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Writer: 

صادق-آخوند

Issue Info: 
  • End Date: 

    اسفند 1385
Measures: 
  • Citations: 

    1
  • Views: 

    203
  • Downloads: 

    0
Keywords: 
Abstract: 

این دو قطعه یکی از قطعات بسیار حساس صنعت لوله سازی است. این قطعات در مجموع 200 تن وزن دارند و پس از تهیه قالب، عملیات های ریخته گری و حرارتی و ماشین کاری (از جنس چدن) که به دستگاه های خاص نیاز دارد، آماده بهره برداری می گردد. قطعه تکمیل کننده که باستر نام دارد با جک هایی که از روی آن تعبیه شده یک فشار در حدود 400000 تن بر ورق که مابین قطعه باستر و دو قطعه فوق قرار دارد وارد کرده ورق را به شکل u و O درآورده و به صورت عملیات تکمیلی به واحد دیگر منتقل می شود.

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

View 203

Issue Info: 
  • Year: 

    2023
  • Volume: 

    17
  • Issue: 

    45
  • Pages: 

    90-98
Measures: 
  • Citations: 

    0
  • Views: 

    376
  • Downloads: 

    114
Abstract: 

Education is a continually developing activity, it shapes the way an individual develops their attitudes, thoughts and behavior. Education is not just about being literate but it is an overall development of the person in every aspect of their lives. A society's educational system can be greatly linked to its culture as the culture that one is in have an affect on the type of curriculum the institutions will develop in order to cater to every individual of that particular culture. Education moulds and shapes a society and it is influenced by the culture of the particular country or society. The educational system acts as a point of reference for the society's needs and demands. The principles that dominate this article is culture and education are interrelated and interconnected. Every educational paradigm is influenced by the culture of the society in which it operates. This essay underlines the extensive connection between culture and education. As a result, the goal of this essay is to depict these features from a Philosophical-Psychological Approach.

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Issue Info: 
  • Year: 

    2023
  • Volume: 

    17
  • Issue: 

    42
  • Pages: 

    151-167
Measures: 
  • Citations: 

    0
  • Views: 

    146
  • Downloads: 

    18
Abstract: 

Artifacts are ubiquitous and influential in our world, but their nature and existence are controversial. Several theories have been proposed to explain the ontology of artifacts. Drawing on Popper's theory of three worlds, this paper suggests a metaphysics for artifacts along the line of a critical rationalist (CR) approach. This theory distinguishes between three realms of reality: the physical world (World 1), the mental world (World 2), and the world of objective knowledge (World 3). The paper argues that artifacts have different ontological components that correspond to these three realms, and that each component is real and causal. The paper shows how this perspective can account for the intentional and functional aspects of artifacts, as well as their dependence on plans that influence different realms of reality. The paper explains how this pluralistic ontology, compared to the rival theories, enables one to explain the relevant ontological problems of artifacts. The paper also explores how this proposal can lead to a research program encompassing a broader range of technologies, such as social artifacts. In sum, the paper suggests that Popper's three worlds theory provides a rich and comprehensive framework for understanding the metaphysics of artifacts.

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

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Author(s): 

TABATABAEIAN H. | MAJD O.

Journal: 

ROSHD-E-FANAVARI

Issue Info: 
  • Year: 

    2008
  • Volume: 

    4
  • Issue: 

    14
  • Pages: 

    55-73
Measures: 
  • Citations: 

    2
  • Views: 

    1357
  • Downloads: 

    0
Abstract: 

This article takes a look on the concepts of technology strategy as well as providing detail information on process oriented approach. The other aim of this article is to show the position of the technology strategy among the business strategy and nominate different perspectives upon this issue, and then two important perspectives will be explained. Following, the characteristics of different approaches for developing technology strategy, especially resource base approach, are introduced and the well known models of resource base approach for developing technology strategy are described. As the conclusion , models are getting compared to each other within a table under the basis of deployment steps of models, level of application, key strategic decision and product/process technology oriented.

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

View 1357

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Issue Info: 
  • Year: 

    2002
  • Volume: 

    15
  • Issue: 

    2 (31)
  • Pages: 

    62-70
Measures: 
  • Citations: 

    0
  • Views: 

    1424
  • Downloads: 

    0
Abstract: 

Esthetic is a natural necessity among all human beings, and the reconstruction of the natural features of prosthesis is considered an important aspect in dentistry. Reconstruction of the natural features in removable prosthesis by characterization of denture base is one of the most important factors. In this regard esthetic, in removable prostheses, is achieved through different techniques such as: tooth selection and arrangement, designing the denture base and acrylic base color. The final goal for all these effects is to achieve a natural appearance for denture. However, other factors such as treatment limitations, different personal needs and general health principles, should be taken into consideration. This article not only reviews the natural appearance of oral mucosa that is replaced by the denture base, but also discusses about the materials used in tinting acrylic denture base and their application techniques.

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

View 1424

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Issue Info: 
  • Year: 

    2023
  • Volume: 

    17
  • Issue: 

    45
  • Pages: 

    231-249
Measures: 
  • Citations: 

    0
  • Views: 

    203
  • Downloads: 

    41
Abstract: 

The problem of personal identity among others may stem from the following question—what does be the person that you are, from one day to the next, necessarily consist of? The diachronic problem of personal identity raises question on the necessary and sufficient conditions for the identity of the person over time. The synchronic problem is grounded in the question of what features or traits characterize a given person at one time. To answer these questions, John Locke discarded the soul and the body as necessary and sufficient substances for personal identity over time. He accepted consciousness as the only criterion for personal identity; the only thing capable of remaining the same and preserving personal identity through change. Though Locke’s argument is somewhat clear and coherent but what remains vague and incoherent is embedded in the question—what exactly is consciousness? How and why should it be the basis or criterion for the determination of personal identity? Using the method of critical analysis, I argue that Locke’s choice of consciousness as the determinant of personal identity, though quite novel, is incoherent and vague. Secondly, Locke had already presumed and anticipated clearly though fallaciously the very thing he wishes to substantiate. I therefore conclude that Locke’s argument is just another way of trying to escape but inadvertently prolonging the difficulty of apparently articulating a distinction between the psychological approach and physiological approach to the problem of personal identity. However, in my submission, I propose the concept of the “other” as alternative approach— a sort of an extrinsic-intrinsic approach to the problem of personal identity.

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

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Issue Info: 
  • Year: 

    2022
  • Volume: 

    52
  • Issue: 

    3
  • Pages: 

    195-204
Measures: 
  • Citations: 

    0
  • Views: 

    261
  • Downloads: 

    83
Abstract: 

Distributed Denial of Service (DDoS) attacks are among the primary concerns in internet security today. Machine learning can be exploited to detect such attacks. In this paper, a multi-layer perceptron model is proposed and implemented using deep machine learning to distinguish between malicious and normal traffic based on their behavioral patterns. The proposed model is trained and tested using the CICDDoS2019 dataset. To remove irrelevant and redundant data from the dataset and increase learning accuracy, feature selection is used to select and extract the most effective features that allow us to detect these attacks. Moreover, we use the grid search algorithm to acquire optimum values of the model’s hyperparameters among the parameters’ space. In addition, the sensitivity of accuracy of the model to variations of an input parameter is analyzed. Finally, the effectiveness of the presented model is validated in comparison with some state-of-the-art works.

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

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Issue Info: 
  • Year: 

    1380
  • Volume: 

    10
Measures: 
  • Views: 

    2086
  • Downloads: 

    0
Abstract: 

یکی از معضلات ثبت سیگنالهای الکتروکاردیوگرام(ECG)  اضافه شدن نویز برق شهر، نویز سرگردانی خط مبنا و سیگنالEMG  به آن است. در این مقاله هدف ارزیابی روشهای مختلف حذف نویز سرگردانی خط مبنا است. این نویز ناشی از آرتیفکتهای تنفسی و حرکتی، جابجایی الکترودها و حرکت آنها روی بدن بیمار است و باعث ایجاد یک سطح شناور روی سیگنالECG  می شود. در اینجا برای حذف این نویز فیلترهای دیجیتال معمولی، فیلترهای وفقی، فیلترهای وفقی سری، فیلترهای وقفی ویولت و روشTSC بررسی و ارزیابی می شوند. نتایج بدست آمده نشان دهنده برتری روشهای وفقی سری و روشTSC نسبت به سایر روشهای به کار رفته است.

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

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Issue Info: 
  • Year: 

    2007
  • Volume: 

    9
  • Issue: 

    1 (33)
  • Pages: 

    77-89
Measures: 
  • Citations: 

    0
  • Views: 

    907
  • Downloads: 

    0
Abstract: 

In order to study the genetic control of resistance to common smut in maize, two resistant inbred lines, K1264/1 and K47/2-2-21 and two susceptible inbred lines, K3304/1-2 and K47/2-2-1-3-3-1, were crossed as K1264/1 × K3304/1-2, K47//2-2-21 × K3304/1-2 and K1264/1 × K47/2-2-1-3-3-1. The F1, F2, BC1 and BC2 progenies were produced and evaluated along with parents using randomized compelet block design with three replications. All generations were artificially inoculated with spordia of Ustilago maydis suspension. Inoculation was carried out 7-10 days after silking through injection of 3 ml of 106 spores/ml fungal suspension, using tip injection method. At maturity, disease severity was determined based on ears infection and analysed according to generation means analysis method for three crosses. Joint scaling test showed that the presence of additive, dominance and epistasis effects, especially additive × additive and dominance × dominance type, and in lesser extent, additive × dominance, in genetic control of resistance to maize common smut. Average broad and narrow-sense heritability based on three crosses data were estimated 80.3 and 57.3, respectively.

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

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Author(s): 

MEGARBANE BRUNO

Issue Info: 
  • Year: 

    2014
  • Volume: 

    3
  • Issue: 

    1
  • Pages: 

    2-12
Measures: 
  • Citations: 

    0
  • Views: 

    437
  • Downloads: 

    721
Abstract: 

Poisoning remains a major cause of hospital admission into the emergency department and intensive care unit. Proper diagnosis is the cornerstone for optimal management of poisoned patients. Since the definitive analytical confirmation of the nature of the toxicant involved in the poisoning cannot be rapidly obtained in the majority of healthcare facilities, diagnosis relies on the medical history and the rigorous clinical examination of the patients well as results of the routine biological tests and the electrocardiogram. Identification of the toxidromes addresses not only the correct diagnosis but also rules out other differential diagnoses. Despite no definitive predictive value, this clinical approach facilitates making decision on empirical treatments and emergent antidotes. Pharmacodynamic tests using specific antidotes including naloxone for opioids and flumazenil for benzodiazepines and its analogues are also helpful to assess the final diagnosis in comatose patients. The objective of this article is to review the toxidromebased approach to common poisonings before toxicological analysis enables the confirmation of the initially suspected toxic etiology.

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

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