330 research outputs found

    A smart material based approach to morphing

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    This presentation gives an overview of the Shape Memory Alloy (SMA) based approach to the research and13; development of adaptive/smart/morphing airframe structural technologies at the Advanced Composites13; Division, NAL. Central to this approach is the efficient integration of thermal NiTi SMA elements with13; polymeric carbon composites. The SMA elements could be either externally placed or embedded in the13; polymeric composite. The external connection could be in the form of mechanisms / devices

    Development and Wind Tunnel Evaluation of a SMA Based Trim Tab Actuator for a Civil Aircraft

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    This paper presents about the development and wind tunnel evaluation of an SMA based smart trim tab for a typical 2 seater civil aircraft. SMA actuator was housed in the port side of the elevator for actuating the trim tab. Wind tunnel tests were conducted on a full scale Horizontal Tail model with Elevator and Trim Tab at free stream speeds of 25, 35 & 45 m/sec and also for a number of deflections of the elevator (30° up, 0° neutral & 25° down) and trim-tab 11° & 21° up and 15° & 31° down). To measure the hinge moment experienced by the trim-tab at various test conditions, two miniaturized balances were designed and fabricated. Gain scheduled proportional integral controller was developed to control the SMA actuated smart trim tab. It was confirmed during the tests that the trim-tab could be controlled at the desired position against the aerodynamic loads acting on it for the various test conditions

    Usage of eco-criticism: as a view of natural environment preserving

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    The environment is sum of all surroundings, living organisms, including natural forces and other living beings. There is a deep relationship between beings‟ life and the environment. As a part of environment human must understand that relationship, but unfortunately the human beings do not care about this relationship and pollute the environment in several ways without any attention. In the process of environmental protection, literature also has an important role to play, because there is a strong relationship between environment and literature. Environment is one of main phenomenon in literature and many literary work have been compiled according to that theme both eastern and western literature. Apart from literature, literary criticism too was affected by environment. As results of this eco-criticism, a new literary theory has arisen. This research mainly focus on how we can use eco-criticism to make an attitudinal change in human mind and how can they lead to preserve the natural environment in literary field. Three novels namely Aranakata pem bada translated by Chintha Lakshmi, Sansaranyaye Dadayakkaraya of Saimon Navagattegama and Diya holmana of Mahinda Kumara Dalupotha were selected as primary sources and many secondary sources too used to the fulfillment of this research goals. Eco-criticism studies the relationship between literature and the physical environment. It takes an earth centered approach to literary studies. By practicing this theory throughout literary work people can understand easily how environment is important to existence of their lives. Although the Sinhala literature was built in an environmental background, it has not developed as an ecological literature. But nowadays, some books that can be categorized under the ecoliterature such as, Aranakata pem bada, Sansaranyaye Dadayakkaraya, Diya Holman are arising. Examining these novels, some concepts related with eco-criticism have emphasized by the authors as follows. Representing environment as a non-anthropocentric phenomenon, criticizing the environmental pollution, making environmental sensibility by producing ecological fact, emphasizing the ethics associated with environment. This means eco-criticism make an attitudinal chance in human mind with the intention of creating eco-minded human society

    An Integrative framework of buyer-supplier negative relationship quality and dysfunctional interfirm conflict

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    Purpose: Problems of relationship quality and interfirm conflict in business to business settings are serious concerns that need to be addressed. Thus, the authors have engaged in an extensive review to promote an understanding of these complex issues. This paper develops an integrated framework for analyzing wide-ranging relations between individual representatives and patterns of interfirm incompatibility for managerial control. Methodology/Approach: The review involves numerous sources that include articles and monographs. A theoretical framework is constructed to integrate fragmented empirical data. In particular, social identity and commitment-trust theories are mobilized for this framework. Findings: The review of studies has a substantial consistency with the theoretical framework. The paper outlines a causal chain from interpersonal agent dissimilarities to dysfunctional buyer-supplier relations, culminating in interfirm pathological conflict. Moderating factors in the causal chain are: agent identity differentiation (for interpersonal dissimilarity), supplier relations mismanagement (for buyer-supplier relationship quality), and interfirm opportunism (for interfirm pathological conflict). Buyer-supplier interfirm incompatibility mediates the causal link between interpersonal dissimilarity and buyer-supplier relationship quality. Identity differentiation, the validation of one’s self-image, is introduced as a process that determines buyer-supplier agent interpersonal dissimilarity judgments. This framework employs a contextual perspective. It describes interactions between observations of micro-level phenomena of interpersonal dissimilarities and macro-level models of interfirm fit. From a managerial perspective, interpersonal relations between individual buyer and supplier agents may be further strengthened by such strategies as expanding the scope of the interpersonal relationship, relaxation of role responsibilities, and volunteering business-related contact referrals. Originality/Value: A new theoretical framework has been devised to predict and explain relationship quality and interfirm pathological conflict in the B to B context. The framework contributes to the value of the knowledge base by serving as a means for building new diagnostic tools for assessment of interfirm behavioral issues affecting exchanges. New concepts are introduced to enhance current literature on B to B marketing. The framework provides concrete indicators that operationally define ideas and enable or improve measurement for empirical modeling

    A Study of Diabetes among Inmates of Old Age Homes in Mysore City

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    The human population is graying, and with it concerns about the aged have been growing. Even as birth rates fall steeply, improved healthcare systems have contributed to unprecedented longevity levels. The challenges of taking care of the elderly now increasingly face developing nations. The boundary of old age cannot be defined exactly because it does not have the same meaning in all societies. The United Nations International Assembly on Ageing has taken 60 years as the boundary to define old age.1 Globally, the number of older persons (aged 60 years or over) is expected to be more than double, from 841 million people in 2013 to more than 2 billion in 2050. Presently, about two-thirds of the world’s elderly live in developing countries. By 2050, nearly 8 in 10 of the world’s older population will live in the less developed regions.2 India, as the second most populous country, is witnessing an “aging revolution.” The major issues in India aging are: rapid growth of older segment; feminization of aging; poverty in old age; high growth of 80 + group and decline in family support base.

    Development and Performance of Power-Operated Garlic Bulb Breaker

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    A power-operated garlic bulb breaker to separate cloves from whole-garlic-bulbs was developed, its operational parameters optimized and its performance evaluated. The garlic bulb breaker consisted of a feeding chute, two-stage padded rubber rollers, a blower, outlets for cloves and skins, a main frame, power and power transmission system. The garlic bulb breaker was evaluated using three types of rubber padding material viz., plain type, button type and corrugated type, with four levels of clearance between rubber rollers viz., 15, 18, 21 and 24mm, three levels of peripheral speed, viz., 259.2, 302.4 and 345.6 m/min. The machine displayed performance parameters in terms of breaking efficiency at 96%, per cent clumps of cloves 1.22, per cent clove damage 1.7, per cent clove loss 1.08, and bulb-breaking capacity of 780kg/h using corrugated padding material fitted at 18mm clearance and 259.4m/min peripheral speed. Operating cost of the machine was Rs. 0.06/kg against Rs. 2.25/kg incurred with manual clove separation of cloves

    A stochastic model for PSA levels: behavior of solutions and population statistics

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    This paper investigates the partial differential equation for the evolving distribution of prostate-specific antigen (PSA) levels following radiotherapy. We also present results on the behavior of moments for the evolving distribution of PSA levels and estimate the probability of long-term treatment success and failure related to values of treatment and disease parameters. Results apply to a much wider range of parameter values than was considered in earlier studies, including parameter combinations that are patient specific

    Ethyl N-(2-benzoyl-4-chloro­phen­yl)­ethane­carboximidate

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    In the title compound, C17H16ClNO2, the N=C—O—C—C fragment is planar within 0.029 (1) Å, and makes dihedral angles of 66.71 (8) and 59.61 (8)° with the planes of the chloro­phenyl and benzoyl rings, respectively. The carbonyl C=O bond is not coplanar with either of the aromatic rings; it makes angles of 42.5 and 23.5° with the normals to the ring planes. In the crystal, very weak C—H⋯O, C—H⋯Cl, C—H⋯π and π–π [inter­planar distance = 3.53 (1) Å] inter­actions are observed

    Synthesis, characterization and antimicrobial studies of (E)-N-((2-chloro-6-substituted quinolin-3-yl)methylene)-4-(substituted phenyl)-6-phenyl-2H-1,3-oxazin-2-amines

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    Research work is planned to synthesize novel (E)-N-((2-chloro-6-substituted quinolin-3-yl)methylene)-4-(substituted phenyl)-6-phenyl-2H-1,3-oxazin-2-amines by the reaction of 6-(3-substituted phenyl)-4-(4-substituted phenyl)-5,6-dihydro-4H-1,3-oxazin-2-amines with 6-substituted-2-chloro-quinoline-3-carbaldehydes in alcoholic medium and in the presence of acetic acid. The structures of synthesized compounds are assigned on the basis of FT-IR, 1H-NMR, 13C-NMR and Mass spectral data. The new compounds are also screened for their antibacterial and antifungal activities. These compounds are showing potent antimicrobial activities due to their chemical structure
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