فیلترها/جستجو در نتایج    

فیلترها

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بانک‌ها




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متن کامل


اطلاعات دوره: 
  • سال: 

    1403
  • دوره: 

    13
  • شماره: 

    25
  • صفحات: 

    82-92
تعامل: 
  • استنادات: 

    0
  • بازدید: 

    14
  • دانلود: 

    0
چکیده: 

Air conditioning systems are used in industries and residential environments with the aim of improving environmental conditions and creating a comfortable temperature for users. Considering the production of sound and vibration in most of its components, the lack of control of the production sound level always exposes the users to unwanted sound, which in addition to hearing complications, also causes fatigue and dissatisfaction with the environmental conditions. . Compressors are one of the most important sources of sound production in air conditioning systems, and screw compressors are one of the most widely used in air conditioning industries. Therefore, the compressor shell should be designed to minimize the transmission of sound from inside to outside. Since the maximum working temperature of compressors is up to 80 degrees Celsius, therefore, in this research, an acoustic test was performed on a sample of a screw compressor shell in two modes of ambient temperature and maximum working temperature inside the acoustic room, and the effect of temperature increase on the sound pressure level. transferred from the shell to the external environment is discussed. Finally, based on the frequency analysis performed in two conditions of ambient temperature and maximum working temperature and comparing the amount of sound transmitted to the environment at different frequencies, practical solutions to reduce the amount of transmitted sound pressure have been presented.

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نویسندگان: 

Hanaee Toktam | Farhangdoust Hadi

اطلاعات دوره: 
  • سال: 

    1402
  • دوره: 

    11
  • شماره: 

    2
  • صفحات: 

    133-152
تعامل: 
  • استنادات: 

    0
  • بازدید: 

    202
  • دانلود: 

    30
چکیده: 

ABSTRACT The attention of contemporary planners to environmental factors and increasing awareness and communication of man with his surrounding environment has increased the layers and defining factors of design and planning concepts. In such a way, a common problem with the issue of environmental capabilities to respond was put in front of the planners. The collection of ideas presented in this era was in the form of responsive planning, focusing on the maximum use of environmental capabilities. The necessity of the emergence of a comprehensive discourse to overcome the plurality of factors, definitions and design methods in the environmental fields has been given less attention. Based on this, the current research aims to organize the leading theories in this field in a targeted manner and seeks to improve them based on their synergy. The structural question of this research is the meanings, examples and meaningful contexts of flexibility in various aspects and scales of urban planning. The research method used is qualitative thematic analysis with the help of artificial intelligence in MAXQDA software in a 6-step processing process. The important application of this research is to structure the minds of the planners of this field to reduce the scattered and interdisciplinary problems of the resources. The results of this research revealed dimensions such as identification and recognizability, diversity and changeability, adaptability and expandability, distribution, separation and continuity, organization and compatibility in the field of flexibility and related to the corresponding parts in urban planning   Extended Abstract Introduction Responsiveness-based design and planning emphasizing the maximum use of environmental capacities to meet users' needs implicitly cause a targeted improvement of environmental quality. As the environmental awareness of contemporary man has expanded and the platforms have become more diverse, many challenges are raised in the field of environment-oriented in the field of infrastructure quality and service provision. Urban developments and new developments in cities should be interpreted with integrated conceptualization. The conceptualization of interpretive flexibility in the planning and designing of public spaces in the city is used as an interdisciplinary perspective in urban space design to open and discuss its connection and potential as an approach to strengthening social cohesion and inclusion. The general definition of flexibility is that it can create places with new forms of meaning and be used for different groups to strengthen its coherence and multidisciplinary inclusion in terms of design and planning of space and body. On this basis, the concept of flexibility is proposed as a principle in the context of design and planning due to its wide range of effects on background phenomena. The history of such a role can be seen in the diversity of users' needs. In such a way, it is impossible to express the specific time and area of the need to pay attention to this concept. This is in line with Oldenburg's theory of "social public spaces," in which being in public space, communicating with people and the environment through observing the streets, sidewalks, squares, and parks of the city is a necessary step for people as a part of their social life. The meaningfulness of the design of the artificial environment was considered. In any case, in the contemporary era, on the one hand, at the same time as the quantitative and qualitative increase of human environmental awareness, there is no longer any phenomenon in the eyes of contemporary man arising from a unique aspect and range of factors. On the other hand, his life needs in the individual and collective dimensions have seen a high diversity, which has led to the formation of multiple semantic domains of past flexibility. The meaning of flexibility in such an interdisciplinary platform and basic design refers to the concept of understanding and responding quickly and efficiently to environmental changes. Such a holistic definition for this broad field of environmental design means the implicit acceptance of the role of scale in the meaningful domain of these concepts. On a macro scale, it means making design options to increase the presence, participation, and power of choices of users of the environment in participatory urban planning and design methods, and on a small scale, it means making design options to increase spatial quality and, as a result, the quality of activities. The daily activities of environmental users are through selection against the "dominant space." Flexibility at different scales is crucial for dimensional optimization, shaping, and structuring spatial features, leading to improved performance of space components and spaces. The development of the concept of "flexibility" from various studies in metropolitan to micro scales, such as interior architecture, allows it to pass the discourse of responsiveness to provide a broad approach to environmental design in which different values, interests, and priorities are prioritized. As a result, the issue of flexibility in environmental design has been raised as a multi-dimensional field in the design and planning of the basic environment. The breadth and complexity of this concept have made the researchers of this field deal with it in one or more ways, and it has been avoided to provide a comprehensive framework about the nature and structuring processes. The current research presents a structured view of flexibility in architecture and urban planning with an environmental approach.   Methodology The methodology to achieve this goal is to use the macro research method and achieve a comprehensive framework by combining categorized interpretations. In such a way that by sorting and categorizing these concepts and bases in a new way, he has found a new level of theoretical findings, which will be a suitable answer for the gaps in scientific knowledge and scientific methods created in this field. In this context, the research method "thematic analysis" has been used with a qualitative approach and the use of library resources. Also, to overcome the breadth and complexity of these concepts and the multi-layer networking of concepts in this research method, artificial intelligence has been used in MAXQDA research assistance software.   Results and discussion In the meantime, attention should also be paid to the fields of influence and application of the results of this research because designers refer to flexibility as the creator of environmental qualities, including dynamism. Also, since flexibility, along with the principles of readability and adaptability, affect the lifestyle and behavioral patterns of the audience of environmental design in architecture and urban planning, it will also be effective in dealing with the challenge of complexity in environmental design factors. One of the key questions for achieving research goals on this issue is how flexibility in environmental design impacts the relationship between flexibility and scale.   Conclusion The most important finding of this research suggests that first, it requires a focus on the conditions under which the processes of perceiving human abilities and discovering the needs of the human audience can manifest. The theoretical framework arises from a comparative approach between design disciplines. These conditions are independent of the final state of the design product, and strengthening the environmental capacities will lead to a direction and an area that includes environmental flexibility. By responding to new situations, the construction of the space and the body within a space building can be adapted to various configurations. Even though the environment may remain constant, the designed place will continue functioning as a strong living system over time.  It also seems that the nature of issues related to flexibility has complexity. Considering that the quality of flexibility in urban planning and architecture is significant in multilevel and multifaceted scales from micro to macro, it is important to pay attention to the scale of different variables. In order to reduce this problem, the consistency and adjustment of the scale of the variables measured in a specific analysis should be considered in the first step.   Funding There is no funding support.   Authors’ Contribution All of the authors approved the content of the manuscript and agreed on all aspects of the work.   Conflict of Interest Authors declared no conflict of interest.   Acknowledgments We are grateful to all the scientific.

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اطلاعات دوره: 
  • سال: 

    1402
  • دوره: 

    8
  • شماره: 

    2
  • صفحات: 

    29-50
تعامل: 
  • استنادات: 

    0
  • بازدید: 

    16
  • دانلود: 

    0
چکیده: 

1هدف:فرهنگ برنامه ریزی در مدرسه و دستیابی به اهداف و مأموریت های از پیش تعیین شده بعنوان پایه ای برای مدیریت مدرسه محوری  است. پژوهش حاضر با هدف، اثربخشی الگوی مدیریت مدرسه محوری و شرایط محیطی بر عملکرد محتوای آموزشی دانش آموزان با نقش تعدیلگری ارزش های اخلاقی انجام شد. روش:روش پژوهش رویکرد آمیخته - اکتشافی (کیفی و کمی) است. در مرحله کیفی با استفاده از تحلیل مضمون مقوله ها، عوامل اصلی و فرعی الگوی مدیریت مدرسه محوری استخراج گردید. همچنین در مرحله کمی تحقیق از روش توصیفی- پیمایشی استفاده شد. ابزار گردآوری اطلاعات در مرحله کیفی مصاحبه نیمه ساختاریافته بود. در مرحله کمی پرسشنامه در راستای مولفه های تحقیق به صورت محقق ساخته طراحی گردید (107 گویه) که با استفاده از طیف 5 گزینه ای لیکرت مورد سنجش قرار گرفت. جامعه آماری در بخش کیفی، شامل 12 نفر از ذینفعان در آموزش و پرورش استان فارس (مدیران، معاونین، معلمان و سایر پرسنل مدارس) می باشد. همچنین نمونه گیری به شیوه اشباع و هدفمند انجام شد. جامعه آماری مرحله کمی تحقیق شامل مدیران، معاونین، معلمان و سایر پرسنل مدارس آموزش و پرورش استان فارس بود و تعداد نمونه آماری با استفاده از جدول کرجسی و مورگان (1970) بدست آمد، که برابر با 382 نفر می باشد. نمونه گیری در این بخش به صورت خوشه ای چند مرحله ای انجام شد. تحلیل سوالات تحقیق با استفاده از نرم افزار  Smart-PLS3انجام شد یافته ها: نتایج پژوهش نشان داد، ارزش های اخلاقی بر عملکرد محتوای آموزشی دانش آموزان تاثیر مثبتی می گذارد. همچنین، شرایط محیطی و مدیریت مدرسه محوری بر عملکرد محتوای آموزشی دانش آموزان نیز تاثیر مثبت و معناداری دارد. نتیجه گیری:نتیجه این که ارزش های اخلاقی باعث افزایش تأثیر شرایط محیطی بر عملکرد محتوای آموزشی دانش آموزان وکاهش تأثیر مدیریت مدرسه محوری بر عملکرد محتوای آموزشی دانش آموزان می گردد. علاوه بر این سطح برازش کلی مدل در حد قوی و قابل قبول (381/0=.GOF) بدست آمد.

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مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources
نویسندگان: 

DEIDDA P. | BANDINO G. | SOLINAS M.

نشریه: 

ACTA HORTICULTURAE

اطلاعات دوره: 
  • سال: 

    1994
  • دوره: 

    356
  • شماره: 

    -
  • صفحات: 

    354-357
تعامل: 
  • استنادات: 

    1
  • بازدید: 

    135
  • دانلود: 

    0
کلیدواژه: 
چکیده: 

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بازدید 135

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نویسندگان: 

نشریه: 

Lancet Microbe

اطلاعات دوره: 
  • سال: 

    2020
  • دوره: 

    1
  • شماره: 

    1
  • صفحات: 

    0-0
تعامل: 
  • استنادات: 

    1
  • بازدید: 

    51
  • دانلود: 

    0
کلیدواژه: 
چکیده: 

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بازدید 51

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نویسندگان: 

مقدم مائده | مؤمنی کورش

اطلاعات دوره: 
  • سال: 

    1403
  • دوره: 

    13
  • شماره: 

    25
  • صفحات: 

    157-171
تعامل: 
  • استنادات: 

    0
  • بازدید: 

    17
  • دانلود: 

    0
چکیده: 

Bazaars are among the few historical buildings that still continue to operate. The Bazaar in a city has been important not only from economic aspects but also from cultural and social aspects. Today, the empty space of such urban spaces, which can become a lasting space by creating a sense of belonging and peace, while meeting the needs of today's people, is felt very much. Sound is one of the main factors in creating memories in the human mind. In order to investigate the role of sound in the traditional architecture of Iran, a research was conducted in the Vakil Bazzar of Shiraz. The final goal of this research is to investigate the quantitative and qualitative conditions of the sound using sound meter software in the Vakil Bazzar of Shiraz. The permissible level of noise pollution in urban spaces is 60 decibels based on the resolution of the Supreme Council of environmental Protection of Iran for commercial areas. The results of this research indicate that in the quietest conditions, the noise pollution for at least 33% of the Bazzar space is higher than the maximum allowed amount of noise pollution. How to improve the sound conditions in Vakil Bazzar, such as reducing noise by creating a masking sound source, creating a pond and a fountain, is one of the most important results of this research.

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مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources
نویسندگان: 

Karamhabibpour Karam | Salahshoor Esmat

اطلاعات دوره: 
  • سال: 

    1401
  • دوره: 

    13
  • شماره: 

    1
  • صفحات: 

    105-140
تعامل: 
  • استنادات: 

    0
  • بازدید: 

    168
  • دانلود: 

    18
چکیده: 

The present research studied the (causal, contextual, and intervening) conditions, strategies, and consequences of violence in the lives of child wives in Chabahar city, conducted with a qualitative methodology based on grounded theory. For this purpose, in-depth semi-structured interviews were conducted with 28 child-married girls in Chabahar city who were selected through theoretical sampling and snowball method. The analysis of the data in the framework of the three-level open, axial and selective coding system showed that gendered inequality and discrimination, women's inferiority, men's value, the culture of silence and the culture of violence play a role in the experience of child-wives in terms of violence (causal conditions), which leads to a type of increased, double violence for them (core category); violence that operates within the framework of the family institution, the main mechanism of which are previous traditions and rules, and the perpetrators of which are men and women who were themselves the victims of the same traditions and rules that they have, now, internalized and used again against their daughters. This increased violence happens in a context where patriarchy is widespread (contextual conditions) and due to the generalized self-deprecation among child wives (intervening conditions), they may attempt to escape, get separated, threaten, and commit suicide (strategies), and these actions have consequences such as symbolic, physical, and sexual violence and even social isolation (consequences).

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نشریه: 

GOLJAAM

اطلاعات دوره: 
  • سال: 

    2006
  • دوره: 

    -
  • شماره: 

    3
  • صفحات: 

    104-90
تعامل: 
  • استنادات: 

    0
  • بازدید: 

    265
  • دانلود: 

    0
چکیده: 

In this research, an apparatus was designed and constructed in order to simulate the storage behavior of hand-woven carpet under different environmental conditions. Silk hand-woven carpet ("Gom") with 115x75 cm dimensions and 102x97 knot per 10 cm was selected and then inserted into the packing simulator with two different laying configurations including flat and folded. The environmental conditions was adjusted at 3 different conditions including 25 ±5% r.h and 30±2°c (July-Tehran-Dry), 65 ±5% r.h and 6 ± 2°c (February-Tehran-humid), 40±5% r.h and 19 ± 2°c (October -Tehran-mild).The carpet sample was compressed under constant loads of 135 and 150 kg. The variation of carpet thickness with time in different parts of carpet was continuously measured using data acquisition system. The result of experiment shows that the carpet thickness is suddenly decreased at a short period of time and then reached to a stable condition. The variation trend of carpet thickness with time is accordance with a logarithm equation (y=axLn(t)-b) which is highly in agreement with Eyring model proposed in creep theory. But at the dry conditions, the variation of carpet thickness at the folded point follow a non-linear power equation (y=ax (t)ˆb) with a low correlation coefficient. However, the variation of carpet thickness at the non-folded point and flat configuration is very low. Generally, at the humidity condition, maximum carpet thickness variation occurred at folded point with folded configuration. On the other hand, carpet thickness variations at dry condition are less those of at humidity and mild conditions. In addition, carpet thickness at dry condition more quickly reached to stable condition than those of at humidity and mild conditions.

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نویسندگان: 

نشریه: 

Lancet Microbe

اطلاعات دوره: 
  • سال: 

    2020
  • دوره: 

    1
  • شماره: 

    1
  • صفحات: 

    0-0
تعامل: 
  • استنادات: 

    4
  • بازدید: 

    60
  • دانلود: 

    0
کلیدواژه: 
چکیده: 

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بازدید 60

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نویسندگان: 

نشریه: 

medRxiv

اطلاعات دوره: 
  • سال: 

    2020
  • دوره: 

    -
  • شماره: 

    -
  • صفحات: 

    0-0
تعامل: 
  • استنادات: 

    1
  • بازدید: 

    53
  • دانلود: 

    0
کلیدواژه: 
چکیده: 

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بازدید 53

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