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1.
Journeys to a sustainable future have become important to industry, government and research. In this paper, we examine evolutionary, relational and durational perspectives on sustainability journeys. Each perspective emphasizes different facets of sustainability - shifts in selection environments, reconfigurations of emergent networks, and intertemporal comparisons and contrasts. Drawing on our analysis, we discuss implications for sustainability policy, strategy and research. 相似文献
2.
Innovation in a product's design can have significant implications for the organization of competencies across a production network. Currently, discussions on product designs and the distribution of competencies across production networks are based on transaction costs considerations. However, such a view does not consider the transformation costs that arise when competencies across a production network are reorganized because of design changes. We explore the nature of these costs by examining the dynamics associated with Polaroid Corporation's greatest innovation, the SX-70 camera. Our longitudinal study suggests that it is not costless to redraw the boundaries of a firm. In the SX-70 camera case, Polaroid's relationships with its important stakeholders were adversely affected resulting in a deterioration of its competitive position. From this study, we suggest that it is critical to consider the transformation costs involved with radical innovations in order to gain a more complete picture of change in systemic industries. 相似文献
3.
Raghu Raman Hardik Vachharajani Krishnashree Achuthan 《Education and Information Technologies》2018,23(5):1919-1932
Within the context of Rogers theory of perceived attributes, authors propose a framework that can predict students’ motivation to adopt programming contest like ACM (Association of Computing Machinery) International Collegiate Programming Contest (ICPC). In this paper we investigate the attributes for adoption of programming contest in a social group comprising of (N?=?1245) undergraduate engineering students from the regional finals of the contest held in India over a period of 3 years. The results revealed that student motivations are strongly associated with attributes like relative advantage, compatibility, ease of use, peer influence, perceived enjoyment and perceived usefulness. Overall, students expressed positive attitude towards adopting programming contests as it helped improve their problem solving and programming skills and overall employability. Both gender was in agreement that joining and winning programming contests is a status symbol. 相似文献
4.
Prema Nedungadi Karunya Mulki Raghu Raman 《Education and Information Technologies》2018,23(1):113-127
Reduction of teacher and student absenteeism, together with consistent teacher support and training, are critical factors in improving the quality of education in rural India. As part of an ongoing project involving schools and educational centers in rural areas spread across 21 Indian states, this study investigated how implementation of two simple, accessible technologies could not only reduce absenteeism but also increase teachers’ effectiveness and improve student performance. In addition to students and teachers, key stakeholders included educational coordinators who provided support and monitoring regarding use of WhatsApp and two additional apps designed specifically to support simple educational improvements. In our study we coded and analyzed nine months of messages (n?=?8968), both photographs and texts, posted by 26 participants. The number of text messages related to attendance was strongly positively correlated with frequency of interactions between coordinators and teachers. Our approach resulted in increased teacher and student attendance, as well as improvements in lessons and other planned educational activities. This model functions well in rural settings where there is poor internet connectivity and lack of supporting infrastructure. Remote schools can easily adopt this tablet-based model to reduce teacher absenteeism, improve teaching techniques, improve educational resources, and increase student performance. 相似文献
5.
Karmeshu Raghu Raman Prema Nedungadi 《Educational technology research and development : ETR & D》2012,60(4):585-600
A new modelling approach for diffusion of personalized learning as an educational process innovation in social group comprising adopter-teachers is proposed. An empirical analysis regarding the perception of 261 adopter-teachers from 18 schools in India about a particular personalized learning framework has been made. Based on this analysis, teacher training (TT) has been identified as one of the dominant factor which can significantly influence decision by teachers to adopt the educational innovation. Different situations corresponding to fixed and time dependent dynamic carrying capacity of potential adopter-teachers at any time have been developed. New generalized models capturing the growth dynamics of the innovation diffusion process in conjunction with the evolutionary carrying capacity of potential adopters are investigated. The coupled dynamics allows forecasting the likelihood of success or failure of new educational innovation in a given context. Different scenarios for TT are considered based on??constant growth rate model; proportional growth rate model; stratified growth rate model. The proposed modelling framework would be of great interest to education policy makers as it has the potential to predict the likelihood of success or failure of new educational innovation. 相似文献
6.
We examine the incident known as “Climategate” in which emails and other documents relating to climate scientists and their work were illegitimately accessed and posted to the Internet. The contents of the files prompted questions about the credibility of climate science and the legitimacy of some of the climate scientists’ practices. Multiple investigations unfolded to repair the boundary that had been breached. While exonerating the scientists of wrongdoing and endorsing the legitimacy of the consensus opinion, the investigating committees suggested revisions to some scientific practices. Despite this boundary repair work, the credibility and legitimacy of the scientific enterprise were not fully restored in the eyes of several stakeholders. We explore why this is the case, identify boundary bridging approaches to address these issues, and highlight policy implications. 相似文献
7.
V. Govindaraju Neelam C. N. Manjunath H. Venkataramiah T. R. Raghu 《Indian journal of clinical biochemistry : IJCB》2003,18(1):8-14
Conclusion There is considerable epidemiological evidence, which confirms the importance of plasma homocysteine as a powerful predictor
of future risk of coronary heart disease and other complications of atherosclerosis. Treatment of hyperhomocysteinemia varies
with the underlying cause. However, an inexpensive vitamin supplementation with folic acid, vitamin B12 and vitamin B 6 is
generally effective in reducing homocysteine concentrations. Several randomised, controlled trials evaluating the effects
of folic acid based supplements on homocysteine concentrations have been conducted over the last decade. In most patients,
folic acid alone, and in combination of vitamin B12 and B6, has been shown to reduce homocysteine concentrations within four
to six weeks after the initiation of therapy (34).
However, no study has yet demonstrated that lowering of homocysteine by vitamin supplementation decreases the cardiovascular
morbidity or mortality. Avoidance of excessive meat intake and increased consumption of fresh vegetables and fruits is a dietary
measure, which has many health benefits, including a potential to reduce elevated homocysteine levels. The other reasonable
approach is to determine levels of fasting homocysteine in high risk patients and it may be advisable to increase their intake
of vitamin fortified foods and/or to suggest the daily use of supplemental vitamins. Several large scale randomised trials
like Heart Outcomes Prevention Evaluation (HOPE-2) Study, Mcmaster University, Canada, Study of the Effectiveness of Additional
Reductions in Cholesterol and Homocysteine (SERCH), Clinical Trial Service Unit, Oxford, U.K, Cambridge Heart Antioxidant
Study (CHAOS-2) University of Cambridge, U.K, Bergen Vitamin Study, University of Bergen Norway, Women's Antioxidant and Cardiovascular
Disease Study (WACS) Harvard Medical School, U.S.A, Prevention with a combined inhibitor and folate in Coronary Heart Disease
(PACIFIC) study, University of Sydney, Australia, and many others are ongoing to assess the effect of homocysteine—lowering
by vitamin supplementation on risk of vascular disease. 相似文献
8.
Many technology studies have conceptualized transitions between technological generations as a series of S-curve performance improvements over time. Surprisingly, the interregnum between successive generations has received little attention. To understand what happens in the interregnum, we study the transition from 2G to 3G in mobile communications. Our study identifies the presence of forces for both change and continuity across heterogeneous social and technical elements shaping an uneven transition between 2G and 3G mobile communications technology platforms. Unanticipated misalignments and asynchronies that emerged during the journey shifted the incentives of the various actors involved to participate. Based on these observations, we offer several conjectures as to the dynamics that can give rise to temporal discords during inter-generational technological transitions. 相似文献
9.
V. Raghu 《Resonance》1998,3(3):59-61
Barytes is a naturally occurring barium sulfate mineral. A significant portion of the total known reserves in the world is
found in Andhra Pradesh. By virtue of its high specific gravity, barytes is extensively used as drilling mud in oil well industry.
Further, barytes is also widely used in glass, paint and chemical industries. 相似文献
10.
Vasanth Raj P Nitesh K Sagar Gang S Hitesh Jagani V Raghu Chandrashekhar H Venkata Rao J Mallikarjuna Rao C Udupa N 《Indian journal of clinical biochemistry : IJCB》2010,25(4):349-356
Objective of this study was to obtain a better understanding of the mechanism responsible for the d-galactosamine (d-GalN) induced hepatotoxicity and to study the effect of catechin against d-GalN induced hepatotoxicity. Catechin 50 and 100 mg/kg b.wt was administered for 1 week by oral route. Liver damage was induced
by intra-peritoneal administration of 400 mg/kg b.wt d-galactosamine on the last day of catechin treatment. At the end of treatment all animals were killed and liver enzyme levels
were estimated. Dissected hepatic samples were used for histopathology, RNA isolation, expression studies of Bax, Bcl-2 and
p53 mRNA levels and mitochondrial membrane potential studies. We found that increases in the liver enzyme activity and decrease
in antioxidant enzyme activity by d-GalN were significantly restricted by oral pretreatment with catechin. Disruption of mitochondrial membrane potential, up
regulation of p53, Bax and down regulation of Bcl-2 mRNA levels in the liver of d-GalN intoxicated rats were effectively prevented by pretreatment with catechin. 相似文献