillars on equal way, then it goes throw Ecologic Architecture with its core requirements and how it’s important to work within the framework of Ecologic Architecture. In the aftermath of climate changes there has been an increase of overall interest in sustainability of Environment material. Sustainable development in living environment is not only a trend. Similarly sustainable development in modern bathroom is not a fad. Contemporary societies are not able to function without water, energy, heat, electricity and fuel. It is obvious that the precious natural resources are not available in unlimited quantities. Therefore is absolutely no alternative to necessity of sustainable development. Man must learn to be more careful with using of natural resources; in this paper describe the Livable eco- architecture that have been explained the interaction between sustainable house and urban conditions in analytical approach.

In order to promote and improve the quality of educational spaces and achieving a comprehensive statistics, evaluation and analysis of schools neglected in most Iran’s schools, while educational spaces play an important role in the social and cultural structure and population growing and schools as one of the most basic educational centers, study on this field is important. Therefore, schools evaluation (in the Shahriar city as a case sample) plays an important role in raising the scientific level of a country and development of urban physical planning in the field of education. It supposed that the schools of Shahriar city in terms of population, area and other qualitative and quantitative aspects are far from per capita and standards of the country’s modernization organization, and according to this hypothesis, to what extent are schools far from relevant standards in terms of population growth, and what are solutions to fix and reform schools? This study is a descriptive - analytical and field study, to collect data, city education department; organization of schools renovation, journals and valid books and papers were used. Then, the date of Shahriar city’s schools to determine its distance from per capita standard was assessed and compared. The study result shows lack of schools area in term of population and per capita standard was about 310 thousand square meters in Shahriar city that will reach to 700 thousand square meters in the future 25 years.

Plants as the life giving entities have important role in mental and physical health of human. In the modern time with expansion of the cities and increase of industrial centers and living style change and decrease of social negligence about green spaces as the factor for mental diseases, altogether have been propounded for many psychologists and physicians. In this way considering green spaces is necessary to peace of mind. This article intends to study sense and visual capabilities of artificial green spaces using descriptive method and their effects on human. The results show that connection with green space directly or using senses can contribute to reach mental health. It is hoped this research can provide conditions to further researches.

The 21st century Nanotechnology has the potential to make a huge impact on sustainability; but to achieve this potential, Nanotechnology is all about getting more function on less space. In other hand, Nanotechnology is one of the most extremely important components in sustainable development. It has the potential to reduce the environmental impact and energy intensity of structures, as well as improve safety and decrease costs associated with civil infrastructure. So, nanotechnology it can one of the most extremely important component for sustainable architecture. In this research we would like to answer below questions: Can nanotechnology be developed in a sustainable manner? How nanotechnology be developed in a sustainable manner? In this Paper, first we brief describe about sustainable architecture and nanotechnology, then we shows nanotechnology it can achieving the goals of sustainable architecture. We propose a new strategy of nanotechnology to achieve sustainable development. Finally, we present a new model for nanotechnology to achieve sustainable development. This work, presents the theory of analytical methods and the analytical approach has explanatory.