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Ciphertext-Policy Attribute-Based Encryption for Access Control of Data in Cloud
Vijaya Lakshmi Paruchuri,N Lakshmipathi Anantha,Vara Lakshmi Konagala,Debnath Bhattacharyya 보안공학연구지원센터 2016 International Journal of Software Engineering and Vol.10 No.8
In Distributed systems, the users with a certain set of attributes can only be able to access the data. At present this process can be done through a trusted server where we will store the data and there will be certain constraints on the access of the data. In this case there will be a possibility to compromise the data and so the confidentiality of the data is lost. An Attribute-Based Encryption (ABE) is an encryption scheme, where users with some attributes can decrypt ciphertexts associated with these attributes. Now this is our turn to develop a system with a more complex policy of access of the encrypted data and which can be called as Ciphertext Policy Attribute-based Encryption (CP-ABE). By using this method the information can't be traded off even through the trusted server where the information is put away. These methods are also secure against the collusion attack. In this method attributes are generally assigned in the form of access trees. The attributes are placed at the leaf nodes of this access tree. In older Attribute-based encryption strategies encrypted data is described by the attributes and policies are given to the user’s keys, while in our system users credentials are described by the attributes and there will be a policy where it tells us about who should access or decrypt the data. So, this type of access method is very much closer to the Role-based attribute-based encryption.
Lakshmi C. Bhagya,Venus S. Anna,Velanganni S.,Muthukrishnaraj A.,Ayyar Manikandan,Henini Mohamed 한국탄소학회 2024 Carbon Letters Vol.34 No.1
Recently, dye-sensitized solar cells (DSSCs) can be seen as a talented alternate to the conservative photovoltaic strategies and has fascinated significant consideration as they offer the opportunity for low-cost and also high alteration photovoltaic (PV) energy [1,2,3]. Over the last decade, researchers have concentrated on developing a photoanode (working electrode) with a diversity of morphologies in order to expand the proficiency of DSSCs. TiO2 is the greatest often active photoanode substantial in DSSCs, owing to its porosity and durable catalytic nature. Recently discovered interface properties such as charge departure, converse recombination, and tricking of photogenerated electrons in semiconductor device outsides self-sufficiently by defining optimal material mixtures and their gathering [4, 5]. To maximize overall energy conversion efficiency (ECE), it is essential to construct a combination of materials consisting of various metal oxide semiconductors (MOS) that reduces recombination currents, improves light absorption, ensures a good electric connection.
A hybrid structural health monitoring technique for detection of subtle structural damage
Lakshmi Krishansamy,Rama Mohan Rao Arumulla 국제구조공학회 2018 Smart Structures and Systems, An International Jou Vol.22 No.5
There is greater significance in identifying the incipient damages in structures at the time of their initiation as timely rectification of these minor incipient cracks can save huge maintenance cost. However, the change in the global dynamic characteristics of a structure due to these subtle damages are insignificant enough to detect using the majority of the current damage diagnostic techniques. Keeping this in view, we propose a hybrid damage diagnostic technique for detection of minor incipient damages in the structures. In the proposed automated hybrid algorithm, the raw dynamic signatures obtained from the structure are decomposed to uni-modal signals and the dynamic signature are reconstructed by identifying and combining only the uni-modal signals altered by the minor incipient damage. We use these reconstructed signals for damage diagnostics using ARMAX model. Numerical simulation studies are carried out to investigate and evaluate the proposed hybrid damage diagnostic algorithm and their capability in identifying minor/incipient damage with noisy measurements. Finally, experimental studies on a beam are also presented to compliment the numerical simulations in order to demonstrate the practical application of the proposed algorithm.
Lakshmi Narasimhan, Vaishnavi(락쉬미 나라심한 배이수나비),Kim, Suk-Kyung(김석경),Lee, Hyun Soo(이현수) 한국주거학회 2020 한국주거학회 학술대회논문집 Vol.32 No.2
While there is a viable increase in the incorporation of gardens and outdoor spaces in residential facilities for elderly which offers them great opportunity to have a healthy life style to be active and to interact with neighbors, however these spaces remain less utilized despite many identified benefits. This can be due to combination of increasing frailty in late life and barriers in accessing the outdoor environments. Therefore, a balance of well-designed easily accessible outdoor environment, and an environment that brings the great natural outdoors into the built indoor environment is much needed in elderly housing design. Biophilic design concept in elderly care design can be approached to refine and rethink the outdoor space and moreover, in the indoor space by consciously incorporating greenery, we are unconsciously reconnecting them with nature. These biophilic design spaces becomes a great source of active social interaction among the users as well. The purpose of this study is to identify on what spaces do the elderly take satisfaction in when it comes to interactive amenities spaces that is provided for them in their residential community and how those spaces can be approached by adopting biophilic design principles. The empirical material of the research consists of case study and an online questionnaire. To study the impact of biophilia design in elderly housing, specific cases which were designed by adopting biophilic design in elderly care were studied, then an online survey was conducted with 30 elderly participants from India and Republic of Korea to know their preferences towards providing them a biophilic interactive space in their housing environment.